Homogenizing extruders

Abstract

Abstract AN EXTRUDER FOR THE PROCESSING OF THERMOPLASTIC MATERIAL COMPRISING: A BODY HAVING A BORE EXTENDING GENERALLY LONGITUDINALLY THERETHROUGH, HAVING A FEED OPENING FOR THE INTRODUCTION OF MATERIAL TO BE PROCESSED, SAID OPENING BEING DISPOSED IN SAID BODY GENERALLY AT ONE END OF SAID BORE, AND HAVING A DISCHARGE OPENING GENERALLY AT THE OPPOSITE END OF SAID BORE, AND A ROTOR DISPOSED IN SAID BORE FOR ROTARY MOVEMENT THEREIN DEFINING A FEED SECTION, A MIXING SECTION AND A DISCHARGE SECTION, MEANS FOR ROTATING SAID ROTOR, A FIRST HELICAL THREAD CONVOLUTION DISPOSED ON SAID ROTOR FORMING A PRIMARY FLIGHT EXTENDING SUBSTANTIALLY CONTINUOUSLY THROUGHOUT SAID FEED, MIXING AND DISCHARGE SECTIONS, SAID ADJACENT CONVOLUTIONS OF SAID THREAD FORMING A CHANNEL THEREBETWEEN FOR CONVEYING SAID MATERIAL, A SECOND HELICAL THREAD CONVOLUTION DISPOSED ON SAID ROTOR FORMING A SECONDARY FLIGHT EXTENDING SUBSTANTIALLY COEXTENSIVELY WITH SAID PRIMARY FLIGHT AND IN SAID CHANNEL BETWEEN SAID PRIMARY FLIGHTS FORMING TWO ADJACENT CHANNELS BETWEEN SAID ADJACENT PRIMARY FLIGHTS, SAID FIRST OF SAID CHANNELS BEING THAT CHANNEL BETWEEN SAID PRIMARY FIGHT AND SAID SECONDARY FLIGHT IN THE DIRECTION OPPOSITE ROTATION BEING DENOTED A PRIMARY CHANNEL AND THE SECOND OF SAID TWO CHANNELS BEING THAT CHANNEL BETWEEN SAID SECONDARY FLIGHT AND SAID NEXT ADJACENT PRIMARY FLIGHT IN THE DIRECTION OPPOSITE ROTATION BEING DENOTED A SECONDARY CHANNEL, SAID PRIMARY CHANNEL INCLUDING A DAM DISPOSED THEREIN AT THE EXIT END OF SAID MIXING SECTION, SAID SECONDARY CHANNEL INCLUDING A DAM DISPOSED THEREIN AT THE ENTRANCE END OF SAID MIXING SECTION WHEREBY MATERIAL TRAVERSING SAID MIXING SECTION IS CONTROLLED TO ENTER SAID SECTION VIA SAID PRIMARY CHANNEL AND EXIT SAID SECTION VIA SAID SECONDARY CHANNEL AFTER HAVING BEEN EXTRUDED OVER SAID SECONDARY FLIGHT. D R A W I N G

Inventors

• 👤 H Scharer

Bibliographic Details