The Wrights Dowson group supplies high-quality bulk handling equipment to a wide range of industries across the UK. Metering Screw feeders are part of their product offering alongside screw conveyors and other equipment.

What Is a Screw Feeder Used For?

Metering Screw feeders enable you to control the flow of powders or materials as they enter into another part of the production. This is especially relevant in any application where the dry cloth has to be fed into the water to create a paste of a specific ration. One example is concrete production.

The screw feeders are designed to metre all types of materials at constant volumes and to high accuracy. They dispense materials from hoppers, containers or silos at a controlled rate.

This is achieved via two different methods:

Volumetric Screw Feeders

Volumetric screw feeders are designed to metre powder at specific speeds and dispatch a particular quantity at each interval. In addition, many screw feeders allow for control over the rate to control the material flow.

Volumetric feeders always consist of a hopper in which the material rests, a discharge device, and a controller.

Gravimetric Screw Feeders

A gravimetric feeder, in comparison, is a loss-in-weight feeder. It calibrates itself based on weight. The feeder automatically measures the material’s weight to achieve and maintain a consistent feed rate.

Controlling the speed at which the screw agitates the powder is also vital. Different powders have an ideal speed range that will ensure it is not adversely affected by changing direction and filling the screw pitches.

Advantages of Metering Screw Feeders

Wrights Dowson’s metering screw feeders come with a range of advantageous features.

  • They have only two moving parts: The drive and the screw. This ensures that they enjoy a long-lasting performance with minimal downtime.
  • An O-Ring sealed inline drive ensures dust-free operation. It also makes the screw shaft easy to realign after change or cleaning.
  • A unique agitator/conditioner screw can be installed to fill the feed screw for higher accuracy.
  • Available in a wide range of models, Wrights Dowson’s screw feeders include space-saving models of a smaller build. They can also be fully sanitary for the chemical and food industries or combined with feeder and conveyor units.

Each application is different. That’s why our engineers at the Wrights Dowson group work closely with customers to design equipment specific to their needs. We use 3D imaging software and CAD design tools to create detailed designs. Get in touch today for technical help, or ask our team any questions you might have.