Prepare mould of multiple ratio powder metallurgy self -lubricating joint inner circle

The utility model discloses a prepare mould of multiple ratio powder metallurgy self -lubricating joint inner circle. The mould includes outer mould, interior mould, last base, lower base, goes up pressure head, lower pressure head. The utility model has the advantages of (1 )This mould chooses for use graphite to be the raw materials, and mould structure is simple, low cost, easy operation, convenience, long service life, (2 )Simultaneously the sintering goes out the powder material's of three kinds of different ratios self -lubricating joint bearing inner circle at every turn, but and every ratio sintering go out two self -lubricating joint bearing inner circles, improved sintering efficiency, reduced the energy resource consumption.