The customer was using patterns made on DWS rapid prototype machine.
I believe he used R & R Plasticast investment. He cast both karat
gold and platinum using the coating material and had smoother cast
surfaces on both materials. Sorry, I didn’t do the testing, just
passed on the about the coating material.
Some good on burning out RP resin patterns was presented
in a paper at the 2007 Santa Fe Symposium entitled “Improvements in
the Burnout of Resin Patterns” by Dr. Ian McKeer at SRS Ltd. in the
UK. They were experimenting with Rapid Fire burnouts. GoldStar
Investments has a Rapid Fire burn out schedule for their Omega+
investment on their website. A number of people I’ve talked to have
tried the Rapid Fire burn out on Envisiontec patterns and said the
surfaces were better but not perfect.
United Technical Dept.