FABRIC-RUBBER CONVEYOR BELTS, GENERAL PURPOSE

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Simon Richards
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FABRICRUBBER CONVEYOR BELTS, GENERAL PURPOSE APPLICATION Rubber fabric conveyor belts for general purpose are used for transport of loose materials where particular requirements

These belts are used in almost all branches of industry, agriculture, construction and locations where fire hazard does not occur.

General purpose fabricrubber belts are applied to convey materials of any grade of granulation but considering safety of conveyor and belt it is recommended to transport materials

5ply fabric and rubber carcass, rubber top and bottom covers and rubber edges. A layer of carcass rubber is placed between textile plies.

1 FABRICRUBBER CONVEYOR BELTS, GENERAL PURPOSE APPLICATION Rubber fabric conveyor belts for general purpose are used for transport of loose materials where particular requirements towards working conditions and properties of conveyed materials do not apply. These belts are used in almost all branches of industry, agriculture, construction and locations where fire hazard does not occur. The belts may be employed for transport of stones, gravel, sand, cold clinker, neutral chemicals, coke, crops, construction materials and others. General purpose fabricrubber belts are applied to convey materials of any grade of granulation but considering safety of conveyor and belt it is recommended to transport materials up to 300 [mm] diameter of the grain. STRUCTURE Rubber fabric conveyor belts for general purpose are composed of 2.5ply fabric and rubber carcass, rubber top and bottom covers and rubber edges. A layer of carcass rubber is placed between textile plies. Rubber fabric conveyor belts for general purpose are made of (polyesterpolyamide) or PP (polyamidepolyamide) fabric plies. Rubber fabric conveyor belts for general purpose are produced in accordance with EN ISO 4890 or DIN 22 standards. The covers and edges may be manufactured in different classes of rubber; acc. to TABLE. All Rubber fabric conveyor belts for general purpose comply with antielectrostatic conditions specified for safety category acc. to EN 2882 standard. p. /5

2 BELT SYMBOLS USED FOR THE PURPOSE OF ORDERS ACC. TO EN ISO 4890 STANDARD H Where: Completion acc. to standard Quantity of the belt [m] Width of the belt [mm] Ply material Strength of the belt (type) [N/mm] Number of plies in the carcass Thickness of the covers: top (S) and bottom (S 2) [mm] Class of rubber covers Safety category acc. to EN 2882 BELT SYMBOLS USED FOR THE PURPOSE OF ORDERS ACC. TO DIN 22 STANDARD DIN 22 / 4 5/2 Y Where: Completion acc. to standard Width of the belt [mm] Ply material Strength of the belt (type) [N/mm] Number of plies in the carcass Thickness of the covers: top (S) and bottom (S 2) [mm] Cover rubber class TABLE. Physical and mechanical properties of cover rubber for rubber fabric conveyor belts for general purpose Parameter Acc. to EN ISO 4890 Unit H D D60* Requirements for cover rubber Acc. to DIN 22 L W Y Y60* Testing method Z Tensile strength, min. TS [MPa] Elongation, min. Eb [mm3] ISO 4649 (method A) Abrasion resistance, max. Quick heat ageing resistance, in air, at: +70 [ C] after 68 [h.], max. TS Eb ISO 88 (method B) Testing is completed acc. to current standards *The cover with higher abrasion resistance. p. 2/5

3 BELT THICKNESS BELT WEIGHT TABLE 2 shows approximate thickness of carcasses used TABLE 2 shows approximate weight of carcasses for rubber S = S3+ (S + S2) M = m + *( S + S2) for rubber fabric conveyor belts for general purpose. Approximate total thickness of a belt containing covers of any thickness may be calculated from the following equation: fabric conveyor belts for general purpose. Approximate weight of a belt containing covers of any thickness may be calculated from the following equation: where: S S3 S S2 where: M approximate weight of the belt [kg/m2] m weight of the belt carcass taken from Table 2 for specific approximate total thickness of belt [mm] thickness of the belt carcass taken from TABLE 2 [mm] thickness of top cover [mm],s minimum value is 2 [mm] thickness of bottom cover [mm],s2 minimum value is 2 [mm] type of the belt, is 2 [kg/m2] S thickness of top cover [mm], S minimum value is 2 [mm] S2 thickness of bottom cover [mm], S2 minimum value is 2 [mm] value depending on the type of the belt: for top cover, class H,, D60, Y60,2 [g/cm3] for top cover, class D and W,5 [g/cm3] for top cover, class L and Z,55 [g/cm3] for top cover, class Y,4 [g/cm3] TABLE 2. The range of manufactured belts including standard width, weight and thickness of carcasses for rubber fabric conveyor belts for general purpose. Type of the belt/number of plies /3 /3 /3 /4 /3 /4 /5 /3 /4 /5 /3 /4 /5 /4 600 /4 600 /5 /4 /5 0 /4 0 /5 2 /4 2 /5 Standard width of the belt [mm] Approximate thickness of the carcass S3 [mm] PP 3,6 3,6 4,5 4,2 4,8 5, 4,8 5,6 5,4 5, 7,0 6,9 6,3 7,2 6,4 8,4 9,2 8,4 9,0 9,6 0,4 0,5 0,5 9,6 0,4 0,5 2,8,2 3,0 3,0 Approximate weight of the carcass [kg/m 2] PP 4,9 4,9 5,4 5, 6,5 5,8 5,5 7,2 8,2 6,5 7,8 7,0 9,0 8,3 8,7 7,4 9,7 8,8 0,3 8,0, 0,0 0,9 0,0 2,9 2,5 3,9 2,5 4,5 2,8 5,5 4,4 Types and width of the belts, other than determined in Table 2, shall be agreed with manufacturer. p. 3/5

4 MINIMUM DIAMETERS OF PULLEYS acc. to TABLE 3 TABLE 3 shows recommended minimum diameters of drums [mm] for belts specified in accordance with DIN 2: A drive pulleys and other pulleys in the range of high belt tensions B deflection pulleys and other pulleys in the range of low belt tensions C snub pulleys (change in belt moving direction 30 ) TABLE 3. Minimum drum diameters [mm] Type of the belt/number of plies /3 /3 /3 /4 /3 /4 /5 /3 /4 /5 /3 /4 /5 /4 600 /4 600 /5 /4 /5 0 /4 0 /5 2 /4 2 /5 A Carcass B C A PP Carcass B C MARKING OF BELTS Typically, durable stamp in the form of relief is impressed in rubber material of the belt cover at the distance of 3 [m] from the beginning and the ending of the belt and approximately each 5 [m] acc. to EN ISO 4890 or approximately each 0 [m] acc. to DIN 22. The stamp includes required information acc. to EN ISO 4890 or DIN 22 standards. Durable stamp includes following information: acc. to EN ISO 4890: name (mark) of the manufacturer, name of the standard, type of the fabric, type of the belt, number of the plies, class of the rubber, safety category, the belt serial number, two digits of the year of manufacture. acc. to DIN 22: name (mark) of the manufacturer, number of the standard, type of the fabric, type of the belt, number of the plies, class of the rubber, the belt serial number, two last digits of the year of manufacture. PACKAGING Typically, the belt is wound on [mm] diameter wooden coil which has an internal square hole with 230 [mm] cheek. Wound belts are protected against unwinding during transport by wrapping with polypropylene tape. p. 4/5

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