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Patent Searching and Data


Title:
METHOD FOR MANUFACTURING LENS, RESIN STARTING MATERIAL USED THEREIN, AND LENS OBTAINED BY SAID MANUFACTURING METHOD
Document Type and Number:
WIPO Patent Application WO/2015/118667
Kind Code:
A1
Abstract:
 This method for manufacturing a lens comprises (i) a step for injection molding using a thermoplastic resin starting material and obtaining a lens precursor in an injection mold, and (ii) a step for arranging the lens precursor in a compression mold and compression-molding the lens precursor. When the lens precursor is moved from the injection molding of step (i) to the compression molding of step (ii), the lens precursor is removed from the injection mold when the center temperature of the lens precursor is equal to or greater than the intermediate-point glass transition temperature of the thermoplastic resin starting material.

Inventors:
DAIMATSU KAZUKI (JP)
FUTAMATA KEIGO (JP)
YAMAMOTO YOSHIHIRO (JP)
Application Number:
PCT/JP2014/052953
Publication Date:
August 13, 2015
Filing Date:
February 07, 2014
Export Citation:
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Assignee:
SUMITOMO CHEMICAL CO (JP)
SHIMADA PREC CO LTD (JP)
TOSHIBA MACHINE CO LTD (JP)
International Classes:
B29D11/00; B29C69/02
Foreign References:
JP2008230025A2008-10-02
JPH08336833A1996-12-24
JPH0931134A1997-02-04
Attorney, Agent or Firm:
SAMEJIMA, Mutsumi et al. (JP)
Mutsumi Sameshima (JP)
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