This question addresses a common issue for many techs… Jane What is the best way to evaluate the performance of a check ring? My Response To evaluate the performance of the check ring, it is recommended that you perform the dynamic check ring repeatability test. This test consists of producing and weighing a series of […]
Monthly Archives
February 2011
Shut-Off Nozzles and Long Hold Times…
I reviewed the previous post where the blog reader asked whether electric machines are good for applications with long hold times and I wanted to add another comment… Shut-Off Nozzles Although some molders purchase shut-off nozzles to eliminate drooling, they are very helpful as part of an overall molding strategy. In the case of a process with a long […]
Long Hold Times on Electric Molding Machines…
I received this as a follow-up question for a previous blog posting on The Future of Plastics… Ed We are adding a new machine this year and we are looking at a electric machine. Our biggest concern with electric is the hold time. Due to our thick wall parts we use extended hold times. Does anyone have any […]
Company-Specific Training…
Recently, a potential customer mentioned this comment… Caller I like the idea of training my employees about extrusion, yet I need something specific to my operation and I don’t have time to create it. My Response First off, generic extrusion training is always better than no process training at all. As one of our customers […]
Can Low Melt Temperature Cause Flash?
Yesterday, I was asked this question… GH My tech told me that we were getting flash as a result of a low barrel temperature. An increase in barrel temperature fixed the problem, but I don’t know why, could you explain? My Response It may seem counter-intuitive, but flash could be the result of a low melt temperature or […]