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 reduce the mold temperature → 7 adjust the amount of material supply → 8 reduce the proportion of return material
Common Problems in Mold Testing 4: Surface Ripple
Problem solving method and sequence:
1 Adjust the amount of material supply → 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 sprue and gate
Common problems in the test mold 5: warping and deformation of plastic parts
Problem solving method and sequence:
1 lower the mold → 2 lower the material temperature → 3 increase the cooling time → 4 lower the injection speed → 5 lower the injection pressure → 6 increase the screw back pressure → 7 shorten the injection time
Common problems in the test mold 6: peeling and delamination of plastic parts
Problem solving method and sequence:
1 check the type and grade of plastic → 2 check whether the material is contaminated → 3 increase the mold temperature → 4 material drying treatment → 5 increase the temperature of the material → 6 reduce the injection speed → 7 shorten the length of the gate → 8 reduce the injection pressure → 9 change the location of the gate → 10 use a large hole nozzle
Common Problem 7 in mold testing: silver wire mottled sprue sticking to the mold
Problem solving method and sequence:
1 Reduce the material temperature → 2 Dry the material → 3 Increase the injection pressure → 4 Increase the gate size → 5 Check the type and grade of plastic → 6 Check whether the plastic is polluted or not
Common Problem 8: Poor surface luster in mold testing
Problem solving method and sequence:
1 material drying treatment → 2 check whether the material is contaminated → 3 increase the material temperature → 4 increase the injection pressure → 5 increase the temperature of the mold → 6 polish the surface of the mold → 7 increase the size of the sprue and gate
Common Problems in Mold Testing 9: Dents
Problem solving method and sequence:
1 Adjust the amount of material supply → 2 Increase the injection pressure → 3 Increase the injection time → 4 Decrease the material speed → 5 Decrease the mold temperature → 6 Increase the air vent → 7 Increase the size of sprue and gate → 8 Shorten the length of the sprue channel → 9 Change the location of the gate → 10 Decrease the injection pressure → 11 Increase the screw back pressure
Common Problems in Mold Testing 10: Air Bubbles
Problem solving method and sequence:
1 material drying treatment → 2 reduce the material temperature → 3 increase the injection pressure → 4 increase the injection time → 5 increase the mold temperature → 6 reduce the injection speed → 7 increase the screw back pressure
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