FR2150714A1 - Extruder nozzle - for expanded polymertubes - Google Patents

Extruder nozzle - for expanded polymertubes

Info

Publication number
FR2150714A1
FR2150714A1 FR7227643A FR7227643A FR2150714A1 FR 2150714 A1 FR2150714 A1 FR 2150714A1 FR 7227643 A FR7227643 A FR 7227643A FR 7227643 A FR7227643 A FR 7227643A FR 2150714 A1 FR2150714 A1 FR 2150714A1
Authority
FR
France
Prior art keywords
nozzle
tube
expanded
polymertubes
extruder nozzle
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.)
Withdrawn
Application number
FR7227643A
Other languages
French (fr)
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.)
KraussMaffei Extrusion GmbH
Original Assignee
Hermann Berstorff Maschinenbau GmbH
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 Hermann Berstorff Maschinenbau GmbH filed Critical Hermann Berstorff Maschinenbau GmbH
Publication of FR2150714A1 publication Critical patent/FR2150714A1/en
Withdrawn legal-status Critical Current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
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles

Landscapes

  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

The extruder has a nozzle with an annular orifice through which polymer sheet is extruded in tube form and subsequently expanded, and is provided with cooling tubes placed immediately in front of the nozzle directly at the external and/or internal peripheries of the tube or the nozzle, so as to cool the tube by contact. The use of direct cooling immediately the tube leaves the nozzle stiffens the surfaces and prevents creases developing. The cooling tubes pref. have an anti-friction coating, e.g. of PTFE.
FR7227643A 1971-08-28 1972-08-01 Extruder nozzle - for expanded polymertubes Withdrawn FR2150714A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19717132890U DE7132890U (en) 1971-08-28 1971-08-28 EXTRUDER NOZZLE

Publications (1)

Publication Number Publication Date
FR2150714A1 true FR2150714A1 (en) 1973-04-13

Family

ID=6623528

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7227643A Withdrawn FR2150714A1 (en) 1971-08-28 1972-08-01 Extruder nozzle - for expanded polymertubes

Country Status (3)

Country Link
DE (1) DE7132890U (en)
FR (1) FR2150714A1 (en)
IT (1) IT962220B (en)

Also Published As

Publication number Publication date
DE7132890U (en) 1971-11-18
IT962220B (en) 1973-12-20

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Legal Events

Date Code Title Description
ST Notification of lapse