本研究探討丙烯-丁二烯-苯乙烯 (Acrylonitrile Butadiene Styrene,簡稱:ABS塑膠)在不同的射出參數與模溫條件對接合強度的影響,本研究使用兩種不同的ABS塑膠材料分別與90°和75°結合角度的斷面進行接合,製作成ASTM-D256衝擊試片,再使用IZOD衝擊試驗機檢測衝擊強度,在實驗的過程中透過改變射出成型機的射出速度、保壓壓力、保壓時間以及模具溫度等參數並記錄觀察其衝擊的結果,探討射出參數對接合強度的影響狀況。使用田口方法求得射出成型接合的影響控制因子,並利用變異數分析求得各項實驗參數的貢獻度。此外,本文以量測射出壓力的方式計算ABS塑膠的相對黏度(Relative Viscosity),再分別使用不同相對黏度的射出速度進行射出成型接合,並取得衝擊後的實驗數據與田口實驗數據做比較。 經實驗後發現在90°接合實驗中提升射出速度與模具溫度能有效增強接合的強度,而在75°接合實驗中,降低射出速度、提升模具溫度對試片的接合強度越好。而由田口方法求得的最佳參數組合,經驗證實驗後也確實能有效的增強接合的強度。在黏度實驗的部分,計算出高、中、低三種不同的相對黏度,不同黏度的射速進行試片接合並從衝擊後所得的結果中發現 90°接合時黏度越低(射出速度越高) 接合強度越好,75°接合則是黏度越高(射出速度越低)強度越好,與田口實驗所得之結果相符。
In this work, the adhesion strength of insert molding with two types of joint geometry is studied. The material used is Acrylonitrile Butadiene Styrene (ABS) and the main different of the joint geometry are the contact angles, which are 90°and 75°, respectively. The specimen dimension is designed according to the ASTM-D25 Standard. The influence of injection parameters such as injection speed, holding pressure, holding time, etc. on the adhesion strength of insert molding are investigated through the Taguchi method. In addition, the effects of the different factors are also studied by ANOVA approach. In order to examine the influence of the melt viscosity variation in injection molding, a pressure sensor is installed in the cavity to calculate the melt viscosity by the injection pressure data. The data shows that a higher mold temperature can enhance the adhesion strength for both contact angles but only a higher injection speed is good for the 90 ° contact angle of joint geometry. The experiment for investigating the influence of different melt viscosities on the adhesion strength of insert molding is also implemented. The result also agree that the previous result calculated by Taguchi method. Keywords:insert