3C產品在組裝技術上,超音波熔接的應用相當的普及,在驗證產品功能、安全及品質,落地實驗為評估該產品功能的重要指標,但近年來各國際大廠對產品的安全性特別重視,所以開始要求測試超音波熔接後的強度,故本研究主要在探討塑料因料溫過高造成熱裂解及添加二次料對超音波熔接後強度的影響。 研究中利用Teijin PC料,採用正三角形的熔接線設計配合料溫300℃、320℃、340℃、360℃及100%原料、80%原料+20%二次料、60%原料+40%二次料、100%二次料和0.4mm、0.5mm熔接線高度設計,交叉組配後共32種條件進行數據的分析及探討。 研究結果顯示,在相同二次料比例下,利用改變料溫,拉拔試驗後所得到的數據顯示,當料溫提高時,拉拔強度則呈現下降的趨勢。在相同料溫下,透過改變二次料比例,拉拔試驗後所得到的數據顯示,當添加二次料的比例增加時,拉拔強度則呈現不規則的趨勢。改變熔接線的高度,拉拔試驗後所得到的數據顯示,當添熔接線的高度增加時,拉拔強度則呈現下降的趨勢。綜合上述結果影響超音波熔接後強度,其中過高的料管溫度影響較大,二次料比例影響次之。
Ultrasonic welding technology is popular in 3C product assembling. Product safety has become an important issue in recent years, therefore, the welding strength test become a necessary test for product safety. In this study, PC produced by Teijin added specific percentage (20%, 40% and 100%) of secondary material was used to discuss the effects of welding strength in different melt temperature(320℃, 340℃ and 360℃). The results shows that in the same percentage of secondary material, the tensile strength increased while increasing the melt temperature, to increase the percentage of secondary material the tensile strength will be un-predictable, with different height of welding, the tensile strength will decrease while raising the height of welding line. Therefore, we can found that the strength of ultrasonic welding was influenced by melt temperature more than the percentage of secondary material.