JPS6475217A - Injection mold - Google Patents

Injection mold

Info

Publication number
JPS6475217A
JPS6475217A JP23466487A JP23466487A JPS6475217A JP S6475217 A JPS6475217 A JP S6475217A JP 23466487 A JP23466487 A JP 23466487A JP 23466487 A JP23466487 A JP 23466487A JP S6475217 A JPS6475217 A JP S6475217A
Authority
JP
Japan
Prior art keywords
movable pin
resin
mold
filled out
thin part
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
JP23466487A
Other languages
Japanese (ja)
Inventor
Suguru Hamano
Kenichi Suzuki
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works 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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP23466487A priority Critical patent/JPS6475217A/en
Publication of JPS6475217A publication Critical patent/JPS6475217A/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
    • 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)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

PURPOSE:To constitute the title mold so that a pin hole, short shot, uneven weld and yellowing are not generated on a thin part, by providing a movable pin on either a stationary side or a movable side by corresponding to the thin part of a molded product. CONSTITUTION:Resin 5 cast into a cavity formed by combining a top and bottom forces 1A, 1B flows along the circumference of a movable pin 3 and a thick part (b) is filled out first. Then when casting of the resin 5 is kept on as it is, a spring 6 is pressed with molding pressure, the movable pin 3 is moved downward, the resin 5 is streamed into a gap produced between the tip of the movable pin 3 and a mold 1A, a movement of the movable pin 3 is regulated at a point of time when a thin part (a) has arrived at a predetermined thickness (h) and the gap becomes a state where it is completely filled out. When the movable pin 3 begins to move downward, the gap produced between the tip of the movable pin 3 and the mold 1A becomes vacuous and the resin is filled out sufficiently without leaving air behind.
JP23466487A 1987-09-17 1987-09-17 Injection mold Pending JPS6475217A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23466487A JPS6475217A (en) 1987-09-17 1987-09-17 Injection mold

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23466487A JPS6475217A (en) 1987-09-17 1987-09-17 Injection mold

Publications (1)

Publication Number Publication Date
JPS6475217A true JPS6475217A (en) 1989-03-20

Family

ID=16974549

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23466487A Pending JPS6475217A (en) 1987-09-17 1987-09-17 Injection mold

Country Status (1)

Country Link
JP (1) JPS6475217A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010088552A (en) * 2008-10-06 2010-04-22 Maxell Seiki Kk Method of manufacturing thin cap, the thin cap, and dirt prevention cover provided with lens cap
JP2023072968A (en) * 2021-11-15 2023-05-25 パナソニックＩｐマネジメント株式会社 Molded product and its manufacturing method, injection mold, molding equipment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010088552A (en) * 2008-10-06 2010-04-22 Maxell Seiki Kk Method of manufacturing thin cap, the thin cap, and dirt prevention cover provided with lens cap
JP2023072968A (en) * 2021-11-15 2023-05-25 パナソニックＩｐマネジメント株式会社 Molded product and its manufacturing method, injection mold, molding equipment

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