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Effects of Preheating and Cooling Durations on Roll-to-Roll Hot Embossing

Published online by Cambridge University Press:  14 October 2014

Seyoung Kim ,
Youngsu Son ,
Heechang Park ,
Byungin Kim  and
Dongwon Yun
Seyoung Kim*
Affiliation:
Department of Robotics and Mechatronics, Korea Institute of Machinery & Materials (KIMM), 156 Gajeongbuk-Ro, Yuseong-Gu, Daejeon 305-343, South Korea
Youngsu Son
Affiliation:
Department of Robotics and Mechatronics, Korea Institute of Machinery & Materials (KIMM), 156 Gajeongbuk-Ro, Yuseong-Gu, Daejeon 305-343, South Korea
Heechang Park
Affiliation:
Department of Robotics and Mechatronics, Korea Institute of Machinery & Materials (KIMM), 156 Gajeongbuk-Ro, Yuseong-Gu, Daejeon 305-343, South Korea
Byungin Kim
Affiliation:
Department of Robotics and Mechatronics, Korea Institute of Machinery & Materials (KIMM), 156 Gajeongbuk-Ro, Yuseong-Gu, Daejeon 305-343, South Korea
Dongwon Yun
Affiliation:
Department of Robotics and Mechatronics, Korea Institute of Machinery & Materials (KIMM), 156 Gajeongbuk-Ro, Yuseong-Gu, Daejeon 305-343, South Korea
*
*Corresponding author. seyoungkim@kimm.re.kr
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Abstract

In this study, we examined the sensitivity of embossed pattern depth to preheat supply and cooling and investigated how the pattern type and density affect the embossed depth. The main factors that affect embossed pattern qualities of roll-to-roll hot embossing, such as roller temperature, roller speed, and applied force, were determined using the response surface methodology. Eight conditions were then added to determine the time-dependent effects of heat transfer with custom-designed preheating and cooling systems. An extended preheat time for the polymethylmethacrylate substrate contributed to the significant change in the embossed depth, whereas the substrate-cooling did not exhibit a clear increasing or decreasing trend. Larger embossed depths were achieved in the horizontal patterns with lower density than in the vertical patterns, and the lower pattern densities showed greater embossed depths in most embossing conditions. We expect that this result will help to understand the effects of the pre- and posttreatment of roll-to-roll hot embossing by employing time duration factors of heat transfer, depending on the mold pattern type and density.

Keywords

roll-to-roll hot embossingpreheatingcoolingpattern typepattern densitypattern depth ratio
Type
Materials Applications
Information
Microscopy and Microanalysis , Volume 21 , Issue 1 , February 2015 , pp. 164 - 171
Copyright
© Microscopy Society of America 2014 

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