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Put the nut in a strong chamber, then use high pressure air on the
outside of the nut. When the nut cracks, the air pressure equalises on
each side of the shell. Bleed off the pressure and remove.
High pressure air could be provided by hand pump but also could use
a small explosive.
Inspired by MB's nutcracker idea.
Intelligent_20nutcrackers
[Ling, Dec 22 2015]
Fire piston.
https://en.m.wikipe...rg/wiki/Fire_piston
[Ling, Dec 22 2015]
Ahem
Self-shelling_20nuts
[MaxwellBuchanan, Dec 22 2015]
Pecan cracker
https://www.youtube...watch?v=zGSR8t0bYRw
[bhumphrys, Dec 22 2015]
Hypobaric Nutcracker
Hypobaric_20Nutcracker
[mitxela, Dec 23 2015]
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Annotation:
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Actually it could use a similar technique to that of the fire
starters that get hit with a hammer. Link for that coming. |
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Nut shells are porous, so the rate of rise in pressure would have to be very fast relative to the diffusion rate. |
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Explosive decompression might be better, as then the air inside the shell will push the casing fragments away from the kernel. |
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Better still would be to place the nut in a pressure vessel containing a stoic fuel gas/oxidiser mixture and allowing it to equilibrate, then provide a suitable ignition source. The shell would literally be blown away from the kernel, which being relatively incompressible would sustain an acceptable level of collateral damage. |
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Diesel nutcracker, hmmmm..... |
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Much better than the title might have implied. Just
glad you haven't developed a similar device for cats. |
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Would it work on pecans, I wonder? Those are the worst.
Trying to pick out the little bits is frustrating at best.
Something must be done. + for effort. |
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I agree with [8th], that to gradually add air pressure to the
chamber holding the nut, and then allow the air to
explosively decompress, should shatter the shell nicely.
Might even work for Brazil nuts. |
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// Just glad you haven't developed a similar device for cats. // |
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<coughing and sniggering> |
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Have you ever tried this technique in the link I wonder [Bliss]? |
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A design using isotropic implosion would be excellent, just like "Fat Man" but without* the plutonium, or the tamper. But still using explosive lensing, just on a tiny scale, suitable for walnuts, or even hazelnuts ... |
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*Maybe just a little bit, for authenticity ... |
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The best way to crack pecans (which Americans seem
to pronounce as "pecans", as opposed to the English
pronunciation of "pecans") is just to squeeze them in
a clenched fist (I suggest your own). That cracks the
shell without crushing the nut. |
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Well, well, who'da thunk it....? Nicely done. |
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[bhumphrys], even that seems like more work than I like to
do to get a pecan. I'm good just opening the bag. It's not like
they taste better fresh out of the shell. Just give me a bag,
and sharp pointy thing to open it with, and I'm good. |
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I'm sure there used to be a barometric or similar nutcracker on here before that proposed using a sudden vacuum to explode the shell (perhaps a precursor of [max]'s idea). Can't find it now though. |
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That'd be the hypobaric nutcracker <link> |
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You know, if any of these pressure-based nutcrackers actually work, especially the hypobaric exploding one, you wouldn't need to own a nutcracker at all. Just pressurize the nuts at the factory and sell them in a high-pressure cannister. When you open the can, all of the nuts crack open on demand. |
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Of course maybe you don't want them all to crack at once, so you'd probably have each individual nut in its own pressure can. Which might get tedious, opening a can before every nut. Perhaps we could invent some kind of pliers-shaped device to assist in nut decanning. |
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//Just pressurize the nuts at the factory and sell them in a high-pressure cannister// |
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Spray-on nuts in their shells! |
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// you'd probably have each individual nut in its own
pressure can // |
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No, just an air lock so you can remove them one at a time. |
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