IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0530607
(2008-03-13)
|
등록번호 |
US-8568549
(2013-10-29)
|
우선권정보 |
DE-10 2007 012 608 (2007-03-13); DE-10 2008 012 255 (2008-03-03) |
국제출원번호 |
PCT/EP2008/053047
(2008-03-13)
|
§371/§102 date |
20090923
(20090923)
|
국제공개번호 |
WO2008/110614
(2008-09-18)
|
발명자
/ 주소 |
- Meyer, Oliver
- Geβler, Andreas
|
출원인 / 주소 |
|
대리인 / 주소 |
Global IP Counselors, LLP
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
10 |
초록
▼
The invention relates to a process and a device for manufacturing a perform (42) for a load path aligned fiber composite structure. The process includes cutting off relatively short fiber band pieces (40, 40′, 40″) from a spread fiber band (14), placing the fiber band pieces (40, 40′, 40″) at a pred
The invention relates to a process and a device for manufacturing a perform (42) for a load path aligned fiber composite structure. The process includes cutting off relatively short fiber band pieces (40, 40′, 40″) from a spread fiber band (14), placing the fiber band pieces (40, 40′, 40″) at a predetermined position and fixing them at this position by means of a binder material (38).
대표청구항
▼
1. A method for manufacturing a preform for a load path aligned fiber composite structure, comprising the following order of steps: a first step of providing a flat fiber band in a feeding direction;a second step of cutting off a fiber band piece from a free end of the flat fiber band such that the
1. A method for manufacturing a preform for a load path aligned fiber composite structure, comprising the following order of steps: a first step of providing a flat fiber band in a feeding direction;a second step of cutting off a fiber band piece from a free end of the flat fiber band such that the fiber band piece includes a cantilevered free edge of the free end, the cantilevered free edge being a leading edge of the flat fiber band in the feeding direction and being transverse to the feeding direction;a third step of picking up the fiber band piece at a predetermined pickup position by a laying device;a fourth step of placing the fiber band piece at a predefined position;a fifth step of fixing the fiber band piece by a binder material,the second to fourth steps being repeated to place and to fix additional fiber band pieces at other predefined positions, andthe third and fourth steps being carried out by a laying head of the laying device, the laying head moving from the at least one pickup position to a first predefined position to place a first fiber band piece and back to the one or to one of several predetermined pickup positions to pick up a second fiber band piece and then to a second predefined position to place the second fiber band piece. 2. The method according to claim 1, wherein a binder material activated by heat is used and the cut-off fiber band piece is heated in the fifth step. 3. The method according to claim 2, wherein the laying head is heated during movement between the pickup position and the predefined position to activate the binder material. 4. The method according to claim 1, wherein in the fourth step, the fiber band piece is pressed against a portion of a forming surface for the preform to give the fiber band piece a three-dimensional surface architecture. 5. The method according to claim 4, wherein the pressing against the portion of the forming surface is carried out by an elastically deformable receiving surface of the laying head with the fiber band piece being held to and in a condition lying flat against the receiving surface while being laid and being pressed. 6. The method according to claim 1, wherein in the second step, the fiber band piece that is cut off is less than less than 10 cm. 7. The method according to claim 1, wherein the fiber band piece is pneumatically held against the laying head while being laid. 8. The method according to claim 1, wherein in the fourth step, the placed fiber band piece is released from the laying head by a pneumatic pulse. 9. The method according to claim 1, further comprising transferring the fiber band piece from a cutting device used in the second step to the pickup position of the laying device after the second step and before the third step. 10. The method according to claim 9, wherein a transfer speed when transferring the fiber band piece after the second step and before the third step is higher than a conveying speed of the flat fiber band to separate subsequently fiber band pieces that have been cut off from each other. 11. The method according to claim 9, wherein the fiber band piece is pneumatically held against a band-conveyor to be transferred. 12. The method according to claim 11, wherein the fiber band piece is delivered from the band-conveyor to the laying head through a pneumatic pulse. 13. The method according to claim 1, wherein fiber band pieces are placed with their fiber direction oriented along predefined curved paths. 14. The method according to claim 1, wherein a different number of fiber band pieces are placed on different sections of the preform to achieve different fiber contents in the sections of the preform. 15. The method according to claim 1, wherein in the second step, the fiber band piece is respectively cut along an arc-shaped cutting line. 16. The method according to claim 15, wherein when repeating the fourth step, fiber band pieces are placed one behind the other without overlapping with mutually complementary circular arc-shaped cutting edges. 17. The method according to claim 1, wherein the first step includes spreading a bundle of fiber filaments into a flat fiber band. 18. The method according to claim 17, further comprising applying the binder material to the fiber filaments after the spreading of the bundle fiber filaments into a flat fiber band and before the fourth step. 19. The method according to claim 18, wherein applying the binder material to the fiber filaments is carried out prior to the second step. 20. The method according to claim 17, wherein in the first step, filaments of a carbon roving are spread. 21. The method according to claim 1, wherein the first step includes providing a flat fiber band from a semi-product pre-impregnated with a binder material. 22. The method according to claim 21, wherein the pre-impregnated semi-product is a prepreg. 23. The method according to claim 22, wherein at least the second and third steps are carried out at a temperature below 10° C. 24. The method according to claim 21, wherein the pre-impregnated semi-product is a thermoplastic tape. 25. The method according to claim 21, wherein the pre-impregnated semi-product is made of a pre-impregnated fiber fabric. 26. The method according to claim 25, wherein the fiber fabric is made from fibers oriented in at least two different directions. 27. The method according to claim 25, wherein providing a flat fiber band from a semi-product pre-impregnated with a binder material includes cutting of the pre-impregnated fiber fabric into a band shape. 28. The method according to claim 21, wherein a semi-finished product is used that is impregnated with a binder material configured to be activated by a temperature change and the cut-off fiber band piece is heated and/or cooled. 29. The method according to claim 1, wherein the second step includes cutting across a complete width of the fiber band to cut off the fiber band piece from the free end of the fiber band. 30. The method according to claim 1, wherein the fiber band piece and the additional fiber band pieces have equal widths that are equal to a width of the fiber band.
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