Casting process

2022-12-14

Generally, no pressure is applied to the casting process, the strength of the equipment and mold is not required, the size of the product is less limited, and the internal stress in the product is also low. Therefore, the production investment is small, and large parts with excellent performance can be made, but the production cycle is long, and machining must be carried out after forming. On the basis of traditional casting, pouring, inlay casting, pressure casting, rotary casting and centrifugal casting are derived.

① Infusion. The difference between this method and casting lies in that: after casting, the product will come out of the mold; The mold is an integral part of the product itself when pouring.

② Cast in. Put various non plastic parts in the mold cavity, solidify them with the injected liquid materials, and encapsulate them in the mold cavity.

③ Pressure casting. During casting, a certain pressure is exerted on the materials, which is conducive to injecting viscous materials into the mold and shortening the filling time. It is mainly used for epoxy resin casting.

④ Rotary casting. After the material is injected into the mold, the mold rotates around a single axis or multiple axes at a low speed. The material is distributed on the inner wall of the mold cavity by gravity, and is shaped by heating and curing. It is used to manufacture hollow products such as spheres and tubes.

⑤ Centrifugally cast. Inject a certain amount of liquid materials into a mold that rotates at a high speed around a single axis and can be heated, distribute the materials on the inner wall of the mold cavity by centrifugal force, and solidify them into tubular or hollow cylindrical products by physical or chemical action (see Figure [Centrifugal Casting]). Monomer cast nylon parts can also be formed by centrifugal casting.

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Simple overview of casting

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