Patent ID: 9067344
Filing Date: 2015-06-30
Classification: B29C,B29D,B29L

Abstract:
1. A method of producing a plastic lens comprising: a mold assembly step in which a first mold and a second mold are caused to face each other, and outer peripheries of the first mold and the second mold are connected by a tape member to assemble a mold assembly having a cavity; an aid member attachment step in which an attachment provided around a first opening of an injection aid member having the first opening and a second opening connected to the first opening is firmly attached to the mold assembly, and the first opening is caused to face the tape member forming an outer periphery of the cavity; a through hole forming step in which a through hole is provided in a portion of the tape member opposed to the first opening; an injection step in which a nozzle is inserted through the second opening of the injection aid member into the cavity, and a plastic lens material is injected thereto such that the injected plastic lens material overflows from the cavity into an interior space of the injection aid member through the through hole and the through hole is completely filled with the overflowed plastic lens material; a sealing step in which the second opening of the injection aid member is sealed with a sealing member; and a polymerization step in which the plastic lens material injected to the cavity is polymerized in a state that the through hole is completely filled with the overflowed plastic lens material.