GB755983A - Improvements in and relating to the production of film - Google Patents
Improvements in and relating to the production of filmInfo
- Publication number
- GB755983A GB755983A GB3592/54A GB359254A GB755983A GB 755983 A GB755983 A GB 755983A GB 3592/54 A GB3592/54 A GB 3592/54A GB 359254 A GB359254 A GB 359254A GB 755983 A GB755983 A GB 755983A
- Authority
- GB
- United Kingdom
- Prior art keywords
- die
- annular
- plane
- tubular film
- round
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
Tubular film of a synthetic organic thermoplastic material is extruded through the peripheral orifice of an annular extrusion channel formed between the plane horizontal surface of an annular die and an opposed parallel die plate, which plate has no projections beyond the plane of its extrusion surface. The die plate is preferably detachably mounted on a core positioned within the annular die. As shown, the peripheral orifice 7 is defined by the horizontal end surface 2 of the annular die 1, and the horizontal surface 5 of die plate 4 which is secured to the core 3 with the interposition of a resilient ring 12. Material to be extruded is fed through the connection 13 into the annular space between the die 1 and core 3. The construction facilitates maintenance of a specified gap round the whole of the peripheral orifice, particularly after re-grinding or re-polishing the extrusion surfaces, since the surfaces concerned are plane. Any slight variations in the gap may be compensated by providing a slightly flexible lip 21 round the die 1, whose position may be varied by adjusting a series of bolts 22 extending round the periphery. Inflating air may be introduced through the axial bore 14. The tubular film is preferably cooled by flowing a cooling liquid over its exterior as it passes downwardly through a suitable passageway. Examples describe the production of tubular film from polyethylene terephthalate and polythene. Specification 741,963 is referred to.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3592/54A GB755983A (en) | 1954-02-08 | 1954-02-08 | Improvements in and relating to the production of film |
ES0219776A ES219776A1 (en) | 1954-02-08 | 1955-01-27 | Improvements in and relating to the production of film |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3592/54A GB755983A (en) | 1954-02-08 | 1954-02-08 | Improvements in and relating to the production of film |
Publications (1)
Publication Number | Publication Date |
---|---|
GB755983A true GB755983A (en) | 1956-08-29 |
Family
ID=9761247
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3592/54A Expired GB755983A (en) | 1954-02-08 | 1954-02-08 | Improvements in and relating to the production of film |
Country Status (2)
Country | Link |
---|---|
ES (1) | ES219776A1 (en) |
GB (1) | GB755983A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2125332A (en) * | 1982-07-09 | 1984-03-07 | Alfredo Cavalli | An extruder for extruding pasta in the form of a thin continuous strip |
-
1954
- 1954-02-08 GB GB3592/54A patent/GB755983A/en not_active Expired
-
1955
- 1955-01-27 ES ES0219776A patent/ES219776A1/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2125332A (en) * | 1982-07-09 | 1984-03-07 | Alfredo Cavalli | An extruder for extruding pasta in the form of a thin continuous strip |
Also Published As
Publication number | Publication date |
---|---|
ES219776A1 (en) | 1955-03-16 |
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