자동차용 웨더스트립의 성형을 위한 스택몰드 개발

한성렬,전승경,김준형,정영득,Han, Seong-Ryeol,Jun, Seung-Kyeong,Kim, Jun-Hyeong,Jung, Yeong-Deu 한국금형공학회 2008 한국금형공학회지 Vol.2 No.1

Recently, the demand of high-productivity injection mold increases since the consumption of packaging grows in the world. Stack mold is composed of more than two molds and it has very high productivity and economic efficiency. In this study, stack mold was developed to improve productivity of vehicle fixed weather strip with TPV materials and to investigate the characteristic of injection molding using CAE.

수치해석을 이용한 냉장고용 유리선반 성형용 인서트 금형의 개선

한성렬(Seong-Ryeol Han) 한국기계가공학회 2016 한국기계가공학회지 Vol.15 No.6

Refrigerator glass shelves are manufactured by Insert Injection Molding. The current process of injection of glass into the mold induces movement of the core, on urethane springs. Defects in the product can result from too low a force being transmitted from the springs. To solve this problem, the force on the moving core and the injection molding pressure were subjected to numerical analysis. Based on this, the number of urethane springs as well as their hardness was changed to improve the situation. The number of springs was changed from 6 to 4. The diameter of the springs was increased from Ø75 to Ø100, and the hardness was increased from 70 (shore A) to 90 (shore A). These improvements caused the force on the molding core to increase by approximately 65,442 N. The proportion of defects decreased by 66%.

주파수 응답해석을 이용한 자동차용 에어컨 라인 어셈블리의 진동전달 특성에 관한 연구

한성렬(Seong-Ryeol Han),곽재섭(Jae-Seob Kwak) 한국기계가공학회 2013 한국기계가공학회지 Vol.12 No.3

An automotive air conditioning assembly consists of a condenser, a compressor and an evaporator. These major components are connected with rubber hoses and aluminum pipes. Once mounted on the automotive air conditioning assembly, it is exposed to a serious vibration environment for a long time. In some cases, there are vibration cracking on the assembly. In order to solve this vibration problem, several real vibration tests are performed on the assembly of which the lay-out was optimized, in spite of sample production cost and making time. In this study, a frequency response analysis, which is a kind of finite element method of the vibration, was performed to know the characteristic of the vibration transmission on the assembly lay-out. The analysis result indicated the damping performance, which is satisfied with the vibration standard of car maker, in rubber hoses and the whole assembly.

사출성형 조건과 ABS 성형품 광택의 관계

한성렬(Han, Seong-Ryeol) 한국산학기술학회 2013 한국산학기술학회논문지 Vol.14 No.11

최근 플라스틱 성형품은 기능적인 측면뿐만 아니라 디자인 및 광택과 같이 시각적으로 즉각 식별이 가능한 부분에 까지 많은 관심과 주의를 기울이고 있다. 이와 관련하여 성형품 광택의 제어를 위하여 성형조건이 광택에 미 치는 영향에 대한 연구가 필요하지만 관련 연구는 아직 충분히 이루어지지 않고 있다. 따라서 본 연구는 플라스틱 성 형품의 외관에 주로 사용되는 ABS (Acrylonitrile-Butadiene-Styrene) 플라스틱 성형품에 대하여 사출압력, 사출속도, 보 압력, 수지온도, 금형온도 등의 사출조건의 변화가 성형품의 외관 광택에 미치는 영향에 대하여 사출실험을 통하여 연구하였다. 연구 결과에서 보압력이 가장 큰 영향을 미침을 알 수 있었다. 특히, 보압력 55 – 75MPa 범위에서는 광 택도가 증가하지만 그 이상 증가하면 광택이 감소하는데, 그 원인은 SEM(Scanning Electron Microscope)을 통하여 수 지 내부의 고무 입자의 변형에 기인한다고 유추할 수 있었다. Plastic product manufacturing industry has usually focused on a mechanical and physical characteristics of molding. Recently, not only these characteristics but also the aesthetic value is significantly considering. Especially, the molding’s gloss, which we can easily distinguish, is an important aesthetic point. In this study, it were investigated that the gloss variation of ABS moldings by changing injection conditions such as injection pressures, injection speed, holding pressures melt and mold temperatures by injection molding experiment. The experimental results revealed that the holding pressure was the most active condition on gloss of ABS molding.

수치해석을 이용한 토글식 100톤 사출성형기의 중량 개선에 관한 연구

한성렬(Han, Seong-Ryeol) 한국산학기술학회 2013 한국산학기술학회논문지 Vol.14 No.10

플라스틱 사출성형은 원재료를 한 번의 가공으로 최종 제품을 만들 수 있는 장점을 가지고 있다. 사출성형 을 위해서는 금형의 설치, 플라스틱 수지의 용융, 용융수지의 사출, 성형품의 취출 등을 위하여 사출성형기는 반드시 필요하다. 사출성형기는 여러 가지 방법으로 구분되는데, 본 연구는 현재 국내 A사에서 생산되고 있는 토글식 사출 성형기를 대상으로 한다. 연구내용으로는 사출성형기의 여러 부품 및 주요한 플레이트에 대하여 3차원 모델링을 실 시하고, 3차원 캐드상에서 조립하여 사출성형기의 전체 구조를 파악하였다. 그리고 에너지 및 생산비 절감을 위하여 주요 플레이트에 대하여 유한요소법을 이용하여 사출압력과 형체력 적용시의 플레이트에 발생하는 스트레스와 변위 를 분석하고, 그 결과를 토대로 플레이트를 개선하였다. 개선된 플레이트를 대상으로 유한요소 재해석을 통하여 고정 플레이트는 약 2.7%, 이동 플레이트는 약 3.5%, 테일 스톡은 약 6.9%의 중량 감소 결과를 확인하였다. Nowadays, three-dimensional computer added design(3D CAD) tool are widely and actively used for design of mechanical machine. Because using the tool is more effective to understand design concept and to collaborate with other operation than using two-dimensional design tool. In this study, the 3D CAD tool which is called I-DEAS was applied for three-dimensional modeling of main parts and assembling of modeled parts for identification the entire shape of a injection molding machine. In addition, a study was also performed regarding reduction for the weight of main plates for saving production cost and energy in the machine. A finite element method(FEM) program in I-DEAS tool was used for the improvement study. First, the current main plates were structural analysed and then the plate deformations, weak regions and stress distributions were graped. By the FEM results, the 2nd improved designing of the plates was conducted such as reinforcement or slimming of the plate wall thickness. The 2nd structural FEM was performed for verification of the redesigned plates and then the FEM results were compared with the 1st FEM’s result. The weight of the main plates were averagely reduced approximately 3 - 7%. By these results, it was seemed that the improved plates have a useful availability.

