JP6955872B2 - Fiber reinforced plastic molded product - Google Patents

Fiber reinforced plastic molded product Download PDF

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JP6955872B2
JP6955872B2 JP2017028879A JP2017028879A JP6955872B2 JP 6955872 B2 JP6955872 B2 JP 6955872B2 JP 2017028879 A JP2017028879 A JP 2017028879A JP 2017028879 A JP2017028879 A JP 2017028879A JP 6955872 B2 JP6955872 B2 JP 6955872B2
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fiber
reinforced resin
molded product
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JP2018134751A (en
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幸宏 濱田
幸宏 濱田
照明 青木
照明 青木
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Renault SAS
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本発明は、繊維強化樹脂成形品に関する。 The present invention relates to a fiber reinforced resin molded product.

従来から、複合材料の一種であるＦＲＰ（Fiber Reinforced Plastics）を含んで構成される繊維強化樹脂成形品が公知である（例えば、特許文献１参照）。 Conventionally, a fiber-reinforced resin molded product composed of FRP (Fiber Reinforced Plastics), which is a kind of composite material, is known (see, for example, Patent Document 1).

特許文献１には、芯材たるハニカムコアの両面にＦＲＰ製の内面板と外面板が接着され、所定曲率を備えた曲面ハニカムパネルの製造方法が記載されている。この製造方法では、予め、所定曲率を備えたその製造用の型により、スペーサー用のハニカムコアの両面にＦＲＰ板が添着されると共に、製造される上記曲面ハニカムパネルより上記内面板の分だけ肉厚が薄い、スペーサーパネルが加圧成形される。それからまず、上記型により上記外面板を加圧成形すると共に、上記型に該スペーサーパネルを重ね、その外表面側にて上記内面板を加圧成形する。そして次に、このように成形された上記内面板と外面板間に上記芯材たるハニカムコアを接着剤を介し挟み込み、上記型により加圧成形加工を実施することにより、上記曲面ハニカムパネルが得られる。 Patent Document 1 describes a method for manufacturing a curved honeycomb panel having an inner surface plate and an outer surface plate made of FRP bonded to both sides of a honeycomb core serving as a core material and having a predetermined curvature. In this manufacturing method, FRP plates are attached to both sides of the honeycomb core for the spacer by the manufacturing mold having a predetermined curvature in advance, and the amount of meat is increased by the amount of the inner surface plate from the manufactured curved honeycomb panel. The thin spacer panel is pressure molded. Then, first, the outer surface plate is pressure-molded by the mold, the spacer panel is laminated on the mold, and the inner surface plate is pressure-molded on the outer surface side thereof. Next, the honeycomb core, which is the core material, is sandwiched between the inner surface plate and the outer surface plate thus formed via an adhesive, and pressure molding is performed by the mold to obtain the curved honeycomb panel. Be done.

特許第３２０４５２９号公報Japanese Patent No. 3204529

繊維強化樹脂成形品は、一般的に、板状に形成されるコア材と、コア材の両面にそれぞれ形成される繊維強化樹脂層とから構成される。このような繊維強化樹脂成形品では、コア材が、他の部位（一般部）よりも曲率が大きい部位（湾曲部）を有する場合、曲率が大きい湾曲部においては、コア材の板厚が小さく、外部からの衝撃に対する剛性が一般的に弱くなる。 The fiber-reinforced resin molded product is generally composed of a core material formed in a plate shape and a fiber-reinforced resin layer formed on both sides of the core material. In such a fiber-reinforced resin molded product, when the core material has a portion (curved portion) having a larger curvature than other portions (general portion), the plate thickness of the core material is small in the curved portion having a large curvature. , The rigidity against external impact is generally weakened.

そこで、本発明は、外部からの衝撃に対する剛性を向上させることができる繊維強化樹脂成形品を提供することを目的とする。 Therefore, an object of the present invention is to provide a fiber-reinforced resin molded product capable of improving the rigidity against an external impact.

