WO2015175896A1 - Pièces rapportées pour éléments extrudés - Google Patents

Pièces rapportées pour éléments extrudés Download PDF

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Publication number
WO2015175896A1
WO2015175896A1 PCT/US2015/031004 US2015031004W WO2015175896A1 WO 2015175896 A1 WO2015175896 A1 WO 2015175896A1 US 2015031004 W US2015031004 W US 2015031004W WO 2015175896 A1 WO2015175896 A1 WO 2015175896A1
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WIPO (PCT)
Prior art keywords
expandable
voids
activatabie
process according
structural reinforcement
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PCT/US2015/031004
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English (en)
Inventor
Henry E. Richardson
David J. Kosal
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Zephyros Inc
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Zephyros Inc
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
    • B29C44/18—Filling preformed cavities
    • B29C44/188—Sealing off parts of the cavities
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
    • B60R19/18—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact
    • B60R19/22—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact containing mainly cellular material, e.g. solid foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D29/00—Superstructures, understructures, or sub-units thereof, characterised by the material thereof
    • B62D29/001—Superstructures, understructures, or sub-units thereof, characterised by the material thereof characterised by combining metal and synthetic material
    • B62D29/002—Superstructures, understructures, or sub-units thereof, characterised by the material thereof characterised by combining metal and synthetic material a foamable synthetic material or metal being added in situ

Definitions

  • the present teachings relate generally to inserts for extruded members, and more particularly, activatable inserts for reinforcing extrusion members such as those made of aluminum.
  • Aluminum is a versatile material, as it can be extruded into custom shapes. This is particularly useful for automobiles and other transportation vehicles, as well as applications such as building and construction, because of its light weight and structural strength.
  • Current technology uses structurai reinforcements such as aluminum extrusions for maintaining or improving vehicle durability, stiffness, and crashworthiness.
  • structurai reinforcements such as aluminum extrusions for maintaining or improving vehicle durability, stiffness, and crashworthiness.
  • Activatable materials such as heat-expandable foams and adhesives are often applied to the outer walls of or integrated into structurai reinforcements. Such foams and adhesives expand to fill the gaps between the structural reinforcements and/or within cavities of a vehicle. However, with extruded members, there may be hollow areas or voids where the adhesive or foam, even upon expansion, cannot reach. Activation and curing of the adhesive or foam generaiiy takes place during heating in a bake oven associated with a step of coating a vehicle, such as upon painting.
  • the present teachings meet one or more of the above needs by allowing for increased performance of a structural reinforcement while also expanding capability to allow installation to occur in a trim or body shop, for example, without requiring installation at an OEM or other large scale manufacturing facility (e.g., a facility having a paint bake oven).
  • the present teachings may include any one, ali or combination of the following features.
  • the teachings may include a structural reinforcement member comprising an extrusion member having one or more waifs, with the one or more walls at least partially surrounding one or more voids.
  • the extrusion member may comprise aluminum or another metal or metal alloy.
  • An expandable activatable material may be located within the one or more voids (prior to any expansion), and the expandable activatable materia! may be activated to fill the one or more voids (and possibly areas adjacent the one or more voids) and cure during an aging process of the extrusion member, such as by heat aging.
  • the expandable activatable material may be heat activated, and/or the expandable activatable material may have adhesive properties to adhere to the one or more walls surrounding the one of more voids of the extrusion member upon expansion.
  • the expandable activatable material may be dry and not tacky to the touch at room temperature.
  • the expandable activatable material may comprise an epoxy-based resin having foamable characteristics.
  • the structural reinforcement member may undergo one or more secondary shaping operations, which may occur prior to the activation of fhe expandable activatable material, so that the structural reinforcement member may be shaped to be located within a desired area, such as a cavity.
  • the structural reinforcement member may be for use in a vehicle, such as in a vehicle cavity.
  • the present teachings also may involve a process for providing structural reinforcement.
