Title:
エピスルフィド系光学材料用モノマーのモールド自動注入方法
Document Type and Number:
Japanese Patent JP7077424
Kind Code:
B2
Abstract:
The present invention relates to a method for manufacturing an optical material by injecting episulfide-based monomer solution into a cavity formed between a pair of molds, the outer peripheries of which are sealed and, more particularly, to a method for automatically injecting an episulfide-based monomer for an optical material into a mold, wherein a vision recognition system is used while injecting episulfide-based monomer solution into the cavity such that a rated amount thereof can be injected within a short period of time. The present invention provides a method for automatically injecting an episulfide-based monomer for an optical material into a mold, the method comprising the steps of: (a) preparing episulfide-based monomer composition for an optical material having a solid-state refractive index of 1.650-1.820 and a viscosity of 15-900cps (25 DEG C); (b) injecting most of the monomer composition into a cavity formed between a pair of molds, the outer peripheries of which are sealed; and (c) sensing a fluid surface by using a vision recognition system while injecting the monomer composition into the cavity, following step (b), such that, if the fluid surface is sensed at aconfigured final injection point, injection of the monomer composition is ended. According to the present invention, a rated amount of episulfide-based monomer solution for an optical material can beautomatically injected into a mold such that the solution is neither insufficient nor overflows.
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Inventors:
Chang Dong Gyu
Kim Jun Seop
Kim Jun Seop
Application Number:
JP2020562685A
Publication Date:
May 30, 2022
Filing Date:
April 22, 2019
Export Citation:
Assignee:
Mitsui Chemicals, Inc.
International Classes:
B29C39/44; B29C39/02; B29C39/24; B29C39/26
Foreign References:
| WO2008108280A1 | ||||
| WO2013129460A1 |
Attorney, Agent or Firm:
Shinji Hayami