本発明に係る繊維強化樹脂成形品は、板状に形成され、一般部と一般部よりも曲率が大きい湾曲部とを有するコア材と、コア材の両面の内の少なくとも一方の面に形成される第一繊維強化樹脂層とを備える。繊維強化樹脂成形品は、コア材の湾曲部と第一繊維強化樹脂層との間に形成される第二繊維強化樹脂層をさらに備え、第二繊維強化樹脂層に含有される第二繊維の伸び率は、第一繊維強化樹脂層に含有される第一繊維の伸び率よりも高い。 The fiber-reinforced resin molded product according to the present invention is formed in a plate shape, and is formed on at least one of both sides of a core material having a general portion and a curved portion having a curvature larger than that of the general portion. It is provided with a first fiber reinforced resin layer. The fiber-reinforced resin molded product further includes a second fiber-reinforced resin layer formed between the curved portion of the core material and the first fiber-reinforced resin layer, and the second fiber contained in the second fiber-reinforced resin layer. The elongation rate is higher than the elongation rate of the first fiber contained in the first fiber reinforced resin layer.

本発明によれば、外部からの衝撃に対する剛性を向上させることができる繊維強化樹脂成形品を提供することができる。 According to the present invention, it is possible to provide a fiber reinforced resin molded product capable of improving the rigidity against an external impact.

本発明の実施形態に係る繊維強化樹脂成形品の斜視図である。It is a perspective view of the fiber reinforced resin molded article which concerns on embodiment of this invention. 図１のＡ−Ａ線断面図である。FIG. 1 is a cross-sectional view taken along the line AA of FIG. 図１のＢ−Ｂ線断面図である。FIG. 1 is a cross-sectional view taken along the line BB of FIG. 本発明の実施形態に係る繊維強化樹脂成形品に衝撃荷重を負荷した状態を示す図１のＢ−Ｂ線断面に対応する断面図である。FIG. 5 is a cross-sectional view corresponding to the cross section taken along line BB of FIG. 1, showing a state in which an impact load is applied to the fiber-reinforced resin molded product according to the embodiment of the present invention. 本発明の別の実施形態に係る繊維強化樹脂成形品を示す図１のＢ−Ｂ線断面に対応する断面図である。It is sectional drawing corresponding to the BB line cross section of FIG. 1 which shows the fiber-reinforced resin molded article which concerns on another Embodiment of this invention.

以下、本発明の実施形態を図面と共に詳述する。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

本発明の実施形態に係る繊維強化樹脂成形品を、図１から図４に基づいて説明する。 The fiber-reinforced resin molded product according to the embodiment of the present invention will be described with reference to FIGS. 1 to 4.

本発明の実施形態に係る繊維強化樹脂成形品は、例えば、フード（ボンネット）、ドアパネル、バンパー、トランクリッド、リアゲート、フェンダパネル、サイドボディパネル、ルーフパネル等の車両用構成部材に適用することができる。また、本発明の実施形態に係る繊維強化樹脂成形品は、車両用構成部材に限定されず、各種構成部材に適用することもできる。 The fiber-reinforced resin molded product according to the embodiment of the present invention can be applied to vehicle components such as a hood (bonnet), a door panel, a bumper, a trunk lid, a rear gate, a fender panel, a side body panel, and a roof panel. can. Further, the fiber-reinforced resin molded product according to the embodiment of the present invention is not limited to vehicle components, and can be applied to various components.

図１に示す繊維強化樹脂成形品１０は、いわゆるフードアウターであり、フードインナー１１（図２参照）と組み合わされて車両のフードを構成するようになっている。なお、図１において、矢印ＦＲは車両の前方を示し、矢印ＵＰＲは車両の上方を示し、矢印ＲＨは車両の右側方を示すものとする。 The fiber-reinforced resin molded product 10 shown in FIG. 1 is a so-called hood outer, and is combined with a hood inner 11 (see FIG. 2) to form a vehicle hood. In FIG. 1, the arrow FR indicates the front of the vehicle, the arrow UPR indicates the upper side of the vehicle, and the arrow RH indicates the right side of the vehicle.

フードアウターを構成する繊維強化樹脂成形品１０は、繊維強化樹脂成形品１０全体としては上方側に向かって凸形状となるように滑らかに湾曲した形状を有している。また、繊維強化樹脂成形品１０（フードアウター）の車両幅方向の左右両側部には、上方側に向かって凸形状のビード部１２が車両の前後方向に沿って形成されている。このビード部１２は、後述する湾曲部１６，１７，１８によって形状が規定されており、ビード部１２の稜線部分（頂部）が車両の前後方向に延びるキャラクターラインとして主に機能する。 The fiber-reinforced resin molded product 10 constituting the hood outer has a shape that is smoothly curved so as to be convex upward toward the fiber-reinforced resin molded product 10 as a whole. Further, on the left and right side portions of the fiber reinforced resin molded product 10 (hood outer) in the vehicle width direction, bead portions 12 having a convex shape toward the upper side are formed along the front-rear direction of the vehicle. The shape of the bead portion 12 is defined by curved portions 16, 17, and 18, which will be described later, and the ridgeline portion (top) of the bead portion 12 mainly functions as a character line extending in the front-rear direction of the vehicle.

