| 摘要 |
PURPOSE:To enable the easy manufacture of a sealing device by providing a sectional pattern forming a part of the molded surface of a lower mold opposite to an upper mold and supporting the internal surface of a reinforcement ring, and connecting a pushup pin to the lower surface of the sectional pattern. CONSTITUTION:A lower mold 1 opposite to an upper mold 2 is provided with a circular sectional pattern 3 forming a part of the molded surface of ring 'H'. Under the lower end of a pushup pin 9 with the upper end thereof fixed to the lower surface of the sectional pattern 3 is arranged a pushup function device 12 for pushing up said pin 9 against the elastic force of a spring 11. According to the aforesaid constitution, not only a seal can be released from the lower mold 1 easily, but also the damage of the molds 1 and 2 and the occurrence of a burr can be prevented by simply pushing up said pin 9 with the pushup function device 12 after the completion of molding the seal. |
