Injection molding is a versatile process for creating high-quality components and parts from plastic resins. In injection molding, the plastic material is heated to liquid form and injected under pressure into a mold. Once there, it is carried through channels — called runners — to mold cavities machined in the shape of the finished part or product. After cooling and solidifying, the two halves of the mold are separated and the finished parts are ejected from the cavities. The next step of the process is typically a quality check. Mold design and product design are critical aspects of injection molding. As such, good injection molding design is necessary to ensure that the process runs smoothly.