模內熔膠溫度於縫合線位置之機械性質研究

Study of melting temperature in-mold at the location of weld line mechanical properties

林典翰(Dian-Han Lin)

指導教授 ： 韓麗龍

國立臺北科技大學/機電學院/製造科技研究所/碩士(2012年)

https://doi.org/10.6841/NTUT.2012.00492

摘要

本研究探討模內熔膠溫度(melt temperature)對縫合線(weld line)抗拉強度所造成之影響。使用射出成型方式進行實驗，將溫度感測器放置縫合線產生之位置，藉由不同截面厚度、模具溫度及熔膠溫度進行成形參數的改變，材料選用聚醯胺66(PA66)添加30%玻璃纖維(glass fiber)及聚碳酸酯(PC)添加15%玻璃纖維，以拉伸試驗方式進行機械性質之分析，再經由SEM觀察拉伸斷面之纖維配向進一步與拉伸試驗結果相互驗證。
研究結果顯示，縫合線抗拉強度會隨著感測器所測得之模內熔膠溫度提高而變大。PA66及PA66+玻纖後之試片抗拉強度會因試片厚度及熔膠溫度增加而變大，PC+玻纖之試片也有相同結果，但未強化PC試片只會因縫合線位置所測得之感測器溫度增加，而使抗拉強度提升。使用SEM觀察試片斷面之情況，可發現添加玻纖試片依纖維配向可分為表皮層及核心層，其中表皮層厚度對抗拉強度影響最大，表皮層厚度越厚，則抗拉強度有增強的趨勢。

關鍵字

熔膠溫度 ； 縫合線 ； 聚醯胺66 ； 玻璃纖維 ； 聚碳酸酯

並列摘要

This study investigated the influence of melting temperature in mold caused by the tensile strength of weld line. Using the injection molding to do the experiment, temperature sensors placed on the location of the weld line, forming parameters changed by a different section thickness, mold temperature and melt temperature, The selection of materials Polyamide 66 with 30% glass fiber and polycarbonate with 15% glass fiber, and analysis the mechanical properties by tensile test. Through the SEM , the fiber orientation of tensile fracture is further mutual authentication with the tensile test results.
　　The results show that, tensile strength of the weld line will larger when the melt temperature in mold increasing measured by the sensors. PA66 and PA66+glass fiber specimen of tensile strength will be enhanced with the increase thickness and melt temperature, PC +glass fiber specimen has the same results. But PC specimens only because of the location of the weld line within increasing temperature measured by a sensor, which makes the tensile strength upgrade. Through the SEM can be found that the cross section which attached to the glass fiber specimens can be divided into the surface and core layers according to fiber orientation. The surface layer thickness is the most influential factor to the tensile strength, the thicker of the surface layer, the more tensile strength enhanced can be found.

並列關鍵字

melt temperature ； weld line ； Polyamide 66 ； glass fiber ； polycarbonate

參考文獻

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