With the degree of the injection chamber and the punch gap is less than 0.1 mm, a punch and a pressure chamber and forth wearing high temperatures generated by friction, pressure chamber larger diameter, smaller punch, the punch scrap aluminum stuck, impact pressure chamber transfer speed and pressure and refused to accept the force to punch so to use high-temperature lubricants, plunger will open cooling water, but also to choose the punch material, generally used in ductile iron or bronze, etc..