SCREW ELEMENTS FOR MULTI-SHAFT SCREW-TYPE MACHINES Russian patent published in 2018 - IPC B29C47/40 B29C47/60 

FIELD: machine building.

SUBSTANCE: invention relates to screw elements for multi-shaft screw machines. Result is achieved by screw elements for multi-shaft screw machines with screw shafts rotating in pairs in one direction. Said screw elements scrape off one another precisely and the screw shafts composed of said screw elements have two or more screw flights. Screw profiles can be represented over the entire cross section by respective profile curves. Each profile curve has at least one inflection point lying inside an outer radius of the profile curve over the progression thereof. Ratio of the radius of curvature of the profile of the screw to the outer radius of the profile at the point that scrapes the body ranges from 0.2 to 0.8, and the ratio of the outer radius of the screw element to the distance for two-flight screw elements ranges from 0.54 to 0.7, for three-flight screw elements it is between 0.53 and 0.57, and for four-flight screw elements it is between 0.515 and 0.535.

EFFECT: improving dispersion efficiency with minimal power supply.

15 cl, 3 dwg