Method for forming mould-free gel with metal sizing agents through 3D printing

Abstract

The invention provides a method for forming mould-free gel with metal sizing agents through 3D printing. A 3D printing technology is combined with a gel forming technology, the metal sizing agents are prepared through a gel forming process, the sizing agents are adopted as the raw materials of 3D printing, then layered printing is carried out through 3D printing equipment according to a data model, the metal sizing agents are solidified fast by controlling the additive number of initiating agents and catalysts, the initiating agents and the catalysts are accumulated layer by layer to form a metal blank, and the metal blank is dried and sintered to obtain a metal part product with a large size and in a complex shape. The method can be used for manufacturing a part including a sealed cavity and a complex inner cavity, the part cannot be manufactured through a traditional gel casting forming mode, the blank is directly formed through the 3D printing technology, mould development cost is saved, the method has obvious advantages in single part production and small scale production, requirements for powder materials are low, the process is stable and reliable, the operability is strong, consumed time is short, efficiency is high, cost is low, and the industrialization of manufacturing the metal part with the large size and in the complex shape through the 3D printing technology is facilitated.

Description

technical field [0001] The invention relates to a metal powder forming technology, which belongs to the technical field of metal parts preparation, and in particular provides a method for preparing large-sized and complex-shaped metal parts by 3D printing of metal slurry without mold gel forming. Background technique [0002] 3D printing, a type of rapid prototyping, is a technology based on a three-dimensional data model, using powder-like bondable materials, and constructing objects by layer-by-layer printing. 3D printing is usually realized by using digital technology material printers. It is often used to manufacture models in mold manufacturing, industrial design and other fields, and is now gradually used for direct manufacturing of products. The basic process is: divide the 3D model into several layers in the computer, use the 3D printing equipment to layer graphics according to the data model on a plane, sinter or bond materials such as plastics and metals together, ...

AI Technical Summary

Problems solved by technology

However, the gel injection molding technology first needs to prepare a mold. The cost of single-piece and small-batch production is high, and some parts with complex shapes cannot be prepared into molds, such as clos...