BONDING STRENGTH IN MICRO INJECTION ASSEMBLY MOULDING

摘要

Polymer materials offer a wide range of properties that can be chosen according to the functional necessities. Therefore these materials are increasingly often used for decisive elements in micro systems. Injection molding as a production process for polymer materials can also be applied as a joining and assembly process in addition to generating micro parts. This approach offers a high potential for micro technology, since an offline joining process can be avoided by overmolding of the components, where it is possible to generate movable and force fit connections. New research at IKV (Institute of Plastics Processing) shows progress made in the attainable bond strength of hybrid micro systems. A specific testing method for different material combinations has been developed. Since plastics/metal bonds possess little adhesion, surface modifications such as increased surface roughness or silane coating show promising results.