Supporting cooling type extruding die

Abstract

The invention provides a supporting cooling type extruding die. The supporting cooling type extruding die comprises an external die, a mandrel, a cooling structure and a supporting structure; the mandrel is fixed at a central part of an inner cavity of the external die and an annular flow channel of a melted material is formed by the mandrel and the external die; an external end of the mandrel is connected with the supporting structure; a supporting contact part is arranged at a free end of the supporting structure; the supporting contact part is annular and is in contact with a wall surface of the inner cavity of an extruded plastic pipe, and is used for supporting the plastic pipe; an external die cavity wall cooling channel is arranged in a solid part of the external die; one end of the external die cavity wall cooling channel is communicated with an external cooling pipe of the external die and the other end of the external die cavity wall cooling channel is communicated with an annular cooling pipe of the external die; the annular cooling pipe of the external die is arranged in a cavity wall of an external end part of the external die; the annular cooling pipe of the external die is communicated with an outer-pipe cooling part; the outer-pipe cooling part is wound around the extruded plastic pipe. The supporting cooling type extruding die provided by the invention can be used for supporting the extruded plastic pipe and prevents defects that a wall thickness of the plastic pipe is not uniform and a shape is deformed, and can be cooled from the external part after the pipe is molded; errors of a subsequent process are reduced.

Description

technical field [0001] The invention belongs to the technical field of plastic pipe extruders, and in particular relates to a die head with supporting and cooling functions. Background technique [0002] The plastic extrusion mold is a mold used for plastic pipe forming. It is installed at the output end of the extruder. When producing plastic pipes, it is necessary to use a die formed by a combination of a die and a core die for extrusion. The die controls the external shape of the plastic pipe. , the mandrel controls the internal shape of the pipe. When the plastic is extruded, because the plastic pipe is not cooled immediately, and due to gravity, the plastic pipe is easily deformed in the radial direction when it is extruded, and even the wall thickness is uneven. The structural performance of the whole pipe is poor. Contents of the invention [0003] In view of this, the present invention aims to propose a plastic extrusion die with a supporting structure and a cooli...

AI Technical Summary

Problems solved by technology

[0002] The plastic extrusion mold is a mold used for plastic pipe forming. It is installed at the output end of the extruder. When producing plastic pipes, it is necessary to use a die formed by a combination of a die and a core die for extrusion. The die controls the external shape of the plastic pipe. , the mandrel controls the internal shape of the pipe. When the plastic is extruded, because the plastic pipe is not cooled immediately, and due to gravity, the plastic pipe is easily deformed in the radial direction when it is extruded, and even the wall thickness is uneven. Lead to poor structural performance of the whole tube

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