The process is as follows: Drawing - - insulation - Sparks - skein cable (steel) - copper rod sheath -- pressure test: low voltage cable packing 1. drawing general into the over all 7.00-8.00mm drawing machine drawing machine, even forming a drawing annealing, also drawing machine drawing light and then annealing, now drawing machines are formed in one time. The drawing order of the drawing die is: 7.00-6.55-5.39-4.49-3.43-2.76-2.56-2.26-2.10-1.78. (recommended). This set of matching dies is the most efficient. If you want to pull the middle model, just change the sizing die. Wire drawing machine and annealing wheel are required to draw oil, to prevent wire breaking and oxidation. 2. will pull the wire twisted disk to cage cage, generally divided into four sections, respectively 8+12+16+25 (frame winch), some tight die (round), and some die (fan, tile) 3. insulated cable insulation PVC insulated with crosslinked polyethylene insulation. PVC insulation colors are deployed, and can be directly out of insulation. XLPE color is milky white, with adjustable color masterbatch. Here is the quality control point. 4. sparks to prevent insulation when there is a break, so there is spark machine in order to check the quality of cables. If there is a break, it can be found repaired in time. 5., the cable will be a good insulation wire core twisted together, the circular insulation core without considering the transition, only a few insulated wire core left some gaps filled, so that twisted semi-finished products round. To consider the problem of transition, the twisted wire cores must be twisted together according to the specified shape so as to make them rounded. Without a coat, you can only wrap one layer of PP. If you want to tie the steel belt, you need to wrap a plastic band, and then tie the steel belt, but one process is done. The 6. sheath is filled with the PVC sheath material and is heated by the body head to a suitable temperature to extrude the finished low voltage cable to cool down the upper shaft. 7. pressure test, low voltage withstand test, are using 3.5KV voltage, suppress 5 minutes. 8. product packaging will play two pressure not finished sheath sawed off, head, let the head tie, sealing packing cloth will withstand test certificate for shaft. As of here, one axle low voltage cable is so fresh!