How to Improve Coated Cashew Production Quality
From crispy cashews to honey butter · comprehensive analysis of core coating equipment
The cashew coating machine is the core equipment for producing flavored nuts such as crispy cashews, fish‑skin cashews, and honey butter cashews. By uniformly coating cashews with a seasoning liquid and mixed powder, a crispy outer layer forms, which is then baked or fried to produce rich‑tasting coated cashew products. This article provides a comprehensive reference, from equipment principles and classification, to technical characteristics, supporting processes, and selection points.
I. Overview of Cashew Coating Machine
A cashew coating machine is a piece of food machinery specifically designed for surface coating (powder coating) of cashew kernels and other nuts. Coated products are divided by thickness into: light coating type (charcoal roasted cashews, honey sea salt cashews) and thick coating type (crispy cashews, pastry cashews); by process into coating‑baking type (honey butter cashews) and coating‑frying type (crab roe cashews).
II. Working Principle
Through a drum or rotating disc, the cashews are continuously moved. During the movement, seasoning liquid is sprayed, and powder is sprinkled alternately, so that the powder uniformly adheres to the surface of the cashews, forming a coating layer.
Quantitative feeding → Rotating tumbling → Liquid spraying → Powder sprinkling → Cyclic coating → Automatic discharge
Specific process: Cashews are stored in a hopper, automatically weighed by PLC control, and put into the coating drum; the liquid is atomized and sprayed through a peristaltic pump via a high‑speed liquid spraying disc; the automatic powder feeding system inputs the mixed powder; multiple cycles can be performed according to the process; after coating is completed, it is automatically discharged.
III. Main Types
By automation level
- Manual coating machine: manually controlled, suitable for small batch/experiment
- Semi‑automatic coating machine: partially automatic, for small to medium food factories
- Fully automatic coating machine: PLC-controlled, quantitative feeding/liquid/powder, stable quality
By structure type
- Drum type: horizontal rotating, suitable for thick coating products
- Rotary disc type: rotating disc, uniform coating, suitable for light coating
- Dual‑station continuous type: dual‑batch continuous operation, high efficiency
By functional configuration
- With a powder screening device, remove excess powder after coating
- With angle adjustment: adjust drum tilt angle
- With a dust removal system: vacuum powder feeding, improve the environment
IV. Core Technical Features
️ Precise quantitative control
PLC control, all parameters adjustable, recipe storage, and one‑key recall.
Efficient liquid supply system
Peristaltic pump + spraying disc, atomized spraying, no adhesion, no clogging.
Quantitative powder feeding system
Automatic powder proportioning, high precision, and easy to clean.
Pneumatic seal
Non‑contact seal, solves powder and liquid leakage.
Powder screening & dust removal
Built‑in screen holes + dust removal, to avoid waste.
Angle adjustment
Screw adjustment of tilt angle, convenient discharge.
V. Technical Parameter Reference (based on peanuts)
| Parameter | Typical value range |
| Capacity (kg/h) | 80 – 300 (depending on model) |
| Drum/disc diameter | 600 – 1000 mm |
| Rotation speed | 0 – 40 rpm (adjustable) |
| Liquid feeding pump | Peristaltic pump, flow adjustable |
| Powder feeding method | Screw conveyor / vibration disc |
| Control system | PLC + HMI touch screen |
| Material contact parts | SUS304 stainless steel |
VI. Supporting Production Line Process Flow
Basic process: Cashew raw material → Coating machine coating → Baking/frying → Seasoning → Cooling → Packaging
Two‑stage coating process: Raw material → First coating → Baking → Cooling → Second coating → Seasoning → Drying → Cooling → Packaging
Supporting equipment: Elevator, feeder, cashew coating machine, vacuum powder feeder, automatic powder feeding device, horizontal swing dryer (for thick coating to prevent adhesion), vibration cooler, seasoning machine, and packaging machine.
VII. Why use a swing dryer after coating?
Thick‑coated cashews (crispy cashews, pastry cashews) have a wet, sticky surface after coating and easily stick together. The horizontal swing dryer uses hot air circulation + swinging motion, making the coated cashews move forward while shaking:
Prevent adhesion
Swinging keeps nuts separated during drying
️ Uniform heating
Hot air circulation ensures even drying
Low breakage
Gentle motion avoids kernel damage
Energy efficient
High thermal efficiency, energy saving
VIII. Selection Points
- Capacity requirement: daily output determines single‑station / dual‑station, 80‑300 kg/h, optional
- Coating type: light coating choose rotary disc type, thick coating choose drum type
- Automation level: large‑scale, choose a fully automatic PLC model
- Cleaning convenience: easy‑to‑disassemble, easy‑to‑clean structure
- Supporting capability: match with dryer, elevator, etc.
- Material requirement: food-grade 304 stainless steel
IX. Development Trends
- Intelligent: PLC control + recipe storage + remote monitoring
- Multi‑functional: one machine for multiple nuts
- Energy saving & environmental protection: vacuum powder feeding, closed operation
- Continuous production: from batch to dual‑station, continuous development
Operation and maintenance tips: Daily cleaning of residual powder, check peristaltic pump tube wear, regularly lubricate transmission parts, and ensure electrical connections are secure. Operate strictly according to specifications to avoid contamination by foreign matter.
Conclusion
The cashew coating machine is the core equipment for producing flavored coated cashews. Choosing the right model and matching it with a reasonable drying system (especially the horizontal swing dryer) is key to ensuring product quality and improving production efficiency. It is hoped that this guide will assist you in equipment selection and process optimization.
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