以工程塑膠為基材之霧化製粉技術開發

現今快速原型成品往往因為成型材料產品製造的限制，不能直接用於功能性測試，導致快速成型技術無法普遍的運用於工業中，基於考量快速成型系統的缺點，急需要新的材料成型方式，讓快速成型系統能使用一般的工程塑膠，而達到普及應用於工業。本研究主旨在於提出以工程塑膠為基材可供快速成型系統技術，研究與建立塑膠製粉的能力。研究方法是藉由霧化噴嘴之霧化概念，自行製備，可在未來開發塑膠漿料法的快速原型製程加工用之工程塑膠粉末，以提升以目前工程塑膠加工基材為代表的FDM 、SLS 等快速成型系統的精度。本研究重點為利用塑膠塑化原理，採用塑料的押出，並搭配雙流體噴嘴，自行研發出以工程塑膠為基材的霧化製粉設備，再利用霧化製粉設備來針對目前市面上的塑膠粒進行霧化製粉實驗。本論文在霧化製粉實驗過程中發現，加熱溫度、氣壓壓力，流量是決定霧化粉末顆粒大小的主要因素，若以加熱溫度高、氣壓壓力大、流量小可得到較細的塑膠粉末，希望本研究能協助現今快速成型系統中，使材料的選擇能更多樣化，與未來加工技術創新。

關鍵字

塑膠塑化；快速成型技術；雙流體噴嘴

並列摘要

Because of the limit of nowadays forming material used in Rapid Prototyping (R.P.) systems, most of them cannot be used for functional testing directly. It also limited the RP applications in industries side. An innovative plastic slurry type RP process has been proposed to overcome the material issue as well as the accuracy issue. This study is focusing on plastic powder fabrication. The product of the fabrication is engineering plastic powder which is the major ingredients of the plastic slurry. The process of the fabrication is based on spraying technology. The engineering plastic raw material is normally in pill shape. This study is applying extrusion technology to melt and to inject the liquify engineering plastic to a two phase spray nozzle. The apparatus of the engineering plastic powder fabrication has be constructed. The operation parameters has been studied. The results shown that the heating temperature, air pressure, fluid rate are the main factors in deciding the powder particle size. Moreover, higher heating temperature, higher air pressure, smaller fluid rate can lead to finer plastic powder.