Conveyor belt splice failure is one of the most common causes of unplanned downtime in bulk material handling systems.
In most cases, failure does not occur due to belt specification alone, but due to issues in preparation, installation, or operating conditions.
Common causes of splice failure
Inadequate belt preparation
If the belt is not correctly stripped and cleaned, contamination can prevent proper bonding between layers.
Incorrect vulcanising parameters
Improper heat, pressure, or curing time during hot vulcanising can result in weak bonding within the splice.
Poor ply stepping
Uneven or inconsistent ply separation leads to uneven load distribution across the splice.
Misalignment and tracking issues
A belt running off-centre places additional stress on one side of the splice, leading to premature edge failure.
Excessive load or impact
High impact zones, particularly at transfer points, can overload the splice beyond its design capacity.
Prevention
- Correct splice design based on belt specification
- Controlled vulcanising conditions
- Accurate alignment of the conveyor system
- Regular inspection of high-wear areas
Splice failure is rarely caused by a single issue. It is typically the result of installation quality combined with operating conditions. Addressing both is essential to achieving long-term reliability.




