TPU 인써트 사출 공법을 이용한 무도장 하드 타입 판넬 부품 개발

가석순(Suksun Ka),김영준(Youngjun Kim),안성준(Sungjun Ahn),이동우(Dongwoo Lee) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11

The automotive interior parts have been produced by the injection molding process. To improve the productivity, light weight, and surface quality improvement, various injection process technologies are developing. In this paper, TPU (Thermoplastic Polyurethane) material, which is usually used for the skin of the instrument panel by powder slush molding, is applied to the surface part of the PAB (Passenger Airbag) door through the injection molding to enhance the soft touch feeling instead of the plastic hard feeling and get the mold-in color interior parts satisfying the same surface quality level of the painted interior parts. The residual thickness of PAB deploy area is chosen through the Finite Element Analysis for the PAB deployment performance. Through comparing the door opening force by the analysis and the test, the physical properties of TPU inputted to the analysis was corrected, and the optimized residual thickness is determined by the 2<SUP>nd</SUP> analysis using the corrected physical properties. Design the 2-layer structure of PAB door based on the analysis results, make the injection mold. The experimental test evaluating the performance of the PAB Door was performed by Hyundai-Kia test specifications.

자동차 내장 부품용 외관섬유류의 내구성 검증 방법

이정우(Jeongwoo Lee),김지중(Jijoong Kim),임영선(Youngsun Lim) 한국자동차공학회 2019 한국자동차공학회 학술대회 및 전시회 Vol.2019 No.11

The durability of automotive parts is important to be operated over 10-years by the customers. The durability of parts depends on its structure and material properties which composes the part. Automotive interior materials need to keep their performance and resist the aging against temperature change, humidity variation, sun lighting through the glass, and customers behaviors like ingress, egress and jounce etc. As the materials for direct contact and visible area by customer, appearance textiles need to retain their appearance and function for the life span of automobiles. In this paper, we discuss the general test procedures for evaluating the durability of automotive interior appearance textiles. The test procedures are classified as physical durability, temperature and humidity resistance, chemical resistance and soiling resistance.

자동차 내장 하드트림 부품의 명도별 적정 광택도 연구

홍정인,최경실 한국색채학회 2020 한국색채학회 논문집 Vol.34 No.1

In recent years of the color science field, there has been a lot of interest in research projects on the spectral prediction model, which can quantify not only color but also light and texture. In the absence of predictive models and measuring instruments, gloss management has received attention in color management. In this study, two surveys were conducted to obtain the visual satisfaction and color accuracy of the hard trim components in car interiors. First, the Lightness determined the most significant color attribute that affects the degree of gloss, and we revealed the correlation between Lightness and glossiness. Second, to find the degree of gloss that can satisfy both emotional and functional aspects, we conducted an irradiation and scratch resistance / staining test. In this study, 88 gray / beige scale group samples were searched to find the proper gloss for automotive interior hard trim parts, with correlation analysis through color / gloss measurement, designer and scratch resistance / stain. The following conclusions were made through analysis and findings. ① from lightness 25 to 60, ② from lightness 60 to 70, ③ over Lightness 70 color samples corresponding to Lightness indicate that the glossiness criteria should be set separately. As a result of the survey on the preferred gloss for color experts, up to 1.5GU of lightness 25 was preferred, and scratch resistance and stain resistance were satisfactory. Finally, the preferred glossiness survey of color experts favored 1.5GU on a Lightness 25, while the scratch and contamination acceptance criteria were all satisfied. In conclusion, we should controlGU such as between Lightness 25 and Lightness 60 is 1.5 ±0.2GU, between Lightness 60 and Lightness 70 is 2.0 ±0.2GU, and between Lightness over 70 is 2.5 ±0.2GU. However, it is recommended to combine visual evaluation.

가시광촉매가 처리된 자동차 내장재의 VOC 분석방법에 대한 연구

최세영 ( Sei Young Choi ) 한국고무학회 2013 엘라스토머 및 콤포지트 Vol.48 No.3

가시광촉매가 처리된 자동차내장재의 VOC 분석방법에 있어서 샘플백에 충진하는 질소 대신 공기를 충진하여 시험하였다. 그 결과 자동차내장재의 VOC 분석시 질소를 충진한 샘플백은 VOCs 및 폼알데히드의 저감효과가 나타나지 않았다. 그러나 질소대신 공기를 충진한 샘플백에서는 VOCs 및 폼알데히드가 현저하게 감소하였으며 자동차내장재의 VOCs 분석시 샘플백에 질소 대신 공기를 충진하여야 가시광촉매에 의한 효과를 발휘할 수 있다는 것을 확인하였다. In this study, VOC analysis method of vehicle interior materials and parts treated to visible-light responsive photocatalyst was tested by sample bag filled with air instead of nitrogen. As a result, when analyzed VOC of vehicle interior materials and parts, sample bag filled with the nitrogen was not confirmed of effect reducing VOCs and formaldehyde. However, VOCs and formaldehyde of sample bag that was filled with air instead of nitrogen, decreased significantly. Reaction effect for visible light-responsive photocatalyst was confirmed that sample bag of vehicle interior materials and parts should be filled with air instead of nitrogen.

