5 Common Problems with Small Fish Feed Extruder Machines

Common Problem 1: The small fish feed pellet making machine is clogged, preventing raw material from being discharged. The core reason is that the raw material moisture content is too high (above 15%) or the die orifice diameter is too small. Solution: Immediately disconnect the power and allow the machine to cool. Use a special cleaning rod to clear the blockage from the die end in reverse. Re-dry the raw material to reduce the moisture content to 12%-15%. If the die orifice diameter is too small, replace it with a die with a slightly larger diameter (e.g., from 1mm to 2mm). Prevention Tips: Strictly test the moisture content of the raw material before production. Maintain a uniform feeding speed and avoid pouring in too much raw material at once.

Common Problem 2: Pellets are not formed, loose, and brittle. This is mainly due to insufficient temperature (below 120℃) or insufficient pressure in the small fish feed making machine. Solutions: 1. Extend the preheating time of the extruder to 15-20 minutes to ensure the temperature stabilizes at 120-140℃; reduce the feed rate (e.g., from 10kg/h to 5-8kg/h) and increase the pressure in the extrusion chamber; appropriately increase the screw speed (from 300r/min to 350r/min) to increase frictional heat generation. If the problem persists after these adjustments, check for wear on the extruder screw; replace it promptly if severely worn.

2. Common Problem 3: The finished product has a burnt smell and is black in color. This is due to the small fish feed maker machine temperature being too high (above 160℃) or the screw speed being too slow. Solution: Immediately lower the temperature to 130-140℃. If the temperature cannot stabilize, check if the temperature controller is malfunctioning and repair it promptly; increase the screw speed to 350-400r/min to shorten the residence time of the raw material in the extrusion chamber. Simultaneously, clean the burnt residue inside the extruder to avoid contaminating subsequent raw materials.

3. Common Problem 4: Uneven particle size. The main problem is a mismatch between the cutter speed and the output speed of the pet food extrusion equipment machine, or uneven wear of the die head orifice. Solutions: Adjust the cutter speed; increase the cutter speed if the output speed is fast. Check the die head orifice; if severe wear causes uneven orifice diameters, replace the die head promptly. Ensure a stable feeding speed and avoid fluctuations in the output speed.

Common Problem 5: Finished product is prone to mold. This is due to incomplete post-processing drying or improper storage. Solutions: Cool the extruded granules to room temperature, then dry them with a hot air gun at a low temperature, ensuring the moisture content drops below 12%. Pack them in sealed bags with desiccant and store them in a dry, ventilated place, avoiding humid environments.

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