Ten problems in plastic mold trial

Mold industry is a basic industry in the national economy, involving machinery, automobile, light industry, electronics, chemical industry, metallurgy, building materials and other industries. With the rapid development of China's industry, plastic mold has become an indispensable material in real life. Focus on mold manufacturing mold master told you about the ten major problems of plastic mold testing.

1、 Mould sticking of main runner
Solution and order of problems:
1 polishing the main runner → 2 the nozzle coincides with the mold center → 3 lowering the mold temperature 4 shortening the injection time → 5 adding cooling time → 6 checking the nozzle heating ring → 7 polishing the mold surface → 8 checking whether the data is contaminated.
2、 It is difficult to demould plastic parts
Methods and order of solving problems:
1 decrease the injection pressure → 2 shorten the injection time → 3 increase the cooling time → 4 decrease the mold temperature → 5 polish the mold surface → 6 increase the demoulding slope → 7 reduce the gap at the insert
3、 Poor dimensional stability
Solution and order of problems:
1. Change the barrel temperature → 2. Add 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 feed rate → 8. Reduce the feed rate
4、 External ripple
Solution and order of problems:
1 adjust the feed rate → 2 increase the mold temperature → 3 add the injection time → 4 increase the injection pressure → 5 improve the material temperature → 6 increase the injection speed → 7 add the gate and gate size
5、 Warpage and deformation of plastic parts
Solution and order of problems:
1 lower the mold → 2 lower the material temperature → 3 add the cooling time → 4 decrease the injection speed → 5 decrease the injection pressure → 6 add the screw back pressure → 7 shorten the injection time
6、 Peeling and delamination of plastic parts
Solution and order of problems:
1 check the type and grade of plastic → 2 check whether the data is polluted → 3 increase the mold temperature → 4 dry material treatment → 5 improve the material temperature → 6 decrease the injection speed → 7 shorten the gate length → 8 reduce the injection pressure → 9 change the gate orientation → 10 select the large hole nozzle
7、 Die bonding of silver striped runner
Solution and order of problems:
1. Reduce material temperature → 2. Dry material treatment → 3. Increase injection pressure → 4. Increase gate size → 5. Check the variety and grade of plastic → 6. Check whether the plastic is polluted
8、 Poor gloss
Solution and order of problems:
1. Dry material treatment → 2. Check whether the data is polluted → 3. Improve the material temperature → 4. Increase the injection pressure → 5. Increase the mold temperature → 6. Polish the mold surface → 7. Increase the size of the gate and gate
9、 Dent
Solution and order of problems:
1 adjust the feed rate → 2 increase the injection pressure → 3 add the injection time → 4 decrease the material speed → 5 decrease the mold temperature → 6 add the vent hole → 7 increase the gate and gate size → 8 shorten the gate length → 9 change the gate orientation → 10 decrease the injection pressure → 11 increase the screw back pressure
10、 Bubbles
Solution and order of problems:
1 dry material treatment → 2 decrease material temperature → 3 increase injection pressure → 4 add injection time → 5 increase mold temperature → 6 decrease injection speed → 7 increase screw back pressure.

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