Top Ten Problems of Mold Trial

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Common problems in mold trial 1: The main runner sticks to the mold

The method and order of solving the problem:

1 Polishing the main runner → 2 nozzles coincide with the center of the mold → 3 lowering the mold temperature → 4 shortening the injection time → 5 increasing the cooling time → 6 checking the nozzle heating ring → 7 polishing the mold surface → 8 checking whether the material is contaminated.

Common problem in mold trial 2: Difficulty in demolding plastic parts

The method and order 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 draft angle → 7 reduce the gap between the inserts Common problem in mold trial 3: Poor dimensional stability

The method and order 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 reduce the proportion of the return material Frequently asked questions in mold test 4: Surface ripples

The method and order of solving the problem:

1 Adjust the feed volume → 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

 Frequently asked questions in mold trial 5: warpage and deformation of plastic parts

The method and order of solving the problem: 1 Decrease mold → 2 Decrease material temperature → 3 Increase cooling time → 4 Decrease injection speed → 5 Decrease injection pressure → 6 Increase screw back pressure → 7 Shorten injection time

Frequently asked questions in mold trial 6: peeling and delamination of plastic parts

The method and order of solving the problem:

1 Check the type and level of the plastic → 2 check whether the material is polluted → 3 increase the mold temperature → 4 material drying treatment → 5 increase the material temperature → 6 reduce the injection speed → 7 shorten the gate length → 8 reduce the injection pressure → 9 change the gate Position → 10 adopts large hole nozzle

 Frequently asked questions in mold test 7: sticking to the mold with silver pattern runner

 The method and order of solving the problem:

1 Reduce the temperature of the material → 2 Dry the material → 3 Increase the injection pressure → 4 Increase the gate size → 5 Check the type and level of the plastic → 6 Check whether the plastic is polluted Common problem 8 in mold trial: Poor surface gloss

The method and order of solving the problem:

1 Material drying treatment→2Check whether the material is polluted→3Increase the material temperature→4Increase the injection pressure→5Increase the mold temperature→6 Polish the surface of the mold→7 Increase the size of the runner and gate Frequently asked questions in mold trial 9: dents

The method and order of solving the problem:

 1 Adjust the feed volume → 2 increase the injection pressure → 3 increase the injection time → 4 reduce the material speed → 5 reduce the mold temperature → 6 increase the vent hole → 7 increase the runner and gate size → 8 shorten the runner length → 9 Change the gate position → 10 to reduce the injection pressure → 11 to increase the screw back pressure Common problem 10 during mold trial: bubbles

The method and order of solving the problem: 1 Material drying treatment → 2 Reduce material temperature → 3 Increase injection pressure → 4 Increase injection time → 5 Increase mold temperature → 6 Decrease injection speed → 7 Increase screw back pressure


Post time: Nov-10-2021