COMPRESSION METHOD OF BEADS FROM POWDERS OF REFRACTORY METAL AND PRESS MOULD FOR ITS COMPRESSION Russian patent published in 2010 - IPC B22F3/02 B22F3/03 B30B15/02 

FIELD: metallurgy.

SUBSTANCE: invention relates to powder metallurgy, particularly to receiving of beads principally from powders of tungsten, molybdenum. It can be used for manufacturing of rods, wire and bands for illumination engineering, electronic industry and instrument engineering. During compression of beads simultaneously with vertical clamping powder is cogged in horizontal direction with reduction in thickness, equal to reduction in thickness in vertical direction and with specific stress, equal to specific stress in vertical direction. Powder is filled into cavity of press mould, width of which is equal to (1.5-2)B₁, where B₁ - width of finished bead. Press mould contains horizontal punch, contacting by working surface to face surface of vertical punch, installed in casing of press mould with ability of horizontal displacement. Bottom plate of press mould contacts by face surface with working surface of sidewall, mounted in casing with ability of vertical displacement. Punches are spring-loaded relative to casing.

EFFECT: obtained beads allow uniform stress distribution and density by height and width.

2 cl, 3 dwg, 1 tbl