• 제목/요약/키워드: Printing parameter

검색결과 51건 처리시간 0.023초

유체 디스펜싱 시스템의 프린팅 프로세스 최적화를 위한 주요 파라미터 분석 (Analysis of Key Parameters for the Printing Process Optimization of a Fluid Dispensing Systems )

  • 강호승;정해창;홍순호;윤남경;손선영
    • 한국전기전자재료학회논문지
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    • 제37권4호
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    • pp.382-393
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    • 2024
  • 유체 디스펜싱(fluid dispensing) 방식인 Microplotter 시스템은 압전 소자를 통한 초음파 펌핑(pumpin)을 기반으로 유체를 분사한다. 이 기법은 넓은 범위의 점도를 가진 다양한 물질들이 마이크로 사이즈로 프린팅 되는 것을 가능하게 한다. 본 논문에서는 디스펜서 프린팅 기술에 대해 소개하고 장비를 이용한 다양한 공정을 이해 및 응용에 목적을 두고 있다. 또한, 분사 강도, 분사 시 팁의 높이, 분사 속도와 같은 매개변수들을 조절하여 장비의 최적화 방법에 대해 설명하고자 한다. 금속 나노 입자, 탄소나노튜브, DNA, 단백질 등 광범위한 유체와 호환된다는 Microplotter의 장점을 이용함으로써 인쇄전자, 생명공학, 화학공학 등 다양한 분야에서 활용될 것으로 기대된다.

전기수력학적 프린팅 기술을 이용한 Ag 미세회로의 굽힘 특성 (Bending Characteristics of Ag Micro Circuits using Electrohydrodynamics Printing Technology)

  • 이용찬;안주훈;이창열
    • 항공우주시스템공학회지
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    • 제13권4호
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    • pp.37-42
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    • 2019
  • 본 논문에서는 장치의 유연성과 소형화를 위해 EHD 잉크젯 프린팅 기술을 이용하여 은 나노 잉크의 굽힘 특성을 확인하였다. EHD 기술을 위한 최적조건을 도출하였고 은 나노 회로의 굽힘 특성을 파악하였다. EHD 프린팅을 위해서는 재료 특성, 밀도, 유량, 전압, 토출 높이 등 각 파라미터 별 최적점을 찾아내는 것이 필수적이므로 작동 높이와 인가 전압에 따른 각각의 최적점을 도출하였다. 또한, 제작한 굽힘 장치를 통해 각 곡률 반경 별 저항을 측정하여 굽힘 특성을 알아보았고, 곡률이 증가함에 따라, 저항변화율이 급격히 증가하는 것을 확인하였다.

금속 3D 프린터 제작조건 변화에 의한 금속소재 물성변화연구 (Study of Mechanical Property of Metal by Changing the Conditions of Metal 3D Printing Parameter)

  • 노용오;이병호;박순홍;한영민;배병현;김영준;조황래;현성윤;방정석
    • 한국추진공학회:학술대회논문집
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    • 한국추진공학회 2017년도 제48회 춘계학술대회논문집
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    • pp.849-855
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    • 2017
  • 우주 발사체의 운반능력을 향상시키기 위하여 고성능 다단연소사이클 엔진의 개발은 필수적이다. 그 중 연소기 헤드는 기체산화제의 유입을 위해 콘 형상으로 되어 있으며, 매니폴드는 매우 복잡한 구조를 가지고 있다. 이러한 헤드는 주조 방식이나 기계가공으로 제작되어 왔다. 기계가공의 한계나 주조재질의 특성과 재료의 한계성을 탈피하여 복잡하고 가공이 어려운 연소기 헤드의 제작 공정을 3D 금속 프린팅 공정을 이용하여 개선하는 기술을 확보하고자 한다. 현재 3D 금속 프린팅을 이용하여 주연소기에 사용할 수 있는 소재의 물성을 파악하고 프린팅 제작조건의 변화를 주는 공정개발을 통하여 더욱 낳은 물성을 확보하고, 이를 바탕으로 연소기 헤드를 제작하고, 접합공정을 개발하여 연소시험을 통해 그 성능을 입증하고 제작공정을 확립하고자 한다.

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1 차원 Lumped 모델을 이용한 산업용 잉크젯 프린팅 헤드 토출 특성 해석 (Performance Analysis of the Industrial Inkjet Printing Head Using 1D Lumped Model)

  • 심원철;김영재;박창성;유영석;정재우;오용수;박성준
    • 한국정밀공학회지
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    • 제24권11호
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    • pp.101-107
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    • 2007
  • Jettability analysis using one-dimensional(1D) lumped parameter model has been investigated to design the industrial inkjet head with proper drop velocity and drop volume. By simplifying the inkjet head system into an equivalent electrical circuit, lumped model has been developed. Performance of the lumped model is verified by the comparison between measured results of droplet velocity and ejection volume and predicted value. Also, the jetting performance of an inkjet head is characterized by varying the design parameter and driving condition. As a result, simulation results shows good agreement with the experimentally measured value. The developed lumped model enables to easily understand the effect of dimension change and predict the jetting performance.

Interactive Effect of Food Compositions on the Migration Behavior of Printing Ink Solvent

  • An, Duek-Jun
    • Preventive Nutrition and Food Science
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    • 제14권4호
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    • pp.310-315
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    • 2009
  • The partitioning behavior of the five printing ink solvents in nine lab-made cookies with various sugar and water content at 25${^{\circ}C}$ was studied to find out the presence and effects of interaction between the two ingredients on partitioning behavior in cookies. Solvents were ethyl acetate, hexane, isopropanol, methyl ethyl ketone and hexane. It was observed that the partition coefficient (the solvent concentration in food compared to that in air, Kp) decreased as sugar increased in all case and increased as water content increased for all compounds except toluene. Statistical analysis by the F-test method was used to determine the significance of sugar-water interactions, as well as other single factors on partitioning behavior of each solvent. Sugar content alone had no significant effects, but the crystallinity of sugar, as changed by water content, affected the partitioning behavior of the five solvents significantly. Parameter estimation for each significant factor by SAS program yielded a regression equation, which was used to predict the partitioning behavior in the finished cookie. Kp values from the regression equation could be determined more precisely by applying a correction term for the interaction between sugar and water to the Kp values of each ingredient after baking.

