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How to Build a Screw Conveyor?

2025-09-29

A Screw Conveyor is one of the most reliable and efficient methods for transporting bulk materials in industries such as plastics, chemicals, food, and recycling. Building a screw conveyor requires not only technical knowledge but also the use of high-quality components and precise engineering. At HONGQI, we bring over 20 years of expertise in designing and manufacturing pelletizing and recycling equipment, including advanced screw conveyors tailored to different production needs.

Understanding the Basics of Screw Conveyors

A screw conveyor consists of a helical screw blade, also known as a flighting, mounted inside a tube or trough. When the motor drives the screw, materials move forward along the conveyor path. This simple but highly effective design makes it ideal for consistent feeding, mixing, or transporting of powders, granules, and small pellets.

Our screw conveyors are widely applied in plastic pelletizing lines, recycling systems, and compounding processes, ensuring stable output and reduced material loss.

Key Steps to Build a Screw Conveyor

1. Determine Capacity and Application

Before construction, you must identify the required throughput. For example, our models range from 800 KG/HR to 2000 KG/HR, making them suitable for both medium and large-scale production lines. Applications may include feeding extruders, transferring recycled plastic granules, or loading modifiers into mixers.

2. Select Tube Size and Screw Blades

Tube diameter and blade design are critical. At HONGQI, we provide:

  • HQ-141 with Φ141 mm tube and 3 blades for 800 KG/HR output.

  • HQ-159 with Φ159 mm tube and 3 blades for 1500 KG/HR output.

  • HQ-219 with Φ219 mm tube and 4 blades for 2000 KG/HR output.

These options ensure accurate handling of different materials with minimal blockage.

3. Choose Motor Power

Efficient drive systems guarantee stable operation. Our screw conveyors use high-performance motors:

  • 2.2 kW with 4 poles for HQ-141.

  • 3 kW with 4 poles for HQ-159.

  • 4 kW with 4 poles for HQ-219.

These motors provide strong torque and reliable long-term performance.

4. Build Frame and Support Structure

The frame must be durable to handle continuous load. We use stainless steel and precision welding to guarantee strength, easy cleaning, and resistance to wear. The stable frame design also makes installation simple and ensures long service life.

5. Install Feeding and Discharge Systems

The screw conveyor should include a feeding hopper and outlet designed for seamless integration into the production line. Our designs allow quick connection to pelletizers, mixers, or washing machines, improving workflow efficiency.

6. Ensure Safety and Accuracy

At HONGQI, advanced CNC machining ensures every part is manufactured to tight tolerances. This guarantees smooth rotation, reduced vibration, and enhanced operator safety.

Why Choose HONGQI Screw Conveyors

  • Proven Expertise: Over two decades of industry experience with global customers.

  • High Efficiency: Capacities up to 2000 KG/HR for continuous production.

  • Durability: Stainless steel construction and advanced machining for long life.

  • Integration Ready: Compatible with pelletizing machines, dewatering units, and washing systems.

  • Global Service: Full after-sales support with fast response to customer needs.

Applications in Plastic Industry

Our screw conveyors are widely used in:

  • Pelletizing lines for transporting plastic pellets from extruders.

  • Recycling plants for feeding washed flakes into granulators.

  • Modifier blending for handling engineering plastics and polymer compounds.

  • Commercial plastic production requiring stable and continuous material transfer.

Conclusion

Building a screw conveyor involves careful planning of capacity, tube design, motor power, and structural support. With HONGQI’s advanced technology and high-quality products, customers can rely on efficient, durable, and safe screw conveyors tailored for their operations. Whether for engineering plastics, recycled materials, or specialty polymers, our equipment ensures consistent performance and outstanding results.

For more information on our complete solutions in pelletizing and plastic recycling, explore our full product line and discover why HONGQI is trusted by customers worldwide.

Screw Conveyor

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