CA2246182A1 - Sprue bar assembly - Google Patents
Sprue bar assemblyInfo
- Publication number
- CA2246182A1 CA2246182A1 CA002246182A CA2246182A CA2246182A1 CA 2246182 A1 CA2246182 A1 CA 2246182A1 CA 002246182 A CA002246182 A CA 002246182A CA 2246182 A CA2246182 A CA 2246182A CA 2246182 A1 CA2246182 A1 CA 2246182A1
- Authority
- CA
- Canada
- Prior art keywords
- sprue bar
- sleeve
- sprue
- drool
- bar
- 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
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
- B29C45/03—Injection moulding apparatus
- B29C45/12—Injection moulding apparatus using two or more fixed moulds, e.g. in tandem
-
- 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
- B29C45/322—Runner systems for distributing the moulding material to the stacked mould cavities
Abstract
A sprue bar assembly for a melt transfer system for stack molds comprises a sprue bar and a sprue bar sleeve, a sprue bar and drool restrictor and sleeve or a sprue bar and drool restrictor.
For the assemblies with the sleeve, when the stack mold is opened, the sprue bar slides inside the sprue bar sleeve which captures any leakage therefrom. When the mold is closed, the sprue bar sweeps captured leakage out of the sleeve to an area outside the mold. As the bushing at the end of the sprue bar can contact the nozzle of the injection machine at a point very close to the edge of the fixed platen, the resulting minimum length of the sprue bar is reduced, reducing pressure losses through the sprue bar and reducing the cost of the sprue bar. The sprue bar sleeve can be fabricated from an insulating material to enhance the thermal characteristics of the sprue bar assembly and a scraper can be provided on the sprue bar to improve removal of captured material from the sprue bar sleeve. If a drool restrictor is provided within the bushing, the amount of drool from the sprue bar when the bushing is not in engagement with the nozzle of the injection machine can also be reduced and, in some circumstances, can eliminate the need for the sleeve.
For the assemblies with the sleeve, when the stack mold is opened, the sprue bar slides inside the sprue bar sleeve which captures any leakage therefrom. When the mold is closed, the sprue bar sweeps captured leakage out of the sleeve to an area outside the mold. As the bushing at the end of the sprue bar can contact the nozzle of the injection machine at a point very close to the edge of the fixed platen, the resulting minimum length of the sprue bar is reduced, reducing pressure losses through the sprue bar and reducing the cost of the sprue bar. The sprue bar sleeve can be fabricated from an insulating material to enhance the thermal characteristics of the sprue bar assembly and a scraper can be provided on the sprue bar to improve removal of captured material from the sprue bar sleeve. If a drool restrictor is provided within the bushing, the amount of drool from the sprue bar when the bushing is not in engagement with the nozzle of the injection machine can also be reduced and, in some circumstances, can eliminate the need for the sleeve.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/936,569 US5910327A (en) | 1997-09-24 | 1997-09-24 | Sprue bar assembly for a stack mold |
US08/936,569 | 1997-09-24 | ||
US09/141,588 | 1998-08-28 | ||
