射出成形による樹脂/ 金属の接合技術とその接合メカニズム

抄録

Plastic and metal injection molding joining technology has various benefits such as obtaining high joiningstrength, reduction of number of process, and realization of the hybrid structure with a complex structure.The joining technologies recently reported to scientific journals were classified into “intermolecularinteraction on metal and resin interface（ e.g. covalent, hydrogen bond）”,“ contact area on metal and resinjoint plane（ e.g. surface micro-structuring）”, and“ mechanical constraint on metal and resin interface（ e.g.anchor effect）. Their reports were reviewed focusing on the effects of metal surface treatments and injectionmolding conditions on their joining strength and their mechanisms. Recent analytical technologies with directin-situ observation and monitoring physical condition inside the mold during injection molding were reviewedand injection molding conditions to obtain higher joining strength were indicated.The establishment of the standard ISO19095 series for plastic and metal injection joining was mentionedand their usefulness were emphasized. Objectively reliable plastic and metal injection joining technologieswould be brought by ISO 19095. The results showing shear and tensile joining strength more than 40MPa andexcellent durability have been reported, which would be brought by the mechanical constraint mechanismon metal and resin interface（ e.g. anchor effect）. Advances in the analysis of joining interface during moldingand mechanical fracture are expected to spread metal and resin injection molding joining technology to theindustry more widely.