Method for extruding a cross-linked material
US4234531A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 1, 1979 |
| Grant date | Nov 18, 1980 |
| Priority date | — |
| Expiry date | Feb 1, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2301/10
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of extruding a cross-linked material, more particularly an insulating cross-linked material around an electrical cable. In an extrusion machine comprising a housing terminated with an extrusion head and provided with a filtering means adjacent the outlet end of said housing, the cross-linkable product is fed without addition of a cross-linking agent, said cross-linking agent being first introduced in said cross-linkable material downstream said filtering means. The cross-linkable material is kept in the housing at an elevated temperature to be in a fluid state, the cross-linking agent being introduced at a temperature slightly lower than its reaction temperature, whereby the extrudate may be at a temperature near the maximum temperature admissible for the extrusion of said material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.