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Polymer rollers

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Disc roller or back roller

Disc rollers support the under or return belts and apply a lower band of conveyor belt underneath and remove continuous material from it. The return roller is made of a coated steel tube in which rubber or polyurethane rings are mounted.


One of the main parts used in conveyor belts are rollers. These parts play a very important role in industry and material transfer. In fact, rollers are moving rollers that transfer items through a conveyor belt or a conveyor system. Since this part has different uses, therefore, different types of it have been designed and made, each of which performs a specific task. Among these types, we can mention the return roller or disc roller, which we will learn more about later.

What is a return roll or disc roll and what is its function?

Before entering the main discussion, it is better to get acquainted with the conveyor belt and the duties of the roller in it. Because this issue can play a very important role in understanding the task of the back roll or disc roll. In various industries, a device called a conveyor belt is used to transfer materials and products from one point to another. In fact, the conveyor belt is a moving plate made of metal or rubber that is moved by a motor and gearbox. If we want to give a clear example of a conveyor belt, we can mention an escalator.

Now, in order for objects to move easily on this belt, they have used a piece called a roller, and in fact, without a roller, there would be no conveyor belt. It is better to know that different types of rollers are used in a conveyor, each of which has a special task. Some of these roles are:

Rolled roller: This type is used to bear the weight of the belt.
Impact roller: This roller is used to keep the tape stable and prevent it from being damaged.
Return roller or disk roller: This roller is installed on the lower surface of the conveyor belt and is used to bear the weight of the belt during return.

Apart from these three cases, there are other types of rollers that are the most efficient.

The function of the return roller or disc roller is to return the belt to the starting point, and therefore it is installed under the conveyor frame and helps the belt to go back. In the design and manufacture of the return roller, plastic rings are used so that the amount of wear reaches its minimum value. Because there are very small particles on the conveyor belt that can increase wear and friction. When they use plastic, this abrasion is reduced. Also, the material of the return roller should be such that it can withstand high pressures. For this reason, the material of the body of this roller is made of strong metal.

Examining the importance and application of the return roller or disc roller

As we mentioned above, the return roller or disc roller has a very important role in the conveyor belt and if this roller is damaged for any reason, a lot of pressure is applied to the conveyor and as a result, the belt may be damaged very soon. . In fact, in addition to helping the movement, the back roller also plays a very effective role in bearing weight.

The use of return roller or disc roller is used in various industries. For example, it is used in airports to carry luggage. In order to be able to withstand the weight of these loads, the roller must be made of good material and well sealed. If this roller does not have a standard design, it will have a very short useful life and as a result, you will have to pay for it again.

Quality control tests of return roll or disk roll

Since the damage of the return roller can cause the complete stop of the conveyor belt, it is better to perform various tests and quality control on it to find out whether it meets the required standards or not. Among the tests that are performed in Asarol on the return roller, the following can be mentioned.

Sealing test: The return roller is always exposed to dust and pollution. If these materials can penetrate into the roller, its parts will wear out and break down very quickly. Therefore, this part should have good resistance against suspended dust particles. For the sealing test, the roller is first weighed and then placed in water. If its weight does not change after 2 hours, it means that the roll has successfully passed the test. Of course, there is no problem with a weight difference of less than 10 grams.
Balance test: Another test that is performed on the return roller or disc roller is the balance test. This test is performed based on the ISO 1940/01 standard and the roller must be able to be balanced and aligned.
Welding health test: The different parts of the return roller are connected by welding. If the welding is not done well for any reason, the parts will separate and the system will fail.
Types of return roller or disc roller

The return roller or disc roller is usually designed and made in two horizontal and V ways, and the V type is very suitable for bearing heavy loads. Of course, sometimes you may have to order a return roller or a unique disc roller due to the needs of the project. The reason for this can be due to different climatic conditions or high load.

The price of a return roll or disc roll

The size and material used in the roller are among the influential factors in determining its price. That is why the sellers announce different prices for this piece. But in addition to these two

HDPE & PU polymer roller

Today, in the industry of transporting materials and large conveyors, several categories are considered, including energy saving, minimal noise emission, weight reduction of parts, and finally easier installation of parts. With this piece, all cases will be covered.

