how would I create styrofoam? Answered
I am investigating th' lost foam casting technique and one of th' problems is th' surface texture of carved foam !
I know that large scale mfg's of cast alloy parts make foam patterns by injecting foam into a permanant (female) mold and then use th' foam pattern to cast th' part ! This gives th' cast part a very fine finished surface with no need of machineing (except for fitting to another component )
I'd like to know how they create and manage th' foam !