# US 8,771,823 B2 · Thermoplastic part, tool and method for the manufacturing thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,771,823 B2 - Document ID: US8771823B2 - Status: Granted - Kind: B2 - Application number: 11/776,878 - Filed: 2007-07-12 - Published: 2008-01-17 - Granted: 2014-07-08 - Earliest claimed: 2006-07-14 - Assignees: Huchinson Aéronautique & Industrie Limitée; Hutchinson Aerospace & Industry Limited - Applicants: Martin Lévesque; Marc Grenier; Jonathan Gagnon - Inventors: Martin Lévesque; Marc Grenier; Jonathan Gagnon - Web page: https://patentgrep.com/patent/US8771823B2 ## CPC - B29C 51/085: {with at least one of the shaping surfaces being made of resilien material, e.g. rubber} - B29C 51/145: {having at least one layer of textile or fibrous material combined with at least one plastics layer} - B29C 51/262: {Clamping means for the sheets, e.g. clamping frames} - B29C 51/28: for applying pressure through the wall of an inflated bag or diaphragm - B32B 7/027: Thermal properties - B32B 27/12: next to a fibrous or filamentary layer - B29C 2791/006: Using vacuum - B29C 2791/007: Using fluid under pressure - B29K 2023/12: {PP, i.e. polypropylene} - B29K 2077/00: Use of {PA, i.e.} polyamides, e.g. polyesteramides {or derivatives thereof}, as moulding material - B29K 2077/10: {Aromatic polyamides [polyaramides] or derivatives thereof} - B29K 2081/04: {Polysulfides, e.g. PPS, i.e. polyphenylene sulfide or derivatives thereof} - B29K 2105/06: containing reinforcements, fillers or inserts - B29K 2707/04: Carbon - B29K 2709/08: Glass - B29K 2905/02: Aluminium - B29L 2031/4821: {Helmets} - Y10T 428/24479: including variation in thickness - Y10T 428/24612: Composite web or sheet - Y10T 428/24628: Nonplanar uniform thickness material - Y10T 428/31739: Nylon type - B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00) - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS - B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A composite part comprises a sheet of fiber-reinforced thermoplastic material and a sheet of non-reinforced thermoplastic material superposedly attached together. Both sheets are iointly deformed substantially differently along different axes. A tool for manufacturing the part made of the sheet of thermoplastic material comprises a female die and a male die. The female die has a cavity, whose wall has a bottom portion and a top portion. The male die has a backing structure, a support attached to the backing structure and a heat-resistant bladder. A method of manufacturing the part made of the sheet of thermoplastic material comprises the step of applying pressure on the thermoplastic sheet against the wall of the female die from the bottom of the female die to a splitting line of the female die by inflating a deformable portion of the male die. ## Claims ### Claim 1 A composite part comprising: a sheet of fiber-reinforced thermoplastic material; and a sheet of non-reinforced thermoplastic material superposedly attached to said sheet of fiber-reinforced thermoplastic material, wherein both of said sheets are jointly deformed substantially differently along different axes to form a cavity and wherein said sheet of fiber-reinforced thermoplastic has a thickness which varies over said cavity, the thickness of the fiber-reinforced thermoplastic being substantially thinner over said cavity than elsewhere; wherein the fiber is provided in the form of a weave in the sheet of fiber-reinforced thermoplastic material. ### Claim 2 (depends on 1) The part of claim 1 further comprising an adhesion film between said sheet of fiber-reinforced thermoplastic material and said sheet of non-reinforced thermoplastic material. ### Claim 3 (depends on 2) The part of claim 2 wherein a glass transition temperature of said sheet of fiber-reinforced thermoplastic material is in a different range than a glass transition temperature of said sheet of non-reinforced thermoplastic material. ### Claim 4 (depends on 1) The part of claim 1, wherein said sheet of fiber-reinforced thermoplastic material and said sheet of non-reinforced thermoplastic material have their thermoplastic material selected from the group consisting of polyetherimide, polyphenylene sulfide, polypropylene, nylon 6 and nylon 12. ### Claim 5 (depends on 4) The part of claim 4, wherein said fiber of said sheet of fiber-reinforced thermoplastic material is selected from the group consisting of glass fiber, carbon fiber and aramid fiber. ### Claim 6 (depends on 1) The part of claim 1 wherein both said sheet of fiber-reinforced thermoplastic material and said sheet of non-reinforced thermoplastic material have a high melt strength of 23 or less. ### Claim 7 A composite part comprising: a first sheet of thermoplastic material; and a second sheet of thermoplastic material superposedly attached to said first sheet of thermoplastic material; wherein: both of said sheets are jointly deformed to form a cavity, said sheets of thermoplastic material having a thickness that varies over the cavity such that the thickness of said sheets is thinner over the cavity than elsewhere; wherein the first sheet of thermoplastic material is a sheet of fiber-reinforced thermoplastic material, the second sheet of thermoplastic material is a sheet of non-reinforced thermoplastic material; and the fiber is provided in the form of a weave in the sheet of fiber-reinforced thermoplastic material. ### Claim 8 (depends on 7) The part of claim 7, further comprising a film of adhesive material sandwiched between the two sheets of thermoplastic material. ### Claim 9 (depends on 7) An article comprising at least two of the composite part recited in claim 7, welded together.