Diseño y construcción de un molde de inyección para plástico con capacidad de 6 gr

Abstract

This project aims to design and construct an injection mold for a crowfoot and open- end wrench piece, using high-density polyethylene (HDPE) as the base material. For this purpose, a technical evaluation was conducted, encompassing everything from polymer selection and piece design to the injection process simulation and subsequent mold manufacturing. All of this was developed considering the capabilities of the available injection equipment and the academic environment. Throughout the work, specialized tools like SolidWorks Plastics were integrated to predict the plastic flow behavior. These simulations were vital, allowing for the determination of an optimal cycle time of 45 seconds and contributing to the validation of cavity filling. In parallel, detailed engineering calculations were performed, related to the mold's clamping force, flow path, ejection system, and the precise design of the feeding channel, ensuring a robust mold. Finally, a detailed economic analysis was carried out to evaluate the financial viability of the manufactured mold. This analysis, which included the valuation of materials, manufacturing time, and machinery use, demonstrated that the total cost of 818.90 USD was significantly lower than other commercial options. Therefore, this provides a comprehensive overview of the project from a technical and economic perspective, highlighting its cost- effectiveness for low-volume productions or educational purposes.