an extrusion die

Abstract

The invention provides an extruding die which is provided with a die cavity. The outer side of the portion of the large-material intersecting surface is provided with a plurality of working end faces which are arranged on the position corresponding to the die cavity, wherein the working end faces protrude out of the extruding die, and a hindering piece with a clearance is arranged on a working belt between the intersecting surface and the extruding die. Both the hindering piece and the extruding die are in an integrated structure. The hindering piece hinders the metal flow, can reduce the velocity of the metal flow on the position, and thus achieves the adjustment for the metal flow rate balance in the whole cavity, and enables the metal flow velocity of the intersecting surface to tend to be uniform. Due to the fact that both the hindering piece and the extrusion die are in the integrated structure, the hindering piece is always connected with the extruding die into a whole. The hindering piece is not easy to extrude out to drop into the die cavity under the actions of high temperature and high pressure, so that the surface scratch or damage to the die are reduced, and thereby reducing the number of repairing the die and meanwhile prolonging the service life of the die.

Description

technical field [0001] The invention relates to the technical field of profile extrusion, more specifically, to an extrusion die. Background technique [0002] The extrusion die is divided into a split die and a flat die. The split die usually includes an upper die and a lower die arranged at the top of the upper die, and the upper die cooperates with the lower die to form a die cavity. When using the hot extrusion process to manufacture extruded profiles, the ingot is first placed in the extrusion cylinder, and then the extrusion cylinder and the mold are heated together to a certain temperature to cause the ingot to undergo plastic deformation. At this time, the metal has a certain fluidity And the deformation resistance is small, you can use the push rod to push the metal in the extrusion cylinder into the mold cavity under a small pressure, so that it fills the entire cavity, and finally squeeze it, and you can get extrusion after cooling profiles. [0003] The working...

AI Technical Summary

Problems solved by technology

However, during the extrusion process, the welded metal sheets or surfacing weld scars are easily pressed off and enter the mold cavity under the action of high temperature and high pressure, causing scratches on the surface of the product or damage to the mold, resulting in an increase in the number of mold repairs. Reduce production efficiency, even lead to mold scrapping, reduce the service life of the mold

In addition, welding metal blocks on the lower die or surfacing welding on the working end face of the lower die will cause damage to the die and shorten the service life of the die

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