Casting die based on 3D printing and preparation method thereof

Abstract

The invention provides a casting die based on 3D printing. The casting die based on 3D printing comprises a component I and a component II obtained through 3D printing. A cavity of the component I and a cavity of the component II are each filled with a resin fiber layer, a fiber layer and a foaming layer from outside to inside in sequence. A preparation method of the casting die comprises the steps of (1) modeling: segmenting a model into a plurality of components connected through dovetail grooves; (2) using a 3D printer to conduct printing to obtain a plurality of components of a hollow structure; (3) machining a filling port in the plane of each component; (4) filling up a cavity of each component with a mixture of slow dry resin and reinforce fiber; (5) adding glass fiber into the cavity of each component; (6) injecting a foam material into the cavity of each component; (7) connecting the components through the dovetail grooves; and (8) filling up gaps of the dovetail grooves with A / B glue, conducting coating of epoxy resin and then conducting grinding and polishing. The casting die based on 3D printing and the preparation method thereof have the advantages that the precision is high, the preparation cycle is short, the weight is low, the die strength is high, and the production cost is low.

Description

technical field [0001] The invention belongs to the technical field of moulds, and relates to a casting mold, in particular to a 3D printing-based casting mold and a preparation method of the mold. Background technique [0002] Casting mold means that in order to obtain the structural shape of the part, other easy-to-form materials are used to make the structural shape of the part in advance, and then the mold is placed in the sand mold, so a cavity with the same structural size as the part is formed in the sand mold. Then, a fluid liquid is poured into the cavity, and after the liquid cools and solidifies, a part with exactly the same shape and structure as the mold can be formed. Casting molds often use metal models or wooden models, and their characteristics are as follows: [0003] 1. Metal models are usually processed by mechanical automation, with high processing precision and short processing cycle, but there are disadvantages such as heavy model weight, difficult ha...

AI Technical Summary

Problems solved by technology

[0003]1. Metal models are usually processed by mechanical automation, with high processing precision and short processing cycle, but there are disadvantages such as heavy model weight, difficult handling and high production cost;

[0004]2. Wooden models are usually made by hand, by cutting paper samples, measuring the size, making one step, measuring one step, the efficiency is very low, as long as a certain step If there is an error in the production, the entire wooden model will be scrapped and it will be necessary to start all over again; if the model has complex curved surfaces, the technical and experience requirements of the wooden model master are very high, and it is difficult to make the curved surface of the wooden model and the curved surface required by the mold. It is completely consistent, and the quality of the product cannot be guaranteed. Therefore, the wooden model for casting has disadvantages such as poor precision, low processing efficiency, high requirements for workers and long cycle time.

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