Here is additional information about the material I recently mentioned.
In-house we refer to it as our "dielectric" material.
The material is fairly strong, but not ductile. Based on the published
properties of the sand and the epoxy binder, we believe it can withstand
continuous use at 300C, but we haven't performed long-term tests at elevated
temperatures to verify this. There are two cross-linking cycles we can use
for the epoxy -- one which gives it better high-temperature strength. Thus,
if we knew that the end-user was going to use it near its maximum working
temperature we would use the cross-link cycle that gives it better high
temperature properties.
As far as strength is concerned, preliminary data shows that its tensile
strength is 9800 psi and its tensile modulus is 960ksi. Its ductility is
only 0.10%, though. This compares to DTM's polyamide material with a
strength of 6400 psi and a tensile modulus of 234ksi. Its ductility is 9%,
though. Thus the dielectric material is stronger and more stiff than
DuraForm polyamide, can withstand much greater temperatures, but does not
have the elongation.
The material is not currently available commercially for you to buy and use
in your SLS machine, but we would be happy to build parts for you.
_________________________________________________
Dr. Brent Stucker, Director
Rapid Manufacturing Center
University of Rhode Island
Dept. of Industrial and Manufacturing Engineering
Gilbreth Hall, 2 East Alumni Ave.
Kingston, RI 02881
ph: (401)874-5187
fax: (401)874-5540
stucker@uri.edu
web: http://www.egr.uri.edu/ime/RMC
ftp: rmc1.ime.uri.edu (anonymous login)
-----Original Message-----
From: w.backers@ind.tno.nl [mailto:w.backers@ind.tno.nl]
Sent: Tuesday, January 11, 2000 10:51 AM
To: stucker@uri.edu
Subject: RE: Looking for a high temperature resin
Dear Mr. Brent,
i am really impressed if the part can resist at 300 Celcius degrees! But can
you tell me more about the properties of this material like mechanical
strenght, surface quality ect. Can you compare it to Pa glas filled from
DTM?
About the temperature, you are talking about continuous or heat reflection.
Are you making the material for yourself or can you buy it.
Thank you very much,
Ing. W. Backers
TNO Industrie
The Netherlands
+31 15 2608 889
> -----Oorspronkelijk bericht-----
> Van: Brent Stucker [SMTP:stucker@uri.edu]
> Verzonden: dinsdag 11 januari 2000 15:34
> Aan: bolson@molex.com; rp-ml@bart.lpt.fi
> Onderwerp: RE: Looking for a high temperature resin
>
> Bob,
>
> I am not sure what your intent is, but we do have a material that we
> make using Selective Laser Sintering that can withstand temperatures
> as high as 300C. The part we make is a ceramic-filled epoxy part.
> It is basically a fine-grained sand-casting sand with a thermosetting
> binder. Because of the fine grains, we are able to achieve excellent
> resolution on small parts and features. The material also has very
> good dielectric properties and is resistant to corrosive
> environments as well. We have had customers who have found this
> material to be the only viable way that they could use RP to prototype
> their parts. If you are interested, we would be happy to quote parts
> for you.
>
> Brent Stucker
> _________________________________________________
> Dr. Brent Stucker, Director
> Rapid Manufacturing Center
> University of Rhode Island
> Dept. of Industrial and Manufacturing Engineering
> Gilbreth Hall, 2 East Alumni Ave.
> Kingston, RI 02881
> ph: (401)874-5187
> fax: (401)874-5540
> stucker@uri.edu
> web: http://www.egr.uri.edu/ime/RMC
> ftp: rmc1.ime.uri.edu (anonymous login)
>
>
> -----Original Message-----
> From: owner-rp-ml@bart.lpt.fi [mailto:owner-rp-ml@bart.lpt.fi]On Behalf
> Of bolson@molex.com
> Sent: Monday, January 10, 2000 5:29 PM
> To: rp-ml@bart.lpt.fi
> Subject: Looking for a high tempurature resin
>
>
> Hello all,
>
> Could someone tell me if there is a resin that can withstand a
> temperature of 230 C for 60 seconds. Also if there's a resin that
> can
> go higher I'd also like to know this as well.
>
> Thanks,
>
> Bob
>
> 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/
For more information about the rp-ml, see http://ltk.hut.fi/rp-ml/
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