Diseño experimental factorial para determinar las condiciones óptimas de operación en el proceso productivo de las inyectoras (WT02, WT05) en la planta de plástico Industrial S.A.

Abstract

The purpose of the present titration work is to determine the optimum conditions of operation in WT-05, WT-02 injections using statistical techniques in such a way as to reduce the number of defects, increase the production index and stabilize the process in the elaboration of the children's boot in the company "Plasticaucho Industrial - Plastico Plant". The investigation started with a diagnosis of the injection process, through the analysis of production capacity in the machines, calculated the capacity index of the process (CPK) to evaluate the variability and determine if the process meets the specifications and is controlled. The factors that control the operation of the machine and their respective levels were taken based on control sheets, determining the sample size by applying the calculation based on an initial mobility, the principles of repetitiveness and randomness were executed so that the results are more reliable, verifying them through the assumptions of normality, independence, homogeneity of variance and the ANOVA test through the MINITAB program, with the use of the program and data entry, we proceeded to interpret the interaction graphs, main effects and the regression equation linear, for the determination of the ideal levels to reduce the problem, establishing the optimal conditions of operation. Finally, the optimal production process was implemented and evaluated using the capacity index of the process, determining how much it improved, obtaining the following results, the percentage of defects decreases, in CPK for the WT-05, an increase to 0.72 and for the WT - 02 to 0.86 and rework costs decreased. By means of factorial experimental designs, the optimal operating conditions of the WT-02 and WT-05 machines were obtained, reducing the high variability of the process and the percentage of defects of the final product and it is recommended to carry out a study using the Poka-Yoke technique to reduce the defects caused by injection personnel