| 摘要 |
PURPOSE:To obtain a two-color monolithic item without having defects such as inverted blisters, by quickly delivering primarily molded items within either cavities or coes to a secondary molding side, successively followed by secondary molding. CONSTITUTION:When a lid and a body of a two-color compact are concurrently molded, after the injection is carried into the cavities of an injection molding die A to concurrently mold the primary items 5, 6, the die is rotated by an angle of 180 deg. with the primary items 5, 6 remained in the respective cores of the die so that they are positioned at secondary molding sides, then the dies are clamped, and a synthetic resin for secondary molding is injected around the primary items 5, 6 to be monolithically molded. As a result, inverted blisters a, b, c that have been being formed in the thick parts of the primary items 5, 6 are pressed and filled by internal pressure and melting heat when the injection is carried out for the secondary items 11, 12, and therefore products whose surfaces are smoothly shaped can be obtained.
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