GB783723A - Extraction-extrusion process and apparatus for plastic material - Google Patents
Extraction-extrusion process and apparatus for plastic materialInfo
- 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
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.
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)
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 |
-
1955
- 1955-06-01 GB GB15765/55A patent/GB783723A/en not_active Expired
- 1955-06-11 FR FR1132533D patent/FR1132533A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR1132533A (en) | 1957-03-12 |
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