GB1370075A - Injection moulding - Google Patents
Injection mouldingInfo
- Publication number
- GB1370075A GB1370075A GB1837872A GB1837872A GB1370075A GB 1370075 A GB1370075 A GB 1370075A GB 1837872 A GB1837872 A GB 1837872A GB 1837872 A GB1837872 A GB 1837872A GB 1370075 A GB1370075 A GB 1370075A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mould
- skin
- moulding
- injection
- retracted
- 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.)
- Expired
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
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1642—Making multilayered or multicoloured articles having a "sandwich" structure
-
- 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
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
- B29C44/08—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles using several expanding or moulding steps
- B29C44/083—Increasing the size of the cavity after a first part has foamed, e.g. substituting one mould part with another
- B29C44/086—Increasing the size of the cavity after a first part has foamed, e.g. substituting one mould part with another and feeding more material into the enlarged cavity
-
- 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
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1635—Making multilayered or multicoloured articles using displaceable mould parts, e.g. retractable partition between adjacent mould cavities
-
- 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
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1635—Making multilayered or multicoloured articles using displaceable mould parts, e.g. retractable partition between adjacent mould cavities
- B29C45/1639—Removable partitions between adjacent mould cavity portions
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)
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
Abstract
1370075 Injection moulding IMPERIAL CHEMICAL INDUSTRIES Ltd 2 April 1973 [20 April 1972] 18378/72 Heading B5A In a "sandwich moulding" process at least one of the mould members comprises a slidably mounted retractable component 5 which is in the non-retracted position (Fig. 2) during injection of the skin material, but is retracted before or during injection of the core material, but before the mould cavity is filled (Fig. 4, not shown). In one example (Figs. 1-4) the mould is for making a 3-bladed fan and the invention reduces the disparity in skin thickness at the hub periphery 3 and the blade extremity 4. Figure 5 shows a mould 10, 11 for making a shoe sole and comprising two retractable mould members 12, 13 adjacent the heel portion 14. On injection of a foamable core material (18) the members 12, 13 are retracted. The result is a thicker skin in the toe portion than in the heel portion. A further small charge (19) of skin material may be injected and the mould members 10-13 moved apart to permit the core material to foam. Figure 8 shows a female mould member 21 provided with a central sprue 22 and a pair of retractable bars 23 which are in contact with an opposed male mould member (24) Fig. 9 (not shown) during injection of skin material. After retraction, the bars 23 lie flush with the surface of the mould member 21. The result is an even distribution of skin material in the final moulding. In a further' example (not shown) the retractable mould components are flush with the mould surface in their non-retracted position so that in the retracted position the flow path is widened. A protruding component may be retracted more than or less than is necessary to make it flush thereby producing protrusions or depressions in the final moulding. Separate sprue channels for the skin and core materials may be used. Numerous examples of suitable thermoplastic and thermosetting moulding materials are given. Instead of enlarging the mould cavity to permit foaming the pressure on the core material may be reduced by retracting the injection ram.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1837872A GB1370075A (en) | 1972-04-20 | 1972-04-20 | Injection moulding |
US922007D UST922007I4 (en) | 1972-04-20 | 1973-04-05 | Injection moulding |
