Preliminary Preparation: Equipment Debugging and Raw Material Readiness
Before starting the machine, check the wiring and lubrication system of the wet fish feed production equipment to ensure there are no loose connections or leaks; preheat the extruder to the set temperature (130-160℃ for floating feed, 120-140℃ for sinking feed) to avoid material sticking due to low-temperature feeding; load the pre-treated raw materials into the hopper, ensuring the feeding channel is unobstructed, and prepare the drying or sun-drying tools needed for post-processing.
Extrusion Operation: Precise Parameter Control for Guaranteed Results
After starting the wet fish feed pellet extruder machine, feed at a uniform speed, adjusting parameters according to the feed type: for floating feed, control the pressure at 4-6 MPa and the screw speed at 350-400 r/min to ensure sufficient moisture expansion; for sinking feed, control the pressure at 3-4 MPa and the speed at 300-350 r/min to reduce porosity formation. During the process, sample and test the pellet buoyancy and hardness every 30 minutes, and fine-tune the extruder parameters as needed to prevent pellet scorching and breakage.
Post-Processing: Shaping and Storage Optimization
Immediately after puffing, the pellets should be air-dried or oven-dried at 80-90℃ until the moisture content reaches 10%-12% to prevent moisture absorption and mold growth. After cooling to room temperature, qualified pellets should be screened, and any broken pieces should be returned to the raw material silo for secondary puffing. Seasoning should be done as needed, and the pellets should be sealed and stored in a dry and well-ventilated environment. After operation, thoroughly clean the wet floating fish feed extruder die head and screw to remove any remaining material and extend the equipment's lifespan.
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