The invention relates to a method for depositing one- or two-dimensional fiber structures in order to form a two- or three-dimensional fiber structure, in particular a fiber structure in the form of a fiber-reinforced plastic (FRP) or FRP semi-finished product, using a production machine including a
The invention relates to a method for depositing one- or two-dimensional fiber structures in order to form a two- or three-dimensional fiber structure, in particular a fiber structure in the form of a fiber-reinforced plastic (FRP) or FRP semi-finished product, using a production machine including at least one depositing device and at least one fiber support. The one- or two-dimensional fiber structures have at least one unidirectional fiber layer. The depositing device deposits the one- or two-dimensional fiber structures onto the fiber support in a depositing direction in a controlled manner such that the fiber directions of the deposited one- or two-dimensional fiber structures assume an angle α20°, preferably α60°, and a maximum of α=90°, relative to the depositing direction. The one- or two-dimensional fiber structures are deposited on the fiber support in a substantially tension-free manner with respect to the fiber direction of the fiber structures.
대표청구항▼
1. A method for depositing 2 dimensional fiber structures in order to form a 3 dimensional fiber structure, in the form of a fiber reinforced plastic (FRP) or a FRP semi-finished product, the method comprising the steps of: providing at least one depositing device and at least one fiber support, whe
1. A method for depositing 2 dimensional fiber structures in order to form a 3 dimensional fiber structure, in the form of a fiber reinforced plastic (FRP) or a FRP semi-finished product, the method comprising the steps of: providing at least one depositing device and at least one fiber support, wherein said 2 dimensional fiber structures include at least one unidirectional fiber layer;placing said 2 dimensional fiber structures by said depositing device onto said fiber support in a direction of placement in such a way that fiber directions of the deposited 2 dimensional fiber structures assumes an angle α>20° relative to the direction of placement; anddepositing said 2 dimensional fiber structures substantially free of a tension in the fiber direction onto the fiber support, such that said 2 dimensional fiber structures are held on the at least one depositing device by a suction force in the at least one depositing device and the suction force is less in a deposit region, wherein said 2 dimensional fiber structures are deposited alternately offset laterally, positioned transversely to the direction of placement, to each other on the fiber support, so that a respective end of the 2 dimensional fiber structures does not come to rest in a straight line. 2. The method according to claim 1, wherein said angle α has a range from 21° to a maximum of 90°. 3. The method according to claim 1, wherein said 2 dimensional fiber structures exhibit at least one characteristic of: consisting of at least one unidirectional fiber layer; andbeing arranged as at least one multi-axial laid structure. 4. The method according to claim 1, wherein said fiber support includes at least one of: a first compression mold half with a surface profile which is configured for structuring said 3 dimensional fiber structure in a consolidation process;a suction device which generates a suction force in the fiber support that can hold said 2 dimensional fiber structures on the fiber support; anda first conveyor which can transport said 2 dimensional fiber structures further in a direction of belt travel, after having been deposited, wherein said 2 dimensional fiber structures can be deposited by the depositing device by at least one of depositing directly onto said first conveyor and depositing wherein a direction of travel of said first conveyor can be oriented at a predetermined angle β to a direction of travel of at least one additional conveyor. 5. The method according to claim 4, wherein said depositing device includes at least one of: a positioning device that can variably set said angles α by positioning the depositing device relative to the fiber support;a propulsion device that can move the depositing device forward in the direction of placement while depositing said 2 dimensional fiber structures;a suction device which can generate a suction force in the depositing device to hold the 2 dimensional fiber structures on the depositing device; andat least one second conveyor belt which can transport said 2 dimensional fiber structures in a direction of belt travel for depositing onto the fiber support, wherein a direction of belt travel of at least one second conveyor belt is oriented by at least one of a predetermined angle δ relative to a direction of belt travel of at least one additional second conveyor belt and wherein the direction of travel of at least one second conveyor belt is oriented at a predetermined angle γ to the direction of travel of at least one first conveyor belt. 6. The method according to claim 5, wherein said method further includes at least one: adjusting an adhesion force holding said 2 dimensional fiber structures on the depositing device such that a respective adhesion force at the depositing device is smaller than a respective adhesion force at the fiber support;lowering an adhesion force on the depositing device during at least one of a time of deposit and in a deposit region; andincreasing an adhesion force on the fiber support during at least one of a time of deposit and in a deposit region. 7. The method according to claim 1, wherein said 2 dimensional fiber structures are held relative to each other by a fixing device throughout at least one of after and during depositing the 2 dimensional fiber structures onto the fiber support. 8. The method according to claim 7, wherein said 2 dimensional fiber structures are held on the fiber support by said fixing device throughout at least one of after and during depositing the 2 dimensional fiber structures onto the fiber support. 9. The method according to claim 8, wherein the fixing device includes at least one of: a second compression mold half with a surface profile which is complimentary to a first compression mold half and which is configured for profiling said 3 dimensional fiber structure in a consolidation process; anda spraying device which bonds said 2 dimensional fiber structures together through spraying with at least one of a binding agent and a matrix material. 10. The method according to claim 9, wherein the fixing device includes a compression device having at least one roller, wherein the roller has a diameter of between 10 and 100 mm. 11. The method according to claim 1, wherein said method further includes a step of depositing a plurality of strips of said 2 dimensional fiber structures on the fiber support one after another and adjacent to one another.
Reuβmann, Thomas; Lützkendorf, Renate; Ortlepp, Gerald, Method for the continuous production of laid staple fibre fabrics from finitely long reinforcing fibres with aligned fibre orientation.
Peters Thomas E. (Boise ID) Logan James D. (Pullman WA) Bennett Eugene R. (Boise ID) Dieter Clarence L. (Boise ID) Henckel David J. (Boise ID), Oriented chopped fiber mats and method and apparatus for making same.
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