MOLD FOR INJECTION MOLDING AND ITS MOLDED ARTICLE

摘要

PROBLEM TO BE SOLVED: To provide a mold for injection molding by which low pressure molding is possible and coming off of a rib and a sink mark on a thick part are not generated, and gate cutting by a separate process is unnecessary. SOLUTION: Net channels 5 are formed in a top mold 1 and/or a bottom mold 2 in the longitudinal and/or the transverse direction. A flow path channels 3 each with a large diameter or a wide width are formed on the net channels 5 in the top mold 1 and/or the bottom mold 2 so as to facilitate inflow of a molten resin. In at least one pinpoint gate 11 arranged on the flow path channel 3 for feeding the molten resin into a mold, the gate diameter is formed at least 1.5ϕto meet the shape and the size of a plastic product. Frame body channels 4 formed so as to surround the net channels 5 are constituted in the top mold 1 and/or the bottom mold 2.