ハイブリッド射出成形における成形条件がインサート材と射出材の界面接着性に及ぼす影響に関する研究

抄録

Hybridizations of materials or molding methods are effective tools as high-speed and low-cost molding technologies of CFRTP, and a hybrid injection molding system is one of them. This study investigated the influence of molding conditions in the hybrid injection molding on the interfacial adhesion between inserted material and injection-molded material by using temperature and pressure sensors in the mold. It was found that “temperature rise of the injection-resin”, “increase in the injection rate” and “pre-heating of the insert-material” are effective for improving the interfacial adhesion. Regarding the improvement of the interfacial adhesion due to “temperature rise of the injection-resin” and “increase in the injection rate”, the rise in the interface temperature during adhesion had a dominant influence on the adhesion. On the other hand, the pressure did not contribute to the interfacial adhesion. Moreover, it was assumed that “pre-heating of the insert-material” improves the adhesion with anchor effect due to roughening of the insert-material surface by heating.