Azerbaijan Technical University, Baku, Azerbaijan

A. A. Dzhafarova, Cand. Eng., Associate Prof., Dept. of Chemical Engineering, Processing and Ecology, e-mail: afetceferova8@gmail.com

Equations for the temperature analogy of the density distribution of powder materials and the flow of powder during the molding of seals of complex shapes are obtained. The contour of a compactor of complex shape is determined, analytical expressions and physical models of the density distribution depending on time during one-sided pressing are obtained, as well as the density distribution during the pressing process with preliminary pressing at different times. Based on the hypothesis of a plane section and plane deformation, the temperature analogy is taken into account when modeling the processes of compaction of a powder body in a closed volume. The complex contour of the compaction for pressing has been determined. The equation of indestructibility during the flow of a powder mixture in a mold with a complex cavity is considered. It has been established that when the powder mixture flows through the complex cavity of the mold matrix, the pressing speed is of great importance. The influence of the pressing scheme on the density distribution in the compact was studied. At the same time, an analysis of the density distribution and powder flow characteristics over a complex mold cavity shows the dominant role of the temperature analogy associated with heat-insulating tips installed on the outer wall of the mold matrix. It has been established that for the upper and lower parts of the compactor, the speeds of the lower and upper punches are equal for any stage of pressing. This pressing scheme is equivalent to compacting whole, that is, non-separable punches. In addition, the speed of the punches is proportional to the current compaction heights in the die. In the case of pre-pressing with bottom under pressing in the final stage of compaction, the speeds of the upper and lower punches become proportional. The proposed temperature analogy is very suitable for modeling pressing processes in closed volumes of a powder mixture.
This work was supported by the Science Foundation of Azerbaijan, grant No. AEF-MGC-2024-2(50)-16/01/1-M-01.

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