Technical solutions for regulating the increase in the speed of controlled outflow of sand-air mixture

The paper proposes three-dimensional model of the design of an improved sand supply system using the effect of vibration liquefaction using a one-way piston pneumatic vibropulsator for smooth continuous regulation of the sand amount from the sandbox nozzle body and the ejection use of an additional amount of air through a gas jet injector to increase the ejection rate of the sand-air outflow mixture with separate independent supply of compressed air to the injector. The results of modeling the transportation of a sand-air mixture in order to determine the dependence of the outflow rate and mass flow rate of compressed air on the pressure in front of the working nozzle of a gas-jet injector for two different diameters of the nozzle flow section of 3.9 and 5 mm are presented. According to the results obtained, to implement the regulation of the speed of transportation of the sand-air mixture by controlling the pressure of the compressed air supplied to the working nozzle of the gas-jet injector, in order to compensate for losses due to various resistances in the sand supply system, it is more rational to use a nozzle with a diameter of the passage section of 5 mm.

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