55030.A+P Group/ALL.800.06.07.RB
No. 3 2007
MAGAZINE
international
Table of Contents
Switzerland
France
Austria
Netherlands
Angst + Pfister AG
Thurgauerstrasse 66
Postfach
CH-8052 Zürich
Telefon +41 (0) 44 306 61 11
Telefax +41 (0) 44 302 18 71
www.angst-pfister.com
[email protected]
Angst + Pfister SA
Boîte Postale 50115
33, rue des Chardonnerets
ZAC Paris Nord ll
FR-95950 Roissy CDG CEDEX
Téléphone +33 (0) 1 48 63 20 80
Télécopie +33 (0) 1 48 63 26 90
www.angst-pfister.com
[email protected]
Angst + Pfister Ges.m.b.H.
Floridsdorfer Hauptstrasse 1/E
AT-1210 Wien
Telefon +43 (0) 1 258 46 01- 0
Telefax +43 (0) 1 258 46 01-98
www.angst-pfister.com
[email protected]
Angst + Pfister B.V.
Postbus 752
NL-3000 AT Rotterdam
Industrieweg 47–49
NL-2651 BC Berkel en Rodenrijs
Telefoon +31 (0) 10 511 3944
Telefax +31 (0) 10 511 7470
www.angst-pfister.com
[email protected]
Succursale Suisse romande
Angst + Pfister SA
Route du Bois-des-Frères 52
Case postale 18
CH-1219 Genève-Le Lignon
Téléphone +41 (0) 22 979 28 00
Téléfax +41 (0) 22 979 28 78
Ufficio commerciale
Svizzera italiana
Angst + Pfister AG
Stabile «Violino»
Via Cantonale 34a
CH-6928 Manno
Telefono +41 (0) 91 610 25 10
Telefax +41 (0) 91 610 25 19
Pewatron AG
Hertistrasse 27
CH-8304 Wallisellen
Telefon +41 (0) 44 877 35 00
Telefax +41 (0) 44 877 35 25
www.pewatron.com
[email protected]
Germany
Angst + Pfister GmbH
Siemensstrasse 2
DE-64546 Mörfelden/Ffm.
Telefon +49 (0) 6105 92 54-0
Telefax +49 (0) 6105 25 469
www.angst-pfister.com
[email protected]
Pewatron AG
Technisches Büro
Neumarkterstrasse 86a
DE-81673 München
Telefon +49 (0) 8926 03 847
Telefax +49 (0) 8943 10 9191
www.pewatron.com
[email protected]
Verkaufsbüro Linz
Angst + Pfister Ges.m.b.H.
Strasserau 6
AT-4010 Linz
Telefon +43 (0) 732 77 51 81
Telefax +43 (0) 732 77 51 81-74
Italy
Angst + Pfister S.p.A.
Via Montefeltro 4
IT-20156 Milano
Telefono +39 02 30087.1
Telefax +39 02 30087. 100
www.angst-pfister.com
[email protected]
Ready-to-fit silicone hoses for pure fluids
4–5
Powerful lift and precision positioning
6–7
Timing belt brings butter into shape
8–9
Motorcycle feeling at its best
10 – 11
Trouble-free installation, high
12 – 13
Belgium
Angst + Pfister N.V. S.A.
Kleine Laan 26c
BE-9100 Sint-Niklaas
Téléphone +32 (0) 3 778 0128
Télécopie +32 (0) 3 777 8398
www.angst-pfister.com
[email protected]
performance in action
China
Angst + Pfister Trade (Shanghai) Co. Ltd.
Rm 1402, West Tower
Zhong Rong Hengrui Building
No. 560 Zhangyang Road
CN-Shanghai 200122
Phone +86 (0) 21 5169 5005
Fax +86 (0) 21 5835 8618
www.angst-pfister.com
[email protected]
Ecological, light and reliably sealed
14 – 15
Pressure sensors – high performance,
16 – 17
small volume
Even futuristic high-performace machinery relies on quality
products from Angst + Pfister. Read more about it
on pages 10–11.
Bringing things to a gentle stop
18 – 19
Balancing light and shade
20 – 21
Tiny detail, central importance
22 – 23
PTFE flat seals – one fits all
24 – 25
Accurate and repeatable positioning
26 – 27
High-performance plastics for fast
28 – 29
Czech Republic
Angst + Pfister spol.sr.o.
CZ-Brno
Telefon +420 739 255 555
www.angst-pfister.com
[email protected]
More about our products
www.angst-pfister.com
machines
Quick-acting couplings – plain and
30 – 31
simple
News flashes
©
Copyright by Angst + Pfister 2007
Subject to alteration.
All specifications for information only.
32 – 34
This gap is filled by specially developed, high-grade, white- or natural-colored platinum-cured silicone hoses. They
meet typical specifications such as:
• compliance with FDA 21 CFR
177.2600 (US Food & Drug Administration regulations)
• compliance with the food regulations
of Germany’s Federal Institute for
Risk Assessment
• compliance with USP Class VI
(Pharmacopoeia of the USA)
• compliance with 3.1.9. of the
European Pharmacopoeia
• certified verification of conformity
with cytotoxicity and hemolysis specifications for medical applications
• suitability for CIP (cleaning in place)
• sterilizability, for example, with
saturated steam at +124 °C and
3 bars for a duration of 40 minutes
or via irradiation
Ready-to-fit silicone hoses for pure fluids
Heinz Birmele, Senior Engineer
In the pharmaceutical, foodand-beverage and cosmetics
industries, and in biotechnological production plants in
general, stringent and very
specific demands are placed
on flexible connections. Silicone rubber hoses are preferred in these application
areas. Their special base materials and processing enable
silicone rubber hoses to meet
the required hygienic, chemical, thermal and mechanical
specifications. With every
order, Angst + Pfister
seamlessly documents the
specification fulfillment with
verification and inspection
certificates.
4
Connecting fittings
Two criteria are decisive for connecting
fittings for sensitive fluids:
• Best possible dead space freedom,
meaning no inaccessible spots and
no corners or edges that are hard to
clean.
• Compatibility of materials such as
AISI 316 L, also known as material
no. 1.4435 or 1.4436.
Under typical pressure ranges, it does
not vitally matter whether press-fit or
reusable screw fittings are ultimately
used. What’s important is the selection
of the correct inner diameter, wall thickness and professional processing of the
hose.
Documentation of proof
On request, Angst + Pfister provides
certification, proof of inspection and
other verification documentation. Even
individual markings on the tubing can
be supplied at the customer’s request, or
eventual supplemental testing can be
arranged. To ensure product delivery on
deadline, requests for such quality
assurance services must be made early
on, at the latest when placing the order.
Angst + Pfister is a trusted name for
quality
The pharmaceutical, food-and-beverage,
cosmetics and biotechnology sectors all
have something in common: they produce or process substances intended for
direct or indirect consumption or that
otherwise come into close contact with
living beings. Hoses and flexible tubing
for these application areas must therefore conform to stringent national and
international regulations, specifications
and guidelines. Moreover, there are
also pure or otherwise sensitive fluids
that must not be contaminated or altered
during pumping. Prescribed routine
cleaning and sterilization processes put
additional stresses and strains on flexible connections.
Materials for sensitive applications
High-alloy stainless steel, nickel alloys,
fluoroplastics like PTFE, enamel and
glass are well-known types of materials
that meet exacting standards. However,
they are often unfeasible for flexible
tubing because they lack flexibility, and
they are rarely suitable for corrugated
tubing because they do not provide sufficient means of emptying and cleaning.
