• 제목/요약/키워드: Injection molding process

검색결과 903건 처리시간 0.028초

모듈형 퍼지-신경망을 이용한 미성형 사출제품의 최적 해결에 관한 연구 (A Study on Optimal Solution of Short Shot Using Modular Fuzzy Logic Based Neural Network (MENN))

  • 강성남;허용정;조현찬
    • 한국지능시스템학회논문지
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    • 제11권6호
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    • pp.465-469
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    • 2001
  • In injection molding short shot is one of the frequent and fatal defects. Experts of Injection molding usually adjust process conditions such as injection time, mold temperature, and melt temperature because it is most economic way in time and cost. However, it is difficult task to find appropriate process conditions for troubleshooting of short shot as injection molding process is a highly nonlinear system and process conditions are coupled. In this paper, a modular fuzzy neural network (MFNN) has been applied to injection molding process to shorten troubleshooting time of short shot. Based on melt temperature and fill time, a reasonable initial mo이 temperature is recommenced by the NFNN, and then the mold temperature is inputted to injection molding process. Depending on injection molding result, specifically the insufficient quantity of an injection molded part. and appropriate mold temperature is recommend repeatedly through the NFNN.

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LED TV 스피커 프레임용 사출 성형공정 구현에 관한 실험적 연구 (Experimental Study on implementation of injection molding process for speaker frame in LED TV)

  • 이선곤;김상현
    • 한국기계가공학회지
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    • 제12권5호
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    • pp.94-101
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    • 2013
  • Injection molding process is one of the most important methods to produce plastic parts with high efficiency and low cost. The objective of this study is to implement the best plastic injection molding process for LED TV speaker frame. Moldflow analysis and simulation of plastic injection molding process were carried out in order to predict optimal modeling operation conditions and then injection molded part was produced various type of resin temperature, filling time and injection pressure variation. the result was that the best injection molding condition is set as 60bar pressure, 2sec filling time and $310^{\circ}C$ degree. The study result would be useful to variety of plastic injection molding process.

자동차부품용 알루미늄인서트 사출성형공정 구현에 관한 연구 (A Study on Implementation of Al-Inserted Plastic Injection Molding Process for Automobile Interior-Parts)

  • 노태정;김경수
    • 한국정밀공학회지
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    • 제25권5호
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    • pp.43-51
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    • 2008
  • Generally a plastic injection molding is a manufacturing process used to produce the various parts of complicated shape at low cost. The objective of this study is to implement a new plastic injection molding process with inserted Aluminum sheet, which is highly durable, light and luminous. Moldflow analysis and simulation of plastic injection molding process with inserted Aluminum sheet were carried out in order to predict optimal molding operation conditions. The experimental results in the Al-inserted plastic injection molding process were compared with the simulation results by Moldflow. Durability and reliability test results for trial products were satisfied to adopt the Al-inserted plastic injection molding process developed as manufacturing of automobile interior parts.

충전과 보압과정이 사출성형공정에 미치는 영향에 관한 연구 (A Study on the Effects of Filling and Packing Phases on Injection Molding Process)

  • 김현필;김용조
    • 한국공작기계학회논문집
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    • 제11권4호
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    • pp.44-53
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    • 2002
  • Injection molding process factors such as molding temperature, injection pressure, flow rate and flow velocity, must be controlled properly in filling and packing phases in the injection molding process. In this study, effects of these factors on the injection molding were investigated through the flow analysis for the filling and packing phases. Molding troubles like flow mark weld line, sink ma가 short shot and warpage car be caused by these injection molding process factors. Among them the short shot was caused by the fact that the packing pressure could not reach properly to the filling end part in the packing phase and hence the flow rate could not be supplied to the full. In addition as the flow rate for the volumetric shrinkage during the f개zen phase could not be supplied Properly by the packing pressure, the short shot appeared. Here, the volumetric shrinkage reduced with increasing the packing pressure and also the warpage of molded part increased with increasing the packing Pressure.

마그네슘합금 사출성형의 기술적용에 관한 연구 (A Study of Technical Adapting on Injection Molding for Magnesium Alloy)

  • 강태호;김인관;최준영;김영수
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 1997년도 추계학술대회 논문집
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    • pp.833-836
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    • 1997
  • Magnesium alloys are one of light weight material. Strength and stiffness of Magnesium alloys are enough to use for commercial product. Demand for strong, lightweight parts several computer and electronics have driven much of Magnesium injection molding's growth so far. And it is eighth most abundant resource on earth. In electronic device, electromagnetic interface and electrostatic discharge can affect performance. Magnesium injection molding is similar to normal plastic injection molding process. But some process condition is different. Especially injection speed and process temperature are so differs from other injection molding system. It just start for make something. But Magnesium injection molding is one of best alternate process for producing metal alloy part.

