• Title, Summary, Keyword: 이중사출성형 금형

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Determination of Molding Conditions of Double-Shot Injection Mold for the Computer Mouse via Three-Dimensional Injection Molding Analysis (3 차원 사출성형 해석을 통한 컴퓨터 마우스 제작용 이중사출성형 금형의 공정조건 결정)

  • Ahn, Dong-Gyu;Park, Min-Woo;Park, Jeong-Woo;Kim, Hyung-Su
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.35 no.12
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    • pp.1619-1625
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    • 2011
  • The objective of this study determine the molding conditions of a double-shot injection mold for fabricating a computer mouse using different materials, by performing three-dimensional injection molding analysis. In order to select the optical injection molding conditions, the effects of the injection time, the maximum injection pressure, the effect of packing time on the injection molding characteristics, and the product qualities were quantitatively examined. From the results of the injection molding analysis, the optimal injection molding conditions of the double-shot injection mold, which leads the molded product to the minimized shrinkage and deflection, were estimated. The results of the injection molding experiments, showed that an appropriate computer mouse can be fabricated using different materials when the identified optimal injection molding conditions are adopted.

Optimization of Injection Mold Fluidic System for the Square-type Cosmetic Case by Injection Molding Analysis Method (사출성형해석을 통한 화장품 사각 외장케이스 금형 유동시스템 구조 최적화)

  • Yoon, Gil-Sang;Kim, Gun-Hee;Lee, Jeong-Won;Sohn, Jong-In;Seo, Tae-Il;Kim, Yoo-Jin;Lee, Jung-Bae
    • Proceedings of the KAIS Fall Conference
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    • pp.514-517
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    • 2011
  • 본 연구에서는 사각형태 화장품 케이스 사출성형 시 발생되었던 수지 미성형 불량을 해결하기 위하여 사출성형해석 기술을 통해 성형품 형상변경 및 사출금형 내 유동 시스템 수정방안 도출을 수행하였다. 대상제품인 사각형태 화장품 케이스는 상측부 케이스로서 케이스 외관에 게이트 및 취출흔적이 남지 않아야 함에 따라 측면부 게이트 적용으로 유동거리가 길어져 미성형 불량이 다수 발생하는 제품이다. 따라서, 수지 유동성 향상과 더불어 효율적인 보압전달을 통하여 수지 충전 및 변형발생 저감을 위하여 성형품 형상변화 및 유동시스템 변화에 따른 사출성형해석을 수행하고 결과를 고찰하였다. 이로써 최종적으로 수지 미충전으로 인한 미성형 불량을 제거하고 성형품 변형을 줄일 수 있는 수지유동시스템 수정방안을 제시하였다.

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Determined Car Door Latch Injection Molding Process Conditions through the Finite Elements Analysis (유한요소 해석을 통한 차량용 도어 래치 사출성형 공정조건 결정)

  • Lee, Jung-Hyun;Lee, Seon-Bong
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.17 no.10
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    • pp.499-508
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    • 2016
  • Injection molding is a method for manufacturing many products, wherein a plasticized resin is injected into a mold at high pressure and hardened. According to the method, the product can be manufactured into various forms, and the mass production of up to tens of thousands of products is possible. The purpose of this study was to determine the process conditions for manufacturing a door latch for automobiles, through an analysis of the injection molding method. To calculate an appropriate injection flow for injection molding, a primary analysis for comparing the injection time, pressure, flow pattern, consolidation range, shear stress, shear rate, and weld line, as well as a secondary analysis for determining the conditions for stabilizing the molding temperature, holding pressure, and cooling process, were conducted. The characteristics of injection molding, and their influence on the product quality are discussed. No weld line and pores were observed on the products that had been manufactured based on the process conditions determined above. In addition, there were no flaws regarding the deformation compared to the prototype. Therefore, the manufacture of a product under the conditions determined in this study can reduce the defect rate compared to the existing production, and the process is also more competitive due to reduced production time.

