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 method for continuously making a tailored blank comprising a first group of fibers and a second group of fibers, the method 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.
2. The method of claim 1 , further comprising separating the tailored blank from the table.
3. The method of claim 1 , further comprising consolidating the first group of fibers and the second group of fibers with a matrix material.
4. The method of claim 3 , the matrix material comprising one of a thermoplastic resin and a thermoset resin.
5. The method of claim 1 , further comprising rotating the dispensing head while dispensing the first group of fibers.
6. The method of claim 1 , the providing of the first relative displacement comprising moving the table in a machine direction and moving the dispensing head in a direction transverse to the machine direction.
7. The method of claim 1 , further comprising dispensing a matrix material along with the first group of fibers and the second group of fibers.
8. The method of claim 1 , the intermittent dispensing of the first group of fibers and the second group of fibers forming an opening in the tailored blank.
9. The method of claim 1 , the providing of the first relative displacement comprising moving at least one of the dispensing head and the table.
10. The method 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.
11. The method of claim 1 , further comprising kitting the tailored blank into a predefined bin.
12. The method of claim 1 , further comprising applying fabrication instructions to the tailored blank, the fabrication instructions disclosing a process by which to form the tailored blank into a composite part.
13. The method of claim 1 , further comprising dispensing a binder along with the first group of fibers and the second group of fibers.