http://youtu.be/-t6cxIeCIjE
Anybody know what kind of material they are using for the tools? It looks like a super high density foam or something.
Tooling boards
http://www.axson-technologies.com/en/find-product/Machinable-Products/Modelling-and-Tooling-Boards
http://www.curbellplastics.com/prototyping-tooling/tooling-boards.html
http://www.nuplexconstruction.co.nz/pdf/Huntsman_Tooling-Systems.pdf
Thanks! Exactly what im looking for.
i think that would be THE job to have.
Don’t forget that if you use a urethane foam and post cure in an oven and have a thermal run-away you will produce toxic hydrogen cyanide gas.
Seriously?? I dont think we will do a post cure, but that is good to know.
Definitely. That’s the biggest downside to using urethane tooling. The second is the expansion issue. High coefficient of thermal expansion while molding and also dimensional creep (size usually grows over time, especially with lower density foams).
These foams are great for bucks though where you’ll do a room-temp splash to create your high-temp/dimensionally-stable mold.
Could you tell which is this temperature? I made molds with glass, paper honeycomb cells filled of polyurethane
Regards
Look up the ignition temperature in the material safety data sheet (MSDS) of your specific foam.
I’ll ask the company about the toxicity. I’m looking at to supply the foam.
Using epoxy tooling board instead of urethane will sidestep the gas issue.
Usually people make composite tooling from the boards at low temperatures and then postcure the tooling freestanding. The final components are then made from the composite tooling.
Looks like Red bull were using the boards as tools for the wind tunnel models but for the final parts on the car composite tooling is probably used.
I noticed this too, I was at first confused to see the gloss finished outside apparently coming straight off the release film etc. It was obviously a part that had been finished up on the outside. Makes sense now that they would just use tooling board for the one off model parts.
Why would they do carbon parts for the wind tunnel? That looked like the real deal to me. The wind tunnel model was made using the rapid prototyping machine.
I was just assuming that the tooling boards wont take the cure temperatures of the structural prepreg systems used on the car.
If some of the non-structural prepregs used are low to medium cure temperature I guess the boards can be used.
We have a new high temperature tooling board. The new materials solve the temperature and expansion problems found with epoxy and urethane tooling boards allowing a full cure in one autoclave cycle thus eliminating post curing. Visit www.compotool.com for more details.
We use these high density foam tools and don’t have too much issue. Though we tend to cure on the lower side to avoid excessive expansion or any possibility of heat deformation. Stuff works pretty good, it’s easy to machine and good for shorter runs.