Industrial Powder Screw Conveyor
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This stainless steel screw conveyor, also known as an auger conveyor or spiral feeder, is specifically designed for the enclosed conveying of powders, granules, and small bulk materials. Featuring a fully sealed tubular structure, it effectively prevents dust leakage and material contamination during transfer. The integrated agitator-assisted hopper ensures stable material feeding and minimizes bridging. Widely used in powder processing and automated packaging lines, this conveyor provides continuous, efficient, and hygienic material handling for food, chemical, agricultural, and industrial applications.
Machine Overview and Functional Description
The stainless steel screw conveyor (auger feeder conveyor) is a highly efficient material handling solution engineered for the continuous and dust-free transportation of powders, granules, and semi-free-flowing bulk materials. Commonly integrated into mixing, packaging, and automated production lines, the system provides reliable and hygienic material transfer while minimizing labor requirements.
The conveying mechanism operates through the rotation of a continuous helical auger flight, which steadily pushes material through the enclosed tubular body. Compared with open conveying systems, the fully sealed design prevents dust dispersion, reduces material loss, and improves workplace cleanliness, making it particularly suitable for fine powders.
Its stable conveying performance ensures continuous feeding at a controlled speed, helping maintain production consistency and improve downstream equipment efficiency. The conveyor can be installed at different incline angles to meet varying plant layouts and material transfer heights.
To improve material flowability, the hopper is equipped with a vibration-assisted feeding device, preventing powder bridging and material blockage, especially when handling fine or cohesive products. The one-piece spiral auger design without welded seams minimizes material accumulation and reduces dead corners, supporting faster cleaning and improved sanitation.
The bottom section features a quick-discharge outlet, enabling convenient cleaning and residue removal during product changeovers. The discharge outlet can also be connected to dust-proof cloth sleeves or flexible connectors, ensuring fully enclosed transfer into mixers, silos, or packaging machines.
Constructed from food-grade SUS304 stainless steel, the conveyor offers excellent corrosion resistance, durability, and easy maintenance, making it ideal for demanding industrial environments.
Application Areas and Suitable Materials
Food Industry:Milk powder, flour, starch, cocoa powder, sugar, salt, coffee powder, seasoning powder, protein powder, wheat, soybean, grains, additives,etc
Chemical Industry:Fertilizer raw materials, urea, phosphate fertilizer, potassium fertilizer, detergent powder, catalysts, pigments, dyes, plastic pellets, resin particles,etc
Agricultural Industry:Seeds, feed additives, veterinary powder premixes, agricultural chemicals, granular fertilizers,etc
Pharmaceutical & Nutraceutical Industry:Herbal powders, nutritional supplements, pharmaceutical powders, additives, health ingredients,etc
Other Industrial Materials:Activated carbon powder, metal powder, ceramic particles, mineral powders, plastic compounds,etc
Technical Specifications
| Screw Conveyors | |||||||
|---|---|---|---|---|---|---|---|
| Lifting height (m) | 1.68 | 2 | 2.5 | 3 | |||
| Round tube diameter (mm) | 114 | 114 | 114 | 133 | |||
| 133 | 133 | 133 | 159 | ||||
| 159 | 159 | 159 | / | ||||
| Spiral tube length (m) | 2.3 | 2.8 | 3.5 | 4.2 | |||
| 2.3 | 2.8 | 3.5 | 4.2 | ||||
| 2.3 | 2.8 | 3.5 | 4.2 | ||||
| Motor power (KW) | 1.1 | 1.1 | 1.5 | 4 | |||
| 1.5 | 3 | 3 | 5.5 | ||||
| 3 | 4 | 4 | / | ||||
| Feed hopper size (mm) | 800*800 | 800*800 | 800*800 | 800*800 | |||
| Transmission mode | 900 | 900 | 900 | 900 | |||
Structural Design and Working Principle
1. Vibration-Assisted Hopper Feeding System
The hopper is equipped with an industrial vibration motor to improve material flowability. It effectively prevents powder bridging, material arching, and feeding interruptions, ensuring stable and continuous product transfer into the auger system.
2. Bottom Discharge Outlet
A quick-clean discharge outlet is integrated at the lower section of the screw conveyor, allowing convenient material emptying and residue removal. This design simplifies cleaning procedures and minimizes cross-contamination during product changeovers.
3. Seamless Spiral Auger Flight
The conveyor adopts a continuous helical screw flight design, where the auger is formed continuously along the shaft without excessive welding joints. This minimizes material accumulation, reduces dead zones, and improves conveying efficiency and sanitation.
4. Sealed Discharge Port
The upper discharge outlet supports flexible bag or sleeve connection, enabling fully enclosed material transfer into mixers, silos, or packaging equipment. This effectively prevents dust leakage and maintains a cleaner production environment.
FAQs
Q1: What materials can this screw conveyor handle?
This screw conveyor is suitable for powders, granules, and small bulk materials, including flour, milk powder, fertilizer, plastic pellets, seasoning powder, starch, feed additives, and chemical raw materials.
Q2: Why is a screw conveyor suitable for powder conveying?
The fully enclosed tubular structure prevents dust escape during operation, reducing contamination and maintaining a cleaner production environment—especially important when handling fine powders.
Q3: Can the conveyor angle and size be customized?
Yes. The conveyor length, tube diameter, hopper size, discharge height, and inclination angle can all be customized based on plant layout, conveying distance, and production requirements.
Q4: How does the hopper vibrator improve feeding?
The vibration-assisted hopper prevents powder bridging and material compaction inside the hopper, ensuring continuous and stable feeding while reducing blockage risks.
Q5: Can this screw conveyor be connected to other machines?
Absolutely. The screw conveyor is widely used with mixers, ribbon blenders, packaging machines, silos, crushers, and automated production lines, enabling seamless and fully enclosed material transfer.
Compliance and Certification Standards
At HONGDI Machine, we prioritize operational safety, electrical stability, and rigorous hygiene across all our custom industrial machinery. As a verified SGS-audited manufacturer, our equipment undergoes strict testing to meet and exceed global manufacturing regulations.
As demonstrated in the certification documents, our core product categories hold official CE Certifications, fully complying with the strict European Machinery Directives and Electromagnetic Compatibility (EMC) standards.
Key safety and quality guarantees include:
Certified Safe Operation: Advanced electrical and mechanical engineering that protects your facility’s personnel and ensures uninterrupted daily workflows.
Sanitary Stainless Steel Construction: Premium food-grade stainless steel contact parts designed for simplified washdowns, preventing cross-contamination and meeting strict food safety compliances.
Global Export Readiness: Dependable, customized equipment built to perform seamlessly in diverse international manufacturing environments.
Whether you are integrating a complete automated production line or a standalone unit, our CE-certified systems guarantee stable, continuous operation while protecting your product’s integrity.
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