FR2271918A1 - Extrusion with chilled fluid surrounding the extrudate - for extruding expanded core profiles to close dimension tolerances - Google Patents

Extrusion with chilled fluid surrounding the extrudate - for extruding expanded core profiles to close dimension tolerances

Info

Publication number
FR2271918A1
FR2271918A1 FR7418081A FR7418081A FR2271918A1 FR 2271918 A1 FR2271918 A1 FR 2271918A1 FR 7418081 A FR7418081 A FR 7418081A FR 7418081 A FR7418081 A FR 7418081A FR 2271918 A1 FR2271918 A1 FR 2271918A1
Authority
FR
France
Prior art keywords
extrusion
extrudate
die
fluid surrounding
chilled 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.)
Granted
Application number
FR7418081A
Other languages
French (fr)
Other versions
FR2271918B1 (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.)
ATO Chimie SA
Original Assignee
ATO Chimie 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 ATO Chimie SA filed Critical ATO Chimie SA
Priority to FR7418081A priority Critical patent/FR2271918A1/en
Publication of FR2271918A1 publication Critical patent/FR2271918A1/en
Application granted granted Critical
Publication of FR2271918B1 publication Critical patent/FR2271918B1/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
    • 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
    • B29C48/06—Rod-shaped
    • 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
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911—Cooling
    • 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
    • B29C48/94—Lubricating
    • 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
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films

Abstract

Extrusion process using a die of head adaptor can admit a fluid under pressure between the extrudate and the land surfaces of the profile die; the fluid being chilled prior to injection. Method is esp. for quenching the surface of an extrusion composition contg. a blowing agent, for mfr. of self-skinned boards. The chilling effect of the surface fluid inhibits extrudate die swell on leaving the die, facilitating extrusion to close dimensional tolerances. Direct use of water or chopped ice enhances heat transfer efficiency by utilising the high latent heat of water.
FR7418081A 1974-05-24 1974-05-24 Extrusion with chilled fluid surrounding the extrudate - for extruding expanded core profiles to close dimension tolerances Granted FR2271918A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7418081A FR2271918A1 (en) 1974-05-24 1974-05-24 Extrusion with chilled fluid surrounding the extrudate - for extruding expanded core profiles to close dimension tolerances

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7418081A FR2271918A1 (en) 1974-05-24 1974-05-24 Extrusion with chilled fluid surrounding the extrudate - for extruding expanded core profiles to close dimension tolerances

Publications (2)

Publication Number Publication Date
FR2271918A1 true FR2271918A1 (en) 1975-12-19
FR2271918B1 FR2271918B1 (en) 1976-10-15

Family

ID=9139228

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7418081A Granted FR2271918A1 (en) 1974-05-24 1974-05-24 Extrusion with chilled fluid surrounding the extrudate - for extruding expanded core profiles to close dimension tolerances

Country Status (1)

Country Link
FR (1) FR2271918A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4164523A (en) * 1976-09-09 1979-08-14 Robert Hanning Method of injection-molding and cooling of shaped synthetic-resin bodies
EP0040824A2 (en) * 1980-05-23 1981-12-02 SMAE-SOCIETA' MERIDIONALE ACCESSORI ELASTOMERICI S.p.A Process for continuously manufacturing bi-compound shaped articles and the bi-compound shaped articles so obtained

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4164523A (en) * 1976-09-09 1979-08-14 Robert Hanning Method of injection-molding and cooling of shaped synthetic-resin bodies
EP0040824A2 (en) * 1980-05-23 1981-12-02 SMAE-SOCIETA' MERIDIONALE ACCESSORI ELASTOMERICI S.p.A Process for continuously manufacturing bi-compound shaped articles and the bi-compound shaped articles so obtained
EP0040824A3 (en) * 1980-05-23 1982-04-28 Smae-Societa' Meridionale Accessori Elastomerici S.P.A Process for continuously manufacturing bi-compound shaped articles and the bi-compound shaped articles so obtained

Also Published As

Publication number Publication date
FR2271918B1 (en) 1976-10-15

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Legal Events

Date Code Title Description
ST Notification of lapse