Why Is My Floating Fish Feed Pellet Extruder Machine Not Discharging? Causes and Solutions

 

After the aquatic feed pellet extruder is started, the raw materials are normally fed into the inlet, and the main unit operates normally, but no material is discharged from the die head. In some cases, this is accompanied by an abnormal increase in the main unit current, abnormal noises from the machine chamber, or material backflow and steam leakage at the inlet. After shutdown and disassembly, material clumping and blockage can be seen inside the machine chamber. This phenomenon has the highest incidence in food and feed extrusion production lines, especially after start-up and commissioning or raw material changes, and is an equipment malfunction that requires emergency handling.

 

Why is my Floating aquatic feed pellet extruder not discharging?
The main causes include:

Improper raw material size or moisture

Incorrect temperature, screw speed, or feeding rate

Worn or incorrectly installed components

Auxiliary system failures (steam, lubrication, cooling)

Solution: Stop the machine, clean blockages, adjust raw materials and parameters, and inspect key components.

 

 

👉Fish Feed Extruder: Shutdown, Cleaning & Mold Replacement Tutorial

 

 

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I. Typical Symptoms of No Discharge

Common Signs

Raw materials enter normally, but no output from die head

Abnormal increase in motor current

Unusual noises inside the chamber

Material backflow or steam leakage at the inlet

Blockage and clumping found after disassembly

👉 This issue is especially common during startup debugging or raw material changes.

 

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II. Core Causes of No Material Discharge (Troubleshooting Guide)

1. Raw Material Problems (≈42% of Cases)

Particle size too large or uneven → cannot pass die holes

Moisture too low (<12%) → poor flowability

Foreign objects (metal, stones) → direct blockage

✅ Solution:

Control particle size to 20–40 mesh

Maintain moisture at 12%–15%

Use screening equipment to remove impurities

 

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2. Incorrect Equipment Parameters

Temperature too low (<150°C) → insufficient gelatinization

Improper screw speed → pressure imbalance

Excessive feeding rate → chamber overload

✅ Solution:

Maintain temperature at 150–180°C

Balance feed rate and screw speed

Keep chamber pressure stable (0.3–0.5 MPa)

 

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3. Component Wear or Installation Errors

Worn screw or barrel → weak pushing force

Blocked or improperly installed die head

Motor reverse rotation after maintenance

✅ Solution:

Replace worn parts regularly

Clean die holes frequently

Check motor rotation direction

 

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4. Auxiliary System Failures

Insufficient steam supply → poor material softening

Lubrication failure → increased resistance

Cooling issues → overheating and carbonization

✅ Solution:

Ensure stable steam pressure

Maintain lubrication system

Monitor cooling and temperature balance

 

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III. Emergency Handling Steps (Immediate Fix)

When blockage occurs, act fast:

Stop the machine and cut off power

Close steam valve to prevent hazards

Disassemble die head and clean blockages

Remove clumped material inside chamber

Check motor wiring and rotation direction

Reinstall components securely and restart

 

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IV. Long-Term Prevention Strategies

1. Raw Material Control

Uniform mixing with a vertical mixer

Consistent particle size and moisture

Strict impurity removal

 

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2. Process Optimization

Preheat machine before startup

Use real-time temperature monitoring

Calibrate sensors regularly

 

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3. Equipment Maintenance

Inspect screw, barrel, and die regularly

Clean machine after each production cycle

Lubricate moving parts consistently

 

 

FAQ 

 

Q1: Why is my floating fish feed pellet making machine running but not producing pellets?

Because of blockage caused by improper raw materials, incorrect parameters, or worn components.

Q2: What moisture level is best for fish feed extrusion?

Typically 12%–15% for stable material flow and proper pellet formation.

Q3: Can low temperature cause no discharge?

Yes. Without sufficient heat, materials won't gelatinize, leading to poor flow and blockage.

Q4: How often should I clean the die head?

After each production cycle to prevent buildup and blockage.

Q5: What is the fastest way to fix extrusion blockage?

Stop the floating fish food pellet maker machine, disassemble the die, clean residues, and check parameters before restarting.

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