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Rubber Conveyor Belt Vulcanizing VS Mechanical Splicing

Mechanical Splicing VS Vulcanization

There are two ways to splice conveyor belts: vulcanization and mechanical splicing. Vulcanization is mainly used to splice conveyor belts through heating or chemical treatment. Mechanical splicing uses metal hinges or plates to splice conveyor belts. How to choose vulcanization and mechanical splicing? Which method is better?

Before making a decision, it is important to understand the advantages and disadvantages of vulcanization and mechanical splicing.


There are several different types of vulcanized splices, including finger splice, wedge splice, stepped splice and overlap splice. And two types of vulcanizing processes: hot vulcanization and cold vulcanization.

Hot vulcanization method

Hot vulcanisation splices are heated and cured under pressure with a vulcanising press. This process takes several hours. And the belt can only be used after the splice has cooled down.

Hot vulcanization pays attention to the quality of the belt: the material of the conveyor belt, the formula, the thickness of the covering layer, the manufacturing process of the belt (temperature, time, pressure) and the performance of the processing equipment. Of course, good vulcanization also requires a team of professional workers and a good vulcanizing machine.

Cold vulcanization method

Cold vulcanisation does not use a press, but uses a bonding agent that causes a chemical reaction to splice the two belt ends together. Like hot vulcanization, this process takes several hours.

Good cold vulcanization focuses on the quality of the chemical adhesive (formulation, storage environment and expiration date), working conditions (temperature, dust-free) and the skills of the operator.

Advantages of vulcanization

Vulcanization improves the durability of the conveyor belt. The repaired belt can be used for a long time, thereby reducing the risk of repeated failures and equipment downtime.

The longevity of vulcanized splices is longer than that of mechanical splices.

Limitations of vulcanization

Whether it is cold vulcanization or hot vulcanization, the conveyor belt needs to be disassembled when splicing.

Depending on the working conditions, it takes about 8-11 hours to vulcanize a 24-inch conveyor belt, and a wider conveyor belt may take longer.

Not all conveyor belts can be vulcanized. Old, dirty and unevenly worn conveyor belts are not suitable for vulcanization.

Vulcanization requires clean, dry and relatively warm conditions to succeed.

Vulcanized splices wear from the inside out, so damage may not be obvious.

Considering material and labor costs, vulcanization may require a higher cost for each splice, especially hot vulcanization.

Mechanical splicing

There are several types of mechanical fasteners, and each type of fastener can be used for different belt widths, lengths, thicknesses, speeds, tensions and cleaning agents.

Advantages of mechanical splicing

Regardless of the belt condition, mechanical splicing is a good choice for new and old belts.

Mechanical splicing does not need to consider the site environment, and mechanical fasteners can be used at any time to quickly splice.

The wear of mechanical splice is easy to check and can be replaced in time.

Mechanical splicing tools are light in weight and easy to carry on site.

In most applications, mechanical joints can provide the required flexibility, economy, and speed to minimize material and labor costs and avoid expensive downtime.

Limitations of mechanical splicing

Mechanical fasteners will wear out over time, and it may pierce or tear the conveyor belt.

The longevity of the splice is shorter than that of the vulcanized splice.


When splicing belts, you can decide which conveyor belt splicing is more suitable according to the surrounding environment of the belt, working conditions, and the state of the conveyor belt. You can contact us for any conveyor belt questions.