The difference between various casting processes

Generalized gravity casting includes sand casting, metal casting, investment casting, mud casting, etc.; Narrow gravity casting refers to metal mold casting. Pressure casting refers to the process of liquid metal injection into the mold under the action of other external forces (excluding gravity).
Pressure casting in broad sense includes pressure casting and vacuum casting, low pressure casting, centrifugal casting, etc. The narrow meaning of pressure
Force casting refers to the metal mold pressure casting of die casting machine, referred to as die casting. These casting processes are the most commonly used in non-ferrous metal casting and the lowest relative price.
Sand casting is a traditional casting process which takes sand as the main molding material. Sand mold generally adopts gravity
Casting, there are special requirements can also use low pressure casting, centrifugal casting and other processes. The adaptability of sand casting is very wide and small
Pieces, large pieces, simple pieces, complex pieces, single, large quantities can be used.
Casting can be divided into gravity casting and pressure casting according to the pouring process of liquid metal. Gravity casting refers to molten metal in earth gravity
The process of casting under action, also known as casting.
However, sand casting also has some disadvantages:
because each sand casting can only be cast once, after the casting is obtained
That is, damage, must be re-shaped, so the production efficiency of sand casting is low; And because the overall nature of sand is soft and porous,Therefore, the size accuracy of sand casting is lower and the surface is rougher. However, after years of technical accumulation, is now big The surface condition of sand casting is greatly improved, and the effect of shot blasting is comparable to that of metal casting.Metal mold casting is a modern process of making hollow mold for casting with heat-resistant alloy steel. The metal type can use gravityCasting, or pressure casting. The metal mold can be used repeatedly, every time the metal liquid is poured, it is obtained A casting, long life, high production efficiency.
Metal mold casting is a modern process of making hollow mold for casting with heat-resistant alloy steel. The metal type can use gravity Casting, or pressure casting. The metal mold can be used repeatedly, every time the metal liquid is poured, it is obtained
A casting, long life, high production efficiency.The metal casting not only has good dimensional accuracy and smooth surface, but also has strong casting strength when pouring the same metal liquid Taller and less prone to damage than the sand type. Therefore, in the mass production of non-ferrous metal, small castings, as long as the casting The melting point of the material is not high, so metal casting is generally preferred.
However, metal mold casting also has some disadvantages:
Because heat resistant alloy steel and the processing of hollow cavity on it are more expensive, so the cost of metal mold is not
Finn: Pheebs, but overall it's much cheaper than the cost of a die cast. For small batches, spread over each item
The mold cost is obviously too high, generally not easy to accept. And because the metal mold by mold material size and cavity processing Equipment, casting equipment capacity is limited, so it is impossible to do for especially large castings.