The theory of casting moulding liquid metal forming is often referred to as casting, and casting forming technology has a long history. As early as more than 5000 years ago, our ancestors were able to cast red copper and bronze products. Casting is the most widely used liquid metal forming process. It is the liquid metal poured into the casting cavity, to be cooled and solidified, to obtain a certain shape of the blank or parts of the method.
Liquid forming parts in machinery and equipment accounted for a large proportion of machine tools, internal combustion engines, mining machinery, heavy machinery, liquid forming parts accounted for 70% to 90% of the total weight; in the car, tractor accounted for 50% to 70%; in agricultural machinery accounted for 40% to 70%. Liquid forming process can be so widely used, because it can create a cavity, the shape of the blank is very complex. Such as a variety of boxes, machine tool beds, cylinder blocks, cylinder heads and so on. Process flexibility, wide adaptability. Liquid forming parts of the size is almost unlimited, its weight can be from a few grams to hundreds of tonnes, its wall thickness can be from 0.5mm to 1m or so, can also be made into casting impeller, astm a48 cl 30, casting wheel for trolley and so on. Industry where can dissolve into liquid metal materials can be used for liquid forming. For cast iron with poor plasticity, liquid forming is the only way to produce its blanks or parts. The cost of liquid moulded parts is low. Liquid forming can directly use the waste parts and chips, equipment costs are low. At the same time, liquid forming parts have small machining allowances, saving metal. In addition, it can have a variety of different strength, hardness, toughness with the comprehensive performance, but also with one or more special properties, such as wear resistance, high and low temperature resistance, corrosion resistance.