Carbon black is a material in the form of fine black powder obtained by incomplete combustion or pyrolysis of hydrocarbons, and is composed of 90-99% carbon, and the rest is composed of hydrogen and oxygen. In the event of an emergency during the manufacture of carbon black, the generated tail gas should be safely discharged through an emergency line to prevent fire, explosion, and environmental pollution accidents caused by the tail gas. If the pressure continues to rise, the pressure control valve shall operate and the rupture plate shall be ruptured sequentially and the tail gas shall be discharged to the vent stack through the emergency line. As an emergency emission system, even if some untreated substances in the tail gas are released into the atmosphere, they are lighter than air, so it is safe to discharge them to a safe place through the Vent Stack. If the gas pressure is rising or worse, it is discharged from the Vent Stackine, and discharging fuel.

This study investigated the method of continuous improvement of small-medium company production processes through POSCO's QSS(Quick Six Sigma) activities. QSS is a field operation technique that encompasses the advantages of Six Sigma, TPS(Toyota Production System), TQM (Total Quality Management), and IE(Industrial Engineering). Through this, POSCO not only encourages activities centered on related small and medium-sized partners, etc., but is also expected to contribute to the continuous improvement of the company's own production process through QSS activities. In this study, rather than unconditionally carrying out activities according to the needs of large companies, the research is to help the continuous improvement of the actual production process of small and medium-sized enterprises by effectively applying and spreading QSS activities in consideration of the characteristics and environment of the company. For this purpose, empirical research is conducted on the process improvement activities and QSS activities of company Y, which has less than 100 assembly and production quality and inspection processes among SMEs. The changes in the production process improvement of SMEs through the application of the final QSS were investigated through empirical studies.

The purpose of this research isto make improve productivity through process improvement without expensive capital investment in a small scale mold manufacturer. The target company which is selling sand mold casting products employs many foreigners, and 50% of factory workers worked by the periphery of a specific manufacturing sector were difficult to communicate smoothly on site. Also, the company has the customized production method which production and delivery time are constant each month. However, the company's situation is getting harder since the order volume of existing suppliers has decreased and profit has reduced. So, we decided that the company needs new customers and overseas markets in the long run but to improve the process without facility investment in the short term is important task. We improved the process, created the standard of work for foreign workers, and improved the working environment by eliminating the on-site risk factors that the staff could not perceive. The results were as follows. The productivity has improved by 1.5 times. Training by work standards has shortened the OJT time of new workers and efficient working methods have become standard. Improvement of the work environment has improved the job satisfaction of workers and enabled long-term service of workers in the mold industry where labor shortage is serious.

The purpose of this study is to improve a process of the automatic manufacturing system for producing a phosphor bronze wire developed the previous study. For this purpose, the authors have improved the manufacturing process, such as wire tension control, discoloration, winding and the control appears as a problem when the automatic manufacturing system applied to the field. Also, performance tests for the developed system such as the straightness, tensile strength, hardness, diameter deviation, discoloration have been performed. As a result, we could product the 0.35mm of phosphor bronze wire with continuous processes. The performance of the prototype system satisfies all the objects of this study.

The purpose of this paper is to analyze the problems and the sources of defective products and draw improvement plans in a small plastic boat manufacturing process using TOC (Theory Of Constraints) and statistical analysis. TOC is a methodology to present a scheme for optimization of production process by finding the CCR (Capacity Constraints Resource) in the organization or the all production process through the concentration improvement activity. In this paper, we found and reformed constraints and bottlenecks in plastic boat manufacturing process in the target company for less defect ratio and production cost by applying DBR (Drum, Buffer, Rope) scheduling. And we set the threshold values for the critical process variables using statistical analysis. The result can be summarized as follows. First, CCRs in inventory control, material mix, and oven setting were found and solutions were suggested by applying DBR method. Second, the logical thinking process was utilized to find core conflict factors and draw solutions. Third, to specify the solution plan, experiment data were statistically analyzed. Data were collected from the daily journal addressing the details of 96 products such as temperature, humidity, duration and temperature of heating process, rotation speed, duration time of cooling, and the temperature of removal process. Basic statistics and logistic regression analysis were conducted with the defection as the dependent variable. Finally, critical values for major processes were proposed based on the analysis. This paper has a practical importance in contribution to the quality level of the target company through theoretical approach, TOC, and statistical analysis. However, limited number of data might depreciate the significance of the analysis and therefore it will be interesting further research direction to specify the significant manufacturing conditions across different products and processes.

