GB843320A - Process and apparatus for the extrusion of thermoplastic material - Google Patents
Process and apparatus for the extrusion of thermoplastic materialInfo
- Publication number
- GB843320A GB843320A GB21483/58A GB2148358A GB843320A GB 843320 A GB843320 A GB 843320A GB 21483/58 A GB21483/58 A GB 21483/58A GB 2148358 A GB2148358 A GB 2148358A GB 843320 A GB843320 A GB 843320A
- Authority
- GB
- United Kingdom
- Prior art keywords
- temperature
- film
- orifice
- portions
- annular
- 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
- B29C48/30—Extrusion nozzles or dies
- B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
- B29C48/34—Cross-head annular extrusion nozzles, i.e. for simultaneously receiving moulding material and the preform to be coated
-
- 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
- B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
-
- 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
- B29C48/30—Extrusion nozzles or dies
- B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
- B29K2027/06—PVC, i.e. polyvinylchloride
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0037—Other properties
- B29K2995/0072—Roughness, e.g. anti-slip
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0037—Other properties
- B29K2995/0072—Roughness, e.g. anti-slip
- B29K2995/0073—Roughness, e.g. anti-slip smooth
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
<PICT:0843320/IV(a)/1> Tubular films are made by forcing a thermoplastic material at a first temperature high enough to keep the material plastic through an annular channel, and extruding the tubular film so formed under pressure and without changing its dimensions through an annular orifice, the surface of the film being subjected, without changing its dimensions, to a second temperature higher than the first temperature immediately before the film is forced out of the orifice. Preferably, the surface of the film is subjected to a second temperature 1-25%, especially 2-10%, higher than the first temperature for a period of 0,01-10 secs, especially 0,1 to 2 secs. Apparatus as shown comprises an extrusion head 1 having extrusion die means with successively arranged first and second portions communicating together, the first portion forming a tapered annular channel 4 and the second portion forming an annular surface with cylindrical walls 5 having heating means 8, 9, extending only immediately adjacent to the outlet of the orifice, for additionally heating the outermost end of the cylindrical walls to a temperature higher than that of the first portion. Interposed between the first and second portions may be a third portion having a smaller cross-sectional area than that of the first and second portions, (note grooves 10, 11, in parts 6, 7), whereby the flow of heat from the second portion to the first portion is limited.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH843320X | 1957-07-09 | ||
CH1183667X | 1957-07-09 | ||
CH1197597X | 1957-07-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB843320A true GB843320A (en) | 1960-08-04 |
Family
ID=27178618
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB21483/58A Expired GB843320A (en) | 1957-07-09 | 1958-07-04 | Process and apparatus for the extrusion of thermoplastic material |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR1197597A (en) |
GB (1) | GB843320A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2190035A (en) * | 1986-05-08 | 1987-11-11 | Polysystems Machinery Manufact | Film extrustion die-lip heater |
EP2917017A1 (en) * | 2012-11-09 | 2015-09-16 | Windmöller & Hölscher KG | Die device for an extrusion blow-moulding apparatus for producing a multilayered blown film |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3123699A (en) * | 1964-03-03 | Induction heated circular | ||
CA1210918A (en) * | 1983-06-28 | 1986-09-09 | Arakalgud V. Ramamurthy | Process for substantially eliminating surface melt fracture when extruding ethylene polymers |
-
1958
- 1958-07-04 FR FR1197597D patent/FR1197597A/en not_active Expired
- 1958-07-04 GB GB21483/58A patent/GB843320A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2190035A (en) * | 1986-05-08 | 1987-11-11 | Polysystems Machinery Manufact | Film extrustion die-lip heater |
US4830595A (en) * | 1986-05-08 | 1989-05-16 | Polysystem Machinery Mfg. Inc. | Die-lip heater |
US4842504A (en) * | 1986-05-08 | 1989-06-27 | Polysystem Machinery Mfg. Inc. | Lip heater for plastic extrusion die |
EP2917017A1 (en) * | 2012-11-09 | 2015-09-16 | Windmöller & Hölscher KG | Die device for an extrusion blow-moulding apparatus for producing a multilayered blown film |
US9713896B2 (en) | 2012-11-09 | 2017-07-25 | Windmöller & Hölscher Kg | Die device for an extrusion blow-moulding apparatus for producing a multilayered blown film |
Also Published As
Publication number | Publication date |
---|---|
FR1197597A (en) | 1959-12-01 |
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