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Remform® – thread-forming screws for plastic for direct fastening
Finding a low cost screw for plastic parts that is both reliable
and suitable for the material is becoming increasingly important,
because for technical and economic reasons plastics are being
increasingly used in industry. And with this trend, the
requirements of thread-forming screws for fastening directly into
plastics have also increased. In particular, the use of
fibre-reinforced materials means that new types of thread
geometries are required to ensure process-reliability in assembly.
According to Thomas Jakob, Product Manager at Arnold Umfortechnik,
using Remform screws to fasten plastic materials is the most
cost-effective way of dealing with such a comprehensive challenge.
By using this type of fastener system, manufacturers can keep the
cost of both the assembly process and the fastener itself as low
as possible.
The asymmetrical thread flank profile on the Arnold Remform® screw
for plastics optimises the material flow on the plastic thread
formed.
This creates:
- high overtorques due to optimised material flow
- low tapping torques due to low volume displacement
- a wide window for ascertaining the tightening torque (high level
of assembly reliability)
- low radial tensions
- thin walled plastic tubes (~ 2xd)
- short plastic moulding cycle times
- high preload forces due to the extreme steepness of the load
flank.
- high level of component operating reliability (due to higher
clamping power)
- Remform screws have high load capacity due to strong thread core
cross-section
- high resistance to bending of thread flanks at high clamping
forces
- greater operating reliability when coordinating the load
capacity of the thread formed
in the plastic with the stability of the screw, while making optimum use
of the tightening
torques made possible by this means.
- high self-locking capacity in thread due to sloping angle of
approx. 8o, and lack of play
on the thread.
- low risk of Remform screw coming loose.
Over the years ARNOLD UMFORMTECHNIK, based in
Forchtenberg-Ernsbach in Germany, has become a leading development
partner in fastening technology. Its slogan means “solutions that
connect”. ARNOLD UMFORMTECHNIK works together with well-known
companies in the automotive and electronics industries. Every day
its over 450 employees work hard to develop and produce more than
15 million fasteners every day. Arnold is part of the Würth Group.
If you would like to receive further information about screws for
plastics from Arnold -
click here...
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