EXTRUDER FOR FODDER MASS PREPARATION Russian patent published in 2009 - IPC A23N17/00 

FIELD: agriculture.

SUBSTANCE: extruder is designed as consisting of a housing equipped with a charging cone with the extrusion and feeding augers mounted inside the housing. The feeding auger, fabricated of an ordinary helicoid shaped resilient strip, encompasses the rear part of the extrusion auger rear end shank with a clearance left between the feeding auger and the shank rear part. The feeding auger is attached onto the shank with its rear coil. Additionally the extruder is equipped with a device enabling regulation of pressure inside the housing, there being a chamber arranged between the extrusion auger rear coil and the feeding auger front coil. The aforesaid auger coils form the chamber foundation with the side surfaces being represented by the housing wall and the shank front part. The shank front is a cone frustum shaped with the cone larger base turned towards the extrusion auger rear coil, the latter's inner diameter being equal to the diameter of the specified cone larger base turned towards it. The shank rear part diameter is equal to that of the cone frustum smaller base. The feeder auger, when drawn in, rests on the shank rear end.

EFFECT: reduction of the extruder overall dimensions resulting in decrease of the device fabrication process metal intensity without detriment to the device's ability to maintain the preset level of extrusion stability.

1 dwg