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Stemer114

Printable parametric mold for oogoo feet for reprap printer

by Stemer114 Jun 22, 2013
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I recently tried ogoo myself. Freshly made it sticks to PLA but after
curing it does not at all. By pushing small oogoo pieces into a prints
crevices instead of pushing a whole print into a block of oogoo
air-bubbles can be completely avoided. This is perfect for mold making
for poly-urethane or other resins and excellent for making hundreds of
board game pieces or other useful small identical parts.

I found
that even quite a bit of starch excess is possible. In fact so much that
the mass rips on the edges when you squeeze it and crumbles when you
stir it gently. You'll believe that it will crumble after setting but
it does not. This gives harder pieces (similar to and usable as eraser).
Also adding fir oil covers up the unpleasant vinegar odor quite well
and adding a droplet of magenta acrylic paint gave me a fine grained
inhomogeneous dotted appearance. (It looked like the stuff that comes
out
in a liposuction)

Do you think the feet will be durable enough?

Well, I have to admit that after I found out about oogoo about a week ago I have gotten carried away just a little bit by the possibilities without thinking too much about technical feasibility..

So far, I have cast feet from cheap grey silicone oogoo and "professional" (self-characterisation on the cartridge) transparent silicone oogoo. The former (see grey/green castings in the pictures) seem to be a bit softer than the latter (see magenta/red foot in the last picture).

Therefore, the source materials and mixture of the oogoo would be one influencing factor.

Apart from that, one could change the dimensions of the foot in the scad file, ie making P1 larger and/or P4 smaller and/or reducing spoke count should give a stiffer foot by comparision.

Dear,

What are you thinking about durability one year after ?

thanks !

After more than a year, the feet are still mounted under my printer and seem to be working ok. They have become noticeably stiffer, though. I guess one should try to minimize the starch content when making the ogoo. In my experience, the ogoo cures quite quickly even with a low starch content (1 tblspoon for a plastic cup of silicone caulk) - at least if it is mixed thoroughly.

Anyways, I have kept the mold for the feet around and whenever I had excess ogoo from other experiments (like http://www.thingiverse.com/thing:313006 ), I used it to more feet. Therefore, I have now several years of supply of these feet in many different colors now..

Printable ogoo mold for making RC car traffic cones (pylones)

Thanks. It looks like they would be good feet for something that isn't too heavy. Especially for setting it on a delicate surface. I've printed with nylon a little and think it might be a good material for feet that need to be a little more durable or are supporting something heavier.

Great idea! Well done! Oogoo and 3D Printing are like bread and butter!