WO2014156682A1 - Structure de plancher de véhicule résineux renforcé de fibres et procédé de fabrication associé - Google Patents

Structure de plancher de véhicule résineux renforcé de fibres et procédé de fabrication associé Download PDF

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Publication number
WO2014156682A1
WO2014156682A1 PCT/JP2014/056667 JP2014056667W WO2014156682A1 WO 2014156682 A1 WO2014156682 A1 WO 2014156682A1 JP 2014056667 W JP2014056667 W JP 2014056667W WO 2014156682 A1 WO2014156682 A1 WO 2014156682A1
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WO
WIPO (PCT)
Prior art keywords
forming material
reinforced resin
floor structure
section
fiber reinforced
Prior art date
Application number
PCT/JP2014/056667
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English (en)
Japanese (ja)
Inventor
黒田義人
関戸俊英
Original Assignee
東レ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 東レ株式会社 filed Critical 東レ株式会社
Priority to JP2014512579A priority Critical patent/JPWO2014156682A1/ja
Publication of WO2014156682A1 publication Critical patent/WO2014156682A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/20—Floors or bottom sub-units
    • B62D25/2009—Floors or bottom sub-units in connection with other superstructure subunits
    • B62D25/2036—Floors or bottom sub-units in connection with other superstructure subunits the subunits being side panels, sills or pillars
    • 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
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/40—Shaping or impregnating by compression not applied
    • B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
    • B29C70/46—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs
    • B29C70/48—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs and impregnating the reinforcements in the closed mould, e.g. resin transfer moulding [RTM], e.g. by vacuum
    • 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
    • B62D29/04—Superstructures, understructures, or sub-units thereof, characterised by the material thereof predominantly of synthetic material
    • B62D29/043—Superstructures

