Method for lubricating cable in a dry curing system
AssigneeSouthwire Company
InventorsBobby A. Rowland, Stanley L. Tate, Michael C. Smith
Life of this patent
Estimating the term…
Abstract
Disclosed is a method for continuously lubricating cable during continuous dry curing of cable insulation and insulation shield to reduce friction between the cable surface and the dry curing apparatus, thereby eliminating cable oscillation and vibration and increasing product quality and the speed of production, comprising coating insulation compound pellets and insulation shield compound pellets with incompatible lubricant immediately prior to extrusion of insulation and insulation shield on to the cable.
Claims17
A method of continuously fabricating finished electrical conductor comprising the steps of:
- (a) providing an insulation compound and an insulation shield compound provided that particles of at least one of said compounds has absorbed thereon uniformly dispersed incompatible lubricant;
- (b) immediately extruding said lubricant, said insulation compound and said insulation shield compound onto an advancing elongated electrical conductor;
- and
- (c) immediately passing said insulated and insulation shielded electrical conductor through a dry curing apparatus for vulcanization thereof provided that said incompatible lubricant migrates to the outer surface of said insulated and insulation shield electrical conductor to reduce the coefficient of friction between the outer surface of said conductor and the inner surface of said dry curing apparatus at points where said surfaces meet said insulated and insulation shielded conductor hanging in a catenary so that said insulated and insulation shielded conductor drags against the vulcanization apparatus.
Dependencies are inferred from the claim text.