Chemical-resistant high-temperature elastomers are often unsuitable for contact
with food or incapable of meeting other
medical specifications.
The optimal product at the right place in
defined and documented quality – that’s
what Angst + Pfister guarantees. Consult
our specialists. They have the knowledge
and experience to devise practical solutions to ensure that you have the right
flexible connection for the intended application, whether as meter ware tubing
or as a ready-to-fit hose system.
Silicone hose with press-fitted, dead-space-free stainless steel fittings.
Hose data
Nominal widths:
Operating pressure range:
Bursting pressure:
Operating temperature range:
Vacuum stability:
Bending radius:
Manufactured lengths:
3 to 102 mm
up to 15 bars (depending on nominal width)
4 times maximum operating pressure
– 60 °C to +180 °C
90 %
approx. 4 to 5 times inner diameter
up to 10 meters depending on nominal width
and hose version
5
Powerful lift and precision positioning
Christian Rieser, Product Application Engineer
Maneuvering loads within a
factory hall while efficiently
utilizing its entire space has
now been made possible by
an innovative industrial rotary
crane with a telescopic boom.
The movements of the boom
are of special significance.
Angst + Pfister sliding elements
made of NYLATRON® 703 XL
enable smooth operation under heavy loads and without
lubrication. This permits precise and secure positioning of
loads and enhances occupational safety.
The Kiebler AG machine and metal engineering company in Zihlschlacht in
eastern Switzerland is a family business
rooted in the manufacture of farming
machinery and equipment. Originally the
company specialized in producing fully
automatic dosing systems for efficient
hay and silage unloading; today it is a
leading manufacturer of hay cranes in
Switzerland and a well-known crane
maker in Europe. The company with its
current 25 employees has been developing and manufacturing hay cranes
for 10 years now. With the increasing
mechanization and even industrialization
of farming, demands placed on cranes
are continually mounting. Kiebler AG
recognized the new needs early on and
supplies increasingly complex and
refined technologies for modern farming
operations.
From hay crane to industrial crane
The proven hay crane technology was
further developed for use in other application areas, resulting in the creation of
the latest and most powerful generation:
the IDK 150 industrial rotary crane. The
IDK 150 is specially equipped to meet industrial demands and can be customized
with special options ranging to air conditioning or an audio system. The hoisting
power of the IDK 150 is 1.3 tons at a
claw extension of 10 m. The action radius is 10 m around the rotating control
tower. Depending on how it is affixed to
the ceiling of the warehouse, the crane
is able to maneuver above the goods
stored on the floor in a way that makes it
possible to utilize the entire floor space
to deposit loads. This is a capability that
is widely used for sorting out recycling
materials or for the disposal of waste
materials.
Sliding characteristics in the spotlight
Taking into account the heavy loads and
tough physical demands on the sliding
properties of the telescopic arms, the
design engineers sought out a material
for the sliding elements that, without
lubrication, would enable smooth loadmovement operations under all expectable conditions. They worked closely
with the specialists at Angst + Pfister in
selecting the most suitable plastic material and designing the sliding elements.
They found NYLATRON® 703 XL to be a
material that meets the demanding requirements of the IDK 150 industrial crane.
NYLATRON® 703 XL is the ideal material for telescopic booms. It practically
eliminates vibrations (jerking) when the
crane is in motion, which enables exact
positioning of the crane and ensures
greater occupational safety. This material is specially recommended when
no lubrication is desired and yet a long
service life of the sliding elements is
required.
Ideal material for sliding bearings
Broad range of applications
The key advantages of
NYLATRON® 703 XL are:
• Low frictional coefficient:
With the lowest dynamic and static kinetic coefficient of friction of any type
of polyamide, NYLATRON® 703 XL
ensures greater positioning precision
for even the smallest of movements.
Its excellent characteristics make
NYLATRON® 703 XL the preferred slidebearing material for telescopic arms.
They make a variety of demanding applications possible wherever heavy weightbearing, precise, vibrationless and near
wear-free operation are required. You
can even dispense with external lubrication depending on the application.
• No stick-slip effect:
NYLATRON® 703 XL is the only
polyamide material without any stickslip effect under all tested conditions.
This enables finer movements.
NYLATRON® 703 XL is deliverable in
standard sheets with thicknesses of 10,
16, 20, 40, 60 or 80 mm. Other thicknesses and customized shapes are available upon request.
• Greatest wear resistance:
The low dynamic friction coefficient
enhances wear resistance and emergency running properties. In some
cases, no lubrication is required.
Benefit from the advantages of modern
slide-bearing materials. We will gladly
support you in selecting a material.
Order our documentation with the reply
card, or contact our specialists.
IDK 150 in the act of sorting
• Mechanically solid:
With regard to solidity, NYLATRON®
703 XL compares with other slidemodified types of polyamides, but it
can withstand much higher pressure.
NYLATRON® is a registered trademark of Quadrant AG.
Sliding plates made of NYLATRON 703 XL
®
6
7
Timing belt brings butter into shape
Ueli Tamborini, Product Application Engineer
Butter in a trapezoid shape
instead of the conventional
rectangular form is a welcome
creative change of pace. The
slanted edges of the new
shape make folding the butter
wrapper in the packaging
machine much more complex.
The highest demands are thus
placed on the sequence of
movements in the folding station of the innovative MSW200
wrapping machine made by
SchmidTech GmbH. A PUR
high-performance timing belt
from Angst + Pfister is used as
an accurately positioning,
compact, wear-resistant and
low-noise drive for the folding
wheel, which plays a key role
in this packaging process.
SchmidTech GmbH in Dussnang, Switzerland, is an innovative, independent company specialized in the development,
manufacture, installation and maintenance of machines and systems primarily
for the production and packing of butter
and margarine. The company is proud of
its innovative MSW200 molding and
wrapping machine for butter, margarine
and other products with similar viscosity.
The very easy to operate, high-performance parallel processing machine
carries out every work step on two sticks
of butter simultaneously.
surfaces. The core of the folding station
is the folding wheel, inside of which the
sticks of butter are synchronously guided
and precisely positioned at the various
folders.
SYNCHROFLEX® 50 ATP15/1560 high-performance
timing belt
Originally, the individual wrapping steps
were performed using a Globoid gear
with disc carriers and a central shaft.
SchmidTech GmbH sought out a more
flexible solution in view of the change in
format of the product to be wrapped. It
was also looking for a wrapping solution
that would operate with less noise, require less space and cost less to manufacture.
Their superior performance efficiency
enables the belt width to be reduced by
up to 60 % compared to conventional
belts for a given application. By using
narrower pulleys and thereby reducing
space requirements, more compact machines can be constructed and significant
cost reductions can be achieved.
Complex folding procedure
A special highlight of this machine is
its 3D folding station, which is designed
in a way that enables the machine to
wrap rectangular as well as trapezoidshaped sticks of butter. This means that
the folder must be able to move in three
dimensions. Folders are tools that are
automatically guided by arms to the
pieces of butter to be wrapped, fold
the wrapping foil along the edges of the
product and smooth it along the
Successful cooperation
In addition to SYNCHROFLEX® ATP
high-performance timing belts for the
power train of the folding wheel, the
SchmidTech GmbH MSW200 molding
and wrapping machine also employs
various BRECO® timing belts from
Angst + Pfister for handling and transport
functions.
