ES478833A1 - Controlling blown film width - Google Patents
Controlling blown film widthInfo
- Publication number
- ES478833A1 ES478833A1 ES478833A ES478833A ES478833A1 ES 478833 A1 ES478833 A1 ES 478833A1 ES 478833 A ES478833 A ES 478833A ES 478833 A ES478833 A ES 478833A ES 478833 A1 ES478833 A1 ES 478833A1
- Authority
- ES
- Spain
- Prior art keywords
- strip
- air
- edge
- apertures
- aperture
- 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
- 230000001419 dependent effect Effects 0.000 abstract 1
- 230000000873 masking effect Effects 0.000 abstract 1
- 230000000284 resting effect Effects 0.000 abstract 1
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
- B29C48/92—Measuring, controlling or regulating
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92009—Measured parameter
- B29C2948/92114—Dimensions
- B29C2948/92133—Width or height
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92323—Location or phase of measurement
- B29C2948/92428—Calibration, after-treatment, or cooling zone
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92514—Pressure
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92609—Dimensions
- B29C2948/92628—Width or height
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92904—Die; Nozzle zone
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92923—Calibration, after-treatment or cooling zone
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
A device for maintaining the width of an extruded blown film 6 and to cool it, the cooled film thereafter being flattened into a double thickness strip, comprising two plates 10 and 12 between which the strip passes with one edge thereof resting on a reference face 14, identical apertures 15 and 16 being provided opposite each other in each plate in the vicinity of the edge of the strip opposite 14, one of said apertures being connected to a pipe feeding compressed air at a predetermined pressure, the other receiving air exhausted from said one aperture, the amount of exhausted air entering the other aperture being dependent upon the degree of masking of the apertures by the edge of the strip, the pressure of air in the exhaust aperture being utilised to control the air supplied to the centre of the die thereby effecting the width of the strip produced by the die.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CM5647778 | 1978-04-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
ES478833A1 true ES478833A1 (en) | 1979-08-01 |
Family
ID=4574624
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES478833A Expired ES478833A1 (en) | 1978-04-21 | 1979-03-21 | Controlling blown film width |
Country Status (8)
Country | Link |
---|---|
BE (1) | BE875721A (en) |
CH (1) | CH627964A5 (en) |
DE (1) | DE2911235A1 (en) |
ES (1) | ES478833A1 (en) |
FR (1) | FR2423323A1 (en) |
GB (1) | GB2019306B (en) |
IT (1) | IT1112250B (en) |
PT (1) | PT69457A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102019127455A1 (en) * | 2019-03-29 | 2020-10-01 | Windmöller & Hölscher Kg | Transporting a film tube, blown film system and method for producing a film |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1030187A (en) * | 1964-03-05 | 1966-05-18 | Canadian Ind | Layflat tubular film manufacture |
US3992107A (en) * | 1975-08-27 | 1976-11-16 | Union Carbide Corporation | Automatic flat width control |
-
1979
- 1979-03-19 GB GB7909557A patent/GB2019306B/en not_active Expired
- 1979-03-21 ES ES478833A patent/ES478833A1/en not_active Expired
- 1979-03-22 DE DE19792911235 patent/DE2911235A1/en active Granted
- 1979-04-09 PT PT69457A patent/PT69457A/en unknown
- 1979-04-11 CH CH347179A patent/CH627964A5/en not_active IP Right Cessation
- 1979-04-19 IT IT21994/79A patent/IT1112250B/en active
- 1979-04-20 BE BE0/194723A patent/BE875721A/en not_active IP Right Cessation
- 1979-04-20 FR FR7910965A patent/FR2423323A1/en active Granted
Also Published As
Publication number | Publication date |
---|---|
GB2019306A (en) | 1979-10-31 |
BE875721A (en) | 1979-10-22 |
DE2911235A1 (en) | 1979-12-06 |
PT69457A (en) | 1979-05-01 |
GB2019306B (en) | 1982-11-10 |
DE2911235C2 (en) | 1989-05-03 |
FR2423323B1 (en) | 1984-02-17 |
IT7921994A0 (en) | 1979-04-19 |
CH627964A5 (en) | 1982-02-15 |
IT1112250B (en) | 1986-01-13 |
FR2423323A1 (en) | 1979-11-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FD1A | Patent lapsed |
Effective date: 19971001 |