Powder Surface Coating Machine for Industrial-Scale Surface Modification

The Powder Surface Coating Machine, also known as a surface modifier or powder coating system, is a key innovation in the field of non-metallic mineral processing. It is designed to improve the interfacial properties between inorganic fillers and organic polymers by applying a uniform, reactive coating to fine mineral particles. This process enhances filler dispersion, strengthens the mechanical performance of final products, and reduces formulation costs.

Widely used in industries such as plastics, rubber, adhesives, coatings, and polymer-based composites, this machine delivers efficient, scalable, and precise powder modification for both fine and ultrafine mineral powders.

Applications of Powder Surface Coating Machine

Plastics, rubber, adhesives, coatings, composites, and other functional material manufacturing sectors.

Kaolin, talc, wollastonite, quartz powder, mica, silica, titanium dioxide, zinc oxide, aluminum oxide, magnesium hydroxide, barium sulfate, illite, pyrophyllite, tremolite, and more.

Inorganic mineral fillers often display poor compatibility with organic matrices, resulting in agglomeration and reduced mechanical properties. The Powder Surface Coating Machine solves this challenge by:

Enhancing the compatibility of inorganic fillers with polymers

Improving interfacial bonding

Increasing filler loading

Reducing binder usage and overall costs

Enabling materials to exhibit tailored physical and chemical functionalities

Working Principle of Powder Surface Coating Machine

Feeding & Preheating:
Dry mineral powder is fed into the machine via a twin-screw feeding system. During feeding, the powder is preheated using a built-in heating device to ensure low moisture content (<0.5%).

Modifier Dosing:
A solid or liquid surface modifier is melted in a controlled heating system and delivered via a metering pump to the atomization chamber.

Atomization & Mixing:
Inside the atomization chamber, specialized nozzles create a mist of both powder and modifier. The two are combined under high-speed airflow to ensure homogenous pre-mixing.

Modification & Coating:
The mixture then enters the main modification unit, composed of a high-speed rotating spindle, stirring rods, and impact hammers. The materials undergo friction, impact, and shearing, ensuring uniform coating of the powder surface.

Collection:
The modified powder is collected via a negative pressure dust collection system, ensuring minimal loss and a clean working environment.

Continuous Production, Large Throughput
Designed for continuous industrial-scale operations, adaptable to various production capacities.

High Coating Efficiency
Achieves high coating rates and activation indices with minimal modifier consumption.

Dual Functionality: Coating + Deagglomeration
Simultaneous modification and disintegration, ideal for both fine and ultrafine powders.

Maintains Original Particle Shape
High-speed gas-solid vortex mixing ensures minimal structural damage to the original powder.

Dust-Free Operation
Negative pressure system ensures no dust leakage, improving worker safety and environmental compliance.

Integrated Heating & Cooling
Simplifies operation by removing the need for separate systems.

Stable Modifier Dosing
Independent dosing systems for fluid and non-fluid modifiers guarantee continuous and uniform operation.

Structural Components
Hopper: Accepts raw material with moisture < 0.5%.

Feeding Device: Twin-screw system ensures stable feed rate.

Temperature-Controlled Dosing System: Ensures precise melting of solid modifiers and optimal delivery temperature.

Modification Unit: Three T-shaped modification cylinders offer high-efficiency coating in a compact design.

Dust Collection System: Cyclone separator and pulse dust collector ensure efficient powder recovery and clean operation.

Model	Main Motor Power	Fan Power	Spindle Speed (rpm)	Capacity (kg/h)
SLG-3/200	4 kW × 3	2.2 kW	6000	20–80
SLG-3/300	18.5 kW × 3	5.5 kW	4500	500–1500
SLG-3/600	37 kW × 3	22 kW	2700	3000–4500
SLG-3/900	75 kW × 3	45 kW	2000	5000–7000

Note: Specifications are subject to change without prior notice.

The SLG series Powder Surface Coating Machine is the result of cutting-edge engineering and extensive experience in powder modification technology. With its robust performance, high efficiency, and broad application range, it is the ideal solution for companies seeking to optimize material performance and reduce formulation costs in competitive markets.

👉 Contact us today for more information, custom solutions, or a demo tailored to your material needs.