  • the process may include any, all, or a combination of any of the following steps and features, and any order of the following steps are within the scope of this disclosure.
  • the process may include extruding a metal member having one or more walls with one or more voids at least partially surrounded by the one or more wails of the metal member.
  • the metal member may comprise aluminum.
  • An expandable activatabie materia! may be inserted into the one or more voids.
  • the expandable activatable material may be inserted into the one or more voids in solid form or in liquid form.
  • the expandable aciivaiable material may comprise an epoxy-based resin having foamabie characteristics.
  • the expandable actsvatable materia! may be dry, not tacky to the touch, at room temperature.
  • One or more secondary shaping operations may be performed to shape the metai member to a desired shape. These secondary shaping operations may include stretching, crimping, bending, forming, cutting, the like, or any combination thereof.
  • the metai member may be aged to provide additional strength. The aging step may activate the expandable activatable materia! to fi!! the one or more voids and cure.
  • the aging step may include applying heat to the metai member at a temperature sufficient to activate the expandable activatable material.
  • the heat may be applied at a temperature of about 400°F or less.
  • the process may further include a step of installing the structural reinforcement within a cavity of a vehicle. This installing step may be performed by an OEM or other !arge scale manufacturer, or, alternately, if may be performed by a trim or body shop or an location remote from the OEM or other large scale manufacturer. Such installation may occur prior to any activation of the expandable activatable material.
  • Figure 1 illustrates a exemplary extrusion member with adhesive in a pre-activated state located within a void of the exemplary extrusion member.
  • Figure 2 illustrates the exemplary extrusion member of Figure 1 with the adhesive in a post-activated state
  • FIG. 3 is a flow diagram of an exemplary process for forming a reinforced extrusion member in accordance with the teachings herein.
  • extrusion members are versatile and can be used in applications such as automotive, marine, aerospace, military, building and construction, Sighting, electronics, consumer durables, and man other engineered products.
  • the extrusion members are preferably made of metal and/or metal alloys, thoug other materials, such as plastics, are also possible.
  • the extrusions are lightweight, non-magnetic, corrosion resistant, tough, easily machined or bent, readily recycled, non-toxic, and the like, or any combination thereof
  • the extrusion members may comprise aluminum, as aluminum is capable of being extruded into precise shapes.
  • Aluminum may be used in its pure form, or it may be blended with magnesium, copper, manganese, silicon, zinc, or other materials, or combinations thereof to create alloys with desired properties.
  • the blend may offer increased strength, conductivity, corrosion resistance, and/or other desired properties.
  • Extrusion members are shaped pieces of metal, such as aluminum or aluminum alloy, produced by heating metal blocks and pushing them through a die to create a particular shape or cross-section.
  • the extrusion members may be formed into any desired shape and may include, for example, angles, channels, flat bars, T-bars and Z-bars, I-beams, square or rectangular tubes, the like, or any combination thereof ,
  • Extrusion of members suc as those comprising aluminum or aluminum alloy allows a manufacturer to create a desired shape for a particular application (e.g., based on desired tolerances, structural requirements, aesthetic requirements, and the like).
  • Extruded members may take a variety of shapes, preferably having a hollow or semi-hol!ow cross-section.
  • the ho!iow or semi-hollow cross-section may entirely or partially enclose a void, and the void itse!f may have any desired shape.
  • An extruded member may also have two or more voids, such as a multi-celled extrusion (e.g., having inner reinforcements designed into the part to increase strength and rigidity and provide resistance to twisting).
  • Each void or some voids may have a different shape or each void or some voids may have the same shape.
  • the insert of the present teachings preferably is inserted into the one or more voids of the extrusion members and aiso preferably comprises an activatabie material.
  • the insert ma aiso include a carrier upon which the activatabie material is located. Alternatively the insert may be substantially free of an carrier.
