Diseño y construcción de una tamizadora con un sistema de vaiven para arenas de moldeo en el taller de fundición de la empresa MINABRADEC.

Abstract

The design and construction of a molding-powder sieving machine to implement in MINABRADEC company was based on the need to reduce the sieving time and reduce the number of people that is employeed in this procedure, thus replace the hand sieving that was carried out through a sieve and 2 to 3 people. Through concurrent engineering and the methodology of QFD matrix, the needs and requirements of the Company were analyzed in order to make a comparison with the competitors, subsequently the best alternatives were analyzed to build the machine, taking into account quality, environment, costs, appearance and requirements, resulting in a swing machine in order to obtain a shuttle system that resembles a sieving manual machine. The sieving machine comprises an electric motor with a band, whose shaft is connected to a disc with an eccentric shaft that allows the oscillation of the system. The calculations were obtained manually where a dynamic analysis of mechanism was fulfilled and the design methods for axes, and transmission system by band and pulley were applied. At the end, the geometry was created with the help of Solidworks software. Using Adamas software, the analysis of forces and efforts of the system was conducted in order to validate and verify the resulting design, getting a low-cost and very efficient machine that meets the demand required by the company. The ability of sifting average obtained was 120 kg/min, which varies according to the type of mesh to use, and the particle size of sand, furthermore, an engine power of 1HP was gotten. Finally, the machine was tested concluding that the design is suitable for the working environment with a high efficiency, and it will help to reduce operating costs considering that only one operator will be needed to perform the sifting task.