Examination of Defects, Preventive Measures, and Remedies for Exhaust Manifolds in Foundries to Improve Overall Productivity

Abstract

Casting is one of the most widely used manufacturing processes for producing complex metal components. However, defects in cast components can significantly affect productivity, quality, and overall manufacturing costs. This study focuses on identifying common casting defects, analyzing their root causes, and implementing effective preventive measures and corrective actions to enhance the efficiency of foundry operations. Defects such as sand drop, blowhole, sand fusion, shift, and cold shut are examined using systematic quality tools, including Pareto analysis and Ishikawa diagrams. By optimizing process parameters such as pattern design, pouring temperature, and material composition, defect rates are reduced from 10.1% to 4.4%, leading to improved casting quality. Preventive measures, including proper mold preparation, controlled cooling rates, and effective raw material selection, are explored to minimize rejections and rework. Additionally, the study emphasizes the importance of real-time process monitoring and regular maintenance of equipment to sustain high-quality production. The findings demonstrate that structured defect analysis and proactive quality control measures significantly reduce scrap rates, lower production costs, and enhance foundry efficiency. This research provides valuable insights for foundries aiming to achieve higher productivity, reduce waste, and improve the reliability and performance of cast components.