METHOD OF CABLE PRODUCTION Russian patent published in 2008 - IPC H01B13/14 

FIELD: electrical engineering.

SUBSTANCE: invention relates to the method of producing the cable composed of a conductor, an inner semi-conducting layer with thickness smaller than or equal to 0.4 mm, an insulating layer enveloping the said inner semi-conducting layer. The proposed method includes the stage of co-extrusion of the inner semi-conducting and insulating layers. The aforesaid stage comprises making the first circular flux of the inner semi-conducting layer and the second circular flux of the insulating layer, bringing the said first circular flux outer surface in contact with the said circular flux inner surface at a certain axial distance from the contact point of the aforesaid surfaces. The method comprises also the combination of the preset feed rate and the said contact point in the function of semi-conducting and insulating material dynamic viscosity (η) allowing the interrelation between the tangential strain of the inner semi-conducting layer nearby the radial inner wall of the extrusion die and the tangential strain of the insulating layer nearby the extrusion die radial outer wall makes from 0.5 to 4. The method includes also the pressure extrusion of the insulating and outer semi-conducting layers onto the conductor.

EFFECT: miniature cable conductor retaining good general mechanical and electrical properties.

22 cl, 5 dwg, 5 tbl, 5 ex