Propuesta de diseño de moldes de inyección de plástico en madera para fabricación de protector diadema covid-19

Abstract

The present document demonstrates that it is possible to manufacture a plastic injection mold using wood, since it is a more cost-effective and faster process, compared to 3D printing with FDM technology for mass production of face shield type visors. The results allow to conclude that a mold made of pine wood resists the pressure of 12.22 MPa generated during the high-density polyethylene injection process, which is ratified by a minimum safety factor of 3.1 obtained from a static analysis of an orthotropic material. The production of 180 visors per plastic injection implies an investment of $ 2,314.80 with a sale price of $ 5.88 per visor. It is a 3.59 times less investment to implement and 2 cents less in the sale price compared to the production by 3d printing. With 18 hours in the plastic injection process, 2,160 visors are produced, it is equivalent to the production of a year of a station of 9 3d printers working 9 hours a day for 5 days a week. A visor model is designed with CAD tools, the model is validated with CAE simulations and users of different ages and genders, a plastic injection mold is designed with CAD tools, it is validated through a DOE and CAE, CAM simulations, for finally making a cost analysis and obtain the sale price per viewer and the cost of implementation of the process.