Production of silane crosslinked cable and pipe is done in a long L/D twin screw extruder while single screw extruder is for low temperature/pressure build up and pelletizing.
Production Line for Silane Crosslinked Cable and Pipe
1.material hopper, 2.drying hopper 3. Molecular-sieve dryer 4.material stank 5. Loss-in-weight pump 6.loss-in-weight feeder 7.twin screw extruder 8. Water-ring pelletizer 9.centrifugal dewatering 10. Fluidizing bed 11. Vacuum material conveyer 12. Molecular-sieve dryer 13.drying hopper 14. Product container 15.vacuum bagging
Functional steps of material plasticating / mixing and silane grafting are carried out in a long L/D co-rotating twin screw extruder while single screw extruder is used for low temperature/pressure build up and pelletizing. This tandem line has a larger processing window than any single stage line.
Two-Step Extrusion Pelletizing Equipment For Silane XLPE Cable Below 10KV
Description of two-step production process
The silane is grafted onto the PE main chain by DCP as an initiator, and the grafting A material is finished on the compounding extruder. At the same time, the catalyst masterbatch (containing PE, catalyst, antioxidant) B is completed on a compounding extruder or a small size compounding extruder. According to the proportion of 95:5, the A and B materials are mixed evenly, the extrusion discharge is completed on the single screw extruder, and then the finished product is crosslinked in warm water.
Process flow chart for A material equipment
Process flow chart for B material equipment