Qualification-SHENYANG POWER CABLE FACTORY

1、 Circular extrusion type: 1. Insulation layer: (1) Weight of single wire extruded insulation layer Diameter D0=D+2t mm Section F=π (d+t) t mm2 Weight W=π (d+t) t * r (kg/km) Weight of N single wire extruded insulation layers: W=π（d+t）t*r*N*K （kg/km） (2) Stranded wire (or bundle wire) core edge gap without filling, extruded insulation layer weight: 1) Squeezing W=[π (D+t) t+Q1] r * N * K (kg/km) 2) Longitudinal package W=[π (D+t) t+4/5 * Q1] r * N * K (kg/km)

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2020-09

Temperature Control of Extruder

The cooling device is set to ensure that the plastic is within the temperature range required by the process. Specifically, it is to eliminate excess heat generated by shear friction during screw rotation, in order to avoid the difficulty of plastic decomposition, charring, or shaping due to high temperatures. Machine barrel cooling is divided into two types: water cooling and air cooling. Generally, air cooling is more suitable for small and medium-sized extrusion machines, while for large machines, water cooling or a combination of the two forms of cooling are often used; The screw cooling mainly adopts central water cooling, with the aim of increasing the solid conveying rate of materials, stabilizing the glue output, and improving product quality; But the cooling at the hopper is to strengthen the conveying effect of solid materials, prevent plastic particles from sticking and blocking the material outlet due to temperature rise, and to ensure the normal operation of the transmission part.

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2020-09

Analysis of Extrusion Mold

The mold core and mold sleeve are extrusion molding molds, which are fixed on the mold core seat. Their function is to fix and support the wire core or cable core, forming a circular shape for the plastic, and entering the mold sleeve in a certain direction. The relative position of the mold core and mold sleeve is adjusted by adjusting the bolts of the mold core seat. The mold sleeve is fixed to the machine head with the help of the mold sleeve cover, and the function of the mold sleeve is to allow plastic to enter the hole channel for molding through the gap formed between its inner cone hole and the outer cone of the mold core.

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