| abstract |
An object of the present invention is to provide a method of integrally molding a resin model having a complicated shape and having a complicated hollow portion inside. SOLUTION: The two-component reaction-curable soft urethane resin liquid A is mixed with expanded polystyrene fine particles B, cast into a core mold C having a concave portion corresponding to the hollow portion, cured, and removed. Forming and forming a disappearing core D having a shape corresponding to the hollow portion: positioning and installing the disappearing core D in a resin model mold E having a concave portion corresponding to the outer shape of the resin model. Casting and curing the two-component reaction rapid-curing urethane resin liquid F, demolding, and forming a resin model G containing the disappearing core D: and disappearance in the resin model G The foamed polystyrene-soluble organic solvent H is injected into the core D to dissolve the foamed polystyrene fine particles B, the dissolved solution is removed, and the cured product I of the two-part reaction-curable soft urethane resin liquid A is removed. Pull out and remove to make the resin model Consisting of. [Selection diagram] None |