Air Bubbles 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 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 […]