616.368.2684 chris@bluebilles.com

Air Traps-How Do I Find Them?

The Problem “Am I going to get trapped air in the mold?”  “Where will the air traps be?” “Air traps” are areas in the mold where air cannot escape during the molding process.  Since the mold halves are designed one for one, meaning the mold halves touch, the air that...

Weld Lines and Meld Lines-Can I Find Them?

The Problem “Where will the weld lines be?”  “What is a meld line?” “Weld lines” is term that is used when two plastic flow fronts come together.  Typically, this happens around screw bosses, differential thicknesses in part geometry and multiple gate locations in a...

How do I know the cavity has a balanced fill?

The Problem “How do I know the cavity has a balanced fill.” Unbalanced filling within the cavity can lead to many issues with the final molded part, namely warping.  If the part is not filled evenly, meaning the melt front arrives at both ends of the part, there is...

Where Do I Put The Gate and How Many Do I Need?

The Problem “I am not sure how many gate locations I will need to properly fill the part and I am also not sure where to put them.”   Gate location is critical in the injection molding process, gates are the points on the part where the plastics leaves the runner...