레이저프린터용 닥터 블레이드 생산 자동화

전성훈(Sung Hoon Jun),이응기(Eung Ki Lee) 한국생산제조학회 2012 한국생산제조학회지 Vol.21 No.4

The doctor blade is a core part of a laser printer and directly influences the printing quality. The main specifications for doctor blades ate for them to be precise and durable. It is necessary to study an automatic production system for doctor blades in order to obtain high-efficient manufacturing processes. In this paper, the technology and the design of the automatic production line has for manufacturing doctor blades has been researched. The automated manufacturing process consists of five steps, which are the supplying of raw material, shearing, bending, bracket supplying, and the laser-spot welding process. The proposed automatic manufacturing system allowed for faster and more reliable production of doctor blades.

레이저프린터용 닥터 블레이드의 자동화 생산 기술 개발

전성훈(Sung Hoon Jun),김민석(Minseok Kim),김숙한(Sookhan Kim),이응기(Eung Ki Lee) 한국생산제조학회 2011 한국생산제조시스템학회 학술발표대회 논문집 Vol.2011 No.4

Doctor blade which is required for precision and durability as main specifications is a core part for product life cycle and quality at a toner cartridge for a laser printer. A study about automation system is needed because of difficulty of mass-producing doctor blades at present. This paper was researched about technique automating production line of doctor blade. Automated manufacturing process for doctor blade consists of six steps that are supply of raw material, punching and cutting, pressing, supply of brackets, laser welding and moving finished product. And each step also was studied in this paper.

Doctor Blade-Coated Polymer Solar Cells

Namchul Cho(조남철),Jong H. Kim(김종현) 한국고분자학회 2016 폴리머 Vol.40 No.5

본 연구에서는 대면적 용액 인쇄장비인 닥터블레이드 코터를 이용하여 형성된 P3HT:PC71BM 및 PBDTTTEFT:PC71BM 벌크헤테로 졍션을 기반으로 하는 고분자 태양전지를 보고한다. 블레이드 코팅 인쇄공정으로 제작된 정구조와 역구조의 P3HT:PC71BM 고분자 태양전지로부터 기존 스핀코팅법으로 제작된 태양전지 성능보다 우수한 2.75, 3.03%의 광전변환효율을 얻을 수 있었을 뿐만 아니라, 개선된 소자 성능의 균일도가 확보됨을 확인하였다. 나아가 블레이드 코팅 공정을 이용하여 3.10%의 광전변환효율을 나타내는 PBDTTT-EFT:PC71BM 기반의 플렉시블고분자 태양전지를 구현함으로써 블레이드 코팅법이 향후 대면적 고속 롤투롤 프린팅 인쇄공정에 효과적으로 활용될 수 있음을 제시하였다. In this work, we report polymer solar cells based on blade-coated P3HT:PC71BM and PBDTTT-EFT:PC71BM bulk heterojunction photoactive layers. Enhanced power conversion efficiency of 2.75 (conventional structure) and 3.03%(inverted structure) with improved reproducibility was obtained from blade-coated P3HT:PC71BM solar cells, compared to spin-coated ones. Furthermore, by demonstrating 3.10% efficiency flexible solar cells using blade-coated PBDTTT-EFT:PC71BM films on the plastic substrates, we suggest the potential applicability of blade coating technique to the high-throughput roll-to-roll fabrication systems.

균일 화상 품질 구현을 위한 닥터 블레이드 접촉압력 근사모델링

최하영(Ha-Young Choi),박승찬(Seung Chan Park),이종수(Jongsoo Lee) 한국생산제조학회 2013 한국생산제조학회지 Vol.22 No.2

The doctor blade is equipped in a toner cartridge and is a device to maintain the uniform thickness of a toner by controlling the pressure on the developing roller. The contact pressure between the developing roller and the doctor blade is one of the significant factors for image quality and durability of toner cartridge. The purpose of this study is to develop approximation model in order to minimize the time and cost which are needed much required in making optimal design of the doctor blade. Central composite design was used for the design of experiment and response surface design was used for approximation. The data for contact pressure were acquired through finite element analysis and data of image density and toner weight were acquired through experiment. The approximation model developed in this study has presented very high fitness.

