Search found 84 matches

by sgraber
Wed Mar 26, 2014 8:51 am
Forum: Vat Design and Construction
Topic: Possible pdms vat refresh method
Replies: 12
Views: 21782

Re: Possible pdms vat refresh method

HTL: Could you re-run your experiment and not do the pressure pot step? It would be very interesting to see if cleaning the surface with IPA followed by the vacuum-only step would yield the same results. It's possible that through use the PDMS is absorbing a bit of resin/monomer and that the vacuum ...
by sgraber
Sun Mar 23, 2014 10:58 am
Forum: 3d Prints
Topic: The Tiniest Knight
Replies: 5
Views: 9971

Re: The Tiniest Knight

by sgraber
Sat Mar 22, 2014 2:20 pm
Forum: Hardware showcase / Build Logs
Topic: DIY DLP printer + FEP foil / Utrecht
Replies: 26
Views: 69036

Re: An other DIY SLA DLP printer

Heat Resistance of PMP from that link:

"The non stickiness polymethylpentene film can be used in a high temperature range of 200°C. Since the melting point of TPX is approximately 230°C (446°F), the film can be used in any process even at 200°C (392°F) adequately."

Should work.
by sgraber
Mon Mar 17, 2014 2:01 pm
Forum: General
Topic: PDMS vs TEFLON
Replies: 9
Views: 18051

Re: PDMS vs TEFLON

The reason the PDMS works well is that it is gas permiable and the resin won't cure in the presence of oxygen. A very thin layer of uncured resin exists so there is no mechanical bond. Teflon doesn't share this property but is pretty slippery stuff and is more durable. I pondered using the PDMS to ...