  • the activatabie materia! (e.g., after activation) may assist in providing various properties including structural reinforcement, sealing, acoustical damping properties, combinations thereof and the like.
  • the activatabie material may act as an adhesive which is a bonding agent that holds together and stiffens load-bearing parts and provides a damping effect, which reduces the transmission of vibration through the body structure of a vehicle.
  • the phrase activatabie material includes any material that may be activated to cure (e.g., therm oset), and optionally melt, flow, expand, foam, or a combination thereof by an ambient condition or upon exposure to a particular stimulus.
  • the material may cure and may, in addition, expand, foam, flow, melt, a combination thereof, or the like, upon exposure to a condition such as heat, pressure, chemical exposure, combinations thereof, or the like.
  • the activatabie material may be activated in any suitable manner, in a preferred embodiment, the activatabie materia! is preferably a heat activated adhesive.
  • the adhesive is preferably foamed by the application of heat and more preferably, the adhesive foams and develops adhesive properties during the same heating cycle. In this way, the extruded member with the insert in piace may be heated within the extruded member in which it is located.
  • the adhesive may be activated at ambient temperature.
  • the teachings herei include inserting the activatable material into the afuminum extrusion in an unexpanded or partiaily expanded state and activating the material for expanding (e.g., foaming) to a volume greater than its volume in the unexpanded or partially expanded state (e.g., at least 5% greater, at least 50% greater, at least 200% greater or even at least 1000% or at least 2000%). It is also typically preferred, at feast for reinforcement applications, that the volumetric expansion is such that the expanded volume is less than 400%, more typically less than 300%, possibl less than about 200% or even less than about 100% relative to the original unexpanded volume.
  • the materia! expands to contact and/or adhere to the surrounding walls of the extruded member.
  • the adhesive may be dry to the touch and/or non- tacky at room temperature.
  • it is a materiai that can be heat activated to both expand and develop adhesive properties to adhere to the inner walls of the extrusion member surrounding the void.
  • the activatable material upon activation, will wet and bond to the inner surface of the extrusion member and it may be a thermoplastic, a thermoset or a blend thereof.
  • the materiai may be a structural foam that cures to a rigid structure, such as an epoxy-containing materiai, an ethy!ene-containing polymer, an acetate or acrySate containing polymer, or a mixture thereof, which when compounded with appropriate ingredients (e.g., a blowing agent, curing agent, filler, or combination thereof), typical!y expands, cures or both in a reliable and predictable manner upon the application of heat or another activation stimulus. Therefore, an exemplary materia! may be a heat-activated and/or epoxy-based resi having foamabfe characteristics. After curing, the materia! may become a thermoset material that is fixed and incapable of any substantial flow.
  • appropriate ingredients e.g., a blowing agent, curing agent, filler, or combination thereof
  • the activatable or expandable material typically includes one or more polymeric materials, which may include a variety of different polymers, such as thermoplastics, elastomers, pSastomers, and combinations thereof, or the like.
  • polymers that might be appropriately incorporated into the polymeric admixture include halogenated polymers, polycarbonates, polyketones, urethanes, polyesters, siSanes, suifones, allyis, olefins, styrenes, acrylates, methacryiates (e.g., ethylene methyl acrySate polymer), epoxies, silicones, pheno!ics, rubbers, poSypheoy!ene oxides, terephthalates, acetates (e.g., EVA), or mixtures thereof.
  • EVA e.g., EVA
  • polystyrene e.g., polyethylene, polypropylene
  • polystyrene poiyacry!ate, po!y( ethylene oxide), pGiy(ethyieneimine)
  • polyester poSyurethane
  • polysiloxane polyether
  • polyphosphazine polyamide
  • polyimide polyisobuty!ene
  • polyacrylonitrile polyvinyl chloride, poly(methyl methacry!ate), polyvinyl acetate, poly vinylidene chloride), poiytetrafiuoroethy!ene, polyisoprene, polyacrylamide, poSyacrylic acid, poSymethacrylate.
