Metal Mold Casting Process

Also known as permanent mold casting, it is a casting method in which liquid metal is poured into a metal mold to obtain a casting. The mold is made of metal and can be used repeatedly (hundreds to thousands of times), also known as permanent casting. Generally, metal molds are made of cast iron and cast steel. The inner cavity of the casting can be either a metal core or a sand core. There are many types of metal types, such as horizontal type, heavy straight type, and composite type. The vertical parting is convenient for opening the gate and taking out the castings, the horizontal parting is mostly used to produce thin-walled wheel-shaped castings; the upper part of the composite parting is formed by the two parts of the vertical parting using hinges, and the lower part It is a fixed horizontal bottom plate, mainly used in the casting of more complex castings.

• It has good reusability and can be used for "one mold and multiple castings", saving modeling materials and man-hours.
• Due to the strong cooling ability of the metal mold to the casting, the structure of the casting is dense and the mechanical properties are high.
• The dimensional accuracy of the casting is high, the tolerance grade is IT12 ~ IT14; the surface roughness is low, and Ra is 6.3m.
• Metal mold casting does not use sand or less sand, which improves working conditions.

• Metal molds have high manufacturing costs, long cycles, and strict process requirements. They are not suitable for the production of single-piece small-lot castings.
• They are mainly suitable for large-scale production of non-ferrous alloy castings, such as aluminum pistons for aircraft, automobiles, internal combustion engines, motorcycles, Cylinder blocks, cylinder heads, oil pump casing and copper alloy bearing bush, bushing, etc.
• For black alloy castings, it is also limited to small and medium-sized castings with simpler shapes.