I am Garrett Gordon, i work for a company that specializes in two part polyurethane casting. please check us out at www.masterpiecemodels.com
the process your about to embark on is somewhat tricky!
are you trying to establish the ability to use these processes frequently?
i am more than willing to help you get started but i can tell you there are many irritating obstacles when it comes to production.
we are one of the largest polyurethane casting facilities in the Pacific northwest. i can definately point you in the right direction.
what you will be dealing with is a two part urethane, these parts are usually mixed 50%-50% by weight or volume, depending on the material. now the media used for the mold is important as well. urethane master molds are used from time to time but silicone molds capture the most detail and release from complex parts much easier. temperature only effects the cure time, usually at room temperature after a thurough mix of side A and side B you have just under 3 mins working time to get the material into the molds before it begins to harden. next is important, the majority of the time the material will always have bubbles trapped inside. this is where a pressure chamber is needed. while the mixture is still liquid the mold needs to be pressurized to 40-80psi depending on the level of detail required. you dont always need a pressure chamber but believe me it helps! the process itself if going to be a learning curve of trial and error. each part needs to be poured and prepped a little differently.
if you need any advice or pointer along the way, or if you would like us to handle your production after you make the molds let me know!
contact me anytime at