During the research project the influence of the injection molding process on the bond strength of liquid silicone rubber (LSR) to thermoplastics is investigated. For this purpose, the mechanisms that are decisive for the bond strength will first be described and implemented in an empirical formula. Thus, already during the design phase the right material should be selected and the achievable bond strength should be specified.

The established model shall then be verified. For this purpose, an injection mold is to be designed and built that can process both materials and allows a detailed investigation. Especially the temperature control has to be considered more closely, since both materials are processed at very different mould temperatures. For this purpose a novel temperature control system based on a thick film heating element will be used. With this heating element, the temperature can be changed quickly, selectively and also during the injection molding process.

Duration: March 2019 - December 2021
project partners: Wilhelm Weber GmbH & Co. KG
funding sign: ZF4166302DN8
Project Management Agency: AiF Projekt GmbH, ZIM-Cooperation Projects
Contact persons: Prof. Dr.-Ing. Matthias Deckert, Dennis Mayer, M.Eng.