Start-up method for controlling outside diameter of insulated el

Details Start-up method for controlling outside diameter of insulated el Start-up method for controlling outside diameter of insulated el

1994-03-23

1995-07-11

Vargot, Mathieu D.

Plastic and nonmetallic article shaping or treating: processes

With measuring, testing, or inspecting

264 39, 264 407, 264174, 264473, 425113, 425141, B29C 4702, B29C 4792

Patent

active

054318670

ABSTRACT:
Methods of and apparatus for controlling a startup process of a wire insulating line until a desired outside diameter of an insulated wire is obtained. A startup control apparatus according to the invention comprises an extruder for supplying an insulating material around a core conductor, a take-up device for taking up the insulated wire, a diameter measuring device for measuring an outside diameter of the insulated wire and a processor for monitoring and controlling the line startup process. In a method of controlling the startup process of the wire insulating line, the processor calculates a target speed ratio r between the extruder and take-up device, performs a first correction in which a demanded take-up speed CA' is increased by a predetermined increment .DELTA.CA if a measured wire diameter D is equal to or greater than a target wire diameter D.sub.0, followed by a second correction in which a demanded extruder speed EX' is increased by a predetermined increment .DELTA.Emax only if a target extruder speed x obtained by multiplying the increased demanded take-up speed CA' by the target speed ratio r is greater than the demanded extruder speed EX'.

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