A flexible screw conveyor is a mechanical conveyance system that moves solid bulk commodities like powder, pellets, and granulates across a facility. The mode of transit may be horizontal, inclined, or a combination of the two with some curves. Read More…
Flexible Screw ConveyorsFlexible screw conveyors are materials handling equipment that involve the use of a rotating screw within a tubular or polygonal conveyance channel. When a motor turns the screw, the material within the channel is forced upwards as the screw turns. The defining feature of flexible screw conveyors is their flexibility compared to rigid screw conveyors.
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VAC-U-MAX is a manufacturer specializing in screw conveyors and transportation systems, load filling machines, bulk bag loaders, grinders, pulverizers and sifters. The company serves the chemical, food and feedmill industries with highly efficient products.
Spiroflow Systems has more than 40 years of experience in the design, manufacture & installation of bulk material handling equipment & systems. Product innovation & a thorough understanding of customers’ needs & objectives keep Spiroflow at the forefront of the industry. Spiroflow Systems offers flexible screw, aero mechanical, pneumatic, tubular cable & chain drag conveyors as well as bulk...
At Appcon, we understand that conveying rate, angle, distance, material flow characteristics, and integration with upstream and downstream equipment are crucial factors in ensuring efficient and reliable material handling processes. That's why our screw conveyors and feeders are engineered and constructed to excel in these areas, guaranteeing optimal performance.
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The use of flexible screw conveyors is limited to short distances (5-10 m, sometimes up to 20 m). Features of flexible screw conveyors as compared with a regular screw conveyor include the following components:
Bearings / Seals
Inlet and outlet
The tube and screw flight designs have the most variances. The tube is made of plastic, often polyamide or special polyethylene, which makes it flexible in a way that permits the conveying path to be organized by the factory layout. The screw flight has no shaft and is constructed of steel; it can bend inside the tube. The drive is normally positioned at the screw's output, which keeps its seal and bearing away from the product.
Maximum sensor level
Hopper minimum level sensor
Bridge break unit
Electric anti-vibration dowels
Flexible conveyor tube
Flexible Screw Conveyor Design
The actual capacity of a flexible screw conveyor when designing is determined by:
Spiral rotational velocity and its model coefficient
Tilt and infeed type
Type of material being conveyed
The electric motor that drives the screw is called the drill, and the tubular casing is the only other significant part. A helicoid screw that revolves inside a stationary tube is part of the flexible screw conveyor. Screw conveyors can be utilized for horizontal transports of up to 80 feet and inclination motions of up to 60 degrees. Their diameter commonly ranges from 2.5 to 8 inches.
For example, a 45-degree angle, 360 RPM screw conveyor with an 8-inch diameter can move 1800 cubic feet per hour. The flexible screw is designed as a square bar, round, flat, and beveled edge shapes, and is manufactured from stainless steel. The product is forced through the tube as the screw revolves, producing directional force. It also generates centrifugal force, pushing the material against the tube wall.
There are numerous auger designs, and each one addresses the issues brought on by various material properties. An auger type that is most appropriate for the material that needs to be conveyed to achieve the greatest results from a flexible screw conveyor:
Made of rectangular or square wire, flat wire augers are used to move powders or other light materials. As a result, the outward force against the tube wall decreases, and a higher positive forward force is applied to the product transported by the flat conveying surface.
Beveled or Square Bar
This particular drill style is made to transport challenging-to-handle or delicate materials with little product degradation or damage. The beveled auger is placed straight. As a result, it works at a maximum RPM of 600 while maintaining a far lower maximum permissible RPM level.
These flexible screws are typically utilized with heavy or extremely abrasive materials. They are manufactured from a coiled round bar. The strength and flexibility of this auger design, which reduces the load imposed on it by particle form, material weight, or material size, are its greatest assets. The round wire auger design produces high slippage and higher outward forces on the transported product.
This tiny tube runs the entire length of the drill and is positioned in the screw's center. Limiting the amount of material that may enter the conveyor, the center core limits the pressure placed on the screw. When transporting fluid or highly aerated or dense materials, use a center core.
The flexible screw conveyor provides the best conveying option for the most diverse batch-processing applications. However, there are benefits and limitations to every type of bulk material handling conveyor that should be considered when choosing the right piece of machinery. Therefore, when choosing a flexible screw conveyor, the benefits and limitations are considered:
Advantages of Flexible Screw Conveyor
Provides alternatives for hoppers that guarantee a dust-tight system and that the product stays inside the process
Provides minimal to moderate material degradation
Transports numerous free-flowing and non-free-flowing bulk materials with ease
Suitable for both horizontal and vertical conveying
Limitations of Flexible Screw Conveyors
Residual product is left in the casing
Different screws are needed when using the same conveyor to move several products
Height and length are limited
Flexible screw conveyors also have limited capacities
Choosing the Proper Flexible Screw Conveyor Company
To make sure you have the most beneficial outcome when purchasing a flexible screw conveyor from a flexible screw conveyor manufacturer, it is important to compare at least 4 or 5 companies using our flexible screw conveyor directory. Each flexible screw conveyor company has a business profile page that highlights their areas of experience and capabilities and a contact form to directly communicate with the manufacturer for more information or request a quote. Review each flexible screw conveyor business website using our proprietary website previewer to get an idea of what each company specializes in, and then use our simple RFQ form to contact multiple flexible screw conveyor companies with the same quote.
Flexible Screw Conveyors Informational Video
Screw Conveyors Power Pages
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