• Title/Summary/Keyword: Injection Molding Machine

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Fault Detection and Diagnosis based on Fuzzy Algorithm in the Injection Molding Machine Barrel Temperature (사출 성형기 Barrel 온도에 관한 퍼지알고리즘 기반의 고장 검출 및 진단)

  • 김훈모
    • Journal of Institute of Control, Robotics and Systems
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    • v.9 no.11
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    • pp.958-962
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    • 2003
  • We acquired data of injection molding machine in operation and stored the data in database. We acquired the data of injection molding machine for fault detection and diagnosis (FDD) continuously and estimated the fault results with a fuzzy algorithm. Many of FDD are applied to a huge system, nuclear power plant and a computer numerical control(CNC) machine for processing machinery. But, the research of FDD is rare in injection molding machine compare with computer numerical control machine. We appraise the accuracy of the FDD and the limit of the application to the injection molding machine. We construct the fault detection and diagnosis system based on fuzzy algorithm in the injection molding machine. Data of operating injection molding machine are acquired in order to improve the reliability of detection and diagnosis.

A Study on Cycle Time and Power Saving Effect of a Hydraulic Hybrid Injection Molding Machine using a Servo Motor (서보모터를 이용한 유압 하이브리드식 사출성형기의 공정시간 및 절전효과에 관한 연구)

  • Yun, Hongsik;Kim, Sungdong
    • Journal of Drive and Control
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    • v.17 no.3
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    • pp.15-25
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    • 2020
  • The cycle time and power saving effect of a hydraulic hybrid injection molding machine using a servo motor are considered in this paper. In order to verify control characteristics, such as pressure and speed, experiments were performed with the hydraulic hybrid injection molding machine, clamping force of 110 ton. The power consumption and production cycle time of a conventional hydraulic injection molding machine were measured to compare its performances with the hydraulic hybrid injection molding machine. An injection molding machine with a clamping force of 1300 ton was used as the conventional machine, the hybrid machine was implemented by replacing its induction motors with servo motors. In the remodeled hybrid machine, experiments were performed to investigate how the displacement of the mold clamping pump affects the power consumption and production cycle time. The results showed that the production cycle time of the hybrid injection molding is similar to a conventional hydraulic injection molding machine but with a significant energy saving of about 40%.

Characteristics Analysis of the Fluid Power System for a Double-color Injection Molding Machine Development (이색 사출성형기 개발을 위한 유압시스템의 특성 검토)

  • Jang, J.S.
    • Transactions of The Korea Fluid Power Systems Society
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    • v.8 no.4
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    • pp.24-31
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    • 2011
  • Double-color Injection molding machine is the assembly of many kinds of mechanical, fluid power part and electric electronic control system. From in these, fluid power is a part where becomes the first core of this machine. Fluid power systems of double-color injection molding machine are modelled and analyzed using a commercial program AMESim. Partial system models which is divided according to functional operation are made and its analysis results shows how design parameters work on operational characteristics like pressure, flow rates, displacement at each node and so on. Analysis modeling and compared the data which gets from experiment and the analysis result which has a reliability got data. The results made by analysis will be used design of fluid power circuit for developing a double-color injection molding machine.

Development of Analysis Model for Characteristics Study of Fluid Power Systems in Injection Molding Machine (사출성형기 유압시스템의 특성 검토를 위한 해석 모델 개발)

  • Jang, J.S.
    • Transactions of The Korea Fluid Power Systems Society
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    • v.8 no.4
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    • pp.1-8
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    • 2011
  • Injection molding machine is the assembly of many kinds of mechanical and fluid power part and electro-electronic control system. From in these, fluid power is a part where becomes the first core of this machine. Fluid power systems of injection molding machine are modelled and analyzed using a commercial program AMESim. The analysis model which is detailed about the parts applied a publishing catalog data. 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 displacement, pressure, flow rates at each node and so on. Total fluid power circuit model is also made and analyzed. The results made by analysis will be used design of fluid power circuit of injection molding machine.

Development of Micro Injection Molding Machine for Micro Parts (미소부품용 미세사출성형기 시작품 개발)

  • 제태진;신보성;최두선;이응숙;김영민;강신일
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • pp.337-341
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    • 2002
  • In these day, micro systems have gained attention with development of advance technologies. Researches about the fabrication of micro parts are actively made in the whole world. Among the researches, technology for micro injection molding machine is one of the key issues for fabrication of micro parts. In this study, we developed a micro injection molding machine for micro parts. To achieve this, injection unit was constructed using a screw with diameter of 12 mm. Clamping unit with clamping force of 1.75 kgf/$\textrm{cm}^2$ was constructed. Also verification test fur fabrication of micro parts was performed. It was performed that the micro injection molding machine can fabricate micro parts based on the result.

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Numerical Study on the Stress Safety of a Cylinder for an Injection Molding Machine (사출성형기용 실린더의 응력안전성에 관한 수치적 연구)

  • Kim, Chung-Kyun;Kim, Kyung-Seob
    • Journal of the Korean Society of Manufacturing Technology Engineers
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    • v.20 no.4
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    • pp.401-406
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    • 2011
  • This study presents the stress safety analysis of a cylinder, which is manufactured by a tempered ASTM D2, tempered SM45C and normalized SM45C materials, respectively. The inner diameter of three cylinder models are 85mm, 95mm, and 11 Omm and the total length of a cylinder is 2,365mm for a high pressure injection molding machine. The FEM computed results show that the inner diameter of 85mm with a thick thickness of 62.5mm may produce the injection pressure of 325MPa and the inner diameter of 110mm with 50mm thickness reduces up to the injection pressure of 220MPa because of a reduced thickness of a cylinder. These injection pressures are enough for a high pressure injection molding machine assembled by ASTM D2 cylinder. And also, an injection cylinder manufactured by a tempered SM45C material in which is low priee may produce 225MPa injection molding pressure and this may sufficiently endure stress safety compared to that of ASTM D2 cylinder material. Thus, this study recommends that tempered SM45C cylinder is appropriated for a mild injection molding machine as an alternative cylinder material when the safety strength and low prices are considered. But the normalized SM45C cylinder material does not meet a stress safety of yield strength in general.

Developement of Simulation Model for Analysis of Hydraulic Systems in Injection Molding Machine (1) (사출성형기 유압시스템 분석용 시뮬레이션 모델 개발 (1))

  • 신성철;박영진;김진영;이강걸
    • Journal of the Korea Society for Simulation
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    • v.11 no.4
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    • pp.25-32
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    • 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.

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A Study on Fuzzy Temperature Control for the Barrels of Injection Molding Machine using PC based PLC (PC 기반 PLC를 이용한 사출성형기 배럴의 퍼지 온도 제어에 관한 연구)

  • 김훈모
    • Journal of Institute of Control, Robotics and Systems
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    • v.9 no.10
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    • pp.768-773
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    • 2003
  • Injection molding has been widely used for the mass production of a plastic product. With the development of the relative technique, various injection molding techniques have been developed and we could get more precise plastic product. The temperature of a melting resin is an important factor in the injection molding and this temperature has direct influence on the quality of a plastic product. In the present injection molding machine, the deriation of a temperature controlled by PID control method is within 2$^{\circ}C$ in the injection molding machine but PID control method takes too much time to stabilize after preheating and its overshoot is so big. We applied fuzzy control to alleriate the problem. In this research, we experimented the fuzzy temperature control with the usage of PC based PLC.