Introduction: Easy Oogoo Miixing With Printed Auger

Oogoo ( https://www.instructables.com/id/How-To-Make-Your-Own-Sugru-Substitute/ and https://www.instructables.com/id/7-Things-To-Fix-Or-Do-With-Oogoo/ ) is great stuff! Inexpensive, easy to mold, easy to clean up, quick setting, and makes parts with a nice soft yet firm feel to them. The only thing I don't like is mixing it up. Combining silicone and corn starch, possibly along with some coloring agent, is not easy. Messy, hard to get uniform, and the time taken eats into the working time for the Oogoo. There must be a better way.

Here's my answer. Use an auger to press the stuff thru some plates with holes in them. Minimal mixing is needed to just get the corn starch sort of wetted with silicone. Then inject it into the auger, turn the auger, and out comes uniformly mixed Oogoo, ready to mold.

Please see Thing84579 on Thingiverse.com for files and details to print your own.

Using your Oogoo Mixer:
The video shows how to use the Oogoo mixer. Here's a summary:
Sift the corn starch.
Assemble the auger and feeder.
Squirt about a tablespoon of silicone into the Feeder.
Spoon in some corn starch. (Exact quantity doesn't matter. I try for about 1 tablespoon of silicone and ½ to 1 tablespoon of corn starch.)
(As an experiment, I added some water color paint, which worked great. I want to try other colors.)
Mix the Oogoo a bit in the Feeder so the plunger can push it.
Push some unmixed Oogoo into the auger case and turn the auger. Be sure the opening mark is lined up again.
Push some more Oogoo in and turn again. If you push too hard, it squeezes out of the Feeder. No big deal.
Repeat until all your Oogoo has been pushed through. You should have some uniformly mixed Oogoo at the discharge end of the auger.
Pull out the plunger and reload with silicone and corn starch, if necessary.
When you have enough Oogoo mixed for your project, scoop it up and use it.

Cleanup:
Cleanup is easy. Let the Oogoo cure for 5 to 24 hours and just peel and rub the stuff off your feeder and auger. Happily, it doesn't stick to PLA plastic. ( I haven't tried ABS, but I expect it's the same story.) Use a dental pick or thin wire to clean out narrow openings.

When the Oogoo has set, open your mold and clean up the casting.

Plan your next Oogoo project, knowing you can do the mixing quickly and easily!

Comments

author
Bacchus36 (author)2015-03-12

Watching the video was interesting and enjoyable but I disagree that it's any easier than mixing by hand. I just finished a repair to a shower stall surround that required roughly 12 tbsp of silicone plus cornstarch. I did three batches of 4 tbsp each and each batch took less time than it took just to assemble your auger. I don't see the advantage, other than the fun of playing with the auger. Sorry.....

author
caitlinsdad (author)2013-05-05

Interesting. If the passing of the sieve plate is where the mixing occurs, the auger push not really mixing it, maybe just using a hand garlic press might work. Spoon a tablespoon of pre-mix in there and squirt.

author
doctek (author)caitlinsdad2013-05-06

Actually, the mixing is more complex than just pushing it thru the holes. The stuff is also tumbled by the auger as it passes thru. Not all the material can go thru a given hole, so there's lots of mixing action as some is pushed on to the next hole and beyond.

author
caitlinsdad (author)doctek2013-05-07

Maybe try a dual opposing corkscrew design like the burr coffee grinders. It really is hard to get a good mix.

author
doctek (author)caitlinsdad2013-05-07

That's the point of this design. It gives a really good Oogoo mix with little effort. I originally planned to have three stages. But two does such a good job, I didn't need to.

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