Deep drawing of commingled yarn fabric reinforced thermoplastics

混纺纱织物增强热塑性塑料的深拉

• 批准号: 13650120
• 负责人: FUJIWARA Junsuke
• 金额: $ 0.83万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13650120/
• 关键词: Molding process; Deep drawing; Commingled yarn; Polypropylene resin; Glass fiber; Mouldability; Wrinkle formation; Composites; ポリプロピレン; しわ発生

The use of continuous fiber reinforced thermoplastics and thermosets as lightweight heavy-duty engineering materials has increased because of their obvious advantages. Compared to thermosets, thermoplastic composites have superior damage tolerance, good hot/wet performance, unlimited shelf life, short processing cycles and easy recycling. In this report, commingled yarn fabric of glass fiber and polypropylene resin was used. This material has become progressively more attractive to various industrial sectors. But useful molding process are not confined yet because it was developed only few years ago.The results of the standardized deep drawing investigations, using pre-consolidated material of commingled sheets of glass fiber and polypropylene fibers, are carried out. It shows that the standardized deep drawing tool, used for the investigations outlined in this paper, is indispensable for designers. Apart from the process parameters, it is possible to examine the maximum drawing depth of any chosen reinforced material.The deep drawing was carried out with various drawing depths and various punch radii. The main results obtained were as follows:1. The heating temperature of the composite material should be 220°C and the mould temperature about 100°C, to obtain optimum quality of the parts.2. The maximum drawing depth decreased with decreasing punch radius.3. Wrinkle formation occurred at the 0°portion because of fiber buckling, and at the 45°portion because of shear deformation.

连续纤维增强热塑性塑料和热固性塑料作为轻质重型工程材料的使用因其明显的优点而有所增加。与热固性材料相比，热塑性复合材料具有优异的损伤容限、良好的热/湿性能、无限的保质期、短的加工周期和易于回收利用。在本报告中，使用了玻璃纤维和聚丙烯树脂的混纺纱织物。这种材料对各个工业部门越来越有吸引力。但有用的成型工艺尚未受到限制，因为它是几年前才开发出来的。使用玻璃纤维和聚丙烯纤维混合片材的预固结材料进行了标准化深拉研究的结果。它表明，用于本文概述的研究的标准化拉深工具对于设计师来说是不可或缺的。除了工艺参数之外，还可以检查任何所选增强材料的最大拉深深度。深拉深是通过不同的拉深深度和不同的冲头半径进行的。主要研究结果如下： 1．复合材料的加热温度应为220℃，模具温度为100℃左右，以获得最佳的制件质量。2．最大拉深深度随着冲头半径的减小而减小。3． 0°部分由于纤维屈曲而形成皱纹，45°部分由于剪切变形而形成皱纹。