GB783723A - Extraction-extrusion process and apparatus for plastic material - Google Patents

Extraction-extrusion process and apparatus for plastic material

Info

Publication number
GB783723A
GB783723A GB15765/55A GB1576555A GB783723A GB 783723 A GB783723 A GB 783723A GB 15765/55 A GB15765/55 A GB 15765/55A GB 1576555 A GB1576555 A GB 1576555A GB 783723 A GB783723 A GB 783723A
Authority
GB
United Kingdom
Prior art keywords
section
port
extrusion
die
passage
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.)
Expired
Application number
GB15765/55A
Inventor
Ernest Carl Bernhardt
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
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
Priority to US425985A priority Critical patent/US2774105A/en
Application filed by EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Priority to GB15765/55A priority patent/GB783723A/en
Priority to FR1132533D priority patent/FR1132533A/en
Publication of GB783723A publication Critical patent/GB783723A/en
Expired 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
    • B29C48/76—Venting, drying means; Degassing means
    • B29C48/765—Venting, drying means; Degassing means in the extruder apparatus
    • B29C48/766—Venting, drying means; Degassing means in the extruder apparatus in 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
    • B29C48/03—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
    • B29C48/03—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
    • 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
    • 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
    • B29C48/62—Screws characterised by the shape of the thread channel, e.g. U-shaped

Landscapes

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

Abstract

<PICT:0783723/III/1> A synthetic plastic material, e.g. polymethyl methacrylate, nylon, cellulose acetate or polystyrene is extruded through a die 14 as a sheet, rod or tube and during passage through a heated extrusion chamber 1 a volatile component, e.g. a solvent or an impurity (water vapour), is removed by suction through a port 8 and passage 9 in the extrusion screw 2. The screw comprises four sections:-a feed section A, a metering section B having a large root diameter 6, an extraction section C in which the port 8 is located and the conveying capacity of the section is suddenly increased, and an extrusion section D which forces the material through the die 14. The section C is so arranged that it is not completely filled with material and thus the port 8 does not get blocked with material. The pitch may vary instead of being constant, as shown, and the barrel may have two screws which may or may not intermesh.ALSO:A synthetic plastic material, e.g. polymethyl methacrylate, nylon, cellulose acetate or polystyrene is extruded through a die 14 as a sheet, rod or tube and during passage through a heated extrusion chamber 1 a volatile component, e.g a solvent or an impurity (water vapour), is removed by suction through a port 8 and passage 9 in the extrusion screw 2. The screw comprises four sections:-a feed section A, a metering section B having a large root diameter 6, an extraction section C in which the port 8 is located and the conveying capacity of the section is suddenly increased, and an extrusion section D which forces the material through the die 14. The section C is so arranged that it is not completely filled with material and thus the port 8 does not get blocked with material. The <PICT:0783723/IV (a)/1> pitch may vary instead of being constant as shown, and the barrel may have two screws which may or may not intermesh.
GB15765/55A 1954-04-27 1955-06-01 Extraction-extrusion process and apparatus for plastic material Expired GB783723A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US425985A US2774105A (en) 1954-04-27 1954-04-27 Extraction-extrusion apparatus
GB15765/55A GB783723A (en) 1955-06-01 1955-06-01 Extraction-extrusion process and apparatus for plastic material
FR1132533D FR1132533A (en) 1955-06-01 1955-06-11 Method and apparatus for extraction and extrusion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB15765/55A GB783723A (en) 1955-06-01 1955-06-01 Extraction-extrusion process and apparatus for plastic material

Publications (1)

Publication Number Publication Date
GB783723A true GB783723A (en) 1957-09-25

Family

ID=10065072

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15765/55A Expired GB783723A (en) 1954-04-27 1955-06-01 Extraction-extrusion process and apparatus for plastic material

Country Status (2)

Country Link
FR (1) FR1132533A (en)
GB (1) GB783723A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1190171B (en) * 1958-02-03 1965-04-01 Krauss Maffei Ag Screw press for gelling monomeric and / or moist polymers
BE604594A (en) * 1960-06-02 1900-01-01
DE1579108B1 (en) * 1963-04-30 1970-11-12 Continental Gummi Werke Ag Device for the continuous molding and vulcanization of an object from a rubber mixture with natural or synthetic rubber

Also Published As

Publication number Publication date
FR1132533A (en) 1957-03-12

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