In order to solve the problem that the nose may be burned during the process of breathing fire, the 3 D scanning was used to reverse design and the 3D printing was used to manufacture. Firstly ,the nose curved scanning surface was obtained by 3D scanner, and the 3D digital model of nose was obtained by Meshmixer. Secondly, the three-dimensional model of the nose design was modeling by SolidWorks and the three-dimensional model of nose protector mold was obtained by the boolean operation, and the data of model was converted to the format of STL identified by slicing software. Then, by setting the parameters of 3D printer of fused deposition molding and adding the external cooling equipment, the model of the nose protector mold was printed, with the polyvinyl alcohol （PVA） as the printing supplies. Finally, the integrally formed nose protector model was finished by the method of casting with silica gel and dissolving mold with hot-water. The results show that this method can be effectively applied to the production of the nose protector model ,so as to realize the transformation from 3D scanning shell surface to mold entity model ,which provides a method for manufacturing the similar products.
Tool Engineering（The Magazine for Cutting ＆ Measuring Engineering）
3 D printer
nose protector mold
3 D scanning