Ten common problems in mold testing

- Mar 28, 2019-

Common problem in mold test 1: the main runner sticky mold

Common problem in mold test 1: the main runner sticky mold
Methods and sequence of problem solving:
  1. Polishing main runner 2. Superposition of nozzle and mold center 3. Reduce mold temperature 4. Shorten injection time 5. Increase cooling time 6

    Common problem in model test 2: demoulding difficulty
    Methods and sequence of problem solving:
    Reduce the injection pressure 2. Shorten the injection time 3. Increase the cooling time 4. Reduce the mold temperature 5


  2. Common problem in die test 3: poor dimensional stability

  3. Methods and sequence of problem solving:

  4. Change the temperature of the cylinder to 2. Increase the injection time to 3. Increase the injection pressure to 4. Change the screw back pressure to 5

Common problem in mold test 4: surface ripple
Methods and sequence of problem solving:
1. Adjust the feed quantity 2. Increase the mold temperature 3. Increase the injection time 4. Increase the injection pressure 5
Common problem in mold testing 5: warping and deformation
Methods and sequence of problem solving:
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

Common problem in model test 6: peeling layer


Methods and sequence of problem solving:

Check material type and grade 2. Check whether the material is polluted 3. Raise the mold temperature 4

Common problem in mold test 7: silver stripe runner sticky mold

Common problem in mold test 7: silver stripe runner sticky mold
Methods and sequence of problem solving:
1. Reduce the material temperature 2. Dry the material 3. Increase the injection pressure 4. Increase the gate size 5
Common problem 8: bad surface gloss
Methods and sequence of problem solving:
1. Material drying treatment 2. Check whether the material is contaminated 3. Increase the material temperature 4. Increase the injection pressure 5
Common problem in mold test 9: indentation
Methods and sequence of problem solving:
1. Adjust the feed quantity 2. Increase the injection pressure 3. Increase the injection time 4. Reduce the material speed 5. Reduce the mold temperature 6. Increase the exhaust hole 7
Common problem 10: bubbles
Methods and sequence of problem solving:
1. Material drying treatment 2. Reduce the material temperature 3. Increase the injection pressure 4. Increase the injection time 5