PLASTIC KNEADING AND EXTRUDING APPARATUS WITH EXTRUDERS REVOLVED AROUND CENTRAL SUPPORT TO ALLOW SIMULTANEOUS EXTRUDER OPERATION AND CLEANING OF OTHER EXTRUDERS

摘要

A method of and an apparatus for knead-extruding a plastic resin which are free from the drawbacks encountered in conventional method and apparatus of this kind, and which have a high extrusion operation efficiency, the apparatus being provided with a single auxiliary unit having a screw driving power source and a resin hopper, and a plurality of extrusion units each of which has a resin inlet-carrying cylinder and a screw, the operation of each extrusion unit consisting of an extrusion step for knead-extruding a resin, and a cleaning step for cleaning the screws and cylinders, the extrusion step and cleaning step being carried out alternately in order in each extrusion unit. This invention enables an integrated continuous extrusion operation to be carried out without causing the extrusion steps to be interrupted by the cleaning steps. IMAGE