Common problem 1 in mold trial: main runner sticking to mold

The method and sequence of solving the problem:

1. Polish the main runner → 2. The nozzle coincides with the center of the mold → 3. Reduce the mold temperature → 4. Shorten the injection time → 5. Increase the cooling time → 6. Check the nozzle heating ring → 7. Polish the mold surface → 8. Check the material Is it polluted

Common problem 2 in mold test: Difficulty in demoulding plastic parts

The method and sequence of solving the problem:

1. Reduce the injection pressure → 2. Shorten the injection time → 3. Increase the cooling time → 4. Reduce the mold temperature → 5. Polish the mold surface → 6. Increase the demolding slope → 7. Reduce the gap at the insert

Common problem 3 in mold trial: poor dimensional stability

The method and sequence of solving the problem:

1. Change the barrel temperature → 2. Increase the injection time → 3. Increase the injection pressure → 4. Change the screw back pressure → 5. Increase the mold temperature → 6. Decrease the mold temperature → 7. Adjust the feeding amount → 8. Decrease Small return ratio

Common problem 4 in trial mode: surface ripple

The method and sequence of solving the problem:

1. Adjust the feeding amount → 2. Increase the mold temperature → 3. Increase the injection time → 4. Increase the injection pressure → 5. Increase the material temperature → 6. Increase the injection speed → 7. Increase the size of the runner and gate

Common Problem 5 in Trial Molding: Warping and Deformation of Plastic Parts

The method and sequence of solving the problem:

1. Reduce the mold → 2. Reduce the material temperature → 3. Increase the cooling time → 4. Reduce the injection speed → 5. Reduce the injection pressure → 6. Increase the screw back pressure → 7. Shorten the injection time

Common problem 6 in mold test: peeling and delamination of plastic parts

The method and sequence of solving the problem:

1. Check the type and grade of plastic → 2. Check whether the material is contaminated → 3. Raise the mold temperature → 4. Dry the material → 5. Raise the material temperature → 6. Reduce the injection speed → 7. Shorten the gate length → 8. Reduce Small injection pressure → 9. Change gate position → 10. Use large hole nozzle

Common problem 7 in mold test: silver stripe runner sticking to mold

The method and sequence of solving the problem:

1. Reduce material temperature → 2. Material drying → 3. Increase injection pressure → 4. Increase gate size → 5. Check the type and grade of plastic → 6. Check whether the plastic is contaminated

Common problem 8 in test mode: poor surface gloss

The method and sequence of solving the problem:

1. Material drying → 2. Check whether the material is contaminated → 3. Increase the material temperature → 4. Increase the injection pressure → 5. Increase the mold temperature → 6. Polish the mold surface → 7. Increase the size of the runner and gate

Common problem 9 in trial mode: dents

The method and sequence of solving the problem:

1. Adjust the feeding amount → 2. Increase the injection pressure → 3. Increase the injection time → 4. Decrease the material speed → 5. Decrease the mold temperature → 6. Increase the exhaust hole → 7. Increase the size of the runner and gate → 8. Shorten the length of the runner → 9. Change the gate position → 10. Reduce the injection pressure → 11. Increase the screw back pressure

Common problem 10 in mold test: air bubbles

The method and sequence of solving the problem:

1. Material drying → 2. Reduce material temperature → 3. Increase injection pressure → 4. Increase injection time → 5. Increase mold temperature → 6. Reduce injection speed → 7. Increase screw back pressure