Self-Tapping Bushing for CRP and GRP
Rapid Joining of Fiber-Reinforced Plastics
Fiber-reinforced plastics are challenging materials, especially if they have to be joined or connected. Insertion of screws into a composite component runs the risk of delamination: individual layers of the composite can become detached or fibers torn out of the composite.
The Mebux LW (light weight) self-tapping bushing from IMS Verbindungstechnik GmbH & Co. KG, Neuenstein, Germany, can provide help. It features a special geometry that does not damage the part. As there is no risk of delamination of composite materials, it can be fitted into the part retroactively as a connecting element (i.e. not necessarily only during lamination). It can be countersunk completely in the part, and is thus suitable for closely spaced installation. Its flange permits it to be reliably positioned.
Reduction of Installation Time
The product, presented in July by the Baden-Württemberg Development Agency for Lightweighting, as part of its ThinKing event also reduces installation time, since the bushing is self-tapping and the thread-cutting step is eliminated. With its high return torque, it remains securely in the part even without adhesive bonding, since the bushing expands when a screw is inserted.
The threaded bushing was specially developed for use in composites. “To install it, you only need to bore a hole and then you can screw the bushing directly into the workpiece using an insertion tool,” explains Pascal Fischer, product manager at IMS. He says that, even without a special tool, the connecting element can also be reliably processed by machine and will even withstand continuous loading from frequent screwing and unscrewing.
IMS Verbindungstechnik GmbH & Co. KG GB Autoteile
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