Nice guide to problem-solving when designing SLS 3D printed parts


3Dsystems-SLS-design-guide

This process is a good way to make parts and prototypes that can be handled roughly.

Surface finish and mechanical precision is not as good as some of the precision processes, but post-printing processes like polishing and dying can make a big difference to appearance.

The guide is here, and I recommend having a look at the novel way suggested to make a screw thread that is not over-frictioned by the somewhat rough as-printed surface (see diagram).

Actually, I recommend reading it even if you are not printing anything – there is a lot of neat stuff in there.

For example, would you believe, good way to get the worst of the un-fused printing powder out of large hollow voids inside a print is…

  • Before printing: design a floating chain running through the hollow voids
  • After printing, pull the chain out – which will drag lots of powder with it

BTW, the prints are also porous – see here for sealing suggestions (one of which is in the guide above).

 

 



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