Patent ID: 6749005
Filing Date: 2004-06-15
Classification: B22D

Abstract:
A sealing arrangement for a die-casting machine comprising:a casting chamber; a melting or holding furnace for holding melted metal; a suction pipe for effecting transport of metal from the melting or holding furnace into the casting chamber; a casting piston connected to a piston rod at a connecting thread for insertion into the casting chamber, wherein the casting piston has at least two portions with different diameters D1 and D2, wherein D1 is greater than D2, the smaller diameter D2 being the diameter of a rear end of the casting piston; a suction box disposed about the casting piston adjacent said casting chamber and removed from said suction pipe, said suction box adapted to remove metal residues from the casting piston portion with the greater diameter D1; and a seal having an opening with a diameter substantially equal to said smaller diameter D2 and being arranged between the casting piston and the suction box to form a seal between the casting piston and the suction box, wherein the seal is in front of the piston rod when the casting piston is in a retracted position, and wherein the seal is not in communication with the casting piston portion with the greater diameter D1.