Fab Academy at AS220 Labs

January 15, 2010 11:25 AM

Molding and casting a flexible coupling

by Noah Bedford

Jonathan's machine uses flexible couplings:

DSCN1618.JPG

I decided to make one for molding and casting, first, I drew it in Inkscape:

coupling.svg

Further edited it in the Gimp, part 0:

coupling.png

Part 0 was cast entirely in urethane rubber, here it is next to the part it's based off of:

DSCN1612.JPG (this was popped directly out of the wax mold)

Part 1 is cast in hydrostone (though I'm going to test urethane plastic as well), here's the wax master mold:

waxmoldpart1.jpg

Which broke when I removed the urethane mold:

DSCN1616.JPG But the urethane mold itself is okay: DSCN1614.JPG

Here it is filled up with hydrostone:

filledpart1.png

Alright! More updates after the parts dry.

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