Hot melt adhesive coating device and coating method for composite smooth aluminum sheathed high-voltage cables

Abstract

The invention discloses a hot melt adhesive coating device and coating method for composite smooth aluminum sheathed high-voltage cables. The coating device comprises an argon arc welding production line and a plastic extruding machine, wherein the argon arc welding production line comprises a welding gun part and a traction part; the coating device further comprises a first hot melt adhesive coating device and a second hot melt adhesive coating device; the first hot melt adhesive coating device is arranged between the welding gun part and the traction part; the first hot melt adhesive coatingdevice comprises a hot melt adhesive groove, an adhesive blocking die, a drawing die and an electric heating temperature control assembly; the hot melt adhesive groove is filled with hot melt adhesive particles; the hot melt adhesive particles are heated by the electric heating temperature control assembly to become liquid and completely immerse an aluminum sheath; the aluminum sheath enters thefirst hot melt adhesive coating device and is subjected to primary hot melt adhesive coating while being subjected to a drawing process; and the second hot melt adhesive coating device is arranged atthe front side of the inlet of the plastic extruding machine and is structurally similar to the first hot melt adhesive coating device. According to the hot melt adhesive coating device and coating method for the composite smooth aluminum sheathed high-voltage cables of the invention, secondary hot melt adhesive coating is performed in front of the plastic extruding machine, and therefore, the smooth aluminum sheath and an outer sheath are tightly integrated into a whole, and the phenomena of arching or wrinkling can be avoided during cable bending, take-up and construction.

Description

technical field [0001] The invention relates to the technical field of cable manufacture. Background technique [0002] When the existing corrugated aluminum-sheathed high-voltage cables are coated with asphalt, there will be no cable surface quality problems when the wires are taken up under normal conditions. The cable bends easily without bowing or wrinkling on the cable's curved inner jacket surface. [0003] However, when producing smooth aluminum-sheathed high-voltage cables, after the finished cable coated with asphalt on the aluminum sheath is taken up and reeled, and the phenomenon of sheath bowing is continuous, it is generally found that there is one every one meter or so, which is serious Affected the appearance of the cable product quality. After the aluminum sheath is bowed or wrinkled, it may crush the inner insulation layer of the cable after being wound up, causing the cable to fail the factory test; More seriously, it will endanger the safe operation of ...

AI Technical Summary

Problems solved by technology

[0003] However, when producing smooth aluminum-sheathed high-voltage cables, after the finished cable coated with asphalt on the aluminum sheath is taken up and reeled, and the phenomenon of sheath bowing is continuous, it is generally found that there is one every one meter or so, which is serious Affected the quality of cable appearance products

After the aluminum sheath is bowed or wrinkled, it may crush the inner insulation layer of the cable after being wound up, causing the cable to fail the factory test; More serious, it will endanger the safe operation of the cable

After several trial productions, the bowing phenomenon of the sheath when the smooth aluminum sheath is coated with asphalt still cannot be eliminated

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