YES, WHEN THE PLASTIC IS HEATED IT BECOMES SOFTER AND MORE PLIABLE, BLASTING IT WITH COMPRESSED AIR QUICKLY COOLS IT AND LETS IT "SET"...VERY SIMILAR TO SHRINKING STEEL PANELS WHERE YOU HEAT THE METAL TO EXPAND THE MOLECULES AND QUICKLY COOL IT TO SHRINK THEM, REMOVING THE EXCESS OR "BUNCHED UP" METAL.
Sorry about the caps, but I'm not going to go back and retype it
Sorry about the caps, but I'm not going to go back and retype it