Be from metal working
Liquid metal is poured into a casting cavity suitable for the shape and size of the part, and then cooled and solidified to obtain the blank or part, usually called liquid metal forming or casting.
Process flow: liquid metal → mold filling → solidification shrinkage → casting
Casting classification
(1) Sand Casting
Sand casting: Casting method for producing castings in sand. Steel, iron and most non-ferrous alloy castings can be obtained by sand casting.
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(2) investment casting
Investment casting: usually refers to the fusible material in the shape, in the shape of the surface coated with a number of layers of refractory material into the shell, and then the shape of the melting out of the shell, so as to obtain the casting without parting surface, after high temperature roasting can be filled with sand casting casting scheme. It is often called “lost wax casting”.
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(3) Die casting
Die casting: the liquid metal is pressed into a precision metal mold cavity at high speed by high pressure, and the liquid metal is cooled and solidified under pressure to form castings.
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(4) Low pressure casting
Low pressure casting: it is a method of filling the mold with liquid metal under low pressure (0.02 ~ 0.06mpa), and crystallizing under pressure to form the casting.
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(5) Centrifugal casting
Centrifugal casting: it is a casting method in which molten metal is poured into a rotating mold and the mold is filled and solidified under the action of centrifugal force.
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(6) Gravity die casting
Metal mold casting: refers to the liquid metal under the action of gravity filling metal mold and cooling solidification in the mold to obtain a casting method.
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(7) Vacuumdie casting
Vacuum casting: Advanced die casting process that eliminates or significantly reduces air holes and dissolved gases in die castings by removing gases in die casting cavities during die casting, thereby improving mechanical properties and surface quality of die castings.
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（8）squeezing die casting
Squeeze casting: liquid or semi-solid metal solidification under high pressure, flow forming, direct production or blank method. It is a kind of energy saving metal forming technology with potential application prospect because of its advantages of high utilization rate of liquid metal, simplified process and stable quality.
Process flow:
Direct extrusion casting: spraying paint, casting alloy, clamping, pressure, pressure, pressure relief, parting, blank demoulding, reset;
Indirect extrusion casting: spray coating, mold, feed, mold filling, pressure, pressure, pressure relief, parting, blank demoulding, reset.
(9) Lost foam Casting
Epc (also called real mold casting) : will and casting size shape is similar to that of paraffin wax or foam model binding into clusters, brush after refractory coating and drying, buried in the dry quartz sand vibration model, under the negative pressure casting, make the model of gasification, liquid metal model position, after cooling solidification form a new type of foundry casting method.
Process flow: pre-foaming → foaming molding → dipping coating → drying → molding → pouring → falling sand → cleaning
(10) Continual casting
Continuous casting: an advanced casting method in which molten metal is poured continuously into a special metal mold called a mold. The solidified (crusted) casting is continuously pulled from the other end of the mold to obtain a casting of any length or a specified length.
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