Extruding machine self-centering mould

Abstract

The invention discloses an extruding machine self-centering mould. The extruding self-centering mould comprises an extruding machine head part, an overall mould seat, a constant-temperature water jacket, a self-centering mould core, a self-centering mould sleeve and a mould sleeve compressing cover. The self-centering mould sleeve flush with the front end of the overall mould seat is arranged below the left-front end of the overall mould seat, and the self-centering mould core closely attached to the inner surface of the overall mould seat is arranged in the position, on the right-front portion of the self-centering mould sleeve, of the overall mould seat; the mould sleeve compressing cover for compressing the overall mould seat and the self-centering mould sleeve is arranged at the left end of the overall mould seat; and the extruding machine head part is connected with the constant-temperature water jacket and attached to the outer surface of the overall mould seat through the constant-temperature water jacket. The eccentricity-adjusting process before production can be avoided, and it can be guaranteed that an extruded core line is not affected by external factors, and concentricity is kept all the time.

Description

technical field [0001] The invention relates to the technical field of cable molds, in particular to a self-centering mold for an extruder. Background technique [0002] For many years, in the production process of rubber sheath cable insulation and sheath extrusion, the extruder mold used by our factory has always been a matching structure in which the core and the mold sleeve can be adjusted separately, but we found that there are many problems in the production process , To this end, we improved the original mold, designed and produced a set of self-centering molds. [0003] The original mold structure is as figure 1 As shown, it is mainly composed of four parts: die sleeve base 1, die sleeve 2, mold core 3, and mold core base 4. This structure mainly has the following problems: [0004] (1) When using this kind of mold, the mold core and mold sleeve are installed on the machine head respectively, and its concentricity is difficult to measure. It must be measured and ...

AI Technical Summary

Problems solved by technology

If the cable core has strict requirements on the eccentricity of the extruded layer, especially for the extrusion of small-sized insulated cores below 20 mm2, it is difficult to adjust the eccentricity due to the small size of the conductor itself and the thin insulation layer. High, not only makes the power of self-centering die design of the extruder low at one start, but also causes large fluctuations in product quality

Therefore, when using this kind of mold, human factors have a great influence on the quality of extruded products

[0005] (2) Since the continuous sulfur production line is a closed production line in production, we cannot make secondary adjustments to the core wire extrusion after starting up

In this way, we have no way of knowing if the wire routing or equipment operation is unstable during production, which may easily cause the core wire to be eccentric, which will cause irreparable losses

[0006] (3) In the production of small-sized rubber sleeve lines, the fine-tuning time is longer in the process of adjusting the eccentricity, resulting in a large waste of raw materials, increasing production costs and reducing production efficiency

Secondly, because the existing domestic equipment cannot control the catenary degree of the core wire in the pipeline by itself, although the eccentricity is adjusted in place before the start-up, after the start-up, the core wire passes through a pipeline of more than 70 m, and when it is sealed after passing through, Whether it can meet the inspection standard will not be guaranteed, that is, the success rate of a startup is not high

[0007] (4) During production, since the mold sleeve is at the front end of the feed inlet, the rubber material stays in the feed inlet for a long time. Before the water vapor enters the pipeline, it first contacts the mold sleeve directly, and the mold sleeve quickly transfers heat to the rubber material. This can easily cause scorching and reduce the quality of extruded products

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