Twin Screw Extruder for Cable Compounding

The process of cable compounding can be categorized into three sections as follows:Silane XLPE cable compounding (two step and suitable for cable below 10kv)Peroxide XLPE cable compounding (for cable 10-35kv)HFFR (Halogen Free Flame Retardant) cable Compounding1. Silane XLPE cable compounding (two step and suitable for cable below 10kv)Basic formula for compound A:98% LLDPE/LDPE+GL+GMThe procedure involves a loss in weight feeding system, followed by a high torque twin screw extruder, and finally, water ring die face pelletizing.Parameters:ModelScrew Diameter (mm)L/DScrew RPMMain Motor KWTorque Grade T/N3Output kg/hHT-6362.432-68300-900110-31512.3350-1000HT-727132-68300-900160-45011.8600-2000HT-858132-68300-900220-63011.2800-2500HT-959332-68300-900355-90011.81200-3000The fundamental recipe for compound B consists of 95% LLDPE combined with an antioxidant and GL.To produce compound B, the standard method involves using a twin screw extruder and then cooling the resulting strands with water before pelletizing.Parameters:ModelScrew Diameter (mm)L/DScrew RPMMain motor KWTorque Grade T/N3Capacity kg/hSHJ-303032-68400/500/600115.85-50SHJ-3635.632-68500/600/700/80015-18.5-225.720-80SHJ-4241.232-68500/600/700/80022-30-375.750-120SHJ-5050.532-68500/600/700/80037-45-555.880-200Then mix 95% of compound A and 5% compound B material for the XLPE Cable extrusion2. Peroxide XLPE cable compounding (for cable 10-35kv)

Basic formula:

LDPE+DPC+antioxidant

Process:

Loss in weight feeding system -> two stage extruder ->eccentric die face pelletizing

Note:

Final granules need to be dried.

Workshop must be air purification treatment.

Parameters:

3. HFFR (Halogen Free Flame Retardant) Cable Compounding

Basic formula:

PE+ATH

Process:

Kneader -> conveyor -> conical twin screw feeder -> two stage extruder -> air cooling die face cutting

Parameters: