Rapid manufacturing method for metal 3D printing injection mold of structure facing gradient space

Abstract

The invention provides a rapid manufacturing method for a metal 3D printing injection mold of a structure facing a gradient space. The rapid manufacturing method comprises the steps that the injection mold is designed according to the characteristics of an injection molded part at first, meanwhile, the injection mold is partitioned according to the service characteristics and the molding characteristics of the injection mold in the injection molding process, decoupling optimization is conducted, and the injection mold is divided into a molding area, a supporting area and a function area; then the molding area of the injection mold is manufactured through a metal 3D printing mode; the supporting area of the injection mold is manufactured through a machining mode; the function area of the injection mold is manufactured through a metal 3D printing mode and is a molding insert or a cooling insert with a conformal cooling water channel; and the molding area, the supporting area and the function area are fastened and connected in a bolted connection or inserted connection mode finally. According to the rapid manufacturing method for the metal 3D printing injection mold of the structure facing the gradient space, the manufacturing efficiency of the injection mold is improved, the service life of the injection mold is prolonged, meanwhile, the cooling rate of the injection mold is increased so that the injection molding efficiency can be significantly improved, and the problem that the inconsistency is required by the material performance in the service process is solved.

Description

technical field [0001] The invention relates to the technical field of metal 3D printing, in particular to a rapid manufacturing method for metal 3D printing injection molds facing gradient space structures. Background technique [0002] Metal 3D printing technology (SLM) is a layered additive manufacturing technology that uses metal powder as raw material. Metal 3D printing printing technology is applied in the field of injection mold manufacturing, which can get rid of the drilling process and inlay structure in the traditional cooling channel realization method, so that the injection mold has complex conformal cooling channels, and the temperature uniformity of the injection mold cavity distribution, reduce the warpage of injection molded parts, ensure the quality and precision of injection molded parts, and realize the rapid manufacture of injection molds and the molding quality of injection molded parts. [0003] However, the existing metal 3D printing technology-based...

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Problems solved by technology

[0003] However, the existing methods of manufacturing injection molds based on metal 3D printing technology have the following problems: 1. The manufacturing efficiency of existing metal 3D printing molds is generally low, precision and efficiency cannot be taken into account at the same time, and the weight of the molding machine printed per hour Small, difficult to meet high-efficiency industrial needs; 2. The existing metal 3D printing molds print the injection mold as a whole, that is, the cooling water channel and the mold convex and concave molds are printed as a whole, resulting in high manufacturing costs and low efficiency; 3. 1. The material properties of existing metal 3D printing molds are evenly distributed in the mold structure, while the molding surface and non-molding surface parts have inconsistent material performance requirements during the injection molding process

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