Sinking Fish Feed Extruder vs Small Fish Pellet Mking Machine: Lifespan Comparison
January 21, 2026
The core correlation between lifespan and operating conditions is that floating feed making machines primarily use mechanical extrusion molding, operating under relatively mild conditions (temperature ≤80℃, pressure ≤2MPa). Core components (ring die, pressure rollers) wear relatively slowly, and with normal maintenance, their lifespan can reach 5-15 years. Floating feed extruder machines, on the other hand, must withstand high temperatures and pressures (temperature 120-160℃, pressure 3-6MPa). The intense friction between the screw and barrel, along with the high-temperature reaction of the material, easily leads to corrosion and wear of components. The lifespan of core components is only 3-5 years, and the overall machine lifespan is approximately 8-12 years, 20%-30% shorter than pellet mills. This difference stems from their functional positioning: dry dog food making machines emphasize molding, while extruders emphasize physicochemical modification, resulting in drastically different levels of operational severity.
The difference lies in the wear characteristics of core components. The most vulnerable parts of a pellet mill are the ring die, pressure roller, and cutter. Replacement costs are relatively low (accounting for 10%-15% of the total machine cost), but the replacement cycle is longer (3-6 months). The most vulnerable parts of a dog food extruder machine are the screw, barrel, and die head. Because these parts need to withstand high temperatures, high pressures, and intense friction, the material requirements are higher (mostly alloy materials). Replacement costs account for 30%-40% of the total machine cost, and the replacement cycle is shorter (1-3 months). When both are used together, if worn parts in the extruder are not replaced in time, it will lead to uneven output and impurities in the material, indirectly accelerating the wear of the pellet mill's ring die and pressure roller, and shortening the pellet mill's lifespan.
Differences in maintenance requirements and lifespan extension. Maintenance of a floating fish feed pellet making machine focuses on cleaning, lubrication, and precision calibration. The process is relatively simple, and daily maintenance costs are low. Maintenance of a pet food extruder machine requires additional attention to high-temperature sealing, component thermal expansion and contraction calibration, and cleaning of burnt materials. Maintenance frequency is higher (e.g., daily die head cleaning and weekly seal inspection), and maintenance costs are approximately 1.5-2 times that of a pellet mill. If the extruder is not properly maintained and malfunctions, the pellet mill will be forced to shut down. Long-term idleness or load fluctuations will also affect the service life of the pellet mill. Therefore, a collaborative maintenance mechanism between the two is necessary.
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