By detailed analyses, this paper concludes that the weak bonding is the main factor that reduces the mechanical properties of the parts.The Ficks diffusion law was used to describe the diffusion of the molecular chains. SanchezLacombe(SL)s theory for lattice fluid was applied to calculate the mixing energy of two melts. The empirical formula by Guggenheim was used to calculate the free energy of the interface of the two melts. Finally, the prediction model of weld line in the injectionmolded parts of amorphous polymers is presented. The tensile strength of the dumbbell specimens was tested. The results showed that the computed results of degree of bonding werewellcoincidewith the experiment results. The model established in this papercan be applied to predict the tensile strength of the weld line in the injectionmolded parts of amorphous polymers.
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詹春毅,冯胜山.注塑成型制品熔接痕强度预测方法的研究[J].机床与液压,2016,44(3):136-138. . Research on Forecasting Methods of Weld Line Strength of Injectionmolded Parts[J]. Machine Tool & Hydraulics,2016,44(3):136-138