JPS5795431A - Temperature control for metallic mold of injection molding machine - Google Patents

Temperature control for metallic mold of injection molding machine

Info

Publication number
JPS5795431A
JPS5795431A JP17098380A JP17098380A JPS5795431A JP S5795431 A JPS5795431 A JP S5795431A JP 17098380 A JP17098380 A JP 17098380A JP 17098380 A JP17098380 A JP 17098380A JP S5795431 A JPS5795431 A JP S5795431A
Authority
JP
Japan
Prior art keywords
metallic mold
high temperature
resin
heat medium
over valve
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
JP17098380A
Other languages
Japanese (ja)
Inventor
Masao Takagi
Masamichi Takeshita
Masayuki Muranaka
Kiyoshi Wada
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 JP17098380A priority Critical patent/JPS5795431A/en
Publication of JPS5795431A publication Critical patent/JPS5795431A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00009—Production of simple or compound lenses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/72—Heating or cooling
    • B29C45/73—Heating or cooling of the mould
    • B29C45/7306—Control circuits therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2011/00—Optical elements, e.g. lenses, prisms
    • B29L2011/0016—Lenses

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

PURPOSE:To produce high precision, thick wall optical products without shrinkage and internal stress from highly viscous resin such as acrylic resin by cooling rapidly a metallic mold by means of a low temperature medium after injecting resin into the metallic mold that has been kept at high temperature by means of a high temperature heat medium. CONSTITUTION:A high temperature heat medium is supplied to a metallic mold 1 from a heating device 2 via an electromagnetic change-over valve 4A and an electromagnetic proportional flow rate valve 8 to keep the metallic mold at high temperature, and at the same time the high temperature heat medium is recovered to the heating device 2 through an electromagnetic change-over valve 4C. Next, highly viscous resin (for instance, acrylic, polycarbonate) is injected into the metallic mold 1 that is at high temperature, and at the same time the circuit of the high temperature heat medium is closed, and a cooling heat medium is supplied from a cooling device B into the metallic mold 1 through the electromagnetic change-over valve 8 to cool rapidly the metallic mold 1. The flow rate of the heat media is controlled by an electromagnetic change- over valve 8. Because the metallic mold 1 is kept warm for injection, the fluidity of resin is good, and because the resin is cooled rapidly, optical characteristics of the products are excellent.
JP17098380A 1980-12-05 1980-12-05 Temperature control for metallic mold of injection molding machine Pending JPS5795431A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17098380A JPS5795431A (en) 1980-12-05 1980-12-05 Temperature control for metallic mold of injection molding machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17098380A JPS5795431A (en) 1980-12-05 1980-12-05 Temperature control for metallic mold of injection molding machine

Publications (1)

Publication Number Publication Date
JPS5795431A true JPS5795431A (en) 1982-06-14

Family

ID=15914951

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17098380A Pending JPS5795431A (en) 1980-12-05 1980-12-05 Temperature control for metallic mold of injection molding machine

Country Status (1)

Country Link
JP (1) JPS5795431A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04105915A (en) * 1990-08-27 1992-04-07 Nissei Plastics Ind Co Temperature control method for injection molding machine
JPH04119814A (en) * 1990-09-10 1992-04-21 Nissei Plastics Ind Co Temperature control method of injection molding machine
US5656228A (en) * 1994-06-21 1997-08-12 Konica Corporation Injection molding method
WO2004016412A1 (en) * 2002-07-18 2004-02-26 Siemens Aktiengesellschaft Tempering device for a tool of an injection moulding machine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5363459A (en) * 1976-11-18 1978-06-06 Japan Steel Works Ltd Process and apparatus for mold temperature control

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5363459A (en) * 1976-11-18 1978-06-06 Japan Steel Works Ltd Process and apparatus for mold temperature control

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04105915A (en) * 1990-08-27 1992-04-07 Nissei Plastics Ind Co Temperature control method for injection molding machine
JPH04119814A (en) * 1990-09-10 1992-04-21 Nissei Plastics Ind Co Temperature control method of injection molding machine
US5656228A (en) * 1994-06-21 1997-08-12 Konica Corporation Injection molding method
DE19522361B4 (en) * 1994-06-21 2004-07-15 Konica Corp. injection molding
WO2004016412A1 (en) * 2002-07-18 2004-02-26 Siemens Aktiengesellschaft Tempering device for a tool of an injection moulding machine

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