Hydraulic press design for recycling HDPE high-density polyethylene in plates form

Abstract

In this project, a hydraulic press was designed to make plates of high-density polyethylene plastic flakes (HDPE) recycled, an analysis of the pressures and temperatures necessary to be able to give it the appropriate shape was carried out, and the plastic agglomerates correctly. Once these data were known, the necessary force that the hydraulic piston should provide was calculated. With this force, an analysis of the hydraulic system was made and the hydraulic diagram was made observing the functions that are required. The closing force of the press is up to 676 KN and the temperature with which the mold enters the press is up to 285 °C. It began by selecting the power unit, continuing with the actuator, which would be a double action piston. to compress and lift the lid of the molds. Finally, at this stage the hoses and control valves were selected. Knowing the force for compression, the materials used in the structure of the press were also determined. Commercial profiles were preferably selected for their easy acquisition, assembly, maintenance and to reduce the costs of the structure. Once the H-type structure of the press was achieved, the dimensions of the plates that will have the function of distributing the compression force in the molds of the different sizes were determined. Finally, the design of the hydraulic press was carried out with the help of an assisted design program called SolidWorks®.