  • the activatable materia! may include an epoxy resin, which includes any of the conventional dimeric, o!igomeric or polymeric epoxy materials containing at least one epoxy functional group.
  • the polymer-based materials may be epoxy containing materials having one or more oxiran rings polymerizabSe by a ring opening reaction.
  • the epoxy may be aliphatic, cycioaSiphatie, aromatic, or the like.
  • the epoxy may be supplied as a solid (e.g., a pellets, chunks, pieces or the like) or a liquid ⁇ e.g., an epoxy resin).
  • the epoxy may include an ethylene copolymer or terpo!ymer that may possess an a!pha-oSefin.
  • the polymer comprises two or three different monomers, i.e., small molecules with high chemical reactivity that are capable of linking up with similar molecules.
  • an epoxy resin is added to the activatable material to increase adhesion properties of the material.
  • One exemplary epoxy resin may be a phenolic resin, which may be a novalac type or other type of resin.
  • Other preferred epoxy containing materials may include a bisphenol-A epieh!orohydrin ether polymer, or a bisphenol-A epoxy resin which may be modified with butadiene or another polymeric additive.
  • Activatable materials of the present teachings can include a substantial amount of eiastomersc or rubber material, which can be one elastomer or a mixture of several different elastomers. Rubbers and elastomers suitable for the eiastomersc materia!
  • neoprene examples include, without limitation, natural rubber, styrene-birtadiene rubber, polyisoprene, polyssobutylene, po!ybutadiene, ssoprene-butadiene copolymer, neoprene, nitrile rubber (e.g., a butyl nitrite, such as carboxy-terminated butyl nitrite), butyl rubber, poiysu!fide elastomer, acrylic elastomer, acrylonitrile elastomers, silicone rubber, po!yst!oxanes, polyester rubber, diisocyanate-linked condensation elastosTier, EPDM (ethylene-propylene die[eta]e monomer rubbers), chlorosulphonaied polyethylene, f!uorinated hydrocarbons, and the like.
  • natural rubber etyrene-birtadiene rubber, polyisoprene,
  • An elastomer-containing adduci can also be employed in the activatabie material of the present teachings such as an epoxy/elastomer adduci.
  • the elastomer- containing adduct, when added to the activatabie material, preferably is added to modify structural properties of the materia! such as strength, toughness, stiffness, flexural modulus, or the like.
  • the elastomer compound may be a thermosetting or other elastomer.
  • Exemplary elastomers include, without limitation, natural rubber, styrene- butadiene rubber, poiyisoprene, poiyisobutylene, polybutadiene, isoprene-butadiene copolymer, neoprene, nitrite aibber (e.g., a butyl nitrite, such as ca rboxy-terminated butyl nitrile), butyl rubber, poiysuifide elastomer, acrylic elastomer, acry!onitrile elastomers, silicone rubber, polysiioxanes, polyester rubber, diisocyanate-iinked condensation elastomer, EPDM (ethylene-propylene diene rubbers), chlorosulphonated polyethylene, fiuorinated hydrocarbons and the like.
  • recycled tire rubber can be employed.
  • blowing agents may be added to the activatabie materia!.
  • blowing agents assist in forming ce!!uiar or foamed activated materials, which typically have a lower density and/or weight.
  • the blowing agent may be a physical blowing agent or a chemical blowing agent
  • the blowing agent may be a thermoplastic encapsulated solvent that expands upon exposure to a condition such as heat.
  • the blowing agent may chemically react to liberate gas upon exposure to a condition such as heat or humidity or upon exposure to another chemical reactant.
  • the blowing agent may include one or more nitrogen containing groups such as amides, amines, and the like. Examples of suitable blowing agents include azodicarbonamide, diniirosopentamethyleneieframine, 4,4j ⁇ oxy-bis ⁇
  • An accelerator for the blowing agents may also be provided in the activatabie material Various accelerators may be used to increase the rate at which the blowing agents form inert gases.
