射出成型為製造業重要的生產過程，具有量產、快速且成本低等優點，應用的層面非常廣泛。現今塑膠產品都要求輕薄短小的運用，產品設計的外觀也隨著視覺變化的需求及質感的要求，品質必須不斷的提升。在薄殼射出成型充填過程中，流道淺、流動阻力大，除了需要以極高的射速將熔融的塑料瞬間射入模穴，提高模具溫度對射出成型是必然的。
提高模面溫度的方法，已有許多學者進行探討及研究，本研究模擬在使用紅外線加熱提升模面溫度下，改變模具結構及置入低熱傳導系數的鐵氟龍( Polytetrafluoroethylene，PTFE)材料來進行隔熱，探討模具熱傳影響及提升模面溫度的效果。研究結果顯示，開槽設計對提升模面溫度並無顯著的效果。另外，試著將PTFE置於模仁下方來隔絕內部熱傳，可使模面溫度提高了約33℃，冷卻時間也並未因此增加

Injection molding is an important fabrication process for polymer plastics with the advantages of mass production, fast and low cost. Its applications are quite broad in appliance, electronics, and anformative, etc. In this decade, a lot of commercial products become smaller and lighter. The relevant techniques for high demand on appearance and quality improvement bring the better products to consumers. Thin-walled injection molding is usually molded under high mold temperature and high injection pressure. Methods to raise the mold surface temperature have been investigated by many scholars. The research concentrates on the study of a rapid surface heating system for injection molding. This study explores the effects on mold surface heating efficient by changing the mold structure and design by inserting PTFE. The result shows that the simply open channel on mold surface doesn’t have the effect of increasing heating efficient. The mold design with an inserting PTFE into the bottom of cavity can raise the surface temperature about 33℃and it doesn’t affect the cooling time.

[1] M.S. Despa, K.W. Kelly, and J.R. Collier, "Injection molding of polymeric LIGA HARMs," Microsystem Technologies, vol.6, pp.60-66,1999.
[2] 林志鴻, "微射出快速模溫控制系統與玻璃模仁表面微結構複製成型探討," 機械工程學系碩士班, 國立台灣大學, 2001.
[3] Dong-Hak Kim, Myung-Ho Kang, and Y.H. Chun, "Development of a New Injection Molding Technology：Momentary Mold Surface Heating Process," Journal of Injection Molding Technology, vol. 5, pp. 229-232, 2001.
[4] Donggang Yao and B. Kim, "Development of Rapid Heating and Cooling Systems for Injection Molding Applications," Polymer Engineering and Science, vol. 42, pp. 2471 - 2481, 2002.
[5] Takushi Saito, Isao Satoh, and Y. Kurosaki, "A New Concept of Active Temperature Control for an Injection Molding Process Using Infrared Radiation Heating," Polymer Engineering and Science, vol. 42, pp. 2418 - 2429, 2002.
[6] S.C. Chen, H.S. Peng, J.A. Chang, and W.R. Jong, "Simulations and Verifications of Induction Heating on a Mold Plate," International Communications in Heat and Mass Transfer, vol. 31, pp. 971-980 2004.
[7] 楊益成, "輻射快速加熱模具表面之實驗研究," 工程科學系專班, 國立成功大學, 2001.
[8] 張沛頎, "熱塑性塑膠微射出成型技術之研究," 機械工程學系碩博士班, 國立成功大學, 2006.
[9] Bill Bulat, Mayhyar S. Dadkhah, and Scott A. Schroeder, "3D Induction Heating Simulation of a Helical Gear," ANSYS Conference Paper, 1998, pp. 313-335.
[10] 李建鋐, "微流道射出成型充模研究," 航空太空工程學系碩士班, 國立成功大學, 2007.
[11] 歐陽渭城編譯, 射出成型的不良對策: 全華科技圖書股份有限公司, 2007.
[12] 張永彥, 塑膠模具設計學: 全華科技圖書股份有限公司, 2005.
[13] 陳志鏗 and 李春穎, COSMOS/Works 2006 應用解析-基礎篇: 高立圖書有限公司, 2007.
[14] F.P. Incropera and D. P. DeWitt, Fundamentals of Heat and Mass Transfer, 5 ed.: John Wiley & Sons, 2002.
[15] ANSYS 10.0 HELP.
[16] MatWeb, "www.matweb.com."