鑄造是種有數千年的歷史的製造工藝。鑄造製程具有成本低，製程靈活性大，可獲得複雜形狀和大型的鑄件。常見鑄造方式多達十多種，其中砂模鑄造(sand casting)佔總產量比例最大。砂模鑄造依生產方式與設備可區分為垂直線、水平線，材料則可用銑鐵或回收鋼材來調配生產，各項參數對成本、品質與效率影響重大。
鑄造業面臨少子化、生產成本上升、環保節能、少量多樣等挑戰，產線須自動化、智慧化與環境永續。試產過程除了不斷的調整參數達成產品規格，同時又要兼顧成本、效率與環境..等議題，因此，如何選用最有利又可達成循環經濟目標的製程方案來生產對企業就變的相當重要。極需發展系統化的方式評估最有利的製程方案，不同於以往只靠人員經驗，同時也可保留公司珍貴的智慧資產。
本研究以紫式決策分析架構為基礎，建構一套鑄鐵產品永續的砂模鑄造製程方案評估模式，讓製程方案能在滿足客戶要求與公司利益最大化並兼顧環境永續的情況下順利試產通過驗證，並能提高決策效率、減少無效的研發投入、使用高效率、高步留率與回收鋼材用量最大化之製程、保留公司智慧資產，逐步解決鑄造業研發與製程相關人才老化、培養困難與人力不足的問題。本研究架構並能搭配產品圖面與模流軟體，組成有效率、有依據與可信任的製程評估系統。本研究以C公司砂模鑄造產線為案例，以檢驗研究效度。
實證研究結果顯示，面對數位轉型與環境永續的浪潮企業不能只依靠過去成功的經驗，需要系統化與數位化的決策模式才能存活下來，本研究提出的評估架構可作為鑄造製程決策的基石，用來發展砂模以外的各式鑄造製程方案評估，對產業界作出貢獻。本研究並探討未來研究方向。

Casting is a manufacturing process for thousands years long which is a kind of low cost, high process flexibility to obtain complex shapes and large castings. There are more than ten kinds of casting methods, among which sand casting is the largest proportion of the total output. Sand casting can be divided into vertical lines and horizontal lines according to production methods and equipment. Materials can be prepared by Pig Iron or recycled steel. Various parameters will affect cost, quality and efficiency mostly.
Nowadays, the foundry industry is facing challenges such as declining birth rate, rising production costs, environmental protection and energy saving, less but various quantity, etc. Therefore, the production line must be automated, intelligent and environmentally sustainable. During the trial production process, enterprises have to adjust parameters and consider cost, efficiency and environment to achieve the target.It is extremely necessary to develop a systematic way to evaluate the most favorable process plan, which is different from relying on personnel experience in the past, and at the same time preserve the company's precious intellectual property.
Based on the UNISON Decision Framework to construct a sustainable sand casting process plan evaluation model for cast iron products, so that the plan can be passed successfully while meeting customer’s requirements, maximizing the company's interests as well as taking into environmental sustainability. Meanwhile, to solve the aging, training difficult and shortage of manpower, the processing plan has to improve decision efficiency, reduce ineffective R&D investment, use high-efficiency, high yield and maximize the amount of recycled steel production process and retain the company's intellectual assets. The research takes the sand casting production line of company C as a case to test the validity and out coming shows that enterprises need a systematic and digital decision-making model to survive.
The study is not only for making contributions to the industry as cornerstone of casting process, decision-making, and used to develop the evaluation of various casting process solutions other than sand molds, and also discusses the research directions in the future.

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