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US 4,393,021 AGranted
Method for the manufacture of granular grit for use as abrasives
AssigneeVereinigte Schmirgel und Maschinen-Fabriken AG
InventorsGustav Eisenberg, Gunter Bigorajski
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Abstract
A pasty mix of granular grits, binder and filler is pressed through a sieve web by rolling action to form cylindrical, worm-like extrusions. After hardening in a heating duct the extrusions are subjected to the same action and thereby granular grit particles are formed each of which contains several grits. The apparatus for carrying out the method includes a sieve web which co-operates with a rotor having several freely rotatable rollers around its periphery.
Claims6
A method of producing granular grit particles each including several individual grits comprises the steps of
- mixing the grits with a binding medium, and a filler to form a pasty mass,
- pressing the mass through a mesh by relative rolling motion to form extruded lengths of the mass,
- heating the extruded lengths to harden them, and
- pressing the hardened lengths through a mesh by relative rolling action to form the said required granular grit particles.
1 more element
Dependencies are inferred from the claim text.