INJECTION MOLDING MACHINE OF OPTICAL PRODUCT AND INJECTION MOLDING METHOD OF OPTICAL PRODUCT

摘要

PPROBLEM TO BE SOLVED: To provide an injection molding machine of an optical product capable of improving light transmissivity at the time of irradiation of the optical product with light, and an injection molding method of the optical product, in the injection molding machine of the optical product plasticizing a resin material in a state that the pressure in the heating cylinder of an injection device is reduced and injecting the plasticized molten material in a mold to mold the optical product, and the injection molding method of the optical product. PSOLUTION: In the injection molding machine of the optical product plasticizing the resin material M in a state that the pressure in the heating cylinder 31 of the injection device 12 is reduced and injecting the plasticized molten material M1 in the mold 64 to mold the optical product, the heating cylinder 31 is kept always internally airtight to be sucked by a vacuum pump 54, and a degree of vacuum is set to 0.33-11.33 kPa to perform the plasticization of the resin material M. PCOPYRIGHT: (C)2010,JPO&INPIT