Core Half of the mold which allows the part to be hollow. Often referred to as the male side of the mold. Cavity Half of the mold which is opposite the core and forms the outside of the part. Cold Slug Well Section after the sprue which catches the first bit of plastic which may have solidified in the nozzle. Sprue A bushing that connects the nozzle to the mold.
Plastic travels along the sprue to get to the mold.
Nozzle Connects the machine to the mold. It is located on the end of the screw. There are various types, each specifically designed for a specific purpose. Most nozzles have some type of shut off valve which prevents the backflow of plastic over the screw when injecting. Carriage Pullback Cylinder Separates the barrel assembly from the mold Heaters Used to heat and maintain constant temperature of the plastic.