One of the tools that is widely used in the world of industry and technology is the conveyor belt. In fact, a conveyor belt is an industrial belt that is used to transport and move various parts and materials. Due to its many applications, this tool has different types such as loading conveyors, stud conveyors, rotation conveyors and belt conveyors, which are used in industries such as mines, petrochemical industries, steel, etc. Rollers are also used as weeds in this system. When the conveyor is turned on, the rollers also move and help carry the load. One of these rollers, which has a lot of uses, is the polymer roller, which we will learn more about in the following.

What is a polymer roller and what is its function?

Since the introduction of conveyor belts, rollers have also been used. In the past, steel rollers played a very important role and have been able to carry large amounts of load until now. But one of the defects of steel rollers was that they did not last well in different weather and climate conditions, and they soon suffered from corrosion and decay. Also, this model of the roller easily rang and caused the device to jam. This problem was very common in the production and transportation lines of salt, sulfur, steel and cement, and it caused a lot of expenses for its owners.

To solve this problem, scientists made another type of roller, called the polymer roller (Roller King), which did not have the problems of the metal roller. These rollers are made of high density polyethylene and have anti-alkali, anti-shock and anti-acid performance. Also, the surface of this model is not rusted and can be used in different climatic conditions.

The main task of the rollers is to bear the load and carry them along the transfer path. Rollers are made in different sizes and diameters, each of which has its own function. In fact, it can be said that the conveyor system has no use without rollers. These parts have different types, we will get to know some of them below.

Rollick is back
Rollick went
Percy Rollick
Replacement roller
Guide roll
Impact roller
Guide roll
Polymer roller
Examining the importance and application of polymer roller

The weight of the polymer roller is almost 50% less than the metal roller, and this characteristic makes the energy consumption at the start and end of the conveyor low. As a result, the electricity consumption of the factory is greatly reduced. Also, the installation and maintenance of the polymer roller is easier than other types of rollers, and damage to people and devices is prevented. Especially when we want to install the roller in very long conveyors.

Another characteristic of the polymer roller is its easy and convenient carrying. In addition, the level of wear and corrosion is very low in this roller, and as a result, it will have a longer useful life. In general, using a polymer roller allows us to save a lot of money.

The polymer roller is also known as the King Roller because of its many advantages and uses. This roller does not react with chemical agents and does not rust. It is also very noisy. On the other hand, due to having a smooth and clean surface, materials and other contaminations do not accumulate on it and do not cause the conveyor belt to deviate from its original path.

In general, the application of the polymer roller can be summarized in the following cases.

Very high compatibility with the conveyor belt and no damage to it
Not having the property of creating static electricity
High resistance in environments with high humidity
Increase security
Low friction coefficient
Good resistance in environments with unfavorable conditions and high degree of pollution
Reduce electricity consumption
Having a weight 50% lighter than a metal roller
Excellent wear resistance
sound reduction
Resistant to chemical agents
Reasonable and economical price compared to metal rollers

Due to these features, there are many applications of polymer rollers, among which the following industries can be mentioned.

Sand mines
steel Industries
Recycling industries
Coal mines
Copper mines
Contaminated environments
Types of polymer rollers

Polymer refers to the material of the body of the roller and therefore this roller can be used as a forward, guide or simple return roller. The roller is responsible for bearing the weight of the belt when carrying the load and is installed on the side surface of the conveyor belt. The guide roller is also placed next to the conveyor belt and is in charge of guiding it. The return roller also bears the weight of the belt when returning.

All the tests that are performed for rollers, such as balance, friction, sealing, etc., can also be performed for polymer rollers. Polymer rollers that are more than 600 mm long use a metal sheath inside the tube to increase the strength of the roller and its resistance.

The price of a polymer roller

There are many factors that play a role in determining the price of a polymer roller, and therefore it is not possible to provide an exact number. Among these factors, we can mention the size, diameter and material used in the roller. Therefore, to know the exact price of the polymer roller, you must first determine the diameter, size and material you want, and then ask one of the reliable sellers for its price. The thing about the polymer roller is this