The oxygen content and appearance of the copper rods produced are different due to the different processes of the two.The copper rod produced by upward drawing is called oxygen free copper rod when the oxygen content is below 10ppm;Copper rods produced by continuous casting and continuous casting are hot rolled under protective conditions, and the oxygen content is within the range of 200-500ppm, but sometimes it is also high
The mold is the device for product shaping and the last hot pressing device in the whole process of plastic extrusion. Its geometric shape, structural form and size, temperature and pressure directly determine the success or failure of cable processing. Therefore, the design, selection and thermal insulation measures of any extrusion product mold are highly valued.When extruding the insulation layer and sheath layer of wires and cables with a plastic extruder
The atomic number of copper is 29, belonging to the transition metal, with a density of 8.92g/cm3 and a melting point of 1083.4 ℃. It has good thermal conductivity and electrical conductivity. However, in humid air, the copper surface reacts with oxygen to produce Cu2 (OH) 2CO3, or copper green. Usually, copper oxidation in cable manufacturers shows that the surface is blackened. It is this copper conductor
