Structure and properties of polyacetal composite moldings in sandwich moldings with simultaneous composite injection molding (SCI. Molding) machine
Mizuno Wataru; Tomari Kiyotaka; Hamada Hiroyuki
Abstract:Polyacetal was combined with polyacetal, fiber reinforced polyacetal and fiber reinforced polycarbonate by a simultaneous composite injection molding (SCI. Molding) in which two different melts can be injected into one mold cavity simultaneously through two individually controlled channels. The structure and properties of polyacetal sandwich moldings were investigated as a function of molding conditions. Impact strength and mold shrinkage were strongly affected by the crystalline morphology of polyacetal. Bending properties and dimensional stability of the polyacetal composite moldings were improved by sandwich molding. Key Words:simukaneous composite injection molding, sandwich molding, polyacetal morphology, bending properties, dimensional stability