Structural design optimization of a multi outlet mold with double based propellant screw extrusion

DOI:	10.11809/bqzbgcxb2023.05.027
Keywords:	propellant; screw extruder; multi outlet mold; simulation; structural optimization
Abstract:	To study the flow process of a double base propellant in a multi outlet screw extruder, this paper investigates the influence of the outlet number on the flow process of the propellant by the single factor method. Then, with the pressure difference in the channel as the constraint condition, orthogonal experiments are carried out on the number of extrusion outlets, mold length and mold shrinkage angle to improve the production efficiency as the optimization objective. The results show that increasing the number of the outlets can increase the output, reduce the maximum pressure difference, and make the production safer and more efficient. The order of the influence degree of mass flow and pressure difference in the channel is the number of outlets > mold length > shrinkage angle. The most reasonable combination of structural parameters is that the number of the outlets is 5, the mold length is 40 mm, and the shrinkage angle is 37 °. Under this condition, the mass flow increases by 17.6%, and the pressure difference in the channel reduces by 25.0% , meeting the requirements of ensuring the propellant compactness.
Issue:	Vol. 44 No. 5 (2023)
Published:	2023-05-28
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