The compressional motion can be done by injection compression molding machine itself or separate mechanism linked with traditional injection molding machine. The mechanism is normally hydraulic-designed. It pushes mold plates or necessary cores to compress prior-filled melt then a finished part is made. To complete a process cycle, the mechanism is normally also integrated/programmed with injection molding machine so that its actuation/ending timing signal of compressional motion can be sent from/to injection molding machine.
Die casting is a process in which the liquid metal or semi-liquid metal is forced into a reusable die very fast with high pressure and temperature.
Molten metal is injected into steel dies, high pressure ensure molten metal fills the empty space between the die halves, while metal is held in the die, it solidifies and cools, when solidification and cooling is completed, the die is opened, then the solid die casting is ejected. Die casting parts are usually made of aluminum, zinc alloy, it's much strong than plastic molded parts, parts made by die casting is widely employed in many different industries.