| 摘要 |
PURPOSE:To reduce the molding cycle by providing a slide core in a mold to advance it into a cavity following the shrinkage of a molding material associated with the hardening thereof in the mold. CONSTITUTION:The first material liquid A and the second material liquid B are fed to a mixing head 10 to mix, then, injected into a cavity 8 and heated to cause a hardening reaction. In such a reactive injection molding of a nylon block copolymer, a slide core 3 is provided in a mold 1 and advanced into the cavity 8 following the shrinkage of a molding material caused with the proceeding of the hardening reaction thereof. Otherwise, a clearance may be generated in the cavity 8 and cause an insufficient heating of the molding material to delay the reaction. |
