by John Ralston, Beaumont Technologies, Inc. Question: I did a mold filling simulation on a new part and mold design to ensure that we had enough pressure available to fill the part. However, the analysis under-predicted the pressures by 20 percent, and now I am on the verge of being pressure limited. I have to go back and rework the mold or find a molding machine with more … [Read more...] about Mold Filling Simulation … Under Pressure
Process Improvement
Medical Molding Benefits from Revalidation of Injection Molding Processes Using Universal Set-up Data
by Bob Reese, RJG, Inc. In most injection molding applications, a mold is validated to run in a particular machine. Moving the mold to another press often is required for operational efficiency, but this usually requires revalidation. Depending on the application, revalidation can be very expensive. Costs include press time, material, engineering time, metrology and … [Read more...] about Medical Molding Benefits from Revalidation of Injection Molding Processes Using Universal Set-up Data
Reducing the Maintenance Burden on Technicians at Blow Molded Specialties
Plastics Business When a highly skilled, highly compensated technician is performing machine setup, it's best not to interrupt that technician with minor maintenance issues. Interruptions can cause errors to be introduced, as well as adding both time and cost to the bottom line. That's the premise Tom Boyd, president of Blow Molded Specialties in Pawtucket, Rhode Island, was … [Read more...] about Reducing the Maintenance Burden on Technicians at Blow Molded Specialties
Tips for the Effective Use of Purging Materials
By John Pizzo, Sun Plastech 1.How do we know which type of purge is best for our facility? These days, there are a number of commercial purging compounds (CPCs) to choose from, and they can all be grouped into several types or categories based upon the way they work. The most popular types are mechanical or chemical, and there are some newer "hybrids" that incorporate … [Read more...] about Tips for the Effective Use of Purging Materials
DOE Brings Benefits to Process Design
by Perry Parendo, Perry's Solutions, Inc. After decades of working with multiple industries, I have found only one developmental tool that works when things are not going as expected. That tool is Design of Experiments (DOE). It is a statistically based tool that allows evaluation of simultaneous input variables and the impact they have on contradictory requirements. When … [Read more...] about DOE Brings Benefits to Process Design