FR2267876A1 - Annular extrusion nozzle for expanded plastic - formed by centre body mounted by perforated radial plate in a chamber - Google Patents

Annular extrusion nozzle for expanded plastic - formed by centre body mounted by perforated radial plate in a chamber

Info

Publication number
FR2267876A1
FR2267876A1 FR7413338A FR7413338A FR2267876A1 FR 2267876 A1 FR2267876 A1 FR 2267876A1 FR 7413338 A FR7413338 A FR 7413338A FR 7413338 A FR7413338 A FR 7413338A FR 2267876 A1 FR2267876 A1 FR 2267876A1
Authority
FR
France
Prior art keywords
pref
chamber
centre
extrusion
perforated plate
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
Application number
FR7413338A
Other languages
French (fr)
Other versions
FR2267876B1 (en
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 FR7413338A priority Critical patent/FR2267876A1/en
Publication of FR2267876A1 publication Critical patent/FR2267876A1/en
Application granted granted Critical
Publication of FR2267876B1 publication Critical patent/FR2267876B1/fr
Granted 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

An extrusion nozzle includes a chamber within a housing which pref. is formed in two parts which are bolted together with a perforated plate between them and a torpedo shaped centre-body is located concentrically in the chamber, the centre-body being supported by pref. being screwed into a central aperture in the perforated plate. The space between the centre-body and chamber wall defines an annular feed duct through which melt passes to an annular extrusion aperture defined by a pref. cylindrical portion of the body and a pref. circular mouth of the chamber and pref. a sleeve is slidable along a part of this cylindrical portion projecting through the mouth to allow adjustment of the size of the extrusion aperture. Pref. the annular feed duct narrows to a throttle immediately downstream of the perforated plate. The nozzle allows extrusion of expanded polystyrene foam to produce tubes having wall thicknesses of 0.203-0.254 mm. The tube may be subsequently split axially to produce a flat sheet.
FR7413338A 1974-04-17 1974-04-17 Annular extrusion nozzle for expanded plastic - formed by centre body mounted by perforated radial plate in a chamber Granted FR2267876A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7413338A FR2267876A1 (en) 1974-04-17 1974-04-17 Annular extrusion nozzle for expanded plastic - formed by centre body mounted by perforated radial plate in a chamber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7413338A FR2267876A1 (en) 1974-04-17 1974-04-17 Annular extrusion nozzle for expanded plastic - formed by centre body mounted by perforated radial plate in a chamber

Publications (2)

Publication Number Publication Date
FR2267876A1 true FR2267876A1 (en) 1975-11-14
FR2267876B1 FR2267876B1 (en) 1979-02-16

Family

ID=9137719

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7413338A Granted FR2267876A1 (en) 1974-04-17 1974-04-17 Annular extrusion nozzle for expanded plastic - formed by centre body mounted by perforated radial plate in a chamber

Country Status (1)

Country Link
FR (1) FR2267876A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2626811A1 (en) * 1988-02-04 1989-08-11 Bertho Patrick Device allowing variation in the masses of extruded articles
EP0444224A1 (en) * 1990-02-27 1991-09-04 Nederlandse Pillo-Pak Maatschappij B.V. Extrusion head regulator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2626811A1 (en) * 1988-02-04 1989-08-11 Bertho Patrick Device allowing variation in the masses of extruded articles
EP0444224A1 (en) * 1990-02-27 1991-09-04 Nederlandse Pillo-Pak Maatschappij B.V. Extrusion head regulator

Also Published As

Publication number Publication date
FR2267876B1 (en) 1979-02-16

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Legal Events

Date Code Title Description
ST Notification of lapse