| 摘要 |
PURPOSE:To obtain a high quality foamed and molded item with good productivity, by feeding a foamable compound in an amount up to the volume of a cavity, and filling the remaining space with a high pressure gas to keep a pressurized state so that excessive preceding foaming may be suppressed. CONSTITUTION:A foamable compound 2 is fed into a cavity 1 of a split mold so that a required expansion rate will be obtained, a rubber packing 4 is fitted in a packing groove 6, and while a high pressure air (about 10kg/cm<2>) is injected from introduction pipes 5, the mold is heated with the mold closed by a press. While excessive preceding foaming of the foamable compound is suppressed, the crosslinking is allowed to proceed to a certain extent, then the high pressure air is released, and the temperature is elevated with the mold closed by the press to complete the foaming and crosslinking. |
