Casting process.

Casting process.

May 16, 2020

Casting generally does not apply pressure, the requirements for the strength of the equipment and mold are not high, the size of the product is limited, and the internal stress in the product is also low. Therefore, the production investment is small, and large-scale parts with excellent performance can be produced, but the production cycle is long, and mechanical processing is required after molding. On the basis of traditional casting, methods such as pouring, insert casting, pressure casting, rotary casting and centrifugal casting are derived.

①Perfusion. The difference between this method and casting is that the product is released from the mold after casting; and the mold is a part of the product itself when pouring.

②Inlay casting. Various non-plastic parts are placed in the mold cavity and solidified with the injected liquid material so that it is enclosed in it.

③ Pressure casting. Applying a certain pressure to the materials during casting is beneficial to inject viscous materials into the mold and shorten the filling time. It is mainly used for epoxy resin casting.

④Rotary casting. After the material is injected into the mold, the mold rotates around a single axis or multiple axes at a relatively low speed. The material is distributed on the inner wall of the mold cavity by gravity and is shaped by heating and curing. Used to manufacture spherical, tubular and other hollow products.

⑤ Centrifugal casting. Inject quantitative liquid materials into a mold that rotates around a single axis at high speed and can be heated, use centrifugal force to distribute the materials on the inner wall of the mold cavity, and solidify into a tubular or hollow cylindrical product by physical or chemical action casting]). Monomer casting nylon products can also be formed by centrifugal casting.