this invention finds application in the field of the establishment of models of type a.in this field, the present technique for plaster models focus on plates of plastic material.the found, while maintaining the principles and technologies currently adopted, allows to solve some problems related to inaccuracies in the contact between the plaster and the plate.the innovations are mainly in the adoption of a metal base which is supporting the plate and the introduction of three should distanziatrici in the upper part of the frame.the result of the combination of these new features is the ability to achieve, with plates of various sizes, models of high accuracy.both in relation to the contact between the cast and the core that the perfect coincidence between the axes of the holes machined in the plate and corresponding to the plaster mold.
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