Insufficient preheating or inadequate preheating temperature is a common operational error causing small fish feed pellet extruders to shut down immediately after startup. For the extruder to operate normally, the extrusion chamber temperature needs to be stable at 120-140℃. If preheating is not performed or the preheating time is too short (less than 10 minutes), the extrusion chamber temperature will be too low, preventing the raw material from softening quickly enough. This will lead to a sharp increase in pushing resistance, causing the equipment load to instantly exceed the rated value, triggering overload protection and shutdown. For example, many beginners, eager to start production, immediately feed material after turning on the equipment without waiting for the temperature to stabilize, which easily leads to this situation. Furthermore, if a no-load test run is not performed during preheating, potential problems such as screw jamming cannot be detected in time, which may also lead to immediate shutdown after feeding.
Improper parameter settings, especially a mismatch between the feeding speed and screw speed, are a core reason for extruder shutdowns during operation. The feed rate and screw speed of the extruder need to be precisely matched according to the raw material formula and production capacity requirements. If the feed rate is too fast, far exceeding the screw's pushing capacity, the raw material will accumulate in the extrusion chamber, causing the load to continuously increase and eventually leading to shutdown. If the feed rate is too slow, the screw idling ratio will increase, potentially resulting in insufficient pressure in the extrusion chamber, failing to form a stable maturation environment, and possibly causing abnormal equipment vibration, indirectly triggering shutdown. For example, when producing high-protein fish feed, if the feed rate is not reduced and the screw speed is not increased, the machine may shut down due to difficulty in pushing the raw material and excessive load. In addition, abnormal temperature parameter settings, such as excessively high temperatures causing the raw material to scorch and clog, or excessively low temperatures causing the raw material to stick together, will also cause shutdown.
Other improper operations can also cause the small fish feed maker machine to shut down, such as suddenly and frequently adjusting parameters, or restarting without cleaning after a feeding interruption. For downtime caused by operational and parameter issues, the solutions are as follows: Strictly adhere to the preheating procedure. For small mini extruders, preheat for 10-15 minutes; for large industrial extruders, preheat for 20-30 minutes. After ensuring temperature stability, conduct a 5-10 minute no-load test run before starting feeding. Precisely match the feeding speed and screw speed. Based on the raw material type and production capacity requirements, refer to the equipment manual to set basic parameters, and then gradually optimize through trial production to avoid frequent and significant parameter adjustments. If downtime is caused by improper parameters, first disconnect the power, clean any residual raw materials inside the equipment, readjust the parameters, and then restart. Establish standardized operating procedures and train operators to ensure they master parameter settings and emergency handling techniques.
About Us
Customer visit
Certificate of Honor
Your message must be between 20-3,000 characters!
English
