| 摘要 |
PURPOSE: To prevent the leakage of gas to a general part other than the thick- walled part of a molding. CONSTITUTION: A needle 11 is provided to the tip of a gas nozzle 5 possible to advance and retreat. After the injection of a resin material W into a cavity 4 is completed, the needle 11 is inserted in the resin material W up to the part having to become a hollow part 8 in the thick-walled part 7 of the resin material W. Inert gas is directly introduced into the resin material W from the needle 11 to form the hollow part 8. |
