熱澆道為塑膠射出成型及金屬粉末射出成型之重要工具。本研究”厚膜式熱澆道”之製造為利用特殊模具鋼，加工成設計完成之外觀後，以網印的方式將絕緣漿料及電阻漿料印刷上基材，再經過高溫燒結先後附著上噴嘴主件。可做出一體成型且最大直徑為13毫米之熱澆道噴嘴，藉由噴嘴主體直徑縮小使其澆口間距縮小，改善塑料之流動性，因此可應用在輕、薄、短小的零組件上。
本研究調配電阻漿與銀漿之比例，使導電材料在電路中可以適度產生聚集效應而形成導電凝團，讓加熱元件在小功率的電源供應下可以升到高溫、性能最佳化。以此方式製作電熱膜熱澆道，比較新式熱澆道與傳統線圈式熱澆道之性能，發現電熱膜熱澆道之加熱效率快、傳熱佳，加熱器與噴嘴口的溫差僅僅20℃左右；遠小於螺線圈熱澆道的60℃。

Hot spure is a very important device for plastic injection molding and metal injection molding. This research apply the thick-film technique on the special mold steel, which was design and manufacture. It was screen printing with insulate and resistance paste on it. The specimen was co-fired after attaching the main spray nozzle. The diameter of spray nozzle was control at the size of 13 mm. According to the diameter of spray nozzle, when the spur space is reduce the fluidity of paste is modify therefore it can be apply on small, light, and small component.
This research have develop a mixed paste consist of resistance paste and silver paste. The appropriate amount of paste was printed on the circuit. It triggered the conductive paste to aggregate and agglomerate which cause the power supply to apply a minimum small power to reach a high temperature and optimize the performance. This research was compare with the conventional hot spur with the screen print hot spur. It was detected that the screen print hot spur is more efficiency and conductive when co-firing. The heater and spray jet is control at 20℃ which is better than the conventional hot spur at 60℃.

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