JPS5619727A - Method and device for forming plastic film - Google Patents
Method and device for forming plastic filmInfo
- Publication number
- JPS5619727A JPS5619727A JP9487279A JP9487279A JPS5619727A JP S5619727 A JPS5619727 A JP S5619727A JP 9487279 A JP9487279 A JP 9487279A JP 9487279 A JP9487279 A JP 9487279A JP S5619727 A JPS5619727 A JP S5619727A
- Authority
- JP
- Japan
- Prior art keywords
- cooling air
- bubble
- ringlike
- film
- die
- 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
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
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/911—Cooling
- B29C48/9115—Cooling of hollow articles
- B29C48/912—Cooling of hollow articles of tubular films
- B29C48/913—Cooling of hollow articles of tubular films externally
-
- 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)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
PURPOSE:To enable the large discharge quantity and high-speed extraction of a film by a method wherein ringlike cooling air is blown against and made to contact with bubbles in the course of swelling so as to promote and balance the expansion of the film in the forming of the film by an inflation method. CONSTITUTION:Between a pair of dies 10 and 11 is formed a ringlike die slit 12, which discharges melted plastic like a tube. Surrounding the die slit 12, a ringlike cooling air blowout port 13 is formed. Melted plastic is discharged from the die slit 12 and, the air for expansion being blown in from the center of the die 10 and the cooling air being blown out from the cooling air blowout port 13, a bubble A is made to come close to the circumferential surface 16 of a taper. The cooling air from the outlet 13 expands thus in a taperlike manner and rises, being contacted with the surface of the bubble A, while turning to be a high-speed air stream in the narrow gap of an outside ring 15, cooling the bubble A and balancing a frost line. In addi- tion, the swelling of the bubble can be promoted by the difference in pressure produced through its lowering by the high-speed air stream.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9487279A JPS5619727A (en) | 1979-07-27 | 1979-07-27 | Method and device for forming plastic film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9487279A JPS5619727A (en) | 1979-07-27 | 1979-07-27 | Method and device for forming plastic film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5619727A true JPS5619727A (en) | 1981-02-24 |
| JPS6227983B2 JPS6227983B2 (en) | 1987-06-17 |
Family
ID=14122134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9487279A Granted JPS5619727A (en) | 1979-07-27 | 1979-07-27 | Method and device for forming plastic film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5619727A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5915518U (en) * | 1982-07-21 | 1984-01-30 | 日本ユニカ−株式会社 | Cooling device for inflation film |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51150575A (en) * | 1975-06-20 | 1976-12-24 | Mitsubishi Chem Ind | Device for forming inflation film |
| JPS53137261A (en) * | 1977-05-06 | 1978-11-30 | Japan Steel Works Ltd | Air ring in installation for making inflation film from thermoplastic resin |
-
1979
- 1979-07-27 JP JP9487279A patent/JPS5619727A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51150575A (en) * | 1975-06-20 | 1976-12-24 | Mitsubishi Chem Ind | Device for forming inflation film |
| JPS53137261A (en) * | 1977-05-06 | 1978-11-30 | Japan Steel Works Ltd | Air ring in installation for making inflation film from thermoplastic resin |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5915518U (en) * | 1982-07-21 | 1984-01-30 | 日本ユニカ−株式会社 | Cooling device for inflation film |
| JPH0120110Y2 (en) * | 1982-07-21 | 1989-06-13 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6227983B2 (en) | 1987-06-17 |
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