FR2311653A1 - Long single screw adiabatic extruder of high efficiency - suitable for several grades of thermoplastics - Google Patents

Long single screw adiabatic extruder of high efficiency - suitable for several grades of thermoplastics

Info

Publication number
FR2311653A1
FR2311653A1 FR7516547A FR7516547A FR2311653A1 FR 2311653 A1 FR2311653 A1 FR 2311653A1 FR 7516547 A FR7516547 A FR 7516547A FR 7516547 A FR7516547 A FR 7516547A FR 2311653 A1 FR2311653 A1 FR 2311653A1
Authority
FR
France
Prior art keywords
extruder
screw
thermoplastics
high efficiency
adiabatic
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Withdrawn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
FR7516547A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR7516547A priority Critical patent/FR2311653A1/en
Publication of FR2311653A1 publication Critical patent/FR2311653A1/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Withdrawn legal-status Critical Current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
    • 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
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/68—Barrels or cylinders
    • B29C48/685—Barrels or cylinders characterised by their inner surfaces, e.g. having grooves, projections or threads
    • B29C48/686—Barrels or cylinders characterised by their inner surfaces, e.g. having grooves, projections or threads having grooves or cavities
    • 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
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • 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
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/505—Screws
    • B29C48/56—Screws having grooves or cavities other than the thread or the channel
    • 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

Abstract

Extruder for adiabatic extrusion of thermoplastics (e.g. polyethylene), has a screw with an L/D ratio between 28 and 35 and small clearances, i.e. 0.03-0.1 mm, between the screw flights and the barrel along the feed and compression zones. The compression ratio is 2.5-2.8. The screw has a melt calibration zone of constant depth with flight/barrel clearances pref. 0.4-0.6 mm. The screw can be driven at >=350 r/min. Extruder is capable of higher and more efficient outputs than conventional adiabatic extruder with shorter screws and greater flight/barrel clearances. The relatively long compression and calibration zones and coolant control allow the machine to be set to process more than one grade of material.
FR7516547A 1975-05-21 1975-05-21 Long single screw adiabatic extruder of high efficiency - suitable for several grades of thermoplastics Withdrawn FR2311653A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7516547A FR2311653A1 (en) 1975-05-21 1975-05-21 Long single screw adiabatic extruder of high efficiency - suitable for several grades of thermoplastics

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7516547A FR2311653A1 (en) 1975-05-21 1975-05-21 Long single screw adiabatic extruder of high efficiency - suitable for several grades of thermoplastics

Publications (1)

Publication Number Publication Date
FR2311653A1 true FR2311653A1 (en) 1976-12-17

Family

ID=9155737

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7516547A Withdrawn FR2311653A1 (en) 1975-05-21 1975-05-21 Long single screw adiabatic extruder of high efficiency - suitable for several grades of thermoplastics

Country Status (1)

Country Link
FR (1) FR2311653A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2380857A1 (en) * 1977-02-17 1978-09-15 Dynamit Nobel Ag METHOD AND DEVICE FOR INCORPORATING GLASS FIBERS IN THERMOPLASTIC MATERIALS
EP0051543A2 (en) * 1980-11-04 1982-05-12 Union Carbide Corporation Low-energy extruder-pump system
EP0124020A2 (en) * 1983-04-29 1984-11-07 Christiaan Johan Rauwendaal Extruder screw
WO2001043559A2 (en) * 1999-12-16 2001-06-21 Unilever N.V. Process and equipment for the manufacture of edible spreads

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2380857A1 (en) * 1977-02-17 1978-09-15 Dynamit Nobel Ag METHOD AND DEVICE FOR INCORPORATING GLASS FIBERS IN THERMOPLASTIC MATERIALS
EP0051543A2 (en) * 1980-11-04 1982-05-12 Union Carbide Corporation Low-energy extruder-pump system
EP0051543A3 (en) * 1980-11-04 1983-06-29 Union Carbide Corporation Low-energy extruder-pump system
EP0124020A2 (en) * 1983-04-29 1984-11-07 Christiaan Johan Rauwendaal Extruder screw
EP0124020A3 (en) * 1983-04-29 1985-07-24 Christiaan Johan Rauwendaal Extruder screw
WO2001043559A2 (en) * 1999-12-16 2001-06-21 Unilever N.V. Process and equipment for the manufacture of edible spreads
WO2001043559A3 (en) * 1999-12-16 2002-05-10 Unilever Nv Process and equipment for the manufacture of edible spreads

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Legal Events

Date Code Title Description
ST Notification of lapse