I have been asked about the proper use of an open-loop molding machines… Customer When implementing DECOUPLED MOLDINGsm, how should we best incorporate our open-loop molding machines? My Response Basically, open-loop molding machines are not capable of this since open-loop molding machines cannot decouple 1st stage filling from 2nd stage packing. These machines lack closed-loop, injection velocity control and inject using pressure control instead. As […]
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Routsis Training
Mean, Median, and Mode…
I heard a quality technician make the following comment the other day… Technician Mean, Median, Mode… they are all the same. Mean The mean is the average of measurements within a particular sampling. This value equals the sum of all the numbers in a sampling divided by the number of values in the sample. For example: the […]
Silver Streaks with PC…
This question arrived this morning via email… TA We are processing polycarbonate and are having problems with short molding as well as silver streaks. The mold design is a hot runner system with three drops. My Response For the silver streaks, I suggest you ensure the material is properly dried. A dewpoint meter or moisture analyzer should […]
Basic Gravimetric Feed Systems…
I was at an extrusion customer site last week and they were not sure whether the feed system was truly gravimetric or volumetric…. Customer The system uses a scale to measure the material used when filling the hopper, but has a feed screw to meter the material to the feedthroat. The system can be set […]
Keeping Basic Tools at Your Employee’s Workstation…
I was at a customer site last week and we were discussing the use of math on the production floor… Supervisor The operators always seem to have trouble counting up how many profiles are on each cart. All they need to do is use a calculator to multiply the number of profiles across by the number high. note: During this discussion, I asked the […]