How to resolve abnormal noise from a fish feed pellet extruder?

 

 

Motor noise is the core source of noise. Fish feed pellet extruders are mostly small devices, and although the motor power is low, the noise is more noticeable in a confined environment. If the motor emits a high-frequency "piercing" sound, check for foreign objects between the rotor and stator. After cleaning, wrap the motor casing with a layer of sound-absorbing cotton (10mm thick, 30kg/m³ density), and then cover it with a metal protective shell to prevent pets from chewing it. For older motors, replace them directly with DC brushless motors, which operate at 20-30 decibels lower noise than traditional AC motors and are equipped with a soft-start function to avoid the impact noise at startup. When installing the motor, use a flexible bracket connected to the machine body via spring damping components to reduce vibration transmission.

 

Feed friction noise is related to the characteristics of pet food. Extruded pet food often contains meat ingredients, and the surface of the pellets is rough, easily generating friction noise with the feeding trough. A 3mm thick food-grade silicone pad can be attached to the inner wall of the feeding trough, which not only reduces friction noise but also prevents food from sticking together. Adjust the height of the feeder's outlet from 5cm to 2cm above the feeding trough to shorten the feed's falling distance and avoid impact noise from free fall. For automatic quantitative feeders, optimize the discharging sequence by adopting an "intermittent discharging" mode, reducing the amount of feed discharged each time to 1/3 of the original amount, completing the feeding in 3 batches to reduce noise from feed accumulation at a single time.

 

Component resonance noise needs to be addressed through structural optimization. Check the feeder's plastic shell for deformation; deformed areas are prone to resonance. This can be repaired by heating and reshaping, or by attaching counterweights (such as stainless steel sheets) to the resonance points to change the vibration frequency. Install a 5mm thick rubber isolation pad between the feed hopper and the machine body inside the feeder to prevent the hopper's vibration from being transmitted to the outer shell. When placing the feeder, avoid placing it directly on a hard surface or metal frame; instead, place it on a wooden tray or rubber pad to absorb vibration using flexible materials. In addition, regularly clean the inside of the feeder to remove grease and food residue. Grease in pet food easily attracts dust, which increases friction in the transmission parts. Clean the feed hopper and feeding channel weekly with a neutral detergent to ensure smooth operation.

 

 

 

 

 

MIKIM's fish feed pellet production lines and supporting machinery offer excellent value for money. Not only are they affordable, eliminating middlemen markups and allowing small and medium-sized enterprises (SMEs) and fish farmers to purchase complete sets of equipment at reasonable costs, but they also boast exceptional efficiency. The fully automated process, from raw material crushing and precise ingredient mixing to extrusion pelleting and maturation, is completed in one continuous flow. This results in high starch gelatinization rates and uniform pellet formation, significantly improving production efficiency and feed quality, truly achieving "low cost, high output." Choosing a MIKIM fish feed pellet production line means enjoying comprehensive pre-sales and after-sales service, including 24-hour online customer support, a one-year warranty on the entire machine, professional on-site installation, commissioning, and maintenance, and a stable supply of spare parts. Customers can buy with confidence and use with peace of mind, with both excellent value and service quality!

 

Customer visit

 

Certificate of Honor

 

 

If you would like to learn more about MIKIM machinery, please contact us. We offer one-stop service and welcome your inquiries!!!

Contact now