GB1399654A - Dies for the extrusion of expanded plastics materials and extrusion using such dies - Google Patents

Dies for the extrusion of expanded plastics materials and extrusion using such dies

Info

Publication number
GB1399654A
GB1399654A GB1514372A GB1514372A GB1399654A GB 1399654 A GB1399654 A GB 1399654A GB 1514372 A GB1514372 A GB 1514372A GB 1514372 A GB1514372 A GB 1514372A GB 1399654 A GB1399654 A GB 1399654A
Authority
GB
United Kingdom
Prior art keywords
torpedo
die
extrusion
dies
die body
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
GB1514372A
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.)
OMEGA PLASTICS Ltd
Original Assignee
OMEGA PLASTICS 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 OMEGA PLASTICS Ltd filed Critical OMEGA PLASTICS Ltd
Priority to GB1514372A priority Critical patent/GB1399654A/en
Priority to BE143193A priority patent/BE813703A/en
Publication of GB1399654A publication Critical patent/GB1399654A/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
    • B29C44/36—Feeding the material to be shaped
    • B29C44/46—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length
    • B29C44/50—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length using pressure difference, e.g. by extrusion or by spraying
    • B29C44/507—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length using pressure difference, e.g. by extrusion or by spraying extruding the compound through an annular die
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B29C48/325—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles being adjustable, i.e. having adjustable exit sections
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0019—Combinations of extrusion moulding with other shaping operations combined with shaping by flattening, folding or bending
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles

Abstract

1399654 Extrusion dies OMEGA PLASTICS Ltd 28 March 1973 [30 March 1972] 15143/72 Heading B5A An extrusion die which enables foamed polystyrene sheeting having a thickness of less than 0À010 inch and a weight of less than 30 grams per square metre to be formed, comprises a torpedo which is held to the die body by a perforated breaker plate 9 and which includes aligned bores 24, 25 that co-operate with a bore 26 in the outer ring of an air spacing ring 8 and with a bore 27 in a tube 28 to allow pressure air to pass through the die and inflate the extruded tube. The torpedo comprises a bullet-shaped upstream part 17 and a downstream part 18 which are screw-threaded together and to the breakerplate 9. The latter comprises two rings of perforations 30. Immediately downstream of the breaker-plate 9, the torpedo and die body 1 taper towards each other, i.e. 31, 32, to form a throat section 33. Further downstream the torpedo tapers more than the body to form a section 35 which increases in radial width in a downstream direction. Passage of molten polystyrene which includes a blowing agent, through the throat section 33 and section 35 gives rise to a turbulence which together with passage through the breaker-plate 9 destroys the rotational motion of the material due to the screw (40, Fig. 2). The torpedo includes an extension which carries an adjustable sleeve 19 which has a lip 20 which co-operates with a lip 14 of the die body to define an annular die outlet. The extruded tube is passed through a collapsing screen 48 of rollers, a set of draw-off rollers 49 which roll the tube flat and an edge slitter 50 to a wind-up station 51. The extrusion die is also provided with a wire screen filter pack 5 and is surrounded by a cooling water jacket to provide a die body temperature of 260- 280‹ F.
GB1514372A 1972-03-30 1972-03-30 Dies for the extrusion of expanded plastics materials and extrusion using such dies Expired GB1399654A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB1514372A GB1399654A (en) 1972-03-30 1972-03-30 Dies for the extrusion of expanded plastics materials and extrusion using such dies
BE143193A BE813703A (en) 1972-03-30 1974-04-12 IMPROVEMENTS CONCERNING DRIVES FOR EXTRUDING EXPANDED SYNTHETIC MATERIALS AND EXTRUSION PROCESS USING SUCH DRIVES

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1514372A GB1399654A (en) 1972-03-30 1972-03-30 Dies for the extrusion of expanded plastics materials and extrusion using such dies

Publications (1)

Publication Number Publication Date
GB1399654A true GB1399654A (en) 1975-07-02

Family

ID=10053807

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1514372A Expired GB1399654A (en) 1972-03-30 1972-03-30 Dies for the extrusion of expanded plastics materials and extrusion using such dies

Country Status (2)

Country Link
BE (1) BE813703A (en)
GB (1) GB1399654A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4931237A (en) * 1989-01-23 1990-06-05 Amoco Corporation Extrusion die apparatus and process for producing tubular film from thermoplastic molten material
GB2318542A (en) * 1996-10-25 1998-04-29 Menza Ltd A method of blow-moulding
CN110696319A (en) * 2019-10-22 2020-01-17 昆山圣源机械有限公司 Polyvinyl chloride PVC water supply pipe mould
CN114193802A (en) * 2021-12-10 2022-03-18 永高股份有限公司 Composite pipe production equipment

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4931237A (en) * 1989-01-23 1990-06-05 Amoco Corporation Extrusion die apparatus and process for producing tubular film from thermoplastic molten material
WO1990008026A1 (en) * 1989-01-23 1990-07-26 Amoco Corporation An extrusion die apparatus and process for producing tubular film from thermoplastic molten material
AU622287B2 (en) * 1989-01-23 1992-04-02 Amoco Corporation An extrusion die apparatus and process for producing tubular film from thermoplastic molten material
GB2318542A (en) * 1996-10-25 1998-04-29 Menza Ltd A method of blow-moulding
US5935493A (en) * 1996-10-25 1999-08-10 Menza Limited Method for blow-moulding
GB2318542B (en) * 1996-10-25 1999-12-15 Menza Ltd A method of and apparatus for blow-moulding
CN110696319A (en) * 2019-10-22 2020-01-17 昆山圣源机械有限公司 Polyvinyl chloride PVC water supply pipe mould
CN114193802A (en) * 2021-12-10 2022-03-18 永高股份有限公司 Composite pipe production equipment
CN114193802B (en) * 2021-12-10 2023-05-16 公元股份有限公司 Composite pipe production equipment

Also Published As

Publication number Publication date
BE813703A (en) 1974-07-31

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee