Screw conveyor is a partner in modern material handling

Machines are designed to save human time and energy. A conveyor is a complex pick-up system that can move bulk material from the starting point to the specified endpoint. By making the transport workflow more efficient, it frees up human capacity that can be channeled into other activities. How does the screw conveyor work? What types are there? How is it manufactured? We have summarised the most important facts in this article!

What is a screw conveyor and how does it work?

A screw conveyor is designed to make material handling more efficient. But how does it do that?

A conveyor screw performs the task of transport, which is attached to the tube shaft using a screw thread. The whole system is driven by an engine, and the material travels through a tube. It can be operated horizontally or on a slope and can be used not only for transport but also for mixing and pressing.

The coefficient of friction between the conveyor or trough and the material being conveyed must be greater than that between the conveyor and the material. This is what allows the necessary movement to take place.

The screw conveyor is used in a variety of sectors. Typical applications include agriculture (combine harvester augers, auger conveyors, etc.), but they are also used in the construction, chemical, and pharmaceutical industries.

Types of screw conveyor 

The design of a conveyor system depends on exactly what material needs to be moved and exactly what the task is. For example, if medium-sized material needs to be moved, a screw conveyor with a screwed surface may be a good choice, but if the material is large, you may need shovels to move it.

The shape of the discharge opening will also be influenced by the material. For this reason, accessories such as a thread puller head or a cutting knife can be mounted on the discharge opening.

From a manufacturing point of view, three main categories of screw conveyors can be distinguished, which are used for different purposes and in different situations:

  • Segmented screw conveyor, characterised by high material thickness and high load capacity.
  • Pulled screw conveyors that are used mainly in the agricultural sector.
  • Wound screw conveyor, which have a small diameter.

What are the elements?

The design of a screw conveyor system is complex. It has two end plates: the drive side and the free-running side. Both are connected to a bearing and a seal, but the former can also be complemented by an indirect or direct drive.

In addition, the system also includes the suspension bearing, the rotor, the trough element, and the hopper, and can also accommodate various sensors.

The main requirements for the screw conveyor are

To ensure proper performance, each conveyor must meet the following three basic requirements:

  • Quality: quality is of paramount importance, both in terms of the use of materials and the manufacturing process.
  • High load capacity: the conveyor must be able to withstand the specified load, even when handling large quantities of material.
  • Accuracy: accuracy ensures that the conveyor can perform its task in a system.
  • ATEX certification: ATEX is an abbreviation for an EU directive that applies to equipment and protection zones used in potentially explosive atmospheres. It divides the work area into zones according to the degree of explosion risk and allows for the placement of different types of equipment. Conveyor belt equipment must comply with these requirements.

The production process

The production process is a long process, which always starts with defining the objectives: what exactly do we want to deliver, and in what quantities? Once you have all the information you need to determine what system you need, the manufacturing process itself can begin!

The manufacturing company will ensure that the best quality raw materials are processed, to the highest possible standard. They do this using top-of-the-range machinery and the right level of expertise.

Maintenance of the system

Quality production is the basis for a long-term system, but the importance of maintenance should not be overlooked. Bearing lubrication, for example, can contribute to smooth operation. By applying lubrication procedures, friction between surfaces can be reduced, thus preventing wear. Parts do not touch each other, so they do not get hot, and the noise of the operation is reduced.

The importance of bearing lubrication cannot be disputed. However, instead of traditional manual lubrication, automatic bearing lubrication may be a worthwhile option. This is a much more accurate, cost-effective, uniform, and environmentally friendly solution.

Makrofilt produces fully customised, individual conveyor pulleys. We use acid-resistant, corrosion-resistant, alkali-resistant, and carbon steel materials to produce conveyor pulleys with the right thread pitch, diameter, drive, and coupling to meet your requirements.

We supply customised solutions! Contact us, tell us your requirements and we will help you bring your dream system to life!

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Screw conveyor production: from the plate to the conveyor

The conveyor manufacturing process is carried out in modern conditions, and the most important thing is always precision and quality. In this blog post, we look at how screw conveyors are made and what you need to know about the process.

The task of the various auger systems is to transport the bulk material from one point to another using the auger system. These conveyor pulleys can significantly increase the efficiency of the workflow and "work off" many man-hours from human resources, who can then perform other activities.
The auger shaft, which follows the line of the screw, is responsible for moving the material towards the discharge opening along the path of the screw trough or auger tube. This can occur both horizontally and deviatorily downslope.

What do screw conveyors need to do?

Conveyor pulleys must meet a number of requirements in order to play their full role in the workflow. The main three basic requirements are: precision, quality and high load capacity.

Accuracy
The basic requirement for auger systems is that they operate accurately and fit perfectly into the process.

Quality
For the system as a whole, for both the raw materials and the production work, quality is the most important aspect and must be kept in mind at all times.

High load capacity
Conveyor pulleys are expected to withstand the load. Heavy-duty systems are capable of handling an incredible amount of material.

Production process and types

In all cases, conveyor manufacturing starts with the selection of the best quality raw materials by the manufacturing company, which is essential because the system needs to handle a large amount of material, which is not possible with conveyor pulleys made from poor quality raw materials.

Once you have the raw material, you can start machining it, making the pipe system. In the process, simple metal sheets are transformed into pulley plates. The manufacturing process needs modern tools to ensure the required precision.

The production of pulleys and conveyor pulleys depends largely on the application, size and surface. They are based on:

  • thick and heavy-duty segmental conveyor pulleys,
  • pulleys used in agriculture,
  • small diameter wound conveyor pulleys.

The biggest customers for conveyor pulleys

The greatest demand for conveyor pulleys is in agriculture. It is mainly the production of agricultural machinery parts, such as combine harvester augers or even augers for crop loading. In addition to agriculture, there are other important sectors which are also buyers of conveyor pulleys, such as the pharmaceutical, petrochemical, chemical and construction industries.

Macrofilt: screw conveyors on request

Makrofilt produces customized conveyor pulleys for customers. High quality materials, not only carbon steel, but also acid-resistant, corrosion-resistant, alkali-resistant materials are used to manufacture pulley systems. All of them have individual thread heights and diameters, with couplings and drives defined according to the requirements.

Get in touch with our colleagues who will show you the ordering and production process!

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Screw conveyor: efficient material handling

The easiest and quickest way to transport bulk material is with a screw conveyor. These conveyor systems are suitable for the efficient transport of both dry materials and liquids, making them an important part of some industrial and manufacturing processes. We've put together a summary of what a screw conveyor is, what it's made of and why it's indispensable in certain sectors.

What is a screw conveyor and what is it used for?

Whether in agriculture or in the construction industry, the screw conveyor helps to speed up work in all situations and conditions. In the case of a conveyor system, the conveyor is transported by a pulley shaft which is welded to the pipe shaft in a screw-type arrangement. The materials are moved in a closed, lidded tube or trough running along a screw shaft, and driven by a motor.
According to the operating principle, the most important thing for the process is that the coefficient of friction between the trough or the screw tube and the material surfaces is greater than the coefficient of friction between the material and the screw shaft. However, the principle of operation of the auger is not limited to its transport function, it can also perform mixing and pressing tasks.

Different versions of the auger can be used in different situations, for example, there is a belt auger, a plate auger and a paddle auger. There is also a variety of solutions in terms of layout. If the objects or materials to be transported are not very large, a pulley with a screwed surface can be used, while if the material to be transported is larger, it is more practical to change the position of the material by moving the blades.

The pulleys themselves and the pulley shaft vary according to what exactly the task is, what material needs to be transported. Likewise, the discharge chute can be fitted with additional parts, such as a thread puller head or a cutter blade. The auger can be used horizontally, but it can also be used on slopes.

What are the parts?

The construction of the conveyor is complex, the desired movement is the result of the interplay of several elements. One of its two end plates is the drive side, to which the bearing, the mass cup and the drive are connected (this can be indirect or direct), and the other is the free-running side, to which the bearing and the mass cup are connected.

The conveyor system also includes the rotor, the suspension bearing, which varies depending on the length, the hopper, the trough element and optionally sensors.

Makrofilt: the master of screw conveyor manufacturing

Makrofilt specialises in the manufacture of custom filter presses and screw conveyors. Fully customised screw conveyors are made by the company, using high quality materials and manufactured by highly qualified technicians. Our reliable and customised systems are delivered turnkey, so that the customer has nothing to do other than to outline the requirements and then to operate them.

Curious about our work? Contact our colleagues!

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Automatic bearing lubrication: a bastion of maintenance

Automatic bearing lubrication can save you a lot of time and money, not to mention the problems you can prevent. In today's post, we're going to talk about the importance of bearing lubrication and look at when manual and automatic bearing lubrication is preferable!

You can't do without maintenance

Greasing and oiling is a crucially important maintenance operation. One in two machine and equipment failures is caused by maintenance and operational deficiencies, which then cost the company a significant amount of money to repair. But with the right attention, these problems can be avoided.
By using different lubrication techniques, friction between surfaces can be reduced, thus preventing major wear. Automatic lubrication allows water and dirt to be kept out, which is of great importance in terms of preserving the condition of the surface. The reduced friction of the surfaces means that components will not heat up as much and noise during operation will be reduced.

Basic principles of bearing lubrication

However, the way and manner in which bearings are lubricated is not always the same. There are certain principles that should be kept in mind during the operation. Let's see what they are!

Accuracy
It is essential that the amount of lubricant used during lubrication is exactly the amount needed. Any more and you will end up with a surplus, and any less and the lubrication will be worthless and the desired results will not be met.

Regularity
It is not enough to lubricate a bearing once. Like all maintenance work, it should be done from time to time. Ideally, it should be done regularly, before it is too late and the parts become damaged.

Thoroughness
Completeness and thoroughness is an essential principle. We cannot complete the procedure by refilling a few lubrication points, this must be done at each one for a good result.

Even in extreme conditions
There may be extreme circumstances when a careless machine operator might think that bearing lubrication is not worth the trouble. However, this is not the right approach, as lubrication must be carried out even in extreme conditions.

Manual and automatic bearing lubrication

Bearing lubrication can be done in two ways, manual and automatic. Let's see what you need to know about them!

Manual bearing lubrication
Manual lubrication can be carried out on a stationary machine. In these cases, the bearings are not moving, so the lubricant cannot get into the friction surfaces. Therefore, when the machine is started, the surfaces are still running dry at the beginning. Manual lubrication is done with grease, which wears out over time and can introduce contaminants that can damage the bearing. With manual lubrication, dosing is a big problem. Overfilling or even missing a lubrication cycle or a lubrication point often occurs.

Automatic bearing lubrication
Automatic lubrication is also possible on a machine that works in the opposite way to a manual lubricator, so the lubricant can immediately get into the friction surfaces and "do its job" by movement. In this case, the lubricant is dispensed in dense cycles and is constantly replenished in small quantities, which helps to keep contaminants out and ensures that the lubricant is always fresh.

The automatic bearing lubrication ensures uniform lubrication, which happens automatically after set-up. An environmentally friendly solution that is also cost-effective, as it uses only the lubricant that is actually needed.

How long a piece of equipment has to stand still is important for the operation of the machines, because saving time also saves money. With automatic lubrication, downtime for maintenance can be significantly reduced and the time that the machine can be used can be increased.

Automatic lubrication is a much more efficient solution than manual lubrication, saving more than a quarter of maintenance and operating costs. Make your choice for cost savings and contact the Makrofilt team who will help you put it into practice!

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