臺灣博碩士論文加值系統

消失模型鑄造法（Evaporative Pattern Casting Process,
EPC Process）為一特殊的鑄造法，係以發泡聚苯乙烯（Expanded
Polystyrene, EPS）為模型，覆以不含水份與黏結劑之乾燥砂來造模之鑄
造方法。 消失模型鑄造法所使用之消失性模型其形狀設計與製作條件、
以及鑄造條件等會影響澆鑄後所得鑄件之品質與尺寸精度。因此如何去掌
握使模型擁有各種優良性質與鑄造條件，以便在澆鑄後可得品質良好而尺
寸精度佳之鑄件乃是非常重要的事! 由於消失模型鑄造法其製程與傳統濕
砂模鑄造法相異性頗大，且在工業上應用的時間並不長，因此在實際生產
上的製程與冶金問題仍多；但因由於其特殊之優點與潛力之無窮，業界與
學術界無不投入許多的心力於其研發與製程的改進上，以期能提高其鑄件
之品質與穩定性。 本研究即是在探討消失性模型其形狀設計與製作條
件、鑄造條件、鑄件表面品質與尺寸精密度之關係。利用自行設計與製作
之金屬模模具來製作消失性模型，然後探討鑄造條件(塗型劑厚度、振動
時間、減壓度、澆鑄溫度)與鑄件尺寸精密度(表面品質、表面粗度、尺寸
精密度)之關係，以建立獲得良好品質鑄件所需之消失性模型形狀設計與
製作條件以及鑄造條件最佳化之資料庫並作為參考。　　實驗結果顯示：
以不同鑄造條件下澆鑄後所得之試片，在原料粒子為B type、塗型劑較薄
、振動時間較長、減壓度適中、澆鑄溫度較低條件時所得鑄件之表面品質
較佳；原料粒子為B type、塗型劑較厚、振動時間較短、減壓度較小、澆
鑄溫度較低條件時所得鑄件之尺寸與模型之原尺寸間的差異較小；原料粒
子為B type、塗型劑厚度適中、振動時間較短、減壓度較大、澆鑄溫度較
低條件時所得鑄件擁有較佳的表面粗度。關鍵詞：消失模型鑄造法、形狀
設計、模型成型條件、鑄造條件、鑄件表面品質、尺寸精密度、表面粗度

ABSTRACT The shape design, making condition , and casting
condition etc., of the pattern used in the EPC process, will
affect the quality and dimensional accuracy of the casting after
poured. So that how to control and how to make the pattern to
have the various good characteristics, and how to control the
casting condition, in order that the castings have good quality
and dimension accuracy after poured, is a very important thing.
This study is to probe into the relationships among the shape
design and making condition of pattern, the casting condition,
and the surface quality and

dimensional accuracy of casting. By using the self-designed and
manufactured metal dies to produce patterns. And the casting
ccoating, vibration time, vacuum degree, pouring temperature,
etc. Finally, the onditions include thickness of dimensional
accuracy of castings such as surface roughness, surface quality,
dimensional accuracy, is concerned. Then we can establish the
data base of the optizimed pattern shape design and condition of
pattern making, and the casting condition of the castings with
good quality. According to the experiment, it is concluded
that when the pattern bead is B type, vibration time is longer,
vacuum degree is medium, pouring temperature is lower, the
casting after poured have better surface quality. When the
pattern bead is B type, coating thickness is thicker, vibration
time, vacuum degree, pouring temperature are lower, the casting
after poured have better dimensional accuracy. When the pattern
bead is B type, coating thickness is medium, vacuum degree is
higher, vibration time, pouring temperature are lower, the
casting after poured have better surface roughness. Keywords:
EPC process, Shape design, Pattern making condition, Casting
condition, Surface quality, Dimensional accuracy, Surface
roughness