JPS57117937A - Structure of metal molds for hollow molding with under- cut portion - Google Patents

Structure of metal molds for hollow molding with under- cut portion

Info

Publication number
JPS57117937A
JPS57117937A JP533981A JP533981A JPS57117937A JP S57117937 A JPS57117937 A JP S57117937A JP 533981 A JP533981 A JP 533981A JP 533981 A JP533981 A JP 533981A JP S57117937 A JPS57117937 A JP S57117937A
Authority
JP
Japan
Prior art keywords
hollow molding
under
opened
molding
side core
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
JP533981A
Other languages
Japanese (ja)
Inventor
Jiro Oishi
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 JP533981A priority Critical patent/JPS57117937A/en
Publication of JPS57117937A publication Critical patent/JPS57117937A/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
    • B29C45/40—Removing or ejecting moulded articles
    • B29C45/44—Removing or ejecting moulded articles for undercut articles
    • B29C45/4421—Removing or ejecting moulded articles for undercut articles using expansible or collapsible cores

Abstract

PURPOSE:To permit the drawing-out of an inside forming part for making molding easier by using a system in which the inside forming part by which the inside of a hollow molding is molded is divided, and one side core with a convex curve face is made slidable and energized elastically. CONSTITUTION:A synthetic resin is injected into the cavity 33 of molds, and after the resin is hardened, a fixed mold A is opened from a movable mold B, whereupon as an angular pin 16 is drawn out of a guide hole 32, a slide core 30 is moved to the left and right sides and opened. Then, when pulling out a center slide core 4 downwards by a cylinder 20, a side core 7 is moved to the center by the force of a spring 8 and the convex curve face 6 of the side core 7 is removed from the under-cut portion 5 of the hollow molding 1. Then, all the under-cut portions 5 are opened. Then, when the ejector plates 26 and 27 are projected from the molding machine, a stripper plate 5 goes up through a return pin 28 to push out the hollow molding 1.
JP533981A 1981-01-15 1981-01-15 Structure of metal molds for hollow molding with under- cut portion Pending JPS57117937A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP533981A JPS57117937A (en) 1981-01-15 1981-01-15 Structure of metal molds for hollow molding with under- cut portion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP533981A JPS57117937A (en) 1981-01-15 1981-01-15 Structure of metal molds for hollow molding with under- cut portion

Publications (1)

Publication Number Publication Date
JPS57117937A true JPS57117937A (en) 1982-07-22

Family

ID=11608460

Family Applications (1)

Application Number Title Priority Date Filing Date
JP533981A Pending JPS57117937A (en) 1981-01-15 1981-01-15 Structure of metal molds for hollow molding with under- cut portion

Country Status (1)

Country Link
JP (1) JPS57117937A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008519709A (en) * 2004-11-10 2008-06-12 シデル・パーティシペーションズ Mold for container blow molding machine and method for producing container using the mold
JP2011031589A (en) * 2009-08-06 2011-02-17 Takagi Seiko Corp Injection mold and injection molding method
TWI447015B (en) * 2011-06-17 2014-08-01 Sanyang Industry Co Ltd Mold for a storage compartment
CN104309067A (en) * 2014-08-29 2015-01-28 宁波唯尔电器有限公司 Mould
CN105500625A (en) * 2016-01-20 2016-04-20 厦门市锐益工贸有限公司 Efficient automatic assembling mold

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008519709A (en) * 2004-11-10 2008-06-12 シデル・パーティシペーションズ Mold for container blow molding machine and method for producing container using the mold
JP2011031589A (en) * 2009-08-06 2011-02-17 Takagi Seiko Corp Injection mold and injection molding method
TWI447015B (en) * 2011-06-17 2014-08-01 Sanyang Industry Co Ltd Mold for a storage compartment
CN104309067A (en) * 2014-08-29 2015-01-28 宁波唯尔电器有限公司 Mould
CN105500625A (en) * 2016-01-20 2016-04-20 厦门市锐益工贸有限公司 Efficient automatic assembling mold

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