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  • 學位論文

雙色射出成型製程對翹曲行為與機械性質之研究

Study on the Warpage and Tensile Strength of Over-Molding Products

指導教授 : 黃世欣

摘要


本論文之研究主要在探討雙色射出成型製程對於不同熱塑性材料的翹曲和抗拉性質之探討,使用結晶性材料HDPE/PP、非結晶性材料ABS/PC、添加玻璃纖維HDPE+20%GF/PP+20%GF、ABS+20%GF/PC+20%GF結合為實驗設計及材料,並以兩種不同厚度之試片(3mm、2mm)經由一次一因子法實驗分析結果,探討不同製程參數下材料對於翹曲跟抗拉強度之影響,以及添加玻璃纖維後產品所做的變化,最後再以田口式實驗法將ABS/PC之實驗參數做一個完整的規劃,以找到相關製程參數下彼此之影響性。經由一次一因子研究中得知,翹曲值隨著熔膠溫度、射出速度、保壓壓力、模具溫度提高而增加,而隨著冷卻時間增加而減少。在抗拉強度部份,則隨著熔膠溫度、射出速度、保壓壓力、模具溫度、冷卻時間提高而增加。而在ABS/PC結合試片田口翹曲實驗方面,冷卻時間為其最重要的影響因子,其次是模具溫度及熔膠溫度,結果得知以較長的冷卻時間、較低的模具溫度、以及較低的熔膠溫度,可以得到較低的翹曲值。而在玻璃纖維部份,添加玻璃纖維可以有效的降低產品的翹曲值,以及增加產品的抗拉強度。

並列摘要


This study investigated the effects of process conditions on the warpage of semi- crystalline and amorphous materials by over-molding process. HDPE/PP and ABS/PC materials are used for this study and processing parameters, like melt temperature, injection speed, packing pressure, cooling time, and mold temperature, are changed to study the effects on the warpage of the over-molding process. The top-bottom configuration of tensile bar is set for the over-molding process. The results showed that HDPE/PP has warpage value from 10.26 ~ 12.98 mm while ABS/PC has value from 3.70~10.05 mm. However, HDPE/PP both with 20 wt% glass fiber has warpage value from 3.83~5.66 mm. It showed that amorphous material (ABS/PC) has less warpage than that of semi-crystalline (HDPE/PP) and material with glass fiber also reduced the warpage of the molded parts. The warpage value increased as the melt temperature, injection speed, packing pressure, and mold temperature increased. However, warpage value reduced as the cooling time increased. The tensile strength increased as the melt temperature, injection speed, packing pressure, mold temperature, and cooling time increased. The Design of Experiment(DOE) showed that the critical factors to affect the warpage value are cooling time, mold temperature, and melt temperature accordingly.

並列關鍵字

Over-molding Warpage Glass fiber Tensile Strength

參考文獻


參考文獻
1. 朱松年,「超臨界流體微細發泡射出成型對聚烯烴彈性體/蒙脫土奈米複合材料機械與熱性質之研究」,清雲科技大學,碩士論文,民國九十七年十月。
2. 江啟瑋「超臨界流體微細發泡射出成型對紡紗機輥輪厚度收縮現象之探討」,清雲科技大學,碩士論文,民國九十五年七月。
3. 吳政憲,「射出成型應用於導光板之製程研究」,行政院國家科學委員會專題研究計畫成果報告,NSC 90-2216-E-212-001。
4. 林偉華,「熱可塑性彈性體(TPE)的最新技術動向」,塑膠資訊,第四十二期,1-13頁,民國八十九年。

被引用紀錄


呂雨原(2017)。堆高機飾板翹曲分析〔碩士論文,國立虎尾科技大學〕。華藝線上圖書館。https://www.airitilibrary.com/Article/Detail?DocID=U0028-1807201721311500

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