The collaboration between SchmidTech
and the drive technology specialists at
Angst+Pfister resulted in a servo drive
with a SYNCHROFLEX® 50 ATP15/1560
PUR timing belt. The 50 mm wide and
1.560 mm long timing belt with 15 mm
tooth spacing is propelled by a 32-tooth
drive-side synchronized pulley and drives
the gearwheel via a synchronized pulley
with 30 teeth.
Use the reply card to order our documentation on SYNCHROFLEX® ATP highperformance timing belts.
Pulley-shaft connection with cylinder tensioning element
The SYNCHROFLEX® ATP timing belt with
15 mm tooth spacing as well as the configuration of the timing belt pulleys that
drive the folding wheel were selected
mainly on the basis of the following
criteria:
• very high power transmission
• high positioning accuracy
• rigid drive
• low noise emission
Compared to the original solution with
the Globoid gear, the combination of
servo drive and SYNCHROFLEX® ATP
timing belts offers the following main
advantages:
• optimized tact cycles
• less wear on the power train
• more compact machine design thanks
to the space-saving power train
• easier, faster format changes
• high productivity:
wrapping speed for butter units
up to 250 grams:
rectangular shape: 200 units per
minute
Trapezoid shape: 50 units per minute
Top-quality timing belts
SYNCHROFLEX® ATP high-performance
timing belts are made of wear-resistant
polyurethane and fortified with flex- and
strain-resistant load-bearing steel cords.
Their unique patented tooth profile is a
noteworthy feature. The subdivision of
each tooth into two load-bearing partial
teeth optimizes force transmission, tension distribution and tooth engagement,
and reduces the polygon effect. At any
rpm, SYNCHROFLEX® ATP high-performance timing belts are 60 % more
efficient and up to 10 dBA quieter than
conventional timing belts. Their service
life is up to 100 % longer.
SYNCHROFLEX® is a registered trademark
of ContiTech Antriebssysteme GmbH.
BRECO® is a registered trademark
of Breco Antriebstechnik Breher GmbH + Co.
8
9
Motorcycle feeling at its best
Walter Oertli, Senior Engineer
Driving the MonoTracer is like
flying 60 centimeters above
ground. The Peraves MonoTracer is a fully enclosed
two-wheeler that delivers a
dynamic, sporty and economical ride. The new MonoTracer is the latest advancement in the progressive
development of the tried and
tested ECOMOBILE. The vehicle
developers undertook enormous efforts with regard to
driving comfort. For example,
they redesigned the way the
cabin is mounted on the rear
chassis. Angst + Pfister cone
bearings are used in the newmodel MonoTracer.
Side view of MonoTracer
Unique vehicle class
As a new version of the ECOMOBILE,
a vehicle purely functional in design,
the MonoTracer possesses state-of-theart design features that place it at the
top of this unique class of vehicles.
Some of the MonoTracer’s alluring features are profiled below:
Features:
• Self-supporting composite monocoque made of fiber-reinforced
composites
• Roll bar and crash bar
• Panoramic roof made of tinted
PMMA
• BMW four-cylinder engine with
1171 cm3 /130 PS
• Acceleration from 0 to 100 km/h
in 5.7 s
• Top speed: >250 km/h
• Fuel consumption according to
ISO 7118: 4.15 l/100 km at
constant 90 km/h
• Empty weight/permissible
max. weight: 460/685 kg
Equipment:
• Recaro bucket seats/3-point
automatic safety belts
• Air conditioning
• GPS/RDS-4LSP audio system
• Bi-xenon lights
• Cruise control
• Driver frontal airbag (optional)
• CD player (optional)
10
Ergonomics diagram
In developing the ECOMOBILE about
20 years ago, Peraves AG in Winterthur, Switzerland, primarily wanted to
build a safe, high-performance, fully
enclosed motorbike. The company has
since built 90 vehicles that have driven
a combined distance of more than 12
million kilometers. The ECOMOBILEs,
successfully tested under the widestranging and toughest of conditions,
are the prototypes of the MonoTracer
so to speak.
From ECOMOBILE to MonoTracer
Cone bearings elastically connect
the chassis to the cabin.
illustration below (well visible in the
bearing shown on the right). This allows
different spring characteristics to be set
in both horizontal axes. At identical
spring tensions, the larger notches
dampen the force by nearly 50 %. This
enables motors like piston engines that
directionally exert different horizontal
forces on the bearings to be optimally
mounted.
The standard hardness of the elastomer
is 60 Shore A. The elements are also
deliverable in hardnesses of 45 and 70
Shore A.
The rear chassis frame of the
ECOMOBILE was connected to the
cabin by round buffers. This connection
is unproblematic in terms of safety and
stability. The only weakness of this
solution was that excessive vibrations
were transmitted to the cabin. In further
developing the ECOMOBILE into the
MonoTracer, Peraves made a lot of
investments aimed at, among other
things, enhancing comfort. For example, the fastening of the engine
bracket and the chassis to the
cabin enclosure was redesigned to reduce vibration. In cooperation with Angst + Pfister’s
specialists, Peraves’ engineers chose
Angst + Pfister’s optimally constructed
cone bearings to replace the original
round buffers.
The MonoTracer is also equipped with
additional Angst + Pfister components:
• Various stop buffers
• PUR drive belts for both support
wheels
• Sealing profiles for the cabin
sealing
Different spring characteristics
Angst + Pfister has an extensive assortment of cone bearings on hand. Our
specialists will gladly advise you in
the selection of flexible and vibrationabsorbing bearings.
The cone bearings consist of two metallic cones, an elastomer element and two
stop rings. The inner cone core is connected to the outer cone core by an
elastomer layer made of NR. In cone
bearings, this enables two parts to be
elastically connected to each other as in
the case of the chassis and the cabin.
The two stop rings safeguard against
tearing. Notches in the elastomer element make different spring tensions possible in both horizontal axes. The notches in the elastomer element are thus the
only difference between the two identically constructed cone bearings in the
11
Trouble-free installation, high performance
in action
Heinz Birmele, Senior Engineer
The agile street sweepers
made by Aebi MFH AG are
very compactly constructed.
The installation space for
suction hoses around the
hydraulic power unit is thus
very tight. The innovative,
highly flexible Angst + Pfister
UNIVERSAL VHF hoses selected
for this application can be
optimally installed even with
minimal bending radii. The
low bending resistance
additionally simplifies installation. The smooth exterior
surface of the hoses facilitates
the use of hose clamps. The
following article presents
Angst + Pfister’s UNIVERSAL
VHF hose solution using a
typical vehicle model as an
example.
Aebi MFH AG, which has been operating out of Hochdorf in the Canton of
Lucerne for more than a century, ranks
among the world’s leading suppliers of
municipal street-sweeping machines. Cutting-edge complex technology and high
manufacturing quality are Aebi vehicles’
key to success in the international market.
excellent agility and universal deployability in summer and winter distinguish
this vehicle model. The hydraulic traction
drive and the drives of accessory equipment such as sweep brushes or snowplough blades are supplied by a central
hydraulic unit powered by a common
rail diesel engine.
Several hundred units of the Aebi MFH
2500 vehicle have been built since
2002 in a variety of customized versions. The Aebi MFH 2500 is equipped
with a debris collector with a capacity
of approximately 2,000 liters, which
typically meets the needs of small and
midsize communities. Its modern and
appealing appearance as well as its
Complex installation situation
The width and length of the vehicle are
kept as small as possible to meet customers’ needs. The installation space for
the power train elements and additional
components is thus limited. An extremely
compact construction design is therefore
an inevitable selection criterion, especially with regard to the hydraulic power
unit area with pump, tank, filter and oil
cooler. Flexible hose lines that ideally fit
in tight spaces are used to connect these
components.
