Method for the production of thermoplastic tubes
US4663107A · kind A · utility
41Cited by
11References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 14, 1985 |
| Grant date | May 5, 1987 |
| Priority date | — |
| Expiry date | Jun 14, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2995/0072
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for the production of thermoplastic tubes comprising: (1) extruding the thermoplastic tube of which the interior surface in a molten state by a heating unit disposed within the area of a mandrel near the nozzle of an extrusion mold, and (2) sliding the interior surface of the tube on an additional mandrel supported to the front end of the mandrel through a heat-insulating material in axial alignment with the hollow mandrel in a manner to bring the interior surface of the tube into contact with the smooth surface of the additional mandrel and simultaneously cooling the interior surface of the tube with a cooling medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.