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Casting is one of the oldest procedures done on metal. Many products are formed using this method. Here is an attempt to share the knowledge of casting.

Casting is one of four types: sand casting, permanent casting, plaster casting and die casting China companies . All these types of castings have their own advantages and disadvantages. Depending on the properties of the product required, one of the castings is selected.

Sand Casting: photo0.jpg This method of casting is used since 1950. The texture of the product depends on the sand used for casting. The end product gives a smooth finish at the end. Usually, iron, steel, bronze, brass, aluminum, magnesium alloys which often include lead, tin, and zinc.

Permanent Mold Casting: Permanent Mold Casting uses two pieces of mold. This mold is joined together and molten metal is poured into this mold. The hot metal is allowed to cool and mold pieces are separated. Some products have metal extrusion which is removed by flash grind or by hand. Tin, Lead, and Zinc are commonly molded using this method.

Plaster casting: Plaster casting is one of the easiest methods. However, it is used for metals with low melting points like Copper, Zinc, and Aluminum. This is the easiest process because mold can be made easily in the case of brakes in the procedures.

Die casting: Die casting is done by introducing molten metal into the mold at high or low pressure. Earlier only low-pressure die casting was used, but nowadays high pressure die casting is used more extensively. Molds are well designed to give complex products with stunning accuracy and smooth finishing. They are made of high-quality steel and have a higher melting point. These molds can be reused thousands of times. Casts can be a single cavity that produces only a single component, multiple cavities that produce multiple identical parts at a time, unit dies that produces different parts and a combination die that produces different parts in one go. Usually, zinc, copper, aluminum, lead, pewter, and tin-based alloys are used for die casting.

Using die casting we can make products with pore-free products that do not allow gas to pass through them and make them strong. Two types of machines are used for die casting.

Hot-chamber die casting is used for high-fluidity metals. First, the molten metal is collected using gooseneck and then the metal is shot into the mold. The advantage of this method is increased cycles / min. But the disadvantage is that high-melting point metals and aluminum pick-sup iron particles.

Cold chamber die casting is used where hot-chamber cannot be used. In this process the molten metal is transferred to the injector and then the injector injects the metal into the mold. Metals with high melting points can be die-cast using this process, but the disadvantage is slower than the hot-chamber process.

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