I received a follow-up question regarding a post earlier this year, The Uses of MFI…, KJ You mentioned the spiral flow, what is this test? My Response The spiral flow test uses a mold with a long spiral flow channel emanating from the center. Notches are etched along the flow path to help identify the length the polymer has flowed […]
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Routsis Training
Thermoplastics vs. Thermosets…
I have read some industry discussion groups lately and have noticed some confusion on the difference between Thermosets and Thermoplastics, so I will use this post to help clarify these points… Thermosets Thermosets are polymerized during processing while thermoplastics are polymerized before being processed. During processing, the polymer chains in thermosets fuse together, or cross-link. […]
Drop Packing Pressure and Time…?
This question came in from a molder overseas… HM During process optimization, which is best, keep both the packing pressure and packing time to zero OR only holding pressure? My Response This is based on your machine. On most machines, you can turn the pressure down to zero and the pressure will turn off. Before […]
Why Commit to Training…?
I was on a call the other day and was asked this question… Caller What type of commitment should I make to training, and why? My Response An in-house training initiative gives you a competitive edge in today’s fast-paced plastics industry. Well trained employees can better cope and adapt to changing product lines, customer requirements, and production strategies. Today’s customers are sensitive to […]
Retaining Defects…
I was recently visiting a molder who was having a specific problem… Supervisor We are having trouble with our employees properly identifying and naming part defects… any suggestions as to how we can improve this? note: After a couple questions, it was determined that they do not retain defective parts as they are all discarded, reworked, or reground. My Response It […]