What details should be paid attention to when applying rubber to a drum

Currently, when conducting roller rubberization in industrial and mining operations, the cold vulcanization method is predominantly employed for on-site rubberization. Cold vulcanization involves the process of coldly adhering rubber sheets to the surface of the roller using glue. The higher the bonding strength, the more secure the adhesion, and correspondingly, the roller can withstand higher-intensity conveying work. The cold adhesive glue, rubber sheets, and on-site construction operations all have an impact on the effectiveness of roller rubberization.
When selecting materials such as rubber sheets and glue, as well as conducting on-site construction, construction personnel must strictly adhere to the on-site construction requirements. Today, let's take a look at the details to be aware of when applying rubber to drums?
The adhesive glue for roller coating plays a decisive role in the bonding effect between the roller and the rubber plate. Currently, CVUL cold vulcanization roller coating glue CV2000 is widely used as a cold bonding glue, which is used in conjunction with RIT roller coating rubber plates with CN vulcanization layer for on-site operation. After hardening, the adhesive strength of the glue can reach 10000cps, comparable to that of hot vulcanization glue.
The purpose of covering the roller with rubber is to protect it from corrosion and wear, while utilizing the high friction coefficient of rubber to enhance the friction between the roller and the belt. The wear resistance coefficient of the rubber determines how long the roller's rubber covering can last, while the friction coefficient determines the efficiency of power transmission. Both the wear resistance coefficient and friction coefficient of the rubber depend on its material and manufacturing process.
Traditional recycled rubber sheets contain many impurities, exhibit poor adhesion, have high sulfur content, and are prone to aging, which further reduces the adhesion. After bonding, various additives precipitate out from the rubber, contaminating the bonding surface and potentially even causing the adhesive to fail and the rubber sheet to fall off.
Currently, the CVUL roller rubber plates that are commonly used possess excellent flexibility, which allows the rubber plates to avoid adhering to materials through their own stretching and squeezing during operation, ensuring self-cleaning and minimal friction reduction. Among them, rubber plates with diamond-shaped or herringbone surfaces exhibit greater friction, performing better than flat rubber plates when conveying wet, sticky materials. For conveyor systems with high tension, large carrying capacity, and handling slurry or highly abrasive materials, ceramic rubber plates are recommended for roller rubberization, as ceramic rubber plates currently exhibit the highest wear resistance and friction resistance.
Precautions for on-site operation of drum rubber coating
Before applying rubber, the surface of the roller needs to be polished to increase the contact area between the roller and the rubber plate. To ensure a good polishing effect and effectively prevent rubber aging, a high-power low-speed angle grinder equipped with a tungsten steel disc is often used for the operation.
After sanding, the roller surface needs to be coated with cleaning agent for 1 to 2 times to deeply remove the grease and impurities on the roller surface. After drying, apply a layer of metal primer on the roller surface, which can effectively ensure the wettability of the glue, making the roller surface easier to bond.
After drying, apply two coats of glue to the surface of the roller, and one coat of glue to the bonding surface of the adhesive board. When it is slightly sticky to the back of your hand, stick the adhesive board onto the roller surface and use a rubber hammer to press it firmly into place.
Afterwards, it is necessary to use rubber repair agent or T2 adhesive to seal and fill the interface part of the roller's rubber coating. Then, the sealed part can be repaired and leveled off.