Diseño y construcción de una máquina trituradora de capacidad 2,5 kg de polietileno de baja densidad reciclado

Abstract

The development of this technical project was started from an ecological point of view, in order to give a new use for the covers (Low Density Polyethylene) that are currently a large percentage of waste in our landfills sanitaria’s. El development of this project technical departed from an ecological point of view, in order to give a new use for the covers (low density Polyethylene) that are currently a large percentage of waste in our landfills. For what the low density polyethylene has a new use , must possess certain physical characteristics that allow their reintegration into the manufacturing industry , the characteristic most important is that the material returns to its state of pellets , so a machine grinding plays a role important in recycling this product. In project present analysis of all the parameters involved in the crushing of low density polyethylene (cases), and these occurred; the angle of the cutting edge of the blades, spindle speed, grinding time, founded a type of recycled among the most important. Identified the characteristics involved in the shredding process several design alternatives consider, being the selected crusher blade vertical axis, the facility ease of construction, facility maintenance and covering same size. The design process all stresses to which the crusher is subjected considered, selected materials and dimensions that meet safety factors, performing itself a finite element analysis to check calculations performed analytically. Then machine according to the specifications detailed above is constructed, performing physical tests that yielded pellets sizes of 3 mm up with crushed times 20 minutes, applied to thick covers from greater than 0.35 mm thickness. Pellets being elaborated for thermoforming practices for the development of various items.