  • One preferred blowing agent accelerator is a metal salt, or is an oxide (e.g., a metai oxide, such as zinc oxide).
  • Other preferred accelerators include modified and unmodified thiazoSes or imidazoles, ureas or the like. Amounts of blowing agents and blowing agent accelerators can vary widely within the activatabie material depending upon the cellular structure desired, the desired amount of expansion of the expandable material, the desired rate of expansion and the like.
  • One or more curing agents and/o curing agent accelerators may be added to the activatabie material. Amounts of curing agents and curing agent accelerators can also vary widely within the activatabie material depending upon the type of cellular structure desired, the desired amount of expansion of the activatabie materia!, the desired rate of expansion, the desired structural properties, of the activatabie material and the like.
  • the curing agents assist the activatabie material in curing by crosslinking of the polymers, epoxy resins, or both. It can also be desirable for the curing agents to assist in thermosetting the activatabie material.
  • Useful classes of curing agents are materials selected from aliphatic or aromatic amines or their respective adducts, amidoamines, poiyamides, cycioaSiphatic amines (e.g., anhydrides, polycarboxylic polyesters, isocyanates, phenol-based resins (such as phenol or cresol novolak resins), copolymers such as those of phenol terpene, polyvinyl phenoi, or bisphenot-A formaldehyde copolymers, bishydroxyphenyl aikanes or the like), sulfur or mixtures thereof.
  • Particular preferred curing agents include modified and unmodified poiyamines or poiyamides such as triethylenetetramine, diethylenetriamine, tetraethylenepentamine, cyanoguanidine, dicyandiamides, and the like.
  • An accelerator for the curing agents ⁇ e.g., a modified or unmodified urea such as methylene diphenyi bis urea, an imidazole or a combination thereof) may aiso be provided for preparing the activatabie material.
  • curing agent accelerators include, without limitation, metal carbamates ⁇ e.g., copper dimethyl dithio carbamate, zinc dibutyi dithio carbamate, combinations thereof, or the !ike), disulfides (e.g., dibenzothiazoie disulfide), or the like.
  • the activatabie materia! may include a first curing agent and, optionally, a first curing agent accelerator and a second curing agent and, optionally, a second curing agent accelerator, any or ail of which may be latent.
  • the first curing agent and/or accelerator are typically designed to partially cure the activatabie material during processing (e.g., processing, mixing, shaping or combination thereof) of th activatabie material with the desired self-supporting properties.
  • the second curing agent and/o accelerator will then typically be latent such that they cure the activatabie material upon exposure to a condition such as heat, moisture or the like,
  • the second curing agent and/or accelerator are latent such that one or both of them cure the polymeric materials of the expandable materia! at a second temperature or activation temperature or temperature range.
  • the first curing agent and/or accelerator may be also latent, but either or both of them partially cure the expandable material upon exposure to a first elevated temperature that is below the second temperature or activation temperature.
  • the first temperature and partial cure will typically be experienced during materia! mixing, shaping, or both.
  • the first temperature and partial cure can be experienced in an extruder that is mixing the ingredients of the activatabie material and extruding the activatabie material through a die into a particular shape.
  • the first temperature and partial cure can be experienced in a molding machine (e.g., injection molding, blow molding, compression molding) that is shaping and, optionally, mixing the ingredients of the expandable material.
  • the second temperature or activation temperature and substantially full cure can then occur at a temperature experienced during processing of the extrusion member into which the activatabie materia! has been inserted.
  • the activatabie material can additionally expand (e.g., foam) as well as cure.
  • the activatabie materia! may also include one or more fillers, including but not limited to particuiated materials (e.g., powder), beads, microspheres, or the like.
  • the filler includes a relatively iow-density material that is generally non- reactive with the other components present in the activatabie material.