Definitions

  • the present invention relates to a fiber reinforced resin vehicle floor structure in which a floor forming material forming a floor portion and side forming materials extending in the vehicle front-rear direction on both sides of the floor portion are integrated, and a method for manufacturing the same.
  • the vehicle floor structure is usually made of metal.
  • the vehicle floor structure 103 is integrated.
  • the side portion 102 has a closed cross-sectional structure in order to ensure high bending rigidity and torsional rigidity of the entire vehicle floor structure 103.
  • a hat-shaped cross-sectional member must be joined to each other in the side portion 102 to form a hollow structure. There is a problem that it takes time and effort. Further, when the hat-shaped cross-section members are joined together, it is generally joined partially by spot welding, so that it is difficult to increase the rigidity of the entire structure 103.
  • the vehicle floor structure 111 made of fiber reinforced resin having a cross section as shown in FIG. 11 is drawn and formed including the side portion 112 having a closed cross section.
  • 11 is a structure that is relatively long in the direction perpendicular to the paper surface of FIG. 11 (that is, the longitudinal direction of the vehicle). Therefore, it is usually difficult to draw out such a long member with a substantially equal cross section. is there.
  • Patent Documents 1 and 2 disclose a technique for producing a side portion having a closed cross section as a member made of fiber reinforced resin.
  • Patent Document 1 extends the side portion made of fiber reinforced resin in the horizontal direction.
  • a fiber reinforced resin vehicle floor structure which is joined and integrated with a fiber reinforced resin floor formed by an RTM (Resin Transfer Molding) method at one joint surface.
  • the side portion made of fiber reinforced resin having a closed cross-sectional shape has only one joining surface extending in a planar shape. Since it is joined to the floor part made of steel, when viewed from the whole floor structure, there is a risk that the joint strength between the side part and the floor part may not be secured sufficiently high, in other words, the force transmission characteristics at this joint part, in other words, There remains concern about the mechanical properties of this part (especially bending rigidity and torsional rigidity).
  • the object of the present invention is to make sure that the fiber-reinforced resin side portion having a closed cross-sectional shape is bonded more securely and more firmly to the fiber-reinforced resin floor portion in order to eliminate the above-mentioned concerns in the prior art.
  • Another object of the present invention is to provide a fiber reinforced resin vehicle floor structure capable of reducing the weight of the vehicle and capable of producing a mechanical structure such as high bending rigidity and torsional rigidity as a whole structure and a method for manufacturing the same.
  • a method for manufacturing a fiber reinforced resin vehicle floor structure includes a floor forming material for forming a floor portion extending in a vehicle width direction and a vehicle front-rear direction, and the floor portion.
  • the side forming material is manufactured as a molded body or a preformed body in which at least a part of the side portion is preliminarily molded, and the side forming material is disposed at a predetermined position in a mold, and the floor forming material Is disposed in a mold so as to be in contact with at least two different surfaces from the side forming material, and a resin is injected and impregnated into the reinforcing fiber base, and the resin is added to the reinforcing fiber base. Impregnated Consists wherein the integrating by bonding serial floor forming member and the said side forming material.
  • the side forming material is a preformed molded body (that is, a fiber reinforced resin molded body) or a preformed body (that is, a prepreg, A preformed body for a fiber-reinforced resin molded body such as a pre-shaped reinforcing fiber base material), and is placed in a predetermined position in the mold (that is, a position for forming a predetermined side portion).
  • a reinforcing fiber base for constituting the floor forming material is disposed in the mold so that the side forming material is in contact with at least two surfaces different from the side forming material, and resin is injected into the reinforcing fiber base.
  • Impregnated and RTM molding of the floor forming material is performed.
  • the floor forming material in which the reinforcing fiber base material is impregnated with the resin and the side forming material are integrated by injection resin injection.
  • the floor forming material and the side forming material to be integrated are bonded at least on two different surfaces, so that the floor forming material and the side forming material are bonded securely and firmly.
  • mechanical properties such as high bending rigidity and torsional rigidity are exhibited as a whole structure.
  • the target fiber-reinforced resin vehicle can be obtained by a simple molding process equivalent to the case of only the RTM molding of the floor forming material.
  • the floor structure for use is easily and reliably manufactured.
  • an adhesive layer can be interposed between the reinforcing fiber base constituting the floor forming material.
  • an adhesive used for the adhesive layer for example, a film adhesive can be used.
  • the side cross-sectional shape of the closed cross section can be set to an appropriate shape, but the floor forming material and the side forming material In view of facilitating the joining, for example, it is preferable to form in a square closed cross-sectional shape.
  • the side forming material can be prepared as a molded body or a preformed body formed in a form having a cross section of a closed cross section equivalent to the side part to be finally manufactured, or the side forming material Is formed as a molded body or a preformed body having an open portion in the cross section, and the cross section of the target closed cross section in the side section is formed by integrating the side forming material and the floor forming material. You can also.
  • the side part of the finally manufactured fiber reinforced resin vehicle floor structure may have a closed cross-sectional shape.
  • the previously molded molded body or the preformed body can be disposed so as to be surrounded by the reinforcing fiber base material constituting the floor forming material.
  • the floor forming material and the side forming material can be more reliably and firmly joined and integrated.
  • the closed cross section of the side part may be left as a hollow part, or a core material may be arranged in the hollow part.
  • the molded body or the preform can be easily molded into a predetermined cross-sectional structure.
  • the cross-sectional shape of the side forming material previously arranged in the mold can be easily maintained in a predetermined shape.
  • the at least two different surfaces may include, for example, two surfaces extending at different angles with respect to the horizontal plane, for example, two surfaces extending adjacent to each other at different angles.
  • the other surface is preferably within a range of 10 to 120 ° with respect to the horizontal surface.
  • a range of 30 to 95 degrees is more preferable, a range of 70 to 90 degrees is more preferable, and a range of 75 to 85 degrees is particularly preferable.
  • a particularly preferable range is within the range of 75 to 85 degrees, and by setting the angle of the other surface to 75 degrees or more, it becomes possible to secure a wide cabin space as much as possible. It becomes possible to ensure the ease of die cutting at the time of forming the forming material or at the time of forming the side portion.
  • the floor forming material and the side forming material are joined and integrated on two surfaces spread at the same angle with respect to the horizontal plane at different positions. Even in such a form, the floor forming material and the side forming material are firmly joined and integrated, and the floor for the target is made of a fiber reinforced resin vehicle by a simple molding process only of RTM molding of the floor forming material. The structure is easily and reliably manufactured.
  • the at least two different surfaces in consideration of the fact that a load is applied to the vehicle floor structure in the vertical direction and the vehicle width direction of the vehicle, the configuration includes two surfaces that spread at different angles with respect to the horizontal plane. This is more advantageous and preferable from the viewpoint of maintaining the bonding strength.
  • the side forming material is not limited to linearly extending in the vehicle front-rear direction, and may be configured to extend non-linearly in the vehicle front-rear direction. That is, in many vehicles, the outer surface often extends so as to draw a curved line in the vehicle front-rear direction, so that it is possible to cope with such a form.
  • the reinforcing fiber of the fiber reinforced resin constituting the vehicle floor structure is not particularly limited, and carbon fiber, glass fiber, aramid fiber, or a combination thereof can be used. From the viewpoint of manufacturing a vehicle floor structure, carbon fiber is preferably used as the reinforcing fiber in consideration of the ease of strength design.
  • the matrix resin of the fiber reinforced resin is not particularly limited, and either a thermoplastic resin or a thermosetting resin can be used.
  • the present invention has a floor forming material for forming a floor portion extending in the vehicle width direction and the vehicle front-rear direction, and extends in the vehicle front-rear direction at both sides in the vehicle width direction of the floor portion, and the cross section is formed as a closed cross section.
  • a pre-formed side forming material for forming at least a part of the side part is integrated by joining by molding of the floor forming material on at least two different surfaces of the side forming material.
  • a floor structure for a vehicle made of fiber reinforced resin is also provided.