가시광촉매를 이용한 자동차 내장재로부터 발생하는 VOCs의 저감연구

최세영 ( Sei Young Choi ),양승기 ( Seung Gi Yang ) 한국고무학회 2013 엘라스토머 및 콤포지트 Vol.48 No.3

가시광촉매를 이용하여 자동차 내장재에서 발생하는 VOCs의 저감 효과를 알아보았다. 가시광촉매는 sol-gel법으로 제조하였으며 UV-vis peak가 420 nm에서 적색이동 되어 가시광영역에서 감응하는 것으로 나타났다. 이러한 특성을 갖는 가시광촉매를 자동차 내장재에 코팅처리하고, 자동차 내장재에서 발생하는 VOCs를 측정한 결과 분해·저감율이 우수하게 나타났다. On this study, visible-light responsive photocatalyst prepared by sol-gel method was evaluated the effect of the reduction of volatile organic compounds (VOCs) occurred in vehicle interior and its property was examined. According to UV/visible result, visible-light responsive photocatalyst was found that the UV-visible peak is red shift at 420nm, is sensitive in the visible light region. With vehicle interior parts and materials coated visible-light responsive photocatalyst, VOCs was measured by GC/MS. Measuring the VOCs generated from vehicle interior parts and materials, the reduction of VOCs was confirmed.

플라스틱 소재의 기계적 특성과 재료모델링에 관한 연구

김대영(Dae-Young Kim),Ngoc-Trung Nguyen,김영완(Youngwan Kim),김동현(Donghyun Kim),김동석(Dongsuk Kim),김헌영(Heon Young Kim) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11

Interior parts of automotive are made of polymers like rubber, foam, plastics and composite materials and are directly related to the impact behavior of passenger at crash event. Especially, plastics is widely used in the interior parts due to the low price, reduction of weight and formability. However, material modeling of plastics is difficult because of the material characteristics such as softening, dilatation and pressure dependency. Usually, the material modeling of plastics considers the methods applying in the metal materials, but it is not suitable in the large deformation problem like crash analysis. So, the material models which express the mechanical characteristics of plastics exactly are needed. The LS-DYNA commercial software recommends several models for plastics. In this paper, several models which are suitable for plastics are compared. Experiments process and specimens are introduced to obtain the material parameters. To simulate the coupon test, F. E. modeling was constructed and compared with experiment data.

자동차 내장 플라스틱 파트 코팅을 위한 UV 경화형 코팅액의 가교와 표면의 기계적 물성과의 상관관계

김소현(So Hyun Kim),이동근(Dong Geun Lee),이지원(Ji Won Lee),오대근(Dae Geun Oh),손인태(Intae Son),이준협(Jun Hyup Lee),김현정(Hyunjung Kim),정현욱(Hyun Wook Jung) 한국고분자학회 2020 폴리머 Vol.44 No.1

자동차용 내장 플라스틱 파트에 적용되는 UV 경화형 도료는 아크릴레이트 단량체와 우레탄 아크릴레이트 올리고머로 구성되어 있다. 본 연구에서는 UV 경화형 도료에 광개시제, 자외선 흡수제와 HALS계 자외선 안정제를 포함하는 내광 첨가제 및 소광제 등 다양한 첨가제들을 첨가함으로써 실시간 UV 경화 거동과 경화 이후 코팅 표면의 기계적 물성들의 변화를 고찰하였다. 각 UV 경화형 도료의 경화 거동은 적용가능한 실제 공정 조건 범위에 따라 표면 물성 변화를 토대로 해석되었다. 경화 거동은 강체 진자형 물성 측정기로 확인되었고, 경화 정도는 푸리에 변환 적외선 분광법(FTIR)을 활용하여 분석하였다. 나노 인덴테이션과 나노 스크래치 측정기를 사용하여 경도, 스크래치 저항성 등 기계적 표면 물성을 측정하였다. 이와 같은 분석 과정을 통해 최적의 경화 공정 조건을 선정했으며, 내장 플라스틱 파트에 적용될 도료의 경화 거동과 경화 이후 특성 간 상관관계에 대한 첨가제의 역할을 체계적으로 규명하였다. UV curable coatings for automotive interior plastic parts are composed of acrylate monomer and urethane acrylate oligomer. In this study, the real-time UV curing behavior and the mechanical properties of the coating surfaces were scrutinized by adding additives such as photoinitiator, UV stabilizer including UV absorber and HALS, and matting agent to UV curable coatings. The curing behavior of UV curable coatings was interpreted based on the changes in surface properties, depending on the applicable actual curing conditions. The curing behavior was checked by a rigid-body pendulum tester and FTIR. The mechanical properties of coatings, such as hardness and scratch resistance, were measured via nano-indentation and nano-scratch testers. The optimum curing conditions were selected using measurement tools and the role of the additives for establishing the correlation between the curing dynamics of coatings for interior plastic parts and properties of cured films was systematically elucidated.

