How to solve the problems that often occur in plastic granulator during extrusion granulation?

Problems and solutions that plastic granulators are prone to in extrusion granulation. Hot cutting granulation is prone to problems in extrusion granulation. For other extrusion granulation methods, the main reason is that the pellet cooling method is different. The factors that affect the quality of the pellets are the same. Let's take a look at it together.

1. The pellets extruded by the plastic granulator are too short

Reason analysis:

1. The body temperature is too high

2. The screw speed is too slow

3. There are too many cutters

4. The cutter speed is too fast

Solution:

1. Reduce the body temperature of the plastic granulator

2. Increase the screw speed

3. Reduce the number of cutters

4. Reduce the cutter speed

2. The pellets are too long

Reason analysis:

1. The body temperature of the plastic granulator is too low

2. The screw speed is too fast

3. There are too few cutters

4. The cutter speed is too slow

Solution:

1. Increase the body temperature

2. Reduce the screw speed

3. Increase the number of cutters

4. Increase the cutter speed

3. The diameter of the pellets extruded by the plastic granulator is too different

Reason analysis:

1. Porous plate hole arrangement is not appropriate

2. Porous plate aperture size is not appropriate

3. Uneven head temperature

Solution:

1. Replace the porous plate and modify the aperture arrangement

2. Replace the porous plate and modify the aperture size

3. Adjust the head temperature to make it uniform

IV. The particle diameter is too large

Cause analysis:

1. The porous plate aperture is too large

2. The porous plate aperture compression ratio is too large

3. The screw speed is too fast

Solution:

1. Replace the porous plate with a small aperture

2. Replace the porous plate

3. Reduce the screw speed

V. The surface of the particles extruded by the plastic granulator is not smooth or thiourea

Cause analysis

1. The body temperature is too low

2. The head temperature is too low

3. The filter mesh is too coarse

4. Filter mesh is broken

5. Irrational design of porous plate

6. Screw compression ratio is too small

7. Screw speed is too fast

Solution:

1. Increase the temperature of the plastic granulator body

2. Increase the head temperature

3. Increase the number of filter meshes

4. Replace the filter

5. Increase the aperture compression ratio or the length of the straight part

6. Increase the screw compression ratio

7. Reduce the screw speed

VI. Granule adhesion

Cause analysis

1. The head temperature is too high

2. The screw speed is too fast

3. The particles cool too slowly

4. The cutting blade is too blunt

Solution

1. Reduce the head temperature of the plastic granulator

2. Reduce the screw speed

3. Increase the cooling speed

4. Replace the cutter blade

Seventh, there is a tail at the root of the pellet

Cause analysis:

1. The cutter frame is uneven

2. Several cutters are installed unevenly or loosely

3. The cutter is too blunt

4. The extrusion volume is unstable

Solution:

1. Adjust the cutter frame

2. Adjust the cutter or tighten the cutter

3. Replace the cutter blade

4. Adjust the extrusion volume to make it stable