Hot-extrusion die for molding multi-core cavity aluminum alloy profile and flow supply method

Abstract

The invention relates to a hot-extrusion die for molding a multi-core cavity aluminum alloy profile and a flow supply method. The die comprises an upper die and a lower die, wherein the upper die is formed by combining an upper-layer die and a lower-layer die; the upper-layer die is provided with an inner die core and a plurality of first diversion holes; the bottom end of the lower-layer die is provided with an outer die core with an inner die hole, while a top end is provided with a third diversion hole coaxial with the inner die hole and a plurality of second diversion holes running through the upper and lower end faces of the lower-layer die; and an outer die hole flow supply channel is reserved from the first diversion holes to the outer die hole on the lower die through the second diversion holes, while an inner die hole flow supply channel is reserved from the first diversion holes to the inner die hole through the third diversion hole. The die has the characteristics of long service life, easy machining and repair, and stable profile molding in production.

Description

technical field [0001] The invention relates to an extrusion die for an aluminum alloy profile, in particular to a hot extrusion die for forming a multi-core cavity aluminum alloy profile with a complex cross-sectional structure and a metal flow supply method. Background technique [0002] At present, the mold used to extrude multi-core cavity aluminum alloy profiles adopts the method of perforating the flow supply. The upper mold and the lower mold of the mold are of integral structure, and a number of perforations are opened on the side wall of the inner mold hole, and the external metal passes through the mold. The perforation is introduced into the inner mold hole to realize the flow supply of the inner mold hole. This flow supply structure has the following defects: 1. Due to the realization of the flow supply function of the inner mold hole, the perforation of the side wall of the inner mold hole needs to be made very large, which seriously affects the structural stren...

AI Technical Summary

Problems solved by technology

This flow supply structure has the following defects: 1. To realize the flow supply function of the inner mold hole, the perforation of the side wall of the inner mold hole needs to be made very large, which seriously affects the structural strength of the outer mold core and the mold life is short

2. Profile molding is unstable

3. The integral upper mold is adopted, the mold processing is difficult, and it is impossible to produce multi-core cavity aluminum alloy profiles with complex cross-sectional structures

4. The perforation structure of the upper mold with this integral structure is mainly processed by electric discharge technology, the machining accuracy cannot be guaranteed, the error is large, and the mold repair is difficult

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