FIELD: process engineering.
SUBSTANCE: invention relates to powder metallurgy. It may be used for making fuel pellets for nuclear reactors and in chemical industry. Moulding is performed in female die with forming hole provided with chamber to receive top male die and with double-sided conical ground sites. The latter feature equal tape and rounded butt. The latter is made opposite the bottom male die face at mould end. Top male die seat surface is rounded by radius defined by relation 
where Rmin is said minimum radius, r is article radius, En is radial modulus of molded piece elasticity at given moulding pressure, τfail is article failure strain at given pressure.
EFFECT: higher quality.
3 dwg
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