On Wed, Apr 06, 2011 at 10:19:16AM -0500, Igor Chudov wrote: > I did an experiment. I took a 1/4" thick piece of junk Lexan, and beat it > with a steel bar. The Lexan piece would not shatter. It is supposed to be > bendable cold, but I do not have the facilities to do this. > > I bend mine with a gas torch. I learned how to be careful with the torch, to > avoid most surface bubbling. I still get some bubbles, but not too much, and > it is just fine for a mill enclosure. I tried a plastic heating strip, it > was not hot enough for 1/4" Lexan.
That sounds safer to this nervous Nellie, but Wikipedia shows "Elongation (ε) @ break 80–150%". Such toffee-like behaviour should be good for cold bending. It does also say Tg (glass transition temperature) for polycarbonate is 150 °C, but as it's more like (tough) toffee than (plexi)glass, then it won't just shatter. Given a Tg of 150 °C, I'd venture that a 10 minute soak in boiling water could ease the bending, without bubbling, and reduce springback of the 1/4" polycarbonate. (May help those of us who "do not have the facilities to [bend it cold]") Anyhow, them wot's done it are the experts. I just hope they stood well back the first time. :-) Erik ------------------------------------------------------------------------------ Xperia(TM) PLAY It's a major breakthrough. An authentic gaming smartphone on the nation's most reliable network. And it wants your games. http://p.sf.net/sfu/verizon-sfdev _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
