TW200518904A - Ejector pin - Google Patents

Ejector pin

Info

Publication number
TW200518904A
TW200518904A TW093105935A TW93105935A TW200518904A TW 200518904 A TW200518904 A TW 200518904A TW 093105935 A TW093105935 A TW 093105935A TW 93105935 A TW93105935 A TW 93105935A TW 200518904 A TW200518904 A TW 200518904A
Authority
TW
Taiwan
Prior art keywords
groove
gas
cavity
gas vent
shoulder part
Prior art date
Application number
TW093105935A
Other languages
Chinese (zh)
Other versions
TWI250068B (en
Inventor
Masaaki Muraki
Original Assignee
Misumi Corp
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 Misumi Corp filed Critical Misumi Corp
Publication of TW200518904A publication Critical patent/TW200518904A/en
Application granted granted Critical
Publication of TWI250068B publication Critical patent/TWI250068B/en

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
    • 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
    • B29C45/34—Moulds having venting means

Landscapes

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

Abstract

An ejector pin slidably inserted into a pin hole drilled in a mold in which a cavity is formed, having a gas vent groove spirally formed in the outer peripheral surface thereof to release gas in the cavity to the outside, capable of suppressing the adhesion and accumulation of gas components in the gas vent groove, allowing the gas components adhered to the peripheral surface of the pin hole to be scraped off, and capable of preventing galling in ejecting operation, wherein the cross sectional shape of the gas vent groove is formed in a curved one in which a corner part is not present in the groove so that the deepest part of the groove is positioned forward (cavity side) of the lateral center of the groove. The depth of the groove is made shallow gradually from the deepest part toward a rearward groove shoulder part, and the corner angle of the rearward groove shoulder part is made larger than the corner angle (generally 90 ) of a forward groove shoulder part.
TW93105935A 2003-12-09 2004-03-05 Ejector pin TWI250068B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003410894A JP3587845B1 (en) 2003-12-09 2003-12-09 Ejector pin

Publications (2)

Publication Number Publication Date
TW200518904A true TW200518904A (en) 2005-06-16
TWI250068B TWI250068B (en) 2006-03-01

Family

ID=33475611

Family Applications (1)

Application Number Title Priority Date Filing Date
TW93105935A TWI250068B (en) 2003-12-09 2004-03-05 Ejector pin

Country Status (3)

Country Link
JP (1) JP3587845B1 (en)
TW (1) TWI250068B (en)
WO (1) WO2005056264A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8252214B2 (en) 2005-12-23 2012-08-28 Shenzhen Futaihong Precision Industry Co., Ltd. Gas extraction method from mold cavity

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017024075A (en) * 2015-07-24 2017-02-02 株式会社日伸電工 Molding die device, vent pin and molding method

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61235108A (en) * 1985-04-12 1986-10-20 Daiichi Kasei Kk Structure of ejector mechanism for metal mold
JPS61201815U (en) * 1985-06-06 1986-12-18
JPS62189117U (en) * 1986-05-22 1987-12-02
JPH0711319U (en) * 1993-07-27 1995-02-21 松下電工株式会社 Mold cleaning device with air vent
US5997783A (en) * 1997-10-31 1999-12-07 Woodbridge Foam Corporation Method for producing a molded article using a vented mold
JP2000317997A (en) * 1999-05-12 2000-11-21 Canon Inc Injection molding die
JP2003211503A (en) * 2002-01-23 2003-07-29 Okuma Corp Ejection system for vertical molder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8252214B2 (en) 2005-12-23 2012-08-28 Shenzhen Futaihong Precision Industry Co., Ltd. Gas extraction method from mold cavity

Also Published As

Publication number Publication date
WO2005056264A1 (en) 2005-06-23
JP2005169741A (en) 2005-06-30
JP3587845B1 (en) 2004-11-10
TWI250068B (en) 2006-03-01

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Legal Events

Date Code Title Description
MM4A Annulment or lapse of patent due to non-payment of fees