What are the steps and technical requirements of hot vulcanized conveyor belts?

Hot vulcanized belt joints operate differently depending on the nature of the belt. The more common joints are generally layered knife hot vulcanized joints. Next, let's take a layered belt as an example.

Step 1: Carry out stepped layering treatment on the layered belt, then use an angle grinder and tungsten steel grinding disc to grind each layered part in a roundabout way, and use cleaning agent to deeply clean the layered part after cleaning. to remove impurities and oil stains on the surface of the belt;

Step 2: Evenly brush the hot vulcanized joint glue SK823 on the upper and lower layers of the layered part of the conveyor belt and the adhesive surface of the RIT unvulcanized core glue and RIT non-vulcanized surface adhesive, and then spread the core glue on each layered part, paying attention to the uniform laying;

Step 3: Spread the top adhesive along the gap after applying the superheated vulcanized glue, and the whole belt is a nearly flat surface.

Tip: It is recommended to use a wallpaper knife to make two cuts on the surface of the adhesive after lamination to avoid its bulging.

Step 4: With the help of a vulcanizing machine, the joint part is heated and pressurized (when the temperature reaches 145, a constant temperature of 40-45 minutes is required) The time is reached, and the heating is stopped. After the vulcanizer cools down, the vulcanizer is dismantled, and the rubber knife is used to trim the belt joint, and the vulcanization is completed after repair.

The steps depend on what kind of conveyor belt it is, I learned it in Gruffa, you can ask about it. They can use materials and technology.

There are three ways to bond conveyor belts: belt buckle connection method, hot melt method, and cold bonding method. These three methods can effectively bond conveyor belts, each with its own advantages and disadvantages, and can be adopted according to the situation.

Hot vulcanized joints are the most ideal method of splicing, the joint is very efficient, but also very stable, and the joint life is much longer than that of cold bonding and belt fastening methods. However, the operation process is cumbersome, and the cost is relatively high.

Hot Vulcanized Joints:The two ends of the conveyor belt are sanded in layers, coated with hot vulcanized mortar SK823, and then the two ends are docked together and simply fixed with a heat gun. The assembled conveyor belt will be heated and pressurized on the vulcanizer for hot vulcanization, the temperature is about 140 °C for 40-45 minutes of constant temperature, and after the cloth layer reaches the holding time, stop heating and let it cool naturally to room temperature, and remove the conveyor belt can be used normally.

The specific properties of the material need to be considered when performing joint operation, including: loose density, particle size of the material, maximum lumpiness, humidity of the material, abrasion, cohesiveness and coefficient of friction. The amount of conveyance is taken into account.

The conveyor belt hot vulcanization joint process is that all conveyor belts must be connected into a ring before they can be actually used, so the splice of the conveyor belt is a very critical preparation link. The quality of the joint directly affects the service life of the conveyor belt and whether the conveyor line can run smoothly and smoothly.

Conveyor belt hot vulcanization joint operation steps;

1.Draw the connector line.

According to the size of the damage of the conveyor belt, at least 15 20mm larger along the perimeter of the damage, draw a cutting and repair line, cut at an angle of 45 degrees, and peel off the damaged cover glue, and be careful not to damage the cloth layer or steel wire layer below when cutting.

2.Burnish. The damaged part of the conveyor belt is deeply polished with an angle grinder and tungsten steel grinding disc, and it is recommended to polish 3mm.

3.Cleaning. The sanded conveyor belt is cleaned with SK823 to ensure that the surface of the fabric layer or steel wire layer is clean.

4.Use a brush to evenly apply a layer of hot vulcanizing agent SK823 on the surface of the cleaned fabric layer or steel wire layer, which is required to be evenly and completely, without leakage, and let it dry completely.

5.Glue spreading. Spread the brushed tape with RIT core glue and RIT surface adhesive, and try to spread it flat when laying it to avoid bulging.

6.Vulcanization. Pressurized, heated vulcanization is performed using a hot vulcanizing patcher or vulcanizing press. After the vulcanization time of the rubber conveyor belt vulcanization joint is reached, the vulcanization temperature must be reduced by 40 or less by way of pressure holding and cooling before it can be opened.

Go to the hot plate first! Or go to the water temperature plate first.

1. Surface treatment: make the conveyor belt joint into an oblique stepped cover joint according to the lap length of 1 2 bandwidth, and then beat the surface of the joint and clean, decontaminate and dry it with a cleaning agent.

