Apparatus for manufacture of thermoplastics pipe
US4340344A · kind A · utility
11Cited by
4References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 10, 1980 |
| Grant date | Jul 20, 1982 |
| Priority date | — |
| Expiry date | Sep 10, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2023/22
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A mould for use in the manufacture of thermoplastics eg PVC pipe by radial expansion of a pipe blank, the mould comprising a cylindrical central portion 10 and two removable mould end portions 11, 12. The pipe blank 14 is located centrally within the mould by mandrels 13 within each mould end portion 11, 12. Water inlet/outlet ports 15, 16 are provided in each mould end portion 11, 12 to admit water to and remove it from the region between the blank 14 and the mould walls, and the mandrels 13 are hollow to permit inlet/outlet of water through the interior of the blank 14.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.