Process and equipment for manufacture of advanced composite structures
View Patent ↗A process for continuous, tailored lamination of aligned composite materials in such a way that either pre-formed or pre-consolidated sheets are made available for subsequent infusion molding or stamping processes, the process comprising the steps of: material placement, consolidation/stabilization, cut and kit, fabrication, and final trim. A tailored blank machine is also described. The blank machine includes a series of material placement heads arranged in a linear or serial fashion along a single moving placement table, wherein each head lays down a single angle of the prescribed stacking sequence as the conveyer passes under the head at a constant speed wherein the angle is proportional to head traverse rate divided by conveyer speed.
1. A tailored blank comprising a first group of fibers and a second group of fibers, the tailored blank obtained by carrying out a process comprising:
providing a first relative displacement between a dispensing head and a table while dispensing through the dispensing head onto the table the first group of fibers, such that the first group of fibers is aligned in a direction determined by the first relative displacement;
turning the dispensing head on and off to intermittently dispense the first group of fibers;
providing a second relative displacement between the dispensing head and the table while dispensing through the dispensing head onto the first group of fibers the second group of fibers, such that the second group of fibers is dispensed at an angle to the direction, the angle determined by the second relative displacement; and
turning the dispensing head on and off to intermittently dispense the second group of fibers,
the intermittent dispensing of the first group of fibers and the second group of fibers forming an opening in the tailored blank, wherein ends of fibers of the second group of fibers form an edge of the opening.
2. The tailored blank of claim 1 , the process further comprising consolidating the first group of fibers and the second group of fibers.
3. The tailored blank of claim 1 , the process further comprising dispensing a matrix material along with the first group of fibers and the second group of fibers.
4. The tailored blank of claim 1 , the first group of fibers comprising one of glass, aramid, carbon fiber preimpregnated tape, preimpregnated carbon tow, binderized discontinuous carbon fiber tow, binderized fabric strips comprised of discontinuous carbon fiber tow, and continuous carbon fiber tow.
5. The tailored blank of claim 1 , the process further comprising applying, by ink jet, fabrication instructions to the tailored blank, the fabrication instructions disclosing a process by which to form the tailored blank into a composite part.
6. The tailored blank of claim 1 , the process further comprising dispensing a binder along with the first group of fibers and the second group of fibers.
7. The tailored blank of claim 1 , further comprising dispensing the first group of fibers through the dispensing head onto a substantially planar surface of the table,
wherein the first group of fibers forms a first substantially flat sheet, wherein the second group of fibers forms a second substantially flat sheet, and wherein the tailored blank is substantially flat.
8. The tailored blank of claim 1 , wherein the edge comprises a curve.
9. The tailored blank of claim 1 , wherein the opening in the tailored blank has at least one non-right angle between adjacent sides of the opening.
10. A tailored blank comprising a first group of fibers and a second group of fibers, the tailored blank obtained by carrying out a process comprising:
providing a first relative displacement between a dispensing head and a table while dispensing through the dispensing head onto the table the first group of fibers, such that the first group of fibers is aligned in a direction determined by the first relative displacement;
turning the dispensing head on and off to intermittently dispense the first group of fibers;
providing a second relative displacement between the dispensing head and the table while dispensing through the dispensing head onto the first group of fibers the second group of fibers, such that the second group of fibers is dispensed at an angle to the direction, the angle determined by the second relative displacement; and
turning the dispensing head on and off to intermittently dispense the second group of fibers,
the intermittent dispensing of the first group of fibers and the second group of fibers forming an opening in the tailored blank having at least one nonlinear side.
11. A tailored blank comprising a first group of fibers and a second group of fibers, the tailored blank obtained by carrying out a process comprising:
providing a first relative displacement between a dispensing head and a table while dispensing through the dispensing head onto the table the first group of fibers, such that the first group of fibers is aligned in a direction determined by the first relative displacement;
turning the dispensing head on and off to intermittently dispense the first group of fibers;
providing a second relative displacement between the dispensing head and the table while dispensing through the dispensing head onto the first group of fibers the second group of fibers, such that the second group of fibers is dispensed at an angle to the direction, the angle determined by the second relative displacement; and
turning the dispensing head on and off to intermittently dispense the second group of fibers,
the intermittent dispensing of the first group of fibers and the second group of fibers forming an opening in the tailored blank having at least one non-right angle between adjacent sides of the opening.
12. A tailored blank comprising a first group of fibers and a second group of fibers, the tailored blank obtained by carrying out a process comprising:
providing a first relative displacement between a dispensing head and a table while dispensing through the dispensing head onto the table the first group of fibers, such that the first group of fibers is aligned in a direction determined by the first relative displacement;
turning the dispensing head on and off to intermittently dispense the first group of fibers;
providing a second relative displacement between the dispensing head and the table while dispensing through the dispensing head onto the first group of fibers the second group of fibers, such that the second group of fibers is dispensed at an angle to the direction, the angle determined by the second relative displacement; and
turning the dispensing head on and off to intermittently dispense the second group of fibers,
the intermittent dispensing of the first group of fibers and the second group of fibers forming an opening in the tailored blank, wherein the opening is shaped as a polygon having sides of at least three different lengths.
13. A tailored blank comprising a first group of fibers and a second group of fibers, the tailored blank obtained by carrying out a process comprising:
providing a first relative displacement between a dispensing head and a table while dispensing through the dispensing head onto the table the first group of fibers, such that the first group of fibers is aligned in a direction determined by the first relative displacement;
turning the dispensing head on and off to intermittently dispense the first group of fibers;
providing a second relative displacement between the dispensing head and the table while dispensing through the dispensing head onto the first group of fibers the second group of fibers, such that the second group of fibers is dispensed at an angle to the direction, the angle determined by the second relative displacement; and
turning the dispensing head on and off to intermittently dispense the second group of fibers,
the intermittent dispensing of the first group of fibers and the second group of fibers forming pad-ups in the tailored blank having thicknesses greater than remaining areas of the tailored blank.
14. The tailored blank of claim 13 , the process further comprising consolidating the first group of fibers and the second group of fibers.
15. The tailored blank of claim 13 , the process further comprising dispensing a matrix material along with the first group of fibers and the second group of fibers.
16. The tailored blank of claim 13 , the first group of fibers comprising one of glass, aramid, carbon fiber preimpregnated tape, preimpregnated carbon tow, binderized discontinuous carbon fiber tow, binderized fabric strips comprised of discontinuous carbon fiber tow, and continuous carbon fiber tow.
17. The tailored blank of claim 13 , the process further comprising applying, by ink jet, fabrication instructions to the tailored blank, the fabrication instructions disclosing a process by which to form the tailored blank into a composite part.
18. The tailored blank of claim 13 , the process further comprising dispensing a binder along with the first group of fibers and the second group of fibers.
19. The tailored blank of claim 13 , further comprising dispensing the first group of fibers through the dispensing head onto a substantially planar surface of the table,
wherein the first group of fibers forms a first substantially flat sheet, wherein the second group of fibers forms a second substantially flat sheet, and wherein the tailored blank is substantially flat.
20. The tailored blank of claim 13 , the intermittent dispensing of the first group of fibers and the second group of fibers forming an opening in the tailored blank, wherein ends of fibers of the second group of fibers form an edge of the opening.