  • filler examples include silica, diatomaeeous earth, glass, clay, talc, pigments, colorants, glass beads or bubbles, glass, carbon ceramic fibers, antioxidants, and the !ike.
  • Such fillers, particularly clays can assist the activatabie material in leveling itself during flow of the material.
  • the clays that may be used as fillers may include clays from the kao!inite, illite, chloritem, smecitite or sepio!ite groups, which may be calcined.
  • suitable fillers include, without limitation, talc, vermicuiiie, pyrophyllite, sauconite, sapontte, nontronite, montmorillonite or mixtures thereof.
  • the clays may also include minor amounts of other ingredients such as carbonates, feldspars, micas, and quartz.
  • the fillers may also include ammonium chlorides such as dimethyl ammonium chloride and dimethyl benzyl ammonium chloride. Titanium dioxide might also be employed.
  • one or more mineral or stone type fillers such as calcium carbonate, sodium carbonate or the like may be used as fillers.
  • silicate minerals such as mica may be used as filters. It has been found that, in addition to performing the normal functions of a filler, silicate minerals and mica in particular improved the impact resistance of the cured activatable materia!,
  • One of the fillers or other components of the material may be thixotropic for assisting in controlling flow of the materia! as well as properties such as tensile, compressive or shear strength.
  • Such thixotropic fillers can additionally provide self- supporting characteristics to the activatable materia!.
  • Examples of thixotropic fillers include, without limitation, silica, calcium carbonate, days, aramid fiber or pulp or others.
  • One preferred thixotropic filler is synthetic amorphous precipitated silicon dioxide.
  • the activatable materia! may also include one or more fire retardants.
  • Useful flame retardants for the activatable materia! include halogenated polymers, other halogenated materials, materials ⁇ e.g., polymers) including phosphorous, bromine, chlorine, bromine oxide, combinations thereof or the like.
  • Exemplary flame retardants include, without limitation, chforoa!ky! phosphate, dimethyl methylphosphonate, bromine- phosphorus compounds, ammonium polyphosphate, neopentySbromide po!yether, brominated polyether, antimony oxide, calcium metaborate, chlorinated paraffin, brominated toluene, hexabromobenzene, antimony trioxide, graphite ⁇ e.g., expandable graphite), combinations thereof or the like.
  • additives, agents or performance modifiers may also be included in the expandable material as desired, including but not limited to a UV resistant agent, a flame retardant, an impact modifier, a heat stabilizer, a UV photoinitiator, a colorant, a processing aid, a lubricant, a reinforcement (e.g., chopped or continuous glass, ceramic, aramid, carbon fiber or the like),
  • the activatable materia! may aiso include an adhesion promoter, including but not limited to epoxy materials, acrylates, hydrocarbon resins or the like, Activatable materials may also include a processing oil or a mixture of multiple oils.
  • the activatable material is inserted as an insert into the extrusion member during assembling and processing the structural member.
  • the process may include the following steps. Shaping the extrusion member can use any process known in the art.
  • the extrusion member can be shaped by first heating blocks, or billets, preferably of aluminum or aluminum alloy, to soften the metai.
  • the heated metal is generally coated with a release agent, film or lubricant and sent through a hydraulic or mechanical press, which gradually pushes the heated material through a die to create a straight extrusion with a desired cross- sectional shape.
  • the heat applied to the metal is dependent upon the metal and/or alloys used, as these are processed at different temperatures.
  • the extrusion may be cooled, such as with water or air, upon exiting the die.
  • the activatabie material may be inserted into one or more voids or hollow spaces within the straight extrusion.
  • the activatabie material may be solid, liquid, molded, dry, non-tacky to the touch, or combination thereof, and may fit within the void or ho!low space.
  • the activatabie materia! may be introduced into the void or hollow space by a msni-applicator or other applicator ⁇ e.g., for use with liquid activatabie material).
