JPS55103932A - Apparatus for producing biaxially stretched tubular plastic film - Google Patents
Apparatus for producing biaxially stretched tubular plastic filmInfo
- Publication number
- JPS55103932A JPS55103932A JP1237879A JP1237879A JPS55103932A JP S55103932 A JPS55103932 A JP S55103932A JP 1237879 A JP1237879 A JP 1237879A JP 1237879 A JP1237879 A JP 1237879A JP S55103932 A JPS55103932 A JP S55103932A
- Authority
- JP
- Japan
- Prior art keywords
- hot air
- section
- detector
- air blower
- plastic film
- 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.)
- Granted
Links
Landscapes
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
PURPOSE: To obtain a biaxially stretched tubular plastic film of a high thickness uniformity, by using a hot air blower ring which is adapted to supply hot air to such a portion of a plastic tube material that is immediately before a stretching zone and which is divided into several sections to allow the temperature of hot air from each section to be regulated in accordance a lateral displacement of the plastic tube material, whereby the stretching bubble can be stabilized.
CONSTITUTION: The eccentricity of a starting tube 1 is detected by detector unit 7 (7-1W7-4), from which a signal is sent to a regulator 8, whereby the temperature of a section regulation heater unit 9 is regulated. The detector 7-1 is opposed to a section 9-1 of a hot air blower ring 6, the detector 7-2 to a section 9-2, and so on. Air is supplied to the hot air blower ring 6 by a blower 12. The air from the blower 12 is heated to a predetermined temperature by a heater 10 in cooperation with a thermometer 11 so as to be fed to each section of the hot air blower ring 6 separately. Even when a starting tube has unavoidable or uncontrollable overs and shorts in thickness, and even when a starting tube is heated in an unbalanced manner, it can be stretched stably so that a product of an excellent quality can be obtained.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1237879A JPS55103932A (en) | 1979-02-06 | 1979-02-06 | Apparatus for producing biaxially stretched tubular plastic film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1237879A JPS55103932A (en) | 1979-02-06 | 1979-02-06 | Apparatus for producing biaxially stretched tubular plastic film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55103932A true JPS55103932A (en) | 1980-08-08 |
| JPS5730369B2 JPS5730369B2 (en) | 1982-06-28 |
Family
ID=11803602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1237879A Granted JPS55103932A (en) | 1979-02-06 | 1979-02-06 | Apparatus for producing biaxially stretched tubular plastic film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55103932A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5911962U (en) * | 1982-07-14 | 1984-01-25 | 株式会社土屋製作所 | roll over valve |
| JPS60159880U (en) * | 1984-03-31 | 1985-10-24 | ダイハツ工業株式会社 | Fuel spill prevention valve |
| AU610366B2 (en) * | 1988-03-31 | 1991-05-16 | Idemitsu Petrochemical Co., Ltd. | Method of and apparatus for manufacturing biaxially oriented film |
-
1979
- 1979-02-06 JP JP1237879A patent/JPS55103932A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5730369B2 (en) | 1982-06-28 |
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