Abstract
The extrusion of the ceramic casting cores requites the knowing of the value of the discharge product swelling in order to correct adequately the form of the extrusion head for the compensation of this phenomenon. On basis of the experimental determinations of the swelling phenomenon through annular capillary tubes, the variation curves of the swelling coefficient have been plotted, depending on the shearing stress for two values of the humidities (w = 40% and w = 45%). The results obtained for the respective phenomenon, determined in another paper, for capillary tubes with full circular section, have been studied.
Cuvinte cheie
swelling phenomenon
ceramic pastes.