What causes abnormal temperature in a small floating fish feeder? - Knowledge

content

Abnormal temperatures in floating fish food extruders are mainly categorized into two types: excessively high temperatures (above 160℃) and excessively low temperatures (below 120℃). Typical symptoms of excessively high temperatures include blackened feed pellets and a burnt smell. In severe cases, it can lead to die blockage and equipment shutdown. Causes include a malfunctioning temperature control system, excessively slow screw speed, and excessively fast feeding speed. Troubleshooting steps: First, observe whether the temperature displayed on the temperature controller matches the actual temperature in the extrusion chamber. An infrared thermometer can be used to detect the temperature of the outer wall of the extrusion chamber. If the temperature controller displays an abnormality, it indicates a sensor or temperature controller malfunction. If the temperature controller is normal, check the screw speed and feeding speed to see if there is a problem of excessively low speed or excessively fast feeding, resulting in excessively long raw material residence time. Solutions: Repair or replace the faulty temperature sensor or temperature controller; increase the screw speed (adjust from 300 rpm to 350-400 rpm in small fish feed maker machines), reduce the feeding speed, and ensure that the raw material residence time in the extrusion chamber is controlled within 2-5 seconds.

For small floating fish feed pellet machines, excessively low temperatures manifest as loose, brittle feed pellets and insufficient gelatinization (starch gelatinization rate below 80%). Causes include insufficient preheating, heating device malfunction, and excessively high raw material moisture content. Troubleshooting begins with checking the heating device's operation and observing if the heating element is heating up. If the heating device is normal, verify the preheating time: 10-15 minutes for small home-use dog food making machines and 20-30 minutes for large industrial extruders. Ensure the temperature stabilizes before feeding. If both preheating and heating are normal, check if the raw material moisture content is too high, as excessive moisture will absorb a large amount of heat, preventing the temperature from rising. Solutions include repairing or replacing the heating element; extending the preheating time to ensure the temperature stabilizes at 120-140℃ before feeding; and drying the raw material to reduce moisture content to 12%-15%.

For small fish feed pellet extruders, abnormal pressure manifests as a sudden increase or excessive fluctuation in the extrusion chamber pressure, leading to unstable output and uneven pellet formation. Sudden pressure increases are often caused by die blockage or abnormal raw material moisture content. Troubleshooting methods are similar to those for blockage and moisture detection. Excessive pressure fluctuations are usually caused by unstable feed rate or screw wear. Solutions include: ensuring a uniform feed rate and avoiding frequent adjustments; checking screw wear and replacing it if the screw threads are severely worn; and regularly cleaning the die to prevent blockages that could cause sudden pressure changes. It is recommended to install a pressure sensor in the extrusion chamber to monitor pressure changes in real time. If the pressure exceeds 5 MPa, immediately stop the machine for troubleshooting to prevent the problem from escalating.

Related equipment

A Buyer's Guide to Selecting a floating fish feed pellet making machine Structure of a Fish Feed Extruder Machine What Makes a small fish feed pellet making machine Suitable for Home Use?

about Us

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