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Numerical Simulation and Experimental Research on Coupling Temperature Field of the Reaction Forming Mould
Author(s): 
Pages: 73-80
Year: Issue:  8
Journal: Chinese Journal of Mechanical Engineering

Keyword:  mould heating systemcoupling temperaturenumerical simulationerror sensitivity analysisproportion-integration-differentiation(PID) control;
Abstract: 研究模具加热系统耦合温度场问题.根据模具加热系统的传热机理,将加热系统分为外部可控温度场和内部固化反应温度场.提出将模具内部反应固化温度场,作为外加可控温度场内载荷的耦合温度场建模方法,并进行数值模拟.以团絮状聚酯模塑料(Bulk molding compound,BMC)固化成型模具为研究对象,进行温度场试验;采用误差敏度分析法,对外加可控温度场进行热源强度误差敏度分析,计算出误差最大位置,以此来提高模具加热系统的制造精度,降低试验误差;通过改进加热工艺,实施三段式加热,结合多通道比例积分微分(Proportion-integration-differentiation,PID)控制器控制技术,按给定曲线拟合升温;数值模拟与试验结果吻合较好,模具型腔温度场的均匀性达到行业标准要求.
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