  • an embodiment in which an adhesive layer is interposed between the preformed side forming material and the floor forming material is adopted.
  • an adhesive layer is interposed between the preformed side forming material and the floor forming material.
  • a film adhesive can be used as the adhesive.
  • the fiber reinforced resin vehicle floor structure according to the present invention it is possible to adopt a form in which the cross section of the side portion is formed in a square closed cross section.
  • the hollow part of the cross section of the closed cross section in the side part can be left in a hollow form, or a form in which the core material is arranged in the hollow part can be adopted.
  • any of the above-described at least two different planes including two planes extending at different angles with respect to the horizontal plane, at least two different planes including two planes extending at the same angle with respect to the horizontal plane, and any combination thereof Can also be adopted.
  • any of a form in which the side portion extends linearly in the vehicle front-rear direction, a form that extends non-linearly, or a combination thereof can be employed.
  • the reinforcing fiber of the fiber reinforced resin constituting the vehicle floor structure is not particularly limited, and carbon fiber, glass fiber, aramid fiber, or a combination thereof can be used. From the viewpoint of manufacturing a high-strength, high-rigidity vehicle floor structure, it is preferable that carbon fiber is used as the reinforcing fiber, considering the ease of strength design.
  • the matrix resin of the fiber reinforced resin is not particularly limited, and either a thermoplastic resin or a thermosetting resin can be used.
  • the fiber reinforced resin side portion having the closed cross-sectional shape can be reliably and strongly bonded to the fiber reinforced resin floor portion.
  • the vehicle floor structure can be joined and integrated, the vehicle floor structure as a whole can exhibit mechanical properties such as high bending rigidity and torsional rigidity.
  • a fiber reinforced resin vehicle floor structure targeted for high mechanical characteristics can be manufactured by using RTM molding of a floor forming material, and the manufacturing can be facilitated.
  • FIG. 1 is a schematic cross-sectional view showing a fiber reinforced resin vehicle floor structure according to an embodiment of the present invention and a method for manufacturing the same. It is a general
  • FIG. 1 shows a fiber reinforced resin vehicle floor structure according to an embodiment of the present invention and a method for manufacturing the same.
  • FIG. 1 shows a transverse section (that is, a section in the vehicle width direction) seen in a direction crossing the vehicle longitudinal direction.
  • 1 shows the whole of a fiber reinforced resin vehicle floor structure.
  • a floor forming material 3 made of fiber reinforced resin for forming a floor portion 2 extending in the vehicle width direction (left-right direction in FIG. 1) and the vehicle front-rear direction (direction perpendicular to the paper surface in FIG.
  • side forming material 5 made of fiber reinforced resin is integrated to form side portion 4 extending in the vehicle front-rear direction at both sides in the vehicle width direction of floor portion 2 and having a cross section formed in a closed cross section.
  • a resin vehicle floor structure 1 is shown.
  • the side forming material 5 is produced as a molded body or a preformed body having a closed cross section.
  • the side forming material 5 is configured to have a structure in which the core material 6 is disposed in a hollow portion having a closed cross section.
  • the core material 6 is made of a lightweight material such as foam.
  • the side box forming material 5 constituting part of the substantially box-shaped cross section that wraps around the core material 6 is made of fiber reinforced resin, and in this embodiment, a flange portion that extends toward the center of the floor 2 in the lower part thereof. 7 is extended.
  • Pre-formed side forming materials 5 on both sides are arranged at predetermined positions in a cavity of a forming die (not shown), and the reinforcing fiber base material constituting the floor forming material 3 is the flange portion 7 of the side forming material 5.
  • One side surface 8 forming the slope of each side forming material 5, and three different surfaces of the top surface 9 of each side forming material 5 are disposed in the mold.
  • Resin matrix resin
  • the resin injected into the reinforcing fiber base disposed in the mold is impregnated, and the resin is cured, whereby the floor forming material 3 is RTM-molded.
  • the floor forming material 3 in which the reinforcing fiber base is impregnated with the resin and the side forming material 5 are joined and integrated to form a vehicle floor made of fiber reinforced resin.
  • the structure 1 is produced.
  • the floor forming material 3 and the side forming material 5 are joined and integrated at least on two different surfaces (three surfaces in this embodiment).
  • the fiber-reinforced resin vehicle floor structure 1 as a whole is surely and firmly joined and integrated, and mechanical characteristics such as high bending rigidity and torsional rigidity are exhibited.
  • the above-mentioned joining and integration are performed by using the RTM molding of the floor forming material 3, it is made of a target fiber reinforced resin in a simple molding process equivalent to the case of only the RTM molding of the floor forming material.
  • the vehicle floor structure 1 is easily and reliably manufactured.
  • an angle ⁇ (shown in FIG. 1) between at least two different surfaces for joining and integrating the floor forming material 3 and the side forming material 5, for example, a horizontal plane forming portion of the floor forming material 3 is used.
  • the angle ⁇ formed by the other surface is preferably in the range of 10 to 120 degrees with respect to the horizontal plane, and more preferably in the range of 30 to 95 degrees. Of these, a range of 70 to 90 degrees is more preferable, and a range of 75 to 85 degrees is particularly preferable.
  • the side forming material 11 is provided with a flange portion 12 similar to the above, and an extended side surface portion 13 in which a slope portion forming the side surface of the side forming material 11 extends upward as it is.
  • the floor forming material 14 is joined and integrated with two different surfaces of the flange portion 12 and the side surface portion of the side forming material 11 including the extended side surface portion 13.
  • an adhesive layer 16 may be interposed between the reinforcing fiber bases constituting the floor forming material 3.
  • the adhesive used for the adhesive layer 16 for example, a film adhesive can be used.
  • the above-mentioned preformed body or preform can be disposed so as to be surrounded by the reinforcing fiber base material constituting the floor forming material 17.
  • the floor forming material 17 and the side forming material 5 can be more reliably and firmly joined and integrated.
  • the side forming material may be prepared in advance so that the side portion of the finally produced fiber reinforced resin vehicle floor structure has a cross-sectional shape of a closed cross section.
  • the material itself can be prepared as a molded body or a preformed body having an open portion in the cross section. Examples of the case where the side forming material prepared in advance is manufactured as a molded body or a preformed body having an open portion in the cross section are illustrated in FIGS.
  • the side forming material 21 is prepared in advance as a molded body or a preformed body having the opening 22, and the floor forming material 23 is joined to the side forming material 21 using RTM molding. It is integrated and the closed cross-section structure of a side part is finally completed.
  • RTM molding of the floor forming material 23 in order to keep the reinforcing fiber base impregnated with the resin in a predetermined form in the mold, particularly in the open portion 22 portion (that is, the closed section structure).
  • a balloon-shaped core that can be expanded and contracted is arranged, and RTM molding is performed in a state where the inside of the core is pressurized. it can.
  • a relatively thick resin film is disposed so as to close the open portion 22, and the RTM is applied to the resin film from the floor forming material 23 side during the RTM molding of the floor forming material 23. It is also possible to support a reinforcing fiber substrate for molding.
  • the side forming material 31 is manufactured in advance as a molded body or a preformed body having the open portion 32, and the side forming material 31 has a flange extending in the horizontal direction as shown in FIG. 3. Part 33 and an extended side surface part 34 extending obliquely upward, and a floor forming material 35 is joined to and integrated with this side forming material 31 using RTM molding, and finally the side portion A closed cross-sectional structure is completed.
  • the side forming material 41 is produced in advance as a substantially L-shaped molded body or preform having an open portion 42, and a flange portion 43 extending in the horizontal direction is provided below the side forming material 41.
  • a flange portion 44 extending in the horizontal direction is also provided at the upper portion, and a floor forming material 45 is joined and integrated to the side forming material 41 using RTM molding, and finally the side portion A closed cross-sectional structure is completed.
  • the side forming material 51 can be formed in a shape extending longer toward the center of the floor forming material 52.
  • the joint between the side forming material 51 and the floor forming material 52 can be made longer, and the joint strength of both members, and hence the mechanical properties of the entire structure can be improved. become.
  • the fiber reinforced resin vehicle floor structure and its manufacturing method according to the present invention can be applied to any vehicle aimed at weight reduction and the like.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Composite Materials (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