図２及び図３に示すように、繊維強化樹脂成形品１０は、板状に形成されるコア材１３と、コア材１３の両面の内の少なくとも一方の面に形成される第一繊維強化樹脂層１４とを備えて主に構成されている。本実施形態では、第一繊維強化樹脂層１４は、コア材１３の両面にそれぞれ形成されている。 As shown in FIGS. 2 and 3, the fiber reinforced resin molded product 10 is a plate-shaped core material 13 and a first fiber reinforced resin formed on at least one of both sides of the core material 13. It is mainly composed of a layer 14. In the present embodiment, the first fiber reinforced resin layer 14 is formed on both sides of the core material 13.

コア材１３は、一般部１５と、一般部１５よりも曲率が大きい（曲率半径が小さい）湾曲部１６，１７，１８とを有する。すなわち、一般部１５は、湾曲部１６，１７，１８よりも曲率が小さい（曲率半径が大きい）部位を示し、湾曲部１６，１７，１８は、一般部１５よりも曲率が大きい（曲率半径が小さい）部位を示すものとする。コア材１３の一般部１５における板厚は、湾曲部１６，１７，１８における板厚よりも大きく、例えば５ｍｍ程度とされる。その一方で、コア材１３の湾曲部１６，１７，１８における板厚は、一般部１５における板厚よりも小さく、例えば２ｍｍ程度とされる。このようなコア材１３としては、アルミハニカムやペーパーハニカム等の多孔質体、発泡ポリウレタン等の発泡体を用いることができる。 The core material 13 has a general portion 15 and curved portions 16, 17, 18 having a larger curvature (smaller radius of curvature) than the general portion 15. That is, the general portion 15 indicates a portion having a smaller curvature (larger radius of curvature) than the curved portions 16, 17, 18 and the curved portions 16, 17, 18 have a larger curvature (having a larger radius of curvature) than the general portion 15. It shall indicate a (small) part. The plate thickness of the general portion 15 of the core material 13 is larger than the plate thickness of the curved portions 16, 17 and 18, and is set to, for example, about 5 mm. On the other hand, the plate thickness of the curved portions 16, 17, and 18 of the core material 13 is smaller than the plate thickness of the general portion 15, for example, about 2 mm. As such a core material 13, a porous body such as an aluminum honeycomb or a paper honeycomb, or a foam such as polyurethane foam can be used.

第一繊維強化樹脂層１４は、第一繊維及び第一樹脂を有して構成されている。この第一繊維強化樹脂層１４としては、例えば、炭素繊維強化樹脂（ＣＦＲＰ）を用いることができる。すなわち、第一繊維は、例えば炭素繊維から構成される。第一繊維としては、ファブリック材（織物）、ＵＤ材（単一性方向材）、ＵＤ材を複数積層したものを用いることができる。その一方で、第一樹脂としては、熱硬化性樹脂や熱可塑性樹脂等、種々の合成樹脂を用いることができる。上面側（フード外面側）の第一繊維強化樹脂層１４は、例えば、板厚が０．４４ｍｍ程度とされ、［０°／４５°／−４５°／９０°］等の疑似等方性の積層構成とすることが考えられる。その一方で、下面側（フード内面側）の第一繊維強化樹脂層１４は、例えば、板厚が０．４４ｍｍ程度とされ、［９０°／−４５°／４５°／０°］等の疑似等方性の積層構成とすることが考えられる。 The first fiber reinforced resin layer 14 is composed of the first fiber and the first resin. As the first fiber reinforced resin layer 14, for example, carbon fiber reinforced resin (CFRP) can be used. That is, the first fiber is composed of, for example, carbon fiber. As the first fiber, a fabric material (woven fabric), a UD material (unique directional material), and a plurality of UD materials laminated can be used. On the other hand, as the first resin, various synthetic resins such as thermosetting resin and thermoplastic resin can be used. The first fiber reinforced resin layer 14 on the upper surface side (outer surface side of the hood) has, for example, a plate thickness of about 0.44 mm and is pseudo-isotropic such as [0 ° / 45 ° / −45 ° / 90 °]. It is conceivable to have a laminated structure. On the other hand, the first fiber reinforced resin layer 14 on the lower surface side (inner surface side of the hood) has, for example, a plate thickness of about 0.44 mm, and is simulated as [90 ° / −45 ° / 45 ° / 0 °]. It is conceivable to have an isotropic laminated structure.