적층제조된 알루미늄 합금의 공정변수 및 합금조성이 상대밀도와 기계적 특성에 미치는 영향도 분석 (Analysis of the Effects of Process Variables and Alloy Composition on the Relative density and Mechanical Properties of 3D Printed Aluminum Alloys)

  • 박수원;여지윤;한송윤;최현주
    • 한국분말재료학회지
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    • 제30권3호
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    • pp.223-232
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    • 2023
  • Metal additive manufacturing (AM) has transformed conventional manufacturing processes by offering unprecedented opportunities for design innovation, reduced lead times, and cost-effective production. Aluminum alloy, a material used in metal 3D printing, is a representative lightweight structural material known for its high specific strength and corrosion resistance. Consequently, there is an increasing demand for 3D printed aluminum alloy components across industries, including aerospace, transportation, and consumer goods. To meet this demand, research on alloys and process conditions that satisfy the specific requirement of each industry is necessary. However, 3D printing processes exhibit different behaviors of alloy elements owing to rapid thermal dynamics, making it challenging to predict the microstructure and properties. In this study, we gathered published data on the relationship between alloy composition, processing conditions, and properties. Furthermore, we conducted a sensitivity analysis on the effects of the process variables on the density and hardness of aluminum alloys used in additive manufacturing.

방적기계용 스핀들 인서트의 최적설계 관한 연구 (The Study for Optimal Design of Spindle Insert used in Cotton Spinning Machine)

  • 이동우;허선철;이상석;심재준
    • 한국정밀공학회지
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    • 제27권4호
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    • pp.72-78
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    • 2010
  • Textile machinery affects various industry, such as sport leisure industry, metal and chemistry material, electric electron, mechanical energy, packing and printing industry. In case of design of textile machine, the very important fact is absorbing the minute vibration induced by spinning thread and insert which is the part of spindle plays a role of reduction of impact caused by oscillation of thread bobbin. Therefore, Optimal design was executed by design of experiments and kriging optimal design methods to prevent fracture of spindle insert under the fatigue condition and deduced the best value of design parameter to improve the stability of the products. The highest sensitivity is showed at the design parameter A and D. As the spiral number of insert is increase, tension force applied its edge is distributed at whole model and the stress concentration is reduced.

AC PDP에서 2차원 수치해석을 이용한 Ramp Reset 구동파형에 따른 방전 특성 분석 (The Discharge Characteristic Analysis of a Ramp Reset Waveform Using a 2-Dimensional Numerical Simulation in AC PDP)

  • 박석재;최훈영;서정현;이석현
    • 대한전기학회논문지:전기물성ㆍ응용부문C
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    • 제53권12호
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    • pp.606-615
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    • 2004
  • The discharge characteristics of a ramp reset waveform in the alternating current plasma display panel(ac PDP) were studied using a 2-dimensional numerical simulation. We analyzed the wall charge variation during the reset discharge, address discharge and sustain discharge adopting a ramp reset waveform. Then we investigated the principal parameters for a successful discharge. In this paper, we suggest a new parameter, printing particles' density and its effects on the stability of the ramp discharge. The maximum current flows of the three electrodes during the ramp reset period were decreased with the increase in the priming particles's density which was explained with the wall charge characteristics and the current flow characteristics obtained by a 2-D simulation.

인쇄 잉크의 최대 전이율에 관한 연구 (Studies on the Maximum Transfer Rate of Printing Ink)

  • 강상훈
    • 한국인쇄학회지
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    • 제13권1호
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    • pp.1-12
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    • 1995
  • Polymeric mesogens having a regularly alternating rigid-flexible repeating structure in the main-chain polymer exhibit distinct even-odd oscillation in their thermodynamic quantities with respect to the number of methylene units in the spacer. The even-odd oscillation depends on the number of methylene groups in the spacer the entropy change at the NI(nematic-isotropic) phase transition becomes less distinct when the linking group is replaced by the carbonate. In our previous work, we have suggested that the characteristics arise from the geometrical arrangement of the linkage. In this work, we have prepared a series of carbonate-type monomer and dimer liquid crystals. The thermodynamic behaviors at the NI phase transition have been compared with those previous reported for the ether- or ester-type liquid crystals. For the dimer series, the orientational order parameter of the mesogenic core was determined by using H-NMR technique. The origin of the difference observed among linking groups was found to the geometrical characteristics of chemical structure.

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2축 디지틀 윤곽제어 (Digital Contouring Control of Biaxial System)

  • 이건복;고태근
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1998년도 추계학술대회 논문집 학회본부 B
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    • pp.435-437
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    • 1998
  • In this productive system, it needs to control the each axis motion harmoniously to perform accurately for the manufacturing, transporting and printing. Independent Axis Control usually used for this objection. However, if Independent Axis Control mismatched the parameter of each axis system or in the case of free curve tracking or the case of high speed control, there would be big contour error so that cannot achieve control objection. As a result, there is Contour Control method suggested to supply for this defect. This paper carried modeling of biaxial system and implemented Independent Axis Control & Contouring Control on straight line, circular, and coner path by simulation and experiment. If feedrate increased, contour error growed. In consequence, according to this factor, we introduced contouring controller, so we could find the fact that contour error was reduced more than that of independent axis control about each path.

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