ES2015163A6 - Process and die for co-extrusion of laminar lightweight thermoplastic tubing - Google Patents

Process and die for co-extrusion of laminar lightweight thermoplastic tubing

Info

Publication number
ES2015163A6
ES2015163A6 ES8902346A ES8902346A ES2015163A6 ES 2015163 A6 ES2015163 A6 ES 2015163A6 ES 8902346 A ES8902346 A ES 8902346A ES 8902346 A ES8902346 A ES 8902346A ES 2015163 A6 ES2015163 A6 ES 2015163A6
Authority
ES
Spain
Prior art keywords
die
laminar
extrusion
core
thermoplastic tubing
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 - Fee Related
Application number
ES8902346A
Other languages
Spanish (es)
Inventor
Claude Dehennau
Marc Kerger
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.)
Solvay SA
Original Assignee
Solvay SA
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 Solvay SA filed Critical Solvay SA
Publication of ES2015163A6 publication Critical patent/ES2015163A6/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • 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
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
    • 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
    • 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
    • B29C48/335—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles
    • 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
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/0072—Roughness, e.g. anti-slip
    • 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
    • B29L2023/22—Tubes or pipes, i.e. rigid

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)

Abstract

The tubing comprises a core of expanded material between inner and outer walls of dense material, which is co-extruded through a distribution head then through a conventional tube die (1) comprising a divergent-convergent portion (2, 3) and a straight portion (6) for shaping the tube, having a narrowed flowpath zone (7) in order to bring about an increase in pressure from 2 x 10<6> to 15 x 10<6> Pascals in the thermoplastic materials flowing into the convergent portion of the die. The pressure increase removes lines of weakness, which would otherwise be caused by the flow of the materials around supporting fins (4) for the core (5) of the die (1).
ES8902346A 1988-07-04 1989-07-03 Process and die for co-extrusion of laminar lightweight thermoplastic tubing Expired - Fee Related ES2015163A6 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8809125A FR2633554B1 (en) 1988-07-04 1988-07-04 METHOD FOR PRODUCING, BY COEXTRUSION, AN LIGHTWEIGHT PIPE AND DIE FOR ITS PRODUCTION

Publications (1)

Publication Number Publication Date
ES2015163A6 true ES2015163A6 (en) 1990-08-01

Family

ID=9368123

Family Applications (1)

Application Number Title Priority Date Filing Date
ES8902346A Expired - Fee Related ES2015163A6 (en) 1988-07-04 1989-07-03 Process and die for co-extrusion of laminar lightweight thermoplastic tubing

Country Status (10)

Country Link
AT (1) AT403778B (en)
BE (1) BE1006667A3 (en)
CH (1) CH680659A5 (en)
DE (1) DE3921853C2 (en)
ES (1) ES2015163A6 (en)
FR (1) FR2633554B1 (en)
GB (1) GB2220165B (en)
IT (1) IT1230889B (en)
NL (1) NL195010C (en)
PT (1) PT91013B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6827888B2 (en) * 2001-01-23 2004-12-07 Genpak Llc Polymeric foam sheet using ambient gas blowing agent via controlled expansion
CN102001173B (en) * 2010-12-02 2013-06-05 铜陵三佳科技股份有限公司 Co-extrusion die head for extruding profiled bars with co-extrusion surface
CN102922723A (en) * 2012-11-08 2013-02-13 苏州金纬机械制造有限公司 Molding pipe split-flow mold
CN106827449B (en) * 2017-01-20 2022-11-25 广东科志达机械科技有限公司 Film blowing device of film blowing machine

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL106764C (en) * 1956-03-22 1900-01-01
GB1128809A (en) * 1965-10-28 1968-10-02 Monsanto Chemicals Foamed resins
US3497915A (en) * 1967-03-16 1970-03-03 Cupples Container Co Extrusion die
CH469550A (en) * 1967-07-12 1969-03-15 Basf Ag Ring nozzle for extruders, in particular a blow head for the production of tubular films made of expandable thermoplastics
GB1211860A (en) * 1967-10-03 1970-11-11 Ici Ltd A process for the production of pipe
FR2139626B3 (en) * 1971-05-26 1973-05-25 Armosig
FR2130735A5 (en) * 1970-05-29 1972-11-10 Armosig
DE2126976A1 (en) * 1970-05-29 1972-01-20 Armosig Extrusion press - with section of constant diameter to allow foaming action to stabilise
US3899276A (en) * 1973-05-29 1975-08-12 Beloit Corp Annular extrusion die with back pressure control
US4057610A (en) * 1975-07-25 1977-11-08 Monsanto Company Hose reinforced with discontinuous fibers oriented in the radial direction
DE2610972C2 (en) * 1976-03-16 1984-04-12 Erich 7326 Heiningen Oprach Device for the production of pipes or similar hollow strands made of thermoplastic material
FR2427897A1 (en) * 1978-06-09 1980-01-04 Pont A Mousson Pipe extrusion die allowing sudden wall thickness variation - by adjustment of the melt volume of a die receiving melt at a constant rate
FR2455972A1 (en) * 1979-05-10 1980-12-05 Sogecan Ste Gle Canalisations PROCESS AND APPARATUS FOR THE EXTRUSION OF PLASTIC TUBES WITH COMPOSITE WALLS
FR2494180A1 (en) * 1980-11-19 1982-05-21 Comp Generale Electricite Making plastic profiles or sheet - with enhanced transverse thermal conductivity, by extrusion via an annular choke to reorientate conductive fillers
DE3233250A1 (en) * 1982-09-08 1984-03-08 Basf Ag, 6700 Ludwigshafen DEVICE FOR EXTRUDING THERMOPLASTIC PLASTICS

Also Published As

Publication number Publication date
NL195010C (en) 2003-06-10
IT8920940A0 (en) 1989-06-21
PT91013B (en) 1994-06-30
PT91013A (en) 1990-02-08
IT1230889B (en) 1991-11-08
NL8901687A (en) 1990-02-01
AT403778B (en) 1998-05-25
FR2633554B1 (en) 1990-10-19
FR2633554A1 (en) 1990-01-05
DE3921853A1 (en) 1990-01-11
ATA149589A (en) 1997-10-15
BE1006667A3 (en) 1994-11-16
GB8914629D0 (en) 1989-08-16
CH680659A5 (en) 1992-10-15
GB2220165A (en) 1990-01-04
GB2220165B (en) 1992-07-01
DE3921853C2 (en) 1999-04-08

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Legal Events

Date Code Title Description
PC1A Transfer granted

Owner name: SOLVAY (SOCIETE ANONYME)

FD1A Patent lapsed

Effective date: 20050704