One of our customers brought up this question… Jim M. How does shear rate vary for the same fill rate going from a small screw to a large screw? The volumetric flow rate being the same of course, but is there a difference in shear rate caused by the barrel / screw size differences? My […]
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Routsis Training
The Costs Of Not Training
This is a short excerpt from our executive audiobook entitled ‘The Science of Training’… Excerpt There are clearly some expenses associated with setting up and launching a well-planned training initiative. This is undeniable. But have you stopped to think about how much you’re spending by NOT training your employees? Or maybe you are trying to train […]
Max Velocity Settings for Thin Wall Molding
A blog reader submitted an entry this morning… Jean Francois We are using a decoupled process. During fill, the pressure is set to a max pressure and should not to be reached. However, when molding thin wall parts with long flow paths, it is common to reach the maximum machine capacity pressure before reaching the expected velocity. […]
Correcting Outdated Process Philosophies
An employee confronted his management with this proclamation he found on a website… I was asked to explain why this was an incorrect philosophy for a 21st century processor. Outdated Philosophy Plastic is compressible. We must take the injected shot past its ability to compress so that it acts like a hydraulic (non-compressible) fluid to […]
The Effects Of In-Mold Labelling On Polymer Flow
In a recent webinar, I received this short question… Jeremy Does the use of in-mold labelling have a significant effect on polymer flow? My Response Basically, there should be no significant change in the behaivor of the polymer. Since the polymer exhibits fountain flow, the polymer touching the label surface is stagnant, while the moving […]