Wire and Cable Extrusion Working Principle

During cable extrusion process, the outer cable sheathing surface of the plastic wire and cable must be printed with permanent identification marks such as the manufacturer's name, model, specifications, manufacturing length, and manufacturing year. . The printing method of the identification mark can be embossed on the cable sheathing by the word wheel block, or printed on the surface of the sheath by the ribbon block, or printed by ink. The printing should be clear and continuous.

It is suitable for medium and high voltage single core or multiple core power cable sheath of extruded and double layer extruded at a time. Suitable material for PVC,PE,low smoke zero halogen,conductive PVC,and conductive PE and so on.

The plastic insulation and sheath of the wire and cable are made by continuous extrusion. The wire and cable extrusion equipment is generally with a single screw extruder.

Before the plastic is extruded, check whether the plastic is damp or other debris beforehand, and then preheat the screw and add it to the hopper. During the extrusion process, the plastic loaded into the hopper enters the barrel by gravity or feed screw, and under the thrust of the rotating screw, it continuously advances and gradually moves from the preheating section to the homogenization section; at the same time, the plastic stirred and squeezed by the screw, and transformed into a viscous flow state under the action of the external heat of the barrel and the shear friction between the plastic and the device, forming a continuous and uniform material flow in the screw groove.

Under the action of the temperature specified in the process, the plastic changes from solid state to plastic object in molten state, and then the plastic is pushed into the machine head by the screw or stirring; The material flow to the machine head, through the annular gap between the die core and the die sleeve, is extruded from the die socket and squeezed around the conductor or wire core to form continuous dense insulation layer or sheath layer of extruded wire and cable , and then after cooling and curing, the wire and cable products are made.

Wire and Cable Extrusion Line Application

It is suitable for medium and high voltage single core or multiple core power cable sheath of extruded and double layer extruded at a time. Suitable material for PVC,PE,low smoke zero halogen,conductive PVC,and conductive PE and so on.

This equipment line can be used for loose tube punching oil gysts cable in the production of inner and outer sheath, at the same time it also can be used for parallel twin wire center tube type cable totally medium messenger aerial cable extruction production.

Main parameter for wire and cable extrusion