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Old 05-09-2016, 07:34 AM
billfunk29 billfunk29 is offline
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Default Foam bucks

I attended another fantastic meet on Route 56. Thanks Dan, for hosting. We had a conversation on buck building. I was surprised that no one had heard of a company called "Smooth on". They have great products for making bucks and tooling.
https://www.smooth-on.com/product-line/epsilon/
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Old 05-09-2016, 03:00 PM
Mike Motage Mike Motage is offline
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I think working with is a great way to go, especially because it works so quickly. And the ability to brush on bringing a surface up/back up makes this a very user friendly medium.

Thanks for bringing this up!
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Old 05-10-2016, 12:17 AM
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red baron red baron is offline
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Could you explain for the people who weren't there?
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Old 05-10-2016, 07:52 AM
billfunk29 billfunk29 is offline
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Default Foam bucks

WE didn't do a demo last weekend. Just a discussion on how to make a buck more quickly, especially if you only need it for one part.

Basically you can pour or laminate foam insulation and carve it to shape. Usually by hand, blended to some existing shape. However, with digital data a router can make fast work of shaping foam with extreme precision.

The problem with foam is that it is easily damaged. That is where Smooth on comes in. They make paint on coatings that will protect the foam with little change to the shape. A hard shell.

It is easy to cut access holes anywhere you need them. I will see if I can document a sheet metal project if I get some time.

The videos and tutorials on the Smooth On website give some ideas of what can be done.
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Old 05-11-2016, 09:42 AM
crystallographic crystallographic is offline
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I have used some foam products - 2part sprays and different foo-can types.

With some of them, after they set up and are carved/sanded to shape, fiberglas gelcoat may be mixed and rolled or brushed on to harden up the surface - after first coating the foam with a neutralizer or shield like the one mentioned previously.

We used to joke around in the shop when mixing fiberglas for various jobs, and hand some new guy a foam coffee cup with freshly mixed gelcoat resin poured in. Smoke would start coming up after a minute, soon followed by dramatic meltdown of the cup.

An industry-wide machinable type of tooling foam is cast to rough shape and then machined to dimension and then hard-coated, like these tools from Lockheed Martin, Palmdale:

P1110513.jpg
Lockheed tooling_machined foam.jpg

Unfortunately for this thread, I do not know where this is sourced or anything about it, yet.
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Old 05-11-2016, 04:19 PM
billfunk29 billfunk29 is offline
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Default Ren shape

Thanks for sharing Kent. You get to work on the coolest stuff.
It looks like Ren board to me. Nice stuff but $$
http://www.paramountind.com/pdfs/Hun...gBoard_MDS.pdf
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Old 05-11-2016, 07:21 PM
crystallographic crystallographic is offline
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Quote:
Originally Posted by billfunk29 View Post
Thanks for sharing Kent. You get to work on the coolest stuff.
It looks like Ren board to me. Nice stuff but $$
http://www.paramountind.com/pdfs/Hun...gBoard_MDS.pdf

Hi Bill,
It may look like the Renboard, but these tooling parts are cast and then machined - otherwise the Renboard would have to come in giant 40" X 35" X 65" blocks ....? Because no visible joint lines, anywhere - unlike the 36" X 36"X 12" Renshape 5166 bonded and machined forms I have used previously ...
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