A Study on the Design of Cooling Channels of Injection Mould to Manufacture a Flat Part with a Partly Thick Volume (부분적으로 후육부를 가지는 평판형 제품의 제작을 위한 사출성형 금형의 냉각채널 설계에 관한 연구)

  • Ahn, Dong-Gyu;Park, Min-Woo;Kim, Hyung-Soo
    • Journal of the Korean Society for Precision Engineering
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    • v.29 no.8
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    • pp.824-833
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    • 2012
  • The shrinkage and the warpage of the moulded part are influenced by the design of the product and injection mould. In a flat part with a partly thick volume, the warpage of the flat part is created from the difference of the shrinkage between thin and thick regions. The warpage of the flat part with a partly thick volume can be reduced by a proper design of the cooling system in the injection mould. The goal of this paper is to design properly cooling channels of injection mould to manufacture a flat part with a partly thick volume. The conformal cooling channel is adopted to improve cooling characteristics of a region with the thick volume. The linear cooling channels are assigned to the other region. The proper design of the conformal cooling channels is obtained from three-dimensional injection molding analysis for various design alternatives. The moulding characteristics of the designed mould with both conformal and linear cooling channels are compared to those of the mould with linear cooling channels from viewpoints of temperature, shrinkage and warpage of the moulded part using numerical analysis. Injection mould with both conformal and linear cooling channels for the flat part with a partially thick volume is fabricated. In addition, injection moulding experiments are performed using the fabricated mould. From the results of the injection moulding experiments, it has been shown that the designed mould can successfully fabricate the flat part with a partially thick volume.

Development of double injection mold for fuel-tube holder (자동차 연료튜브 홀더용 이중사출 금형·성형기술)

  • Kim, Gun-Hee;Yoon, Gil-Sang;Heo, Young-Moo;Jung, Woo-Chul;Shin, Kwang-Ho
    • Journal of the Korea Society of Die & Mold Engineering
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    • v.1 no.1
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    • pp.1-5
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    • 2007
  • Double injection molding process is very efficient molding-method for molding the products which is consist of multi-materials. Fuel-tube holder which is necessary for automobil power train and circulation systems is composed of plastic and rubber materials to minimize the vibration and pulsation noises. In existing process, fuel-tube holder was made by the insert molding process or assembly process after molding. If fuel-tube holder is manufactured by double injection molding process, it may be realize to improve the product quality, efficiency of molding-process and retrenchment of manufacturing cost. In this study, for manufacturing fuel-tube holder by double injection molding process, the analysis of joining characteristics between PA6(polyamide 6) and TPE(thermoplastic elastomer) was executed and the double injectin mold for molding fuel-tube holder with core toggle mechanism was fabricated. Finally, fuel-tube holder was molding using fabricated double injection mold.

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Hinge Design and Injection Molding Simulation of Cosmetic Cushion Fact Container Using Eco-Friendly Materials (친환경 소재를 이용한 화장품 쿠션 팩트 용기의 힌지 설계와 사출 성형 시뮬레이션)

  • Jung, Sung-Taek;Kim, Hyun-Jeong;Wi, Eun-Chan;Kim, Min-Su;Lee, Joong-Bae;Baek, Seung-Yub
    • Journal of the Korea Society of Die & Mold Engineering
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    • v.13 no.3
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    • pp.35-40
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    • 2019
  • As the consumer market in the cosmetic, vehicle manufacturing and aerospace industries grows, the demand for manufacturing industries using on injection mold technology. Also, such manufacturing technology of metal machining is expensive, and the shape is limited. Cosmetic cushion fact products are divided into outer relevant to the exterior of the product and inner containers containing the actual contents. In the case of the inner container, it needs to be combined with the upper and lower cases. As environmental regulations are strengthened internationally, the use of a large number of component parts can result in significant losses in recycling and economics. Therefore, this study aims to perform injection molding analysis through injection molding simulation to develop a cushion fact container that can be recycled through the unification of products and materials using polypropylene to cope with environmental regulations. In the case of injection molding conditions, Injection Time(sec): 4.5, Cooling Time(sec): 13, Resin Temperature($^{\circ}C$): 240, and Pressure(MPa): 30 were determined. The results of injection molding simulation according to the two design methods were compared with the sync mark which shows the problem of filling and injection molding.

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