Remform® - Improving process reliability with direct screw
fastenings into plastic
In view of the fact that for technical and economic reasons the
use of plastic materials is expanding, the need for a low-cost and
reliable fastening method becomes increasingly important.
This trend also places fresh demands on the screws used,
especially in the case of fibre-reinforced materials. This has
resulted in the development of new thread geometries that can
guarantee the necessary process-reliable fastening. Arnold
Umformtechnik has met this challenge with its Remform® screws for
plastic.
The asymmetric thread profile on the Arnold Remform® screw
optimises the material flow of the tapped plastic thread, because
the forces engendered during assembly are guided in the correct
direction by the asymmetric thread, and a complete guide thread is
achieved along the entire length of the screw.
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Radial forces when tapping with
asymmetric Remform flanks |
The Remform® screw achieves this improved material flow
because the front flank of the thread has a radius, and the
material can therefore penetrate to the maximum depth of the
diametral core, while the steeper side of the flank (pointing
towards the thread) permits much greater thread meshing due to
the fact that the material pushed longitudinally is picked up,
and this results in higher pull out resistance.
At the same time this Remform® thread geometry makes it
possible to further reduce the radial stress (which itself can
cause the hub to split). Very low thread tapping torques and
high failure torques provide users with a process-reliable
fastener. 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
Remform® from Arnold -
click here... |
