การลดสัดส่วนผลิตภัณฑ์ไม้เคลือบผิวเมลามีนที่มีข้อบกพร่อง

Abstract

The purpose of this research is reduce the defect of melamine face chipboard manufacturing process, targeting as no more than 1.5%, by applying principles of DMAIC for improvement. The researcher studied the production process was found the problem top three of defects identified as paper missing, paper broken and double press. About 4M principle to used analyze to find the cause related defected there are the factors of raw material, methods, machines, and employees. The result of design of experiment at 0.05 level of significance to analyze factor cause of raw material and method which effect to process of production found the film weight of melamine paper, Belt speed and paper belt speed the factors that affect the defection.And then analyze the optimal value parameter the appropriate for applying in production processes. When using with 65 gram white melamine paper, the optimum production belt speed is 60 % and the paper laying belt speed is 40 %. For production with 70 gram (S) white melamine paper, the optimal production belt speed is 70 % and the laying belt speed is 40 % and for production with 70 gram (D) white melamine paper, the optimum production belt speed is 75 % and the paper laying belt speed is 40 %. About improvements for machinery included adding production line machine to the preventive maintenance plan every 2 months and control machine by inspection for machine before and during production by operators. After improving and controlling main cause the defect was reduced from 2.02% to 1.50%, which achieved the target.