US09/141,588 US5968562A (en) | 1997-09-24 | 1998-08-28 | Sprue bar assembly for use in a stack mold |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2246182A1 true CA2246182A1 (en) | 1999-03-24 |
CA2246182C CA2246182C (en) | 2004-09-21 |
Family
ID=26839263
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002246182A Expired - Fee Related CA2246182C (en) | 1997-09-24 | 1998-09-02 | Sprue bar assembly |
Country Status (5)
Country | Link |
---|---|
US (1) | US5968562A (en) |
EP (1) | EP0911139B1 (en) |
JP (2) | JP3830673B2 (en) |
CA (1) | CA2246182C (en) |
DE (1) | DE69820197T2 (en) |
Families Citing this family (30)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002544004A (en) * | 1999-05-10 | 2002-12-24 | モールド‐マスターズ、リミテッド | Method and apparatus for branching melt in multi-stack mold |
CA2271407C (en) * | 1999-05-10 | 2007-01-23 | Mold-Masters Limited | Method and apparatus for distributing melt in a multi-level stack mold |
US6348171B1 (en) * | 1999-05-11 | 2002-02-19 | Mold Masters Limited | Drool control apparatus and method |
US6409955B1 (en) * | 1999-11-29 | 2002-06-25 | Husky Injection Molding Systems Ltd. | Shutheight adjuster for a sprue bar |
US6835060B2 (en) * | 2002-02-19 | 2004-12-28 | Mold-Masters Limited | Gate assembly for reducing drooling of melt from a sprue bar |
US7416402B2 (en) * | 2003-03-31 | 2008-08-26 | Mold-Masters (2007) Limited | Sprue bushing anti-drool device |
US7115226B2 (en) * | 2003-06-20 | 2006-10-03 | Mold-Masters Limited | Stack mold having a melt homogenizing element |
US7125242B2 (en) * | 2003-08-11 | 2006-10-24 | Mold-Masters Limited | Decompression device for an injection molding apparatus |
KR20060111690A (en) * | 2004-02-10 | 2006-10-27 | 스미도모쥬기가이고교 가부시키가이샤 | Injection molding machine |
WO2005122673A2 (en) * | 2004-06-18 | 2005-12-29 | Mold-Masters Limited | Melt transfer device for a stack molding apparatus |
US7165968B2 (en) * | 2004-06-30 | 2007-01-23 | Husky Injection Molding Systems Ltd. | Apparatus and method for sealing injection unit and sprue |
US7361012B2 (en) * | 2004-10-15 | 2008-04-22 | Husky Injection Molding Systems Ltd. | Multiple-level stack mold apparatus |
US7229268B2 (en) * | 2004-10-15 | 2007-06-12 | Husky Injection Molding Systems Ltd. | System for guiding a moldset into a molding machine |
US7462032B2 (en) * | 2006-06-15 | 2008-12-09 | Husky Injection Molding Systems Ltd. | Split sprue bar having a device for preventing leakage |
FR2915417B1 (en) * | 2007-04-25 | 2009-06-26 | Plastic System Packaging Soc P | DEVICE FOR THE PRODUCTION OF TRAY-TYPE CONTAINERS FOR THE USE OF THE "LABELING IN THE MOLD" TECHNIQUE |
JP5090812B2 (en) * | 2007-07-20 | 2012-12-05 | 三菱重工プラスチックテクノロジー株式会社 | Mold changer for injection molding machine with two molds |
US20090028983A1 (en) * | 2007-07-23 | 2009-01-29 | Chih-Yu Chen | Injection mold with a tie bar |
EP2113361A1 (en) * | 2008-04-29 | 2009-11-04 | Plastic System Packaging | Device and method for producing containers with reduced tapering |
US7824175B2 (en) | 2008-06-11 | 2010-11-02 | John Dominka | Injection molding anti-drool nozzle |
US7775789B2 (en) * | 2008-12-23 | 2010-08-17 | Panos Trakas | Sprue bar shutoff device |
EP2475505B1 (en) | 2009-09-10 | 2016-05-11 | Keter Plastic Ltd. | Injection-molding process and article manufactured thereby |
JP5456500B2 (en) * | 2010-02-01 | 2014-03-26 | 小島プレス工業株式会社 | Processing equipment |
JP5631669B2 (en) * | 2010-09-03 | 2014-11-26 | 小島プレス工業株式会社 | Multiple press molding equipment |
