- 學位論文
變模溫控制與肉厚變化對於結合線深度與拉伸性質影響之研究
Influence of Variable Mold Temperature Control and Part Thickness on the Depth of Weld line and Associated Tensile Properties
摘要
中文摘要 縫合線無論在塑膠製品或在射出成型品上，皆往往會造成嚴重的強度缺陷與外觀不良。在可攜式電子產品4C 的時代裡，講求短、小、輕、薄、品質、安全、產品外觀及舒適性的要求，已達到極緻的重視。由此可見塑膠薄件的強度、品質的要求及其相關的影響因子將會越來越被重視，因此縫合線的強度又再度成為射出成型的主要課題。 本研究將針對 4C 電子產品最常用的PC+ABS 工程塑膠之薄殼件當對象，取PC-540來進行射出成型之探討。採用不同厚度、不同製程條件與非對稱模溫，把有縫合線的結果去作符合標準之ASTM D 638 的拉伸試驗，以研究和比較有關它們在機械性質、品質與強度方面的影響。 研究結果顯示，提升料溫、模溫、射出速度等成型參數對於結合線深度能有大幅度的縮小，且隨著結合線深度的縮小也進階的提升試片的抗拉伸強度。而使用感應加熱加熱至130℃與傳統的比較中，在厚度1.0mm之結合線深度較傳統的下降34％而抗拉伸強度則提升3％，在厚度1.5mm之結合線深度較傳統的下降80％而抗拉伸強度則提升26％，在厚度2.0mm之結合線深度較傳統的下降22％而抗拉伸強度則提升1.78％，隨著結合線深度的下降也使得抗拉伸強度得以增加。在感應加熱的製程中，也可明顯的得知隨著試片厚度越薄對於公模之結合線深度影響也較大。 從本研究中，可以充分瞭解結合線深度與抗拉伸強度之質接影響，並建立相關的參考數據以供日後可以對結合線的機械性質更進一步的了解。 關鍵字：變模溫控技術、非對稱模溫、結合線深度、拉伸強度
並列摘要
英文摘要 Weld line in the plastic products no mater or in the injection molding products, the are often seriously Defect and intensity appearance of adverse. 4C in the era of portable electronic products, emphasis on short, small, light, thin, quality, safety, product appearance and comfort requirements, has reached the ultimate attention. This can see a thin piece of plastic intensity, quality requirements and their associated impact factors will be more future more attention, so suture tensile intensity again become a major subject of injection molding. This study will address the most commonly used electronic products PC + ABS engineering plastic of the shell pieces when the object, take PC-540 into the future conduct of the injection molding. Use of different thickness, different process conditions and non-symmetrical mold temperature, by placing the sutures to be consistent with the results of standard ASTM D 638 of the pull-stretching experiments to study and compare information on their mechanical nature, quality and intensity in impact. The results showed that raise material temperature, mold temperature, injection molding parameters for the combination of speed lines have significantly reduced the depth, and with the combination of narrow-line depth has also advanced to enhance the anti-tensile strength of specimen. The use of induction heating heated to 130 ℃ in comparison with the traditional, in line with the thickness of 1.0mm depth of the decline in the more traditional 34% while the anti-tensile strength was raised by 3%, in line with the thickness of 1.5mm depth of the decline in the more traditional 80% of the anti-tensile strength was raised by 26%, in line with the thickness of 2.0mm of the decline in the depth of the more traditional 22% while the anti-tensile strength was raised by 1.78%, with the combination of the depth of the decline in line also makes anti-tensile strength can be increase. In the induction heating of the manufacturing process can also be evident that as the specimen thickness is thinner lines for the public mode of the combination of the depth of the impact rate as well. From this study, can not fully understand the depth and integrated line of anti-impact tensile strength of the quality of access and the establishment of the relevant reference data for future combination of lines can be further understanding of mechanical properties Key word ：dynamic mold temperature control、non-symmetry mold temperature、depth of weld line、tensile strength