Vacuum Forming (videos)

Vacuum forming is a technique of using negative pressure to pull a sheet of softened plastic (usually) over a form to produce a smoothly molded part. It can be tricky to get right, but the basic tools are readily built in the home shop. Watch these videos for a good introduction to the process:

Homemade vacuum forming a helmet by uiproductions
https://www.youtube.com/watch?v=50-sR54UBgY

How to build a vacuum forming machine including my easy heating solution by James Bruton
https://www.youtube.com/watch?v=maH5Ech0wK8

How to make a simple vacuum former by I Like To Make Stuff
https://www.youtube.com/watch?v=uMbX3bqfzsk

How To Vacuum Form in 3 Easy Steps by WidgetWorksUnlimited
https://www.youtube.com/watch?v=I3LVPRHmkcU

Home-made Vacuum Forming Rig by omegageek64
https://www.youtube.com/watch?v=2BR9aayq-tw

Homemade Vacuum Forming Plate by electronicsNmore
https://www.youtube.com/watch?v=Nrfh9NBdx-o