Multi-layer coextrusion device and application method thereof

Abstract

The invention discloses a multi-layer coextrusion device and an application method thereof. The multi-layer coextrusion device comprises a machine head, an active paying-off machine, a conductor paying-off disc, a dance wheel, a heater, a coextrusion machine head, a constant-temperature water tank, a traction device and a winding disc. The coextrusion machine head comprises a composite module, a shell, a front gland and a rear gland. The composite module comprises a die core supporting sleeve, a wire inlet positioning module, an inner conductor layer module, a PTC layer module and an insulation layer module. The PTC layer module comprises a PCT wrapping die and a sizing die. The position, at the PTC layer module, of the die core supporting sleeve is provided with a first annular boss. ThePCT wrapping die is provided with a first linkage part to be matched with the first annular boss, and the PCT wrapping die is in sliding connection with the sizing die. According to the multi-layer coextrusion device and the application method thereof, through the arrangement of a first gear set and a second gear set, reverse rotation of the PTC layer module and the insulation layer module is achieved, and fixation between a PTC heating body layer and a composite insulation layer is tighter.

Description

Technical field [0001] The invention relates to the field of wire and cable manufacturing equipment, in particular to a multi-layer co-extrusion device and a method of use thereof. Background technique [0002] For heating cables, three-layer co-extrusion devices have been commonly used in the domestic cable industry, and some domestic manufacturers also refer to imported three-layer co-extrusion devices for manufacturing. As for the dual-core double-layer structure ribbon cable commonly used in the fields of communications, petrochemicals and household appliances, imported and some domestic manufacturers mostly use the head of the ring-shaped feed channel three-layer co-extrusion device to manufacture, generally through The production process of layered multiple extrusion coatings first coat the two core structures with one layer of composite and then coat more than two layers of composite; for example, first coat a layer of coating on the conductor, and then The two wire cores...

AI Technical Summary

Problems solved by technology

The disadvantage of this process is that if a compact compression mold is used when wrapping the compound multiple times, the inner mold is easy to scratch the first layer of cladding, and because each layer of cladding is easily polluted due to multiple wrapping, and the positioning It is not allowed to be easily eccentric; if the extrusion die is used, it mainly depends on the characteristics of the material of the wrapping itself to achieve a good fixation between the wrapping, the metal inner core, and the PTC inner core. Short circuit and mismatch occur after using for a long time

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