Patent ID: 6540005
Filing Date: 2003-04-01
Classification: B22C

Abstract:
A method of preparing a casting mold (1) comprising at least one mold cavity (60) adapted to receive molten metal directed to said cavity (60) via at least one pouring gate (2) opening out into a runner (3) extending downstream from the at least one pouring gate (2) to said at least one cavity (60), said method being implemented in an automatic casting machine and including a step of preparing two mold halves (1a, 1b) together on a substantially vertical parting face (4), the method being characterized in that it comprises the following steps:providing a first recess (2) in a first half (1a) of the mold (1) to form a first pouring gate (2) extending to the parting face (4); providing a housing (5) in the parting face (4) substantially parallel to said parting face (4) and at a periphery of the first recess (2), a top portion of the housing presenting a top opening (6), said housing (5) having predetermined dimensions parallel to said parting face (4) that are greater than those of said first pouring gate (2) and having predetermined thickness in a direction (7) perpendicular to said parting face (4); providing a second recess (8) in a second half (1b) of the mold (1) having a second opening (9) in the parting face (4) of dimensions that are smaller than the corresponding dimensions of the housing (5), a top portion of said second recess (8) being closed and said second recess communicating downstream with a runner (3); assembling together the two mold halves (1a, 1b) on the parting face (4); and inserting a filter (12) into the housing (5) substantially vertically through the top opening (6) thereof, which filter has dimensions that are perceptibly smaller than the corresponding predetermined dimensions of the housing (5) and which filter filters molten metal so that molten metal poured into the first pouring gate (2) passes through said filter (12) and is then channeled by the second recess (8) towards the runner (3), said inserting step being performed subsequent to said assembling step.