Q. What is Plastic Injection Molding?
A. Injection molding is the most widely used polymeric fabrication process. It evolved from metal die casting, however, unlike molten metal, polymer melts have a high viscosity and can not simply be poured into a mold.
Instead a large force must be used to inject the polymer into the hollow mold cavity. More melt must also be packed into the mold during solidifi-cation to avoid shrinkage in the mold. Identical parts are produced through a cyclic process involving the melting of a pellet or powder resin followed by the injection of the polymer melt into the hollow mold cavity under high pressure.
Q. What kind of products can be produced?
A. Injection molding can be used to form a wide variety of products.
Complexity is virtually unlimited, sizes may range from very small to very large, and excellent control of tolerances is also possible.
Q. What are the materials used?
A. Nearly all polymers may be injection molded, including thermoplastics, fiber reinforces thermoplastics, thermosetting plastics, and elastomers.