JPS5440863A - Mold for transfer molding - Google Patents

Mold for transfer molding

Info

Publication number
JPS5440863A
JPS5440863A JP10659277A JP10659277A JPS5440863A JP S5440863 A JPS5440863 A JP S5440863A JP 10659277 A JP10659277 A JP 10659277A JP 10659277 A JP10659277 A JP 10659277A JP S5440863 A JPS5440863 A JP S5440863A
Authority
JP
Japan
Prior art keywords
mold
transfer molding
iron metal
molds
mold resin
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
JP10659277A
Other languages
Japanese (ja)
Inventor
Hisashi Yoshida
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 JP10659277A priority Critical patent/JPS5440863A/en
Publication of JPS5440863A publication Critical patent/JPS5440863A/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/40—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using liquids, e.g. salt baths, liquid suspensions
    • C23C8/42—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using liquids, e.g. salt baths, liquid suspensions only one element being applied
    • C23C8/48—Nitriding
    • C23C8/50—Nitriding of ferrous surfaces
    • 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

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Encapsulation Of And Coatings For Semiconductor Or Solid State Devices (AREA)

Abstract

PURPOSE:Long-life molds for transfer molding with good releasability and high wearing resistance, which are prepared by nitriding the surface of molds made of iron metal. CONSTITUTION:Mold blocks 4, 7 with cavities 3, 6 which are made of an iron metal such as tool steel, and nitride by dipping in a salt bath comprising cyanide and cyanate salts at 500-600 deg.C to form nitride films on the surface in thickness of 10-20 microns. EFFECT:Element pellet tracking, mold resin cracking, gaps of bonding surfaces between element mold and mold resin caused by small releasing force can be prevented.
JP10659277A 1977-09-07 1977-09-07 Mold for transfer molding Pending JPS5440863A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10659277A JPS5440863A (en) 1977-09-07 1977-09-07 Mold for transfer molding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10659277A JPS5440863A (en) 1977-09-07 1977-09-07 Mold for transfer molding

Publications (1)

Publication Number Publication Date
JPS5440863A true JPS5440863A (en) 1979-03-31

Family

ID=14437439

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10659277A Pending JPS5440863A (en) 1977-09-07 1977-09-07 Mold for transfer molding

Country Status (1)

Country Link
JP (1) JPS5440863A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6357215A (en) * 1986-08-28 1988-03-11 Rohm Co Ltd Equipment for molding synthetic resin

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6357215A (en) * 1986-08-28 1988-03-11 Rohm Co Ltd Equipment for molding synthetic resin

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