Composite preforms with groves for fibers and groves for off-gassing

• US 5,431,984 A
• Filed: 12/11/1990
• Issued: 07/11/1995
• Est. Priority Date: 12/11/1990
• Status: Expired due to Term

• Current Assignee: Textron IPMP L.P
• Original Assignee: Avco Corporation (Textron Inc)
• Inventors: Keck, Steven D., Woods, Harlan L.
• Primary Examiner(s): Ryan, Patrick J.
• Assistant Examiner(s): Weisberger, Richard C.
• Application Number:
  US07/625,479
• Time in Patent Office: 1,673 Days
• Field of Search: 428/37, 428/64, 428/65, 428/225, 428/246, 428/67, 428/174, 428/5, 428/181, 428/182, 428/220.4, 428/457, 428/604, 156/169, 156/252, 29/419.1
• US Class Current: 428/175
• CPC Class Codes: B22F 2003/1046 with separating means for articles to be sintered
• CPC Class Codes: B22F 2998/00 Supplementary information concerning processes or compositions relating to powder metallurgy
• CPC Class Codes: B29C 70/46 using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs
• CPC Class Codes: B29C 70/543 Fixing the position or configuration of fibrous reinforcements before or during moulding for non-woven fabrics D04H3/08
• CPC Class Codes: B32B 15/01 all layers being exclusively metallic making layered metal workpieces by pressure cladding B23K20/22; making coatings with a metallic material characterised by its composition C23C30/00
• CPC Class Codes: B32B 15/14 next to a fibrous or filamentary layer
• CPC Class Codes: B32B 3/08 characterised by added members at particular parts layer formed of separate pieces of material which are juxtaposed side-by-side B32B3/14, B32B3/18
• CPC Class Codes: B32B 3/30 characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs apertured layer B32B3/266; layer with cavities or internal voids B32B3/26
• CPC Class Codes: C04B 2237/365 Silicon carbide
• CPC Class Codes: C04B 2237/64 Forming laminates or joined articles comprising grooves or cuts
• CPC Class Codes: C04B 2237/76 Forming laminates or joined articles comprising at least one member in the form other than a sheet or disc, e.g. two tubes or a tube and a sheet or disc
• CPC Class Codes: C04B 2237/88 Joining of two substrates, where a substantial part of the joining material is present outside of the joint, leading to an outside joining of the joint
• CPC Class Codes: C04B 35/63424 Polyacrylates; Polymethacrylates
• CPC Class Codes: C04B 35/645 Pressure sintering
• CPC Class Codes: C04B 37/008 by means of an interlayer consisting of an organic adhesive, e.g. phenol resin or pitch
• CPC Class Codes: C22C 29/00 Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides C22C26/00 takes precedence
• CPC Class Codes: C22C 47/00 Making alloys containing metallic or non-metallic fibres or filaments
• CPC Class Codes: C22C 47/064 Winding wires
• CPC Class Codes: C22C 47/20 by subjecting to pressure and heat an assembly comprising at least one metal layer or sheet and one layer of fibres or filaments
• CPC Class Codes: Y10T 156/1056 Perforating lamina
• CPC Class Codes: Y10T 29/49801 : Shaping fiber or fibered material
• CPC Class Codes: Y10T 428/12417 : Intersecting corrugating or dimples not in a single line [e.g., waffle form, etc.]
• CPC Class Codes: Y10T 428/22 : Nonparticulate element embedded or inlaid in substrate and visible
• CPC Class Codes: Y10T 428/24628 : Nonplanar uniform thickness material
• CPC Class Codes: Y10T 428/24636 : Embodying mechanically interengaged strand[s], strand-portion[s] or strand-like strip[s] [e.g., weave, knit, etc.]
• CPC Class Codes: Y10T 428/24686 : Pleats or otherwise parallel adjacent folds
• CPC Class Codes: Y10T 428/24694 : Parallel corrugations
• CPC Class Codes: Y10T 428/31678 : Of metal

Abstract

The invention is directed to composite preforms which comprise reinforcing fiber deposited in grooves pre-formed in a metal or ceramic foil.

Claims

1. A composite preform comprising:

foil having an edge and a first groove and a second groove defined therein, said second groove running from said first groove to the edge of the foil; and

filamentary reinforcement positioned within the first groove.

2. Composite preform as defined in claim 1 in which the groove is dimensionally equal in depth and width.

3. A composite preform as defined in claim 1 which includes a fugitive binder holding the filamentary reinforcement in the groove.

4. A composite preform as defined in claim 1 where the filamentary reinforcement is a continuous length.

5. A composite preform defined in claim 1 where the groove is in the shape of an archimedean spiral.

6. The composite preform of claim 1 additionally comprising means for holding the reinforcement within the groove.

7. A composite preform as defined in claim 6 wherein the means for holding the reinforcement in the groove comprises a fugitive binder.

8. The composite preform of claim 1 wherein the foil is annular.

9. A composite preform comprising:

a plurality of foils configured into a predetermined structural shape, each of said foils having a groove defined therein containing fiber reinforcement and off-gassing means comprising a second groove formed in the foil.

10. The composite preform of claim 9 wherein the off-gassing means comprises a plurality of grooves in the foil extending at least from the groove to an edge of the foil.

11. The composite preform of claim 9 wherein each foil is annular and the foils are stacked one on top of the other.

12. The composite preform of claim 9 wherein the grooves in a first portion of the plurality of the foils are shaped differently than the grooves in a second portion of the plurality.

13. A composite preform comprising:

(a) a foil having a groove defined therein, said groove shaped as an archimedial spiral; and

(b) a continuous monofilament disposed in said spiral groove.

14. The composite preform of claim 13 wherein the foil has formed therein a plurality of grooves extending radially through the spiral groove.