Seasoning systems
A seasoning system is equipment that applies powder, oil or slurry flavourings evenly to food as it moves along a production line. On a snack line the seasoning system sits after the fryer, oven or extruder dryer and before the weigher and packaging machine. Product arrives warm and, in many cases, with a thin film of oil on its surface, which helps powder stick. The system has to coat every piece evenly without breaking it, and it has to do so at the rate the rest of the line runs. The most common design is the tumble drum, a rotating inclined drum through which product travels while seasoning is fed in. Powder is metered by an auger, vibratory feeder or scarf plate that spreads it across the drum, and oil or oil-based slurries are applied through spray nozzles. Some systems add electrostatic charging so that fine powder is attracted to the product, which improves adhesion and reduces airborne dust. Lines are arranged either on-machine, where each packaging machine has its own seasoning drum just before the weigher, or off-machine, where seasoning happens centrally after cooking and the flavoured product is distributed to several packers. On-machine systems make flavour changes faster and reduce the amount of flavoured product left on conveyors; central systems are simpler when a line runs one flavour for long periods. Seasoning systems are used for potato chips, extruded and pellet snacks, nuts, popcorn, crackers, breakfast cereals, pet food and coated vegetables. They also apply oil sprays and coatings in bakery and cereal lines. Performance and cost are driven by coating uniformity, the accuracy of the feed rate relative to product flow, seasoning waste and dust, the speed of flavour changeovers, and how easily the drum and feeders can be cleaned to avoid allergen cross-contact. Seasoning is often expensive per kilogram, so an accurate, well-controlled system can pay for itself through lower overdosing and less waste on the floor.
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Buying criteria
Decide between on-machine and central seasoning based on how many flavours you run and how often you change them. Frequent changes favour on-machine systems close to each packer. Check feed accuracy and control. The system should link seasoning feed to product flow so the coating stays even when line speed changes. Ask how the feed rate is measured and adjusted. Consider product fragility and the seasoning type. Tumbling action, drum angle and speed must suit your product, and powder, oil and slurry each need suitable feeders and spray systems. Plan for cleaning and allergens. Tool-free removal of drums and feeders, smooth surfaces and dust extraction shorten changeovers and reduce cross-contact risk between flavours with different allergens. Ask how long a full flavour change takes, including cleaning and verification, since that time is lost production on every change.
Buyers ask
How much does a snack seasoning system cost?
It depends on the number of seasoning points, the type of feeder and applicator, whether oil or slurry spraying is included, and the level of control. Simple single-drum systems cost less than central systems with several drums, electrostatic application, dust extraction and automatic feed-rate control linked to line speed. Integration with conveyors and weighers also adds cost.
What is on-machine seasoning?
On-machine seasoning places a small seasoning drum directly in front of each packaging line's weigher. Plain product is distributed to each packer and flavoured just before weighing, so each line can run a different flavour and changeovers waste less product. It is common in plants that make many flavours.
How do you make seasoning stick to snacks?
Apply powder while product is warm and still carries a light surface oil, or spray a measured amount of oil before the powder. Tumbling spreads the seasoning evenly. Electrostatic systems give fine powder a charge so it is attracted to the product, which improves adhesion and cuts dust.
How do you reduce seasoning waste?
Link seasoning feed rate to product flow so the dose follows changes in line speed, keep feeders calibrated, control dust with extraction and enclosed drums, and schedule flavour runs to reduce changeovers. Checking the seasoning level on finished product regularly shows whether the system is overdosing.