36 Cavities HDPE Plastic Bottle Closures Compression Moulding Machine is used for the process of molding in which a preheated polymer is placed into an open, heated mold cavity. The mold is then closed with a top plug and compressed in order to have the material contact all areas of the mold. 36 Cavities HDPE Plastic Bottle Closures Compression Moulding Machine goes through varied quality checks before the final dispatch from our unit.