1. Why do other construction agencies generally do not advocate the use of sealing glue?
A: The function of the sealing glue is to connect the two ends of the vulcanization, and also prevent the intrusion of harmful media such as water and prevent the cleaner from damaging the joint. Therefore, in order to synchronize the service life of the vulcanized joint with the belt body, it is necessary to use a sealing glue to prolong the service life of the belt body.
The use of sealing glue as a vulcanizing joint will increase the cost and at the same time increase the difficulty of the joint. Therefore, some construction companies will not advocate the use of sealing glue. In practice, this has a negative effect on the service life of the conveyor belt.
2. Can you keep the core glue and apply several layers of glue?
A: Mastic is a gel with certain viscosity formed by dissolving the core glue in a solvent. After the solvent is completely volatilized, its composition is exactly the same as that of the core glue. However, the commonly used cement is prepared by modulating the ratio of 1:5 to 1:6 with the core glue and a solvent (such as toluene, xylene, solvent gasoline, etc.). . The core glue is a film that has been calendered by a calender. Its molecular arrangement sequence is oriented. From the mechanical point of view, it has anisotropy, so the tensile property and fatigue resistance along the rolling direction are better. The rubber molecules in the solvent are random and are isotropic. The role of the dope is to allow the solvent-soluble rubber to fully penetrate into the texture through the solvent's good fluidity and permeability, so that the rubber can be better combined with the fabric. Therefore, the function of the core glue is to bond the cloth layers of the conveyor belt together, eliminate the difference in the stress and deformation of the conveyor belt caused by different thicknesses, and absorb some of the destructive energy, so the core glue is in the conveyor belt. Is an indispensable part, some foreign manufacturers in order to extend the service life, often using thicker core adhesive thickness method.
Only using glue instead of core glue, the thickness of the glue between the cloths at the joint is relatively thin, and its use effect will also be affected.
3. When you pull the head, you find that the glue is attached to a layer of cloth, while the other cloth is light. Why?
A: There are several reasons why the adhesive is attached to a layer of cloth:
(1) poor adhesion;
(2) Adhesion is better, but the adhesive strength is higher.
In general terms, when nylon tapes and some EP tapes are pulled, it is relatively easy to have glue on both occasions, and the thickness of the adhesive is almost the same, while the cotton canvas tape is prone to appear on the above-mentioned layer of cloth with glue. This is the case with light on a layer of cloth. Of course, some EP tapes with poor adhesion or EP tapes with better adhesive strength but higher adhesive strength will also appear.
4. Why does the joint feel harder than other parts?
A: The process of vulcanizing the conveyor belt is actually the process of the vulcanized rubber continuing to cross-link. Since vulcanization needs to be heated and pressurized, and it takes a relatively long time, after a relatively long time of vulcanization, the hardness of the vulcanized rubber will increase, and therefore the joint will be harder than other parts.
5. When the edge of the edge of the plastic wear and cause layer delamination, how to deal with?
Answer: In the case where the delamination area is not large, it can be repaired by using cold glue, but it is necessary to pay attention to emptying the air. Of course, the best way is to correct it when you find that the conveyor belt has gone off-track.
Roller cover wear can be cold glue processing or hot glue processing?
A: After the roll covers are worn out, they can be treated in the cold, but the effect of on-site treatment is not good. The heat-treated roll covers can generally be used for more than 5 years, and the roll covers will not fall off due to unexpected conditions.
6. How to connect the two conveyor belts with the same number of layers?
A: Generally, this method cannot be used. However, when some accidents occur, this method must be adopted when the scene needs emergency. When using this method, it is better to put one seam of two layers on the bottom, and to put glue in the sealing glue, so as to eliminate the effect of inconsistent thickness on the joints of the conveyor belt.
7. What are the advantages and disadvantages of EP band and NN band?
A: (1) The NN conveyor belt is an alternative product to the cotton canvas conveyor belt. It has the advantages of high strength and good anti-fatigue performance. However, in the use process, the NN conveyor belt has a relatively large use elongation and is prone to elongation.
(2) The EP belt is an upgraded product of the NN belt. It has the advantages of a nylon conveyor belt, and at the same time has a wider range of application due to the relatively small elongation during use. However, the adhesive properties of EP canvas and rubber are not as good as those of NN canvas. Therefore, the EP conveyor belt is not as good as the NN conveyor belt in terms of the safety of the adhesive bonding.
8. Is the long conveyor belt easy to run?
A: There are deviations during the running of the conveyor belt. In general, due to the problem of the conveyor belt itself, the deviation of the conveyor belt is rare, and the deviation of the conveyor belt is mainly the cause of the conveyor. Due to the fact that the rollers are not parallel, the brackets are not vertical, and the roller rotation is not flexible, the conveyor belt can cause deviations. For relatively short conveyor belts, due to the inflexible rotation of the single-side drum and the relatively high probability of other factors, the possibility of deviations from the conveyor belt is greater, and the long conveyor belt, due to the increase in the number of idlers, The asymmetry of the side effects will be reduced, so that the deviation phenomenon exhibited on the conveyor belt will be less.
9. What is caused by the deviation of the conveyor belt without deviation?
Answer: The upper and lower sides of the conveyor belt are mutually influential and independent. Under normal circumstances, the parallelism of the lower roller and the levelness of the rollers will all cause the underside of the conveyor belt to deviate. Underside deviation, but the upper side of the normal situation is basically due to poor cleaning device, the next roller stick material, the weight of the roller is not parallel, or the weight bracket deflection, the lower roller is not parallel to each other , The specific situation should be adjusted according to the actual situation. In general speaking, the underside deviation can be corrected by improving the working condition of the cleaning device, removing the sticky material on the roller, the idler, adjusting the lower flat roller, the lower V-shaped idler, or under the installation Side adjusting roller to achieve the purpose of correction
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