Auger shaft

Auger shaft speeds in general Constant up to max. 3 different with pole-changing motors or with switchgear Infinitely variable by motors with speed control... 

Classification by the Arrangement of the Auger Shaft and Direction of Column Exit... 

Other distinguishing features are those with regard to the arrangement of the auger shaft and direction of extrusion ... 

Extruders are classified by the number of auger shafts as follows ... 

Single auger extruders. The single auger extruder with one auger shaft represents the standard design extruder. 

Multiple shaft extruders. Some publications quote a classification for multiple shaft extruders referring to combined de-airing extrusion units defined by the sum of their auger shafts, infeed shafts and mixer shafts. This method of categorization is, however, disputed. 

Auger shaft and mixer shaft arranged on top of each other, feeding in the same direction Option A (commonly used version) mixer shaft above the auger shaft, option B mixer shaft below the auger shafL... 

Auger shaft and mixer shaft arranged on top of each other, feeding in opposite direction... 

Auger shaft horizontal, mixer shaft vertical. 

Auger shaft vertical, mixer shaft horizontal. 

Auger shaft adjustable from horizontal to vertical, i.e. at any angle from... 

Fig. 11 Diagrammatic view of possible position of auger shaft and mixer shaft...

Around 1900 exhusion machines were still in use with front auger shaft bearing located external to the exhuder barrel, with lateral column exit either to one or both sides. 

Since about 1990 the paddle or infeed rolls can also be driven separately, each from a slip-on type geared motor. Frequency control gives infinite variabihty of the paddle shaft speeds, so that these can be optimally adapted to the auger shaft speed (Fig. 38). 

Animals provided driving power for the first upright auger extruders. Initially this was in the form of direct drive using a tie beam that was fastened in a beam shoe at the top end of the auger shaft. This system of drive was... 

Occasionally d.c. motors were used in the 1980s in order to provide an infinitely-variable control of the auger shaft speeds, but since then frequency-controlled squirrel-cage motors have become the standard. 

Schlickeysen builds a special extruder with a small diameter and relatively high auger shaft speed for the extrusion of extruded roofing tiles... 

Bridge Crack. A defect sometimes found in the clay column from an extruder such a crack is likely to be present if the bridge that supports the auger-shaft is too close to the mouthpiece. 

---