• 제목/요약/키워드: Hydraulic injection molding machine

검색결과 16건 처리시간 0.021초

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

  • 윤홍식;김성동
    • 드라이브 ㆍ 컨트롤
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    • 제17권3호
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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%.

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

  • 신성철;박영진;김진영;이강걸
    • 한국시뮬레이션학회논문지
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    • 제11권4호
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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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고효율 사출성형기의 에너지 절감 및 성형 재현성 연구 (The Energy Saving and the Reproducibility of Highly-Efficient Injection Molding Machine)

  • 황철진;김종선;정철;안희정;허영무;김종덕;윤경환
    • 소성∙가공
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    • 제17권8호
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    • pp.662-667
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    • 2008
  • Because of steep rise of international energy cost in recent years, high efficiency has been emphasized in energy policy. As far as injection molding machine is concerned, hybrid method using hydraulic and electric systems became the key to this energy saving. The energy saving and molding reproducibility of hybrid injection molding process were shown experimentally. The power consumption of hybrid injection molding machine is reduced to 38% as compared with that of hydraulic machine. Furthermore, the molding reproducibility was shown for both methods.

고효율 사출성형기의 에너지 절감 및 성형 재현성 연구 (A Study on the Energy Saving and the Reproducibility of highly-efficient Injection Molding Machine)

  • 정철;김종선;안희정;윤경환;황철진
    • 한국소성가공학회:학술대회논문집
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    • 한국소성가공학회 2008년도 추계학술대회 논문집
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    • pp.418-421
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    • 2008
  • Because of steep rise of international energy cost in recent years high efficiency has been emphasized in energy policy. As far as injection molding machine is concerned, hybrid method using hydraulic and electric systems became the key to this energy saving. the energy saving and molding reproducibility of hybrid injection molding process were shown experimentally, power consumption of hybrid machine is 38% as compared with that of hydraulic machine. Furthermore, the molding reproducibility showed between two methods.

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사출성형기의 제어방식에 따른 사출장치 정밀도 검사 (Injection Unit Precision Inspection according to Control Method of Injection Molding Machine)

  • 정현석;유중학
    • 한국산학기술학회논문지
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    • 제17권4호
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    • pp.414-419
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    • 2016
  • 본 연구는 사출 성형기의 제어 방법에 따른 정밀 검사에 대한 연구를 수행하였다. 실험을 통하여, 유압사출 성형기와 전동식 사출성형기의 스크루 스트로크, 보압, 용융 수지온도에 대하여 정밀도에 미치는 영향을 조사하였다. 또한, 실험에서 얻어진 데이터 편차에 대한 가설 테스트를 수행 하였다. 연구를 통하여 스크루 스트로크, 용융 수지온도, 보압 순으로 편차가 크게 발생하는 것을 알 수 있었다. 유압식 사출성형기가 전동식 사출성형기에 비해 제품 간의 산포가 크게 발생하는 것을 확인하였다. 또한 통계프로그램인 미니탭을 활용하여 스크루 스트로크, 용융 수지온도, 보압에 대한 가설을 설립 한 후 P값을 확인하여 스크루 스트로크, 용융수지온도는 귀무가설($H_0$)을 채택하였으며, 보압은 상호차이가 발생한 대립가설($H_1$)을 채택하였다.

초박형(0.3t) 도광판 적용을 위한 유압식 고속사출성형의 성형 안정성 연구 (A study on the Molding Stability of Hydro-mechanical High Speed Injection Molding for Thin-Walled(0.3mm) LGP)

  • 김종선;오정길;정철;안희정;황철진;김종덕;윤경환
    • 한국소성가공학회:학술대회논문집
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    • 한국소성가공학회 2008년도 추계학술대회 논문집
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    • pp.422-425
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    • 2008
  • Recently, electronic products and related parts are required to have thin thickness because of small form factor. To go with the trend, LGP(light guide plate) of LCD BLU(Liquid Crystal Display Back light unit: It is one of kernel parts of LCD) for cell phone has the thickness of 0.3 mm and the battery case of cell phone has 0.25 mm. Accordingly, high speed injection molding is required to make products which have thin thickness. High speed injection molding means that the resin is injected into the cavity at higher than normal speed avoiding short shot. In the case of hydro-mechanical high speed injection machine, it requires the design for hydraulic unit to make high injection speed and the design for control unit to control hydraulic unit. In the present paper, we concentrated on the molding stability of hydro-mechanical high speed injection machine to make an LGP of 0.3 mm thickness.

