異質接合尼龍6與連續碳纖維纏繞之鋁合金嵌件包覆射出成型研究;Heterogeneous bonding of polyamide 6 and continuous carbon fibers winding aluminum alloy inserts for over-molding injection

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Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/95830

Title:	異質接合尼龍6與連續碳纖維纏繞之鋁合金嵌件包覆射出成型研究;Heterogeneous bonding of polyamide 6 and continuous carbon fibers winding aluminum alloy inserts for over-molding injection
Authors:	林伯紘;Lin, Bo-Hung
Contributors:	機械工程學系
Keywords:	包覆成型;嵌件成型;異質材料結合;連續碳纖維;PA6;Over-molding;Insert molding;Combination of heterogeneous materials;Continuous Carbon Fiber;PA6
Date:	2024-07-09
Issue Date:	2024-10-09 17:19:07 (UTC+8)
Publisher:	國立中央大學
Abstract:	現今講求輕量且兼具高強度性能之產品在市面上已越發常見，在眾多材料中各類皆有其特點，如塑膠材料就有重量輕、低成本及易成形的特性，金屬材料則是有著高強度、導熱性良好的性能而常被應用於工業之中，因此本次研究將探討以射出成型將異質材料接合之製程，首先會以SolidWorks設計嵌件，再使用Moldex3D軟體模擬分析連續碳纖維經過熔膠充填所造成的偏移，而後使用塑料尼龍6 (Nylon 6)又稱聚醯胺6(Polyamide 6, PA6)與鋁嵌件以射出成型的製造方式，將兩相異質材料做結合以減少二次加工達到取長補短的效果，擺脫傳統接合的方式並發揮其特點，此外還會加入連續碳纖維(continuous carbon fibers)強化複合材料以提升試片之性能，最後以拉伸試驗測試試片之抗拉強度再進行分析與探討。由Moldex3D 模擬結果可知連續碳纖維X型纏繞鋁嵌件的製作方式可行，除了能有效地使纖維纏繞固定在嵌件上並維持拉力外，也排除纖維偏移至試片外之瑕疵。本研究實驗所使用的是包覆成型中的嵌件射出成型，先將連續碳纖維纏繞上鋁嵌件形成所需的預製件後，置入模穴內並充填塑料，待其保壓與冷卻頂出後即完成一個成型品，該製程參數是使用田口法四因子三水準的L9(34)直交表來進行射出，待試片完成後則進行拉伸試驗的步驟。最終拉伸結果顯示，PA6加連續碳纖維與純PA6相比，只有些微的增強其抗拉強度，且試片內含有屬於脆性材料的連續碳纖維使得原材料性質為延性的PA6 發生改變，鋁嵌件的存在也影響熔膠的流動進而導致過多的殘留應力出現於嵌件周圍，最終在拉伸時於該範圍產生斷裂破壞的情況，至此期望此次研究結果於未來對其製程優化時能做為參考之依據。;The demand for high-strength lightweight products has become increasingly common in the market. Among various materials, plastics are known for their light weight, low cost, and ease of forming, while metals offer high strength and good thermal conductivity, making them widely used in industries. Therefore, this study explores the process of combination of heterogeneous materials through injection molding. Initially, components are designed using SolidWorks, followed by simulation and analysis using Moldex3D software to examine the displacement caused by continuous carbon fibers during the melt-filling process. Subsequently, Nylon 6, also known as Polyamide 6 (PA6), and aluminum components are manufactured using the injection molding process to combine the two dissimilar materials, aiming to reduce secondary processing and leverage their respective advantages.Additionally, continuous carbon fibers are incorporated into the composite material to enhance the performance of the specimens. Finally, tensile tests are conducted to analyze and discuss the specimens’ tensile strength. The Moldex3D simulation results demonstrate the feasibility of the process involving continuous carbon fibers wound at X type around aluminum components, effectively securing the fibers to the components and preventing displacement flaws in the specimens. The experimental process used in this study involves insert molding in over-molding injection, where continuous carbon fibers are wound onto aluminum components to form performance parts,which are then placed in the mold cavity and filled with plastic. Upon completion of the molding process, parameters are determined using the Taguchi method with an L9(34) orthogonal array. After the specimens are produced,tensile tests are conducted. The final tensile test results show that PA6 reinforced with continuous carbon fibers exhibits a slight increase in tensile strength compared to pure PA6.Moreover, the presence of brittle continuous carbon fibers in the specimen alters the ductile nature of PA6. The presence of aluminum inserts also affects the flow of the melt, leading to excessive residual stresses around the inserts, ultimately resulting in fracture within that region during tensile testing. These findings are expected to be a reference for optimizing the process in future research.
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