Automatic composite press technique for producing cutting inserts
AssigneeGeneral Electric Company
InventorJohn M. Ohno
Life of this patent
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Abstract
A technique for providing an intermediate composite adapted to be reaction sintered to produce a cutting insert includes the steps of positioning a pellet of material disposed within a holder on top of a first plunger within a mold by moving the holder and pellet into alignment with the plunger through the use of a first feeder device. A powder mix is then disposed adjacent to at least a portion of the pellet within the mold by a second feeder device. The powder mix and the pellet are compressed together in the mold to produce the intermediate composite which is then removed from the mold for reaction sintering in accordance with the press and treat technique.
Claims13
A process for providing an intermediate composite adapted to be sintered to produce a cutting insert, comprising the steps of:
- (a) pre-pressing a material into a first pellet having a chamfer such that the size of the top portion of the first pellet is smaller than the bottom portion;
- (b) positioning said first pellet on top of a first plunger within a mold;
- (c) moving the plunger downwardly into the mold, the first pellet thereby moving into the mold;
- (d) depositing a powder mix into the mold to thereby cover the sides and top portion of the first pellet;
- (e) compressing, in said mold, said powder mix and said pellet to produce said intermediate composite;
- and
- (f) removing said intermediate composite from said mold.
A process for providing an intermediate composite adapted to be sintered to produce a cutting insert, comprising the steps of:
- (a) pre-pressing a material into a first pellet having a dome-shaped top;
- (b) positioning said first pellet on top of a first plunger within a mold;
- (c) moving the plunger downwardly into the mold, the first pellet thereby moving into the mold;
- (d) depositing a powder mix into the mold to thereby cover the sides and top portion of the first pellet;
- (e) compressing, in said mold, said powder mix and said pellet to produce said intermediate composite;
- and
- (f) removing said intermediate composite from said mold.
Dependencies are inferred from the claim text.