To measure the pressure inside the cavity of molding tool can be used several ways of measuring. In this master's thesis we presented indirect pressure measuring through the ejection part of the tool. A measuring sensor was used to measure the force with a measuring range from 0 to 35 kN. It was checked the influence of the runner size and different molding compound on pressure inside the cavity. Values were monitored on three cavities, so the influence of the runner direction on the injection degree and the maximum pressure reached inside the cavity could be determined. The parameters that were changed and observed for their effect on the actual pressure inside the cavity are the diameters of the runners, the molding compound and the set pressure parameters on molding machine. A comparison of the achieved pressures was made at various injection conditions and the influence of the cavity position.
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