How to Improve Output with a Cashew Coating Machine
The dual‑station continuous automatic cashew coating machine is a fully automatic dual‑batch continuous coating system specially designed for nuts such as cashews, peanuts, and green peas. It realizes full automation from quantitative feeding, powder feeding, liquid feeding, coating, and discharging. With dual‑station alternating operation, it greatly improves production efficiency while ensuring the uniformity and consistency of each coating batch. It has become the core equipment for large‑scale production of flavored nuts, such as crispy cashews and honey-butter cashews.
I. Equipment structure of dual‑station continuous automatic cashew coating machine
According to equipment documentation, the machine is mainly composed of the following six core systems, which work together to achieve precise, continuous, and automatic coating operation:
① Feeding system
- Raw materials are stored in a hopper and automatically discharged under PLC control.
- Automatic weighing through a weighing hopper, precisely controlling the batch input amount.
- After weighing, automatically put into the coating drum, realizing quantitative feeding.
② Coating system
- The core is a dual‑station coating drum (rotating-disc type) that can operate independently.
- The rotating disc drives the material to continuously tumble, making the cashews evenly coated during motion.
- Dual‑batch continuous operation: while one station is coating, the other can discharge/prepare material.
③ Liquid feeding system
- Uses a volumetric pump or peristaltic pump to accurately deliver seasoning liquid.
- Cooperates with a high‑speed liquid-spraying disc to atomize the liquid and evenly spray it onto the cashew surface.
- No adhesion, no clogging, uniform attachment.
④ Powder feeding system
- Automatic quantitative powder feeding device, inputs mixed powder according to process parameters.
- Precise ratio of powder input to raw material weight, reducing waste.
- An optional vacuum powder feeding or sieving device to improve the environment.
⑤ PLC electrical control system
- The whole machine is fully automatically controlled by PLC, operated via a touch screen.
- Parameters such as feed amount, liquid amount, powder amount, coating cycles, and rotation speed can be set.
- Recipe storage function, one‑key recall for different products.
⑥ Main frame
- Made of food‑grade 304 stainless steel, sturdy structure.
- Easy‑clean design, meets food hygiene requirements.
[Internal structure schematic]
① Feeding hopper ② Weighing hopper ③ Coating drum ④ Liquid spraying disc ⑤ Powder feeder ⑥ Control box
Dual‑station independent coating drums can operate alternately.
II. Dual‑station continuous working principle
The core of the dual‑station design lies in “dual‑batch continuous operation”. The specific process is as follows :
Station A: feeding → liquid spraying + powder sprinkling cycle coating → station A discharging Station B: feeding → liquid spraying + powder sprinkling cycle coating → station B discharging
When station A is performing a coating operation, station B can simultaneously discharge or prepare material. The two stations operate alternately, achieving continuous, uninterrupted production. The number of coating cycles (i.e., liquid spraying and powder sprinkling cycles) depends on the product process requirements and can be adjusted to accommodate different coating thicknesses (e.g., light or thick, crispy). Throughout the process, the PLC precisely controls the amounts of powder and liquid added each time, ensuring high consistency in product quality for each batch.
III. Core advantages of dual‑station continuous automatic coating
High efficiency
Dual‑station alternating operation enables continuous production and increases efficiency by over 80% compared to single‑station operation, meeting large‑scale industrial needs.
High uniformity
Rotating disc drives material to tumble in 3D, combined with atomized liquid spraying and uniform powder sprinkling, ensures that powder and liquid fully contact the cashew surface, with uniform coating thickness and no local over‑thick or uncovered areas.
️ Precise quantitative control
Weighing hopper precisely controls batch input; a volumetric pump and a quantitative powder feeder ensure consistent liquid and powder addition each time, guaranteeing repeatability between batches.
Extremely low breakage rate
Cashews are relatively fragile nuts; this machine adopts a gentle tumbling principle, with no strong mechanical stirring, and the coating process does not damage the kernels, maintaining the whole kernel rate.
Flexible recipe adjustment
PLC stores multiple sets of recipe parameters; one‑key recall when switching products, suitable for various coating types such as crispy cashews, honey butter cashews, charcoal roasted cashews, etc.
Hygienic and easy to clean
Whole machine stainless steel, contact parts easy to disassemble and clean; optional dust removal system keeps workshop clean.
IV. Technical parameters
| Parameter | description |
| Capacity | 150‑250 kg/h (depending on product) |
| Batch weight per station | Value/description |
| Coating drum diameter | ~800 mm (each station) |
| Rotation speed | variable, 0‑40 rpm |
| Liquid feeding pump | Value/description |
| Powder feeding method | peristaltic/volumetric pump, adjustable flow |
| Control system | PLC + HMI touch screen |
| Material contact parts | SUS304 stainless steel |
| Overall dimensions (approx.) | 2200(L) × 1500(W) × 2000(H) mm |
V. Supporting processes and downstream equipment
Coated cashews usually need to be dried or fried to fix the coating and achieve a crispy texture. Recommended supporting equipment:
- Horizontal swing dryer – especially suitable for thick‑coated cashews; swinging motion prevents adhesion, hot air circulation dries evenly, and a low breakage rate.
- Continuous hot-air oven/frying line – choose baking or frying based on the process, enabling large‑scale continuous production.
Complete production line process:
Cashew raw material → Dual‑station coating machine → Swing dryer → Seasoning machine → Cooling machine → Packaging machine
VI. Application cases and industry verification
According to equipment manufacturer data, the automatic coating machine has been widely used in the nut roasting industry. User feedback highlights the following advantages [citation:3][citation:4]:
- When producing crispy cashews, coating uniformity improved, and the reject rate was reduced by 30%.
- Dual‑station continuous operation meets production demands of over 5 tons per day.
- Recipe storage function: switching products takes only 5 minutes, enabling multi‑variety small‑batch customization.
Conclusion
The dual‑station continuous automatic cashew coating machine, with its precise equipment design and unique dual‑station configuration, delivers efficient, uniform, precise, and flexible coating production. It not only greatly improves production efficiency but also ensures stable quality of each cashew coating through PLC quantitative control, making it an indispensable core piece of equipment in modern flavored nut production lines. Choosing the right coating machine and matching it with a reasonable drying system will help enterprises achieve product upgrading and a capacity leap.