Solidification of Polymer Flow in a Cold-Walled Circular Channel

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Title:	Solidification of Polymer Flow in a Cold-Walled Circular Channel
Other Titles:	塑料射出成型冷澆道中之固化現象
Authors:	Lin, Gwo-geng;Tseng, Hsieng-cheng;Ju, Yi-hsu
Contributors:	淡江大學化學工程與材料工程學系
Keywords:	冷澆道;固化;射出成型;塑料
Date:	1987-05
Issue Date:	2013-03-12 11:21:14 (UTC+8)
Publisher:	臺北市：中國化學工程學會
Abstract:	The problem of transient melt solidification in the runner during the injection molding process is investigated by the use of a boundary-tracking baaed finite difference method. Simulated results reveal that the thickness of the solid layer is from 1 to 5 percent of the radius of a circular runner when the length is up to 25 cm. It also shows that, for a circular runner with a length of 48em and a radius of 0.48 cm, the calculated pressure drop is lower than that obtained by the TM1C program developed by CIMP (The Cornell Injection Molding Project) in which the melt solidification is ignored. An explanation is riven by examining the shear rate and the temperature distributions in the runner. This method can be used in a runner design routine to balance the flow in the runner of an injection mold by varying its diameter or length. 本文利用一種可以追蹤遍界移動的有限差分法來研究塑料射出成型中澆道內之流動固化現象。研究結果顯示在25公分長的圓形澆道，其固化層厚度(PP材料)約為澆道半徑之1~5%。同時，研究模擬出來之壓降比沒有考慮固化現象所計算之壓降略低；這可以從進一步探討剪率和溫度分佈，而得到合理的解釋。本研究方法可應用於澆道設計中'藉改變其半徑或長度而得到平衡之流量；並可預估壓降。
Relation:	Journal of the Chinese Institute of Chemical Engineers=中國化學工程學會會誌 18(3), pp.179-187
Appears in Collections:	[Graduate Institute & Department of Chemical and Materials Engineering] Journal Article

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