| 摘要 |
PROBLEM TO BE SOLVED: To cheaply provide a gas nozzle simple in structure which can charge and discharge compressed gas safely. SOLUTION: The main body 35 of a needle 33 is inserted forward/backward moveably into a sleeve 15. When the compressed gas is charged into a molten resin in the cavity 7 of a mold 5 through a compressed gas passage 43 formed between the main body 35 and the sleeve 15, by making the compressed gas introduced from a compressed gas introduction pipe 31 into an adapter 21 act on the large-diameter head part 37 of the needle 33, the needle 33 is advanced toward the cavity 7. When the charge of the compressed gas is stopped, the needle 33 is retracted by the pressure of the compressed gas in the cavity 7.
|
