Method for controlling a foam resin cable coating extrusion process
US4592881A · kind A · utility
7Cited by
4References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 15, 1983 |
| Grant date | Jun 3, 1986 |
| Priority date | — |
| Expiry date | Nov 15, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/3462
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for controlling a cellular foam cable coating extrusion process wherein the quench point or temperature of the foamed coating being extruded onto the core material, and the ratio of speed of extrusion to line speed of the extrusion process are simultaneously adjusted respectively in response to two error signals indicative of a variation in relative permittivity and annular area of extruded coating from required specified values. The method results in a faster process than possible heretofore while at the same time a tighter tolerance on deviation from required parameters is possible.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.