Problems and solutions that are easy to occur in the extrusion granulation of plastic granulator
Problems and solutions that are easy to occur in the extrusion granulation of plastic granulatorHot-cutting granulation method is prone to problems during extrusion granulation. For other extrusion granulation methods, mainly the cooling method of the pellets is different, the factors affecting the quality of the particles are the same, let's take a look together below.
1. The pellets extruded by the plastic granulator are too short
Cause Analysis:
1. The body temperature is too high
2. The screw speed is too slow
3. Too many cutters
4. Cutter turns too fast
Solution:
1. Reduce the body temperature of the plastic granulator
2. Speed up the screw speed
3. Reduce the number of cutters
4. Reduce cutter speed
Second, the pellets are too long
Cause Analysis:
1. The temperature of the body of the plastic granulator is low
2. The screw speed is too fast
3. Too few cutters
4. Cutter speed is too slow
Solution:
1. Increase the body temperature
2. Reduce the screw speed
3. Increase the number of cutters
4. Increase cutter speed
3. The diameter of the pellets extruded by the plastic granulator is too different
Cause Analysis:
1. Improper arrangement of holes in perforated plates
2. Improper aperture size of porous plate
3. The temperature of the machine head is uneven
Solution:
1. Replace the multi-well plate and revise the aperture array
2. Replace the porous plate and modify the pore size
3. Adjust the head temperature to make it even
Fourth, the diameter of the pellet is too large
Cause Analysis:
1. The aperture of the porous plate is too large
2. The compression ratio of the aperture of the porous plate is too large
3. The screw speed is too fast
Solution:
1. Replace the porous plate with small pore size
2. Replace the porous plate
3. Reduce the screw speed
Fifth, the surface of the granules extruded by the plastic granulator is not smooth or mercaptopine
Cause Analysis
1. Low body temperature
2. The head temperature is low
3. The filter mesh is too thick
4. The filter is broken
5. Unreasonable design of porous plate
6. Screw compression ratio is too small
7. The screw speed is too fast
Solution:
1. Raise the temperature of the plastic granulator body
2. Raise the temperature of the machine head
3. Increase the number of filters
4. Replace the filter
5. Improve aperture compression ratio or straight part length
6. Improve screw compression ratio
7. Reduce the screw speed
Sixth, pellet adhesion
Cause Analysis
1. The temperature of the machine head is too high
2. The screw speed is too fast
3. Particle cooling is too slow
4. The knife edge is too blunt
Solution
1. Reduce the temperature of the head of the plastic granulator
2. Reduce the screw speed
3. Increase the cooling rate
4. Change the cutter blade
Seven. There is a tail at the root of the pellet
Cause Analysis:
1. Uneven level of cutter holder
2. Several cutters are installed unevenly or loosely
3. The cutter is too blunt
4. Unstable extrusion volume
Solution:
1. Adjust the cutter holder
2. Adjust the cutter or tighten the cutter
3. Change the cutter blade
4. Adjust the amount of extrusion to make it stable
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