La présente invention concerne un procédé permettant de fabriquer une structure de plancher de véhicule résineux renforcé de fibres dans laquelle un matériau formant le plancher et un matériau formant les côtés dont la section transversale prend la forme d'une section transversale fermée sont intégrés, le matériau formant les côtés étant créé en tant que compact prémoulé ou compact préliminaire, le matériau formant les côtés étant disposé dans une position prédéterminée à l'intérieur d'un moule, un substrat fibreux de renforcement constituant le matériau formant le plancher étant disposé à l'intérieur du moule de façon à être en contact avec le matériau formant les côtés dans au moins deux surfaces différentes, et une résine étant versée et imprégnée dans le substrat fibreux de renforcement pour intégrer, par liaison, le matériau formant les côtés et le matériau formant le plancher imprégnés de la résine ; et une structure de plancher de véhicule résineux renforcé de fibres fabriquée par le présent procédé. Une partie latérale présentant une section transversale fermée est liée d'un seul tenant de manière fiable et ferme à la partie plancher, et des propriétés mécaniques élevées peuvent être obtenues dans la structure de plancher de véhicule résineux renforcé de fibres.
PCT/JP2014/056667 2013-03-27 2014-03-13 Structure de plancher de véhicule résineux renforcé de fibres et procédé de fabrication associé WO2014156682A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2014512579A JPWO2014156682A1 (ja) 2013-03-27 2014-03-13 繊維強化樹脂製車両用フロア構造体およびその製造方法

