Abstract:
This research has been divided into 8 main steps in 5 phases subsequently as per six sigma approach as follows research for data and cause of problems, define the plan to resolve the problem (Define phase), Measurement to determine the cause of problem (Measure Phase), Analysis for cause of problems (Analysis Phase), Improvement the process (Improvement Phase), Control various factors in process (Control Phase). This methodology is to improve the production process in order to reduce defect products due to hazy problem on surface of special patterns laminated sheet. From this research, it is found out that there are 4 main factors which have effect to the mentioned defect type of melamine resin, reaction rate on overlay surface, amount of resin on the overlay surface and temperature of compression process. From the experiment by control the 4 factors, we found out that the suitable condition are a)melamine resin should be formula 1 b) Reaction rate of resin in overlay surface should be 6 minutes c) Amount of resin in overlay surface should be 58% d) The temperature should be 140 degree C. These conditions should be recorded in to work manual to be a guideline and to be recorded in to daily work record to be able to recheck back in the future. After these improvements, it has reduced significant quantity of defect custom laminated sheet in every color shade. During June2002 to June2003 the average percentage of defect laminated sheet is 14.78 but after that during January 2004 to February 2004 the average defect laminated sheet is reduced to 3.31% or 77.6% reduce from before the improvement.