Regel- und Verschlusseinrichtung für extrudierten plastisch verformbaren Werkstoff

Abstract

In the control and closure device, a duct (7) through which material (5) can be conveyed to the outlet nozzle is routed through the flange (1). Two pistons (2) are guided into the duct on two opposite sides. At least one piston (2, 3) is mounted and guided in a translationally movable and/or rotatable manner. In one of the pistons (2, 3) there is formed an opening which opens into a duct (6) which is routed through said piston (2, 3) and which in turn opens into a bypass nozzle (4). On the outer lateral surface of the at least one piston (2, 3) there is formed a groove (8) through which material can be conveyed in the direction of the outlet nozzle. The piston (2, 3) can be rotated in such a way that there is a connection to the outlet nozzle. The free cross section is changed during a translational and/or rotational movement of the piston (2, 3). A piston (2, 3) can be rotated in such a way that control of the volumetric flow of the material (5) passing through the duct (7) can be achieved. Upon closure of the duct (7), the opening can be positioned such that material (5) can be conveyed