A Study on Using Fractional Factorial Experimental Design for Improvement of Automotive Panels Printing Processes

• Main Authors: Chen-YuChuang, 莊辰昱
• Other Authors: Yu-Hsiang Huang
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/kjgsgv

碩士 === 國立成功大學 === 工業與資訊管理學系碩士在職專班 === 105 === The panel industry has been indispensable in the rapid development of information technology for nearly 20 years. In considering the increasing competition, firms have to deal with production capacity, supply and demand imbalance, and price competition. The emergence of consumer electronic products enhances the panel applications, especially in the automotive panel market, such as central navigation systems and digital dashboards. However, the panel industry encounter challenges of changes in production processes to enhance product quality and correspond to diverse consumer segments, and thus how to improve the process capacity to enhance business competitiveness becomes a critical issue. This study investigates a screen printing process for a high-tech factory, in which the factory mainly produces automotive panel products but encounters the problem of inner edge overflow ink after printing due to changes in the production process. Thus, this study uses the fractional factorial experimental design and response surface methodology to obtain the theoretical model and optimal solutions for the related parameters and improve the problem of inner edge overflow ink. This study considers all related factors that may affect the printing process based on the current condition. In considering costs and machine capacity, we firstly select the factors that result in overflow ink and use the fractional factorial experimental design to investigate the effects that the main factor and other related factors have on the reaction values. Then, we construct first and second order response surface model to examine the obtained significant factor and obtain the empirical model and optimized parameters. The results show that the optimal parameter settings for the ink type (X1) Type γ are the squeegee speed 100 mm / sec, squeegee pressure 20 kg, squeegee under pressure 0.2 mm, and the optimal overflow ink value is 92.64 μm. Moreover, the rubbing frequency can be reduced by 33%, the production capacity can increase 46.7%, and the defect rate can be decreased by 0.3%. Thus, the proposed approach is feasible for future applications in the screen printing process.