An electroplastic pipe extrusion molding device

Abstract

The invention discloses an extrusion forming device for an electro-plastic pipe. The extrusion forming device comprises a pulse power supply, a moving extrusion mold, an extrusion cushion, an extrusion cylinder, a static extrusion mold and a core shaft, wherein the static extrusion mold comprises a resistance module and a conductive module; the extrusion cushion and the core shaft are connected together; the moving extrusion mold drives the extrusion cushion, the core shaft and a blank to move in the extrusion cylinder; the static extrusion mold and the extrusion cylinder are detachably connected together; the core shaft is connected with a negative wire of the pulse power supply; the conductive module of the static extrusion mold is connected with a positive wire of the pulse power supply. The sizes of the resistance module and the core shaft are determined through the size of a machined pipe, and current supplied by the pulse power supply is determined according to the material of the blank. A machining device according to the invention is used for manufacturing the pipe through extrusion processing, pulse current is introduced to the static extrusion mold, and the resistance module is energized to generate heat so as to locally heat the blank; meanwhile, the blank is easy to form through extrusion by virtue of an electro-plastic effect, so that the working efficiency is improved, and the cost and the energy loss are reduced.

Description

technical field [0001] The invention relates to the field of extrusion molding in plastic processing, in particular to an electroplastic pipe extrusion molding device. Background technique [0002] Extrusion molding is an important forming technology in the field of plastic processing. It applies strong pressure to the metal billet placed in the die cavity (or extrusion cylinder) to force the metal billet to produce directional plastic deformation. A plastic processing method for parts or semi-finished products that are extruded in a die hole to obtain the desired cross-sectional shape, size and certain mechanical properties. Extrusion can produce tubes, rods, profiles, wires and various mechanical parts. The traditional extrusion technology is a plastic processing method that applies a certain external force to the metal billet placed in the mold to make it press out of the die hole or flow into a specific pore. According to the metal plastic flow direction and deformatio...

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Problems solved by technology

[0004] There are many related invention patents for hot extrusion forming. In the invention with the publication number CN2715873Y, a tool and die for seamless aluminum tube extrusion is provided. It is mainly aimed at aluminum tubes that are easier to be plastically formed, but this invention cannot Realize the processing of pipe thinning and thinning

And publication number is in the invention of CN101670385A, has used to apply pulse current to metal material to increase the formability of material, but its device is simple, is not suitable for processing pipe

In the invention with the publication number CN202516868U, in order to realize extrusion forming, a heater is installed in the middle of the extrusion cylinder to heat the metal. Since the heating object is a whole piece of raw material, there are problems of long heating time, large heat loss and low efficiency.

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