熔膠翻轉技術應用於醫療安全吊環成形之研究

A Study of Melt-Flipper Technology on Molding Medical Safe Clip

邱廉翔(Lian-Siang Ciou)

指導教授 ： 韓麗龍

國立臺北科技大學/機電學院/製造科技研究所/碩士(2010年)

https://doi.org/10.6841/NTUT.2010.00517

摘要

醫療安全吊環(medical safe clip, MSC)為醫療搬運輔助器中的一個重要零件，除了需要有高的承載力外，每一個吊環的承載力也必須穩定一致。在直進式流道的射出成形中，熔膠從射嘴到模穴的充填過程中往往會有許多不確定的因素干擾，將造成品質的不穩定，進而影響醫療安全吊環結構強度與承載力。
本實驗將設計兩種不同的流道型式：(1)翻轉式流道技術(Melt-Flipper Technology)，(2)直進式流道。分別針對兩種流道進行CAE模流分析、模具製作、射出成形、與吊環承載力實驗。最後比較兩種流道在不同成形參數下，對吊環的承載力及承載穩定性之影響。
由CAE模流分析結果顯示，使用翻轉式流道技術成形之吊環，流道斷面的熔膠溫度較為均勻。在實際射出實驗中，射出速度較高時，翻轉式流道成形之吊環承載力較大。然而較高的射速會在吊環表面產生與流動方向垂直之流痕(flow mark)。當射出速度在較低的情況，兩種流道之吊環承載力差異不大，但吊環比在高射速時有較大的承載力與較好的穩定性。最後我們發現，用翻轉式流道射出的醫療安全吊環承載力較直進式流道穩定，亦即翻轉式流道有較大的成形視窗。

關鍵字

醫療安全吊環 ； 翻轉式流道 ； CAE模流分析 ； 射出速度

並列摘要

Medical safe clip, MSC, is an important part of Patient Handling Sling. It must be provided with high and identical bearing capacity. For the injection molding of straight-advance runner, melt flow from nozzle to cavity is subjected to the obstacle of uncertain factors. This will bring about unstable quality that affects the strength of the structure and bearing capacity of the MSC.
In this study, two different types of runners was designed: (1) Melt-Flipper technology, (2) straight-advance runner. Two runner types were experimented by using CAE moldflow analysis, mold manufacture, injection molding, and bearing capacity test for the MSC. Finally, we compare the bearing capacity value and the bearing capacity stability with different molding parameters.
Results of CAE analysis show the melt temperature of MSC crosssection using Melt-Flipper technology is more uniform than that using the straight-advance runner. The bearing capacity of MSC using the Melt-Flipper is better during injection molding when the injection speed is high. However, the higher injection speed will form the flow mark which is perpenticular to the flow direction on the MSC surfsce. At lower injection speed, the bearing capacity of MSC using the two types of runners is nearly the same, but the MSC possesses higher bearing capacity and support stability at lower injection speed than that at higher injection speed. Finally, we find that the bearing capacity of MSC using Melt-Flipper technology is more stable than that using the straight-advance runner. This means Melt-Flipper technology has a larger molding window.

並列關鍵字

medical safe clip ； Melt-Flipper technology ； moldflow analysis ； injection speed

參考文獻

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