At present, most manufacturers of MI Cables are using this process. The sintered magnesium oxide porcelain pillars are manually loaded between the Copper Tube and the copper rod, and the final product undergoes a series of drawing and annealing. The biggest disadvantages of this cable production process are high labor intensity and low production efficiency.
The second process is called the Magnesium Oxide Powder filling method. The popular metaphor is to pour magnesium oxide powder between the vertical copper rod and the copper tube like a funnel. This processing technology can make the concentricity of the conductor and sheath better, but there are not many such production equipment in China; the magnesium oxide powder may get damp during the filling process, and the production workshop is required to be sealed and dry, and the air humidity requirements are relatively high. strict.
The third manufacturing process is the world's most advanced copper strip longitudinal welding method. The principle of this mineral insulated cable manufacturing process is that Copper Strips and Copper Rods can be welded infinitely, and the copper strip is formed by longitudinal welding to wrap the copper. Rod, pour magnesium oxide powder between the copper rod and the welded copper strip.
The main production equipment includes wire drawing Machines, extruders, cable forming machines, braiding machines, twisting machines, wire rewinding machines, wire measuring machines, wire bunching machines, etc. There are also imported advanced equipment for injecting magnesium oxide powder to process mineral insulation. Layer equipment, longitudinal copper sheathing equipment, etc.
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