Mould for continuous extrusion production of high-width-thickness-ratio profiles

Abstract

The invention relates to a mould for the continuous extrusion production of profiles, which can be used for producing large-sized (high-width-thickness-ratio) profiles by using a small-capacity continuous extruder, and belongs to the technical field of metal continuous extrusion. In the invention, an inlet of an opening of the mould is provided with a diversion trench which is completely same as an outlet of an expansion module cavity in shape and size; a 'dumbbell-shaped' diversion trench is arranged behind the diversion trench; a choking surface with a choked angle of 8-15 DEG and a promoted angle of 50-90 DEG is arranged behind the 'dumbbell-shaped' diversion trench through design, and the height of the choking surface is 5-15 mm. A mould design method in the invention is used for the continuous extrusion production of profile products in general specifications, can reduce extrusion forces, increase the productivity, lower the mould loss, and improve the service life of the mould.

Description

technical field [0001] The invention relates to a mold design capable of using a small-capacity continuous extrusion machine to produce profiles with large specifications and large width-to-thickness ratios and provides corresponding mold equipment, belonging to the technical field of continuous extrusion of non-ferrous metals. Background technique [0002] Copper is a non-ferrous metal with high electrical conductivity and high heat dissipation rate, so it is widely used in various power industries. Copper and copper alloy conductive bars, conductive busbars, and conductive flat wires are used for power transmission and transformation. Necessary materials for conduction. With the continuous development of the electronics industry, the conductivity requirements for copper conductive products are more stringent, and the product size requirements are more precise. For conductive products such as copper bars, the national standard requires their resistivity to be ≤0.017772Ωmm ...

AI Technical Summary

Problems solved by technology

When producing some wide products, the metal flow is adjusted by increasing the flow resistance angle or the flow resistance of the flow resistance surface, but the effect of this method is not obvious, resulting in uneven metal flow inside the mold and product cracking and twisting , bending and other defects seriously affect the yield

And limited by the principle of continuous extrusion, equipment capacity and existing mold design, this technology cannot produce some copper profile products with larger sizes and larger width-to-thickness ratios

For some products that exceed the capacity of the existing equipment and the market demand is not large, the research and development and purchase of larger continuous extrusion will cause waste, so we can only find a way from the mold design

In addition, because the forming of the product is completed under high temperature and high pressure during the extrusion process, it is easy to cause wear of the mold, which seriously affects the life of the mold for this type of product, and indirectly increases the production cost.

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