Abstract:
The objective of this research was to reduce the deformation of shading sheets in the mobile
phone display component assembly process with the application of statistical process control and by
designing experiment techniques.
The research methodology began with identifying the possible root causes of deformation
by employing a cause-and-effect diagram and experts brainstorming. The top five important factors
were selected and analyzed by the Plackett-Burman experimental design. The five factors studied in
this research included the feeding speed of the pickers, the angle of the edge of the feeding table, the
angle of the plate from the feeding table, the distance of the shading sheet from the edge of the feeding
table, and the gap between the pickers and the feeding table.
The results obtained from the analysis employing the Plackett-Burman design illustrated
that only two factors, the feeding speed of the pickers and the height between the pickers and the
feeding table, had a statistically significant impact on deformation at a significant level of 0.05. Then
3[superscript k] factorial design with the response optimizer was consequently applied to analyze the feeding speed of the pickers at 100.0, 120.0, 140.0 mm/s and the gap between the pickers and the feeding table at 0.025, 0.035, 0.045 mm. The optimal level of the feeding speed of the pickers and the optimal gap
between the pickers and the feeding table were 140.0 mm/s and 0.045 mm. respectively. After the
implementation, the deformation of shading sheets decreased from 8.65% to 3.29%, leading to the
companys reduction of loss value by 5.25%.