Category Archives

This unique question was submitted by one of our more active bloggers… Milan What would be the difference in injection molding old fashioned rubber-like materials and the newer polymers like PBT? My Response Although I have only had a few opportunities to process natural rubbers, it is an interesting experience. Processing PBT – Polybutylene Terephthalate, PBT, is […]

I received this interesting question from a blog reader the other day… Leslie I recently came across this term: Shot Volume Factor and the units are in^3/in (cubic inches per inch).  I speculate that it is some kind of volume conversion number that when used will allow a user to quickly convert shot size from […]

I recently had a discussion with a friend of mine regarding robotics… Al We would love to use robotics, but our parts are very complex, and cannot be removed by a simple robot. My Response 6-Axis articulated robotics are becoming increasingly common because of the following reasons: 1. They can perform complex movements – This allows injection molders […]

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 […]

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 […]