The application of sublimation transfer printing is widely expanded in the textile industry according to the growth of IT technology. Therefore, its improvement of manufacturing process is strongly needed. In this paper, new manufacturing process of sublimation transfer printing by combining conveyor system and hot plate pressing is developed. New process has improved quality and productivity of sublimation transfer printing. It is shown that the new process has better indices than existing process in the required time, man power, production output and sales. New process is able to cope with mass production and various manufacturing condition actively.

HCFFT (Hybrid Concrete Filled FRP Tube) is consisted of pultruded FRP unit module, filament winding FRP which is in the outside of mandrel composed of circular shaped assembly of pultruded FRP unit modules, and concrete which is casted inside of the circular tube shaped hybrid FRP pile. The pultruded FRP can increase the flexural load carrying capacity and the filament winding FRP can provide the confinement for the concrete filled inside. The axial and flexural load carrying capacities of small diameter HCFFT piles were evaluated through the experimental and theoretical studies. In this study, we suggest the cross-section and manufacturing process of large diameter HCFFT pile which is expected to improve the quality and productibility of large diameter HCFFP pile.

The present study investigated the concentration of gaseous odor emitted from paint manufacturing facilities and the cases of improvement for odor emission reduction. It was found that the companies located in odor management district observed the odor emission standard more than the companies located in other local industrial complex. We ascribed the reason to the continuous crackdown by local government and voluntary efforts of each companies. Finally, we described the improvement cases of process for odor emission reduction.

This essay talks about research of robust design for quality improvement of production procedure of Wet Etchant. It suggested the optimum design method in consideration of specific capability value that is the way to maximize the quality of product in the production system by using Daguchi parameter design method while finding factors affecting product quality with analysis of production system of product A from producer D. Also, it set long term of 6months as noise factor and let it to be the robust design that can find the optimum condition of control factor that is dull to the changes of each month, that is the change in noise factor. The control factor which affects the product quality is decided as combination method, temperature of raw material, combination time and as there are too many possibilities for combination methods, we performed 4 methods first based on previous research data then derived three ways with product that passed SPEC and set as the factor. As a result of application of optimum production procedure suggested in this essay to the actual production process with its standardization, there was a effect of drop of more than 10particles in comparison to the particle number of previous product and also it brought the effect that resulted the stable number of particle of under 30 that is what the client company suggested.

This study was conducted to develop radish as a food product for home meal replacement using superheated steam (SHS). Also, the change of quality characteristics was studied during their storage. The radish cuts were treated with SHS for 0, 3, 5, and 7 min, respectively, followed by complete drying at 80℃ for 6 hours. The results showed that radishes restored with mixed solution (drinking water:sugar:vinegar:salt=2:1:0.8:0.1) were harder than those restored with drinking water. All radishes were stored at 5, 10 and 15℃ for 56 days to investigate the changes of quality characteristics during the storage. Radishes in the control group, restored with drinking water and stored at 15℃, were spoiled after 7 days of storage. The radish in the experimental group did not show any change in the water content; except an increase on the first day of storage. The hardness of radish decreased with an increase in the storage period. It was found that microbial growth was inhibited due to low pH of the mixed solution, in which radishes of the experimental group were immerse.

Background : Bitter gourd (Momordica charantia) is a vegetable with pantropical distribution and contains the active ingredient, such as momordicine and charantin. Moreover, bitter gourd has been reported to exhibit antidiabetic, anticancer, cardiovascular-protective and antioxidant effects. But, the distinctive bitter taste of bitter gourd was not suitable for food preference. This study was conducted to evaluate the improvement effects of bitter taste of bitter gourd with natural fermentation and roasting process. Methods and Results : Bitter gourd fruits were obtained from Headeulnyeokae Co., Ltd.(Gang-Jin 59253, Repubilc Korea). Fruits of bitter gourd were prepared by natural fermentation process for 4h at 25℃. After natural fermentation, the fruits were dried in hot-air dryer for 15h at 49-55℃. The dried fruits were roasted in 500 g batches at 120℃ for 10 min in the electric rotisserie oven. After roasting, fruit pieces were extracted with hot water and cold water. One of them was cool-type, and the other was hot-type bitter gourd tea. In the sensory evaluation, hot tea and cold tea showed the high scores on color, flavor and overall acceptability. Conclusion : These mean that roasted bitter gourd had less bitter, and it could be utilized widely as drink and food material.