GB1017398A - Apparatus for adjusting the diameter of tubular films - Google Patents
Apparatus for adjusting the diameter of tubular filmsInfo
- Publication number
- GB1017398A GB1017398A GB34011/62A GB3401162A GB1017398A GB 1017398 A GB1017398 A GB 1017398A GB 34011/62 A GB34011/62 A GB 34011/62A GB 3401162 A GB3401162 A GB 3401162A GB 1017398 A GB1017398 A GB 1017398A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bubble
- tube
- arm
- skid
- interior
- 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
- B29C48/92—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
- B29C2948/92019—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
- B29C2948/92009—Measured parameter
- B29C2948/92114—Dimensions
- B29C2948/92123—Diameter or circumference
-
- 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
- B29C2948/92619—Diameter or circumference
-
- 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)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
1,017,398. Tubular films. I.C.P.M. INDUSTRIE CHIMICHE PORTO MARGHERA S.p.A. Sept. 5, 1962, No. 34011/62. Heading B5B. A device 8 for adjusting the diameter of tubular films made by inflation comprises an injector 1 supplied with compressed gas via tube 7, a variable pressure chamber 2 communicating with the interior of the bubble 6 by a connecting tube 3-3<SP>1</SP>, and a revolvable pierced mask 4 coaxial with the injector chamber and integral with a skid or shoe 5 resting against the exterior of the bubble 6. Chamber 2 has a hole 102 the aperture of which can be increased or decreased by rotation of mask 4, fitted with a correspondong hole 104, about the surface of the shell 203. Shell 203 is carried by arm 11 which is revolvably supported by support 110, which, through location screws 10, enables the inclination of arm 11 to be adjusted. In operation, the melt enters nozzle 30 via tube 9 and is extruded to form a bubble 6, inflation gas being supplied via tube 7, chamber 2 and tube 3-3<SP>1</SP> to the bubble interior. A proportion of the gas leaks out via holes 102 and 104 which normally partially overlap. Should the bubble diminish in volume the skid 5 falls, partially or wholly closing the leak and thus increasing the pressure of the gas supplied to the interior of the bubble. Should the bubble increase in volume the skid 5 rises, further opening the leak and thus reducing the pressure of the gas supplied to the tube interior. Skid 5 may be arranged to fall under its own weight or by the action of springs. Bubble diameter may be varied by altering the inclination of the supporting arm 11, and the sensitivity of the apparatus, i.e. the promptness with which it intervenes may be adjusted by inclining the shoe arm or by adjusting the pressure exerted by the shoe arm on the tubular film.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR895597A FR1382906A (en) | 1961-04-27 | 1962-04-25 | Apparatus for automatic width adjustment of films of thermoplastic material extruded using a blowing process |
CH508562A CH423211A (en) | 1961-04-27 | 1962-04-25 | Device for the automatic adjustment of the diameter of tubular plastic films extruded by a blow molding process |
GB34011/62A GB1017398A (en) | 1962-04-25 | 1962-09-05 | Apparatus for adjusting the diameter of tubular films |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR895597A FR1382906A (en) | 1961-04-27 | 1962-04-25 | Apparatus for automatic width adjustment of films of thermoplastic material extruded using a blowing process |
GB34011/62A GB1017398A (en) | 1962-04-25 | 1962-09-05 | Apparatus for adjusting the diameter of tubular films |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1017398A true GB1017398A (en) | 1966-01-19 |
Family
ID=26195384
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB34011/62A Expired GB1017398A (en) | 1961-04-27 | 1962-09-05 | Apparatus for adjusting the diameter of tubular films |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1017398A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3700370A (en) * | 1970-03-02 | 1972-10-24 | Dow Chemical Co | Film size control apparatus |
US4049768A (en) * | 1976-04-09 | 1977-09-20 | Mobil Oil Corporation | Method for extending thermoplastic foams having smooth external skins |
US4299793A (en) * | 1978-12-25 | 1981-11-10 | Chisso Engineering Co., Ltd. | Method and apparatus for producing tubular plastic films |
CN103006184A (en) * | 2013-01-16 | 2013-04-03 | 广州大学 | Nozzle with orifices switchable at two ends |
-
1962
- 1962-09-05 GB GB34011/62A patent/GB1017398A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3700370A (en) * | 1970-03-02 | 1972-10-24 | Dow Chemical Co | Film size control apparatus |
US4049768A (en) * | 1976-04-09 | 1977-09-20 | Mobil Oil Corporation | Method for extending thermoplastic foams having smooth external skins |
US4299793A (en) * | 1978-12-25 | 1981-11-10 | Chisso Engineering Co., Ltd. | Method and apparatus for producing tubular plastic films |
CN103006184A (en) * | 2013-01-16 | 2013-04-03 | 广州大学 | Nozzle with orifices switchable at two ends |
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