MILLING SET FOR DISK MILL Russian patent published in 2006 - IPC D21D1/30 B02C7/12 

FIELD: milling equipment for disk mills used in pulp-and-paper industry, chemical and construction industry.

SUBSTANCE: milling set for disk mill has arcuate members of connecting webs 6, 7, 8 and 9, connecting webs being arranged eccentrically to center O of disks. Connecting webs 6 and 7 are located within channels 12 between knives, and connecting webs 8 and 9 are located within channels 4 between knives. Working surface of sections is equipped with two additional central conical annular zones B and C. Zone B is joined to inlet surrounding edge 5 of peripheral front annular zone A at an angle of 5-9 deg with respect to supporting plane of sections. Zone C is inclined at an angle of 22-26 deg with respect to supporting surface of sections. At the side of inlet surrounding edge 1 of sections, open integral channels between knives are arranged in alternation with channels 12 positioned between knives and closed with additional connecting webs 13 defining integral doubled knives 3. All knives are arranged tangentially to circle of disk inlet opening. Non-operating bottom surface of sections is equipped with additional conical zone D defined by non-operating surfaces of integral channels 4 between knives and non-operating surfaces of channel 12 of integral doubled knives 3, with generatrix of said surface being inclined at an angle γ=4-8 deg relative to supporting surface of sections.

EFFECT: improved quality of milling owing to increased time of passage of fibrous semi-finished product through milling zone and increased number of high-quality cycles acting upon fiber, intensified process owing to increased number of mechanical and hydrodynamic actions upon fibrous semi-finished product per one passage through gap between knives, and improved quality of product due to preliminary processing of product before it gets into peripheral front annular final milling zone.

3 cl, 5 dwg