Alexandru BUGA, Alina BREGNOVA


The choice of the manufacturing method of plastic gears presents a great challenge for technologists. Therefore, it’s needs to do an extensive study on the materials and the choice of the manufacturing method taking into account the quality, the environment and the purpose of use of the precessional transmissions (PT) and not least the manufacturing price. This article provides theoretical and experimental contributions on fabrication of PT gears by two methods: molding injection and additive methods. Engineering plastics of interest are researched and highlighted. Manufacturing techniques and machinery. The technological particularities regarding to improvement of the mechanical properties, the quality of the parts and minimize the coefficient of friction between gear wheels. Gear design procedure for PT. At the end of the work are presented a comparative analysis of the proposed manufacturing processes.

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