Plastic Mould

A mold is a hollow metal block into which molten plastic is injected to from a certain fixed shape.The machine heats up the raw plastic until it becomes liquid and then injects air into it like a balloon. The plastic is blown into a shaped mould and as it gets bigger it presses against the mould walls and it starts to take its shape. After the liquid balloon fills the mould it is cooled to keep its shape.