• Title/Summary/Keyword: Die and Mold

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A study on the springback analysis of a curve monitor using a 3D scanner (3D 스캐너를 이용한 커브드 모니터의 스프링백 분석 연구)

  • Yoon, Hyoung-Woo;Lee, Chun-Kyu
    • Design & Manufacturing
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    • v.12 no.3
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    • pp.13-18
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    • 2018
  • Flexible display tends to grow every year, It tends to be larger, slimmer, and higher in image quality. Therefore, accuracy is required in the manufacturing process of each part. In the curved monitor, the bottom chassis has a structure to which other parts can be attached. The accuracy of the curvature which the bottom chassis of the curve monitor monitors has is important. If the curvature error is large, serious defects such as cracks, warpage, twisting and the like occur. Curvature was analyzed using 3D scanner. In the Forming process and Restriking process steps, spring go occurred, and spring back occurred in the Notching process and Bending process steps. Even in the same process, it was confirmed that the curvature value varied depending on the formed shape.

Research on the Mold Design of Motor Housing using Die Casting Process (다이캐스팅에 의한 모터 하우징의 금형설계에 관한 연구)

  • Han, Kyu-Taek
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.14 no.5
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    • pp.36-41
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    • 2015
  • In this paper, research on the mold design of motor housing produced by the HPDC process was conducted using computer simulations and experiments. Recently, automobile parts have been required to be light and have high strength. The die casting process was used to manufacture automotive motor housings. In the die casting process, the control of casting defects is very important. However, it has usually depended on the experience of the foundry engineer. For the analysis of the manufacturing process of motor housing, the finite element method is applied. Through the simulations using commercial software, the filling pattern and product defects could be confirmed. The analysis results obtained from the filling behavior of the casting process agreed with the experimental results. The computer simulation results of filling behavior were reflected in the optimal mold design of motor housing.

A study on the motorcycle lear cowl injection molding by CAE analysis (CAE 해석을 이용한 오토바이 리어카울 사출성형에 관한 연구)

  • Sung, Si-Myung;Jung, Sang-Jun
    • Design & Manufacturing
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    • v.13 no.4
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    • pp.34-39
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    • 2019
  • In this paper, in order to improve the formability and quality of the injection molded parts in the molds for molding the motorcycle rear cowl injection molded parts with different volumes at the same time, the flow of the molded parts is changed through the injection molding CAE analysis by changing the gate position, runner size and position. It is to find the optimum gate position, the diameter of the runner and the position where the balance is equal. The molded article formed by the optimization resulted in the uniformity of the molten resin at the same time at the corner of the product, thereby maintaining the flow balance favorable for mass production at lower injection pressure.

A study on torsion correction of corner fixing bracket for large display frame (대형 디스플레이용 플레임의 코너 고정용 브라켓의 뒤틀림 보정에 관한 연구)

  • Kim, Byung-Joo;Yun, Jae-Woong
    • Design & Manufacturing
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    • v.12 no.3
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    • pp.31-35
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    • 2018
  • In this paper, the method of improving the flatness and perpendicularity for a corner fixing bracket of the large display frame is studied through experiments. Three specimens were tested, one specimen not subjected to bending line before bending, and two specimens with a straight groove with 0.2 mm and 0.5 mm depth. Experimental results show that the flatness of bracket becomes worse with deeper depth. When there is no straight groove, the perpendicularity becomes worse. For the flatness correction, a restriking process was added. The twist of bracket was corrected by performing the restriking with a curvature larger than the twist amount in the direction opposite to the deformed direction. We also found that the perpendicularity is maintained regardless of the amount of curvature with the restriking process.

A study on the embossing Height displacement of high speed press bottom point accordance (High Speed Press 하사점 변화에 따른 엠보싱 높이 변화 연구)

  • Kim, Seung-Soo;Kim, Sei-Whan;Lee, Chun-Kyu
    • Design & Manufacturing
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    • v.10 no.2
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    • pp.29-33
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    • 2016
  • Production machines have been more important, due to quality level of vehicle motor core is getting higher. That is why, to improve assembly fit of tooling and to be emphasized how much moving down caused of deterioration of high speed press, it is also getting more important parts as solution of problems. To analyze how much move based on condition of movement as tooling and high speed press, and to measure how much impact to embossing height caused of changing movement down. As the result of investigation, in case of material thickness 0.5mm, there is highest pull and force power when emboss height is 0.45mm. If emboss height is less than 0.45mm, pull and force power is getting lower, if emboss height is higher than 0.45mm, it is impossible to make it forming caused of changed press movement, also it has been piercing.

