Before I set out to build my own vacuum former I did alot of research on various DIY sites. I found alot of helpful tips and designs. Ultimately I settled on components from several different designs. My design is by no means perfect, but it gets the job done, and was fairly cheap to build. It is capable of forming a piece 33" x 22".
Step 1: Basic Box
I started with a basic five sided wood box out of half inch particle board. This will be the infrared "oven". 24 inches deep, 35 inches long, 24 inches wide. Thats pretty straight forward.