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Subject: 
Re: Liquid Plastics
Newsgroups: 
lugnet.parts.custom
Date: 
Fri, 27 Aug 2004 02:40:46 GMT
Viewed: 
8939 times
  
In lugnet.parts.custom, Bianca Nebab wrote:

> Some parts can be replicated fairly well, however, any piece requiring a lot
> of under cutting (e.g, studs) can get complicated, since air bubbles result
> in the undercut areas unless you create proper air channels to allow trapped
> air to escape. Air channels in turn result in extra flak that has to be
> trimmed off and finished, etc.

For parts where studs cause these problems, have you considered casting them
upside-down?  Then the plastic will flow into the stud compartments by gravity,
and the bubbles will all float up to the rim of the part.  Add a few flow
channels to the outer rim and the interior tubes/rods, tip the part a little bit
so all of the surfaces slant towards the flow channels, and all you have to do
is trim/file/sand the underside flat.



Message is in Reply To:
  Re: Liquid Plastics
 
(...) I use Smooth-on liquid plastics regularly with my other toy hobby, making custom action figures. The problem with using them to make LEGO-compatible parts is that these liquid resin plastics (like Alumilite, Micro-Mark, etc) are meant to be (...) (22 years ago, 26-Aug-04, to lugnet.parts.custom)

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