Fiber application head including a segmented compaction roller
A fiber application head for a fiber application machine for the production of parts made of composite materials, comprising a compacting roller, said compacting roller comprising several independent roller segments mounted side by side on an axial rod. Each roller segment comprises a tubular central portion through which said segment is mounted on the axial rod, a tubular peripheral portion having a cylindrical outer surface and one or more curved spring plate arranged between the outer surface ( 31 a ) of the central portion and the inner surface of the peripheral portion.
1. A fiber application head for a fiber application machine, comprising a compacting roller, said compacting roller comprising a plurality of independent roller segments mounted side by side on an axial rod, wherein each roller segment comprises
a tubular central portion through which said segment is mounted on the axial rod,
a tubular peripheral portion, having a cylindrical outer surface and
one or more curved spring plate arranged between the outer surface of the tubular central portion and an inner surface of the peripheral portion.
2. The head according to claim 1 , wherein the convex surface of the spring plate is directed outwards.
3. The head according to claim 1 , wherein each spring plate extends substantially tangentially from the outer surface of the central portion, and/or substantially tangentially from the inner surface of the peripheral portion.
4. The head according to claim 1 , wherein each spring plate is fixed to the tubular central portion.
5. The head according to claim 1 , wherein each segment is rotatably mounted on the axial rod.
6. The head according to claim 1 , wherein each roller segment comprises a plurality of curved spring plates.
7. The head according to claim 6 , wherein each curved spring plate extends over at least one third of a turn of the perimeter of the peripheral portion.
8. The head according to claim 1 , wherein each segment comprises a single spring plate having more than one coil.
9. The head according to claim 1 , wherein the curved spring plate or plates are fixed to the central portion, so that the central portion and the plate or plates are formed in one-piece.
10. The head according to claim 9 , wherein each spring plate extends tangentially from the tubular central portion, said tubular central portion having a substantially circular hole at the junction of the spring plate to the central portion in order to reduce stress concentrations at said junction.
11. The head according to claim 1 , wherein each spring plate is formed of a separate part from those forming the tubular central portion and the peripheral portion.
12. The head according to claim 1 , wherein the peripheral portion is formed of a separate part from that of the tubular central portion.
13. The head according to claim 1 , wherein each spring plate curved is fixed by a first end to the outer surface of the central portion, each plate coming against the inner surface of the peripheral portion and being able to slide against the latter.
14. The head according to claim 9 , wherein for each segment, the peripheral portion, the central portion and the spring plate or plates are formed in one-piece, the plate or plates being obtained by performing one or more cuts in a disk of rigid material.
15. The head according to claim 1 , wherein each segment comprises a stop means able to limit the radial displacement of the peripheral portion relative to the tubular central portion.
16. The head according to claim 13 , wherein the stop means comprises for each segment at least one disk able to abut against a circular portion of the inner surface of the peripheral portion.
17. A fiber application machine comprising a fiber application head comprising a compacting roller and means for guiding the fibers onto said application roller, wherein it comprises a head according to claim 1 .