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Selected simulation and experimental research of impulse compacting of moulding sand

100%

Mikulczyński T. , Ciskowski S.

2009

tom Vol. 9, iss. 1

57-60

Selected simulation and experimental research of impulse compacting of moulding sand has been presented. The mathematical model used in research was formulated on the ground of mathematical description of the impulse compacting head, as well as mathematical description of the deformation and compacting process of moulding sand. The presented simulating investigations of the mathematical model were performed in the Matlab - Simulink environment. The presented results justify the statement that the suggested mathematical model correctly represents the real course of the impulse compacting process of moulding sands and can be used for describing, designing and optimising the process.

Strength measurement of impulse compacted moulding sand

80%

Mikulczyński T. , Ciskowski S.

2011

tom Vol. 11, iss. 1

79-82

Analysis of impulse compaction process shows that during compaction process moulding sand is subject to deformation and changes of total pressure, measured inside compacted moulding sand, represent fading sinusoid. Measured pressure values in stationary states (after compaction process) are equal to the sum of squeezing pressure pc and the pressure resulting from compacting the sandmix pu, which expresses the obtained strength. Therefore experimental research of moulding sands were conducted. Strength factor Rc and pressure pu values were determined as a function of densening degree \delta. Analysis of presented results proves that pu pressure resulting from compacting of the moulding sand expresses compressive strength factor Rc. This confirms that developed methodology permits strength measurements of moulding sand in the mould. Moreover as it is possible to determine pu values with simulation research of developed mathematical model of impulse process it is possible to determine compressive strength factor.