I Temperature of expansion chamber cannot reach to rated temperature

Causes

1. Jacked steam line is blocked

2. The inlet steam line of expansion chamber is blocked

Solutions

1. Clean the jacked steam line

2. Clean the inlet steam line of expansion chamber

II Conditioning temperature cannot reach to requirement

Causes

1. Steam pressure is not sufficient

2. Steam line is blocked

Solutions

1. Check steam pressure, adjust it normally to 4bar

2. Clean the steam line

III Materials surface is coarse with different length after expansion

Causes

1. Poor conditioning

2. Part of die plate holes blocked

3. Insufficient particle size

4. Die plate is in bad quality

Solutions

1. Condition the materials

2. Stop to clean the die plate

3. Increase particle size

4. Use die plates manufactured from qualified works

IV Throughput reduced

Causes

1. Shearing block is worn

2. Sever wearing to screw head

Solutions

1.Replace shearing block

 2. Replace screw head

V Do not discharge after normal operation

Causes

1. Excessive short-time feeding or material cut-off;

2. Die holes are blocked.

Solutions

1. Stop the machine and check.

VI Wave type intermittent discharge

Causes

1. The fullness of expansion chamber is insufficient.

Solutions

1. Increase throughput.

VII Insufficient expansion

Causes

1. Ripeness of materials is insufficient.

Solutions

1. Increase throughput;

2. Raise conditioning temperature;

3. Raise jacket heating temperature;

4. Increase rotating speed of principal machine.

VIII Excessive expansion

Causes

1. Over-high temperature;

2. Over-high rotating speed of principal machine;

3. Die plate hole area is not matched with the throughput.

Solutions

1. Reduce temperature;

2. Reduce rotating speed;

3. Change the die plate hole area or adjust throughput.

IX Over long or over short expanded pellet

Causes

1. Over high or over low cutting speed.

Solutions

Adjust rotating speed of the cutting drive.

X Poor product forming

Solutions

1. Improper formula of raw materials;

2. Over high or over low processing temperature;

3. Unstable feeding;

4. Over high or over low moisture content in product;

5. Improper cutting speed;

6. Blade is worn;

7. Too large grinding particle size.

Solutions

1. Change formula of raw materials;

2. Recombine the components in machine barrel;

3. Adjust to even feeding;

4. Reduce or increase moisture or steam addition volume;

5. Adjust to a proper rotating speed;

6. Replace blade;

7. Grind the raw materials further to reach a finer particle size.