METHOD OF COLD MOLDING OF BLANKS OF POWDER MATERIAL AND APPARATUS FOR PERFORMING THE SAME Russian patent published in 1995 - IPC

FIELD: powder blank production. SUBSTANCE: method of cold molding of blanks comprises steps of single-side applying of an axial effort, multiside applying of lateral compression efforts and shearing efforts, normal relative to the axial effort, and single-side applying of an axial effort, opposite to the initial axial effort. Apparatus for performing the method includes a die, having, for example, four joined molding members, placed in the same plane and mounted in a casing, having cone surfaces, joined with respective cone surfaces of the molding members of the die. An upper and a lower punches are arranged in central openings of clamping plates. The casing is provided by a drive unit for reciprocation motion of it along an axis of the die. Each molding member of the die is spring-loaded relative to the casing by an elastic member. EFFECT: increased compactness of blanks, consisting up to 90% of theoretical one, elimination of different compaction degree of blanks, mainly of hard-to-deform fragile powder materials. 3 cl, 2 dwg