DE19732320098 DE2320098A1 (en) | 1972-04-20 | 1973-04-19 | INJECTION MOLDING PROCESS |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1837872A GB1370075A (en) | 1972-04-20 | 1972-04-20 | Injection moulding |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1370075A true GB1370075A (en) | 1974-10-09 |
Family
ID=10111442
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1837872A Expired GB1370075A (en) | 1972-04-20 | 1972-04-20 | Injection moulding |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE2320098A1 (en) |
GB (1) | GB1370075A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2124542A (en) * | 1982-07-05 | 1984-02-22 | Cibie Projecteurs | Injection moulding composite article |
WO1998016364A2 (en) * | 1996-10-11 | 1998-04-23 | Coraltech Limited | Method of injection moulding a foamed article |
GB2333739A (en) * | 1996-10-11 | 1999-08-04 | Coraltech Ltd | Method of injection moulding a foamed article |
FR2874350A1 (en) * | 2004-08-18 | 2006-02-24 | Faurecia Interieur Ind Societe | MOLD FOR INJECTION MOLDING OF A PLASTIC PIECE AND MOLDING METHOD |
EP2735417A1 (en) * | 2012-11-27 | 2014-05-28 | Wittmann Battenfeld GmbH | Method for injection moulding plastic parts made of thermoplastic |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES455627A1 (en) * | 1977-01-26 | 1978-01-01 | Mares Ibanez Pedro | Process and apparatus for forming compound structure of various plastic materials in mold having apertured slide plate |
FR2579128B3 (en) * | 1985-03-25 | 1987-07-10 | Cibie Projecteurs | PROCESS FOR PRODUCING A REFLECTOR FOR A PROJECTOR, PARTICULARLY FOR A MOTOR VEHICLE, BY MOLDING-TWO-MATERIAL INJECTION; MOLD FOR IMPLEMENTING THIS PROCESS AND PRODUCT OBTAINED |
DE4414258C2 (en) * | 1994-04-23 | 1996-07-25 | Battenfeld Gmbh | Process for injection molding objects consisting of at least two different layers |
DE4422739A1 (en) * | 1994-06-29 | 1996-01-04 | Teves Gmbh Alfred | Method for thin-walled encapsulation of an electronic circuit that is precisely aligned with the encapsulated wall, and electronic circuit for this |
WO1999010157A1 (en) * | 1997-08-21 | 1999-03-04 | Structoform Spritzgiessen Anisotroper Strukturkomponenten Gmbh | Method and device for injection moulding plastifiable parts |
EP2039491A1 (en) * | 2007-09-19 | 2009-03-25 | ifm Manfred Otte GmbH | Method of inserting the seal of a connector part |
CN105014864B (en) | 2014-05-02 | 2018-11-09 | 东芝机械株式会社 | The manufacturing device of formed products, the manufacturing method of formed products and formed products |
DE102014113615B4 (en) | 2014-09-22 | 2018-09-20 | Hanon Systems | Flap for an air conditioner |
-
1972
- 1972-04-20 GB GB1837872A patent/GB1370075A/en not_active Expired
-
1973
- 1973-04-19 DE DE19732320098 patent/DE2320098A1/en active Pending
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2124542A (en) * | 1982-07-05 | 1984-02-22 | Cibie Projecteurs | Injection moulding composite article |
US4459257A (en) * | 1982-07-05 | 1984-07-10 | Cibie Projecteurs | Process for producing a shaped article by injection moulding |
WO1998016364A2 (en) * | 1996-10-11 | 1998-04-23 | Coraltech Limited | Method of injection moulding a foamed article |
WO1998016364A3 (en) * | 1996-10-11 | 1998-06-18 | Coraltech Ltd | Method of injection moulding a foamed article |
GB2333739A (en) * | 1996-10-11 | 1999-08-04 | Coraltech Ltd | Method of injection moulding a foamed article |
GB2333739B (en) * | 1996-10-11 | 2001-03-21 | Coraltech Ltd | Foamed article |
US6358446B1 (en) | 1996-10-11 | 2002-03-19 | Coraltech Limited | Method of injection moulding a foamed article |
FR2874350A1 (en) * | 2004-08-18 | 2006-02-24 | Faurecia Interieur Ind Societe | MOLD FOR INJECTION MOLDING OF A PLASTIC PIECE AND MOLDING METHOD |
WO2006021697A1 (en) * | 2004-08-18 | 2006-03-02 | Faurecia Interieur Industrie | Mould for the injection moulding of a plastic piece and moulding method |
EP2735417A1 (en) * | 2012-11-27 | 2014-05-28 | Wittmann Battenfeld GmbH | Method for injection moulding plastic parts made of thermoplastic |
Also Published As
Publication number | Publication date |
---|---|
DE2320098A1 (en) | 1973-11-08 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
426 | Order made revoking patent and granting patent of addition in lieu thereof (sect. 26(2)/1949) |