Smooth inside and out, and nevertheless highly flexible.
Challenging operating conditions
Easy assembly
Consistent use of hoses brings big advantages. Assembly inaccuracies and thermal expansion of rigid components as
well as vibrations and movements of
elastically mounted parts are compensated by them. In addition to having tight
bending radii, the hoses must also fulfill
further requirements, including:
• resistance to pressure up to 10 bars
at cold start
• chemical resistance against specified
ISO VG 68 oil grades
• no impairment of function with up to
50 % vacuum in the pump suction
pipe at cold start
• short-term resistance against oil temperatures of up to +100 °C in the
drive unit in extreme cases
• external-layer resistance against
weathering, oil splashes and
detergents
• possibility of assembly on hose sockets with conventional hose clamps
or press sleeves
The easily bendable UNIVERSAL VHF
hose offers an additional benefit that
shouldn’t be underestimated: reduced assembly time. It can be optimally mounted in almost every installation situation
without added effort because it is flexible
but nonetheless stays in position until
the hose clamps are tightened.
Oil-resistant UNIVERSAL VHF suction and
pressure hoses with an NBR inner layer
are available from stock in commonly
used dimensions between 20 mm and
76 mm. On request, Angst + Pfister also
supplies the hoses in nominal widths
up to 152 mm as well as with an EPDM
inner layer. Ask us for information.
The UNIVERSAL VHF suction and pressure hose fits even in
tight spaces.
Aebi MFH 2500 street sweeper in daily use.
12
13
Ecological, light and reliably sealed
Ben Vermeer, Profit Center Leader
The Nefit company developed
the N5 HR household boiler
specifically for the purpose of
entering the UK market. The
main design objectives were
high energy efficiency and a
light and compact construction, because boilers are usually mounted on kitchen walls
in the UK. Devising an airtight
seal between the plastic
housing and the boiler proved
to be a tough challenge.
A custom-designed lip profile
seal from Angst + Pfister
ideally met the demanding
specifications.
The Netherlands-based Nefit company
manufactured its first continuous flow
heater in 1932. In the early 1990s, Nefit
was taken over by Buderus, a German
competitor. After several years on the
market, the Nefit-Buderus joint enterprise
was acquired by the Bosch group. The
name Nefit Buderus B.V. was changed to
Nefit B.V. in 2005. Today Nefit boilers
are sold throughout almost all of Europe,
frequently under the name of central
heating system manufacturers who produce for the Bosch BBT brand.
already offered by the company. The
Nefit N5 HR central heating unit was
specifically developed for the needs of
the UK market using the technology already employed in the Nefit Smartline
model. Nefit wanted the new boiler
under development to be less costly as
well as smaller and lighter in view of the
wall mounting in kitchens – all in all a
formidable challenge.
Economical and ecological heating
To make the new boilers lighter, more
compact and less expensive, Nefit
decided to manufacture the housing
entirely out of polypropylene, in contrast
to the company’s other boilers that have
housings made of a combination of
plastic and sheet steel. Besides reducing
weight tremendously, this choice of
material also enabled more freedom
of design. This also permitted considerable cost savings because the various
parts of the housing could now be formed in a single work step. Moreover,
polypropylene is much less expensive
than steel.
The incentive to accelerate the development of the new N5 HR gas-fired boiler
was the change in UK regulations, which
now require new boilers sold in the
UK to be based on HR technology. HR
stands for high return and denotes a
concept for increasing energy efficiency
by minimizing energy loss. Boilers based
on HR technology generate heat with
less gas consumption than conventional
boilers. Since Nefit had not been present
in the UK market, a huge sales area
opened up for the HR technology
Light, compact and inexpensive
construction
Easy boiler maintenance was also a
main specification. The effortlessly removable housing and the easy accessibility of all components make maintenance simple. The heating cell used in the
Nefit Smartline was adopted for the Nefit
N5 without any modifications.
Challenge for sealing technology
Devising an airtight seal between the
polypropylene housing and the boiler
was a very complex challenge. On one
hand, intake of outside air must be
ensured; on the other hand, no flue gas
can be allowed to escape.
The difficulty of this challenge is evidenced by the requirement specifications
placed on this seal:
• easy assembly
• tight seal at low pressure
• corners must be fitted at right angles
• three-dimensional geometry
• economical solution
• life span of 15 years
EPDM cellular rubber
EPDM soft rubber (70° Shore A)
Threaded hole
Boiler housing with lip profile seal
14
Nefit boilers N5 HR
Thanks to its extensive expertise in the
field of elastomers and its corresponding
production capabilities, Angst + Pfister
was able meet the specifications to the
customer’s full satisfaction. Together they
ultimately developed a seal that is just as
aesthetic as it is operationally safe. Let us
advise you on your sealing problems.
The answer: Customized elastomer
profile
At first, Nefit looked for a solution by
pressing on clamp profiles on the outer
edge of the housing. However, the steel
core inside the profile made it impossible
to negotiate the corners. Angst + Pfister
then proposed a lip profile seal as a solution; its base would be pressed into the
groove of the inner container made of
plastic and the lip would serve as a seal.
To achieve a perfect seal at the edges, a
duplex profile was selected. Its base consists of EPDM soft rubber (approx. 70°
Shore A), while the lips are made of
EPDM cellular rubber. Thanks to the cellular rubber lips, the profile can be fit to all
edges and curves, guaranteeing a perfect seal. It is important to keep the angle
of the sealing lips within the determined
tolerances. A band is added as protection against warping during assembly. It
prevents an elongation of the profiles
that were glued together into rings, thereby preventing the seals from warping
during assembly.
Cross-section of special EPDM profil
15
Miniature pressure sensors with amplifier
Pressure sensors – high
performance, small volume
To create the compact pressure sensors/
switches, MP-Sensor GmbH searched
for a tiny pressure sensor with an integrated signal amplifier that would save
space for separate amplifier electronics.
The smallest pressure sensors in
Pewatron AG’s product range met this
requirement. Those sensors belong to the
XFGM series with the dream measurements of 7 x 7 millimeters. At a supply
voltage of 5 VDC, the XFGM sensors
give a compensated and linearized output signal of 0.2 to 4.7 VDC proportional to the imposed pressure.
Peter Felder, Product Manager
for Physical Sensors
Piezoresistive sensors are
considered to be a very exact
and inexpensive alternative
for measuring pressure.
Piezoresistive pressure sensors from the product line of
Pewatron AG, an enterprise
of the Angst + Pfister group,
are used in many application
areas such as automotive engineering, medical devices,
pneumatic equipment, building services engineering and
technical consumer goods.
For more than 25 years, Pewatron AG
has been successfully operating in
Switzerland and abroad as a competent
supplier of individual, economical solutions in the fields of sensor technology,
data recorders, electronic components,
power supply units, DC/DC converters
and devices for uninterruptible electric
power supply. The company joined the
Angst + Pfister group in July 2006.
Small, high-performance pressure
sensors/switches
As a supplier of industrial sensors focused on vacuum and pressure sensor technology, MP-Sensor GmbH in Neuhausen,
Germany, develops and manufactures
compact components for intelligent
sensor solutions, which are setting new
standards in automation technology.