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사출성형시 보압이 냉각시간에 미치는 영향 (Effects of holding pressure affecting cooling time in injection molding)

  • 문영배;최윤식;정영득
    • Design & Manufacturing
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    • 제2권1호
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    • pp.39-43
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    • 2008
  • There occur not only many problems in the injection process but also low quality productivity due to the injection conditions of various injection factors. Injection molding process factors such as molding temperature, injection pressure, flow rate and flow velocity, must be controlled properly in filling and packing phases in the injection molding process. In this study, effects of these factors on the injection molding were investigated through the flow analysis for the holding pressure affecting cooling time. Results of this study would be helpful to setting of holding pressure for optimization of forming condition in order to reduce cooling time in injection molding.

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

  • 김건희;윤길상;허영무;정우철;신광호
    • Design & Manufacturing
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    • 제1권1호
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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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퍼지-신경망을 이용한 미성형 사출제품의 최적해결에 관한 연구 (A Study on Optimal Solution of Short Shot Using Fuzzy Logic Based Neural Network(FNN))

  • Kang, Seong-Nam;Huh, Yong-Jeong;Cho, Hyun-Chan
    • 한국지능시스템학회:학술대회논문집
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    • 한국퍼지및지능시스템학회 2001년도 추계학술대회 학술발표 논문집
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    • pp.83-86
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    • 2001
  • In injection molding, short shot is one of the frequent and fatal defects. Experts of injection molding usually adjust process conditions such as injection time, mold temperature, and melt temperature because it is the most economic way in time and cost. However it is a difficult task to find appropriate process conditions for troubleshooting of short shot as injection molding process is a highly nonlinear system and process conditions are coupled. In this paper, a fuzzy neural network(FNN) has been applied to injection molding process to shorten troubleshooting time of short shot. Based on melt temperature and fill time, a reasonable initial mold temperature is recommended by the FNN, and then the mold temperature is inputted to injection molding process. Depending on injection molding result, specifically the insufficient quantity of an injection molded part, an appropriate mold temperature is recommend repeatedly through the FNN.

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Moldflow를 이용한 드럼세탁기 케이스의 사출성형공정에 관한 연구 (A study on the Injection Molding Process of the Case of Drum Type Washer using Moldflow)

  • 박철우
    • Journal of Advanced Marine Engineering and Technology
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    • 제33권1호
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    • pp.90-96
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    • 2009
  • Injection molding process is one of the most important methods to produce plastic parts with high efficiency and low cost. Today, injection molded parts have been increased dramatically the demand for high strength and quality applications. This report investigates that the optimum injection molding condition for minimum of shrinkage. Molding shrinkage is occurred by several reasons such as thermal shrinkage, a hardening process and compressibility. This report concentrate on shrinkage by a hardening process. As Change a holding pressure and holding time, checked deflections of X, Y, Z directions by shrinkage based on same condition. In conclusion, it was found that holding pressure is stronger and holding time is longer, the deflection by shrinkage is smaller because injection molding needs enough time for cooling and high density. The FEM Simulation CAE tool. Moldflow, is used for the analysis of injection molding process.

공정 모니터링 시스템을 이용한 최적 사출 조건 설정 (Optimum Injection Molding Condition Search With Process Monitoring System)

  • 강중근;조영기;장형건;이병옥
    • 소성∙가공
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    • 제16권1호
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    • pp.54-60
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    • 2007
  • Optimum injection molding condition for a box mold was searched by the Response Surface Analysis(RSA) with the aid of process monitoring system(PMS). Process variables on the control panel of the injection molding machine such as barrel temperatures, screw speed profile, holding pressures, etc. cannot guarantee the uniformity of the material variables directly related with the state of the product in the mold cavity. In order to make sure the state of the resin in the cavity, pressures and temperatures in the cavity, runner and nozzle were monitored in the experiment with the PMS. To accomplish the consistency of the molding process, dependent variables such as the switchover point and holding time were searched with the PMS. With a proper objective function about deflection of the box-type product, the optimum injection molding condition was obtained.