JPS57115321A - Annealing method for plastic lense - Google Patents

Annealing method for plastic lense

Info

Publication number
JPS57115321A
JPS57115321A JP27581A JP27581A JPS57115321A JP S57115321 A JPS57115321 A JP S57115321A JP 27581 A JP27581 A JP 27581A JP 27581 A JP27581 A JP 27581A JP S57115321 A JPS57115321 A JP S57115321A
Authority
JP
Japan
Prior art keywords
lense
mold
warm water
plastic
forming
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP27581A
Other languages
Japanese (ja)
Inventor
Seiichiro Shimomura
Hajime Inoue
Masao Takagi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP27581A priority Critical patent/JPS57115321A/en
Publication of JPS57115321A publication Critical patent/JPS57115321A/en
Pending legal-status Critical Current

Links

Landscapes

  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

PURPOSE: To anneal a lense without lowering lense quality and to reduce its forming cycle remarkably, by following process in which a plastic lense made by injection molding is precooled for short time in the forming metal-mold, and then is slowly cooled by dipping into warm water at the outside of the mold.
CONSTITUTION: For instance, an injection molded lense 1 at 230°C of resin temperature is left in the forming mold of 0W80°C and precooled for 3W5min. Consequently, the solidified layer 2 of the lense is formed. next, the lense, taken out from the metal mold is slowly cooled by warm water (preferably above 70°C) at the outside of the mold, thereby solidifying the lense 1. Further, in the case of cooling a thick lense with large diameter, a pair of plastic holding members 5 connected by fin like hinge 4 and composed of a portion covering periphery, cover the periphery portion 6 of the lense by folding it. Then the lense 1 is desirable to be dipped into the warm water.
COPYRIGHT: (C)1982,JPO&Japio
JP27581A 1981-01-07 1981-01-07 Annealing method for plastic lense Pending JPS57115321A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP27581A JPS57115321A (en) 1981-01-07 1981-01-07 Annealing method for plastic lense

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP27581A JPS57115321A (en) 1981-01-07 1981-01-07 Annealing method for plastic lense

Publications (1)

Publication Number Publication Date
JPS57115321A true JPS57115321A (en) 1982-07-17

Family

ID=11469346

Family Applications (1)

Application Number Title Priority Date Filing Date
JP27581A Pending JPS57115321A (en) 1981-01-07 1981-01-07 Annealing method for plastic lense

Country Status (1)

Country Link
JP (1) JPS57115321A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61132313A (en) * 1984-11-30 1986-06-19 Wakakichi Kogaku Kogyo Kk Manufacture of lens for spectacles
WO1993022130A1 (en) * 1992-04-27 1993-11-11 Kabushiki Kaisha Asahi Optical Method of correcting the shape of thermoset resin lens for spectacles and support tool for shape correction in said method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61132313A (en) * 1984-11-30 1986-06-19 Wakakichi Kogaku Kogyo Kk Manufacture of lens for spectacles
WO1993022130A1 (en) * 1992-04-27 1993-11-11 Kabushiki Kaisha Asahi Optical Method of correcting the shape of thermoset resin lens for spectacles and support tool for shape correction in said method

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