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I was asked this question the other day when discussing molding defects… Student What actually causes Jetting? My Response This defect occurs when the polymer shoots into the mold and does not create a smooth laminar, or fountain, flow as it first enters the mold cavity. A laminar flow occurs when the polymer enters the […]

I was asked this question by a student the other day… Bob Can you please define Micro-Molding? My Response I have seen this defined as small parts around 1 milligram or less. In practice, I have seen it refer to parts much larger than that… The aspect that seems to differentiate micro molding vs. small […]

I was asked this during NPE… Manager My guys want me to look into the ‘shear balancing’ runner technology while I am here… Is this stuff worth it, or do radiused runners work just as well? My Response Runner technologies which balance the shear imbalance within the runner system and are invaluable in helping to […]

At the recent NPE I noticed an emphasis on robotics… Simplifying Robotics There were many great advances to the programming and interface systems for robotics. Each advancement in simplifying the programming of robotics will improve the learning curve for a setup technician. One manufacturer even demonstrated the ability to have the robot mimic manual physical movements of […]

I was asked this question the other day… Quality Manager What is a good way to ensure a silicone molding process is consistent? My Response One good way to check the consistency of the process is to routinely measure the part weight. A consistent part weight indicates the same amount of material is injected and […]