Industrial vacuum and pneumatic
16
applications call for an equally compact,
lightweight and cost-effective solution for
pressure monitoring. The PSP and PSV
series of pressure and vacuum switches
ideally meet these requirements. With
dimensions of 20.5 x 10 x 20 millimeters
and a weight of just eight or five grams,
these switches are unique and competitively priced as well. An array of sensors
and switches with pressure ranges of –1
to 0 bar, 0 to 1 bar and up to 0 to 10
bars opens up new deployment possibilities, particularly in the fields of handling
and vacuum technology.
Pressure sensors with integrated
amplifier
Fujikura Ltd. in Tokyo has been producing piezoresistive pressure sensors for
pressures from 20 millibars to 12 bars
for more than 25 years. These sensors,
whose sensor elements react to pressure
with a change of electrical resistance,
are used in a variety applications worldwide. Pewatron AG has been the exclusive vendor of Fujikura sensors in
Switzerland, Germany and Austria for
more than 20 years, and is the official
dealer for the eastern European Union
member states. The company offers a full
range of different sensor constructions as
well as customized solutions – for both
DIL and SMD technology. The sensors
supplying an already amplified voltage
output signal have become bestsellers.
The signal amplification is provided by
an application-specific integrated circuit
(ASIC), which can be placed in the
existing casing without difficulty. The footprint of the smallest sensor with amplifier
is just 7 x 7 millimeters.
Reliable switching and measuring
The collaboration between Pewatron and
MP-Sensor is becoming more successful
every year. Thanks to their reliability and
elegant design, the products resulting
from this cooperation are increasingly in
demand on the market. These sensors
can be found in a vast range of applications, such as in packing machines,
bottling plants, industrial robots and
pick-and-place machines.
Miniature pressure sensors mounted on a handling robot.
Please order our documentation on pressure sensors, or request a consultation
with Pewatron AG’s specialists.
Miniature pressure sensors on a pick-and-place machine.
17
Bringing things to a gentle Stop
Jan Veenman, Product Application Engineer
When it comes to avoiding
hard impacts, PUR buffers
from the Angst + Pfister
product range are often the
ideal solution. When used as
crane buffers, they cushion
the stop when the crane trolley
reaches its end position. Stop
buffers are used on roller
coasters to prevent the cars
from bumping into each other
and sustaining damage when
passengers embark and
disembark or when the train
is in motion making its twists
and turns. A look at two Dutch
companies illustrates the wide
range of deployment applications for Angst + Pfister PUR
buffers.
Shock-absorbing buffers made of
cellular PUR elastomers are increasingly
gaining acceptance in a vast range of
application areas. Two very different
examples illustrate the demanding
applications that Angst + Pfister buffers
are used in.
Crane buffers for large mast cranes
The Huisman-Itrec company was formed
in 1982 through the merger of Huisman
and Itrec. Originally, Huisman specialized in manufacturing cranes for cargo
ships, and Itrec specialized in designing
and constructing heavy-duty hoisting and
transport systems. In the early 1980s,
Huisman-Itrec was already developing
heavy lift mast cranes. The largest crane
built by the company so far is rated and
approved to lift loads of up to 800 tons.
The company is currently working on a
crane designed to lift up to 3,000 tons.
Huismann-Itrec uses crane buffers made
by Angst + Pfister as stop buffers for
crane trolleys.
Thrills backed by safe technology
Ideal buffer material
There are potential synergies between
building cranes and roller coasters. The
takeover of Netherlands-based Vekoma
Rides Manufacturing B.V. by HuismanItrec in 2001 made it possible to utilize
these synergies to their fullest. Vekoma
Rides has years of experience in building
roller coasters and other amusement park
attractions and has established itself as
one of the three biggest players in this
market.
Angst + Pfister offers a comprehensive
range of standard buffers made of cellular polyurethane elastomers. These materials, in contrast to rubber, are volumecompressible. Pressure loads first compress the volume of the pores, and only
then is the material itself deformed. This
results in optimal progressive cushioning
characteristics. The material can be compressed by 20 percent with a minimum
of lateral expansion. Microcellular
polyurethane elastomers are resistant
to oil, grease, ozone, UV radiation and
aging. The material can be used in
temperatures ranging from –20 °C to
+80 °C.
The best-known type of roller coaster
made by the company is the Boomerang,
47 of which have already been built for
as many amusement parks. On a relatively small footprint of 90 x 60 meters,
the Boomerang features six track sections
including loops through which passengers are sped upside down. The train of
seven four-seater cars is first towed backward up a 35.5 meter high ramp that
resembles a rocket launch pad. Once at
the top, the train is released, rushes forward down the ramp, speeds through the
next sections and soars up a second
ramp. From there, it is pulled all the way
up. When released, it retraces the roller
coaster course backwards.
All roller coasters built by Vekoma Rides
are equipped with buffers made by
Angst + Pfister that prevent the cars from
colliding and sustaining impact damage
when in motion.
Roller coaster equipped with end-stop buffers
The standard buffers are available from
stock in numerous shapes, sizes and
material densities. Their main areas of
application are in general mechanical
engineering and crane and elevator
manufacturing. The standard buffers are
deliverable with central inner or external
mounting threads or with a square assembly plate.
Crane trolley with end stop
Angst + Pfister is a partner for innovative
applications in the area of shock absorption and vibration insulation. Since, as
a rule, every application has its own
specific requirements, we recommend
that you contact us in the early design
phase of your product. For tasks that
cannot be performed with standard
components, we offer customized components. Please order our documentation
containing information on technical
specifications.
End-stop buffer D with threaded bolt
18
19
Balancing light and shade
APSOvib™ type 6/15 gas spring
Andreas Gogl, Sales Engineer
Glass facades are in vogue.
But inside buildings, large
glass surfaces can only be
truly enjoyed if there is
appropriate sun protection.
This is especially important in
offices. Sunlight might reflect
annoyingly off monitor screens
and light reflecting off window
panes may strain the eye,
yet being able to look outside
contributes immensely to a
pleasant working environment.
Angst + Pfister gas springs
enable sunblinds made by
the Bremetall company to be
adjusted to your personal
comfort.
Bremetall Sonnenschutz G.m.b.H. specializes in outdoor textile sun protection
technology. It supplies its products
throughout Austria through qualified
specialty dealers. The company also
successfully exports its products throughout Europe and the USA. Its product
range encom-passes folding-arm awnings
and external window blinds, various
winter garden shading systems, universal
wind and privacy screening, as well as
customized solutions. Bremetall offers
the widest range of outdoor textile sun
protection products in Austria. Approximately 50 employees at the main factory
in Thaur near Innsbruck make sure that
all plastic, metal and textile components
are perfectly shaped, cut and fitted.
Comfort and ambiance
External roller blinds are the classic sunblind solution. Retractable exterior window shades are an extremely comfortable combination of drop-arm awnings
and external roller blinds. Thanks to the
stable extension arm, the view outside
remains undisturbed, but the window
pane is shaded over the entire surface.
The awnings offer excellent protection
against the sun, glare and heat. The
extension arms can be equipped either
with torsion springs or gas springs.
In exposed installation areas and for
year-round glare protection and privacy
shading, awnings with gas spring
extenders are the optimal solution.
APSOvib™ type 6/15 gas springs supplied by Angst + Pfister with special eye
type 16-1-111-96-A17-B17 and various
thrust forces are employed in such
awnings. When lowered by the lever,
the textile fabric extends outward like a
canopy. The advantage is that when
you start to close the awning, it blocks
out the sun much sooner than a vertical
blind, while still allowing you to enjoy
the view beneath the canopy without
being blinded by the sun’s glare. The
outwardly extended surface makes the
awning more vulnerable to the wind, but
the extension force of the gas springs
on the left and right of the folding arm
counteract that.
