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

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...

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