JPS56164835A - Mold of reaction type injection molding - Google Patents

Mold of reaction type injection molding

Info

Publication number
JPS56164835A
JPS56164835A JP6889080A JP6889080A JPS56164835A JP S56164835 A JPS56164835 A JP S56164835A JP 6889080 A JP6889080 A JP 6889080A JP 6889080 A JP6889080 A JP 6889080A JP S56164835 A JPS56164835 A JP S56164835A
Authority
JP
Japan
Prior art keywords
mold
parts
corner parts
sharp corner
thermal conductivity
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
JP6889080A
Other languages
Japanese (ja)
Other versions
JPS613644B2 (en
Inventor
Kenichi Waratani
Shozo Nakamura
Masao Goto
Ataru Yokono
Masayoshi Aoki
Katsuo Shibata
Reiji Naka
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 JP6889080A priority Critical patent/JPS56164835A/en
Publication of JPS56164835A publication Critical patent/JPS56164835A/en
Publication of JPS613644B2 publication Critical patent/JPS613644B2/ja
Granted legal-status Critical Current

Links

Classifications

    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/02—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means
    • 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
    • B29C45/26—Moulds
    • B29C45/37—Mould cavity walls, i.e. the inner surface forming the mould cavity, e.g. linings

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

PURPOSE:To form a uniform skin layer at corner parts of a molded article by a method wherein sharp corner parts of projecting parts of a mold cavity are composed of lining pieces made of a material having a thermal conductivity higher than that of the material constituting the main body of the mold. CONSTITUTION:An upper mold 1 and a lower mold 2 are made of machine structural carbon steel, while the lining pieces 8 made of an aluminum alloy having a thermal conductivity higher than that of said carbon steel are fixed at the sharp corner parts of the projecting parts 5a, 5b by setscrews. After injecting a molding material into the mold cavity 4, the corner parts are cooled by immediately circulating a coolant, e.g., water containing 25% of ethylene glycol through a heat transfer passage 9, whereby the diffusion of heat at these parts can be augmented. Accordingly, the skin layer having a high density and a large thickness can be formed at the sharp corner parts.
JP6889080A 1980-05-26 1980-05-26 Mold of reaction type injection molding Granted JPS56164835A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6889080A JPS56164835A (en) 1980-05-26 1980-05-26 Mold of reaction type injection molding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6889080A JPS56164835A (en) 1980-05-26 1980-05-26 Mold of reaction type injection molding

Publications (2)

Publication Number Publication Date
JPS56164835A true JPS56164835A (en) 1981-12-18
JPS613644B2 JPS613644B2 (en) 1986-02-03

Family

ID=13386694

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6889080A Granted JPS56164835A (en) 1980-05-26 1980-05-26 Mold of reaction type injection molding

Country Status (1)

Country Link
JP (1) JPS56164835A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03173619A (en) * 1990-11-02 1991-07-26 Hitachi Ltd Reaction injection molding
EP0530503A2 (en) * 1991-08-02 1993-03-10 Canon Kabushiki Kaisha Injection-molding metal mold and body molded by using the same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03173619A (en) * 1990-11-02 1991-07-26 Hitachi Ltd Reaction injection molding
JPH055645B2 (en) * 1990-11-02 1993-01-22 Hitachi Ltd
EP0530503A2 (en) * 1991-08-02 1993-03-10 Canon Kabushiki Kaisha Injection-molding metal mold and body molded by using the same
US5419697A (en) * 1991-08-02 1995-05-30 Canon Kabushiki Kaisha Precision injection-molding metal mold

Also Published As

Publication number Publication date
JPS613644B2 (en) 1986-02-03

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