図３に示すように、繊維強化樹脂成形品１０は、コア材１３の湾曲部１６，１７，１８と第一繊維強化樹脂層１４との間に形成される第二繊維強化樹脂層１９を備えている。この第二繊維強化樹脂層１９は、繊維強化樹脂成形品１０の上下両面の内、外部からの衝撃荷重が負荷された場合に圧縮側となる面（圧縮応力が作用する面）に形成することが好ましい。本実施形態では、第二繊維強化樹脂層１９は、繊維強化樹脂成形品１０の上下両面の第一繊維強化樹脂層１４，１４の内の上面側（フード外面側）のみに形成されている。 As shown in FIG. 3, the fiber-reinforced resin molded product 10 includes a second fiber-reinforced resin layer 19 formed between the curved portions 16, 17, 18 of the core material 13 and the first fiber-reinforced resin layer 14. ing. The second fiber-reinforced resin layer 19 is formed on the upper and lower surfaces of the fiber-reinforced resin molded product 10 on the surface that becomes the compression side (the surface on which the compressive stress acts) when an impact load from the outside is applied. Is preferable. In the present embodiment, the second fiber reinforced resin layer 19 is formed only on the upper surface side (outer surface side of the hood) of the first fiber reinforced resin layers 14 and 14 on both the upper and lower sides of the fiber reinforced resin molded product 10.

第二繊維強化樹脂層１９は、第二繊維及び第二樹脂を有して構成されている。この第二繊維強化樹脂層１９としては、例えば、ガラス繊維強化樹脂（ＧＦＲＰ）、アラミド繊維強化樹脂（ＡＦＲＰ）を用いることができる。すなわち、第二繊維は、例えば、ガラス繊維又はアラミド繊維から構成される。要するに、第二繊維は、第一繊維よりも伸び率（破断時伸び）が高い繊維から構成される。第二繊維としては、ファブリック材（織物）、ＵＤ材（単一性方向材）、ＵＤ材を複数積層したものを用いることができる。その一方で、第二樹脂としては、熱硬化性樹脂や熱可塑性樹脂等、種々の合成樹脂を用いることができる。そして、第二繊維強化樹脂層１９は、例えば、板厚が第一繊維強化樹脂層１４と同程度から半分程度とされる。 The second fiber reinforced resin layer 19 is composed of the second fiber and the second resin. As the second fiber reinforced resin layer 19, for example, a glass fiber reinforced resin (GFRP) or an aramid fiber reinforced resin (AFRP) can be used. That is, the second fiber is composed of, for example, glass fiber or aramid fiber. In short, the second fiber is composed of fibers having a higher elongation rate (elongation at break) than the first fiber. As the second fiber, a fabric material (woven fabric), a UD material (unique directional material), and a plurality of UD materials laminated can be used. On the other hand, as the second resin, various synthetic resins such as a thermosetting resin and a thermoplastic resin can be used. The thickness of the second fiber reinforced resin layer 19 is, for example, about the same as or about half that of the first fiber reinforced resin layer 14.

繊維強化樹脂成形品１０を製造する方法としては、例えば、ハンドレイアップ法、オートクレーブ法、真空バッグ法、ＲＴＭ（Resin Transfer Molding）法等の一般的なＦＲＰ成形法を用いることが可能である。 As a method for producing the fiber reinforced resin molded product 10, for example, a general FRP molding method such as a hand lay-up method, an autoclave method, a vacuum bag method, or an RTM (Resin Transfer Molding) method can be used.

以下に、本実施形態による作用効果を説明する。 The effects of this embodiment will be described below.

