Rubber conveyor belt is made of several layers of fiber fabric and rubber bonded into a tape, used for transporting lumpy, granular, powdery or pieces of goods. Widely used in mining, building materials, chemical, coal, electric power, metallurgy and other industries.

1. Common damage forms of rubber conveyor belt

Common forms of conveyor belt damage include:

1. Longitudinal tearing of conveyor belt;

2. Transverse tearing of the conveyor belt;

3, conveyor belt vulcanization joint tear;

4. Conveyor belt cracking;

5. The upper and lower adhesive layers of the conveyor belt are worn.

Two, the harm of conveyor belt damage

1. If the rubber conveyor belt is partially damaged and the core layer is not repaired in time, rain and foreign pollutants will soak into the deep layer of the belt, which will expand the damaged part of the conveyor belt and shorten the service life.

2. For the steel wire rope conveyor belt, if the steel wire rope is exposed, it will not be able to operate normally without repair, and it may also cause the conveyor belt to be scrapped, causing great impact on the production of users and economic losses.

Three, conveyor belt joint bonding

The bonding of conveyor belt joints mainly includes three forms: cold bonding, hot curing bonding and mechanical bonding.

1, cold bonding

Note: For the characteristics and main process of cold bonding, please refer to the previous article: Selection of Conveyor Belt Adhesion Repair Products (I) - Conveyor Belt Joint Lap (Cold Sticking).

2, hot vulcanization bonding

Note: for the characteristics and main process of hot vulcanization bonding, please refer to the previous article: "Selection of adhesive repair products for conveyor belt (2) - hot vulcanization bonding for conveyor belt joints".

Four, conveyor belt repair

Conveyor belt repair strip quick repair process is in the rubber conveyor belt in the normal operation of scratches, tears, puncture and other problems can be used to toughen the cold rubber adhesive and belt repair strip for repair, or the use of quick rubber repair agent for repair. In addition to the selection of appropriate belt cold adhesive and the corresponding repair strip, the use of reasonable bonding process can obtain a firm bonding effect.

1, the use of toughening cold bonding and conveyor belt repair adhesive strip repair

The first step is surface treatment

First of all, the scratch part is marked and marked, and the high power and low speed Angle grinder with tungsten steel grinding disc is used for grinding treatment, and the cleaning is done.

Step 2: Mix the glue

The power can 2000 rubber toughening cold adhesive two components according to the ratio of 10:1 to mix, and stir evenly. (Note: the mixed glue must be ready to use, from mixing to use should be controlled in 20-30 minutes, otherwise it is easy to solidify and failure.)

Step 3 Apply glue

With short and hard brush on the conveyor belt of fully dry adhesive surface along a direction respectively equably besmear to brush glue solution twice, rubber not too thick, dry after each coating film to watch, namely after solvent evaporation, to not have adhesion fingers on the back of the viscous force is brushed again next time when feeling glue, due to the glued surfaces easy adsorption air, in order to prevent the package and make the rubber air bubble or porosity, The glue should move in one direction. The gluing speed should not be too fast to facilitate the discharge of air.

The power of 2000 rubber toughening cold viscose

Step 4 Dry

Solvent type belt cold adhesive coating after the drying process, the main purpose of the drying to make solvent volatilization, viscosity increase, promote curing. The drying time can not be too long or too short. After each coating, the glue should be dry to the point where it does not stick to the back of the fingers. The drying environment should be well ventilated, clean and clean (Note: the glue layer should be thin each time the coating is brushed; The last layer of glue to ensure a certain viscosity, easy to paste repair tape).

In order to save time and make the glue reach the final curing strength in advance and improve the bonding strength, after each glue coating, the iodine tungsten lamp or infrared lamp can be used to bake (bake temperature 60-80℃) until it does not adhere to the back of the finger and then brush the glue again. When baking, the vertical distance between the lamp and the bonded surface shall not be less than 50cm, otherwise it is easy to cause the glue film baking paste to lose the bonding effect. It is particularly necessary to bond and bake dry in a low temperature and wet environment (Note: try not to use this product under wet conditions).

Step 5: Bonding

After the second glue is baked until it does not adhere to the back of the finger, the conveyor belt repair strip is pasted from one end, and the roller is used for compaction rolling. In the process of compaction, it should be compacted from the middle to both sides so as to facilitate the discharge of air.

Power POX-GE ordinary rubber repair strip /POX-ST enhanced repair strip

Step 6 Curing

After the bonding is completed, it should be cured for at least 120 minutes at room temperature and under dry conditions. After curing, the conveyor belt can be put into use.

2, the use of quick rubber repair agent repair

The rubber repair agent is used to repair the damaged parts of the conveyor belt. The operation steps mainly include surface treatment, grinding, mixing (Beilianai 3000 super rubber repair agent, Beilianai 3000-T super rubber repair agent can be mixed with the inner packaging of the two components), gluing and curing. The operation method can be rubber repair skin repair the first step to the fourth step is basically the same, here will not be repeated.

Bilionai 3000 Super Rubber Repair

Bilionai 3000-T Super Rubber Repair

(thixotropic not flowing)

There are many forms of conveyor belt damage in the process of use. In the actual repair process, the corresponding repair technology should be adopted according to the specific damage. This paper is for reference only.

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