• Safety and Health at Work
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• 제4권4호
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• pp.216-220
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• 2013

A 46-year-old man who had worked as a bumper spray painter in an automobile body shop for 15 years developed lung cancer. The patient was a nonsmoker with no family history of lung cancer. To determine whether the cancer was related to his work environment, we assessed the level of exposure to carcinogens during spray painting, sanding, and heat treatment. The results showed that spray painting with yellow paint increased the concentration of hexavalent chromium in the air to as much as $118.33{\mu}g/m^3$. Analysis of the paint bulk materials showed that hexavalent chromium was mostly found in the form of lead chromate. Interestingly, strontium chromate was also detected, and the concentration of strontium chromate increased in line with the brightness of the yellow color. Some paints contained about 1% crystalline silica in the form of quartz.

• 한국컴퓨터정보학회논문지
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• 제28권2호
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• pp.209-216
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• 2023

본 논문에서는 조선소 페인트 분사작업에서 분사 거리와 속도의 변화에 따라 페인트 두께를 추정할 수 있는 모델을 개발하고자 한다. 이를 위해 도장로봇을 이용하여 다섯가지 서로 다른 분사 거리와 속도값에 대한 실험 데이터를 취득하였다. 또한 노즐의 훼손 등으로 인해 노이즈가 발생하는데 이를 처리하기 위해 적절한 전처리과정을 적용하였다. 제안하는 방법은 주어진 데이터로부터 분사 거리와 속도에 대한 페인트 두께 추정 함수를 새로운 분사 거리와 속도에 대한 페인트 두께 추정 함수로 변형하는 계산을 한다. 인공신경망기반 예측 모델과 비교한 결과 제안하는 방법이 더욱 안정적이고 정확하게 예측할 수 있음을 확인할 수 있었다.

• 한국CDE학회논문집
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• 제16권1호
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• pp.61-72
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• 2011

As the customer's needs for diverse colors, the process of bus painting shop is becoming more and more complex. In particular, frequent changes of paint colors in each spray process require the cleaning of the painting nozzles and setting them up for the new paints, which results in increased time and cost and reduced production. This also increases environmental influences. This paper proposes, as a solution to this issue, the use of color selection field (CSF). CSF is physically a system of conveyors that are used to rearrange objects in a flow line. CSF is proposed, in this paper, to be introduced right before the spray process so that buses are better grouped according to their desired colors. Various parameters of the CSF, such as the number of conveyors and algorithms to determine the rearranged sequence of buses, have been determined by running simulations using the digital manufacturing technology, and investigating the simulation results. As an outcome of the proposed solution, the CSF system is expected to reduce approximately 30% of the nozzle cleaning cost for a Korean motor company case, which will not only benefit the company economically, but will also benefit the environment.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1986년도 한국자동제어학술회의논문집; 한국과학기술대학, 충남; 17-18 Oct. 1986
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• pp.188-190
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• 1986

In this paper, we describe an optical detection at the front and design an on-off control system of spray gun for economical paint spray when painted on hanger any things that it have arbitrary two-dimensional image. The objectives of this paper that, as changing of software, find useful logic variation of spray, and are to enhance of environments for workman and to decrease economical loss of painting.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2013년도 춘계학술대회 논문집
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• pp.1229-1230
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• 2013

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1991년도 한국자동제어학술회의논문집(국내학술편); KOEX, Seoul; 22-24 Oct. 1991
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• pp.545-550
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• 1991

Recently, the use of robots for painting operations has received much attention, as it is a powerful means for automation and quality improvement. Collision-avoidance is a key issue in the path planning for painting operations. In this paper, we develop a computationally efficient algorithm for the generation of collision-free path for two types of motion: a) Gross motion when the robot approaches the painting area, and b) Fine motion while spraying the surface. The former is a typical collision-avoidance problem, but the latter calls for special attention as the painting mechanics has to be incorporated into path planning. The developed algorithm is applied for the internal coating of the car body whose structure is the major source of collision.

