From traditional jumbo porridge oats to rapid-cooking flakes, producing a consistent commercial product requires precise mechanical control. Our partners at FH Schule recently shared a visual walk-through illustrating the core processing stages that take raw oat kernels through to finished flakes. It offers a clear, concise look at a process that looks simple on the surface, but relies on sophisticated engineering behind the scenes.
Download the original presentation: How does an oat kernel become a flake?
Because oat processing is a sector we actively support across the UK and Ireland, supplying, installing, and servicing Schule processing lines, we’ve explored the mechanical and process engineering involved.
The oat processing route begins with whole hulled oat kernels or cut oat groats, depending on the targeted end-product. Whole oat kernels are used to produce large, intact “jumbo” oats popular in premium breakfast cereals, and steel-cut groats are processed into smaller, quick-cooking or quick-hydrating flakes. Ensuring a clean, uniformly sized feed through initial cleaning and dehulling stages is vital to preventing uneven thermal absorption during conditioning.
Raw oats cannot be rolled directly into stable flakes without prior thermal treatment. The grain must pass through a hydrothermal treatment trough where steam is applied directly to the kernels or groats. This steam treatment serves three key operational purposes:
– Plasticising the kernel: Softening the oat matrix so it flattens under roller pressure without shattering into fine flour or dust.
– Enzyme inactivation: Deactivating lipase enzymes to prevent lipid breakdown and extend shelf life.
– Moisture alignment: Raising product moisture to the optimal level for consistent plastic deformation.
Once conditioned, steamed oats feed directly into the SCHULE flaking roller mill. Achieving exact flake thickness requires high-rigidity roll standards and precise gap management. The gap between the two heavy-duty flaking rolls dictates the final thickness of the flake. Modern FH Schule flaking mills utilise automated, recipe-driven gap controls, allowing plant operators to switch seamlessly between thick jumbo oats and thin quick-cooking flakes with high repeatability and zero manual guesswork.
After flaking, drying, and cooling, the product passes through the FH Schule MultiSense inline monitoring system. Rather than relying purely on off-line laboratory sampling, the MultiSense continuously monitors critical product parameters such as moisture content, temperature, bulk density, and flow rate in real time. If any reading drifts outside specified tolerances, the system provides feedback to the flaking control unit, allowing process parameters to be adjusted automatically to maintain strict product consistency.
Whether upgrading an existing flaking line or developing a complete new oat processing plant, Turner Process Equipment Ltd supplies the full range of FH Schule dehulling, cleaning, hydrothermal, and flaking machinery. Supported by our sister divisions, Turner Engineering & Project Management Ltd and Turner Fabrication & Site Services Ltd, we deliver complete turnkey project execution, installation, and long-term aftermarket spare parts support. Speak to the Turner engineering team today to find out more.