In a recent e-mail, I received this question regarding tool steel… Kevin W. Is P-20 an acceptable steel material to hold up to 60,000 annual volume for 10 years. The material is 15% glass fill nylon with 25% talc fill? My Response By itself, P-20 lacks the wear resistance to produce half a million cycles […]
Category Archives
Plastics Technology
2nd Stage Time vs. 2nd Stage Pressure
During a recent webinar, I received this great question… Webinar Participant Do you recommend running at different pressures when performing gate seal studies? My Response You should first determine the optimum pressure using a relatively large 2nd stage time. This allows you to determine the actual amount of pressure that is required to pack and […]
Cushion Monitoring: Variation & Setting Limits
One of our more advanced customers just asked these questions… Jim M. Monitor the shot-to-shot variation (cushion)… if it is not consistent, can I increase the back pressure? What tolerance should I be able to hold on cushion, e.g. I am hitting 0.20” cushion, what should I be expecting to repeat, i.e. what min & […]
2009 NPE – Don’t Miss It!
Hi Everyone, Try not to miss the 2009 NPE in Chicago.Visit the website at www.npe.org
Dynamic Check Ring Repeatability Test
One of our more advanced customers brought to us this observation… Jim M. It is interesting that this test does not utilize the pack & hold portion of the cycle; just the fill portion. Experience shows, especially with high 2nd stage pressures, that the screw will drift, and some reflection of that would be a […]