Pipe extruder die

Abstract

The invention provides a pipe extruder die which comprises a mouth die body, a core die body, a first supporting rod, a second supporting rod and a core die body cooling pipe. The core die body is arranged in the mouth die body, and the core die body and the mouth die body are arranged coaxially. A first flow guide channel, a second flow guide channel and a shaping channel which are sequentially connected in the material extruding direction are formed between the mouth die body and the core die body. The second flow guide channel is of a frustum shape, and the diameter of the end, close to the first flow guide channel, of the second flow guide channel is larger than that of the other end of the second flow guide channel. A spiral mouth die body cooling channel is formed in the mouth die body. The mouth die body cooling channel is arranged around the shaping channel. The core die body is of a hollow structure, and both the first supporting rod and the second supporting rod penetrate through the mouth die body and extend into a cavity of the core die body. Flow channels are formed in the first supporting rod and the second supporting rod. The core die body cooling pipe is arranged in the cavity of the core die body. An inlet of the core die body cooling pipe is communicated with the flow channel of the first supporting rod, and an outlet of the core die body cooling pipe is communicated with the flow channel of the second supporting rod. The pipe extruder die is high in extrusion efficiency and cooling speed and good in pre-shaping effect.

Description

technical field [0001] The invention relates to the technical field of extrusion dies, in particular to a pipe extruder die. Background technique [0002] The cable protection tube is usually extruded by an extruder. The preliminarily formed tube blank is extruded from the die, enters the cooling and shaping device for cooling and sizing, and then enters the cooling water tank for further cooling, and finally is led to the cutting device by the traction device , cut to the required length. [0003] In the extrusion molding process, the tube blank is formed through the extrusion die, and the tube blank is extruded and then enters the calibrating box for shaping and cooling. However, due to the high temperature of the extrusion mold, the tube blank will enter the shaping process after being extruded from the mold. The box was deformed under the action of gravity before, which is not conducive to the shaping process of entering the shaping box. [0004] In the prior art, cool...

AI Technical Summary

Problems solved by technology

[0003] In the extrusion molding process, the tube blank is formed through the extrusion die, and the tube blank is extruded and then enters the calibrating box for shaping and cooling. However, due to the high temperature of the extrusion mold, the tube blank will enter the shaping process after being extruded from the mold. The box is deformed under the action of gravity before, which is not conducive to the shaping process of entering the shaping box

[0004] In the prior art, cooling pipes are installed in the die for presetting. Due to structural limitations, the cooling speed is slow and the efficiency is low, resulting in poor presetting effect.

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