The paint manufacturing process requires compliance with the processes of filler preparation, dispersion, grinding, homogenization, packaging, and storage. According to NTE INEN 2094 “Paints - Synthetic alkyd enamels for domestic use” the viscosity of the paint should be between (75–80 KU) during the dispersion process, but in the company of our study 67% of the products did not meet this specification. Therefore, the main objective of this project is to improve the efficiency of the dispersion process through automation and agitation time control. A human-machine interface (HMI) was developed and an S7–1200 PLC and a KTP900 HMI screen were programmed using TIA Portal software. This system allowed precise control of agitation times during paint dispersion. The method focused on ensuring that the viscosity remained within the required limits, avoiding rework and production delays. The implementation of automation in the dispersion process led to a significant reduction of 29.03% of nonconforming product, resulting in a substantial decrease in process time, from 6.502 min to 3.719 min in total for the 18 dispersions evaluated. This improvement is mainly attributed to the decrease in the time required for reprocessing. This contributed to improving the efficiency and quality of the final product, meeting the required standards.