Awnings are classified into wind
resistance categories. The choice of gas
spring can improve the wind-resistance
rating. The high extension force of the
gas springs creates more tension in the
awning, thus ensuring greater stability
against the wind.
20
External roller blind
Retractable exterior window
shade
against the end positions of the gas
spring. The end-position damping is determined by the amount of damping oil
filled inside the gas spring.
Wide range of applications
Winning aspects
The following advantages enabled
Angst + Pfister to score points with its
special gas springs for the complete
series:
• Customized measurements: Since all
adjacent components were already
being produced in series with specific
tools, the gas spring had to fit exactly.
This was only possible with a customized gas spring with special
dimensions.
• High corrosion resistance: This is
assured by high accuracy in production and by coating the individual
components in the supplier’s factory.
• High-grade precision coating of all
components.
• Highly gas-tight.
• Long service life for outdoor use.
• Attractive bulk price.
Gas springs of identical size are used on
all widths of awnings. The extension
force is adapted to the width. Technical
advice, fast provision of samples, supply
flexibility, high product quality and the
ability to deliver specially ordered gas
springs with other extension forces on
short notice were prime reasons why
Angst + Pfister was chosen as a supply
partner.
The range of applications for gas springs
is virtually unlimited. Typical application
areas are:
• Hatchbacks and engine hoods,
luggage hatches on tour buses, foldout canopies for vending vehicles.
• Skylights.
• Kitchen furniture, hospital beds,
operating tables and tanning beds.
• Coverings and casings of photocopiers, swivel arms for computer
monitors.
• Pivot mechanisms for safety and noise
protection hoods for lathes and milling
machines.
Please contact our specialists for further
information.
Simply indispensable
A gas spring is a cylinder filled with gas.
The higher the gas pressure, the greater
the force the piston pushes out of the
cylinder tube. This extension force is
used to lift loads or to aid the lifting process. Angst + Pfister offers gas springs
in various dimensions with differing pressures and made of diverse materials,
such as stainless steel. Depending on the
application, end-position damping is
used, which dampens the piston stroke
APSOvib™ is a trademark of Angst + Pfister Group.
BREMETAL® is a registered trademark of
Bremetall Sonnenschutz G.m.b.H.
21
Tiny detail, central importance
Insert made of PA6 (GRILON® BK-30)
Christian Rieser, Product Application Engineer
The UltraSpeed 6000 drilling
and routing center for printed
circuit boards is the flagship
machine of Posalux SA. Each
component of the UltraSpeed
6000 is designed to contribute
its utmost to the total functionality of the machine, and
the highly stressed workpiece
clamps are no exception. To
develop the workpiece clamps,
the engineers at Posalux SA
worked together with the
plastic technology specialists at
Angst + Pfister. In all developmental stages up to the start
of series production, the collaboration enabled them to
benefit from Angst + Pfister’s
extensive expertise and wide
range of products.
Posalux SA was founded in 1943 in Biel
in the Bernese lake region. Innovation,
experience and the will to perfection
have made Posalux the world’s leading
manufacturer of drilling and routing
machines for the printed circuit board
industry as well as microdrilling centers
for the production of gasoline and diesel
fuel-injection nozzles. The company
generates around 80 % of its sales revenue in the Asian market. More than 180
excellently trained employees in development, production and maintenance
guarantee the highest quality.
To manufacture printed circuit boards efficiently, precisely and in huge numbers,
you need sophisticated technology – one
that sets new standards in meeting the
demands of the market. Just like in Formula One racing, “faster, more precise,
more reliable” is also the slogan in
Posalux AG’s industry. The UltraSpeed
6000 drilling and routing center is the
company’s showpiece. It performs multilayer processes on standard printed
circuit board formats of 21” x 28” and
24” x 28”.
When equipped with the maximum of six
dual stations (each dual station consists
of two drill heads), the UltraSpeed 6000
can perform 500 to 600 drillings per
minute. Drillings can be made as small
as 0.075 mm in diameter and with a
minimum spacing of 0.3 mm. A printed
circuit board can contain up to 300,000
drillings. The high-frequency spindle operates at up to 300,000 revolutions per
minute. During positioning in the X/Y
axes, the high acceleration of 20 m/s–2
exerts a strain force of 2 Gs.
To ensure the desired productivity, quality
and precision when drilling the holes, the
multilayer printed circuit boards must
be pressed firmly against the support surface during the process – a small but
eminently important detail. The required
pressing force of 100 to 120 N per
drill head is directly exerted at each
high-frequency spindle by a replaceable
plastic insert. A wide range of demands
are placed on the inserts, which are
made by Angst + Pfister. These include
relatively high forces, the high frequency
of the swelling pressure loads, the
required smallest possible dimensions,
wear resistance and gentle handling
of the printed circuit boards.
Dual stations with two spindels each working in parallel
Initially, plastic semifinished parts were
machine processed into prototypes, and
then pilot batches made of POM-H were
manufactured. The prototypes and pilot
batches confirmed the functionality of the
components. To further optimize the inserts up to series-production readiness,
the development engineers at Posalux
worked in close cooperation with the
plastics specialists at Angst + Pfister. The
material, the geometric design and the
quantity structure were reevaluated. For
the material, GRILON® BK-30 – a 30 %
glass bead reinforced polyamide 6 –
was chosen as the definitive solution,
and injection molding was selected as
the lowest-cost method of large-batch
serial production. Through injection
molding, the impact-resistant, wearresistant and form-stable GRILON® BK-30
inserts can be efficiently produced in
large batches with optimal component
geometry. After the injection molding
process, Angst + Pfister fits an O-ring to
the insert to seal off the outlet air, thus
furnishing a completely ready-to-install
part.
The extensive range of services
that Angst + Pfister offers in the area of
plastics technology enables customer
support in all phases of product development, from the selection of the materials,
development and design of parts and
prototyping, to small- or large-batch
series production. For every customerspecific task, there is a suitable method
of processing plastics, such as machine
processing of semifinished parts, cold
and hot forming, deep drawing, molding
in PUR and PA, or extrusion and injection
molding of thermoplastics.
High-frequency spindle with insert
The main advantages of injection
molding are:
• very-low-cost molding process for
large batches
• very high repeat accuracy and
process safety
• wide possible range of component
shapes
• minimal material consumption
• many material variants are available
on the market
Make use of our experience and entrust
your problems to our specialists – preferably in the design phase of your device. We look forward to every new
challenge.
UltraSpeed 6000 LZ
GRILON® is a registered trademark of EMS Chemie.
22
23
Excellent material properties
PTFE flat seals – one fits all
The advantageous characteristics of the
NOVAFLON® sealing material include:
• resistance against most alkalis and
acids across the entire pH spectrum
from 0 to 14
• high pressure resistance
• stopped cold flow
• high mechanical resistance
• wide temperature spectrum from
–210 °C to +260 °C
• unlimited storage life
• excellent and high-grade leakage
properties in accordance with
German TA Luft regulations
• approvals: FDA, TA Luft, DVGW, BAM
• passed the VDI 2200 blow-out test
Hugo Keller, Senior Engineer
Wherever removable connections to flanges, fittings, tanks
or pumps have to be reliably
sealed, highly adaptable universal flat gaskets made of
modified PTFE are employed.
The flat-sealing PTFE material
NOVAFLON® is chemically
highly resistant and stands
out for its minimal creep
propensity. This material from
the Angst + Pfister product
range has proven to be an effective problem solver in
many application areas in the
chemical, pharmaceutical and
food industries, as well as in
general machine, equipment
and pipeline engineering. Its
excellent material properties
form the basis for its universal
application spectrum.