2. Glue paste: evenly brush the vulcanized glue on the surface of the joint and vulcanized film once or twice, wait for the solution to volatilize until the glue surface is basically dry, and then attach the vulcanized film to the surface of the joint coated with vulcanized glue, and paste the buffer tape at the gap between the same cloth layer (note that if the glue is not dry, bubbles will be generated, resulting in reduced adhesion performance).

3. Lamination and pressure: After the glue solvent volatilizes to the glue surface is basically dry, the two ends are laminated. When laminating, it is laminated from the middle of the conveyor belt to both sides (so that air can escape from both sides), and the degree of loosening on both sides of the film is consistent, and the joints are aligned with each step and the center line is aligned.

After lamination, fully roll to prevent the accumulation of air bubbles, and press the two hot plates on the joint and under to apply a certain amount of pressure. When pressurizing, be careful not to misalign the joints, and the pressure should be uniform.

4. Heating vulcanization: install the vulcanization device. When the heating plate is heated for 15-25 minutes, press it once to ensure that the joint is under sufficient pressure.

When the temperature reaches 80, the pressure is required to reach 1 0-2 0MPa, and then stop pressurizing and continue to heat. When the temperature rises to 145, start the timer, and after the constant temperature is 145-150, 45 nails, immediately stop the heating, and let it cool naturally to room temperature.

5. After the trimming joint is restored to normal temperature, remove the heating plate, and remove the overflowing residual rubber and the rubber that is higher than the belt surface, so that the surface of the joint is flat, smooth and clean.

The construction team of Zhengzhou Dipute conveyor belt maintenance center has summed up in many years of construction experience. Hope it helps. This is the operational process of hot vulcanization.

Vulcanization process conditions.

1.Vulcanization unit pressure:

2.Vulcanization temperature: 150 degrees 5 degrees.

3.Vulcanization time t = 18 minutes + tape thickness (mm) 1 minute. (18 minutes is the basic vulcanization time).

4.Compressibility coefficient 7-10%.

5.The vulcanization pressure is, the pressure that can be given at the beginning, as the temperature of the heating plate rises, the pressure also rises gradually, when the temperature is 50, the pressure is; When the temperature is 80, the pressure is ; When the temperature is 100, the rated pressure is given, when it rises to 145, the timing constant temperature is started, the pressure must be kept above during the constant temperature process, when the pressure is insufficient, the pressure is reduced at any time, and the pressure is made up at any time, after the vulcanization time is reached, the pressure should be cooled to below 70 before the water pressure can be removed, the vulcanizer is opened, and the tape is removed.

Safety precautions. 1.Construction personnel must wear safety helmets when entering the construction site.

2.Operators must strictly abide by the coal mine safety operation procedures.

3.It is strictly forbidden to work after drinking, illegal operations and other phenomena.

4.Hard-soled plastic shoes are not allowed to enter the construction site.

5.Since the materials used for gluing are flammable substances, fire prevention equipment should be prepared.

6.The choice of gluing place should be in a place with good ventilation conditions.

7.The electrical equipment used should be grounded.

8.Staff must concentrate and not be allowed to laugh or talk to others.

9.In a dusty environment, measures must be taken to build a scaffold.

10.Move the vulcanizing appliance to avoid scratches and collisions.

11.If the work is not well ventilated or for a long time, wear a gas mask.

12.Smoking is strictly prohibited in the work area.

Vulcanization process. 1.Check whether the surface of the joint is flat before vulcanization, and verify the thickness and width. Correctly select the mold bar (the mold bar is 1-2 mm thinner than the thickness and width of the belt).

2.Check the position of the joint on the vulcanized plate, the connection should be at least 150 mm long on each side of the longitudinal plate, and at least 50 mm wider than the conveyor belt on each side of the transverse plate.

3.The selected mold bar is pressed against both sides of the tape, fixed with a screw rod, and the clamping bolt is tightened.

4.Silicone oil is placed on the vulcanized tape, then a heating plate is placed, and finally the upper beam is reinforced, and the beam distance is aligned up and down.

5.Install and tighten the clamping bolts until they can't be screwed, if there is a large gap between the upper and lower heating plates, it is necessary to fill it with waste tape of the same thickness as the vulcanized tape.

Vulcanized adhesive conveyor belts should first understand the relationship between RIT core glue, top adhesive and SK823 glue. Hot vulcanizing belt bonding must use hot vulcanizing agent, unvulcanized core glue and surface adhesive, rubber material after high slippery picostate temperature melt vulcanization and belt integration, hot vulcanizing agent in which it plays a unique role?

