| 摘要 |
PURPOSE:To prevent burrs from occurring, while a molded body is molded integrally with sealing material firmly by a method in which in the manufacture of the composite object made of a plastic molded object and elastic sealing material, a groove is molded on a sealing face, and the groove is made into a reverse taper-construction by pushing the edge part of the sealing face by the clamping force of a secondary mold, and then sealing material is poured thereinto. CONSTITUTION:A cavity 3 is formed with together a cavity mold 1 and a primary core mold 2, and the plastic molded body 4 in which a groove 6 is provided on its sealing face 5, is molded by injecting plastic material. In the state where the molded body 4 is left in the cavity 1, the mold is opened, and the primary core mold 2 is replaced by a secondary core mold 7, and then the mold is clamped. The inner wall 7a of the secondary core mold 7 is caused to taper to the depth direction of a cavity 8, and the mold clamping is achieved, while the inner wall 7a is brought in contact with the edge part of the sealing face 5 in mold clamping. The groove 6 is made into a reverse taper-construction by being pushed inside. Next, sealing material is poured into the cavity 8, and elastic sealing material is molded on the sealing face 5. |