유한요소법을 활용한 자동차용 브레이크 호스의 변형 모드 분석

한성렬(Seong-Ryeol Han) 한국기계가공학회 2013 한국기계가공학회지 Vol.12 No.3

Automotive brake system is an essential element for the safety. The system is powered by the circulation of brake oil. A braker hose is used for the circulation of the oil in this system. Layout of the hose changes according to the steering and stress occur in the hose. A lot of the durability tests are performed in order to prevent serious problems such as hose bursting by the accumulation of the stress before setting an optimized hose layout on automobile. The test is conducted for the layout which is same such as set in automobile. In the test, brake hose layout shall exercise the same mode of thousands of times under the high temperature and periodic pressure condition and then the damage of the tested hose is inspected. This test, however, has a disadvantage of heavy consumption of time and money. In order to compensate for these drawbacks, the finite element method(FEM) study was performed to predict the changes in the layout of the brake hose. In this study, the FEM results and the test results were compared and the validity was verified. The radius of curvature of the FEM and test at the same positions were especially investigated for the validation. Also, this study will be used as the basis of research on the life prediction of brake hose.

핫러너 금형에서 다수 캐비티 사이에 발생하는 충전불균형에 관한 연구

한성렬(Seong Ryeol Han),강철민(Chul Min Kang),한규택(Kyu Taek Han),정영득(Yeong Deug Jeong) Korean Society for Precision Engineering 2005 한국정밀공학회지 Vol.22 No.9

사출성형에 의한 열가소성 엘라스토머 성형품의 기계적 특성에 관한 연구

한성렬(Seong-Ryeol Han),최계광(Kye-Kwang Choi) 한국산학기술학회 2014 한국산학기술학회 학술대회 Vol.- No.-

열가소성 플라스틱과 열경화성 고무의 합성으로 만들어지는 엘라스토머는 자체의 특성 때문에 사용 이 점차 증가하고 있는 추세이다. 특히, 열가소성 플라스틱과 유사하여 사출성형 할 수도 있지만, 고무 의 특성을 동시에 가지고 있으므로 플라스틱 수지와 비교하여 훌륭한 탄성을 가진다. 이런 이유로 열 가소성 엘라스토머는 플라스틱 재료가 가진 기계적 특성과는 많은 차이가 있다. 그리고 고무와는 다르 게 플라스틱 수지처럼 재활용이 가능하기 때문에 고무를 대신하는 곳에 주로 사용된다. 본 논문에서는 열가소성 엘라스토머의 사출성형시 사출압, 보압, 성형온도와 같이 성형조건이 성형품의 인장강도 특 성에 미치는 영향을 연구하였다. 사출압과 성형온도가 증가하면 성형품의 인장강도가 증가하였고, 보 압의 증가는 성형품의 인장강도 향상에 거의 영향을 미치지 못하였다.

사출 금형 수축률 산정에 관한 연구

최광혁,한성렬,이춘규,Choi, Gwang-Hyeck,Han, Seong-Ryeol,Lee, Chun-Kyu 한국금형공학회 2016 한국금형공학회지 Vol.10 No.3

It is true that the plastic shrinkage is inevitable. Shrinkage rate in effect at the time of mold design will soon determine the size of the global product. Process for the shrinkage of the plastic that provides how made, yet it has identified a process for making the question whether the shrinkage that can be trusted, and by the experimental results were as follows: as shrinkage, see ISO but, according to circumstances the process can go to the agreement between the parties. shrinkage ratio of the pressure sensor installed in the specimen mold is essential, amount of pressure sensor is that it is appropriate approximately 2-3. proper holding pressure is a significant effect on shrinkage Mitch, so that the effect of selecting the contraction ratio data according to the appropriate holding pressure during mold making. shrinkage CAE analysis results are difficult to utilize in the mold-making chamber. Based on these results, it concluded by looking forward to the improved products produced shrinkage.

유리섬유 강화 플라스틱 노트북 커버의 전사성에 관한 연구

곽용수,한성렬,Kwak, Yong-Soo,Han, Seong-Ryeol 한국금형공학회 2016 한국금형공학회지 Vol.10 No.3

The purpose of this study is to build effective cooling circuit design in injection mold to improve glass fiber reinforced laptop computer cover plastics' transcription and gloss. Moldflow Insight and Ansys CFD CAE program used to verify efficiency and the experiment mold is precision machined and brazing soldered to make three-dimension cooling channel. The temperature of mold in injection test are fixed to $80^{\circ}C$ and $160^{\circ}C$. The result of this experiment is the improved surface quality of plastics with 85% improvement of transcription in high temperature mold.