Cooling system for press head

A press head for pressing aluminum dross, the press head being provided with means for movement in a vertical direction to press dross contained in a skim box situated beneath the head in which the means for movement of the press head comprises hydraulic ram means, said ram means being operative to raise and lower the press head and characterized in that the press head includes means for the passage of cooling air through the press bead, said means comprising a plurality of air inlet holes proximate to the periphery of the press head, in which said ram means is operative to raise and lower the press head by means of a double acting hydraulic cylinder and an actuating rod, in which the actuating rod is hollow and is connected to the press head to allow cooling air to pass through the hollow rod and the press head, in which the operating rod is elongate and protrudes from both ends of said double acting hydraulic cylinder, at the bottom end being connected to the press head and at the top end being enclosed in a chamber sized to allow movement of the actuating rod within the chamber and in which the chamber includes an air outlet connected to an air blower which pulls air out of the chamber and through the hollow actuating rod.