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23 09, 2021

Air Bubbles Blisters troubleshooting

By |2021-09-23T16:46:15+08:00September 23rd, 2021|Categories: troubleshooting|Tags: , , , , , , , , |Comments Off on Air Bubbles Blisters troubleshooting

What is Air Bubbles or Blisters defects

Air Bubbles are molding defects that appear when gas is trapped in the melt material and injected into the cavity leaving a cosmetic defects in the plastic molding part, we also call this as gas traps issues or blisters defects.

There some some reason to cause this Bubbles or Blisters defects.

air bubbles issue

air bubbles issue

Air Bubbles issues caused by Injection molding machine setting

Back pressure too low. As the plastics material is melted and augured through the heating cylinder, air becomes trapped within the melt. One of the uses of back pressure is to force this air out before it gets injected […]

23 09, 2021

Black Specks or Streaks troubleshooting

By |2021-09-23T15:39:37+08:00September 23rd, 2021|Categories: troubleshooting|Tags: , , |Comments Off on Black Specks or Streaks troubleshooting

What is Black Specks or Streaks

Black or brown specks are spots of degraded plastic or dark spots that show on the injection molded part. This Black or brown specks defects will be more visible on white color or clear plastic molded parts, we also call as carbon buildup, sometime we normally think it is material mix issue.

Black or brown specks

Black or brown specks

Black Specks Troubleshooting Molding Process Issues

If Black or brown specks defects caused by the plastic has been degraded to a charred state. This is most often a case of material that has been in the barrel at temperature for too long. There are several […]

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