JPS57202944A - Production of mold for injection molding - Google Patents

Production of mold for injection molding

Info

Publication number
JPS57202944A
JPS57202944A JP8812581A JP8812581A JPS57202944A JP S57202944 A JPS57202944 A JP S57202944A JP 8812581 A JP8812581 A JP 8812581A JP 8812581 A JP8812581 A JP 8812581A JP S57202944 A JPS57202944 A JP S57202944A
Authority
JP
Japan
Prior art keywords
mold
master
pattern
injection molding
molding
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
JP8812581A
Other languages
Japanese (ja)
Inventor
Takami Sugawara
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 JP8812581A priority Critical patent/JPS57202944A/en
Publication of JPS57202944A publication Critical patent/JPS57202944A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/06—Permanent moulds for shaped castings

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

PURPOSE:To obtain a mold for injection molding which generates scarcely casting defects with simplified stages by manufacturing a hollow mold and a metallic master from a wooden pattern which is treated to have heat resistance, and manufacturing a front mold and a movable half by using said metallic master. CONSTITUTION:A heat resistant surface treatment is applied on the surface of a wooden pattern 2 of the same shape as the surface shape of a molding by using urethane paint or the like. A hollow mold 8 is made directly by using such pattern 2. Molten cast iron is cast into the mold 8 to make a metallic master 10. This master 10 is turned over, and a stationary fitting mold 5 is manufactured by casting under heating. The master 10 is copied in accordance with the pattern 2 to turn away the metal corresponding to the thickness (t) of the molding, whereby a movable fitting mold is obtained. Both molds 5, 9 are combined, and a molten plastic material is forced into the cavities thereof, whereby an injection molding is obtained.
JP8812581A 1981-06-10 1981-06-10 Production of mold for injection molding Pending JPS57202944A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8812581A JPS57202944A (en) 1981-06-10 1981-06-10 Production of mold for injection molding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8812581A JPS57202944A (en) 1981-06-10 1981-06-10 Production of mold for injection molding

Publications (1)

Publication Number Publication Date
JPS57202944A true JPS57202944A (en) 1982-12-13

Family

ID=13934183

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8812581A Pending JPS57202944A (en) 1981-06-10 1981-06-10 Production of mold for injection molding

Country Status (1)

Country Link
JP (1) JPS57202944A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5194418A (en) * 1975-02-18 1976-08-19 Nakago oyobi shugatanozokeihoho

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5194418A (en) * 1975-02-18 1976-08-19 Nakago oyobi shugatanozokeihoho

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