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

② Embedded casting. All kinds of non-plastic parts are put into the mold cavity, solidified with injected liquid materials and encapsulated in it.

③ Pressure casting. Applying a certain pressure to the material during casting is conducive to injecting viscous materials into the mold and shortening the filling time.

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, and the material is distributed on the inner wall of the mold cavity by gravity, and is heated and solidified to form. It is used to make hollow products, such as spheres and pipes.

(5) Centrifugal casting. A certain amount of liquid material is injected into a heatable mold rotating around a single axis at high speed. The material is distributed on the inner wall of the mold cavity under the action of centrifugal force and solidified into tubular or hollow cylindrical products through physical or chemical action. Monolithic cast nylon parts can also be formed by centrifugal casting.

Both polymer and material majors in universities are studying nylon products.