Procedimiento para la fabricación de moldes de inyección de plástico, para bajas producciones, utilizando tecnologías de impresión 3D

Abstract

Plastic injection molding is a manufacturing process that involves filling the cavity of a mold with a polymer in a liquid state. This process consists of three stages: melting, injection and solidification. The molten polymer is injected at high pressure through a feed system and once the cavity is filled, the pressure is kept constant until the material solidifies. To ensure the quality and efficiency of the process, the design of an industrial mold for plastic injection involves multiple factors. The selection of the mold material must be suitable for the type of polymer to be used, ensuring resistance to corrosion and to the loads generated by the clamping and injection pressures. Regarding the tooling design, it is necessary to include an efficient cooling system to control the temperature and minimize shrinkage deformation of the material. In addition, the channels of the injection system must be properly dimensioned and an ejection system must be designed to avoid deformation of the part at the time of extraction.