Because of the adaptability, most of the rubber used to create modern-day conveyor belting is synthetic. Due to the technical difficulties and higher price of generating a synthetic rubber compound that can flow uniformly, the vast majority of chevron conveyor belts are effectively ready using a two-stage vulcanization procedure. Firstly, a belt corpse consisting of layers of fabric strengthening ply and shielded by a layer of uncured rubber complex on the top and bottom surfaces can place in a vulcanization press. You can fill a mold plate with uncured rubber at a similar time, and the base structure can then place on top of the filled mold. Otherwise, you can extract the mold plate, fill with uncured rubber, and then replace it under the base structure. In both circumstances, you can vulcanize the complete system to create the finished belt.
Constant flexing can source dynamic stress fractures in conventionally created chevron belts.
The critical issue is that the uncured rubber compound used to create the base belt structure is not the same as the compound used to plug the molds. It is due to the rubber used in the molds to produce the actual chevron profiles has to be more flexible than the rubber used on the top and bottom shield surfaces that it can fill the mold cavity.
However, it directly creates the ‘Achilles heel’ of all chevron belts ready in this way. The connection point where the two different rubber compounds link then becomes a point of fault. The chevron belts constantly stretch and flex under tension every time they run around the pulley or drum.
Without the bond between the base conveyor belt carcass and the chevron, the profile is entirely flawless then sooner, or later vigorous stress fractures in shape may start to occur, causing the belt to split. Especially on conveyor belts conveying hard, heavy lumps of material, the continuous impact weakens the joint between the base belt and the chevron belt. Either way, eventually, the chevron may part company with the rest of the conveyor belt.
You can magnify the problem significantly on conveyors with relatively small pulley diameters, especially mobile equipment. The smaller pulley has, the higher the dynamic stress. Failure can happen even sooner if one or both of the rubber compounds used are not entirely resistant to the effects of degradation surface cracking formed by chemical reactions in the rubber produced by ground-level ozone and ultraviolet light.
Chevron conveyor belts as high as 25mm or 32mm can wear almost entirely flat quickly.
You can have it use a sufficiently malleable rubber so that it can fill the mold cavities and accept the dynamical strains of conveyor belt operation often creates a second key ‘belt life-threatening’ weakness.
Research and experience have exposed that the rubber used to create the chevrons in the conventional two-step production method almost invariably has lower resistance to abrasive wear than usually is acceptable. It is usual, especially among ostensible ‘economy’ belts imported from Asia, that chevrons as high as either 25mm or 32mm can wear almost entirely flat in an oddly short time.