If memory serves me.... .06 inch diameter X roughly 10 inches long multi-curved passages out of SL5180. We used a standard multi-strand wire with plastic insulation (can't remember the gauge) to push the resin thru and cleaned up with a syringe and alcohol. I experimented with one of DSM's faster resins but found that it tended to gel in the passages and wouldn't clear. For nearly straight passages, you could probably go down to diamater .01 - .02 since you can clear with piano wire or drill bit. Any smaller and it may gel across due to residual chemicals from the too-near reaction.
Disclaimer: Engineer and out the other!
Michael W Miller (firstname.lastname@example.org)
The Boeing Company MS 17-PE B-XT65
Propulsion Experimental Hardware 206-655-3289
Rapid Prototyping 655-4366 Lab 655-4365
> From: Beth_P_Israelnaim@bd.com[SMTP:Beth_P_Israelnaim@bd.com]
> Sent: Wednesday, January 05, 2000 10:35 AM
> To: email@example.com
> Subject: Aspect ratios for holes in SLA
> Dear RPML Friends,
> I am currently building some small parts with small diameter holes and have run
> into somewhat of a problem cleaning the liquid resin out of these holes as the
> length of these holes get longer. This problem has lead me to wonder two
> 1. How small of a hole are other users able to build on their SLA's and on that
> smallest diameter hole you can build, what is the length of the span that the
> hole can travel and still be cleaned out. What SLA system are you using and
> what resin are you building with?
> 2. Has any University or Consortium project evaluated the different systems and
> their resins/powers to see what aspect ratios can be achieved with the different
> resins/powders and their viscosity's and or particle size?
> Thank you in advance for any information you can share. If there appears to be
> enough interest I will tabulate and share the results with the RPML.
> Beth Israelnaim
> RP Specialist
> BD Technologies
> P.O. Box 12016
> RTP, NC 27709
> For more information about the rp-ml, see http://ltk.hut.fi/rp-ml/
For more information about the rp-ml, see http://ltk.hut.fi/rp-ml/
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