Repotenciación y planificación del mantenimiento preventivo de una máquina inyectora de poliuretano JHBW-A200 para el aislamiento térmico de autobuses de la Empresa ALME de la ciudad de Ambato

Abstract

The objective of this curricular integration work was to repower and plan the maintenance of the JHBW-A200 polyurethane injector of ALME Company in Ambato city. All the elements of the equipment were analyzed and inspected, determining the current technical state through the UNE-EN 60300-3-11:2013 standard based on maintenance focused on reliability, where action plans were developed that included maintenance activities. The elements of the injector were repowered by cleaning, replacing and lubricating parts such as gaskets, pneumatic and hydraulic hoses, joints, couplers, valves, etc. Once the asset was started up, a criticality analysis was carried out, determining that the injection and pumping system of the Polyol and Isocyanate components were the most critical. In addition, the preventive maintenance plan for all the equipment was drawn up with the aim of anticipating and anticipating any type of failure; thus describing the main maintenance activities with a schedule of calendar frequencies, to keep total control of the most critical parts and including safety and risk prevention techniques within the company in order to improve the use and management of the equipment. For the analysis of results, a modal analysis of failures and effects was carried out with the help of criteria of severity, occurrence and detection, where each failure mode was evaluated to determine the priority number of their risk; capturing them in the Pareto diagram, showing that the blockages of the hoses and the embedded suction shafts were the most frequent failure modes. It is always recommended that for each use of the injector, the maintenance intervention must be immediate, since the chemical composition of the components causes the parts to dry out and seriously damage the equipment.