• Title/Summary/Keyword: nano-molding

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A Study on the Fabrication of Nano-Pattern Mold Using Anodic Aluminum Oxide Membrane (양극산화 알루미늄막을 이용한 나노패턴 성형용 금형제작에 대한 연구)

  • Oh, J.G.;Kim, J.S.;Kang, J.J.;Kim, J.D.;Yoon, K.H.;Hwang, C.J.
    • Transactions of Materials Processing
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    • v.19 no.2
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    • pp.73-78
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    • 2010

  • Recently, many researches on the development of super-hydrophobic surface have been concentrated on the fabrication of nano-patterned products. Nano-patterned mold is a key to replicate nano-patterned products by mass production process such as injection molding and UV molding. The present paper proposes the new fabricating method of nano-patterned mold at low cost. The nano-patterned mold was fabricated by electroforming the anodic aluminum oxide membrane filled with UV curable resin in nano-hole by capillary phenomenon. As a result, the final mold with nano-patterns which have the holes with the diameter of 100~200 nm was fabricated. Furthermore, the UV-molded products with clear nano- patterns which have the pillars with the diameter of 100~200nm were achieved.

  • https://doi.org/10.5228/KSPP.2010.19.2.073 인용 PDF KSCI

A Study on Plastic Injection Molding of NanosStructured Surface with a Local Mold Heating System (국부 가열 금형을 이용한 플라스틱 나노 구조표면 사출성형 연구)

  • La, Moon Woo;Park, Jang Min;Kim, Dong Earn
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.14 no.4
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    • pp.8-13
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    • 2015

  • In this study, we fabricated and characterized a nanostructured surface based on a plastic injection molding with a local mold heating (LMH) system. A metal mold core with a closed packed nano convex array (CVA) was achieved by integrated engineering procedures: (1) master template fabrication by anodic aluminum oxidation (AAO), (2) nickel electroforming (NE) process, and (3) post-processing by precision machining. The nickel mold core was utilized to replicate a surface with a closed packed nano concave-array (CCA) based on injection molding using cyclic olefin copolymer (COC) as a plastic material. In particular, an LMH system was introduced to enhance transcription quality of the nano structures by delaying solidification of molten polymer near the surface of the mold core.

  • https://doi.org/10.14775/ksmpe.2015.14.4.008 인용 PDF KSCI

Fabrication of Nano-Pattern Mold Using Anodic Aluminum Oxide Template (양극산화 알루미늄을 이용한 나노패턴 성형용 금형제작)

  • Oh, J.G.;Kim, J.S.;Kang, J.J.;Kim, J.D.;Yoon, K.H.;Hwang, C.J.
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • 2009.05a
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    • pp.240-243
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    • 2009

  • Recently, many researches on the development of super-hydrophobic and anti-reflective surfaces have been concentrated on the fabrication of nano-patterned products. The nano-patterned mold is a key to replicate nano-patterned products by mass production techniques such as injection molding and UV molding. The present paper proposes fabricating nano-patterned mold with cost-effective method. The nano-pattern molded was fabricated by electroforming the anodic aluminum oxide template without E-beam lithography. The final mold with nano-patterns showed the pores with the diameter of $100{\sim}120$ nm and the height of 150 nm was fabricated.

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Investigation on micro/nano filling behavior in LGP injection molding (LGP 사출성형 시의 미세충전 특성해석)

  • Cho, K.C.;Shin, H.G.;Kim, H.Y.;Kim, B.H.
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • 2006.05a
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    • pp.91-94
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    • 2006

  • In this paper, in order to get micro or nano size optical patterns, an analytical and experimental investigation on a LGP (light guide plate) injection molding process has performed. The LGP, which diffusing and emitting the light from the CCFL or the LEDs to the panel front direction uniformly, typically has an under 1mm thick base substrate and numerous 60 to $170{\mu}m$ width and 6 to $10{\mu}m$ thick dot patterns on it. Generally, the small size LGPs, for mobile devices, have been and are being made of PMMA through the injection molding process. However, the substrate thickness and the dot pattern size are decreasing, it becomes hard to fill the micro to sub-micro cavities completely. To investigate the flow behavior of resin in micro/nano cavities and identify the characteristics of the LGP injection molding process, we carried out the flow analyses with respect to the variations of the substrate thickness, the dot pattern size and the pitch of a cavity.

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