Why is there abnormal noise in my fish food pellet making machine?

 

 

When the fish food pellet machine is running, it may suddenly make "abnormal noises" - a "clicking" metallic clanging sound from the gearbox, a "sharp friction" sound between the screw and the barrel, and a "clunking" sound from the die head. These sounds not only make the operators uneasy, but also indicate that there is serious wear or jamming in the equipment parts. If not dealt with in time, it may cause the parts to be scrapped within a few hours (such as broken gear teeth or broken screw).

 

 

1.Gearbox abnormal noise ("clicking" or "humming")

 Causes: Insufficient gearbox lubricating oil (oil level below 1/4 of the oil gauge) or deteriorated lubricating oil (decreased viscosity, presence of metal shavings), leading to dry friction of the gears. Excessive meshing clearance after tooth surface wear results in a "clicking" impact sound during operation. Metal impurities (such as bearing ball fragments) mixed into the gearbox impact the gearbox housing as the gears rotate, producing a "humming" vibration sound. Worn gear shaft bearings (clearance exceeding 0.5mm) cause gear misalignment and poor meshing.

 

 Solutions: After stopping the machine, check the gearbox oil level and quality. If insufficient, add No. 46 low-temperature anti-wear gear oil to 1/2-2/3 of the oil gauge. If deteriorated, completely drain the old oil, clean the gearbox with diesel fuel, and then add new oil. Disassemble the gearbox, clean internal impurities, and inspect the gear teeth. If wear exceeds 20% or broken teeth are present, replace with high-strength alloy steel gears. Replace worn gear shaft bearings, ensuring bearing clearance is ≤0.2mm.

 

 

2. Screw and barrel abnormal noise ("friction sound", "thumping sound")

 Causes: Screw thread wear (thread thickness reduced by more than 2mm), excessive clearance between the screw and barrel, uneven force during material extrusion, producing "vibration noise"; metal blocks (such as bolts, nails) mixed in with the barrel, pushed by the screw and impacting the inner wall of the barrel, producing a "thumping" sound; deformation of the screw and barrel due to excessive temperature (above 150℃), scraping against each other during operation, producing a "harsh friction sound".

 

 Solutions: Disassemble the screw and check the thread wear. If the wear is severe, replace the screw with a nitrided screw (hardness of HV900 or higher); install a strong magnetic separator (magnetic force ≥12000 Gauss) at the raw material hopper outlet and regularly clean the adsorbed metal impurities; check the barrel heating device. If the temperature is out of control, replace the temperature controller to ensure the barrel temperature is stable within the set range (not exceeding 140℃) to prevent component deformation.

 

 

 

3.Abnormal noise from the die head ("clunking" or "squeaking")

 Causes: Excessive blockage in the die head orifice (blockage rate exceeding 40%) causes fluctuating pressure during material extrusion, resulting in a "clunking" sound; damaged die head heating coil (partial non-heating) leads to uneven heating of the material within the die orifice, causing hardening and blockage, resulting in poor material extrusion; loose bolts connecting the die head and barrel cause the die head to wobble and collide with the barrel, producing abnormal noise.

 

 Solutions:
1. Use a special cleaning needle to unclog the die orifice (for severe blockage, soak the die head in 80℃ warm water for 30 minutes to soften residual material before cleaning);
2. Check the die head heating coil by measuring the resistance with a multimeter. If the resistance is infinite (heating coil is burnt out), replace it with a heating coil of the same power (e.g., 2kW/220V);
3. Tighten the die head connecting bolts diagonally (torque as required by the equipment manual, e.g., 80-90 N·m for M16 bolts) to ensure a tight fit between the die head and barrel.

 

 

 

MIKIM boasts extensive experience in poultry feed pellet production lines, significantly reducing the incidence of poultry diseases. Its equipment is not only widely used across various industries domestically but also exported to Southeast Asia, Europe, Africa, and South America, earning a high reputation internationally. This global presence not only demonstrates the adaptability and competitiveness of its products, but also demonstrates the company's experience in adapting to diverse market standards and logistics conditions, enabling it to provide a stable supply chain for its overseas customers. Whether serving large domestic farms or cross-border feed companies, MIKIM can leverage its global service network to ensure a consistent, high-quality experience.

 

For more information on process flow design, equipment layout, factory construction plans, individual equipment pricing, or turnkey project proposals, please feel free to contact us!!!

 

 

 

1. What is the price of the fish feed maker machine?

The price ranges from approximately $3,000-$22,000

2. Do you provide maintenance services for your customers?
Yes, we offer comprehensive after-sales maintenance services to our customers.

 

 

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