# US 10,309,558 B2 · Bent product > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,309,558 B2 - Document ID: US10309558B2 - Status: Granted - Kind: B2 - Application number: 15/324,222 - Filed: 2015-07-13 - Published: 2017-07-13 - Granted: 2019-06-04 - Earliest claimed: 2014-07-11 - Assignees: Kurashiki Boseki Kabushiki Kaisha - Applicants: Kurashiki Boseki Kabushiki Kaisha - Inventors: Junichi Wako; Katsuya Ichinose - Web page: https://patentgrep.com/patent/US10309558B2 ## CPC - F16L 9/003: {with a rectangular cross-section (ducting arrangements in air-conditioning or ventilation F24F13/02)} - B21C 23/142: {Making profiles} - B21D 7/00: Bending rods, profiles, or tubes (B21D11/02 - B21D11/18 take precedence; using mandrels or the like B21D9/00) - B29C 48/15: incorporating preformed parts or layers, e.g. extrusion moulding around inserts - B29C 53/08: of tubes {or other profiled members} - B32B 15/02: {Layer formed of wires, e.g. mesh} - B32B 15/085: comprising polyolefins - F16L 9/147: comprising only layers of metal and plastics with or without reinforcement - F16L 9/19: Multi-channel pipes or pipe assemblies - B21D 35/007: {Layered blanks (B21D22/203 takes precedence; joining superposed plates B21D39/031, B21D39/034, B21D39/035)} - B21D 47/04: composite sheet metal profiles - B29K 2705/00: Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts - B29L 2023/004: {Bent tubes (for use as pipe couplings B29L2031/24)} - F16L: PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL - B21C: MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL - B21D: WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL (working or processing of wire B21F) - 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 ## Abstract [Problem] To provide a bent product from an integrally extrusion molded body without the loss of lightweight properties or the like. [Solution] A bent product (10) that is formed by bending an integrally extrusion-formed body and has: a metal core material (20) provided with a tube-shaped peripheral wall (21) and a first partition wall (23) that extends in the longitudinal direction of the tube shape and divides the inner space of the peripheral wall in the direction of the major axis of the cross section perpendicular to the longitudinal direction of the tube shape; and a covering layer (40) that is formed on the outer surface of the core material and contains at least a thermoplastic resin. The thickness (t) of the peripheral wall is 0.8-2.3 mm, and a reinforcing means is provided to the inner space side of the peripheral wall at a section (25) thereof to the inside of the bend. ## Claims ### Claim 1 A bent product obtained by bending an integrally extrusion-molded body, the bent product comprising: a metal core material comprising a tubular peripheral wall and a first partition wall dividing an internal space of the tubular peripheral wall in a long-diameter direction of a cross section perpendicular to a longitudinal direction of the tubular peripheral wall and extending in the longitudinal direction of the tubular peripheral wall; and a coating layer formed on an outer surface of the core material and containing at least a thermoplastic resin, wherein a thickness of the tubular peripheral wall is in a range from 0.8 mm to 2.3 mm, wherein a reinforcing means is provided on an internal space side of an inner side portion of a bending of the tubular peripheral wall, and wherein a ratio H (mm)/R (mm) between a cross-sectional height (H) of the core material and a radius of curvature (R) of the bending is 0.09 or less. ### Claim 2 (depends on 1) The bent product according to claim 1, wherein a bending plane of the bending is substantially orthogonal to the long-diameter direction of the cross section perpendicular to the longitudinal direction of the tubular peripheral wall, wherein the reinforcing means comprises the first partition wall, and wherein a ratio Y (mm)/ti (mm) between a span (Y) of the first partition wall and a thickness (ti) of the tubular peripheral wall in the inner side portion of the bending is 12.0 or less. ### Claim 3 (depends on 1) The bent product according to claim 1, wherein a bending plane of the bending is substantially in parallel with the long-diameter direction of the cross section perpendicular to the longitudinal direction of the tubular peripheral wall, wherein the reinforcing means comprises a second partition wall provided in the metal core material, wherein the second partition wall divides a space surrounded by the inner side portion of the bending of the tubular peripheral wall and the first partition wall in a short-diameter direction of the cross section perpendicular to the longitudinal direction of the tubular peripheral wall and extends in the longitudinal direction of the tubular peripheral wall, and wherein a ratio Y (mm)/ti (mm) between a span (Y) of the second partition wall and the thickness (ti) of the tubular peripheral wall in the inner side portion of the bending is 12.0 or less. ### Claim 4 A bent product obtained by bending an integrally extrusion-molded