This interesting query was emailed to me the other week… JM Plastic vs Brass Baffles? Do spiral baffles add any cooling efficiency? My Response The plastic baffles are new, and the jury is out… I can see the obvious benefit of not stressing the mold base as they are installed, as well as the textured […]
Monthly Archives
July 2011
Transition Zone Length for Amorphous Polymers…
I was asked this question via email the other day… JP We process a large amount of amorphous polymers including ABS, PS, and PC. We are looking to purchase come new screws for these materials, the screw manufacturer suggests using nearly half the screw for the transition zone, does this make sense? If so, Why? […]
Optimal Baffle Length…
This was a second part of a question I received the other day… Jim What is the standard baffle length to baffle channel length? How much clearance at the between end of baffle and bottom of channel? My Response There is no standard for baffle length, though it is critical that you balance the baffle flow (and […]
Distributing Handouts…
I was recently in a discussion with a fellow instructor about how annoying it was for people to be reading ahead while he was trying to teach… Bob How do you keep the attention of student who like to read ahead of the presentation? My Response Although there are many reasons why people start reading […]