JPS5757633A - Plastic lens blank and control of heat compression of the same - Google Patents

Plastic lens blank and control of heat compression of the same

Info

Publication number
JPS5757633A
JPS5757633A JP13158980A JP13158980A JPS5757633A JP S5757633 A JPS5757633 A JP S5757633A JP 13158980 A JP13158980 A JP 13158980A JP 13158980 A JP13158980 A JP 13158980A JP S5757633 A JPS5757633 A JP S5757633A
Authority
JP
Japan
Prior art keywords
lens blank
metallic mold
plastic lens
millimeters
temperature
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.)
Granted
Application number
JP13158980A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6210177B2 (enrdf_load_stackoverflow
Inventor
Masao Takagi
Kiyoshi Wada
Toshiji Sakuma
Hisashi Nichibe
Seiichiro Shimomura
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 JP13158980A priority Critical patent/JPS5757633A/ja
Publication of JPS5757633A publication Critical patent/JPS5757633A/ja
Publication of JPS6210177B2 publication Critical patent/JPS6210177B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Moulds For Moulding Plastics Or The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
JP13158980A 1980-09-24 1980-09-24 Plastic lens blank and control of heat compression of the same Granted JPS5757633A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13158980A JPS5757633A (en) 1980-09-24 1980-09-24 Plastic lens blank and control of heat compression of the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13158980A JPS5757633A (en) 1980-09-24 1980-09-24 Plastic lens blank and control of heat compression of the same

Publications (2)

Publication Number Publication Date
JPS5757633A true JPS5757633A (en) 1982-04-06
JPS6210177B2 JPS6210177B2 (enrdf_load_stackoverflow) 1987-03-04

Family

ID=15061579

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13158980A Granted JPS5757633A (en) 1980-09-24 1980-09-24 Plastic lens blank and control of heat compression of the same

Country Status (1)

Country Link
JP (1) JPS5757633A (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0157967U (enrdf_load_stackoverflow) * 1987-10-06 1989-04-11

Also Published As

Publication number Publication date
JPS6210177B2 (enrdf_load_stackoverflow) 1987-03-04

Similar Documents

Publication Publication Date Title
IL58455A0 (en) Method of rate controlled dirctional solidication of a metal casting and the article obtained thereby
AU7428081A (en) Hot sprue valve
WO1979000235A1 (en) Metal die for injection moulding
CA2226217A1 (en) Improvements in or relating to the manufacture of extrusion dies
JPS5762820A (en) Method of secondary operation for metallic product
JPS5757633A (en) Plastic lens blank and control of heat compression of the same
JPS55139534A (en) Method of molding pad for disk brake
JPS52109416A (en) Control method for cooling temperature of sintered ore
JPS5650772A (en) Metal mold unit for molten metal forging
JPS53127559A (en) Molding of bent pipe
JPS56113998A (en) Heat conducting pipe
ES240889U (es) Un piston perfeccionado para freno de disco.
JPS579805A (en) Metallic mold for sintering
JPS5614066A (en) Casting metal mold
JPS5277738A (en) Production of plastic lenticular lens
JPS55113803A (en) Production of magnetic material
JPS5780035A (en) Injection molding metal die for manufacturing light transmitter
JPS574751A (en) Method and apparatus for molding cylindrical product
JPS5689536A (en) Mold for compression molding of undercut form
JPS55164137A (en) Molding method for flexible diaphragm
JPS57159224A (en) Plastic working method for metal
JPS5557438A (en) Mold device
Excell Toolmaking in the fast lane
JPS5353799A (en) Manufacturing process of magnetic materials
JPS55122635A (en) Coupling method of metal member