| 摘要 |
PURPOSE:To execute effective degasification at the time of the secondary molding, by forming a recessed part so as to turn to the case inside surface side, on the case body part which faces in the vicinity of the final packing part of the molding resin of a window part. CONSTITUTION:A degasifying passage 13 is formed in the final packing part of a molding resin in a secondary molding cavity 7 of a window part 2, and from the degasifying passage 13, gas in the secondary molding cavity 7 passes through to the outside of a metallic mold. Therefore, the gas corrosion of the metallic mold part which faces the final packing part of the resin can be prevented, and the durability of the metallic mold is improved. On a case 1 which has been formed, a recessed part 12 is formed in a case body part 1a which faces in the vicinity of the final packing part of the forming resin of the window part 2, and a burr is generated in this recessed part 12. However, since the recessed part 12 is formed in the case inside surface side, it does not become a problem in its external appearance, and also, since the burr is held in the recessed part 12, it does not obstruct running of a tape, and also it is advantageous in respect of a function, as well. |