body, the bent product comprising: a metal core material comprising a tubular peripheral wall and a first partition wall dividing an internal space of the tubular peripheral wall in a long-diameter direction of a cross section perpendicular to a longitudinal direction of the tubular peripheral wall and extending in the longitudinal direction of the tubular peripheral wall; and a coating layer formed on an outer surface of the core material and containing at least a thermoplastic resin, wherein a thickness of the tubular peripheral wall is in a range from 0.8 mm to 2.3 mm, wherein a reinforcing means is provided on an internal space side of an inner side portion of a bending of the tubular peripheral wall, wherein the bending plane of the bending is substantially in parallel with the long-diameter direction of the cross section perpendicular to the longitudinal direction of the tubular peripheral wall, wherein the reinforcing means comprises a reinforcing member fitted/inserted into a space surrounded by the inner side portion of the bending of the tubular peripheral wall and the first partition wall and extending in the longitudinal direction of the tubular peripheral wall, and wherein the reinforcing member includes: a thickness of 0.8-3.0 mm; a backing surface abutting on the inner side portion of the bending of the tubular peripheral wall; and a leg portion in parallel with the bending plane and formed continuously from the backing surface. ### Claim 5 (depends on 1) The bent product according to claim 1, wherein a ratio H (mm)/to (mm) between a cross-sectional height (H) of the core material and a thickness (to) of the tubular peripheral wall in an outer side portion of the bending is 18.0 or less. ### Claim 6 (depends on 1) The bent product according to claim 1 wherein the core material comprises aluminum. ### Claim 7 A bent product obtained by bending an integrally extrusion-molded body, the bent product comprising: a metal core material comprising a tubular peripheral wall and a first partition wall dividing an internal space of the tubular peripheral wall in a long-diameter direction of a cross section perpendicular to a longitudinal direction of the tubular peripheral wall and extending in the longitudinal direction of the tubular peripheral wall; and a coating layer formed on an outer surface of the core material and containing at least a thermoplastic resin, wherein a thickness of the tubular peripheral wall is in range from 0.8 mm to 2.3 mm, wherein a reinforcing means is provided on an internal space side of an inner side portion of a bending of the tubular peripheral wall, and wherein the coating layer contains at least a thermoplastic resin and wood flour. ### Claim 8 (depends on 1) The bent product according to claim 1, wherein the thermoplastic resin contained in the coating layer comprises a polyolefin resin. ### Claim 9 (depends on 1) The bent product according to claim 1, wherein a thickness of the coating layer is in a range from 0.1 mm to 5 mm. ### Claim 10 (depends on 1) The bent product according to claim 1, further comprising an adhesive layer formed between the core material and the coating layer. ### Claim 11 (depends on 10) The bent product according to claim 10, wherein the adhesive layer contains at least a copolymer of an α-olefin and an epoxy group-containing unsaturated monomer. ### Claim 12 (depends on 10) The bent product according to claim 10, wherein a thickness of the adhesive layer is in a range from 0.05 mm to 1.0 mm. ### Claim 13 (depends on 1) The bent product according to claim 1, wherein a cross-sectional shape of the core material is substantially rectangular. ### Claim 14 (depends on 7) The bent product according to claim 7, wherein a bending plane of the bending is substantially orthogonal to the long-diameter direction of the cross section perpendicular to the longitudinal direction of the tubular peripheral wall, wherein the reinforcing means comprises the first partition wall, and wherein a ratio Y (mm)/ti (mm) between a span (Y) of the first partition wall and a thickness (ti) of the tubular peripheral wall in the inner side portion of the bending is 12.0 or less. ### Claim 15 (depends on 7) The bent product according to claim 7, wherein a bending plane of the bending is substantially in parallel with the long-diameter direction of the cross section perpendicular to the longitudinal direction of the tubular peripheral wall, wherein the reinforcing means comprises a second partition wall provided in the metal core material, wherein the second partition wall divides a space surrounded by the inner side portion of the bending of the tubular peripheral wall and the first partition wall in a short-diameter direction of the cross section perpendicular to the longitudinal direction of the tubular peripheral wall and extends in the longitudinal direction of the tubular peripheral wall, and wherein a ratio Y (mm)/ti (mm) between a span (Y) of the second partition wall and the thickness (ti) of the tubular peripheral wall in the inner side portion of the bending is 12.0 or less.