FR2336236A1 - Hot runner injection moulding heat with a sleeve valve - which closes radial runner gates, for moulding without producing surface gate blemishes - Google Patents

Hot runner injection moulding heat with a sleeve valve - which closes radial runner gates, for moulding without producing surface gate blemishes

Info

Publication number
FR2336236A1
FR2336236A1 FR7638628A FR7638628A FR2336236A1 FR 2336236 A1 FR2336236 A1 FR 2336236A1 FR 7638628 A FR7638628 A FR 7638628A FR 7638628 A FR7638628 A FR 7638628A FR 2336236 A1 FR2336236 A1 FR 2336236A1
Authority
FR
France
Prior art keywords
moulding
gates
sleeve valve
runner
blemishes
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.)
Granted
Application number
FR7638628A
Other languages
French (fr)
Other versions
FR2336236B1 (en
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.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
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 Eastman Kodak Co filed Critical Eastman Kodak Co
Publication of FR2336236A1 publication Critical patent/FR2336236A1/en
Application granted granted Critical
Publication of FR2336236B1 publication Critical patent/FR2336236B1/fr
Granted 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
    • B29C45/26—Moulds
    • B29C45/27—Sprue channels ; Runner channels or runner nozzles
    • B29C45/2735—Sprue channels ; Runner channels or runner nozzles for non-coaxial gates, e.g. for edge gates
    • 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
    • B29C45/27—Sprue channels ; Runner channels or runner nozzles
    • B29C45/28—Closure devices therefor
    • B29C45/2803—Closure devices therefor comprising a member with an opening or the injection nozzle movable into or out of alignment with the sprue channel or mould gate
    • 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
    • B29C45/32—Moulds having several axially spaced mould cavities, i.e. for making several separated articles

Landscapes

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

Abstract

Injection moulding appts. incorporating a hot runner system with radial gates emanating at >=1 levels from a column of melt, where the runner barrel is surrounded by a sleeve valve to seal the gates as the mould cavity tool is parted from the runner tool. Used esp. for multi-cavity tools producing mouldings with a high quality surface finish. The injection gate is positively closed off by the sleeve valve so that the moulding surface is not subject to any drag or adhesion by the sprue system as the moulding is ejected. Large gates can be used without resulting in gate marks on the moulding requiring machining or buffing.
FR7638628A 1975-12-22 1976-12-22 Hot runner injection moulding heat with a sleeve valve - which closes radial runner gates, for moulding without producing surface gate blemishes Granted FR2336236A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US64295175A 1975-12-22 1975-12-22

Publications (2)

Publication Number Publication Date
FR2336236A1 true FR2336236A1 (en) 1977-07-22
FR2336236B1 FR2336236B1 (en) 1979-04-13

Family

ID=24578732

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7638628A Granted FR2336236A1 (en) 1975-12-22 1976-12-22 Hot runner injection moulding heat with a sleeve valve - which closes radial runner gates, for moulding without producing surface gate blemishes

Country Status (1)

Country Link
FR (1) FR2336236A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2824729A1 (en) * 1978-06-06 1979-12-13 Asahi Chemical Ind Injection mould esp. for multiple small mouldings - has heated inlet block with heat regenerator near surfaces which cool during contact with mould
EP0066649A2 (en) * 1981-06-10 1982-12-15 Discovision Associates Hot sprue sleeve valve assembly for an injection molding machine
WO1992008597A1 (en) * 1990-11-09 1992-05-29 Gpt Axxicon B.V. Injection mould
WO2006088590A1 (en) * 2005-02-16 2006-08-24 D-M-E Company Nozzle and apparatus for injection molding

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2824729A1 (en) * 1978-06-06 1979-12-13 Asahi Chemical Ind Injection mould esp. for multiple small mouldings - has heated inlet block with heat regenerator near surfaces which cool during contact with mould
EP0066649A2 (en) * 1981-06-10 1982-12-15 Discovision Associates Hot sprue sleeve valve assembly for an injection molding machine
EP0066649A3 (en) * 1981-06-10 1983-10-05 Discovision Associates Hot sprue sleeve valve assembly for an injection molding machine
WO1992008597A1 (en) * 1990-11-09 1992-05-29 Gpt Axxicon B.V. Injection mould
US5324190A (en) * 1990-11-09 1994-06-28 Gpt Axxicon B.V. Injection mould for manufacturing disc-shaped plastic articles
WO2006088590A1 (en) * 2005-02-16 2006-08-24 D-M-E Company Nozzle and apparatus for injection molding
US7252501B2 (en) 2005-02-16 2007-08-07 D-M-E Company Nozzle and apparatus for injection molding

Also Published As

Publication number Publication date
FR2336236B1 (en) 1979-04-13

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Legal Events

Date Code Title Description
ST Notification of lapse