Process Inputs vs. Process Outputs

In a recent webinar on the topic of Scientific Molding, I received this question regarding process outputs… Vishu In a scientific injection molding process, can we change process inputs while maintaining the same outputs? My Response There are many cases where a change in the inputs may have little or no affect on the actual […]

Minimum Mold Sizing

Someone was preparing for some in-house training, and asked me this important question… Marcel We are selecting a mold for training. I have a mold in house, however the size of the mold base is 8″ x 8″. I know the manual suggests a mold base minimum of 17″ x 17″ under full tonnage. Can […]

Interpreting Viscosity Curves

As a response to the Fill Time, Viscosity & Molding Economics blog I received this question… E-Mailer With respect to a in-mold rheology test, why should we choose to process on the right-hand side of the curve? My Response As the shear rate, or flow rate, of the polymer increases… the viscosity decreases. This rheological behavior is […]

Using Hold Pressure Velocity

I received this question from a frequent blog contributor, and believe it makes a good discussion on decoupled processes… Milan On some of our machines, we can adjust the hold velocity. How should this feature be used when molding a decoupled II process. My Response Before I respond, I want to relate the general attributes of […]