MOLDING METHOD OF SYNTHETIC RESIN INJECTION MOLDING AND INJECTION MOLDING MOLD DEVICE

摘要

PROBLEM TO BE SOLVED: To ensure degassing and prevent burning and short shots. SOLUTION: Two or more primary injection molding sections 1 are formed by injecting the first resin 10 into two or more cavity sections 8 for primary injection molding. A cavity section 13 for secondary injection molding making a slide core 7 retreat and extending between ends of the adjacent primary injection molding sections 1 is formed. The second resin 14 is injected into the cavity section 13 for secondary injection molding to form a secondary injection molding section 2, and superimposing parts 3b of the secondary injection molding section 2 on both sides are superimposed on and integrated with individual superimposing surfaces 12 of the adjacent primary injection molding sections 1. Tow or more gates 16 for secondary injection molding are formed about the center of the part of the mold section 6 located in the width direction and between the primary injection molding sections 1 adjacent with an interval and in the direction crossing the width direction at nearly right angles. A degassing section 9 is arranged in the part of the mold section 6 or the slide core 7 located at a position corresponding to a nearly middle point in the line linking gates 16 for adjacent secondary injection molding to degas. COPYRIGHT: (C)2007,JPO&INPIT