균일 화상 품질 구현을 위한 닥터 블레이드 근사모델링

박승찬(Seung Chan Park),이종수(Jong Soo Lee) 대한기계학회 2012 대한기계학회 춘추학술대회 Vol.2012 No.5-2

닥터 블레이드는 토너 카트리지에 장착되어 현상롤러에 일정한 압력을 가하면서 현상롤러에 묻는 토너가 균일한 두께의 층을 형성할 수 있도록 하는 부품이다. 현상롤러와 닥터 블레이드 간의 접촉압력은 화상 품질 분만 아니라 토너 카트리지의 내구성을 결정하는 중요한 요소이다. 본 연구에서는 닥터 블레이드의 설계 인자의 변화에 따른 두 부품간의 접촉 해석을 수행하고 조건별 심험 결과값을 통해 닥터 블레이드의 최적설계를 위한 근서모델링을 도출하였다. 중심합성계획법을 이용하여 실험점을 추출하고 FEM 툴인 NASTRAN을 이용하여 접촉 해석을 하였으며 각 조건별 샘플 제작 및 실험ㅇ르 통해 화상 농도와 단위 면적당 토너 무게를 측정한 결과를 바탕으로 반응표면법을 통해 근사모델을 도출하였다. The doctor blade is equipped in a toner cartridge and is a device to maintain the uniform thickness of a toner by controlling the pressure on the developing roller. The contact pressure between developing roller and doctor blade is one of significant factors in terms of image quality and durability of toner cartridge. The Present study explores the contact analysis according to change in design variables of doctor blade. The contact analysis is conducted using NASTRAN, and a number of design data is produced to construct the approximate meta-models in the context of design of experiments (or design analysis for computer experiments) based response surface method.

Fabrication of Cu2SnS3 Thin Films by Ethanol-Ammonium Solution Process by Doctor-Blade Technique

Yaguang Wang,Jianmin Li,Cong Xue,Yan Zhang,Guoshun Jiang,Weifeng Liu,Changfei Zhu 대한금속·재료학회 2017 ELECTRONIC MATERIALS LETTERS Vol.13 No.6

In the present study, a low-cost and simple method is applied to fabricate Cu2SnS3(CTS) thin films. Namely CTS thin films are prepared by a doctor-blade method with aslurry dissolving the Cu2O and SnS powders obtained from CBD reaction solution intoethanol-ammonium solvents. Series of characterization methods including XRD,Raman spectra, SEM and UV-Vis analyses are introduced to investigate the phasestructure, morphology and optical properties of CTS thin films. As a result, monoclinicCTS films have been obtained with the disappearance of binary phases CuS and SnS2while increasing the annealing temperature and time, high quality monoclinic CTS thinfilms consisting of compact and large grains have been successfully prepared by thisethanol-ammonium method. Moreover, the secondary phase Cu2Sn3S7 is also observedduring the annealing process. In addition, the post-annealed CTS film with a band-gapabout 0.89 eV shows excellent absorbance between 400 and 1200 nm, which is properfor the bottom layer in multi-junction thin film solar cells.

CO₂용 Pt전극/NASICON고체전해질/Carbonate (Na₂CO₃-K₂CO₃-CaCO₃ 계) 전극의 가스 센서제작 및 특성

최진삼,배재철,방영일,이덕동,허증수,Choi, Jin-Sam,Bae, Jae-Cheol,Bang, Yeong-Il,Lee, Deok-Dong,Huh, Jeung-Su 한국재료학회 2002 한국재료학회지 Vol.12 No.4

The NASICON solid electrolyte films, $Na_{1+x}Zr_2Si_xP_{3-x}O_{12}$(1.5< x < 2.3), was prepared from ceramic slurry by modified doctor-blade process. The NASICON solid electrolyte and fabricated sensors, Pt-electrode/NASICON/Carbonate$(Na_2CO_3-K_2CO_3CaCO_3\; system)$ electrode, were investigated to measure phase, microstructure and e.m.f variation for sensing $CO_2$ concentration. The uniform grain size of $2-4{\mu}m$ and major phase of sodium zirconium silicon phosphate phase, $Na_{1+x}Zr_2Si_xP_{3-x}O_{12}$was identified with X-ray diffraction patterns and scanning electron microscopy, respectively. The Nernst's slope of 84 mV/decade for $CO_2$ concentration from 500 to 8000 ppm was obtained at operating temperature of $400^{\circ}C$.

