JPS5772810A - Production of precise metal mold - Google Patents

Production of precise metal mold

Info

Publication number
JPS5772810A
JPS5772810A JP14857880A JP14857880A JPS5772810A JP S5772810 A JPS5772810 A JP S5772810A JP 14857880 A JP14857880 A JP 14857880A JP 14857880 A JP14857880 A JP 14857880A JP S5772810 A JPS5772810 A JP S5772810A
Authority
JP
Japan
Prior art keywords
mold
cavity
molded article
transfer
electroformed
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
JP14857880A
Other languages
Japanese (ja)
Inventor
Tadashi Kato
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.)
Ricoh Co Ltd
Original Assignee
Ricoh Co 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP14857880A priority Critical patent/JPS5772810A/en
Publication of JPS5772810A publication Critical patent/JPS5772810A/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
    • 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
    • B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
    • B29C37/005—Compensating volume or shape change during moulding, in general
    • 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
    • B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
    • B29C33/3842—Manufacturing moulds, e.g. shaping the mould surface by machining
    • B29C33/3857—Manufacturing moulds, e.g. shaping the mould surface by machining by making impressions of one or more parts of models, e.g. shaped articles and including possible subsequent assembly of the parts
    • B29C33/3878—Manufacturing moulds, e.g. shaping the mould surface by machining by making impressions of one or more parts of models, e.g. shaped articles and including possible subsequent assembly of the parts used as masters for making successive impressions
    • 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

Landscapes

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

Abstract

PURPOSE: To obtain an accurately molded article by a method wherein a mold with a cavity being enlarged by such an amount as to exactly compensate for the size reduction arising from shinkage is obtained by producing an electroformed transfer metal mold for a plurality of times using a molded article whichis prepared by a standard metal mold, in the case of molding a camera prism.
CONSTITUTION: A molded article 11 having surfaces deformed as indicated by dotted lines is produced by an ordinary molding method while using the standard mold 9 which has a cavity 8 intended for the desired final shape of a pengagonal roof prism 1. By using the molded article 11 in electroforming, the electroformed transfer molds 14, 15 are poduced with a precision of the order of one micron or less, with an extremely thin spacer 16 provided at a cemtral part to enable the transfer molds 14, 15 to be split after electroforming. Then, the metal molds 14, 15 are separated, inverted and each of which is fitted with respective support pieces to constitute a master form. By using the master form, the second electroformed transfer mold 19 is produced, and by using the second tansfer mold 19, a mold 22 with a cavity 21 larger than the cavity 8 by such an amount as to exactly compensate for the size reduction arising form shrinkage can be obtained.
COPYRIGHT: (C)1982,JPO&Japio
JP14857880A 1980-10-23 1980-10-23 Production of precise metal mold Pending JPS5772810A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14857880A JPS5772810A (en) 1980-10-23 1980-10-23 Production of precise metal mold

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14857880A JPS5772810A (en) 1980-10-23 1980-10-23 Production of precise metal mold

Publications (1)

Publication Number Publication Date
JPS5772810A true JPS5772810A (en) 1982-05-07

Family

ID=15455870

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14857880A Pending JPS5772810A (en) 1980-10-23 1980-10-23 Production of precise metal mold

Country Status (1)

Country Link
JP (1) JPS5772810A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS622219A (en) * 1985-06-28 1987-01-08 Hitachi Ltd Lens barrel
NL1008799C2 (en) * 1998-04-02 1999-10-05 Pacific Basin Technoplating B Molding method for making e.g. motor vehicle door armrests
NL1008800C2 (en) * 1998-04-02 1999-10-05 Pacific Basin Technoplating B Mold assembly for making e.g. motor vehicle armrests
CN114734213A (en) * 2022-06-10 2022-07-12 眉山博雅新材料股份有限公司 A mold processing method and system thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS622219A (en) * 1985-06-28 1987-01-08 Hitachi Ltd Lens barrel
NL1008799C2 (en) * 1998-04-02 1999-10-05 Pacific Basin Technoplating B Molding method for making e.g. motor vehicle door armrests
NL1008800C2 (en) * 1998-04-02 1999-10-05 Pacific Basin Technoplating B Mold assembly for making e.g. motor vehicle armrests
CN114734213A (en) * 2022-06-10 2022-07-12 眉山博雅新材料股份有限公司 A mold processing method and system thereof

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