Wanted to post this to show everyone what they can do with a 3D printer and a desktop vacuum former 
The mold was printed in Rigid 4K on our Form 3 
I have more details/context on my blog post for those who are curious: Vacuum Forming & 3D Printed Molds — Ember Prototypes | 3D Printing Vancouver, Rapid Prototyping, Engineering Design
Can’t you use cheaper resins like Draft for such cases, since you don’t need the actual part for its mechanical properties?
For longevity of the mold it’s better to use a stiffer resin and one with higher temperature resistance.
Nice job !
I have used even FDM 3D printed molds for vacuum forming. We found that FDM 3D printed molds from ASA or similar material was good enough, fast and cheap way to make some initial testing.
Do you 3D print the Vent holes in the Mould or do you drill those afterwards?
I make a lot of prints with a 1.2mm hole through them for adding a strengthening metal rod to them after printing.
I just print them straight in the mold!
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