TIO₂ 전극의 소결온도에 따른 DSSCS 제조 및 성격

김성진(Kim, Sung Jin),박헌균(Pak, Hunkyun) 한국신재생에너지학회 2010 한국신재생에너지학회 학술대회논문집 Vol.2010 No.06

염료감응형 태양전지의 효율을 향상을 시키기 위하여, 이산화티타니아박막을 doctor-blade 방법으로 FTO 기판위에 15-16um 코팅을 한뒤, 다른 온도의 400?C-600?C 범위에서, 소결을 하였다. 상대전극은 FTO 기판위에 5Ml의 Pt용액을 가지고, 450?C온도에서 제작을 하였다. 실험의 결과 이산화티타니아의 표면거칠기 및 입자사이즈의 소결의 형상에 따라 DSSC의 효율의 상관관계가 영향을 받았다. 표면의 형상은 AFM으로 측정을 하였으며, 표면의 단차가 RMS의 값이 7nm이하 일 때, 효율의 향상을 이루었다. 실험결과 500?C 이하일 때, 상대적으로 낮은 open circuit voltage를 이루었으며, 낮은 Fill-factor를 이루었다. 500?C이상의 온도에서는 상대적으로 높은 high circuit voltage와 높은 fill factor를 나타내었다. 실험결과 500?C에서 소결된 전극을 가진 DSSC가 단락의 전압과 개방전류가 상호보완된 적정값을 가져 가장 개선된 FF와 Eff를 나타내었다. 이와 같은 특성은 이산화티타니아의 준위 모식도에서 설명이 될수 있고, 이산화티타니아의 최적의 necking 및 pore, 입자크기등이 제어될수 있음을 의미한다.

Control and Measurement of Doctoring Angle at Deformed State in Doctoring Apparatus for Printed Electronics

전성웅,김충환,김철 한국정밀공학회 2017 International Journal of Precision Engineering and Vol.18 No.5

In printed electronics, the performance of printed devices depends on the quality of the printed patterns, or printability. It depends on the printing ink, the printing equipment, and printing conditions. Therefore, for reliable printed patterns with high printability, the printing conditions should be optimized and then maintained at constant values. Among the various printing conditions, parameters related to the doctoring process are important in gravure printing. In this study, the doctoring angle is redefined by the contact angle between the master plate and the doctor blade at the deformed state rather than the undeformed initial angle. The doctoring apparatus, capable of varying the angle of the doctor blade by controlling the position of the blade at the desired position, is developed. To estimate the doctoring angle in the deformed state without measurement from the photo image, mathematical model that calculates the doctoring angle in the deformed state using only geometric properties are derived. The doctoring angles based on the proposed mathematical model are compared with those measured from direct photo images for verifying the proposed method. In addition, the effect of the doctoring angle on the printability of the printed patterns is examined qualitatively through an experiment.

은 잉크를 이용한 그라비아 오프셋의 전극인쇄에서 닥터링 공정의 영향

최기성,박진석,송정근,Choi, Ki Seong,Park, Jin Seok,Song, Chung-Kun 한국전기전자재료학회 2013 전기전자재료학회논문지 Vol.26 No.6

In this paper, we analyzed the effects of doctoring process on the patterns of Ag ink in gravure off-set printing. The parameters of doctoring process were the angle and the pressure, which was represented by the depth of blade movement to the gravure roll, of doctor blade to the surface of gravure roll, and the angle of patterns engraved on the gravure roll to the doctor blade moving direction. The proper parameters were extracted for the fine patterns and they were 15 mm for the pressure, $60^{\circ}$ for the blade angle. And the angle of patterns with respect to the blade movement should be less than $40^{\circ}$ for the best results. The gravure off-set printing with the above parameters was carried out to print gate electrodes and scan bus lines of OTFT-backplane for e-paper. The line width of $50{\mu}m$ was successfully obtained. The thickness of electrodes was $2.5{\mu}m$ and the surface roughness was $0.65{\mu}m$ and the sheet resistance was $15.8{\Omega}/{\Box}$.