by dayzombie » Wed Feb 06, 2013 3:21 am
I'm new here, so please bear with my ignorance and forgive errors of protocol! I have done some simple filled polyester casting using a vacuum chamber, but not for some years. I have been asked to produce letter stamps for impressing in clay, which can be stiff enough to need a tap with a mallet to make an impression. The easiest way to make the moulds is for me to carve them in wood (I'm am much more competent at carving than casting, believe me). The letters, about 20mm high, would them be sanded flat on their backs and mounted on wooden sticks to aid use. I doubt ordinary filled resin would be strong enough, but could I get away with some kind of toughner in the resin, if this does not make it too brittle. Otherwise I have seen urethane resin, which claims to be really tough; would this be a better bet? If none of these will work I guess I had better start looking at low melt alloys?