| 气膜润滑剪切机头及其在短纤维增强胶管中的应用 |
| Air-lubricated Shear Die and Its Application to Short Fibre-reinforced Rubber Hose |
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| DOI： |
| 中文关键词: 气膜润滑 剪切机头 短纤维增强 胶管 |
| 英文关键词: air lubrication shear die short fibre-reinforced rubber hose |
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| 中文摘要: |
| 气膜润滑是挤出时在胶料和口型壁之间形成一层很薄的空气膜，不仅可以降低流动阻力，提高挤出量，同时也可降低挤出膨胀。在短纤维增强胶管挤出中可以通过内芯旋转使短纤维沿周向取向以提高爆破强度，但也因内芯旋转使挤出物扭转造成挤出不稳定。利用气膜润滑技术设计制造的气膜润滑剪切机头，成功地解决了由于内芯旋转而产生的挤出扭转造成的挤出不稳定现象。通过流场分析计算，从理论上预测了利用气膜润滑消除物料旋转的可行性。介绍了用气膜润滑剪切机头制造短纤维增强胶管的实验结果。 |
| 英文摘要: |
| A thin air film formed between rubber and die wall during extrusion of rubber can not only reduce the flow resistance and increase the output but also reduce the die swell. By means of the air-lubricated shear die，the short fibre orientation in hoop direction can be achieved by rotating a mandrel in short fibre reinforced rubber hose extrusion to increase the burst strength of the hose without unstable extrusion due to the extrudate torsion by rotating mandrel. The feasibility of using air lubrication to eliminate the extrudate rotation is theoretically predicted through the analysis of flow field. The test results of short fibre-reinforced rubber hose produced with the air-lubricated shear die is described. |
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