| Summary: | 碩士 === 大同大學 === 機械工程學系(所) === 93 === Abstract
TFT-LCD is the abbreviation of Thin-Film Transistor Liquid-Crystal Display. The front and back covers of the products are made by means of plastic injection molding. The length and breadth ratio is quite uniform (nearly 4:3), and the related development technologies of plastic molding are matured to a certain extent. Among the LCD TV (namely, the abbreviation of Liquid Crystal Display Television) series of products, market orientation is 16:9 wide screen ratio and large sizes. However, there is no related information on the tooling development technologies of such plastic injection molding front and back cover components of larger length and breadth ratio. This study will discuss and analyze the phenomenon of finished product twist deformation and abnormal molding surfaces that I possibly encountered during the process of tooling development for front and back cover molding injection work-piece (appearance) in LCD TV products.
With almost 10 years of experience in the plastic tooling industry, I made the decision to plunge myself into this study of looking at the continuous contraction of the product development process. Possible problems with LCD-TV products from tooling development to molding test and mass production will be discussed in this study. This will be in an attempt to establish a set of rules for development for references when designing similar tooling in the future. This study is accomplished by means of integration of experience and technologies, applications of CAD/CAM/CAE and actual tooling development. The result may enable the passing on of the information of mechanical technologies and contribute to education and training as well as development of new products in the future.
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