The article discusses the influence of the post-process on the mechanical properties of elements produced with the use of the mask stereolithography (mSLA) method. Printed samples were subjected to the following post-process steps: Washing and post-curing, at various times. Then, static tensile and static bending tests were carried out, as well as Shore D hardness measurements for the inner and surface part of the sample, as well as profilographometric analysis of the surface. The post-curing time has been found to strongly affect the tensile and bending strength of printouts, and to improve their surface quality. Washing has an ambiguous effect on the strength of the printouts, but, in the end, it was found that extended washing slightly reduces the strength. Washing significantly affects the quality of the printout surface. A washing time that is too short results in a surface that strongly resembles the printing process, with high roughness. Increasing the washing time to 10 min lowers the roughness by one order of magnitude. Post-curing has also been shown to be beneficial for the cured sample with the application of shielding water. This approach results in an improvement in the flexural strength of the printouts. In general, the obtained research results indicate that, for printouts with cross-sectional dimensions of several mm, the optimal washing time is no more than 10 min and the post-curing time is at least 30 min.

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In the paper the magnetorheological clutch prototype (MR clutch) is presented. The results of measurements of electromechanical parameters of the clutch are presented as curves of clutching torque vs. current of the MR clutch's coil T C (I). The results of thermal measurements of the MR clutch as heating curves are presented. On base of the thermal measurements the influence of temperature on clutching torque is obtained. The thermal field analysis of the MR clutch at full slip state is described. On the base of the thermal field analysis the operation range at full slip state for the MR clutch is determined. Streszczenie. W artykule przedstawiono prototyp sprzęgła elektromagnetycznego z cieczą magnetoreologiczną. Przedstawiono wyniki badań laboratoryjnych momentu sprzęgającego T C w funkcji prądu sterującego. Zaprezentowano również wyniki pomiarów cieplnych sprzęgła. Ostatnia część artykułu poświęcona jest omówieniu wyników analizy cieplnej sprzęgła z wykorzystaniem metod polowych. Zidentyfikowano źródła ciepła odpowiadające pracy sprzęgła w pełnym poślizgu (s=1) i dla tego przypadku przeprowadzono obliczenia. Na podstawie wyników obliczeń określono dopuszczalny i niedopuszczalny zakres ciągłej pracy sprzęgła. (Analiza pracy sprzęgła z cieczą magnetoreologiczną pracującego w stanie pełnego poślizgu)