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Lee, Dong-Yoon;Hong, Sang-Hyun;Song, Ki-Hyeong;Kang, Eun-Goo;Lee, Seok-Woo
- Transactions of the Korean Society of Mechanical Engineers A
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- v.35 no.1
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- pp.33-37
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- 2011
In the fields of display, optics, and energy, it is important to improve micropattern-machining technology for achieving small patterns, large surface areas, and low cost. Unlike flat molds, roll molds have the following advantages: they can be manufactured within a short time, larger surface areas can be obtained, and continuous molding can be achieved. In this study, we aim to investigate the causes for errors in the shapes for a micropattern-machining process, and we show that by compensating the dynamic balance of roll molds, the dimensional accuracy of machined parts can be improved. The experimental results show that dynamic-balance compensation for a roll mold reduced the mass unbalance and the vibrations of the roll mold, and as a result, the dimensional accuracy of machined micropatterns has been improved.
https://doi.org/10.3795/KSME-A.2011.35.1.033 인용 PDF KSCI

Lee, Seok-U;Lee, Dong-Yun
- The Optical Journal
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- s.135
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- pp.26-30
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- 2011
디스플레이 산업은 우리나라의 대표적인 주력산업으로서 일본, 대만 등의 경쟁국들을 압도하고 있으며, 특히 LCD 분야는 우리나라가 최근의 대형화 및 고급화 경향을 선도하고 있다. LCD의 핵심 모듈인 BLU(Back Light Unit)에 사용되는 프리즘시트를 생산하기 위해 대면적 롤금형이 가장 많이 사용되고 있으며, 향후 도광판, 확산판 등으로 그 응용처가 확산될 것으로 기대되고 있다.
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Park, Chun-Hong;Oh, Jeong-Seok;Shim, Jong-Youp;Hwang, Joo-Ho
- Journal of the Korean Society for Precision Engineering
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- v.28 no.7
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- pp.761-768
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- 2011
The large surface micro machining system includes the equipments and processes for manufacturing the ultra precision micro patterned products with large surface through the mechanical machining. Recent major issue on the micro machining technology may be the development of optical parts for the back light unit of display which has the largest market. This special issue makes up with three parts; the large surface micro machining system and machine, machining process and forming process. In this paper, the state-of-the-art and core technology of large surface micro machining system is introduced with focus on the manufacturing technology for the back light unit of LCD TV. Then, some research results on the development of a roll die lathe is introduced which involves the concept of machine design, improvement of thermal characteristics in the spindle system, improvement of relative parallelism and straightness between spindle system and long stroke feed table, machining of micro pitch patterns. Finally, the direct forming process is introduced as the future work in the large surface micro machining field.
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Song, Ki-Hyeong;Lee, Dong-Yoon;Park, Kyung-Hee;Lee, Seok-Woo;Kim, Hyun-Cheol;Je, Tae-Jin
- Journal of the Korean Society of Manufacturing Process Engineers
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- v.11 no.2
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- pp.7-12
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- 2012
In order to cope with the requirements of smaller patterns, larger surfaces and lower costs in the fields of displays, optics and energy, greater attentions are now being paid to the development of micro-pattern machining technology. Compared with flat moulds, large drums with micro patterns (roll moulds) have the advantages of short delivery, ease of manufacturing larger surfaces, and continuous moulding. This paper introduced the machining process technology of the roll moulds for display industry. The environmental effects were discussed and the importance of temperature maintenance was experimentally emphasized. The real time monitoring system for micro machining was introduced. A commercial solution was used to simulate the micro grooving and a deformation model of micro machined pattern was finally introduced.
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