JPS5571519A - Manufacturing method for heat contractible tube preform product - Google Patents
Manufacturing method for heat contractible tube preform productInfo
- Publication number
- JPS5571519A JPS5571519A JP14486078A JP14486078A JPS5571519A JP S5571519 A JPS5571519 A JP S5571519A JP 14486078 A JP14486078 A JP 14486078A JP 14486078 A JP14486078 A JP 14486078A JP S5571519 A JPS5571519 A JP S5571519A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- preform
- tube
- preform product
- manufacturing
- 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
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
- B29C61/02—Thermal shrinking
- B29C61/025—Thermal shrinking for the production of hollow or tubular articles
-
- 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
- B29C57/00—Shaping of tube ends, e.g. flanging, belling or closing; Apparatus therefor, e.g. collapsible mandrels
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
PURPOSE:To easily demold a preform product molded, by adopting a preform mold provided with hook portions, which are free to move inward, at a tapered side thereof. CONSTITUTION:One or more narrow window-shaped hook portions 2 are cut down to a proper depth in a side surface of a preform mold 1. The preform mold 1 consists of 3 divided molds 1', 1'' and 3, the divided mold 3 having no hook portion thereat since it is a pull-out mold. Molding of a preform product is performed such that a lower end of a contractible tube is inserted all the way through to a portion indicated by the dotted line and is contracted by heating. The contractible tube starts to contract in the diameter direction, the tube being first molded in the shape of the hook portion 2. Thus, the occurrence of jumping-up can be prevented, the tube being correctly performed. After molding is complete, the pull-out mold 3 is first drawn out, the mold being demolded easily by moving inward a hinge 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14486078A JPS5571519A (en) | 1978-11-22 | 1978-11-22 | Manufacturing method for heat contractible tube preform product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14486078A JPS5571519A (en) | 1978-11-22 | 1978-11-22 | Manufacturing method for heat contractible tube preform product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5571519A true JPS5571519A (en) | 1980-05-29 |
Family
ID=15372076
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14486078A Pending JPS5571519A (en) | 1978-11-22 | 1978-11-22 | Manufacturing method for heat contractible tube preform product |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5571519A (en) |
-
1978
- 1978-11-22 JP JP14486078A patent/JPS5571519A/en active Pending
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