| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing advantageously from the economical point of view a fiber reinforced thermoplastic resin molded product having a hollow section and provided with the good outer appearance even at the time of not being coated, by utilizing the gas assist injection molding method. SOLUTION: When a molded product is manufactured by using a fiber reinforced thermoplastic resin composition in the gas assist injection method, the injection of molten resin is started while reducing the pressure to 1/2 atmospheric pressure or under in the state of closing a mold cavity, and in the middle of injection or after the completion of injection, a pressurized fluid is injected from a pressurized fluid injection device 11 into molten resin injected into a mold cavity to form a hollow section. |
