Combined type adjustment-free core shift extrusion die

Abstract

The invention belongs to the technical field of cable forming, and particularly discloses a combined adjustment-free core shift extrusion die. The combined adjustment-free core shift extrusion die comprises a die core, a first die sleeve set and a second die sleeve set, a convex ring is arranged on the periphery of the die core, and a plurality of material flowing holes are evenly distributed in the convex ring in the circumferential direction; the first die sleeve set coaxially sleeves the outer side of the die core, one end of the first die sleeve set is in threaded connection with the convex ring, a first material flow channel is formed between the inner molded surface of the first die sleeve set and a part of the outer molded surface of the die core, and the first material flow channel is communicated with the material flow hole; a mounting seat hole is formed in the other end of the first die sleeve set; and the second die sleeve set is coaxially and detachably mounted in the mounting seat hole, a second material flow channel is arranged between the inner molded surface of the second die sleeve set and the outer molded surface of the other part of the die core, and the second material flow channel is communicated with the first material flow channel. The cable core shift degree can be controlled, the cable quality stability is improved, the mold adaptability is improved, the cost is reduced, and the efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of cable forming, in particular to a combined extruding die without adjustment of eccentric core. Background technique [0002] Power cables are cables used for transmission and distribution of electric energy. The role of power cables involves all aspects of residential life and industrial production. The structure of the power cable is as figure 1 As shown, it includes an inner conductive core 1 and an outer sheath layer 2 with insulating properties. At present, the molding process of the power cable is mainly through the extrusion die, and the sheath material is coated on the inner conductive core 1 . [0003] Eccentricity is a key parameter of power cable forming quality. The calculation formula of eccentricity is: a=(D-d) / D (among them, a is the eccentricity, D is the maximum single-point thickness of the sheath layer, and d is the sheath layer thickness at the thinnest point). In the standard, the ...

AI Technical Summary

Problems solved by technology

The actual operation is to control the eccentricity through manual adjustment operation, which mainly depends on the adjustment experience of the workers. The eccentricity of the produced power cables will be greatly disturbed by human factors, and the quality is not stable enough; in addition, the power cables formed in this way For cables, workers need to re-adjust the eccentric screw before each start-up of the equipment or after a period of time after the start-up of the equipment. The forming of power cables requires frequent disassembly and assembly of the mold core and mold sleeve, which will not only cause a certain degree of wear to the mold, but also readjust the eccentric screw due to repeated positioning after disassembly and assembly, further increasing labor costs and reducing production efficiency

Images