Patent ID: 8469080

Claim:
A digital processing method of large or medium-size sand mold, comprising the steps of: a) selecting a processing cutter and designing a cutter path according to a three-dimensional CAD model of a casting mold; b) deleting short lines with little distance in a processing path by a path optimization according to size and precision requirement of part to be processed; c) generating processing codes acceptable to a processing equipment according to the designed path and processing parameters; d) selecting appropriate molding sand and binding agent according to casting technique requirement so as to manufacture sand blank used in a numerical control processing; e) placing the sand blank on a hollow grid-shaped processing platform to proceed a digital milling processing; f) taking away waste sand generated during processing by high pressure gas blown out from a nozzle near a cutter head, and allowing the waste sand to enter into a collecting device below the processing platform through meshes of the processing platform; and g) performing a post processing to the finished sand mold.