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首页> 外文期刊>INCAS Bulletin >Determination of flow front velocity and optimal injection pressures for better impregnation of E-glass with polyester in resin transfer mold
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Determination of flow front velocity and optimal injection pressures for better impregnation of E-glass with polyester in resin transfer mold

机译：在树脂转移模具中更好地浸渍E玻璃的流动前速度和最佳注射压力的测定

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Flow front velocity of resin plays a key role in yielding better impregnation of fiber reinforcement in resin transfer molding to fabricate quality composites. A video camera was used to capture the patterns of resin flowing below the grid lines drawn on the acrylic sheet of resin transfer mold and also to accurately measure the flow front velocity using an image conversion tool. The effect of flow front velocity, permeability, Reynolds number and void content at five different injection pressures on chopped strand E-glass/polyester composites consisting of 4, 5 and 6 layers has been studied. On the basis of Reynolds number of resin flow and void content present in the composite, optimal injection pressures are suggested for better impregnation of preform. Composites processed at these injection pressures gave superior properties in tension and flexure. Fractured parts of the specimens were examined on Scanning Electron Microscope to explain the causes of superior mechanical properties.
机译：树脂的流动前速度在树脂转移成型中更好地浸渍纤维增强物中起作用的关键作用，以制造质量复合材料。摄像机用于捕获在树脂转印模具丙烯酸片上绘制的网格线以下的树脂模式，并使用图像转换工具精确测量流量前速度。已经研究了流动前速度，渗透率，雷诺数和空隙含量在由4,5和6层组成的切碎链E-玻璃/聚酯复合材料上的五种不同注射压力下的效果。基于复合材料中存在的树脂流量和空隙含量的雷诺数，建议更好地注射压力以更好地浸渍预制件。在这些注射压力下加工的复合材料在张力和弯曲中具有优异的性能。在扫描电子显微镜上检查标本的断裂部件，以解释卓越的机械性能的原因。

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