PROCESSES FOR PRODUCTION OF PLASTIC LENSES, GASKET FOR MOLDING PLASTIC LENSES, MOLDS FOR MOLDING PLASTIC LENSES, INJECTION JIG FOR THE RAW MATERIAL FLUID OF PLASTIC LENSES, HOLDING FIXTURE FOR THE MOLDS FOR PLASTIC LENSES, AND PRODUCTION UNIT FOR PLASTIC LENSES

摘要

A process for the production of plastic lenses which comprises mixing polymerizable components and injecting the mixture immediately after the mixing into a mold whose cavity is filled with carbon dioxide, and polymerizing the mixture; a process for the production of plastic lenses which comprises injecting a raw material fluid of plastic lenses flowing from the opening of an injection jig, part of which fluid enters the passageway of an injection pipe and the other part of which fluid runs off, into a mold and curing the fluid; a gasket for molding plastic lenses in which the injection pipe has an opening of the injection passageway at the end and a tilt around the opening; a process for the production of plastic lenses which comprises injecting a raw material fluid of plastic lenses into a mold held by a holding fixture having an injection pipe holding part and a passageway-sealing part and curing the fluid; and a holding fixture for holding the molds for molding plastic lenses.