Browsing by Author "Navarrete Lopez, Luis Miguel"

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    Diseño y construcción de una máquina para crear filamento para impresora 3D a partir de material reciclado.
    (Ecuador: Latacunga: Universidad Técnica de Cotopaxi (UTC), 2024-08) Laguatasig Toapanta, Willian Fabian; Navarrete Lopez, Luis Miguel
    This project focused on building a prototype to create 3D filament. PLA (Polylactic Acid) with a density of 1.24 g/𝑐𝑚􀬷 was used as raw material, which requires a temperature of 200 °C for its melting. The design of the extruder machine began with the construction of a square hopper made of ASTM A36 steel with a capacity of 8.27 kg. For the auger, a 1 ¼ in tungsten carbide drill bit was used, with a diameter of 32 mm and a length of 400 mm. For the extruder cylinder, AISI 1020 steel was also used, with an inner diameter of 50 mm and a length of 675 mm. The cooling system used a DC fan. Finally, a support structure was built in 6 mm ASTM A36 steel. A control board was implemented using the Arduino Mega 2560 microcontroller using serial communication via TX/RX protocol (HMI) to start a DC geared motor, with a PWM controller an Arduino mega was used to control the three thermocouples and three 250 W clamp resistors, which allowed them to be turned on or off according to a reference value of 190 °C. Finally, the extruder was tested for operation.
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    Repotenciación de una encoladora de libros al calor por medio de control de temperatura.
    (Ecuador: Latacunga: Universidad Técnica de Cotopaxi (UTC), 2024-08) Robalino Gruezo, Santiago Salvador; Zambrano Bravo, Cesar Rivaldo; Navarrete Lopez, Luis Miguel
    This technological proposal addresses the refurbishment of a heat-based books binding machine, with the aim to optimize binding process time through the implementation of a thermal control system. The project faced the challenge of comprehensive equipment reconditioning, including the correction of operational deficiencies, automation process, and temperature control. During the project development, an evaluation of the machines initial state was conducted, followed by the design and implementation of a PLC-based control system.This included the integration of cutting-edge components such as RTD Pt100 temperature sensors and an HMI interface, implementing an ON/OFF control algorithm for precise adhesive temperature regulation. Additionally, electrical components were carefully selected and sized. The refurbished binding machine was equipped with thermal control, maintaining the adhesive within its optimal operating range, which resulted in greater consistency in binding quality. Furthermore, the implementation of the HMI interface enhanced the interaction between the operator and the machine, facilitating real-time adjustments and effective process monitoring, thus allowing adaptation to various types of paper and adhesives. This technological innovation optimizes the process, also establishes it a solid foundation for future improvements and adaptations in response to the changing dynamics of the bookbinding industry.