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사출성형기의 속도제어 방식에 따른 형개거리에 관한 연구 (A study on the mold opening stroke according to the control method of the injection molding machine)

  • 정현석;이춘규
    • Design & Manufacturing
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    • 제15권3호
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    • pp.56-61
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    • 2021
  • The increase in automation facilities in the injection molding industry is a very important process control item. The most important item when constructing an unmanned machine using a take-out robot is the "mold opening stroke" of the mold. The injection molding machine control method is divided into hydraulic type and electric type, and there have been few studies on the mold opening distance according to the control method. In this study, the correlation was confirmed by increasing the injection speed to 20, 50, 80, and 100% for the three types of hydraulic control method, open loop and close loop, and electric control method. Through the experiment, the following results were obtained. (1) It can be seen that the reproducibility is excellent with the electric, close loop, and open loop control methods. (2) When the injection speed is set to 50%, the mold opening distance is 263.10~263.27 mm, which is the most reproducible. (3) As a result of ANOVA, both injection speed and mold opening distance showed a significant difference in the hydraulic control method (p<0.05), but it was verified through experiments that there was no significant difference in the electric control method. Based on these results, when electric control is selected rather than hydraulic control, the reproducibility of the mold opening distance is excellent, so it is thought that the taking-out robot can take the object out of the mold more safely.

박판(0.3mm) 도광판 성형을 위한 유압식 고속사출성형의 성형 안정성 연구 (Molding Stability of Hydro-Mechanical High Speed Injection Molding for Thin-Wall(0.3mm) LGP)

  • 황철진;김종선;오정길;정철;안희정;허영무;김종덕;윤경환
    • 소성∙가공
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    • 제17권8호
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    • pp.657-661
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    • 2008
  • Recently, products of electronic industry and related parts are required to have the thickness thinner and thinner to reduce the part weight. To go with this trend, LGP(light guide plate) of LCD-BLU(Liquid Crystal Display-Back Light Unit: It is one of kernel parts of LCD) for cell phone has the thickness of ${\sim}0.3mm$ and the battery case of cell phone has ${\sim}0.25mm$. Accordingly, high speed injection molding is required to mold products which have thinner parts. To achieve high speed injection and proper control of hydraulic unit, various design was applied to conventional injection unit. In the present paper, we concentrated on the molding stability of hydro-mechanical high speed injection machine to make an LGP of 0.3mm thickness.

CFRTP 부품제조를 위한 금형 및 성형 기술에 대한 연구 (A Study of Mold Technology for Manufacturing of CFRTP Parts)

  • 정의철;김종선;손정언;윤경환;이성희
    • Design & Manufacturing
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    • 제11권3호
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    • pp.25-28
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    • 2017
  • The production of carbon fiber reinforced thermoplastics(CFRTP) parts using an injection/compression molding process that differs from the conventionally used fabrication methods was investigated Before the application of composite molding in the injection/compression molding process, a simple compression molding experiment was performed using a hydraulic press machine to determine the characteristics of resin impregnation and to obtain a basic physical property data for the CFRTP. Based on these results, injection/compression molded specimens were manufactured and an additional insert/over molding process was applied to improve the impregnation rate of the molded specimens. The results demonstrated that the tensile strength of the molded parts using the faster injection/compression process was similar to that of a hydraulic press molded product.

유압회로를 기반으로 한 사출성형기의 해석모델 개발 및 공정 별 특성검토 (Development of Injection Molding Machine Simulation Model Based on Hydraulic Circuit, and Operating Characteristic Examination)

  • 노대경;장주섭;어승룡
    • 한국자동차공학회논문집
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    • 제22권2호
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    • pp.7-16
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    • 2014
  • Vehicle industry is developing research for producing high quality injection molded product. The main objective of this study is providing information about hydraulic system for researchers who are involved in the other fields, not hydraulic field. Another objective is developing hydraulic circuit simulation model which analyzes the cause of several destabilizing elements related to quality of injection molded products. Injection molded product consists of a lot of hydraulic parts, and there are many nonlinear facts for dynamic behavior. So, we used 'SimulationX' which is specialized in hydraulic system for developing simulation model.