| 摘要 |
PURPOSE:To prevent a second molding material from leaking in a second step by forming a pressure contact member at the side of a movable mold opposed to the end for injection molding first and second molded pieces and/or its end in a first step. CONSTITUTION:In a first movable mold 53, pressure contact members 16 protruding inward from stepped parts 15 of the peripheral edges A of openings 11, 12, 13 protrude at a suitable interval to mold a protrusion bank 11A protruding in a mold opening direction near the boundary line of the parts 15 and a hard molded piece 10 molded with protruding banks 21B, 21B near the boundary line of the mounting sealing face 21. The piece 10 is cured and contracted so that the parts 15 tends to be separated from the face of the stationary mold, but when a reciprocating metal mold 54 is aligned to the mold 54 in a second step, the end of the member 16 is collapsed, and the outer peripheral edge of the opening of the hard member is brought into pressure contact with the face of the mold 51. Accordingly, even if soft plastics 30, 40 are injection-molded, it is not leaked but can manufacture a double molding synthetic resin molded piece having beautiful external appearance. |
