Method for manufacturing a multilayer plastic pipe
US6251332A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 14, 1997 |
| Grant date | Jun 26, 2001 |
| Priority date | — |
| Expiry date | Mar 14, 2017 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05C2225/08
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for manufacturing a multilayered plastic pipe particularly suitable for use as an intake manifold of an internal combustion engine is provided. The method includes the steps of forming a hollow plastic core, providing at least one spacer member on the hollow plastic core, supplying a molten plastic material into a mold cavity and applying a compression force to the material inside the cavity to form an outer layer integrally on the outer peripheral surface of the hollow plastic core. The spacer member prevents the hollow plastic core in the mold cavity from being deformed when a molten plastic material is supplied into the mold cavity under pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.