CA2818238C (en) * | 2011-01-09 | 2016-11-29 | Husky Injection Molding Systems Ltd. | Melt-delivery assembly including frame assembly positioned outside of platen envelope, and having multiple-outlet assembly |
US8840396B2 (en) | 2011-04-07 | 2014-09-23 | Panos Trakas | Self-propelling sprue bar shutoff device |
IN2014DN03312A (en) * | 2011-10-31 | 2015-06-26 | Honda Motor Co Ltd | |
JP5222990B2 (en) * | 2011-10-31 | 2013-06-26 | 本田技研工業株式会社 | Injection molding apparatus and injection molding method |
CH707792A1 (en) * | 2013-03-26 | 2014-09-30 | Schöttli AG | Apparatus for supplying the liquid plastic in a stack mold. |
US11148343B2 (en) | 2017-07-21 | 2021-10-19 | Nissei Asb Machine Co., Ltd. | Die unit for blow molding, and blow molding device |
JP7053063B1 (en) * | 2020-10-20 | 2022-04-12 | 株式会社国盛化学 | Molding system |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4212626A (en) * | 1978-12-18 | 1980-07-15 | Gellert Jobst U | Stack injection molding melt transfer system |
US4207051A (en) * | 1979-01-11 | 1980-06-10 | Husky Injection Molding Systems Limited | Stripper mechanism for injection mold |
US4299791A (en) * | 1979-07-18 | 1981-11-10 | Katashi Aoki | Method for the prevention of drooling from a plastic injection molding mold and injection nozzles |
DE3336080A1 (en) * | 1983-10-04 | 1985-04-18 | Maschinenfabrik J. Dieffenbacher Gmbh & Co, 7519 Eppingen | INJECTION PRESS |
US4867938B1 (en) * | 1988-01-29 | 1998-05-26 | Husky Injection Molding | Sequential injection molding process |
US5011646A (en) * | 1989-02-24 | 1991-04-30 | Husky Injection Molding Systems Ltd. | Method and apparatus for injection molding using a movable sprue bar |
US5040969A (en) * | 1990-01-26 | 1991-08-20 | Husky Injection Molding Systems Ltd. | Tandem injection molding machine with direct feed to molds |
US5458843A (en) * | 1990-06-27 | 1995-10-17 | Tradesco Mold Limited | Pin-less drool prevention system |
JPH06848A (en) * | 1992-06-18 | 1994-01-11 | Mitsubishi Materials Corp | Stack mold |
JPH068283A (en) * | 1992-06-24 | 1994-01-18 | Mitsubishi Materials Corp | Hot runner mold |
US5578333A (en) * | 1994-04-25 | 1996-11-26 | Husky Injection Molding Systems Ltd. | Combined mold carrier and linkage apparatus |
US5518387A (en) * | 1994-06-22 | 1996-05-21 | Husky Injection Molding Systems Ltd. | Pivoting workpiece removal device |
US5522720A (en) * | 1994-10-24 | 1996-06-04 | Husky Injection Molding Systems Ltd. | Injector nozzle with pivotally movable surfaces |
-
1998
- 1998-08-28 US US09/141,588 patent/US5968562A/en not_active Expired - Lifetime
- 1998-09-02 CA CA002246182A patent/CA2246182C/en not_active Expired - Fee Related
- 1998-09-09 EP EP98307282A patent/EP0911139B1/en not_active Expired - Lifetime
- 1998-09-09 DE DE69820197T patent/DE69820197T2/en not_active Expired - Fee Related
- 1998-09-24 JP JP26985098A patent/JP3830673B2/en not_active Expired - Lifetime
-
2006
- 2006-02-02 JP JP2006025374A patent/JP4209427B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JP4209427B2 (en) | 2009-01-14 |
DE69820197D1 (en) | 2004-01-15 |
US5968562A (en) | 1999-10-19 |
CA2246182C (en) | 2004-09-21 |
EP0911139A2 (en) | 1999-04-28 |
DE69820197T2 (en) | 2004-09-16 |
JP3830673B2 (en) | 2006-10-04 |
EP0911139B1 (en) | 2003-12-03 |
JP2006130932A (en) | 2006-05-25 |
JPH11207786A (en) | 1999-08-03 |
EP0911139A3 (en) | 1999-08-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKLA | Lapsed |