Methods for forming composite housing frames
Electronic device frames may be formed from fiber composites. Carbon fiber material may be formed into frame members using pultrusion tools. Notches may be machined into the frame members. The machined frame members may be assembled to form a rectangular frame assembly using lap joints. Fiber tape may be wound around the periphery of the frame assembly. Following curing, additional parts such as a metal blank may be bonded to the frame assembly and machined.
1. A method for forming an electronic device frame, comprising:
forming frame members;
assembling the frame members to form a rectangular frame assembly for an electronic device; and
with a winding tool, winding fiber tape around the rectangular frame assembly,
wherein the fiber tape is formed from a continuous piece of binder preimpregnated tape wrapped around the winding tool.
2. The method defined in claim 1 wherein forming the frame members comprises forming elongated frame members with a pultrusion tool.
3. The method defined in claim 1 wherein forming the frame members comprises forming carbon fiber frame members.
4. The method defined in claim 3 wherein assembling the frame members comprises attaching the frame members to each other using lap joints and adhesive.
5. The method defined in claim 4 further comprising forming notches at ends of the frame members.
6. The method defined in claim 5 further comprising heating the frame members of the rectangular frame assembly and the wound fiber tape to form a unitary fiber composite frame structure.
7. The method defined in claim 6 further comprising attaching a metal blank to the unitary fiber composite frame structure.
8. The method defined in claim 7 further comprising machining the metal blank.
9. The method defined in claim 8 further comprising machining the unitary fiber composite frame structure.
10. The method defined in claim 1 , further comprising attaching a metal blank to at least one of the frame members forming the rectangular frame assembly.
11. The method defined in claim 10 , wherein the attaching of the metal blank comprises bonding an aluminum blank to the at least one of the frame members forming the rectangular frame assembly using adhesive.
12. the method defined in claim 1 , wherein the frame members forming the rectangular frame assembly each include a longitudinal axis.
13. The method defined in claim 12 , wherein the winding of the fiber tape around the rectangular frame assembly comprises:
coupling the fiber tape to one of, a distinct frame member forming the rectangular frame assembly, or fiber tape wound around the distinct frame member forming the rectangular frame assembly,
wherein the fiber tape is in parallel alignment with the longitudinal axis of the distinct frame member forming the rectangular frame assembly.
14. The method defined in claim 1 , further comprising curing at least one of the fiber tape, and the frame members forming the rectangular frame assembly.
15. The method defined in claim 1 , wherein the substantially rectangular frame assembly for the electronic device includes substantially rounded corners.
16. A method for forming an electronic device frame, comprising:
forming carbon fiber frame members;
forming notches at ends of the carbon fiber frame members;
assembling the carbon fiber frame members to each other using lap joints and adhesive to form a frame assembly; and
with a winding tool, winding fiber tape around the frame assembly.
17. The method defined in claim 16 further comprising heating the frame members of the frame assembly and the wound fiber tape to form a unitary fiber composite frame structure.
18. The method defined in claim 17 further comprising attaching a metal blank to the unitary fiber composite frame structure.
19. The method defined in claim 18 further comprising machining the metal blank.
20. The method defined in claim 17 further comprising machining the unitary fiber composite frame structure.