| 摘要 |
PROBLEM TO BE SOLVED: To provide a system for economically executing an injection molding method capable of easily forming with good surface transferability by reducing a viscosity at a thermoplastic resin melting time. SOLUTION: The system for executing the injection molding method comprises the steps of melting a carbon dioxide in the thermoplastic resin, injecting the resin in a mold cavity pressurized by the carbon dioxide, and molding the resin. The system also comprises a carbon dioxide supply system 200 obtained by coupling a carbon dioxide source 4, a carbon dioxide booster 5 and a carbon dioxide supply unit 6 by supply passages 9 and 19. Thus, the supply unit 6, an injection cylinder 2, the mold cavity and a hopper 2 are coupled by supply passages 11 to 13. In the source 4 and the booster 5, the carbon dioxide is handled at lower than a critical temperature, and the carbon dioxide to be supplied from the unit 6 to the cylinder 2, the cavity and the hopper 2 is handled at a temperature exceeding the critical temperature.
|
