Proper routine maintenance of fertilizer coating machines can reduce downtime and extend the coating machine life, with particular attention paid to key components.
First, maintain the conveyor belt. Fertilizer pellets easily accumulate. After daily downtime, clean the conveyor belt surface with a soft-bristled brush, especially around the edges to prevent residual pellets from clumping and scratching the belt coating. Check the conveyor belt tension weekly. If slippage occurs, adjust the tensioner immediately. Also, check the conveyor belt joints for cracks. Repair any cracks promptly to prevent uneven conveying and film shifting. For coating machines that frequently handles high-humidity pellets, apply anti-rust lubricant to the conveyor belt bearings monthly to prevent rust and seizure.
Second, clean the heat seal assembly. The heating tubes in the heat-sealing tunnel are prone to film residue. Wipe them every three days with a heat-resistant cloth. If the residue is hard, gently clean it with a small amount of alcohol. Be careful not to scratch the surface of the heating tube with hard objects to prevent damage to the temperature control sensor. Check the sealing performance of the heat-sealing tunnel weekly. If the tunnel door seal strips are deteriorating, replace them promptly to prevent heat loss that affects the heat seal and reduce energy waste.
Third, inspect the cutting blade. Check the cutting blade for sharpness weekly. If burrs appear, sharpen them with a whetstone at a 45° angle to ensure a smooth cutting edge. Also, clean the cutting blade holder to prevent film debris from getting stuck and causing deviations in cutting dimensions, which could affect packaging consistency. Check the cutting blade’s fixing screws monthly for looseness. Tighten them immediately if loose to prevent blade deviation during cutting, which could pose a safety hazard.
