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Indra Belting Company

    CHHIPITOLA, AGRA-282002,                                                      E-Mail    :   IBC@SANCHARNET.IN 

    UTTAR PRADESH,                                                                        PHONE :  (O) 267538 , 383933

    INDIA.

Rubber Conveyor Belting

INTRODUCTION
With the rapid growth of industries in our country, there is a huge need for proper handling of materials from one place to another. Conveyor Belts are found to be the best and most accepted mode of conveying. It provides an economical and practical means for transporting bulk materials over long distances. With increased industrial mechanization, Belt Conveyors are being extensively used by industries all over the world. Number of industries like fertilizer plants, coal washereies, paper industries, collieries, tea estates and pharmaceuticals are profitabily using conveyor belts for handling operation (Packaging, blending, sorting, batching, weighing etc.). IBC Conveyor and Elevator Belts are made from high strength pre-stretched cotton and synthetic fabrics coated with top quality polymer compounds for better inter ply and cover to ply adhesion to withstand abrasion, changing weather, and heavy load impacts. We specialise in safeguarding conveyor belts against corrosion, ionic radicals, fungus, humidity and to meet severe climatic variations. We take pleasure in the fact that we have gained goodwill and trust with the consistently good quality of the products we have introduced into the market. IBC Conveyors are manufactured as per IS : 1981 Part-I, II, III and IV (1978) and are marked as such. Our plant is well equipped with sophisticated modern machines for manufacturing conveyor belts from the best raw materials available using latest technology of production and testing in rubber latex polymers. Strict quality control measures are undertaken by our technical expertise. Thus IBC Conveyor belts are noted for their long term dependability and low cost operation.


TYPES OF CONVEYOR BELTING

S.No.

Belt Construction

Advantages and uses

Remarks

1.

Straight ply

General purpose

Full width plies.
Uniform cover thickness across the belt width.
2. Stepped ply

Increased traverse flexibility.
Enhanced belt life without increasing belt thickness.
Extra resistance to wear at the centre.

Minimum of three plies at the bottom.
One or more steps on the loading side.
3. Reversed stepped ply

For handling submerged ash in boiler plants.
Operates underwater.
Wear on pulley side is more.
Usually offered in Heat Resistant grade covers with vulcanised splices.

Reversed stepped ply construction with reinforced edges.

 
4. Breaker fabric

Improves adhesion between rubber cover and carcass.
Improves impact and tear resistance of rubber cover.

 Open mesh fabric (cotton or nylon) embedded in-between carcass and rubber cover of the belt.
5. Edge reinforcement

Resists severe wear on edges. Better adhesion between edge rubber and the carcass.
For handling systems with side loadings.

Top and bottom fabric layers of the carcass are wider than the middle portion of the carcass.
Belt edges are protected with breaker fabric strips.

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CONVEYOR BELT PERFORMANCE GUIDELINES
The conveyor belt represents a major portion of the total conveyor cost. Special attention is to be given towards belt operation and maintenance to minimize replacement and repair costs. Conveyor belt carries the maximum tension loads during its working which includes material load, pulley tensions, and tensions due to other accessories. Belt flexibility, its construction, and composition makes it vulnerable to accidental damage and/or accelerated wear which may occur from loading improper grades, sizes, or volumes of conveyed material onto the belt. Besides, foreign materials like spikes, tramp iron, timbers etc. when entrained in the flow may cause unavoidable shutdowns. However, incorporation of computerized and modern electrical control systems shall offer high degree of smooth and continuous operation. Sensors and other devices for indicating maintenance requirements and unsafe conditions may be an integral part of an electrical control system. After a close inspection of trouble-shootings in belt conveyors, our technical expertise offers the best remedies to these problems. Listed below are some of the common complaints which often occur during conveyor belt operation followed by causes and their cure.
1. Ply seperation in conveyor belt :-
Causes Cures
(a) Excessive tension on belt. Use vulcanised splice.
(b) Carcass exposed to moisture and foreign materials due to cuts. Make spot repairs and enclose belt line to protect the belt against sun and rain.
(c) Pulley diameter may be small. Pulley diameter should be increased.
(d) Oil ingression in the carcass. Avoid over lubricating the idlers.
(e) Worn-out belt edges. Repair belt edges immediately.
2. Top cover swells in spots, becomes brittle wears, rips, gouges, ruptures, tears, develops grooves or cracks :-
Causes Cures
(a) Abrasive materials, acids, oils and heat damages the belt covers. Use belt designed for specific purpose only. Ensure quick repairs. Enclose belt line.
(b) High material impact on belt and/or splices. Correctly designed feeding chutes and baffles should be used. Load fine material first which will provide uniform cushion and decrease impact of large lumps on belt covers. If neccessary apply breaker ply. Install impact idlers.
(c) Material accumulation. Provide cleaning devices, scrapers, and inverted 'V' decking. Ensure proper workng of these devices while conveying slurry, sticky and hot material.
(d) Improper loading, spillage or incorrect relative loading velocity. Control the flow and direction of the material on the belt. Regulate belt speed. Feed should be centred on the belt.
(e) Improper placements of skirts. Install skirt boards so that they do not rub against belt.
3. Belt slip, excessive bottom cover wear, or development of longitudinal cracks :-
Causes Cures
(a) Jammed idlers. Lubricate the idlers properly.
(b) Belt speed too high Decrease belt speed.
(c) Excessive load on bottom cover Ask for breaker ply on the bottom side.
(d) Material buildup. Install proper cleaning devices.
(e) Running of loose conveyor belt. Increase belt tension. Use grooved and lagged pulleys.
(f) Pulley lagging worn out. Replace or repair pulley lagging immediately. Tighten loose or protruding bolts.
4. Excessive edge wear :-

