GB1268437A - Improvements in or relating to the moulding of articles foam material - Google Patents

Improvements in or relating to the moulding of articles foam material

Info

Publication number
GB1268437A
GB1268437A GB1440269A GB1440269A GB1268437A GB 1268437 A GB1268437 A GB 1268437A GB 1440269 A GB1440269 A GB 1440269A GB 1440269 A GB1440269 A GB 1440269A GB 1268437 A GB1268437 A GB 1268437A
Authority
GB
United Kingdom
Prior art keywords
screw
piston
cylinder
valve
fluid
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
Application number
GB1440269A
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.)
Noxet UK Ltd
Original Assignee
British United Shoe Machinery 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 British United Shoe Machinery Ltd filed Critical British United Shoe Machinery Ltd
Publication of GB1268437A publication Critical patent/GB1268437A/en
Expired 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/3442—Mixing, kneading or conveying the foamable material
    • 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
    • B29C44/34—Auxiliary operations
    • B29C44/36—Feeding the material to be shaped
    • B29C44/38—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length
    • B29C44/42—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length using pressure difference, e.g. by injection or by vacuum
    • B29C44/422—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length using pressure difference, e.g. by injection or by vacuum by injecting by forward movement of the plastizising screw

Abstract

1,268,437. Injection moulding foam material. BRITISH UNITED SHOE MACHINERY CO. Ltd. 19 March, 1969 [20 March, 1968], No. 14402/69. Heading B5A. In an apparatus for injection moulding articles of foam material, fluid blowing agent is fed to the injection cylinder 3 at a rate dependent upon the rate at which moulding material is fed towards a nozzle 10 by a screw 6, and means 46, 55 are provided for varying the ratio of these two rates. Fluid blowing agent is contained in a cylinder 52 having a piston 50 operated by a piston 43 in a cylinder 40. Fluid under pressure is supplied to one side or the other or to neither side of piston 43 under control of a valve 30 having a slidable valve member 32. Valve 30 is secured to the rod 44 of piston 43 and valve member 32 is biased to the left by a spring 31. A member 46 pivoted at 55 has a head 47, and a lower end bale portion located in a bracket 70 fixedly connected to the screw 6. The screw 6 is rotated by an electric motor 22 and advanced axially by a fluid pressure cylinder 16. Cooling fluid is circulated through passages 82, 69 to cool the cylinder 3 and mould 67, 68 respectively. Operation.-When the screw 6 reaches its forward position the bracket 70 contacts a switch 58 which starts the motor 22 and operates a valve 60 to apply a small pressure from a line 63 to cylinder 16. As the screw 6 rotates it feeds material forwardly and is thereby moved rearwardly. The member 46 is thus moved anticlockwise so allowing the valve member 32 to move to the left to allow fluid under pressure to reach the right hand side of piston 43. The piston 50 is thus moved to the left and blowing agent supplied through a conduit 54 to the cylinder 3. Movement of rod 44 is faster than screw 6 so that the valve member 32 re-engages the head 47 and is returned to its neutral position. The ratio of the rates of feed of blowing agent and moulding material can be varied by moving the pivot 55 along a slot in member 46. When screw 6 reaches its rearmost position a switch 62 operates the valve 60 to apply high pressure to the drive piston 18 and to stop the motor 22. On completion of injection the mould members 67, 68 are separated slightly to enlarge the mould cavity.
GB1440269A 1968-03-20 1969-03-19 Improvements in or relating to the moulding of articles foam material Expired GB1268437A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US71461268A 1968-03-20 1968-03-20

Publications (1)

Publication Number Publication Date
GB1268437A true GB1268437A (en) 1972-03-29

Family

ID=24870761

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1440269A Expired GB1268437A (en) 1968-03-20 1969-03-19 Improvements in or relating to the moulding of articles foam material

Country Status (5)

Country Link
CH (1) CH486979A (en)
DE (1) DE1909211A1 (en)
FR (1) FR2004276A1 (en)
GB (1) GB1268437A (en)
SE (1) SE357913B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113287841A (en) * 2021-06-06 2021-08-24 际华三五一四制革制鞋有限公司 Spiral jet flow polyurethane upper-connected shoe making device and preparation process thereof

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1964748B2 (en) * 1969-12-24 1973-12-13 Chemische Werke Huels Ag, 4370 Marl Process for the production of thermoplastic foam plastic molding by the injection molding process
DE2647249C3 (en) * 1976-10-20 1984-11-15 Ex-Cell-O Corp., Troy, Mich. Method and device for injection molding plastic objects with a dense outer skin and a foamed core
DE3020122C2 (en) * 1980-05-27 1984-04-26 Battenfeld Maschinenfabriken Gmbh, 5882 Meinerzhagen Circuit arrangement for metering gaseous or liquid substances, in particular physical blowing agents, into a flowable melt made of thermoplastic material
DE19848151C2 (en) 1998-10-20 2002-09-19 Battenfeld Gmbh Method and device for injection molding of plastic molded parts made of thermoplastic
CN110328798A (en) * 2019-07-24 2019-10-15 嘉兴市佳杰包装材料有限公司 A kind of highly foaming polyethylene sheet production foaming agent injection device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113287841A (en) * 2021-06-06 2021-08-24 际华三五一四制革制鞋有限公司 Spiral jet flow polyurethane upper-connected shoe making device and preparation process thereof
CN113287841B (en) * 2021-06-06 2024-01-09 际华三五一四制革制鞋有限公司 Spiral jet polyurethane upper-connected shoemaking device and preparation process thereof

Also Published As

Publication number Publication date
DE1909211A1 (en) 1969-10-02
CH486979A (en) 1970-03-15
FR2004276A1 (en) 1969-11-21
SE357913B (en) 1973-07-16

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