This question highlights an often overlooked concern when using pressure sensors mounted underneath ejector pins. Milan How much of a gap should be used between the pressure sensor and the ejector pin? My Response The general recommendation from most manufacturers is between 0.25-0.5mm or 0.010-0.020in. In reality, this specification refers to the clearance between the top of […]
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Routsis Training
Regrinding Sandy Plastic…
I received this interesting question recently… Joy I have a client with ten tonnes of material awaiting regrind and re-processing. Unfortunately, the material is contaminated with sand. I have a couple questions. First, is it unethical to regrind and re-process the material since it is contaminated? Second, what are the financial costs and ethics associated […]
Understanding Pressure…
Someone was reading one of my archived blog entries and asked me this follow-up question… Tan Could you please define pressure in a way that I can explain it easily to my technicians? My Response Pressure is a measurement of force spread out over an area. Pressure = Force / Area This means, if you […]
Moving a Mold from One Machine to Another…
I just got this question the other day… MJ When I want to move mold to another machine, which machine parameters should I check? My Response This question brings up the importance of machine independent documentation that includes part specific data such as part weight, fill time, coolant and melt tempertaures as well as the actual […]
Understanding Velocity-Control…
I received this question from a previous contributor… Rafael When you write velocity-controlled injection, what do you mean? My Response A velocity controlled process uses a velocity setpoint to control the rate at which the polymer is injected into the mold. Usually this is represented on the control panel as in/s or mm/s. On a hydraulic machine, […]