Causes

Cures
(a) Load impact on belt edges due to improper loading. Apply proper loading tactics.
(b) Off centre running of belt. Increase clearence between belt edge and structure.
(c) Friction between belt edges and structure Use limit switches.
(d) 'Rain Bow' shape of belt due to improper storing facilities. Avoid telescoping of belt rolls. Do not store conveyor belts in damp places.
(e) Grease and oil. Do not over lubricate idlers.
(f) Material spillage at feed points and on the sides along the conveyor length. Proper troughing of the belt. Avoid sudden on-off of belt movements. Ensure periodic cleaning of structure from spilled material.
5. Belt breaks at spliced joint :-
Causes Cures
(a) Improper vulcanised splice or wrong mechanical fasteners. Make a new splice and retighten the fastener.
(b) Excessive tension on belt. Replace fasteners with vulcanised splice and readjust tension.
(c) Too small pulley diameters. Increase pulley diameters.
(d) Drive under belted. Recalculate maximum load on belt and make proper belt replacement.
(e) Excessive wear at joints due to material buildup. Ensure periodic cleaning of system.
6. Excessive belt stretch:-
Causes
Cures
(a) Due to excessive tension Adjust counterweight properly and reduce belt tension

7. Off-centre running of belt:-
Causes
Cures
(a) Idlers or pulleys out of square with centre line of conveyor. Realign and install limit switches.
(b) Improper placement of idlers or large idler spacing. Locate idlers correctly and reduce idler spacing.
(c) Side loading. Load in the centre of the belt.
(d) Off shape belt and unbalanced belt weight per cross-sectional width. Avoid telescoping of belt rolls. Do not store the belt in damp conditions. Make proper splicing. Repair worn out edges.
(e) Material spillage on sides of the belt. Make proper feed arrangements. Adjust belt speeds accordingly. Provide skirt boards if necessary. Install cleaning devices.
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BELT RANGE
Conveyor Belts offer a wide range of variety in cotton/ cotton, cotton/ nylon, and nylon/ nylon Fabrics reinforced with top quality Rubber Blends.

Width Range (mm) 200, 250, 300, 350, 400, 450, 500, 550, 600, 650, 700, 750, 800, 850, 900, 950, 1000, 1050, 1100, 1150, 1200
(Apart from these we can also make as per customer's specifications)
Belt Construction (Plies) Cotton/ cotton - 2 to 9
Cotton/ nylon - 2 to 7
Nylon/ nylon - 2 to 5
Cover Thickness Top cover - 1mm to 10mm
Bottom cover - 1mm to 5mm
Carcass

Straight Ply
Stepped Ply
Reversed Stepped Ply
Hilock edge construction

Belt ends Open or Endless
Belt Edges Cut edge/ Fortified edges
Cover Grades M-24, N-17, HR, SHR, OR, HYGENIC
Breaker Ply Breaker on edges, Breaker on face or back, all breaker ply construction.
Mildew Inhibition To protect cotton/ cotton Belt edge from moisture, fungus & moulds.
Skim Coating For better inter ply and cover to ply reinforcement, for added flexibility, improved impact resistance.
Rough Top For packed material, providing desired friction between belt & conveyed material, avoids slipping and roll backs.
belt range performance guidelines types of conveyor belts

Note : Apart from these we also manufacture as per customer's specifications.

Contact us:-  Indra Belting Company,

                           chhipitola, Agra-282002(U.P.),

                            India.

E-Mail            IBC@Sancharnet.in

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