| 摘要 |
PURPOSE:To obtain an elastic molded product free from delamination by installing a cushioning part of an elastic material which has similar flexibility, heat resistance, and mold lubricity, within a required extent, to the elastic molded product on the mold surface facing the joint part between the elastic molded product and a joint body in the mold. CONSTITUTION:An elastic material is injected from an inlet 13 formed in an upper mold 12 into a cavity 14 formed among an upper and lower molds 11, 12, a core 13a-13f, and the end parts of a channel body 2, 2. When a piece body 3, as a joint body, is injection molded in a cavity part 14, glass run 1, which is free from delamination and flashes in joint P.L. part between the channel body 2, 2 and the piece body 3, is obtained in every case. Since the dispersion of a cross section shape at the end part of the elastic molded product is absorbed by a cushioning part, when the joint body is injection molded, the generation of delamination and flashes is prevented at the joint between the elastic molded product and joint body to obtain the molded product with high molding precision. |