• 패션비즈니스
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• 제16권3호
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• pp.13-31
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• 2012

The purpose of the study was to analyze the work clothes' clothing comfort and wearer mobility of painting workers with the consideration of the work environment features in the machine and shipbuilding industries in South Korea. A questionnaire survey was conducted for the study, which consisted of questions on the clothing comfort and wearer mobility aspects of painting work clothes by clothes types and body parts. The work clothes' clothing comfort and wearer mobility levels were scaled in 5 points i.e. 1(: very tight/very uncomfortable) to 5(: very slack/very comfortable). The painting work environmental hazardous features were considered as high impact levels of workplace temperature, oxygen deficiency, organic solvent, toxic gas factors while metal fragment factor only impacts 'low' in the painting processes with the findings throughout this study. Since the painting work consisted of surface washing and the spray and touch-up painting processes, which was carried out in an outdoor work place, the painting work clothes should meet high performance of waterproofing from the painting material and air permeability specially in summer as well as thermal performance in winter. The subjects painting workers' assessment of the existing work clothes' clothing oppression was in the levels between 3 (i.e. moderate) and 4 (i.e. comfortable) in a range of 1 to 5 points. The existing painting work clothes' wearer mobility was evaluated 'very uncomfortable' in all work clothes parts, especially, armhole length, biacromial breadth, sleeve length of the jumper; and body rise, waist, hip, thigh and knee circumferences of the pants.

• 한국안전학회지
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• 제21권2호
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• pp.138-142
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• 2006

직업성 천식은 시안화물의 폭로에 의해 발생되는 것으로 알려져 있다. 남호주에 있는 가구산업에서는 일반적으로 목재판 위를 피복하기 위해 이중분사도포를 할 때 이소시안화물 도포제가 사용된다. 이 연구는 이와 관련 된 분야의 자료부족으로 관련 산업에서의 환경 및 피부와 안구폭로에 대한 모니터링을 위하여 수행되었다. 이 연구결과에 의하면 저압다량(HVLP)의 분사기 사용, 페인트 용액중의 저농도 경화제 및 전면 호흡보호구와 같은 적절한 보호구의 사용시에는 대기로부터 오염물질의 유입은 거의 없었고, 분사실 주변의 일반적인 작업범위에도 HDI 가 거의 감지되지 않았다. 페인트분사시의 일회용 장갑착용으로 피부폭로는 발견되지 않았으나, 칼라 모니터링에 의하면 장갑을 착용하지 않거나 청결하게 관리할 수 있는 공정이나 안전한 장소에 보관하지 않으면 작업장으로부터 피부폭로가 있었다. 페인트분사로부터 눈의 오염은 감지되지 않았고, 호흡기, 피부 및 안구에도 폭로되지 않았으며 유입과 가장 관련성이 있는 것은 작업형태이다.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2005년도 추계 학술발표회 제17권2호
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• pp.807-810
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• 2005

In this study, MMA-modified paste of coating material for protecting the concrete structures was developed. The coating material was applied to cement concrete specimens by brush, roller and spray in each of which one, two and three layers to survey, by the cold-hot iterative test, the neutralization test, the chloride ion permeation test and the ante-abrasion test, the affect of painting methods and layers influencing on the durability of coating material. Results of the cold-hot iterative test showed that, regardless of the painting methods and layers, the defects such as crack or fuzz on surface were not produced. As the number of painting layers increased, the neutralization prevention as well as the chloride ion permeation prevention effects were increased. On the other hand, no difference was found between the painting methods. Reducing weight by abrasion of polymer paste coating material was $20\%$ comparing to that of cement mortar.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2003년도 춘계학술대회 논문집
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• pp.1723-1726
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• 2003

Clean and well maintained roadway signs are important for preserving driver's safety. The existing signs on the roadway must be periodically re-painted in order to maintain clean state. However, current sign painting operations are manually performed now. These are very slow and workers are exposed to very dangerous and hazard working environment. In this paper, we present the method for automating this job with gantry robot and spray system. In addition, we suggest two design concepts to resolve the problem that it is impractical to make the gantry system so big as to cover whole lane width. In order to show the validity of this system, the painting operation is simulated and experimentally executed.