A kind of additive manufacturing method of copper/steel composite injection mold

Abstract

The invention discloses an additive manufacturing method for a copper / steel composite injection mold, which comprises the following steps: using a copper / steel composite plate as the original forming material, first adopting a progressive forming method to prepare a copper / steel composite plate progressively formed part, and then using The copper layer of the incrementally formed copper / steel composite plate is the substrate 3D printing the copper matrix blank of the copper / steel composite injection mold, and finally the steel cladding of the copper substrate blank is used as the substrate to 3D print the steel reinforcement of the copper / steel composite injection mold Floor. The invention transplants the high-strength copper / steel bonding interface of the copper / steel composite plate into the copper / steel composite injection mold, which solves the difficult problem of high-strength bonding between the copper matrix and the steel reinforcement layer in the copper / steel composite injection mold. At the same time, In the copper / steel composite injection mold, the profile of the copper / steel bonding interface remains similar to the surface of the mold cavity, and the thickness of the steel reinforcement layer is uniform; the entire manufacturing process is moldless forming processing, and the process is simple. Cost Additive Manufacturing.

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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