Screw Conveyors for Material Handling

Screw conveyors are the simplest, most budget-friendly option for transferring materials at rates of up to 40 tons per hour over distances of up to 65 feet. Screw conveyors help move materials that are being transferred to bins or other material handling locations. A dual auger design can determine if the material will move left or right to accommodate your needs.

Screw conveyors are flexible and, depending on their diameter, can be curved to some extent. A special heat-treated, tempered carbon or stainless steel spiral rotates with an ultra-high-molecular-weight polyethylene (UHMWPE) food-grade tube. The transport of material occurs by the turning of a helix screw in a trough casing. The particles should be smaller than the screw pitch. The screws can have constant, variable, or tapered pitch. In tapered pitch, the distance between the grooves gradually decreases down the length of the conveyor.

 We can help your company use screw conveyors to meet your specific needs. For instance, small screws with round cross sections are resilient and strong in harsh conditions, while screws with flat cross-sections are more suited for high velocity applications. The trough casing can be round, rectangular, or U-shaped.

The picture below to the left shows a single helical screw conveyor, and the picture below to the right shows a dual auger design.

 

Application Examples

Screw conveyors are used in pharmaceutical, food and dairy production applications. To accommodate all these industries, our products have to be adaptable and easy to use. For reference, the screw conveyor below to the left is used in an asphalt plant, and the one to the right is used as a feed for a metal turnings shredder.

Advantages

  • Closed tube prevents product contamination
  • Inexpensive to purchase and operate
  • Quick installation
  • Flexible conveyors can be routed around obstacles
  • Product handled gently
  • Product is usually very accurate and highly repeatable batches are possible
  • Conveyor can be easily emptied at the end of a batch operation

Disadvantages

  • Particles must be smaller than the pitch
  • Abrasive materials will most likely cause wear
  • Small scale experiments needed to determine operating parameters
  • Need to run full of products

Are you ready to get started? We can help your organization or facility find the right screw conveyor for material handling, whether you need helical or dual auger design. Request a free quote from us today!