Plunger is basically used to give shape to the glass bottler it is inserted into a mold that contains a gob (a hot, molten glass piece). The plunger presses the gob into the mold to form a preliminary shape, called a parison. We manufacture both the types of plunger press and blow plunger along with  blow and blow  plunger we also do colomony  welding on plungers.