Moulding sand special for laser 3D printing and preparation process and application thereof

Abstract

The invention discloses moulding sand special for laser 3D printing and a preparation process and application thereof. The moulding sand comprises forming filling matter, forming curing agents, catalytic agents and addition agents, and the forming filling matter is foundry sand, and accounts for 92.5 percent to 97 percent of the total sand weight. The forming curing agents are furan resin and account for one percent to three percent of the total sand weight. The catalytic agents are p-toluenesulfonic acid, and account for 0.5 percent to one percent of the total sand weight. The addition agents are bentonite and borax, the bentonite accounts for 1.5 percent to three percent of the total sand weight, and the boric acid accounts for zero percent to 0.5 percent of the total sand weight. The moulding sand has the advantages that in the moulding sand forming process, the moulding sand can be formed without a mould, the size precision and strength are high, and a laser 3D printing method used in moulding sand is specially suitable for new product development, sample manufacturing and complex moulding sand manufacturing.

Description

technical field [0001] The invention belongs to the field of material casting, in particular to a special molding sand for laser 3D printing and its preparation process and application. Background technique [0002] With the acceleration of the replacement of metal products in life, the requirements for the development of related metal products are getting higher and higher, and the market competition is intensifying. It is also urgent to require developers and manufacturers to effectively control the cost and quality, which puts many problems It's all down to manufacturing technology and advanced craftsmanship. Many metal core components have very complicated structures, such as automobile engine cylinder heads and cylinder block castings. During the development of engines, the manufacture of molds for these parts is one of the links with the longest production cycle and the most cost. Generally, it is necessary to change the design and process many times, and each time th...

AI Technical Summary

Problems solved by technology

[0005]Although 3D printing rapid prototyping technology has effectively solved the pro The limitation of rapid prototyping materials, the part after forming cannot be consistent with the material of the actual final part

(2) The performance indicators of the existing rapid prototyping manufactured parts cannot meet the requirements of the final parts; (3) The existing rapid prototyping manufactured parts can only be used as visual models and assembly models, and cannot be used as functional prototypes for various Test and use inspection

(4) Even if 3D prints qualified metal product samples, it is only a single piece or a small batch, and cannot be mass-produced