company news about 3MM Twin Screw Floating Fish Feed Pellet Making Machine Test

Testing a 3mm Twin screw floating fish feed pellet extruder machine is a high-precision process. Because 3mm dies create significant backpressure, achieving a 95%+ floating rate requires a perfect balance of starch gelatinization, moisture control (25-28%), and temperature management (120°C-150°C). This guide outlines the professional testing protocols to ensure commercial-grade feed production.

700-950kg/h Wet-type Twin screw floating fish feed pellet extruder machine test

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1. Why the 3MM Pellet Test is Critical for Aquaculture

The 3mm pellet is a "universal size" used for tilapia, catfish, carp, and koi, particularly in the transition from juvenile to adult stages. However, small-diameter extrusion is technically demanding.

A formal production test verifies:

• Starch Gelatinization: Ensures digestibility and buoyancy.

• Structural Integrity: Prevents the pellets from dissolving too quickly (Water Stability).

• Physical Uniformity: Crucial for automated feeding systems and marketability.

2. Technical Parameters for 3MM Extrusion (Expertise)

To achieve high-quality results, our engineering team recommends the following baseline parameters during the test:

3. The Step-by-Step Testing Workflow

A professional test follows a logical sequence to ensure machine stability.

Phase 1: Pre-Test Preparation

• Die Inspection: Ensure the 3mm die holes are polished and free of burrs.

• Pre-heating: The extruder barrel must reach the target temperature (approx. 100°C) before the material is introduced to prevent "cold slugging" or jamming.

Phase 2: The Extrusion Process (Twin-Screw Advantage)

Unlike single-screw models, the twin-screw system uses intermeshing screws to provide:

• Positive Displacement: Forced transport of oily or high-moisture formulas that would slip in a single-screw machine.

• Self-Cleaning: Reduces downtime and prevents material buildup in 3mm holes.

Phase 3: Cutting & Shaping

For 3mm pellets, the cutter speed must be synchronized with the linear discharge speed. If the cutter is too slow, the pellets become "logs"; if too fast, they become "flakes."

Phase 4: Post-Extrusion Drying (The Often Missed Step)

Expert Note: Floating performance cannot be accurately judged immediately out of the extruder. Pellets exit at ~20% moisture. They must be dried to below 10% in a multi-layer dryer to fix the internal air-cell structure, ensuring they stay buoyant for 6+ hours.

4. Key Quality Indicators (KPIs) to Evaluate

During the test, use this checklist to verify performance:

1. Floating Rate (>95%): Place 100 pellets in a beaker. After 2 hours, 95+ should still be at the surface.

2. Expansion Ratio (1.5x - 2.0x): A 3mm die should produce a pellet with a diameter of roughly 4.5mm to 5mm due to expansion.

3. SME (Specific Mechanical Energy): Monitor the motor load. Stable SME indicates a consistent cook and high-quality pellet.

4. Water Stability: The pellet should maintain its shape in water for at least 2 to 4 hours without leaching nutrients.

5. Troubleshooting Common 3MM Production Issues

Based on years of field experience, here is how to solve common test failures:

• Issue: Pellets are sinking.

  • Solution: Increase the extrusion temperature or reduce the moisture slightly to encourage more "flash evaporation" as the pellet exits the die.

• Issue: Uneven pellet lengths.

  • Solution: Check for inconsistent feeding (bridging in the hopper) or wear on the cutter blades.

• Issue: Surface is rough or "hairy."

  • Solution: Improve the grinding fineness of the raw materials. Large fibers cannot pass cleanly through a 3mm hole.

6. Comparison: Twin-Screw vs. Single-Screw for 3MM Production

7. FAQ: 

Q: Can I produce both floating and sinking feed with a Twin screw floating fish feed pellet maker machine?
A: Yes. A Twin screw floating fish food maker machine is highly versatile. By adjusting the screw configuration, moisture levels (increasing to 30%+), and lowering the barrel temperature, you can produce high-quality sinking pellets. For floating feed, you need higher heat and lower moisture.

Q: What is the ideal fish species for a 3mm pellet size?
A: 3mm pellets are the "gold standard" for mid-stage growth. They are ideal for:

• Tilapia & Catfish: 100g to 500g body weight.

• Carp & Grass Carp: Juvenile to sub-adult stages.

• Ornamental Fish: Adult Koi and large Goldfish.

Q: What is the electricity consumption for a 3mm Wet-type Twin-Screw floating fish feed extruder machine?
A: Power consumption varies by capacity. Generally, a Wet-type Twin screw floating fish  machine is 20% more energy-efficient per ton than a single-screw because the dual-screw action requires less external heating once the steady-state production begins. Specific kW ratings depend on your hourly output (e.g., 200kg/h vs. 1000kg/h).

Pub Time : 2026-06-09 14:37:50 >> News list