利用可视化手段对不同纤维含量热塑性复合材料不同型腔厚度的充填过程进行了动态观察，实验结果表明，尺寸及材料特性对薄壁塑件的熔体流动行为有较大影响，随着壁厚的减薄，复合材料在低速注射条件下熔体充填型腔的速度在后期有突然增大的现象，在高速注射条件下，熔体充填速度会迅速下降，而纤维含量较高的复合材料由于剪切热的作用充填速度下降较小。该研究为薄壁热塑性复合材料注塑成形技术的深入研究提供了参考。
Visual technology was applied to observe the dynamic filling process of thern:oplastic composite materials with different contents of fiber in the different cavity thickness mold. It is indicated that the melt' s filling behavior of thin-wall plastics is greatly influenced by both scale and the material variety. As the reducing of cavity thickness, :he melt's filling speed of composite materials in the cavity increases suddenly at the end of filling process on the condition of the low injecting speed. Regarding the high injecting speed, the mel:'s filling speed falls down rapidly, but the rate of descend is lower due to the shear heat of composite materials with the higher content of fibers. The research can provide experiment evidence for the in-depth study on the injecting molding technology of thermoplastic composite materials.
参考文献
| [1] | 叶鼎铨.玻璃纤维增强热塑性塑料的发展概况[J].中国塑料,2005(02):8-11. |
| [2] | P.J.Hine;R.A.Duckett .Fiber Orientation Structures and Mechanical Properties of Injection Molded Short Glass Fiber Reinforced Ribbed Plates[J].Polymer Composites,2004(3):237-254. |
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