Hi all,
After some information and advice. I have been doing my own resin casting to try and produce high quality resin masters for spin casting to produce metal copies of my sculpts to sell. I think Im almost there on getting it right but I have had a couple of hiccups and want to try and Iron them out. B4 I go in to full production.
Because I sculpt in fimo this is the best process to go through. As a resin master is the closest representation of the original sculpt.
Main problem Im having is casting the resin masters. Im doing it under pressure of about 50-60 psi which is giving me reasonable casts. But the main problem Im having is way too much flash to clean up. What can I do to go about getting an almost seem less cast?
The process I go about casting is, I clamp the moulds with rubber bands in between 2 pieces of wood. And I inject the resin through the spout with a syringe then place it in the pot under pressure to cure.
I this caused by a problem when Im making the silicon mould?
Should I be using a tougher silicon?
The other is I need a higher temp resin I have been using 4PU and Easycast from Barnes. These have a HDT of around 75℃. The vulcanisation temp is close to 150℃, the 4PU and Easycast almost go the distance and produced a reasonable metal cast. I have been considering using TC852 which has a head Deflection of around 104℃.
Any help would be awesome.
Or if there is anyone willing to do the silicon moulds and resin casting in Australia for me,as Im really looking at out sourcing this part of the process. Means I have more time to sculpt, and run other parts of my business.