The advantages of mechanical fasteners for a conveyor belt were highly evaluated in the most complicated parts, splicing of conveyor belts by means of hot or cold vulcanization causes many difficulties. We can speak about complicated technology, quality and it will be impossible to quickly fasten the conveyor belt as the downtime will last for 24-72 hours. However, mechanical conveyor belt fasteners have their disadvantages too.
A method of conveyor belt fastening primarily consisted in sewing transversal cuts in the cloth. The lengthwise cuts were sewn with patches, the edges were glued and such repairs significantly influenced the durability (technical characteristics) of the conveyor belt.
The threads and cables were gradually substituted by more advanced variants, from which the main methods to restore a conveyor are still used.
It is possible to distinguish swing-rivet fastening (solid) and swing bolt fastening, in the foundation of which is fixing of a metal conveyor belt fastener to the belt butt ends, between which a pin joint is placed. It is a rod, a special construction lock, that helps the joint to turn, when a drum passes.
A joining element, the assembly of which requires eliminating the restored part of the belt, while doing he following repairs, means to install solid fasteners. The task of this joining is to minimize the waste of a drum and rolls and it has two types:
For your information! Besides rivets, it is recommended to use clamps, pressed into the fabric cord of the conveyor belt and the method of “breaking” rubber cloth of the belt by means of clamps. A disadvantage of this type is that it is impossible to repair the defected part of the belt without any additional prolongation of the belt in case of a repeated damage.
Besides this fact, solid fasteners significantly increase cylinder and waste of rollers. Technically, flexible fasteners that are placed in accordance with the drum radius and that allow the belt to support high cargoes, do not have such disadvantages.
Elastic locks refer to a mechanical type, but are a piece of a belt from a material with analogical characteristics. Fastening is made in two ways:
In any case choosing a correct method of restoring a transporter is treated very seriously, preparing materials and equipment, needed for repairs beforehand.
There are options for any case in a range of PWS fasteners, but it is worth considering the general principles of a correct choice.
From What Materials Conveyor Belt Fasteners are Made
With the purpose to decrease the production cost, numerous enterprises use usual steel, less often alloy steel. However, the application of these materials is limited for certain companies, especially dangerous types of them. The priority is given to special steels and alloys without any limitations in their application:
In the dynamics of the conveyor belt movement, passing through a transmission drum (shank end) is especially important. The belt is working with bending here and being subject to maximal cargoes, that is why the diameter of a drum is a basic parameter for calculations here. Elastic rubber turns the drum around without any problems, but adding of the fasteners significantly increases the resistance of the repaired part. If fasteners are chosen incorrectly, both the belt and the drum will suffer from an increased waste. When a lock of a too big size is installed, the belt will over slip and the surface of the drum will have some additional impulsive loads. That is why the lower the size of the driving drum is, the lower the sizes of the locks should be.
The technology is well-prepared, you will not have to stop the production process for a long time or dismantle the conveyor.
For your information! Some minute differences in repairs depend on the peculiarities of the fasteners.
We hope that the article will help you to solve the problem of quick repairs.
