Descriptive analysis of the variability in the manufacturing process of Hem-20 granulated rubber in a mexican company Análisis descriptivo de la variabilidad en el proceso de fabricación de hule granulado Hem-20 en una empresa mexicana

Abstract

The present article responds to the question of how to determine variability in the production process of HEM-20 granulated rubber to meet quality specifications, through physical tests of Mooney Viscosity and statistical process control tools. A theoretical perspective based on statistical process control in quality is assumed. The methodology works under a non-experimental, correlational-causal transectional quantitative approach, with a correlational scope that nests the independent variable "quality of the raw material available for processing" with the dependent variable "Mooney Viscosity." The process consisted of the analysis of 52 samples of HEM-20 granulated rubber extracted in the production process, which were evaluated with a Mooney viscometer. The data was processed using I-MR statistical control charts and process capability analysis in Minitab 18. The findings and results showed that the process is unstable in Mooney Viscosity, presenting special variability due to contamination in the raw material and lack of control in the drying temperature. Likewise, the capability analysis showed that it does not meet the required specifications. In this sense, it is concluded that there is a need to implement improvements focused on stabilizing the process to make it capable of producing within the parameters requested by the customer. Finally, it is indicated that future research could apply other statistical and quality management tools to optimize this production process.