What is the difference between forming and casting

1, Process principle
Forming process mainly refers to the process of changing the shape and structure of raw materials (such as metals, plastics, rubber, etc.) through physical or chemical methods to obtain the required products or components. The forming process includes various types, such as stamping, forging, extrusion, injection molding, etc., each method has its specific process principles and application scope.
The casting process involves melting metal or other alloy materials, pouring them into a pre designed mold, and waiting for the material to cool and solidify to form the desired product or component. The casting process mainly includes sand casting, metal casting, pressure casting, etc. Its principle is to use the fluidity and solidification of metal materials to achieve shape replication.
2, Process
The process of forming technology usually includes the following steps: first, prepare the raw materials and cut, heat or soften them as needed; Then, use specific equipment or tools to process the raw materials, such as stamping, forging, etc; Finally, the formed product is subjected to subsequent treatments such as polishing and polishing to obtain the required surface quality and accuracy.
The process of casting technology includes steps such as melting metal, pouring, solidification, and demolding. Firstly, melt the metal material into a liquid state; Then, pour the liquid metal into the mold and wait for it to cool and solidify; Finally, open the mold, remove the casting, and perform necessary subsequent treatments such as removing burrs, polishing, etc.
3, Material suitability
The molding process is suitable for various materials, including metal, plastic, rubber, etc. Different forming methods are suitable for different material types and shape requirements. For example, stamping technology is suitable for the processing of metal sheets, while injection molding technology is commonly used for the manufacturing of plastic parts.
Casting technology is mainly applicable to metal materials, especially metals and alloys with lower melting points. Casting technology can produce castings with complex shapes and uneven wall thickness, and is therefore widely used in mechanical manufacturing, automotive manufacturing, aerospace and other fields.
4, Finished product characteristics
The finished products obtained by the molding process usually have high dimensional accuracy and surface quality, which can meet high quality requirements. In addition, the forming process can produce parts of various shapes and structures, with great flexibility.
The castings obtained by the casting process may have certain errors and deviations in shape and size, as the flow and solidification process of liquid metal in the mold are influenced by various factors. However, the casting process can produce large and complex parts with relatively low costs, thus having irreplaceable advantages in certain fields.