Plastic products are made from the mixture of synthetic resin and various additives by injection, extrusion, pressing, pouring and other methods. Plastic products can obtain the final performance while forming, so plastic forming is the key process of production.

Plastic molding, also known as injection molding, is a method that uses an injection machine to quickly inject molten plastic into a mold and solidify it to obtain various plastic products. This method can be used for almost all thermoplastics and also for the forming of some thermosets.

Injection molding accounts for about 30% of the production of plastic parts. It has the advantages of forming complex parts in one time, accurate size and high productivity; However, the equipment and mold costs are relatively high, mainly for the production of large quantities of plastic parts.