1. What is casting
The liquid metal is poured into a mold cavity with a shape suitable for the part, and after it solidifies, a part product with a certain shape, size and surface quality is obtained, which is called casting. Three major elements: alloy, modeling, pouring and solidification. The biggest advantage: complex parts can be formed.
2. Development of casting
Production began in the 1930s using pneumatic machines and artificial clay sand processes.
Cement sand type appeared in 1933
In 1944, the cold hard coated resin sand shell type appeared
CO2 hardened water glass sand mold appeared in 1947
In 1955, the thermal coating resin sand shell type appeared
In 1958, the furan resin no-bake sand mold appeared
In 1967, the cement flow sand mold appeared
In 1968, water glass with organic hardener appeared
In the past 50 years, new methods of making casting molds by physical means, such as: magnetic pellet molding, vacuum sealing molding method, lost foam molding, etc. Various casting methods based on metal molds. Such as centrifugal casting, high pressure casting, low pressure casting, liquid extrusion, etc.
3. Features of casting
A. Wide adaptability and flexibility. All metal material products. Casting is not limited by the weight, size and shape of the part. The weight can be from a few grams to hundreds of tons, the wall thickness can be from 0.3mm to 1m, and the shape can be very complex parts.
B. Most of the raw and auxiliary materials used are widely sourced and cheap, such as scrap steel and sand.
C. Castings can improve the dimensional accuracy and surface quality of castings through advanced casting technology, so that parts can be cut less and without cutting.
Post time: Aug-11-2022
