End locking bolts are tightened slightly. Carry out repairing of belt vulcanizing machines and tools. Along with knowledge about conveyor belts types, construction, procedure of belt joints. Higher loads, longer center distances, higher temperatures and tough applications require specific knowledge, a different approach and innovative solutions. This fact is of great significance in the view of the steel cord conveyor belt splicing technology, which relies on an adhesive connection between the cord and the rubber. The proposal also includes a quantitative measure of the rubber penetration of cord and the criteria for its identification. In the Polyvinyl chloride and Pvg whole-core flame-retardant anti-static conveyor belt joints, the general level 8 products below the use of this joint method.
Setup of the working table. The steel reinforced elevator belt structure. Most cold vulcanization cements require at least four hours for a usable cure and 24 hours for a full cure. Restricted use of cookies in the browser configuration may affect some functionalities of the website. The belt ends have to be tensioned as much as possible to avoid sag. If this additional part would not be applied, the warp cords could shift and could possibly be pulled out. They remain completely covered by rubber after this procedure. Steel cord belt fasteners produced by other suppliers are often locked (single use only). The curing time should be determined according to the specifications provided by the conveyor belt manufacturer and the corresponding thickness of the conveyor belt. Again, when maintenance is required on one of the pulleys for example, the belt has to be cut and the belt fastener cannot be reused and has to be considered as an unnecessary loss. Small fabric belt splices can often be cured in a single setup. The free samples are supported to send for your testing.
It is common practice to grind or buff away any surplus rubber from the splice to improve the performance of the joint as it passes through belt cleaners and other conveyor components. STEEL CORD CONVEYOR BELT SPLICING - STEP BY STEP. Vulcanization joints to take the step-type structure joints. The effect of the centrifugal forces on the clamp when passing the pulleys should not be underestimated. Self-curing repairs generally do not last. The straightness of the splice is doublechecked. Once a belt is aging due to affection of heat, the wear and tear due to the attached objects will be more severe, for the reason that the rubber loses its strength and elasticity.
The wedge is manufactured from rubber and is replaceable. Place the two conveyor belts on the platforms on their respective sides, and find the centerlines of the two conveyor belts (when looking for the centerline, find 3 points on each side of the belt and the distance between the two points is not less than 1m), and then align it on a straight line and fix it on the platform. As steel cord conveyor belts are vulcanized during the production process, rubber penetrates into steel cords. Vulcanized splices require the cutting away of layers of rubber covers and fabric carcass to let the belt ends be overlapped and joined. Bias spices are most common, as the angle increases the length of the bonding surface and reduces stress on the splice as it wraps around the conveyor's pulleys. You're Reading a Free Preview. Working platform will be removed. Finger splices must be preformed in a single "cook.
A) Fasteners: One of the issues with fasteners and/or lacings is that the entire load is thrown on a very small portion of the belt. Beltcare uncured skim rubber Steel Wire Pull Out Strength ≥5500N(test condition: SS wire diameter 5mm, Vulcanizing Temperature 145℃), and Elongation at break≥300%, We selected high-quality hot splicing materials to achieve the same performance of the splices as the original conveyor belt. Therefore, more perfect longitudinal tear protection device is needed. It can be executed in dusty environments and is suitable for all types of belts with varying widths and thicknesses. SKE machinery is a service provider of belt bulk conveying system. Training & Development. The vice-part is securely placed, unlike the belt fastener, not on the rubber belt surface but holds the steel cords of the elevator belt and therefore the rubber covers and weft cords should be omitted. Another anti tearing protection device is composed of a winding hanging idler and a limit switch, which is installed in the idler of the loading point. The rubber edges are removed.
Perform routine maintenance of equipment. It would be best if the belt fastener could be reused again, since it is an expensive component which should be durable. Conveyor Steel Cord Belt Rip Monitoring and Protection Device. Plugging-in again when temperature drops to 142°C.
