Selecting the appropriate flexible screw conveyor can be difficult, especially for those lacking experience with this type of conveyor. This guide will cover the fundamental mechanics of a flexible screw conveyor, the pros and cons of using flexible screws, and the necessary steps for accurately specifying a flexible screw. Additionally, it will explain how this knowledge translates to the actual hardware, ensuring a trouble-free installation.
What is a flexible screw conveyor & how does it work?
A flexible screw conveyor utilizes a helical-shaped auger inside a casing to move and elevate bulk material. This type of conveyor is commonly used for transferring powders and granular bulk materials to mixers, packaging machines, or storage bins. A standard flexible screw conveyor is composed of an inlet hopper, helical auger, conveyor casing, couplings, and a drive/discharge head. Due to the shaftless design of the auger and the use of Ultra High Molecular Weight Poly Ethylene (UHMW-PE) for the casing, these conveyors can be bent or curved around fixed objects or to change positions.
When considering a flexible screw conveyor, it is important to be aware of its advantages and limitations. This type of conveyor offers a relatively affordable option compared to traditional systems and its flexible casing allows for easy navigation around obstacles. Additionally, its design allows for quick cleaning and disassembly, making it a versatile choice for various industries such as food production.
With minimal moving parts, maintenance is also limited, and the conveyor’s length can easily be adjusted for repurposing. In terms of portability, a wheeled cart and simple power cord can make it easily transportable. Experience the convenience and versatility of the flexible screw conveyor. With affordable pricing, easy navigation, and quick cleaning capabilities, it’s the perfect solution for various industries, including food production. Plus, its minimal moving parts and adjustable length make it a low-maintenance and easily portable option.
Although they offer many features, flexible screw conveyors do have limitations and may not be suitable for all applications. It is crucial to understand these limitations in order to prevent misuse of the flexible screw. Some of the limitations include: Inability to convey all types of materials – Products with high moisture, density, large solid particles, and slurries may reduce the effectiveness of a flexible screw conveyor. Should not run dry – Extended periods of operation without material may cause excessive wear from the rotating auger coming into contact with the casing.
Incomplete emptying of casing – At the end of the cycle, the conveyor may not fully empty due to factors such as material characteristics, conveyor diameter, auger style, and overall layout. Cleaning may also be necessary when switching between incompatible products. Limited length – Unlike fixed screws where the auger is welded to a central shaft, flexible screws can stretch and are not recommended for lengths over 40 feet.
Flexible screw conveyors have limitations that should be taken into account when considering their use. Some of these limitations include reduced effectiveness when conveying high moisture, dense, large solid particles, and slurries, as well as potential excessive wear when running dry for extended periods. Additionally, the conveyor may not fully empty at the end of the cycle and may require cleaning when switching between incompatible products. Finally, flexible screw conveyors are not recommended for lengths over 40 feet due to stretching.
When selecting a flexible screw conveyor for a specific application, it is crucial to gather information on both the product being transported and the conveyor’s operational details. This will determine the appropriate design and components for the conveyor. The most important information needed when specifying a flexible screw conveyor is the physical properties of the material.
These properties can vary greatly, so it is important to consider the product density, average particle size, flowability, abrasiveness, and tendency to aerate and create dust. Choose the perfect flexible screw conveyor for any task. With careful consideration of the material’s physical properties, you’ll have a tailored design with the right components for efficient operation. Determine density, particle size, flowability, abrasiveness, and dust-producing abilities to make the most informed decisions.
Consider the physical properties of the material to be transported and then assess the operational needs. Determine the desired flow rate (lbs./hr or kg/hr), the required discharge height from the floor, and the typical layout with a 45-degree discharge angle. Are there any obstacles between the inlet hopper and the discharge point? Also, consider the frequency of operation, the availability of utilities and their specific power, compressed air, and controls necessary for starting and stopping the conveyor effectively.
When selecting a suitable conveyor system, it is important to evaluate factors such as material properties, required flow rate, discharge height, and potential obstacles to ensure efficient and effective operation. Additionally, the frequency of operation and availability of necessary utilities should also be taken into account. By considering these factors, you can find the best conveyor option for your specific needs.
What hardware is required based on the given application? For free-flowing goods, the basic setup of an inlet hopper, flat wire auger, casing, and discharge head are adequate. The conveyor size, typically with a range of 2-6 inches, will provide flow rates from 50 to 500 ft3/hour. To determine the appropriate conveyor size, the desired flow rate, product density, and conveyor length are taken into account.
The motor and gearbox for the discharge head are then sized according to the load. For more difficult applications where the product does not flow easily, modifications such as bridges or aeration may be necessary for the standard conveyor. Some common modifications and their respective challenges include auger selection, casing selection, center cores, hopper angles, and flow aides.
The product offers a wide range of flow rates, from 50 to 500 ft3/hour, with conveyor sizes between 2-6 inches. Based on your specific needs, the motor and gearbox are sized according to the load, to ensure optimal performance. For more complex applications, modifications such as bridges or aeration may be necessary. Our auger selection, casing selection, center cores, hopper angles, and flow aides offer solutions to any challenges you may encounter.