• 한국정밀공학회:학술대회논문집
• /
• 한국정밀공학회 2004년도 추계학술대회 논문집
• /
• pp.580-584
• /
• 2004

In the present study, an evaluation technology for heating channel layout was investigated in SMC molding system design. Conventional design rules of cooling channel in injection molding process were applied to the present work. Finite element thermal analysis with ANSYSTM was performed to evaluate the temperature distribution of mold surface. SMC mold was manufactured to test the effect of a proposed heating channel layout system on the temperature distribution of mold surface and infrared camera was applied to a measurement of temperature. It was shown that infrared camera application was possible in a measurement of temperature distribution on mold surface.

• 한국산학기술학회논문지
• /
• 제2권2호
• /
• pp.101-106
• /
• 2001

사출성형 제품 및 금형설계를 위한 통합형 CAD시스템이 연구되었다. 현존하는 CAD시스템은 주로 기하학적 모델링 기능만을 제공하고 있으나 본 연구에서는 제품설계, 금형설계, 몰드베이스 선정, 공정설계를 통합하여 설계할 수 있도록 CAD/CAPP/CAE를 연계한 설계시스템을 구성하였다. 특징형상 기법을 비롯하여 다양한 방법론이 시스템 구성을 위해 연구되었다. 이러한 통한형 설계시스템은 동시설계를 위해 유용하게 사용될 수 있는 진전된 개념의 설계시스템이다.

• Design & Manufacturing
• /
• 제2권5호
• /
• pp.11-15
• /
• 2008

A micro-injection mold for ultra-thin-walled plate was considered in this work. The proposed mold system is for the fabrication of ultra-thin walled plastic plate with micro features by injection molding. As the injection molding of thin-walled plastic, which has the thickness under $400{\mu}m$, itself is not easy, the injection molding of the micro-features in the thin-walled structure is more complicated and difficult. To investigate the basic phenomenon of the ultra-thin walled part during the injection molding process, design of the part and mold system were performed in the present study. The injection molding and structural analysis of the suggested part and mold system were also performed. Consequently, injection molding system for ultra-thin walled plate with micro features were manufactured and presented.

• 대한기계학회논문집
• /
• 제12권6호
• /
• pp.1227-1237
• /
• 1988

본 연구에서는 Fig.1은 본 시스템이 제품의 형상을 모델링하고 그것으로부터 어떻게 금형을 설계하는 지를 설명해주고 있다. 본 연구의 범위는 Fig.1의 점선에 의해 둘러 싸인 부분이다. 즉 본 시스템의 모델링 기능을 사용하여 생성시킨 최종제 품 형상으로부터 적당한 몰드 베이스와 그에 장착되는 금형판을 설계 생성시키는 작업 이다.수지의 유동 해석과 NC공구 경로의 계산은 개발 중에 있으며 이들과 함께 통 합되면 완전한 CAD/CAM 시스템을 Fig.1에서와 같이 구축할 수 있다.

• 한국정밀공학회지
• /
• 제24권11호
• /
• pp.84-90
• /
• 2007

In this study, design and manufacturing of plastic injection mold with cavity pressure/temperature sensors were performed fur tensile test specimen. International standard system for plastic tensile specimen was applied to design an injection molding system. Cavity pressure and temperature sensors were placed on the side of fixed platen of the injection mold to prevent them from external impact damage. Injection molding experiments with variations of injection speed and melt temperature were performed and then tensile test of the manufactured polycarbonate specimens was also performed. It was shown that injection molding processing parameters can have effect on the mechanical properties of the plastic injection molded part.

• 한국시뮬레이션학회논문지
• /
• 제11권4호
• /
• pp.25-32
• /
• 2002

Hydraulic systems of injection molding machine are modelled and simulated with AMESim which is a commercial program. Detail models of hydraulic components are simulated and simulation results are evaluated with maker's test results in catalog. Sub system models which is divided according to functional operation are made and its analysis results shows how design parameters work on operational characteristics like cylinder speed, cylinder displacement, pressure, flow rates at each node and so on. Total circuit model is also made and analyzed. The prediction made by simulation will be used design of hydraulic systems of injection molding machine.

• 드라이브 ㆍ 컨트롤
• /
• 제13권2호
• /
• pp.51-58
• /
• 2016

The present study deals with the issue of clamping force control of an injection molding machine using 2-way cartridge valve based logic circuit. The operating principle for the cartridge valve is described with its construction and static opening behavior. Basic module circuits are designed first and analysed according to the basic functions. Then they are combined with a virtual design model for the clamping mechanism to simulate the control performance of the overall system. The backlash inherent in the mechanism is considered while evaluating the time-delay in the process of clamping force build-up. The effects of a couple of design parameters in backlash, i.e., interval and stiffness have been demonstrated in the time-domain.

• 한국기계가공학회지
• /
• 제13권4호
• /
• pp.50-55
• /
• 2014

Currently, flat cover glasses are widely applied to mobile devices. However, for a good design and for convenience of use, curved cover glasses are in demand. Thus, many companies are attempting to produce curved cover glasses using a shaving technique, but the production efficiency is very low. Therefore, a molding technique has been adopted to increase the efficiency of curved glass production systems. For a glass molding system, a uniform temperature distribution of the mold is crucial to produce high-quality curved cover glasses. Before setting the heating conditions of the molding system for a uniform temperature distribution by a thermal analysis, verification is required. Therefore, in this study, temperature measurements were conducted for a prototype molding system and the experimental results were compared with simulation computations. The temperatures of the heating block surface were in good agreement with the computational results for transient and steady conditions.

• 대한기계학회논문집A
• /
• 제27권6호
• /
• pp.1020-1027
• /
• 2003

A traditional mold design has been conducted by an experience-based trial and error, whereby the mold designer would decide the gate locations and processing conditions based on the caring characteristics and its functional requirements. The paper suggests an optimal gate location and processing conditions in the injection molding using a global search method referred to as micro genetic algorithm( ${\mu}$ GA). ${\mu}$ GA yields the optimal solution with a small size of population without respect to design variables for saving time that is needed to calculate the fitness of many individuals. Due to the reason, the paper uses a commercial analysis package of injection molding(CAPA) to analysis a state of flux. In addition to that, axiomatic approach .is applied in the beginning of design. It is a useful method to draw a well-organized and reasonable idea to handle a problem.

• Design & Manufacturing
• /
• 제15권1호
• /
• pp.1-7
• /
• 2021

The position of the gate is one of the important factors for optimal injection molding. This is because inappropriate gate positions cannot fill the cavity uniformly, which can lead to defects such as contraction. In this study, CAE was performed on hot runner injection molding of the washing machine base and plasticity was compared by changing gate position from existing gate position. A total of two alternatives have been applied to compare the plasticity of the washing machine base according to its optimal gate position. The gate position of the improved molds and the gate position of the current mold is analyzed by injection molding analysis. The results of the fill time, the pressure at V/P switchover, clamping force, and deflection were compared. In washing machine base injection molding, the deflection was reduced by about 3.76% in the improved mold 2. In improved mold 1, the fill time during injection molding was reduced by 3.32% to enable uniform charging, and the clamping force was reduced by 31.24%. We have confirmed that the position of the gate can change the charging pressure and the clamping force and affect the quality and cost savings of the molded product.