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FR2395133A1 - Screw extrusion and mixing appts. - having cooperating grooved barrel and screw, for extrusion of thermoplastic or thermosetting materials - Google Patents

Screw extrusion and mixing appts. - having cooperating grooved barrel and screw, for extrusion of thermoplastic or thermosetting materials

Info

Publication number
FR2395133A1
FR2395133A1 FR7719182A FR7719182A FR2395133A1 FR 2395133 A1 FR2395133 A1 FR 2395133A1 FR 7719182 A FR7719182 A FR 7719182A FR 7719182 A FR7719182 A FR 7719182A FR 2395133 A1 FR2395133 A1 FR 2395133A1
Authority
FR
France
Prior art keywords
screw
barrel
extrusion
grooves
thermoplastic
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Withdrawn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
FR7719182A
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 FR7719182A priority Critical patent/FR2395133A1/en
Publication of FR2395133A1 publication Critical patent/FR2395133A1/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Withdrawn legal-status Critical Current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

Landscapes

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

Abstract

Extrusion and mixing appts. comprises a barrel with inlet and outlet ends and a rotating screw reciprocably located within the barrel. The internal surface of the barrel is grooved as is the surface of the screw. In a first section nearest the inlet end of the barrel the depth of the grooves in the barrel gradually increases whilst that of the grooves in the screw gradually decreases. In this way an increasing proportion of the working material is forced into the barrel grooves. In a second section the barrel grooves are abruptly decreased and that of the screw increased to cause the material to abruptly flow from the barrel to the screw grooves. The length of the second section is considerably shorter than the first. Homogeneous blending is obtd.
FR7719182A 1977-06-22 1977-06-22 Screw extrusion and mixing appts. - having cooperating grooved barrel and screw, for extrusion of thermoplastic or thermosetting materials Withdrawn FR2395133A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7719182A FR2395133A1 (en) 1977-06-22 1977-06-22 Screw extrusion and mixing appts. - having cooperating grooved barrel and screw, for extrusion of thermoplastic or thermosetting materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7719182A FR2395133A1 (en) 1977-06-22 1977-06-22 Screw extrusion and mixing appts. - having cooperating grooved barrel and screw, for extrusion of thermoplastic or thermosetting materials

Publications (1)

Publication Number Publication Date
FR2395133A1 true FR2395133A1 (en) 1979-01-19

Family

ID=9192427

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7719182A Withdrawn FR2395133A1 (en) 1977-06-22 1977-06-22 Screw extrusion and mixing appts. - having cooperating grooved barrel and screw, for extrusion of thermoplastic or thermosetting materials

Country Status (1)

Country Link
FR (1) FR2395133A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2595455A (en) * 1950-03-07 1952-05-06 Nat Rubber Machinery Co Extruder
US3164375A (en) * 1955-10-14 1965-01-05 Frenkel Ag C D Apparatus for intensive mixing
FR2028126A1 (en) * 1969-01-10 1970-10-09 Uniroyal Inc
FR2358189A1 (en) * 1976-07-14 1978-02-10 Frenkel Ag C D CONTINUOUS MIXER INCLUDING AT LEAST ONE MIXING ZONE

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2595455A (en) * 1950-03-07 1952-05-06 Nat Rubber Machinery Co Extruder
US3164375A (en) * 1955-10-14 1965-01-05 Frenkel Ag C D Apparatus for intensive mixing
FR2028126A1 (en) * 1969-01-10 1970-10-09 Uniroyal Inc
US3632255A (en) * 1969-01-10 1972-01-04 Uniroyal Inc Extrusion apparatus
FR2358189A1 (en) * 1976-07-14 1978-02-10 Frenkel Ag C D CONTINUOUS MIXER INCLUDING AT LEAST ONE MIXING ZONE

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Legal Events

Date Code Title Description
ST Notification of lapse