souls to lose in composite material for the production of hollow bodies of composite material

摘要

the invention is applicable in the production of hollow bodies of composite material; the purpose is to make use of plastic materials (acrylic resins, polyurethane, polistireniche, etc.for the construction of forms to lose instead of plaster currently used.the methods used for the production of these forms to lose are related to typical technologies of plastics, injection, extrusion, blowing, heating and shapingetc.; the main features of these forms are: lightness, simplicity of construction, ease of extraction from the inside of the body cavity.