近年來碳纖維增強複合材料之需求逐年遞增，與連續纖維增強複合材料相關的3D列印技術也逐漸受到關注和發展，過去本實驗室已自行開發改良3D 列印連續碳纖維複合材料系統與模組，但模組在列印速度上仍有進步空間，且尚未實現具有纖維角度90°(纖維垂直圓管中心軸)以外的圓管物件列印，且其圓管物件成品表面粗糙度不佳，因此本研究的目的為改善其列印速度，並達成具有90°纖維角度以外的圓管物件列印以及改善其表面粗糙度。
本研究改良舊版列印模組新增加熱模組與自潤材質的刮板，使其提高樹脂流動性與降低纖維與刮板之間的摩擦力以提升列印速度；相較於舊版列印模組，其平板物件列印速度為原來的5倍。而針對圓管物件，因應其列印形狀的特殊性，新增與C軸控制器可替換的A軸旋轉軸供安裝圓管模具，並將連續乾纖維經由塑型頭浸漬樹脂後通過纏繞的方式進行列印，最後找出其圓管物件合適的列印參數，成功列印出具有纖維角度90°、75°、60°、45°的圓管物件列印，相較於舊版列印模組，其圓管物件列印速度提升為原來的4倍，列印角度90°之圓管物件其表面粗糙度由107.59 µm 下降至29.86 µm。

關鍵字:複合材料、連續碳纖維、3D列印

Nowadays, the demand for carbon fiber-reinforced composite has been increasing year by year, and 3D printing technologies related to continuous fiber-reinforced composite are gradually gaining attentions and developed. In the previous research in our laboratory, the system and modules of 3D printing continuous carbon fiber composite were developed. However, the printing speed still needs to be improved, the printing of tubular parts with a fiber angle other than 90° (the fiber is perpendicular to the central axis of the tubular part) has not been realized yet, and the surface roughness of the tubular parts is not good enough. Therefore, the purposes of this research were to improve the printing speed, to achieve the printing of tubular parts with a various fiber angles, and to improve its surface roughness.
In order to improve the printing speed, this research modified the previous printing module by adding a heating module to improve the fluidity of the resin and integrating the leveling blade made of a self-lubricating material into the extrusion head to reduce the friction between the fiber and the blade. Compared to the old version of the printing module, the printing speed of the new version for flat parts was 5 times faster. For tubular part printing, a new A-axis rotating shaft was installed and shared the same controller with the C-axis which was not needed in the tubular part printing. A tubular mold acting as a support structure was attached to the A-axis, and the continuous dry fibers were impregnated with resin through the extrusion head and then printed on the mold surface through winding. As a result, appropriate parameters for the tubular part were found, and tubular parts with fiber angles of 90°, 75°, 60°, 45° were successfully printed. Compared to the old version of the printing module, the printing speed of the new one for tubular parts was 4 times faster. The surface roughness of the tubular part with fiber angles of 90° was improved from 107.59μm to 29.86μm.

Keyword: Composite materials, continuous carbon fiber, 3D Printing

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