Process for covering solid particles in powder form with a mater

Details Process for covering solid particles in powder form with a mater Process for covering solid particles in powder form with a mater

1992-03-12

1994-04-05

Owens, Terry J.

Coating processes

Solid particles or fibers applied

Uniting particles to form continuous coating with...

427212, 427221, 427222, 427240, 118 52, 264114, B05D 700

Patent

active

053003179

ABSTRACT:
A process for coating solid particles in powder form with a material which is solid or of high viscosity at room temperature. A device for carrying out the process comprises a housing (1) with a conical surface (16) and a rotor (7) mounted in the housing and provided with a conical surface (9). The housing has an inlet (20) through which a melt of the solid material can be supplied to a gap between the conical surfaces of the housing and the rotor and an inlet (12) for supplying powder material to the top surface (8a) of the rotor. As the rotor rotates, a film is formed on the conical surface of the housing and at the same time powder is slung, with the aid of vanes (10) on the rotor against the film. The material is worked and pressed out through an outlet (30) by wings (11) on the rotor.

REFERENCES:
patent: 4690834 (1987-09-01), Appelgren
patent: 4935246 (1990-06-01), Ahrens
patent: 5061520 (1991-10-01), Hermelin

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