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Competition's Cross Rigidity
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Our competitors all use monofilament cross-rigid plies throughout their tension ranges. Monofilament plies experience sag problems at the downturn deflection wheel on high lift, S-shaped conveyors with wide belts and heavy sidewalls (Shown Below).
As the belt sags, an extreme amount of pressure is placed on the monofilament ply at the edge of the deflection wheel. This stress results in the monofilament cross-rigid ply stretching at this point. The stretch creates greater sag and more stress. This snowballing effect results in sidewall separation and the inner edge of the deflection wheel abrading through the belt cover into the fabric until splice failure occurs. Once the belt reaches this point, it cannot be repaired.
Not only does Beltwall's greater cross rigidity negate this stress at the downturn deflection, but we also use fiberglass plies in the BWX3332, BWX4442, and BWX5552 belt where the downturn force is great enough to create this sag. Fiberglass does not stretch under stress.
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Most of our competitors cold bond their cleats to the base belt. The anticipated adhesion for cold bonded rubber to rubber is approximately 40 to 45 PIW. Beltwall hot vulcanizes cleats to the base belt. Anticipated adhesion due to hot vulcanizing is 80 to 100 PIW. Therefore, Beltwall's cleats can absorb over twice as much impact at the loading section as cold bonded cleats.
Rubber cleats can be used successfully when subjected to the impact of loading large lumps and the pressure of elevating heavy materials at steep inclines only to a certain cleat height. Therefore, Beltwall uses a 90 Shore A durometer urethane cleat bolted into a rubber cleat base hot vulcanized into the base belt at heights 5 1/2" and higher depending on the material, tonnage, and incline angle.
Competitors use all rubber cleats at all heights and just expect their customers to accept shorter life on higher cleats.
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PHOTOS:
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Competition's cleats break down over time. Beltwall cleats maintain their integrity.
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