Low-voltage Power Cable Extrusion Line

Low-voltage Power Cable Extrusion Line

The low-voltage power cable extrusion production line is a complete set of equipment specifically designed for manufacturing insulated cores and protective sheaths of power cables rated at 0.6/1 kV and below. Its core process involves melting solid plastics (such as PVC or XLPE) through heating and pressurization, then continuously and uniformly coating conductors (copper/aluminum wires) or assembled cable cores. After cooling and solidification, a smooth, dense, and uniformly thick insulating layer or protective sheath is formed.
Common Types of Low-Voltage Power Cables

GB Standard	IEC Standard	UL/ANSI Standard
VV	NA2XY	THHN
YJV	NA2XSY	XHHW-2
YJLV	H07Z-U	USE-2
VV22	NAYY	MTW
YJV22	NA2XY-J	RHW-2
WDZA-YJY	/	/
NH-YJV	/	/

Low-voltage Power Cable Extrusion Line

Core Components

A power cable extrusion production line is a highly coordinated automated system, primarily consisting of the following major components:
Pay-off Unit:
Supports and releases the conductor or cable core, providing stable and controllable tension to prevent thinning or twisting of the conductor.
Preheater:
Heats the conductor before it enters the die head to remove moisture, reduce internal stress, and improve adhesion between the plastic and the conductor.
Extruder:
Screw: Conveys, compacts, melts, and homogenizes the plastic.
Barrel: Heats and cools the plastic.
Drive Motor: Provides power to the screw.
Die Head: Connects the extruder to the die.
Die (Tip and Die): Determines the thickness, concentricity, and shape of the extruded layer.
Cooling Trough:
Rapidly cools and solidifies the high-temperature cable. Typically features segmented temperature control to ensure material stability and avoid internal stress.
Haul-off Unit:
Provides the driving force for the production line. Its speed must be extremely stable, as it is critical for ensuring uniform extrusion thickness.
Spark Tester:
An online quality inspection device that applies high voltage to the insulating layer to detect defects such as pinholes or impurities, triggering alarms and marking the locations.
Take-up Unit:
Winds the finished cable neatly onto a reel, maintaining constant tension and synchronizing with the haul-off speed.
Control System:
Uses a PLC / industrial computer to centrally control all parameters (temperature, speed, tension, etc.), ensuring stable and reproducible production.

Low-voltage Power Cable Extrusion Line Datasheet

Model	50	70	80	90	100	120	150
Screw Diameter (mm)	φ50	φ70	φ80	φ90	φ100	φ120	φ150
Screw L/D Ratio	26:1	26:1	26:1	26:1	25:1	25:1	25:1
Extrusion Amount (kg/hr)	70	140	200	250	320	450	650
Outlet Wire (mm)	0.8-5	2-15	3-25	5-35	8-60	10-80	15-120
Total Power (KW)	25	40	55	63	120	165	220
Production Speed(Max., m/min)	300	300	200	200	100	80	60
Take-up Spool	400/630	500/800	800/1250	800/1600	1000/2000	2000/2500	2500/3150
Storage Length	240 m	240 m	200 m	180 m	0	0	0

Low-voltage Power Cable Extrusion Line Application

The low-voltage power cable extrusion production line is a complete set of equipment specifically designed for producing insulation cores and sheaths of power cables with rated voltage of 0.6/1kV and below. The details are as follows:

Conductor Insulation

Function: Extrudes insulating material onto copper or aluminum conductors to form the primary insulation layer.
Common Materials: Cross-linked polyethylene (XLPE), polyethylene (PE), polyvinyl chloride (PVC), etc.
Requirements: Uniform thickness, high concentricity, absence of impurities, and no microvoids. The insulation extrusion process for high-voltage cables demands the highest technical precision.

Sheathing Extrusion

Function: Extrudes a protective sheath over the assembled cable core.
Purpose: Provides mechanical protection, corrosion resistance, moisture resistance, UV resistance, flame retardancy, etc.
Common Materials: Polyvinyl chloride (PVC), polyethylene (PE), polyolefins, etc.