Additive manufacturing method for copper/steel composite injection mould

Abstract

The invention discloses an additive manufacturing method for a copper/steel composite injection mould. The additive manufacturing method comprises the following steps of preparing a copper/steel composite plate incrementally formed part through an incremental forming method by taking a copper/steel composite plate as raw forming materials, and 3D-printing a copper base blank of the copper/steel composite injection mould by taking a copper layer of the copper/steel composite plate incrementally formed part as a baseplate; and finally 3D-printing a steel strengthened layer of the copper/steel composite injection mould by taking the copper base blank as a steel cladding. According to the additive manufacturing method, a high-strength copper/steel bonding interface of the copper/steel composite plate is transplanted into the copper/steel composite injection mould, and the problem that the copper base is hard to combine with the steel strengthened layer in the composite injection mould is solved; meanwhile, the contour of the copper/steel bonding interface in the copper/steel composite injection mould remains similar to the curved surface of a mould cavity, and the thickness of the steel strengthened layer is uniform; the whole manufacturing process is dieless forming, and the process is simple; and the high-quality and low-cost additive manufacturing of the copper/steel composite injection mould is achieved.

Description

technical field [0001] The invention relates to a mold manufacturing method, in particular to a method for additive manufacturing of a copper / steel composite injection mold. Background technique [0002] In the manufacturing time of a typical injection molded part, the cooling time of the part after plastic injection accounts for about 40%, which means that the cooling time has the greatest impact on the productivity of injection molded parts, and the cooling speed of injection molded parts has become an important performance of modern injection molds At present, the cooling rate is mainly improved by optimizing the mold structure and the cooling channels in the mold. However, due to the poor thermal conductivity of mold steel itself, it is difficult to achieve a high cooling rate for steel injection molds at present, and the increase in production efficiency is limited. At the same time, it is difficult for the existing steel mold to ensure uniform cooling of each part of ...

AI Technical Summary

Problems solved by technology

But no matter what 3D printing method is used, to print and manufacture copper / steel composite structure injection molds, it is necessary to solve the problem of high-strength bonding at the interface of copper and steel heterogeneous materials, so that copper and steel can be directly combined by welding during the printing process , the bonding strength of the copper / steel interface is difficult to meet the requirements

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