  • the extrusion member may undergo secondary shaping processes, such as stretching, crimping, bending, forming, cutting to a desired length, and the like, to fit the area being reinforced. It is also possible that the activatabie material can be inserted into the extrusion after any or all of the secondary shaping processes (e.g., the straight extrusion may be stretched or cut to a desired iengfh prior to inserting the activatabie material).
  • the extrusion members are then aged to increase hardness and temper the material (e.g., to take the aluminum materia! from a T4 temper designation to a T6 temper designation).
  • the aging process may include treatment of a metal or metal ailoy at elevated temperatures so as to accelerate the changes in the properties of the metal or metal alloy as a result of a casting and forging process.
  • the aging process may take place at room temperature, or more preferably, in an aging oven.
  • the aging process is a heat aging process performed at a temperature about 400°F or less for a period of about 1 hour or more and about 12 hours or less.
  • the activatabie material is preferably activated, thereb causing the activatabie material to expand to at least partially fill the void or hollow areas within the extrusion material, and cured.
  • Figure 1 shows an exemplary extrusion member 10 having a hollow area or void 12.
  • the activatabie materia! 14 is located within the void 12 prior to expansion.
  • Figure 2 shows the exemplary extrusion member 10 of Figure 1 after the activatabie material 14 has been activated to expand and at least partially fill the void (see Figure 1 ). This provides stiffness for load-bearing parts and a damping effect to reduce the transmission of vibrations through the bod structure while maintaining a light weight.
  • step 310 involves creating an aluminum extrusion having one or more voids.
  • Aluminum is preferred as it may be used to extrude and bend into precision shapes, though other metallic extrusions are possible.
  • the extrusion may be created using any metallic extrusion method known in the art.
  • step 320 involves inserting an activatabie material in the one or more voids of the aluminum extrusion.
  • the activaiabie material is heat-activated, foam able, capable of expansion, adhesive, the like, or any combination thereof.
  • the activatabie material has not yet been activated or not yet been fully activated upon insertion in the one or more voids.
  • the activatabie material may be inserted in solid form, liquid form, or combination thereof.
  • Step 330 involves performing one or more secondar shaping operations to shape the aluminum extrusion.
  • Aluminum extrusions may require shaping to a desired shape or length, such as one that generally matches the shap of a cavity into which the extrusion will be inserted.
  • These shaping operations may include crimping, bending, forming, stretching, cutting, the like, or a combination thereof.
  • Some of these secondary shaping operations may be performed prior to performing step 320. For example, it may be desirable to stretch and/or cut a straight extrusion to a desired length before inserting activatabie material in the one or more voids.
  • Step 340 involves aging the aluminum extrusion.
  • This aging step may be a heat aging step, where heat is applied to the aluminum extrusion for a desired length of time to thermally treat the extrusion and provide additional strength (e.g., to bring the aluminum from a T4 to a T8 temper designation).
  • the activatabie materia! is heat-activated and will expand to at least partially fill the one or more voids, will adhere to the walls surrounding the one or more voids, will cure, or combination thereof.
  • Step 350 involves installing the shaped aluminum extrusion into the cavity of a vehicle.
  • the activatabie material within the shaped aluminum extrusion preferably acts as a bonding agent that holds together and stiffens load-bearing parts and provides a damping effect, which reduces the transmission of vibration through the body structure.
  • the activatabie materia! has preferably already been expanded and cured, the extrusions can be installed outside of an OEM or other large scale manufacturing facility. For example, when parts are damaged in a vehicle from a collision, they are often replaced to restore the structural integrity and safety of the vehicles, and these extrusions can be installed in a vehicle in a trim or body shop.
  • any member of a genus may be excluded from the genus; and/or any member of a Ivlarkush grouping may be excluded from the grouping.
  • any numerical values recited herein include aii values from the Sower value to the upper value in increments of one unit provided that there is a separation of at least 2 units between any lower value and any higher value.
