JPS54145763A - Dry expansion device of plastic tube - Google Patents
Dry expansion device of plastic tubeInfo
- Publication number
- JPS54145763A JPS54145763A JP5391978A JP5391978A JPS54145763A JP S54145763 A JPS54145763 A JP S54145763A JP 5391978 A JP5391978 A JP 5391978A JP 5391978 A JP5391978 A JP 5391978A JP S54145763 A JPS54145763 A JP S54145763A
- Authority
- JP
- Japan
- Prior art keywords
- tube
- shrinkage
- plastic tube
- expansion device
- give
- 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.)
- Pending
Links
- 238000010438 heat treatment Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 238000002844 melting Methods 0.000 abstract 1
- 238000004804 winding Methods 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
- B29C61/00—Shaping by liberation of internal stresses; Making preforms having internal stresses; Apparatus therefor
- B29C61/06—Making preforms having internal stresses, e.g. plastic memory
- B29C61/08—Making preforms having internal stresses, e.g. plastic memory by stretching tubes
Landscapes
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Abstract
PURPOSE:The title expansion device designed to manufacture an expanded plastic tube with a slight longitudinal elongation continuously, by preheating and precooling a tube before thermal expansion. CONSTITUTION:The plastic tube 5 fed under a low tension is heated in the preheating part 1 at a temperature not lower than the softening point but not higher than the melting point, and precooled in the part 2 directly to give a tube shrinkage of 0%. The tube 5 is then reheated in the heating part 3 to give a negative tube shrinkage, and expanded in the part 4 so that the longitudinal elongation is about + or -0% even when produced and increased with increasing linear velocity. The difference between the supply speed V1 and the winding speed V2 is a shrinkage speed applied to the tube 5 by the parts 1 and 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5391978A JPS54145763A (en) | 1978-05-05 | 1978-05-05 | Dry expansion device of plastic tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5391978A JPS54145763A (en) | 1978-05-05 | 1978-05-05 | Dry expansion device of plastic tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS54145763A true JPS54145763A (en) | 1979-11-14 |
Family
ID=12956112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5391978A Pending JPS54145763A (en) | 1978-05-05 | 1978-05-05 | Dry expansion device of plastic tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54145763A (en) |
-
1978
- 1978-05-05 JP JP5391978A patent/JPS54145763A/en active Pending
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