Study on extending the Die life of the mold in manufacturing wire cut electric discharge machined punches and die plates (와이어 컷 방전 가공한 펀치와 다이플레이트 제작에서의 수명연장에 관한 연구)

  • Kim Sei-Hwan;Chio Kye-Kwang
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.7 no.4
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    • pp.545-549
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    • 2006
  • W-EDM is generally used to manufacture punches and die plates from among press mold parts. Before W-EDM was used, however, punches and die plates manufactured via mechanical processing were used to manufacture products, with the die life of the mold expiring after 2,000,000~2,300,000 products have been manufactured. When the mold manufactured through W-EDM was used, however, its service life expired only after 700,000~800,000 products have been manufactured. Since this was attributed to the deformed layer formed after using W-EDM, the surfaces before and after W-EDM was used were scanned using SEM to verify the occurrence of such layer. This study sought to come up with a method of eliminating such phenomenon.

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A study on the optimum molding of plastic pulley using numerical analysis (수치해석을 이용한 플라스틱 풀리 성형품의 최적 성형에 관한 연구)

  • Kim, Kyung-A;Han, Seong-Ryeol
    • Design & Manufacturing
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    • v.14 no.1
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    • pp.30-35
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    • 2020
  • Plastic pulleys used for the purpose of power transmission have to very high roundness characteristics. The roundness of plastic pulleys is influenced by many factors. In this study, the effect of molding conditions on the roundness of pulleys was analyzed using a numerical analysis program. To improve the roundness, molding conditions that minimize the amount of deformation of the pulley were studied through an experimental design method. Among the experimental design methods, the Taguchi method was used, and the main molding conditions affecting the deformation of the pulley were the resin temperature and the holding pressure. It was found that the amount of deformation is reduced by about 2.86% when molding with the optimum molding conditions compared to when the optimum molding conditions are not applied.

A study on structural improvement in multi-cavity mold for ham can lids (햄 뚜껑 금형의 다수 캐비티 금형구조 개선에 관한 연구)

  • Lee, Eun-jong;Choi, Kye-kwang;Kim, Sei-hwan
    • Design & Manufacturing
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    • v.7 no.1
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    • pp.40-44
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    • 2013
  • My company develops, manufactures injection mold and produces thin-walled cosmetics and food containers. Without high quality and low production cost, it is hard to compete in the market. To be competitive, a company has to utilize mold with as many cavities as possible to lower manufacturing cost. Eject plate abrasion and deformation cut down mold lifespan, troubles during injection lower productivity and foreign substances in molds cause abrasion. This study focuses on how to improve mold life and productivity, and to slow down mold abrasion.

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A study on the analysis of terminal die and progressive die manufacture (단자 금형의 해석 및 프로그레시브 금형제작에 관한 연구)

  • Kim, Dong-Wook;Choi, Young-Rock;Kim, Sei-Hwan;Choi, Kyu-Kwang
    • Design & Manufacturing
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    • v.9 no.3
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    • pp.41-44
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    • 2015
  • The progressive die is processing methods that can improve the productivity for sequentially transferring while continuously producing in multiple processes. In this study was carried out the die analysis through the load analysis acting on the terminal die and sheet metal forming also the study was carried out with respect to optimized die design for the terminal die and progressive die manufacturing using the CimatronE Die Design.

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Reverse engineering of concentric plug cover by 3D scanning and development of injection mold (3D 스캔을 이용한 콘센트 커버의 역설계 및 금형 개발)

  • Kim, Dong-Wook;Choi, Young-Rock;Shin, Sang-Eun;Kim, Sei-Hwan;Choi, Kyu-Kwang;Han, Seong-Ryeol
    • Design & Manufacturing
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    • v.9 no.1
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    • pp.18-22
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    • 2015
  • Mold making and product manufacturing process was made by a die through a number of stages. Thereby, it takes a long period of time from the manufacture of mold until passed the products to consumers. However, it is not possible to meet the diverse desires purchasing of consumer. We made a 3D CAD Model aligned with product scan data using reverse engineering. Utilizing thereafter flow analysis to derive the optimal mold conditions, by applying the condition, and devised a mold fabrication process that is much shorter than the conventional process for fabricating a mold. In this study, the outlet cover to the product, it describes a process, as a result, it was confirmed that the number of steps can be shortened much more than the conventional process.

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