Method and system for controlling a layer thickness in a grindin

Details Method and system for controlling a layer thickness in a grindin Method and system for controlling a layer thickness in a grindin

1993-10-27

1995-01-10

Eley, Timothy V.

Solid material comminution or disintegration

Processes

Miscellaneous

241 34, 241 36, 241 37, 241159, B02C 432, B02C 904

Patent

active

053799500

ABSTRACT:
A method is described for controlling the grinding of a dispersion of solid particles in a doughy-pasty mass, such as a chocolate mass, on a roller mill line having at least one preceding and one postponed roller mill (1 or 4), of which at east the postponed roller mill (4) is a roll refiner mill with a plurality of rollers (W1-W5). In this arrangement, the outlet roller gap of the preceding roller mill (1) is changed for decreasing or increasing the layer thickness of the mass in the postponed roller mill (4) having at least three rollers. Additionally and besides changing the outlet roller gap of the preceding roller mill (1) a control of the layer thickness of the postponed roller mill (4) is carried out according to a proportional-integral-differential control system. In doing so, the layer thickness can be measured on the postponed roller mill (4) within predetermined limits, with a change-over to the control system of the preceding roller mill (1) taking place upon exceeding these limits due to the difference of the actual thickness to the nominal layer thickness.

REFERENCES:
patent: 801259 (1905-10-01), Neumann
patent: 2545921 (1951-03-01), Goodwillie et al.
patent: 3010663 (1961-11-01), Bosshard
patent: 3292869 (1966-12-01), Beyeler
patent: 3445070 (1969-05-01), Verdier
patent: 3600747 (1971-08-01), McCarty
patent: 4603815 (1986-08-01), Ripani et al.
patent: 4746070 (1988-05-01), Kuster
patent: 5072887 (1991-12-01), Thom, Jr.

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