Application of the polyurethane spraying process on the large scale production of fibre-reinforced structural components with sandwich elements for IT-transportation systems

聚氨酯喷涂工艺在大规模生产 IT 交通系统用夹层元件的纤维增强结构部件中的应用

• 批准号: 248182243
• 负责人: Professor Dr.-Ing. Christian Hopmann
• 金额: --
• 依托单位: Institut für Kunststoffverarbeitung (IKV) in Industrie und Handwerk an der RWTH Aachen
• 依托单位国家: 德国
• 项目类别: Research Grants (Transfer Project)
• 财政年份: 2014
• 资助国家: 德国
• 起止时间: 2013-12-31 至 2017-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/248182243?language=en
• 关键词: Application; polyurethane; spraying; process; large

High performance parts made from composites with a polyurethane (PU) matrix have proven their economic potential in many industrial applications. Therefore, the fast cross-linking kinetics of the PU have played a decisive part in the success of the material. However, the disadvantages of the produced parts are the low fibre volume content and the use of foamed PU. The developments in the field of PU-spray impregnation of continuous fibre textiles (Resin Spray Prepregging (RSP)) in combination with an optimised forming and curing process within the scope of the joint research project knowledge (FOR860) allow to produce automated high performance parts in short cycle times with high fibre volume contents (> 50 %). Up to now, the production techniques have only been analysed for simple geometries. Therefore, the aim of the applied project is the transfer of the FOR860 knowledge to produce high performance composite parts in short cycle times to the production of highly stressed sandwich structures. For an implementation of specific products, further scientific investigations are necessary. Because of the complexity, these investigations are only feasible by interdisciplinary cooperation between industrial companies and research institutes. Within the scope of the FOR860, the results have shown that the production of highly stressed top layers for sandwich parts in short cycle times with an adjusted process technology and an industrial manufacturing equipment is possible. To ensure an acceptance of the process in the industry, highly stressed continuous fibre reinforced top layers should be initially combined with commonly used cost-effective paper honeycomb or foam cores produced in the process. Therefore, the system technology should be modified based on the findings of the FOR860, so that the sandwich structures can be produced in one step and the process can be adapted according to the resin reactivity and the foam reaction. Taking into account the parameters of the process, the characteristics of the produced parts should be analysed afterwards, e. g. surface quality, acoustic properties and mechanical values. Subsequent to fundamental investigations on planar parts, the knowledge should be transferred to the production of a lightweight IT transportation case (figure). The selected geometry of the demonstration part for the investigations allows a transfer of the results to large-area parts (e. g. in commercial vehicles or trains) as well as to applications in the field of other consumer goods.

由聚氨酯（PU）基复合材料制成的高性能部件已在许多工业应用中证明了其经济潜力。因此，PU的快速交联动力学在材料的成功中起着决定性的作用。然而，所生产的部件的缺点是纤维体积含量低和使用发泡PU。连续纤维纺织品的PU喷涂浸渍（树脂喷涂预浸（RSP））领域的发展与联合研究项目知识（FOR 860）范围内的优化成型和固化工艺相结合，可以在短周期内生产高纤维体积含量（> 50%）的自动化高性能部件。到目前为止，生产技术只分析了简单的几何形状。因此，应用项目的目的是将FOR 860在短周期内生产高性能复合材料部件的知识转移到高应力夹层结构的生产中。对于特定产品的实施，需要进一步的科学研究。由于其复杂性，这些研究只有通过工业公司和研究机构之间的跨学科合作才是可行的。在FOR 860的范围内，结果表明，通过调整工艺技术和工业制造设备，可以在短周期内生产夹层部件的高应力顶层。为了确保该工艺在工业中被接受，高应力连续纤维增强顶层应首先与该工艺中生产的常用的具有成本效益的纸蜂窝或泡沫芯相结合。因此，应根据FOR 860的发现修改系统技术，以便可以在一个步骤中生产夹层结构，并且可以根据树脂反应性和泡沫反应来调整工艺。考虑到工艺参数，随后应分析所生产零件的特性，例如：G.表面质量、声学特性和机械值。在对平面零件进行基础研究之后，应将知识转移到轻型IT运输箱的生产中（图）。用于研究的演示部件的选定几何形状允许将结果转移到大面积部件（例如，G.在商用车辆或火车中）以及在其它消费品领域中的应用。