To Study the Effects of Part Shapes on the Elongation of Film by Out-Mold Decoration Processing

• Main Authors: Hsu, Sheng-Hsun, 許勝勛
• Other Authors: Hsu, Pe-Ming
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/48235033547396251598

碩士 === 遠東科技大學 === 機械工程研究所 === 105 === Out -Mold Decoration (OMD) is one of the fastest growing molding technology in recent years; it achieves molding effect without performing two-process work on the surface. Using OMD, due to film’s preheating temperature, vacuum pressure, and product shape causes pattern extension on film and affect product’s external appearance quality; hence, this research performs preliminary research based on observing perspectives such as extension rate and thickness change after OMD shaping. This research discovers different film thickness, preheating temperature, models, observes film’s extension rate and thickness change rate. The experiment result shows that, under influences of different models to formability, the larger circular bead, the lower film’s extension rate, the smaller circular bead, the higher extension rate, and the extension rate between the two have the largest difference 47.6%. The larger bevel angle, the lower film’s extension rate, the smaller bevel angle, the higher extension rate, and the extension rate between the two have the largest difference 62.2%. Regarding the influence of different film’s preheating temperature to formability, the higher film’s preheating temperature, the higher extension rate, the lower film’s preheating temperature, the lower extension rate, and the circular bead’s extension rate’s difference ranges from 7.6%~8.8%. The bevel angle’s extension rate’s difference ranges from 2.2%~7.4%. The circular bead’s thickness change rate’s difference ranges from 0%~1.33%. The bevel angle’s thickness change rate’s difference ranges from 0%~1.33%. Regarding the influence of different film’s thickness to formability, the thinner film’s thickness, the higher extension rate, the thicker film’s thickness, the lower extension rate, and the circular bead’s extension rate’s difference range is 28.4%. The bevel angle’s extension rate’s difference range is 22.4%. The circular bead’s thickness change rate’s biggest difference is 14.67; the bevel angle’s thickness change rate’s biggest difference is 12%. Regarding the influence of different models’ height to formability, the higher model height, the higher extension rate, the lower model height, the lower extension rate, and the extension rate between the two have the difference range 44.26%. Comparing T-SIM analysis result and experiment result, the overall tendency is approximately same. Keywords: Out -Mold Decoration, Temperature, Extension rate, Film