Intermediate color separable special-shaped cable extrusion molding outer die sleeve

Abstract

The invention discloses an intermediate color separable special-shaped cable extrusion molding outer die sleeve, which comprises a die sleeve main body, a discharging unit, an intermediate color circular channel groove and drainage grooves. The die sleeve main body is internally provided with an outer die cavity. The discharging unit comprises a discharging main body, a plurality of die sleeve corridors are arranged on the discharging main body, a connecting channel is arranged between every two adjacent die sleeve corridors, and a protruding part protruding inwards is arranged on one side of each connecting channel. The intermediate color circular channel groove is annularly formed in the outer surface of the die sleeve main body. The drainage grooves are provided with drainage groove inlets and drainage groove outlets, the drainage groove inlets are located in the inner wall of the intermediate color circular channel groove, the drainage groove outlets are located in the inner walls of the die sleeve corridors, and the intermediate color circular channel groove, the drainage grooves and the die sleeve corridor communicate with one another. The die sleeve corridors are provided with feeding ports, and the drainage groove outlets are far away from the feeding ports. The outer surface of the die sleeve main body is provided with the intermediate color circular channel groove, and the drainage grooves communicate with the intermediate color circular channel groove and the die sleeve corridors, so that the die sleeve can rotate by 360 degrees when the eccentricity is adjusted, interval color sizing material is always positioned in the intermediate color circular channel groove, and the production efficiency of dies is ensured.

Description

technical field [0001] The present application relates to the technical field of cable manufacturing equipment, in particular to an outer die sleeve for secondary color separable special-shaped cable extrusion. Background technique [0002] It is necessary to design a two-core (8-shaped) or multi-core detachable cable, and one of the cores is required to have a second-color color strip line. In order to realize the production of intermediate colors, the original mold design is to open a drainage groove at the position directly above the mold sleeve (that is, corresponding to the intermediate color extruder above the machine head), and drain the intermediate color rubber material to the main color rubber through the drainage groove. In the material, it is extruded through the mold cover gallery together with the main color rubber material to form a secondary color color strip. [0003] However, there are two disadvantages in this solution: (1) When the extrusion mold of the ...

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Problems solved by technology

[0003] However, there are two disadvantages in this solution: (1) When the extrusion mold of the special-shaped (non-circular) cable is adjusted to be eccentric, not only the adjustment mold sleeve needs to be adjusted up, down, left, and right, but sometimes the mold sleeve needs to be adjusted by rotating the mold sleeve. There is only one slot on the original mold sleeve. Once it is rotated, the injection position of the intermediate color extruder will deviate from the slot, and the intermediate color rubber cannot be extruded normally; (2) The drainage groove of the original mold sleeve is directly from the top Then, it is imported into the inner side of the mold cover gallery, and at the exit, the intermediate color rubber material is mixed with the main color rubber material first, and then extruded through the mold cover gallery. Due to the influence of material pressure, the width, proportion and position of the intermediate color stripes cannot be adjusted accurately, and this method is more wasteful of intermediate color rubber. Sometimes the intermediate color disappears or is too deep due to the mismatch of extrusion pressure control.

However, there are three disadvantages in this solution: (1) If the joint is narrow, the connection is unstable, and the production process is prone to poor appearance. If the joint is wide, it is not easy to tear; (2) Before tearing, it needs After the blade cuts the opening above 10cm, tear it by hand, which is cumbersome, laborious and dangerous; (3) There is a risk of burrs, irregularities, or even damage to the cable core when tearing

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