Apparatus and method for adjusting a mandrel and kernel while producing a plastic pipe
US6210617A · kind A · utility
1Cited by
5References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 25, 1998 |
| Grant date | Apr 3, 2001 |
| Priority date | — |
| Expiry date | Aug 25, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2023/003
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The present invention relates to an apparatus for producing pipes of a moldable material, preferably plastic, comprising an extruder, a cylindrical mold comprising chill molds (4, 5), a mandrel (8) inside the extruder and a kernel (9) as an extension of the mandrel. The mandrel is attached at its front end to the extruder. The mandrel (8) and the kernel (9) can be kept concentric with the extruder and the mold if the mandrel and the kernel are joined to each other in such a manner that the angle between their center lines is adjustable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.