Multistage machine for the plastification and extrusion of synthetic plastic materials

Abstract

Abstract A MACHINE FOR PLASTICIZING AND EXTRUDING PULVERULENT THERMOPLASTIC OR DUROPLASTIC MATERIAL HAS A FIRST STAGE WITH A BARREL FOR TWO INTERMESHING PLASTICIZING AND METERING SCREWS WHICH CONVEY PLASTIC MATERIAL FROM THE CENTER TOWARD BOTH ENDS OF THE BARREL AND A SECOND STAGE HAVING A BARREL FOR ONE OR TWO EXTRUDING SCREWS WHICH SERVE TO CONVEY PLASTICIZED MATERIAL FROM THE ENDS TOWARD A DISCHARGE OPENING IN THE CENTER OF THE RESPECTIVE BARREL. THE ENDS OF THE BARREL IN THE SECOND STAGE COMMUNICATE WITH THE ENDS OF THE BARREL IN THE FIRST STAGE. THE DRIVE FOR THE SCREWS HAS A SINGLE ELECTRIC MOTOR WHICH ROTATES THE SCREWS BY WAY OF GEAR TRANSMISSIONS WITH INTERCHANGEABLE GEARS. THE SCREW OR SCREWS OF THE SECOND STAGE TRANSMIT TORQUE TO THE SCREWS OF THE FIRST STAGE AND THE SCREW OR SCREWS OF THE SECOND STAGE CAN BE REMOVED OR REINSERTED BY MOVING AXIALLY THROUGH A GEAR OF AT LEAST ONE OF THE TRANSMISSIONS WHICH DRIVE THE SCREWS OF THE FIRST STAGE. THE BARREL OF THE FIRST STAGE CAN BE OPENED LENGTHWISE TO AFFORD ACCESS TO THE RESPECTIVE SCREWS.

Inventors

• 👤 Rudolf P Fritsch

Bibliographic Details