Patent ID: 9061452
Filing Date: 2015-06-23
Classification: B29B,B29C,Y02P

Abstract:
1. An extruder having a housing ( 1 ) comprising at least two conveyor shafts ( 2 , 3 ) having mutually wiping conveyor cross sections that can be driven in the same direction and are disposed in at least two housing bores ( 11 , 12 ) having cylindrical or conical design, the axes ( 15 , 16 ) thereof being disposed parallel to or at an angle to each other, the distance (A) between the axes of the two housing bores ( 11 , 12 ) being greater than D/1.4142, where D is the diameter of the cylindrical bore or the greatest diameter of the conical bore, and a clearance (a*) being provided between the housing bores ( 11 , 12 ) and the outer diameter (DE) of the conveyor shafts ( 2 , 3 ), characterized in that each conveyor shaft ( 2 , 3 ) comprises a plurality of conveyor segments ( 17 a through d , 18 a through d ) and the offset angle of at least two adjacent conveyor segments ( 17 a , 17 b , 18 a , 18 b ) on each conveyor shaft ( 2 , 3 ) relative to each other is 180°, wherein the center point (PM) of the cross sectional profile of each conveyor segment ( 17 a , 17 b , 18 a , 18 b , etc.) is offset eccentrically relative to the center point of the housing bore ( 11 , 12 ) and the center of rotation (DM) of the conveyor shaft ( 2 , 3 ), wherein the center point (PM) of the cross sectional profile of each conveyor shaft ( 2 , 3 ) is formed by the intersection of the two mirror planes (x, y) of the cross sectional profile of the conveyor shaft ( 2 , 3 ).