92 research outputs found

    高品質塑膠射出機關鍵性能測試技術

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    [[note]]IAC-96-03

    Modified Desirability Function to Enhance Robust Parameter Design of Injection Molding

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    [[abstract]]多重品質最佳化乃目前射出成形工程上常見的問題,Derringer 所提之望想函數 (desirability functions, DF)為簡單且有效的解決多重品質最佳化問題的一項重要方法。然而,此梯度型(Gradient-based)的最佳化方法若應用於各別望想函數值(individual DF)在規格界限外時,將衍生出ㄧ重大問題:因各別望想函數出現極端的數值,使DF 函數評估品質綜合指標出現相當程度的誤差,因而導至尋求多重品質最佳化失效的結果。因此,本研究主要延續近年來在強健型成型參數蒐尋研究的突破性成果,尤其針對(1)判斷最佳成形參數強健與否,與(2)建立品質的迴歸數學模型,此兩項重要步驟提出以修正型的望想函數,解決評估品質綜合指標的誤差問題,藉此使多重品質最佳化問題得以順利突破。本研究預定製作3.5 吋導光板,並以導光板轉寫性的各項品質特性做為本研究提出理論之模擬與實驗驗證的載具。[[abstract]]Optimal parameter design of multiple quality characteristics is a commonly discussed issue appeared in the injection molding process. Among available many methods, Derringer has proposed a desirability function (DF) approach which can simply and efficiently resolve such a complicated optimization problem. However, such a gradient-based optimization method has problem with the situation of the individual DF value close to the outside of specification limits. This phenomenon is due to the error of evaluating the composite quality indicator, and thus causes a failure of searching desired optimization problem. This research plans to resolve such problem by promoting a modified DF model, following to our recent imperative research results in obtaining robust parameter setting. Especially, the evaluation of robustness and establishment of regression model of representing product’s quality are mainly focused in this research. A 3.5-inch light guide plate will be carried out to verification the performance by means of computer simulation and experiment.[[note]]NSC98-2221-E327-01

    Rapid Mold Surace Induction Heating for Large-Area Injection Molds

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    [[abstract]]本「大面積快速模面感應加熱技術」二年研究計畫,擬將高週波感應加熱技術推展至大面積射出成形模具表面昇溫,進行感應加熱之線圈設計並探討其在快速升溫、均勻高溫、加熱重現性與加熱範圍控制的表現。此技術開發將有助於解決高外觀品質要求或提昇表面微結構轉寫性成形需求。第一年度發展「外置式感應加熱線圈設計技術」,應用感應加熱技術於500 mm ×500 mm 以上之模具表面的快速升溫,使模面溫差在±5 °C 內之範圍。第二年度發展「內置式感應加熱系統設計技術」,設計內置式感應加熱架構,使模具可在合模時進行加熱。由於外置式加熱之感應加熱線圈與模面距離難以控制,藉由感應加熱多重物理耦合模擬分析,建置適宜之內置式感應加熱系統的加熱條件與線圈設計參數,進而縮短成型週期。本計畫預期成果有:(1) 建置外置式感應加熱線圈設計技術,(2) 建置感應加熱與冷卻水路配置最佳化技術,(3) 開發內置式感應加熱系統設計技術。[[abstract]]This three-year termed project focuses on the development of mold surface induction heating technology on large-area injection molds, including design of induction coils and performance evaluation of temperature raising rate and uniformity. The techniques developed by this study are useful not only to resolve the high quality requirement of injection-molded parts on appearance, but also to promote the replication rate of micro-features designed on mold surface. The first year project focuses on designing induction coils for external heating of mold surface above 500 mm ×500 mm. Assisted with the characteristics of rapid heating, the temperature variation by induction heating on mold surface is asked to be within ±5 °C. The project includes the optimal design of cooling systems to assure the stiffness of mold when introducing induction heating on the practical injection molds. The second year project investigates internal induction heating approach to facilitate the heating process after mold closing, such that the cycle time can be effectively reduced. Comparing to external heating method, this approach is free of disadvantages on precise position control of heating distance. Base on multiple physical analyses, the optimal design of internal induction coils can be obtained. Through this second-year project, design of external induction coil, optimal design of cooling channels for induction heating on injection molds, and coil design for internal induction heating system can be built.[[note]]NSC100-2221-E327-01

    Induction Heating of Plasticization Barrel for Injection Molding Machines

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    [[note]]MOST106-2221-E327-01

    The Applications of Developingment the Training Program for Plastic Mold Design Engineers

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    [[note]]NSC94-2517-S327-00
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