INJECTION MOLDING APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide an injection molding apparatus which has no possibility of leaving a trace of a gate on its teeth part side when a belt with teeth for transmitting a light load is integrally molded from an appropriate resin material. SOLUTION: A molding cavity for a belt with teeth is formed by making the first mold 32 and the second mold 52 cooperate with together. The first mold is relatively separable to the second mold so as to separate the belt with teeth after the belt with teeth is molded. A teeth part cavity for molding a teeth part of the belt with teeth is provided along the outer periphery side of the molding cavity and a plurality of gate openings 54B are spaced uniformly along the inner peripheral wall face of the molding cavity. When the belt with teeth is used, the belt with teeth is turned over so as to make the teeth part inside.