Feeder pipes
Veolia Valorec Services AG in
Schweizerhalle near Basel is responsible
for supplying energy to various chemical
firms such as Novartis, Ciba, Syngenta
and Huntsman. The company relies on
NOVAFLON® 300 PTFE flat gaskets from
Angst + Pfister for many applications. Its
material properties permit a wide spectrum of applications that far exceeds that
of conventional materials. Where it was
once necessary to design each gasket for
each specific application, today a single
material can meet all specifications –
with the advantage that the sealing
properties can be exactly defined and
calculated. The universal deployability
of NOVAFLON® 300 flat gaskets
also simplifies inventory management,
handling and procurement.
NOVAFLON® 300 PTFE flat gaskets in
the field of energy supply
Valorec’s energy supply services encompass the operation, maintenance and
repair of various systems. All flange couplings and connections to fittings and
pumps of the various circuits must be
sealed reliably and enduringly. To reduce
breakdown risk to an absolute minimum,
only high-quality products are used.
Conduit systems
The NOVAFLON® 300 PTFE flat gasket
from Angst + Pfister is used in supply
systems with the following fluids:
• steam with pressures of up to 15 bars
for heating systems for manufacturing
operations
• condensate that is drained off and
also used as a heat transfer medium
• factory waste water used to cool heat
exchangers
• deionized water for laboratories
• drinking water
• waste water
• controlled compressed air for the
regulation of valves
• nitrogen to overlay products in
production
• ethylene glycol for refrigeration in
production operations
With all of these operational fluids, the
PTFE flat gasket material NOVAFLON®
300 has proven itself and performed
flawlessly in actual operation. Moreover,
its reliability is not impaired by aggressive fluids.
Special properties of:
NOVAFLON® 300
• PTFE modified with silicate
• brown color
• universal sealing material for the
processing industry
• high mechanical resistance for
pressures up to 83 bars
• good temperature properties with
minimum creep propensity
• density of 2.1 g/cm3
Flat or customized gasket contours
NOVAFLON® 200
• PTFE modified with barium sulfate
• white color
• best chemical resistance against
strong alkalis
• high mechanical resistance for
pressures up to 83 bars
• sterile enough for use in the food and
pharmaceutical industries
• density of 2.9 g/cm3
Take advantage of our experience and
extensive range of products. Request
technical advice or order our documentation on flat gaskets.
Valve station
Other types of NOVAFLON®
NOVAFLON® 100
• PTFE modified with hollow glass
microspheres
• light blue color
• highly compressible
• suitable for tension-sensitive coupling
materials such as glass, ceramic
and plastic flanges
• excellent adaptability
• density of 1.7 g/cm3
• material thicknesses:
1.0/1.5/2.0/3.0 mm in stock
• flat formats:
1 200 x 1 200 mm (1.0 mm thick)
1 500 x 1 500 mm (thickness of
1.5 mm and up)
• Thanks to our own stamping shop with
its efficient automatic punching systems, HF cutters and water jet cutters,
any customized gasket contour can be
delivered.
NOVAFLON® is a registered trademark
of Frenzelit-Werke GmbH & Co. KG.
24
25
Accurate and repeatable positioning
Salvatore Scicchitani, Senior Engineer
Brevetti C.E.A. SpA in Sovizzo
in the Italian province of
Vicenza has been a leader on
the world market since 1957
in the area of planning and
building inspection equipment
systems for the pharmaceutical industry. The company
uses PUR timing belts from
Angst + Pfister as transport elements in their systems, which
can automatically inspect several thousand test tubes, ampoules or syringes per hour.
Precision and repeat accuracy
of positioning were the deciding criteria in the company’s
selection of the timing belts.
For around 50 years, Brevetti C.E.A.
SpA has been designing and building
inspection and analysis systems for
products filled into test tubes, ampoules
and syringes primarily for the pharmaceutical sector, but also for other application areas. These high-performance
systems are capable of inspecting several thousand containers per hour and
meet stringent specifications with regard
to repeat accuracy and precision of
positioning. In order to meet the systems’
productivity and reliability specifications,
BRECO® ATN10 and ATN12.7 timing
belts were selected to move the workpiece holders.
The BRECO® ATN timing belt from the
Angst + Pfister assortment is part of a
modular assembly system that, in addition to the timing belt, also contains fastening elements and carriers or profiles.
The timing belt was specially developed
for synchronized transmission of movement in transport technology. It has a
trapezoid-shaped tooth profile and a belt
made of a polyurethane mixture with a
hardness of 90 ShA, as well as cords
made of high-strength steel braids. The
BRECO® ATN timing belt, which is
unique on the market, has an integrated
carrier connection and is delivered with
factory-prepared mounting holes in the
belt teeth for attachment of the carriers.
They permit quick installation and replacement of application-specific carriers.
The solution developed for Brevetti
C.E.A. comprises BRECO® timing belts
for pure transport purposes, a BRECO®
50ATN 12.7 timing belt that replaces
the earlier version with a welded-on carrier, and a BRECO® 50ATN10 timing
belt for the removal of products. Both
ATN types can be delivered welded to
the desired length. To facilitate the installation and removal of the belt in the
system, it is also possible to close the
ATN timing belt loop with the specially
developed ATN timing belt closure.
Advantages of BRECO® ATN timing
belts:
Of the numerous advantages of
BRECO® ATN timing belts, the following
merit special mention:
• variable and extremely precise
carrier spacing
• carriers made of various materials
such as plastic, metal or ceramics
can be used
• high shear resistance
• fast and easy carrier switching when
changing transported goods or
during maintenance work
• possibility of carrier switching
without removing the timing belt
• alternative solution to conveyor
chains with all the advantages of a
timing belt
• carriers adjust themselves during
installation
• standard belt pulleys can be used
• various mounting options
Carrier assembly scheme
Economic benefits:
• extremely short machine standstill
times when replacing carriers
• short changeover times due to easy
replacement of carriers
• minimum spare-part and installation
costs
• widely available standard belts, also
available in various versions
The standard BRECO® ATN timing belt
version consists of four main elements:
the PUR timing belt with holes drilled in
the teeth at precisely defined spacing in
which the carriers are mounted, the rigid
threaded inserts, fastening screws and
suitable carriers for the specific application.
The modular BRECO® ATN timing belt
system designed to meet the highest requirements provides much greater flexibility compared to other types of synchronized movement transport systems such
as timing belts with welded-on carriers,
chain conveyor belts with disks, or conveyor belts with glued on carriers. With
regard to reliability and the rigidity required for precision positioning, the
BRECO® ATN timing belt system exceeds
all specifications of even the most advanced synchronized transport systems.
Moreover, it is economical and easy to
employ. Make use of these impressive
advantages. We will gladly advise you.
Or use the reply card to order our documentation on BRECO® timing belts.
This machine form Brevetti C.E.A. insects and analyzes
pharmaceutical products.
Schematic depiction of transport unit constructed using BRECO® timing bel
26
BRECO® is a registered trademark of
Breco Antriebstechnik Breher GmbH + Co.
27
High-performance plastics
for fast machines
Carlo Contardi, Product Application Engineer
When designing filling machines and dosage systems
for food and beverages, demanding production parameters such as high filling speeds
must be met, and the materials selected must comply with
stringent food safety norms.
