Method and apparatus for orienting plastic of a pipe
US5449487A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 9, 1993 |
| Grant date | Sep 12, 1995 |
| Priority date | — |
| Expiry date | Mar 9, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2023/18
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method and an apparatus for the orientation of a plastic pipe, wherein a pipe blank (2) is produced with an extruder and fed into a pipe forming apparatus provided with movable moulds (3), such as a corrugator, the pipe being conveyed forward in the corrugator with said moulds over a mandrel (4), along which the pipe is further conveyed out from the corrugator. In accordance with the invention, the plastic pipe (7) is oriented radially immediately after the corrugator by means of a conically widening mandrel (5) forming an extension of said corrugator. The invention also relates to an oriented ribbed plastic pipe produced by the method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.