CUMULATIVE LIGHT INTENSITY OF AUTOMOTIVE GLASS: A COMPARATIVE STUDY ON COMBINATION OF OPTICAL FILTER FOR ACCELERATED WEATHERING TEST

Eun Hee Jo,Il Han Kim,In-Soo Han,Chang Hwan Kim 한국자동차공학회 2019 International journal of automotive technology Vol.20 No.4

The aim of this study was to establish a test method with improved reliability and reproducibility for the accelerated weathering test of automotive interior materials. For this purpose, this study measured the spectral power distribution (SPD) of the glass used in actual vehicles in the oceanic climate region of South Korea (Seosan) and in the desert climate region of North America (California Proving Ground). In addition, the SPD was measured according to the position of automotive interior parts, and cumulative light intensity was calculated using the curve fitting method. Results showed that the measured light intensity varied according to the position of interior parts because of numerous variables such as the type of glass, angle of sunlight, and frames of vehicles. We investigated the cumulative light intensity of the solar glass used in this study and the glass of other manufacturers, and the obtained data were incorporated into a data base (DB). Understanding the optical characteristics of filters is important accelerated weathering tests (Xenon). Therefore, we compared the SPD and cumulative light intensity of each filter combination and actual automotive glass to confirm the suitability of the filters for weathering tests.

자동차 내장부품에서 발생되는 VOCs 평가기술

윤주호(Ju-Ho Yun),유승을(Seung-Eul Yoo),김태은(Tae-Eun Kim),김장훈(Jang-Hoon Kim),송병찬(Byeong-Chan Song) 한국자동차공학회 2008 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-

고속전철 내 · 외장재용 알루미늄 합금의 압출 금형 개발 및 압출 조건의 제어

김기주(Kee Joo Kim) 한국산학기술학회 2018 한국산학기술학회논문지 Vol.19 No.7

압출기술에서 중요한 것은 금형의 설계 및 제작이며, 원하는 형태의 압출이원활히 이루어지는동시에 금형의 수명을 최대한 연장하고 효율성을 높이기 위한 금형의 설계가 필수적이다. 압출 온도, 압출 속도 등이 압출시의 주된 변수이며, 압출비 및 재료의 물성, 압출 형태에 따라 각기 다른 조건이 부가되어야 한다. 본 연구에서는 고속전철 내외장재 부품용 알루미늄 6xxx 계열 주조 합금의 압출공정에 대해 연구하였다. 6063, 6061, 6N01, 6005, 5083 and 6060 알루미늄 합금의 압출 금형단면을 설계하였으며 이에 대한 실험을 실시하였다. 또한, 빌렛온도, 압출온도 및 재료의 변화에 따른 압출 압력과 같은 압출조건들을 분석하였다. 6063 알루미늄 합금이 가장 낮은 온도와 압력에서 압출이 가능한 반면 6061 합금은 가장 높은 온도와 압력에서 압출이 가능하였다. 이들 실험결과로부터 수립된 조건들을 이용하여 성공적인 압출제품을 제조할 수 있었다. The important thing in extrusion technology is the design and production of molds. Appropriate design of the molds is essential for achieving the desired extrusion of molds at the same time to maximize the life of the molds and increase their efficiency. The extrusion temperature and extrusion speed are the main parameters at the time of extrusion. Different extrusion conditions should be added depending on the extrusion ratio, physical properties of the material, and type of extrusion. In this study, the extrusion process of various 6xxx series aluminum cast alloys for high speed train interior or exterior parts were investigated. The extruded die design was performed for the 6063, 6061, 6N01, 6005, 5083 and 6060 alloy profiles and an extrusion test was conducted. In addition, the extrusion conditions, such as extrusion pressure following as the billet temperature, extrusion temperature, and materials change, were analyzed. Although the 6063 aluminum alloy can be extruded at the lowest temperature and pressure, the 6061 alloy can be extruded at the highest temperature and pressure. From these results, the successful extruded products were manufactured from these established conditions.