That is the point of this thread...Quote:
Originally Posted by LambdaFF
Like I noted in an earlier post,
It looks like 3Dsystems makes a producte that when post-cured and heat treated can achieve a Heat Deflection Temp (HDT) of 513°F (267°C)
http://www.3dsystems.com/sites/www.3...uestone_US.pdf
Interesting read:
http://www.dsm.com/content/dam/dsm/s...t.pdf?download
Quote:
Originally Posted by Overlord475
You reckon? Personally a page that wants all my personal details doesn't fit into the "interesting" category. :)
Yes but you didn't want to use a super expensive industrial machine :-)Quote:
Originally Posted by Overlord475
so what you want are the melting temps for standard desktop uv resins.
Dang, was hoping that would be a direct link after putting in my info.Quote:
Originally Posted by Mjolinor
True, wasn't sure yet what machines the 3Dsystems' (Acura Bluestone) or Somos' (PerForm) high temp resins would work in.Quote:
Originally Posted by curious aardvark
Even if you found a SLA material that would handle the temperature, that wouldn't mean it would make a suitable mold for plastic injection. Injection molds have to be tough, strong, and release easily. I doubt that many SLA materials would qualify. It seems you'd be better off printing a positive part and making the mold from it using proven technology, such as a steel-filled epoxy material. Here's some more about the process: http://www.moldmakingtechnology.com/...uction-tooling
Andrew Werby
www.comptersculpture.com
This has been done a number of times over the last 15 years or so
https://www.google.co.uk/search?q=ch...reolithography
As for Bluestone, I've successfully laminated over it at 185C without a thermal post-cure.
A post-cure will elevate its use temp and stiffness at temp to a degree, certainly worth experimenting with.
Not sure about the prices mentioned in a previous post though. All of the filled resins are on the expensive side and process somewhat slower than conventional resins.
I looked at that article: https://www.researchgate.net/publica..._mould_tooling
and it didn't exactly convince me that direct injection into SLA molds was the way to go. First off, they used a SLA machine that could build parts in epoxy, which is a rare thing; most can't. Second, they just printed a shell, backed it up with aluminum-filled epoxy to draw off heat, and inserted it into a conventional steel mold. Thirdly, it didn't seem to work all that well - "flexural stress" was cited as the major cause of failure. Given that the test parts they used were extremely simple in shape, one would expect more complex ones (that would make more sense to use this method on) to exhibit even worse behavior. Even if you could make this work to some degree, without a major improvement in SLA materials I'm not seeing it as a viable process in industry.
Andrew Werby
www.computersculpture.com