Abstract：
Problems resulted from a poor cooling of a plastic injection mold do not like the ones from a poor filling which can be studied through the inspection on the appearance of the molding or the observation on a sequence of short shots. Plastic molding industries waste and loose a lot due to poor mold cooling, but do not know how to get rid of it because no idea why it results in troubles. This paper tries to analyze typical defects resulting from poor mold cooling.
关键词(Keywords)：
冷却系统(cooling system)、一连串短射(short shot sequence)、热传(heat transfer)、冷却孔道(cooling channels)、障板管(baffles)、喷泉管(bubblers)、热管(thermal pins)、冷却液(coolant)、模温机(mold temperature control unit)、配管(piping)、歧管(manifolds)、软管(holses)、镶块(insert)、超临界流体微发泡射出成型(super critical fluid microcellular injection molding)、光弹图(photoelastic graph)、翘曲变形(shrinkage and warpage)、公和母模侧(core and cavity sides)、成型周期(molding cycle)、热传导率(rate of heat conduction)、对流的热传率(rate of heat transfer by convection)、努塞尔特数(Nusselt number)、雷诺数(Reynolds number、层流(laminar flow)、普郎特数(Prandtl number)、紊流(turbulent flow)、热传导系数(thermal conductivity)、密度(density)、比热(specific heat)、残余应力(residual stress)
冷却系统也包括供给和回收冷却液(coolant)的装置和配管(piping)，如模温机(mold temperature control unit)、管线(pipe lines)、歧管(manifolds，见图4)、软管(holses)等，模温机调整冷却液温度到一设定温度范围，配管衔接模温机和挂在射出成型机上的模具，歧管将冷却液分流或汇集，软管则衔接歧管和模具(见图4)或模具中不同的水路。
参考文献：
1. 徐昌煜，” 几种高低模温变换的评比”， 2010 第七届先进成型技术与材料加工国际研讨会”
2. Michael Bernhard and Charles Hsu，”How to Use the Mold Filling and Mold Cooling Programs to Solve Mold Design and Molding Problems ”ANTEC Papers, 45, May 4-7, 1987，pp. 262-263
3. Charles Hsu，”How to Achieve Balanced Cooling with Internal Manifolding ”ANTEC Papers, 43, April 29 - May 2, 1985，pp. 759-760
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