Our Uncured Cover Rubber& Skim rubber are designed for use in step splicing and finger splicing of belts, they are tried and tested successfully domestic. As it creates the highest return to original belt strength, it is ideal for splicing, cuts or tears, holes, or breakdowns between steel cords and fabric. Temperature is regulated by self-controlled heating platens or by switching energy on and off. Steel cord conveyor belt. With the Polysur® Solid belt fastener you only have to consider to replace the bolts, washers and nuts in the clamp, and if worn, the rubber wedge section. The assembled rubber wedge is considered a critical part, since there will be a lot of pressure and friction inflicted on the belt every time it is running over the pulley. The belt ends are bend 90° with a radius of 75 mm.
The wedge ensures the guiding and protection of the elevator belt and procures an extra protection surface as well. When the vulcanization procedure, or "cook", is completed, the resulting splice should be inspected for any visible defects that might indicate a weakness. Uncured Intermediate Rubber(Uncured Skim Rubber) is designed to use as an inter-core cord rubber replacement material in splicing steel cord conveyor belts or a tie gum in fabric belts. With steel-cord belts and finger splices, it is important that the press be large enough to cure the splice in a single setup to avoid undesirable rubber flow and cord displacement.
000 N/mm our Polysur® Solid belt fastener with a triple steel vice-part is recommended. REMA TIP TOP also offers Critical spare splice kit inventory management to further reduce downtime and cost during unplanned outages. In practical applications, the integrity of the splice is critical to minimizing the risk of downtime. For all splice designs, it is important that the overlapped areas and any materials added to the joint be properly installed to minimize damage to the finished splice from belt-cleaning systems or other components. The entire splice area will be sparingly coated with rubber solution and allowed to dry completely. The vulcanization is initiated by plugging the heating platens in. Stripping Away the Cover Stock.
In hot vulcanization, a special press applies both heat and pressure to the splice to cure the intermediary and cover materials into a high-strength joint. Why purchase an expensive, high tensile strength belt only to have it fail because of a metal joint that retains less than half the strength of the belt? Moreover, this central rubberized section ensures the safe use of different belt constructions with different belt thicknesses. Additional leakage leads to product loss, can contribute to additional build up on pulleys and create more belt maintenance work.
The ALMEX Flexible Platen contours to the belt regardless of wear. Portable vulcanizing presses for curing the splice are available in sizes to match various belt widths. Mechanical joint generally refers to the use of belt buckle joint, this joint method is convenient, fast and more economical, but the joint efficiency is low, easy to damage, on the conveyor belt Product lifetime has a certain impact. Support maintenance of plant equipment as when required. If it is necessary to shorten the belt(s), a wedge-shaped strip of approx. To make sure that the belt fastener runs smoothly over the pulley, with less vibration, there has been assembled on top of the wedge a part of high heat rubber profile, which is unique in the industry. REZAEIAN I., ZAHEDI P., REZAEIAN A., 2012, Rubber adhesion to different substrates and its im-portance in industrial applications: a review, Journal of Adhesion Science and Technology, Vol. Pressure will be increased as temperature rises. Reward Your Curiosity.
The reasonable curing temperature is generally 144℃~147℃. Strengthen the quality and process management of the conveyor belt joint, and strictly follow the joint operation procedures; 2. Mechanical pressure deflects the frames causing loss of pressure in the center of the vulcanizer. Belt surface, ramps and edges are being inspected visually. There is a savings in labor since there is no need to shim worn sections. Conventional vulcanizing equipment is often deemed too heavy and time-consuming to setup. The presented method is reliable and can be used for a broad range of cord diameters and designs.
The total width of the belt fastener has to be approximately 15 mm less compared to the width of the full elevator belt. Hot splicing is a method of repair that uses both heat, time, and pressure to re-splice a belt. High-quality Hot splicing repair materials have Long-Shelf life in common storage conditions, up to 24 months, it is suitable for long-distance transportation. How does this contribute to reducing your cost? In order to ensure the normal operation of the conveyor and avoid the long-term production stagnation caused by the fracture and tear of the conveyor belt, we need to install the conveyor belt broken and tear protection and monitoring device.
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