I received this question today from a blogger… Blogger How should I proceed, when I want to adjust the process on an older pressure-controlled machine (not velocity controlled)? My Response Although each of these older machines have their own specific limitations… there is a basic strategy to use with open-loop pressure-limited injection molding machines: 1) Fill […]
Monthly Archives
April 2010
Load Sensitivity Test On Electric Molding Machines…
I was asked this question the other day… Milan Does it make any sense to perform a load sensitivity test on a electric machine?. I did few tests, but results were very good, range 0,016% to 0,105%. Note: The Dynamic Load Sensitivity Test measures how much the injection time shifts with a change in resistance. My Response Most all-electric […]
Transferring on End of Fill…
I received a blog response which highlights a growing trend in the molding industry… Blogger I am using a pressure sensor at the End of Fill on a new all-electric molding machine. With a DIII process, I am having good success in using the pressure at the end of fill for V/P transfer. This works […]
Group Training In Different Facilities…
I was asked the following question the other day… Don In our main facility, we follow up our training with group discussions with some success. Unfortunately, in our facility overseas, these discussion groups don’t work at all. Do you have any ideas why this happens? My Response In group settings, there are typically a couple people […]
Results of Screw Wear…
I received this follow-up question in a recent blog and decided to answer it in more detail using the blog… MJ Which kind of process parameters vary when the screw becomes worn? My Response Basically, the most common affects that arise from screw wear relate to the increased back-flow over the flights of the screw. This back-flow increases mixing, […]