Hot vulcanizing agent, also known as hot vulcanizing glue SK823, its main function is to improve the adhesion between the lap surface material of the belt joint and the rubber compound. Although the hot vulcanized core glue and top adhesive have a certain adhesion, the effect is not ideal when vulcanizing directly with the fiber layer of the belt or the wire rope core, because the simple rubber material is heated and pressured vulcanized, and the rubber material can not penetrate into the small gaps even after melting, and the belt is only completed on the surface of the bonding, and the rubber material can not be compacted and filled with the core layer, which is prone to belt joint glue opening, wire rope belt core pulling, etc.

SK823 is a solvent-based liquid with very low viscosity, single coating, low viscosity, good fluidity, solvent volatile, and it is very easy to penetrate into the surface of fabrics and wire ropes.

1.When laying, you should pay attention to the working and non-working surfaces of the conveyor belt and the direction of winding, do not make a mistake, and adjust the conveyor belt so that its center is consistent with the center of the roller frame.

2.When cutting, the rough cutter should be used correctly, do not cut the canvas, otherwise it will reduce the strength of the conveyor belt, for this purpose when cutting, generally leave a residual layer between the rubber layer and the canvas layer, and leave a residual layer between the canvas layer.

3.Prevent poor sanding of the joint surface or damage to the canvas.

4.Adhesive surfaces should be kept clean at all times to prevent oil, water, or dust from sticking.

5.After the conveyor belt canvas is damp, it should be dried or dried in the cavity and then glued, and the nylon canvas has strong water absorption. Pay more attention during operation, otherwise there will be bubbles, delamination and other defects after the conveyor belt joint.

6.When connecting the last head, attention should be paid to the tensioning stroke of the conveyor.

7.When stripping, pay attention to the determination of the upper and lower joints, and ensure that the upper joints are consistent with the running direction.

8.Prevent overlapping steps, which can lead to premature stripping.

9.The glue should be applied evenly, and it must not cause local glue deficiency or pores.

10.If there is bubbling when laminating, it should be pierced and compacted after exhausting.

11.With RIT core glue, RIT topviser and hot vulcanizing agent SK823, pay attention to its shelf life.

12.After the material is sealed, it is stored in a cold and dark place.

The vulcanization joint process depends on what kind of conveyor belt it is, and there are three main types of commonly used at present.

1. The vulcanized joint of ordinary conveyor belt is not much different from cold bonding, but the material used is different.

2. The vulcanized joint of the steel wire rope core conveyor belt is basically the purchase of vulcanized joints, and the length of the joint is determined according to the strength, slope and other related factors.

3. The whole core flame retardant conveying spring is being sent with vulcanized joints, this kind of belt can also use vulcanized joints now, and the length of the vulcanized joints in the form of fingers or strips used by Qing Zheng is also determined according to factors such as belt strength.

Therefore, you need to determine what kind of tape it is, what kind of vulcanized joint glue is used, and the process can generally be found on the Internet

SC2002 happened to be used in Zhengzhou Dipte, they made a good belt joint, it happened that the technical staff had an introduction, and you shared the sale of eggplant:

When the conveyor belt joint is cured after gluing, the following matters need to be paid attention to:

1. After the belt joint is bonded, it should be allowed to stand and cure for 30 to 60 minutes at room temperature before tensioning, and the site can be cleaned up and the load can be run for production.

2. If conditions permit, extending the curing time will make the bonding effect better.

3. To bond the belt in a low temperature or humid environment, in addition to baking, the curing time must be extended to a long enough time, generally 24 hours.

Years of experience in the sales and technical consulting services of conveyor belt vulcanizer show that the selection and procurement of conveyor belt vulcanizer according to the following steps and projects will help users choose the most cost-effective vulcanizer equipment.

Step Selection Project Selection Based on Key Indicators.

1 Is the construction environment required to be flameproof? General purpose Flameproof type.

2 On-site requirements: General joints, belt repair, natural cooling, water cooling system.

3 Power supply condition 380V 660V working voltage V = volt, phase.

4 Working pressure Conveyor belt variety, process, structure, etc. Working pressure p = bar

5 Vulcanizer bandwidth size Conveyor belt bandwidth b Applicable bandwidth b = mm

6 Vulcanizer joint length Conveyor belt specifications (model, strength, width, thickness, etc.) Vulcanization length lv = mm