• 한국생산제조학회지
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• 제20권5호
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• pp.653-658
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• 2011

In general, the purpose of packaging fasteners is a series of management activities to maintain the condition at the time of production until they get delivered to the end user. An automatic packing system for fasteners is consisted of bucket conveyor, slide feeder, vision inspection system, box-magazine conveyor system and automatic packing machine. Also, the automatic packing machine is consisted of six modules including charging device, clamping/opening device, sealing/cutting device, feeding/air-shower device, supplying/adjusting device and device frame, etc. In this paper, we proposed an automatic packing mechanism of the one station concept for packing work of fastener objects where the continuous batch work is performed in a finite space. The proposed one-station packing mechanism has been optimized through mechanical, dynamical, structural and fluid analyses. And it had been manufactured as the prototype of automatic packing machine. The field test for validation of performance was performed directly at the production line of bolt and screw. In the field test, this packing machine showed an efficiency of about 4.5 times the manual operation. It also showed 30% reduction in the consumption of packing materials compared to the manual operation. This automatic packing machine for fastener objects will be commercialized soon.

• 한국경영과학회:학술대회논문집
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• 대한산업공학회/한국경영과학회 2000년도 춘계공동학술대회 논문집
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• pp.17-20
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• 2000

가전업의 CKD(Complete Knock Down)업무는 해외의 바이어나 현지공장에 가전제품을 구성하는 부품/반제품들을 개별 포장하여 수출하는 물류업무이다. 이러한 CKD 업무는 가격경쟁이 치열한 부분으로 경쟁력 강화를 위해 물류비의 절감이 요구되고 있다. 특히 CKD 업무의 경쟁력 강화를 위해서는 포장품질과 적재율 향상을 위한 포장/적재의 최적화가 이루어져야 하며, 이를 지원하는 Packing Optimization System 의 구축이 절실히 필요하다. 본 논문에서는 가전업 CKD의 업무특징과 업무환경의 변화에 대해 기술하였으며, 환경변화에 대한 대응방법으로 가전업 CKD 업무를 위한 Packing Optimization System 의 주요 기능과 업무 프로세스를 제시하였다. 그리고, 시뮬레이션 방법을 이용한 Packing Optimization system의 구현 사례를 예시하였다.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2002년도 춘계학술대회 논문집
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• pp.561-564
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• 2002

With Rapid Prototyping system, the efficient packing in a fixed work volume reduces build time when multiple parts are built in a process. In this paper, an efficient and rapid packing algorithm is developed for SLS system that has cylindrical workspace. A genetic algorithm is implemented to place as many part as possible in a vat. For fast computation, a collision detection algorithm "k-DOPs Tree" is implemented.

• 농촌계획
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• 제5권2호
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• pp.1-13
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• 1999

Packing house is the regional center in which packing, sorting, storage, and selling of harvested fruits are taken care of all together. It is located at the producing centers, and commercializes their apples. Apple grading policies of chief producing centers should concentrate on enhancing functions and roles of its local packing house. Consequently new packing house policies for enacting individual grading standards at national and local levels should be developed. This study is to develop Korea packing house on the basis of field survey in New York State. Increasing the utilization of packing house is the main key to the success of apple grading project. Therefore, effective arrangement and utilization of sorting facilities should be evaluated and new system which enables apple farms, local cooperatives, and corporations to joint-utilize packing house must to be established.

• 환경위생공학
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• 제18권1호
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• pp.15-22
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• 2003

Treatability tests were conducted using EMC process to study the feasibility of applying this process as recycling-water treatment system in high density seawater aquaculture farm. To study the effect of organic and ammonia nitrogen loading on system performance, hydraulic retention time of reactor was reduced gradually from 12hr to 10min. The conclusions are can be summarized as follows. When the system HRT was reduced from 12hr to 10 min gradually, there was little noticeable change(reduction) in ammonia nitrogen removal efficiencies until 2hr of HRT, however, removal efficiencies were decreased dramatically when the system was operated under the HRT of less than 2hr. In case of organics(COD), there was no dramatic deterioration in removal efficiencies depending on HRT reduction. More than 90% of removal efficiencies were maintained successfully when the system was operated at the HRT of 10 min. In case of system performance depending on media packing ratio in reactor, there was little difference in each reactor performance depending on media packing ratio in reactor when the reactors were operated under the HRT of longer than 1hr, however, differences in reactor performances were considerably evident when the reactors were operated under the HRT of shorter than 1hr. That is, the more reactor was packed, the better reactor performed. When comparing reactor performance among 25%, 50%, 75% packed reactor, it can be judged that media packing ratio more than 50% plays no significant role in increasing reactor performance. For this reason, packing the media less than 50% is more reasonable way in view of economic. Such a tendency well agreed with the variation of ammonia-nitrogen removal efficiencies according to the media packing ratio in reactors at each HRT. Difference in effluent ammonia-nitrogen concentration between 50% media packing reactor and 75% media packing reactor was negligible. When comparing with the results of 25% packing reactor, difference was not so great.