  • the amount of a component, a property, or a value of a process variable such as, for example, temperature, pressure, time and the like is, for example, from 1 to 90, preferably from 20 to 80, more preferabiy from 30 to 70, it is intended that intermediate range values such as (for example, 15 to 85, 22 to 68, 43 to 51 , 30 to 32 etc.) are within the teachings of this specification.
  • individual intermediate values are also within the present teachings.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

L'invention concerne un élément de renforcement structural comprenant un élément extrudé (10) ayant une ou plusieurs parois et un ou plusieurs espaces vides (12) au moins en partie entourés par ladite ou lesdites parois de l'élément extrudé (10). Un matériau activable expansible (14) est situé à l'intérieur dudit ou desdits espaces vides (12), une ou plusieurs opérations de façonnage secondaire sont effectuées sur l'élément extrudé (10) et le matériau activable expansible (14) est activé afin de remplir ledit ou lesdits espaces vides pendant un processus de vieillissement, ce qui confère une résistance supplémentaire tout en maintenant un faible poids.
PCT/US2015/031004 2014-05-15 2015-05-15 Pièces rapportées pour éléments extrudés Ceased WO2015175896A1 (fr)

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US201461993714P 2014-05-15 2014-05-15
US61/993,714 2014-05-15

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018025076A1 (fr) * 2016-08-05 2018-02-08 Zephyros, Inc. Système d'étanchéité de cavité pour véhicules automobiles

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19504601A1 (de) * 1995-01-11 1996-07-25 Wicona Bausysteme Gmbh Wärmegedämmtes Verbundprofil
US5804608A (en) * 1995-01-21 1998-09-08 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Heat-foamable filling reinforcement and reinforced closed-section structural-member making use of the same
US6058673A (en) * 1996-05-10 2000-05-09 Henkel Corporation Internal reinforcement for hollow structural elements
US20080075864A1 (en) * 2006-08-09 2008-03-27 Billotto Frank V Multi-segment expandable polymer compositions which expand in a controllable direction
DE202008000076U1 (de) * 2008-01-11 2009-02-19 Henkenjohann, Johann Mehrkammer-Hohlprofil
DE102007059183A1 (de) * 2007-12-06 2009-06-10 Henkel Ag & Co. Kgaa Verfahren zur Verstärkung, Dämmung, Dämpfung und/oder Abdichtung von Hohlbauteilen
DE102009034968A1 (de) * 2009-07-28 2011-02-03 Technoform Caprano Und Brunnhofer Gmbh & Co. Kg Isoliersteg

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19504601A1 (de) * 1995-01-11 1996-07-25 Wicona Bausysteme Gmbh Wärmegedämmtes Verbundprofil
US5804608A (en) * 1995-01-21 1998-09-08 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Heat-foamable filling reinforcement and reinforced closed-section structural-member making use of the same
US6058673A (en) * 1996-05-10 2000-05-09 Henkel Corporation Internal reinforcement for hollow structural elements
US20080075864A1 (en) * 2006-08-09 2008-03-27 Billotto Frank V Multi-segment expandable polymer compositions which expand in a controllable direction
DE102007059183A1 (de) * 2007-12-06 2009-06-10 Henkel Ag & Co. Kgaa Verfahren zur Verstärkung, Dämmung, Dämpfung und/oder Abdichtung von Hohlbauteilen
DE202008000076U1 (de) * 2008-01-11 2009-02-19 Henkenjohann, Johann Mehrkammer-Hohlprofil
DE102009034968A1 (de) * 2009-07-28 2011-02-03 Technoform Caprano Und Brunnhofer Gmbh & Co. Kg Isoliersteg

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018025076A1 (fr) * 2016-08-05 2018-02-08 Zephyros, Inc. Système d'étanchéité de cavité pour véhicules automobiles
CN109641624A (zh) * 2016-08-05 2019-04-16 泽菲罗斯有限公司 用于机动车辆的腔体密封系统

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