AUGER ELEMENTS FOR EXTRUSION OF VISCOELASTIC COMPOUNDS, APPLICATION AND PROCESS Russian patent published in 2015 - IPC B29C47/40 

FIELD: process engineering.

SUBSTANCE: invention relates to auger elements for multishaft auger machines with paired augers running in one direction, their application and extrusion of viscoelastic compounds. Profiles of adjacent auger elements are different and asymmetric. In every case, each auger element has sole section of ledge. SKW sum of all angles of the ledge of adjacent auger element pair is larger than, 0 smaller than $$2\pi -4\cdot \arccos \left(\frac{A}{DE}\right).$$ Free areas of cross-sections $$F_1^{frei}$$ and $$F_2^{frei}$$ of adjacent auger elements differ in magnitude.

EFFECT: efficient extrusion, fine extrudate, lower power transfer to extruded material.

14 cl, 3 dwg