Need to make a large number of these small metric spacers.

Building them in the SLS 3D printer is not a problem, but harvesting them from the build cake is troublesome!

Check out the VIDEO here!

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The idea is to nest the spacers together inside of a cage that will contain them when trying to separate the spacers from the

un-sintered powder.

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Here you can see the build cage containing all of the

Spacers. The spacers are all nested in 49 x 7 array

And the cage is assembled around the array of parts.

The cage and lid have a 0.030” gap between all of the

 mating surfaces so they don’t adhere to one another

during the build process. There are 4 pins, one on each

side that keep the cage and handle from coming apart

until you release them. This facilitates doing a thorough

 job cleaning the parts with compressed air without

losing any or having to handle them by hand.

Check out the VIDEO here!

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individual spacer cube asm2

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The cage and handle separated exposing the individual cleaned spacers ready for use. The hole in the handle allows you to blow compressed air in through the handle during the cleaning process. After cleaning the parts, I don’t think that neither the handle nor the hole is necessary at all. Maybe I’ll change the original design to incorporate a perforated lid without a handle.

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Exploded assembly view

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The part dimension should be 6mm long by 6mm diameter and 3.2 mm ID. These parts easily fall within the tolerance needed for this part. Further cleaning and glass beading would probably yield even closer dimensions.

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Here you can see the cooled SLS build chamber removed from the machine and the assembly being removed from the build cake.

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