| 摘要 |
<p>An extruder for rubber compounds comprising a screw (1) mounted for rotation in a barrel (2) has an inlet (3) for material to be extruded, a compression section (4), a plasticizing section (5) and an exit section (6) leading to the extrusion head. The plasticizing section (5) is of the Transfermix type, and in the exit section (6) the screw (1) has a circumferential cut (17) extending substantially to the base of the helical screw groove, with the barrel (2) being provided with a set of flow interruptor pins (18) spaced round its circumference. The pins (18) extend radially and substantially to the base of the cut (17) while fitting loosely in it. Throttling members (19) are provided round the pins (18) and are radially adjustable to alter their throttling capability; in a position of maximum throttling they substantially close the flow cross-section of the screw (1). <IMAGE></p> |