• 공업화학
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• 제18권6호
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• pp.636-642
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• 2007

다양한 크기를 가진 다성분 입자의 충전분율을 정확하게 예측할 수 있는 소프트웨어 프로그램을 개발하였다. 이를 위하여 다양한 크기의 염소산암모늄(Ammonium perchlorate, AP)과 알루미늄(Aluminum, Al) 입자와 혼합물에 대한 충전분율 측정실험을 수행하였다. 실험에 의해 얻어진 충전분율은 개발된 프로그램에 의해 예측된 값과 비교하였다. 크기가 다른 2종류 입자의 혼합 충전의 경우 상대오차가 0.25~13.13%, 3종류 입자의 혼합 충전의 경우 0.13~10.01%로 나타나 실험값과 잘 일치하였다. 목표 충전분율을 얻기 위한 각 구성입자의 질량분율 contour를 프로그램을 통하여 구할 수 있으며 이를 통하여 충전시스템을 최적화 할 수 있다.

• 한국철도학회논문집
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• 제11권6호
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• pp.562-568
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• 2008

현대의 물류는 파렛트를 활용한 일관운송체계로 변화하고 있다. 더불어 포장용기의 적재율과 타 수송수단과의 정합성을 높이려는 노력도 병행되고 있다. 이와 같은 일련의 추세는 물류의 효율화를 통한 물류비 절감이라는 명제에 기반을 둔다. 파렛트를 이용한 일관수송에서 기본이 되는 것은 포장의 단위이다. 개별 포장의 크기와 형태가 포장용기의 적재율을 최대화시키도록 하는 것이 관건이기 때문이다. 또한 포장용기는 이차적으로 수송수단의 적재함이나 보관시설 등 연관된 물류활용에 영향을 미치기 때문에 포장의 단위가 미치는 파급의 범위는 넓다. 본 연구의 목적은 포장모듈 표준화 사업의 효과를 평가하는 척도(MOE)를 선정하고 이를 반영한 평가모형을 개발하는데 있다. 선행연구의 사례와 타 학문분야의 계량화 방법 등을 토대로 포장모듈의 표준화가 물류산업에 미치는 영향을 파악하고 이를 계량화하는 방안을 제시한다. 연구의 방법론적 측면에서 볼 때 물류활동 부문별로 나타나는 포장모듈 표준화의 효과를 어떠한 방법으로 계량화하고 가중치를 두어 하나의 대표값으로 추출하느냐가 관건이 된다.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 1992년도 추계학술대회 논문집
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• pp.335-338
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• 1992

To purpose of this study is to design and manufacturing of packing gland using CAD/CAM system. The computer system used in this study was constructed with CPU 80386, RAM memory 4M, VGA graphic card. We was composed with CAD/CAM system, with interface PC and NC milling machine. By using develop program, we designed packing gland and it's manufactured. The basic structure of automatic production system for packing gland was established.

• 한국안전학회지
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• 제14권3호
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• pp.101-109
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• 1999

This study attempts to analyse the solid mixing in the feeder and the packing effect for pressure fluctuations in the fluidized bed. To study the mixing characteristics of solid in vibrating feeder for the stable operations of fluidized combustion, the system consisted of two groups of particles such that fine particles were located on the top of the coarse particles before vibratory mixing had started. The effects of packing materials on the pressure fluctuations in a fluidized bed were analysed by using a statistical method to interpret the behavior of fluidized bed. The experiments were carried out in a fluidized bed of 6.7cm-ID, and the experimental variables were particle sizes, of 115 to 1,015$\mu\textrm{m}$ in diameter and the multi-sized particles haying Rosin-Rammler and Gaussian distributions. The settled bed heights of particles to diameter ratios (L/D) were ranged from 0.5 to 2.0. And fluidizing of particles was carried out by air. The packing materials used were screen packing, and the properties of the pressure fluctuations in the fluidized bed were measured by a differential pressure transducer. The properties of the pressure fluctuations calculated were the mean, the standard deviation, and the major frequency of the power spectral density functions. From the characteristics of fluidizing, it was found that the standard deviation of pressure fluctuations could be effectively used to explain the fluidized phenomena, and the packing materials affected severely the properties of the pressure fluctuations. As a result, from the interpretation by spectral analysis, the effects of measuring radius of pressure fluctuations on standard deviation were constant in the case of the fluidized bed with and without packing materials. However, the effects of measuring the height of pressure fluctuations on standard deviations were linear increasing for the fluidized bed with packing materials, but were constant for the fluidized bed without packing materials at 4.5cm above the gas distributor. The major frequency of pressure fluctuations was found to be nearly independent of fluidized system. Also, the major frequency of pressure fluctuations decreased with increasing packing size, and it had maximum value at 10% of the packing amount.

• 대한안전경영과학회지
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• 제9권3호
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• pp.63-71
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• 2007

Recently, many companies knock themselves out to reduce logistics costs. However, they have reached the limit on cost reducing by improving the manufacturing process. In addition, Customers are growing more and more particular about the quality. Also the firms, which provide foods & beverages manufacturer with vacant receptacles and bottles, make zealous efforts to save costs. They have tried to seek for the resolution by own investment and improving system, but they haven't found certainly substitutions. In this study, we analyze problems of the vacant receptacles manufacturers and present introduction of pool system by standardization of Packing Resource. This PPS(Packing resource Pool System) will enable to reduce logistics cost that is challenge for the receptacles & bottles manufacturers, be helpful reducing environmental disruption which are the pollution of alien substances, wasted paper sheets because the system cleans retrieved Packing resources and reuses them.