Methodology for increasing the uniformity of fiber-injection-molded preforms

提高纤维注射成型预制件均匀性的方法

基本信息

项目摘要

Due to the scarcity of resources and energy, stricter legislation regarding fuel consumption and emissions in the transport sector and the growing environmental awareness among the population, the importance of system-efficient lightweight construction has increased significantly in recent years. Fiber-Reinforced Plastics (FRPs) have a high potential due to their density-specific very good stiffness and strength. Currently, the use of FRPs is limited due to the high material and manufacturing costs in mass production. Long fiber reinforced semi-finished products represent a cost-effective alternative in semi-structural applications such as claddings.For the manufacturing of long fiber preforms, currently sequential processes are used, where the contour is cut from nonwovens and mats, which are available as two-dimensional semi-finished products in the form of rolled goods, and consecutively formed. This goes hand in hand with corresponding waste, which leads to higher material costs. Additionally there are direct processes, in particular the fiber spraying process.A promising approach for the direct production of three-dimensional long fiber preforms without the intermediate step of two-dimensional semi-finished products is the fiber injection molding process. The process allows the production of three-dimensionally formed long fiber semi-finished products without cutting waste by blowing fibers into a closed mold by means of an air stream. This process has the potential to locally adjust the density of the fiber structure. One impediment to the use of fiber injection molding as a preforming process is the uniformity of the fiber structure achievable to date, which leads to problems during subsequent infiltration.In order to use fiber injection molding process for economically manufacturing preforms, the uniformity of the manufactured preforms must therefore be improved. Based on the shown preliminary work, the injection process by the airstream in particular will be investigated in more detail. More homogeneous properties are to be achieved by uniform filling of the injection mold despite the inconstant fiber volume flow caused by the formation of fiber bunions. The aim is therefore to actively influence the process by controlling the parameters relevant to the injection process in order to achieve a uniform fiber deposition.The planned investigations shall make a significant contribution to understanding the interaction between the injection parameters and the resulting preform properties, uniformity in particular.
由于资源和能源的稀缺性,关于运输部门的燃料消耗和排放以及人口中的环境意识的严格立法,近年来,系统有效的轻质建设的重要性大大增加。纤维增强的塑料(FRP)由于其密度特异性非常好的刚度和强度而具有很高的潜力。目前,由于批量生产中的材料和制造成本高,FRP的使用受到限制。长纤维增强的半成型产品代表了在半结构应用中的一种具有成本效益的替代方案,例如claddings。对于长期纤维预成式的制造,使用了顺序的过程,在非织造和垫子上切割轮廓,这些过程可从非织造和垫子上切割,这些过程可作为二维半生产产品以卷卷成型的形式获得,并形成了卷卷。这与相应的废物息息相关,这导致了更高的材料成本。此外,还有直接的过程,尤其是纤维喷涂过程。直接生产三维长纤维预成型的有前途的方法,而没有二维半固定产品的中间步骤是纤维注入成型过程。该过程允许生产三维形成的长纤维半生产产品,而不会通过通过空气流将纤维吹入封闭的模具中,而无需切割废物。该过程有可能局部调整纤维结构的密度。使用纤维注射成型作为预制过程的一种障碍是迄今为止可实现的纤维结构的统一性,这导致了随后的浸润过程中的问题。在使用纤维注射塑造过程中,用于经济制造的预成型,因此必须改善制造预制的均匀性。根据显示的初步工作,特别是对气流的注射过程将进行更详细的研究。尽管由纤维bun的形成引起的不结合纤维体积流量,但通过均匀填充注射模具来实现更均匀的特性。因此,目的是通过控制与注射过程相关的参数来积极影响该过程,以实现均匀的纤维沉积。计划的研究应为理解注射参数与所得的预成型特性之间的相互作用做出重大贡献,尤其是均匀性。

项目成果

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Professor Dr.-Ing. Jürgen Fleischer其他文献

Professor Dr.-Ing. Jürgen Fleischer的其他文献

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{{ truncateString('Professor Dr.-Ing. Jürgen Fleischer', 18)}}的其他基金

Enabling the ARBURG Freeforming process for industrial production of metallic components
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    443103294
  • 财政年份:
    2020
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Joining of intrinsically manufactured frp/metal components to metallic structural elements by resistance spot welding
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  • 批准号:
    418238897
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    2019
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    --
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Additively manufactured temperature sensitive actuators made of shape memory wire reinforced polymer structures
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    422469945
  • 财政年份:
    2019
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    --
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    Research Grants
Modeling for the sensor based gripping and separation of textile semi-finished productswith vacuum grippers
基于传感器的真空夹具对纺织半成品的抓取和分离建模
  • 批准号:
    397485737
  • 财政年份:
    2018
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Model-based assembly optimization for the automation of electric drive production with minimum unbalance
基于模型的装配优化,实现电力驱动生产自动化,实现最小不平衡
  • 批准号:
    350459107
  • 财政年份:
    2017
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    --
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Semi-active component for chatter suppression of metal cutting machine tools
用于金属切削机床颤振抑制的半主动元件
  • 批准号:
    329109043
  • 财政年份:
    2017
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Methodology for a near net shape, wrinkle-free production of textile preforms by using a segment based die draping
使用基于分段的模具悬垂技术近净形状、无皱生产纺织预成型件的方法
  • 批准号:
    377740863
  • 财政年份:
    2017
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Extension of durability theory through correlation of wear with acoustic emission to the characteristic values of the ball screw drive
通过将磨损与声发射与滚珠丝杠传动装置的特征值相关联来扩展耐用性理论
  • 批准号:
    388141462
  • 财政年份:
    2017
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Process modeling of linear coil winding processes with a subsequent deformation model
使用后续变形模型对线性线圈缠绕过程进行过程建模
  • 批准号:
    273536303
  • 财政年份:
    2015
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Process model for the tool-free production of metallic components with the Arburg Freeforming Process
使用阿博格自由成型工艺免工具生产金属部件的工艺模型
  • 批准号:
    274091127
  • 财政年份:
    2015
  • 资助金额:
    --
  • 项目类别:
    Research Grants

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