本研究開發多噴嘴氣壓擠出積層製造系統，應用於列印多材質高分子材料與具電性感測墊片。運用氣壓擠出成型噴頭，將液態材料擠出再以UV光進行固化。多噴嘴氣壓擠出積層製造系統架構主要整合PC人機與CNC控制器，進行三軸運動控制與多材質材料擠出流量控制。另周邊I/O控制包括正負壓與光固化光源，並外加DA控制器可彈性控制氣壓大小，程式設計則以數值控制軟體搭配PLC撰寫與規劃，以實現積層製造機台全自動化運作。

本研究實驗結合商用3D列印切層軟體Simplify 3D，透過載入不同圖檔設定不同材料，並透過Python進行路徑控制G-Code資料之後處理，符合本研究所開發多噴嘴氣壓擠出積層製造系統使用。本系統成功噴印一多材質結構墊片，包含雙層軟硬材噴印墊片與三層軟硬材噴印墊片，以及具網格蜂槽結構軟硬材結構與軟材結構之快速3D成型模具。且成功列印具三層結構與電極板之壓電式感測墊片，並測試其具有壓電特性。

This research develops a multi-nozzle pneumatic extrusion additive manufacturing system for printing multi-material polymer materials and electric sensing pads. The liquid material is extruded using a pneumatic extrusion nozzle, and solidified by a UV lighting source. The multi-nozzle pneumatic extrusion based additive manufacturing system architecture mainly integrates a PC human-machine and a CNC controller for three-axis motion control and material extrusion flow control. In addition, the peripheral I/O control includes positive and negative pressure and UV lighting source. A DA controller can flexibly control the air pressure. According to different flow speed or material, the program design uses a numerical control software to integrate the PLC writing and planning to realize the fully automated operation of the additive manufacturing machine.

This research combined with commercial 3D printing and slicing software Simplify 3D, which can set different materials by loading different images, and path control G-Code data through Python. After Python processing, the G-Code data can match the multi-nozzle pneumatic extrusion based additive manufacturing system developed by this study. The developed system successfully printed a multiple material structure pad, including double-layer pad and three-layer pad, as well as mesh and bee structure and fast 3D printing mold of soft material structure. A sensor pad with a three-layer structure and electrode plate was to successfully fabricated and shows its piezoelectric characteristic.

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