National Forge Company

Hendrik Van Leemput

An improved method for isostatically molding an elongated, cylindrical article from a powdered material. In accordance with the improved method, a mold, containing powdered material, is placed within a two-piece, perforated canister. The two pieces which form the canister are then resiliently clamped together. Thereafter, in accordance with conventional practice, the canister and the mold containing the powdered material are subjected to an isostatic pressing process. During the decompression step of this process, the mold may radially expand by pressing outwardly against the two-piece canister and thereby causing radial movement of the two-piece canister. By the use of this improved process, it has been found that long, slender rods can be isostatically molded whereas many prior art attempts to mold such rods have not been successful.

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Hendrik Van Leemput