Milling, Grinding & Flaking
Every detail counts.The process used to produce flour in a mill is referred to as a gradual reduction. The endosperm is gradually reduced in particle size by running it between a series of pairs of rotating steel rollers, either corrugated or smooth, and is separated from the bran and germ by running it over sieves. All pairs of rollers in a roller mill have one slow mill and one fast one. The rolls turn in opposite directions, toward each other, pulling the stock between them. The cut, depth, and spiral of the corrugation, together with the rotation differential, determine the aggressiveness of the milling at any particular step.
Hammer mills are designed for grinding a wide variety of products: in flour mills (grain and milling byproducts), in feed mills (animal feeds, pulses), fine-grist production for the mash filtration, in oil mills (extraction meals and crushed expeller cakes) or even grinding pasta scraps. Product is fed to the hammer mill from a feed hopper and is caught by the hammer rotor. Particle size is than reduced until it is passed through the screen jacket surrounding the rotor.
The Bühler flaking roller mill with its associated steamer constitute the heart of a flaking line. I the upstream steamer, the product to be flaked undergoes hydrothermal treatment before being fed to the flaking roller mill. The system is designed for processing whole and cut groats, corn, wheat, barley, buckwheat and rice.