การปรับลดระยะเวลาการหยุดทำงานชุดรางพับเครื่องพิมพ์ : กรณีศึกษา โรงงานผลิตกล่องลูกฟูก

Abstract

This research was about the problem of the Flexo printing machine downtime that affects the machine to stop for initial adjustment and correction by the operator, this results in the loss of cost and production time. Therefore, the objective of this research was to reduce Flexo printing machine downtime at the folding bar by 30% compared to the production downtime data before the improvement. This study started by collecting data on the condition of printing machine problems affecting machine downtime in February 2021. The Pareto chart found that the most problems were the Folding & Gluing Section Unit at the folding bar and collecting downtime data for the folding bar from January 2020 to April 2021, the machine downtime average was 195.8. minutes per month and the Standard deviation was 97.49 minutes per month. Consequently, the problems were analyzed by using a fishbone diagram and Failure Mode and Effect Analysis to find out the root causes of the problems. The risk priority number score was over 200 points. After that delivered into the improvement process by using the principle of Total Productive Maintenance. It consists of adjustment /replacement/installation of spare parts and equipment. Preparing Work Instruction document for set-up and checking. Preparing check sheet form. Preparing annual maintenance plan and training to educate operators and maintenance technicians for the Folding and Gluing Section Unit. Then followed up on improvements by collecting downtime at the folding bar to compare with before the improvement. The results indicate that the downtime average at the folding bar was reduced from 195.8 minutes per month to 64.75 minutes per month, which is representing a 66.93% reduction according to the objective and the standard deviation was reduced to 6.80 min per month.