Dumping research links… write up coming…
Designs and Builds
- Instructables: Make A Good, Cheap, Upgradeable Sheet Plastic Vacuum Former - great write up on the “one hole” method
- RCGroups: hole sizing and spacing- 1/16" diameter on 1/2" spacing, but later comments recommend the “one hole” approach. Also to put buck on blocks- so vacuum can get under the buck.
Emissivity numbers are often an “average” across a (wide?) range of temperatures. Can be quite a range. Look for specific emissivity for target temperature.
Conductivity is also influenced by temperature? (Note- I don’t mean the temperature differential, need to look up if conductivity is average temperature dependant.)
Material Tips and Tricks
- Can you Vacu-form PET-G with the protection covering? – No
- put buck on (small) blocks
- consider adding holes through buck so vacuum can get “through”, especially in low areas