Patent ID: 8079509

Claim:
A method for forming a laminate aluminum mold block for forming an article in a forming operation comprising: forming a series of aluminum laminate flat plates with channels to collectively form a tool body; forming draining apertures through the series of aluminum laminate plates in a thickness direction of the plates, the draining apertures being separate from the channels; forming a series of aluminum brazing layers for brazing together adjacent aluminum laminate plates; deoxidizing the series of aluminum laminate plates and the series of aluminum brazing layers; stacking the series of aluminum laminate plates alternating with the aluminum brazing layers between adjacent aluminum laminate plates; pressing the stacked series of alternating aluminum plates and aluminum brazing layers; heating the stacked series of alternating aluminum plates and aluminum brazing layers to a temperature wherein the aluminum brazing layers braze the aluminum laminate plates together, wherein excess braze material drains out of the tool body through the draining apertures during the heating; and forming a finished surface in the tool body by the brazed series of aluminum laminate plates.