Conveyor screws Manufacturers online

Conveyor screws are the central component of screw conveyors used to transport bulk and granular materials in many industries.

These systems use the principle of the rotating screw to move material efficiently and continuously. Screw conveyors are used in numerous applications, from agriculture to heavy industry.

Here is a brief overview of how conveyor screws work, the materials and thoughts on screw geometry and rotational speed, further detailing their use in screw conveyors:

How it works:

The rotating conveyor screw pushes the material by friction along a closed tube or open trough.
Conveyor screws can be operated horizontally, vertically or inclined to move material over different distances and heights.

Materials for conveyor screws:

• For abrasive materials such as sand, gravel or cement, the conveyor screws should be made of wear-resistant material. Hardened steel or bimetallic coatings are often used here, which significantly extend the service life of the screw.
• In environments that convey chemically aggressive or moist materials, stainless steel or special corrosion-resistant coatings are required to protect the screw from damage.
• In the food and pharmaceutical industries, the material of the screw must be food-compliant; stainless steel is generally used here, which is easy to clean and meets hygiene requirements.

Screw geometry and rotational speed:

• The screw profile (the shape and pitch of the turns) should be matched to the material and the conveying process. Materials with different flow properties, such as powders, granulates or sewage sludge, require adapted screw shapes.
• The speed of the screw influences the conveying speed and the conveying capacity. Too high a speed can damage the material, too low a speed can lead to blockages. The speed must be adjusted according to the material properties and the area of application.

Use of conveyor screws in screw conveyors:

1. Transportation of bulk materials:
Conveyor screws are used to transport bulk materials such as grain, flour, cement, coal or plastic granules. They can efficiently transport the material in small or large quantities over short to medium distances.

2. Dosing and control:
In addition to transportation, conveyor screws can also be used for dosing materials. This is particularly important in the chemical and food industries, where precise quantities of material need to be conveyed or mixed.

3. Conveying under special conditions:
Conveyor screws are used in environments where other conveying methods, such as belt conveyors, do not work efficiently. They are ideal for use in confined spaces, under high temperatures or in dusty or potentially explosive environments.

Conveyor screws are the key components of screw conveyors used for the efficient and continuous transportation of bulk materials in various industries. Their robustness, flexibility and ability to adapt to different conveying conditions make them a popular choice in many applications.

Here is an overview of the most important points to consider when buying conveyor screws:

When purchasing conveyor screws as part of screw conveyor systems, there are several crucial factors that should be considered to ensure optimal performance and longevity:

• For abrasive materials, screws should be made of hardened steel or special alloys.
• In humid or chemically aggressive environments, stainless materials (e.g. stainless steel) are important.
• The dimensions of the screw must be matched to the material to be conveyed and the required conveying capacity.
• The screw profile should be adapted depending on the type of material (powdery, granular or fibrous).
• The conveying capacity should meet the requirements of the process (e.g. kg/h or m³/h).
• Take the length and inclination of the conveyor screws into account, as these influence the energy requirement and efficiency.
• The drive motor must be powerful enough to cope with the required conveying capacity, especially with heavier materials.
• Variable speed control enables adaptation to different material quantities and processes.
• The screw should be easy to clean and maintain to minimize downtime.
• Wear-prone parts should be easy to replace to extend the life of the screw.
• In certain applications (e.g. with explosive materials), safety standards must be adhered to.
• Consider both the purchase cost and the long-term operating costs, including maintenance and energy consumption.

When purchasing conveyor screws for use in screw conveyors, it is important to consider the material, screw geometry, conveying capacity, drive system and ease of maintenance. Careful selection contributes to the efficiency, safety and longevity of the conveying process.

Conveyor screws can be purchased from various suppliers. Comprehensive information about manufacturers and suppliers of Conveyor screws from all over the world can be found on Exportpages.