Method for controlling a foam resin cable coating extrusion proc

Details Method for controlling a foam resin cable coating extrusion proc Method for controlling a foam resin cable coating extrusion proc

1983-11-15

1986-06-03

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

With measuring, testing, or inspecting

264 407, 264 459, 264174, 425113, 425140, 425145, 425817C, B29C 4792, B29C 4702, B29C 6722

Patent

active

045928819

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.

REFERENCES:
patent: 3799719 (1974-03-01), Bonikowski et al.
patent: 3896198 (1975-07-01), Utumi et al.
patent: 3914357 (1975-10-01), Cereijo et al.
patent: 4229392 (1980-10-01), Shimano et al.

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