Influence of geometrical parameters of convergent sleeve on the value of limit stress

Abstract

Abstract. This paper presents the results of research on improving the effectiveness of the agglomeration process. Improving effectiveness was obtained as a result of the application of the convergent sleeve. The sleeve is mounted before the multi-holes die in the dry ice agglomeration machine. The empirical part of the paper presents the results of research on which FEM model was based. The numerical part of research presents the FEM model of the agglomeration process. The FEM model with a known uncertainty level was used to determine the influence of geometrical parameters of the sleeve on the limit value of the agglomeration forces. The model will be one of the starting points for the design and construction of the machine for the compaction and granulation of dry ice.

Influence of the face surface shape of the piston on the limit value of compaction stress in the process of dry ice agglomeration

“…In order to determine the characteristics of change of the required force value on the piston FT, as a function of the piston pressure face area ST, a study was carried out according to the methodology described in subject literature [11,19,28,29]. To this end, a durometer by MTS model Insight 50 kN was employed to register the force value and displacement of the measuring head with frequency 10 Hz.…”

“…41.5 g. Next, the piston (3) was introduced into the compacting chamber (2). At the final stage, the head was fastened to the durometer jaws (6). After taring the machine, the experiment was carried out in which the piston system (3) was moved downwards at a constant velocity of 5 mm/s.…”

“…The end product of this process is available in broken down form and exhibits peculiar properties due to its low temperature of approx. -78.5°C and the ability of sublimation in normal conditions [5][6][7][8][9]. The indicated properties make for a broad industrial application for such material, e.g.…”

The influence of geometrical parameters of the forming channel on the boundary value of the axial force in the agglomeration process of dry ice

“…However, due to the large amount of waste, factories are often unable to utilize the entirety of the recovered material for own needs. As a result, liquefied carbon dioxide is sold to interested recipients [1][2][3][4][5][6]. Fig.…”

“…50% of the expanded liquid crystallizes. The final product temperature is -78.5°C and sublimates in normal environmental conditions [5][6][7][8][9][10][11]. Based on the above properties, the material received the popular name of dry ice.…”