F.B.L. FOOD MACHINERY SRL,
a specialist in the development
and manufacture of filling
machines for foods, therefore
uses the high-performance
plastics ERTALON®, ERTALYTE®
and TECHTRON® from the
Angst + Pfister assortment.
With a staff of around 20 employees,
F.B.L. FOOD MACHINERY SRL in Sala
Baganza, Italy, develops and manufactures special machines that fill foods into
a wide variety of glass and metal containers. The company is successfully
keeping pace with the ever-increasing
demands of its local and international
customers. Enhancing productivity by
continually increasing filling speeds is
always the highest priority.
Highly stressed components
Complet view of dosage assembly
Delivering the desired productivity gains
poses challenging tasks for the design
engineers. For example, at higher cadence rates, the components of the
dosage assembly in the upper section of
the machines are subjected to particularly high stress. Rollers and moving parts
are especially affected. The product is
fed through the top of the machine into
the dosage assembly, which then presses
it automatically into the containers with
Ingenious material selection
Friction wheel of the dosage assembly
the aid of the friction wheel acting upon
a cam from the outside. This process is
performed in sync with the movement of
the bottles or cans to be filled in the production circuit. Since the high operating
speeds subjected the moveable components made of recycled plastic in the
dosage assembly to enormous wear and
tear, the engineers at F.B.L. FOOD
MACHINERY sought out a new solution,
which was found in close cooperation
with the plastics technology specialists at
Angst + Pfister.
Critical components of the dosage
assembly are now manufactured using
high-grade technical plastics or highperformance plastics from the
Angst + Pfister catalog. For instance,
the calender roller of the piston is made
of ERTALON® 66 GF30 to significantly
reduce wear and at the same time to
increase roll friction. ERTALYTE® TX was
selected as the material for the piston
slideway of the spacer. This selection
resulted in a vast improvement of the
sliding action, with a lowered coefficient
of friction as well as increased wear
resistance.
For the material to be used for the
sliding block spacer on machines that for
hygienic reasons – especially in the
upper sections where the dosage device
is located – need to be cleaned with
aggressive chemicals, the specialists at
Angst + Pfister recommended the
tribological high-performance plastic
TECHTRON® HPV PPS. TECHTRON®
HPV PPS is a hydrolysisresistant material
with excellent chemical resistance suitable for sliding applications requiring a
low coefficient of friction.
The positive experiences so far confirm
the correctness of the material selection.
The excellent characteristics of the employed plastics listed below are utilized
to their full potential in this application.
Make use of our experience when it
comes to finding solutions for applications in plastics technology. Order our
specialized Technical Plastics catalog,
or consult with one of our specialists.
Predestined for tribological applications
ERTALON® 66 GF30
(calender roller of the piston)
• high mechanical sturdiness
• high wear resistance
• high stability of shape
• optimal kinetic friction on the roll
surfaces
ERTALYTE® TX
(piston slideway spacer)
• very low kinetic coefficient of friction
• low stick-slip tendencies
• high wear resistance
• good stability of shape
TECHTRON® HPV PPS
(sliding block spacer)
• excellent friction and wear behavior
• very good resistance to chemicals
• excellent hydrolysis resistance
• exceptional stability of shape
• high temperature resistance
ERTALON®, ERTALYTE® and TECHTRON® are registered
trademarks of Quadrant AG.
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Quick-acting couplings – plain and simple
Heinz Birmele, Senior Engineer
For conventional applications
as well as for new construction concepts, Angst + Pfister
offers an extensive assortment
of quick-acting couplings.
Conformity to international
standards and guidelines as
well as the realities of the
market are decisive factors in
selecting the appropriate type
of coupling for your purposes.
The following article on these
important aspects also aims
to clarify the sometimes confusing terminology used with
regard to couplings.
For new applications, the choice often
goes to flat-sealing, ecological hydraulic
couplings. Particularly in sensitive areas,
this solution has a bearing on safety and
is expressly demanded by customers.
However, demand for replacement
parts in existing constructions primarily
requires interchangeability. In many
cases, a simpler construction architecture
creates advantages.
Construction principle and standardization
Flat sealing
Flat-sealing quick-acting couplings are
designed to be practically free of dead
space, as is the case with FLAT-STAR®
couplings. They conform to the ISO
16028 standard and reliably retain
fluids during coupling and decoupling,
thus preventing any dripping. The US
Hydraulic Tool Manufacturers Association (HTMA) and the National Fluid Power
Association (NFPA) issue performance
and interchangeability recommendations
for only a few sizes and pressure levels.
How relevant the recommendations are
has to be clarified case by case.
Conventional sealing
The self-closing valve integrated in a jack
and sleeve consists of a ball in the simplest case. The version with seat valve
and flexible gasket offers sealing advantages, particularly at low pressures.
Interchangeability and performance
specifications are standardized under
ISO 7241-1. Series A of this standard
is used predominantly in Europe, and
series B pertains primarily to couplings
in the USA.
Dimensions
The performance specifications of quickacting couplings are determined in conjunction with their dimensions.
• Size
The term size is a standard today for
dimensions independent of the
connection (with or without thread):
– according to ISO 16028 for
flat-sealing couplings
– according to ISO 7241-2 for
conventional sealing couplings
• Nominal flow capacity
Dimension-dependent reference value
measured according to ISO 7241-2.
• Pressure loss at nominal flow capacity
Pressure difference between entry and
exit measured according to
ISO 7241-2.
• Test flow capacity
Maximum flow rate according to
ISO 7241-2.
Pressure designations
• Nominal width
Comparative designation that is mostly identical to the effective diameter.
• Effective diameter
This measurement used for quick comparison of flow rates corresponds to
the diameter derived from the smallest
flow-rate cross section. We recommend consulting the pressure loss
diagram, which also takes the
construction-dependent properties of
the coupling into consideration.
The operating and nominal pressures of
uncoupled sleeves and jacks are relatively low. Uncoupled parts of the coupling
should normally not be under pressure
because they cannot replace a stop
valve.
Conventionally sealing jack and sleeve
• Nominal pressure coupled and
uncoupled
Values according to ISO 4399 with
safety margin four times greater than
bursting pressure.
Flat-sealing jack and sleeve
Flow capacity and loss of pressure
As a selection criterion, use either the
nominal values according to the standards or the specifications according to
the pressure loss diagram.
• Maximum operating pressure coupled
and uncoupled
Peak pressure with safety margin three
times greater than bursting pressure.
Conclusion
• Residual pressure
Residual pressure means the pressure
that remains in the system or, for example, the pressure generated by the
heat expansion of the fluid. It greatly
increases the required coupling force
and is reduced by means of an integrated pressure relief valve during the
coupling process.
The more you know about the actual operating conditions, the more accurately
you can select a quick-acting coupling
with regard to its suitability in practical
use. The explanations above are not
exhaustive. Other design parameters
such as number of cycles, pulse checks,
weight, leakage, air enclosure while
coupling, operating temperature and
throughput fluid are not mentioned here.
Actuation force
Order our “Quick-Acting Couplings”
catalog or talk to our specialists about
your coupling needs. We would be happy to advise you, in our offices or onsite
at your premises.
• Coupling force
Coupling force of quick-acting couplings is the axial force required for
the coupling process. For screw couplings, torque is also specified.
• Decoupling force
Decoupling force of quick-acting couplings is the axial force during the
pressureless decoupling process; for
screw couplings it corresponds to the
torque. Decoupling under pressure
must absolutely be avoided because
uncontrolled pressure surges can
cause damage.
FLAT-STAR® is a registered trademark of Angst + Pfister AG.
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