Self-expanding mold for reverse extruder and assembly method thereof

Abstract

The invention discloses a self-expanding mold for a reverse extruder. The reverse extruder comprises an extrusion cylinder and a die shaft, the self-expanding mold comprises an expanding ring which isapproximately cylindrical, has elasticity and comprises a first connecting part which is located at a first end of the expanding ring and used for being connected to a mold shaft, a sealing part which is located at an opposite second end of the expanding ring and has the outer diameter being slightly larger than that of the first connecting part, and a deformation part located between the first connecting part and the sealing part, a supporting ring which is arranged on an inner side of the expansion ring in a manner of being coaxial with the expansion ring, has a step shape matched with theshape of an inner surface of the expansion ring, and comprises a second connecting part, a conical end part used for being in close contact with a conical flaring of the expansion ring sealing part, and a middle step part, and a mold mounted on an inner side of the conical end part of the supporting ring. The invention further provides an assembling method of the self-expanding mold for the reverse extruder. The die can effectively prevent residual metal from being generated on the inner wall of the extrusion cylinder during metal extrusion.

Description

technical field [0001] The invention relates to the technical field of extrusion dies, in particular to a self-expanding die for a reverse extruder and an assembly method for the self-expanding die for a reverse extruder. Background technique [0002] Reverse metal extrusion machine has a wide range of applications in the field of extrusion of high-end rods, profiles, and pipes due to its low frictional resistance, uniform metal flow, stable product quality, and high yield. [0003] figure 1 It schematically shows the working process of a typical reverse extruder in the prior art, and the four figures from top to bottom sequentially show four working steps of the reverse extruder. like figure 1 As shown, the reverse extrusion machine may include an extrusion cylinder 1, an elastic mold 2, a mold shaft 3 connected with the mold 2, a blank 4 to be extruded, a plug 5, and a profile 6. figure 2 Schematically shows figure 1 Front and side views of Die 2 in . like Figure 1...

AI Technical Summary

Problems solved by technology

In order to solve the problem of residual aluminum, each cycle of the reverse movable mold technology needs to be cleaned, which not only needs to add multiple mechanisms for transporting, cleaning, and lubricating the mold, but also needs to be configured if multiple mold cycles are used. Because of mold heating, heat preservation and other devices, the structure of the extruder becomes very complicated and there are relatively many failure points

At the same time, the mold needs to leave the extrusion center every cycle, resulting in interruption of extrusion and low production efficiency

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