PET bottle blowing machine works by heating and melting PET resin pellets, which are then forced into a mold cavity. The molten plastic is then cooled and solidified, and the bottle is ejected from the mold. The machine is typically equipped with a preform loader, a heating oven, a blowing station, and a bottle ejector. The preform loader loads the PET resin pellets into the heating oven, where they are melted and then forced into the mold cavity. The blowing station then applies pressure to the molten plastic to form the bottle, and the bottle ejector ejects the finished bottle from the mold.