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JP2013-066020 2013-03-27
JP2013066020 2013-03-27

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160059904A1 (en) * 2013-05-16 2016-03-03 Bayerische Motoren Werke Aktiengesellschaft Crash Structure for a Vehicle
CN111469936A (zh) * 2020-04-26 2020-07-31 中航复合材料有限责任公司 一种乘用车复合材料前地板单体底板及其制备方法
EP3805078A4 (fr) * 2018-06-05 2021-06-16 Nissan Motor Co., Ltd. Structure de carrosserie de véhicule et procédé pour assembler une carrosserie de véhicule

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57130772U (fr) * 1981-02-09 1982-08-14
JPH01145785U (fr) * 1988-03-31 1989-10-06
JPH0310973U (fr) * 1989-06-20 1991-02-01
JPH0347283U (fr) * 1989-09-18 1991-05-01
JP2008068587A (ja) * 2006-09-15 2008-03-27 Nissan Motor Co Ltd Ｆｒｐ製成形品、その成形方法並びにその成形型
JP2010155403A (ja) * 2008-12-29 2010-07-15 Toyota Motor Corp 構造体及びレジントランスファモールディング成形方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57130772U (fr) * 1981-02-09 1982-08-14
JPH01145785U (fr) * 1988-03-31 1989-10-06
JPH0310973U (fr) * 1989-06-20 1991-02-01
JPH0347283U (fr) * 1989-09-18 1991-05-01
JP2008068587A (ja) * 2006-09-15 2008-03-27 Nissan Motor Co Ltd Ｆｒｐ製成形品、その成形方法並びにその成形型
JP2010155403A (ja) * 2008-12-29 2010-07-15 Toyota Motor Corp 構造体及びレジントランスファモールディング成形方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160059904A1 (en) * 2013-05-16 2016-03-03 Bayerische Motoren Werke Aktiengesellschaft Crash Structure for a Vehicle
EP3805078A4 (fr) * 2018-06-05 2021-06-16 Nissan Motor Co., Ltd. Structure de carrosserie de véhicule et procédé pour assembler une carrosserie de véhicule
CN111469936A (zh) * 2020-04-26 2020-07-31 中航复合材料有限责任公司 一种乘用车复合材料前地板单体底板及其制备方法

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