JPS56142047A - Method and device for molding of formed body - Google Patents

Method and device for molding of formed body

Info

Publication number
JPS56142047A
JPS56142047A JP4648080A JP4648080A JPS56142047A JP S56142047 A JPS56142047 A JP S56142047A JP 4648080 A JP4648080 A JP 4648080A JP 4648080 A JP4648080 A JP 4648080A JP S56142047 A JPS56142047 A JP S56142047A
Authority
JP
Japan
Prior art keywords
cavity
pin
piston
molding
scrap
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
JP4648080A
Other languages
Japanese (ja)
Inventor
Kazuaki Minamishige
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.)
Denso Corp
Original Assignee
NipponDenso 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 NipponDenso Co Ltd filed Critical NipponDenso Co Ltd
Priority to JP4648080A priority Critical patent/JPS56142047A/en
Publication of JPS56142047A publication Critical patent/JPS56142047A/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
    • 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
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/56—Means for plasticising or homogenising the moulding material or forcing it into the mould using mould parts movable during or after injection, e.g. injection-compression moulding
    • B29C45/5675—Means for plasticising or homogenising the moulding material or forcing it into the mould using mould parts movable during or after injection, e.g. injection-compression moulding for making orifices in or through the moulded article
    • 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
    • B29C45/0025—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks

Landscapes

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

Abstract

PURPOSE: To obtain a molding of excellent finish having a hole without generation of welds and subject to no boring process by driving a punching pin before a molten material filled in a cavity could become solid, and pulling out the said pin after solidification.
CONSTITUTION: First, a movable mold 3 is matched to a fixed mold 4 to form a cavity 5. Next, a molten resin from an injection cylinder 8 is injected into the cavity 5 through channels 6, 7. After this step, the second and third hydraulic pistons 12, 14 are actuated during the period until an injected resin becomes semisolid. Following this process, a punching pin 11 is driven into the cavity 5 and at the same time, a scrap pin 13 is moved back. After this step, a resin inside the cavity 5 is cooled and solidified as it is and then the punching pin 11 is lifted up by means of the piston 12. Later, the movable mold 4 is opened to actuate a hydraulic piston 10 and a molding is taken out with the help of a knockout pin 9. Finally, a scrap is ejected by means of the piston 14.
COPYRIGHT: (C)1981,JPO&Japio
JP4648080A 1980-04-09 1980-04-09 Method and device for molding of formed body Pending JPS56142047A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4648080A JPS56142047A (en) 1980-04-09 1980-04-09 Method and device for molding of formed body

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4648080A JPS56142047A (en) 1980-04-09 1980-04-09 Method and device for molding of formed body

Publications (1)

Publication Number Publication Date
JPS56142047A true JPS56142047A (en) 1981-11-06

Family

ID=12748359

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4648080A Pending JPS56142047A (en) 1980-04-09 1980-04-09 Method and device for molding of formed body

Country Status (1)

Country Link
JP (1) JPS56142047A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6022314U (en) * 1983-07-22 1985-02-15 株式会社ケンウッド injection mold
JPS63197619A (en) * 1987-02-13 1988-08-16 Pijiyon Kk Drilling method of injection molding and drilling device therefor
JPH0241915U (en) * 1988-09-17 1990-03-22
JPH0489314U (en) * 1990-08-10 1992-08-04
JPH04290714A (en) * 1991-03-20 1992-10-15 Shin Kobe Electric Mach Co Ltd Molding method of molded object with hole

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6022314U (en) * 1983-07-22 1985-02-15 株式会社ケンウッド injection mold
JPS63197619A (en) * 1987-02-13 1988-08-16 Pijiyon Kk Drilling method of injection molding and drilling device therefor
JPH0241915U (en) * 1988-09-17 1990-03-22
JPH0489314U (en) * 1990-08-10 1992-08-04
JPH04290714A (en) * 1991-03-20 1992-10-15 Shin Kobe Electric Mach Co Ltd Molding method of molded object with hole

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