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Method for producing in a tfp method one-or multi-layer layer fibre preforms and a support layer

A multi-layer fiber and preform technology, which is used in the field of producing single-layer or multi-layer fiber preforms and cushion layers through the TFP process, can solve problems such as fiber bundle damage, and achieve the effect of easy detachment or separation

Inactive Publication Date: 2008-07-23
AIRBUS OPERATIONS GMBH
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AI Technical Summary

Problems solved by technology

[0011] DE10061028A1 indeed discloses a method of chemically dissolving or thermally melting the fixing filaments in the fiber preform, but here there is a risk that the fiber bundles will be damaged as a result of tearing off the sewing substrate

Method used

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  • Method for producing in a tfp method one-or multi-layer layer fibre preforms and a support layer

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Embodiment Construction

[0065] The method according to the invention and the backing layer according to the invention will be explained in more detail with reference to FIGS. 1 and 2 .

[0066] Figure 1 shows a cross-sectional view through a fiber preform with a release layer formed by the TFP process.

[0067] The fiber preform 1 has a backing layer 2 therein and a release layer 3 arranged on the backing layer 2 . The release layer 3 is formed, for example, by a thin-layer PTFE film or the like having good non-stick properties.

[0068] In addition, the release layer 3 can also be formed by a film of other polymers (such as polyethylene, polypropylene, etc.) with good non-stick properties. Furthermore, the release layer can be formed by a sheet-like form, for example textile fibers, provided with a release agent, such as a release coating or the like. The release layer 3 can optionally be produced by spraying or applying a non-stick material onto the backing layer 2 , so that in this case the rele...

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Abstract

The invention relates to a method for the production of single or multilayer fiber preforms using the TFP process by means of fiber bundles (4-16), approximately arranged so that they are oriented by force flow and placed on a backing layer ( 2) and connected by fixing wires (17) in order to form a fiber preform (1, 25) with the desired material thickness without affecting the backing layer (2). According to the invention, the release layer (3, 26) is applied to the backing layer (2) at least in certain regions, and when the TFP process is completed, the fiber preform (1, 25) is introduced into the holding device (24) , wherein at least some of the fixing filaments (17) are melted by supplied heat, and then, the backing layer (2) separated from the fiber preform (1, 25) by the release layer (3, 26) is separated from the fiber preform (1 , 25) Break away. The fiber preforms (1, 25) formed by the method according to the invention have an optimal fiber structure without cracks for practically any desired material thickness and are destined for the compounding of load-bearing parts which have to withstand high mechanical loads Production of components. The invention also relates to a bedding layer for the production of a fiber preform (1, 25), and to a fiber preform (1, 25) formed according to the method of the invention.

Description

technical field [0001] The present invention relates to a method for the production of single- or multi-layer fiber preforms by the TFP process ("Tailored Fiber Arrangement") with fiber bundles approximately arranged such that they are oriented by force flow and placed on on the backing layer and connected by fixing wires, in particular, by at least one upper fixing wire and at least one lower fixing wire, so as to form a fiber preform having the actual required material thickness. [0002] The invention also relates to a backing layer for carrying out the method. Background technique [0003] In lightweight construction, in particular in aircraft construction, the use of composite components made of fiber-reinforced plastics, which can withstand extremely high mechanical loads and, at the same time, have great potential for saving weight, is increasingly being used. These parts are formed with reinforcing fibers that are continuously impregnated or impregnated with a curab...

Claims

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Application Information

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IPC IPC(8): B29C70/54B29C70/48B29B11/16B29K105/10D04H13/00
CPCB29B11/16B29C37/0075B29C70/20B29C70/342B29C70/48B29C70/543B29K2105/0097B32B5/08B32B5/12B32B5/26B32B27/08B32B27/12B32B27/322B32B2262/0215B32B2605/18D04H13/00
Inventor 保罗·约恩乌尔里希·艾贝特
Owner AIRBUS OPERATIONS GMBH
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