（１）繊維強化樹脂成形品１０は、板状に形成され、一般部１５と一般部１５よりも曲率が大きい湾曲部１６，１７，１８とを有するコア材１３と、コア材１３の両面の内の少なくとも一方の面に形成され、第一繊維を有する第一繊維強化樹脂層１４とを備える。繊維強化樹脂成形品１０は、コア材１３の湾曲部１６，１７，１８と第一繊維強化樹脂層１４との間に形成され、第二繊維を有する第二繊維強化樹脂層１９をさらに備え、第二繊維の伸び率は、第一繊維の伸び率よりも高い。 (1) The fiber-reinforced resin molded product 10 is formed in a plate shape and has a core material 13 having a general portion 15 and curved portions 16, 17, 18 having a curvature larger than that of the general portion 15, and both sides of the core material 13. The first fiber reinforced resin layer 14 formed on at least one surface of the inside and having the first fiber is provided. The fiber-reinforced resin molded product 10 is further provided with a second fiber-reinforced resin layer 19 formed between the curved portions 16, 17, 18 of the core material 13 and the first fiber-reinforced resin layer 14 and having a second fiber. The elongation rate of the second fiber is higher than the elongation rate of the first fiber.

図４に示すように、例えば、繊維強化樹脂成形品１０（フードアウター）のビード部１２の稜線部分（湾曲部１７）に対して、上面側から衝撃荷重が負荷された場合、上面側においては圧縮応力Ｓｃが作用し、下面側においては引張応力Ｓｔが作用する。この場合、図示はしないが、ビード部１２の稜線部分（湾曲部１７）よりも車両の左右両側方に位置する湾曲部１６，１８に対しても、上面側においては圧縮応力Ｓｃが作用し、下面側においては引張応力Ｓｔが作用する。さらに、繊維強化樹脂成形品１０のビード部１２の稜線部分（湾曲部１７）に対しては、面外方向応力（板厚方向応力）Ｓｏｐも作用する。なお、図４において、符号２０は歩行者保護試験等で使用されるインパクターを示す。 As shown in FIG. 4, for example, when an impact load is applied from the upper surface side to the ridge line portion (curved portion 17) of the bead portion 12 of the fiber reinforced resin molded product 10 (hood outer), the upper surface side is The compressive stress Sc acts, and the tensile stress St acts on the lower surface side. In this case, although not shown, the compressive stress Sc acts on the curved portions 16 and 18 located on both the left and right sides of the vehicle from the ridgeline portion (curved portion 17) of the bead portion 12 on the upper surface side. Tensile stress St acts on the lower surface side. Further, an out-of-plane stress (stress in the plate thickness direction) Sop also acts on the ridgeline portion (curved portion 17) of the bead portion 12 of the fiber-reinforced resin molded product 10. In FIG. 4, reference numeral 20 indicates an impactor used in a pedestrian protection test or the like.

例えば炭素繊維は、引張強度が比較的高く、圧縮強度及び、面外荷重に対する面外強度（層間強度）は比較的低い。また、コア材１３の一般部１５においては、圧縮強度及び引張強度の寄与度が高く、一般部１５よりも曲率が大きい湾曲部１６，１７，１８においては、面外強度の寄与度が高い。このため、コア材１３の湾曲部１６，１７，１８においては、外部からの衝撃に対する剛性が一般的に弱くなる。 For example, carbon fiber has a relatively high tensile strength, and has a relatively low compressive strength and an out-of-plane strength (interlayer strength) with respect to an out-of-plane load. Further, the general portion 15 of the core material 13 has a high contribution of compressive strength and tensile strength, and the curved portions 16, 17 and 18 having a larger curvature than the general portion 15 have a high contribution of out-of-plane strength. Therefore, in the curved portions 16, 17, and 18 of the core material 13, the rigidity against an external impact is generally weakened.

本実施形態に係る繊維強化樹脂成形品１０では、コア材１３の湾曲部１６，１７，１８と第一繊維強化樹脂層１４との間に、第一繊維よりも伸び率が高い第二繊維を有する第二繊維強化樹脂層１９が形成されている。第二繊維強化樹脂層１９に含有された第二繊維（例えば、ガラス繊維、アラミド繊維）は、第一繊維（例えば、炭素繊維）よりも伸び率が高いため、外部からの衝撃に対し、下面側、上面側から生じる内部歪みを吸収することができる。 In the fiber-reinforced resin molded product 10 according to the present embodiment, a second fiber having a higher elongation rate than the first fiber is formed between the curved portions 16, 17, 18 of the core material 13 and the first fiber-reinforced resin layer 14. The second fiber reinforced resin layer 19 to have is formed. The second fiber (for example, glass fiber, aramid fiber) contained in the second fiber reinforced resin layer 19 has a higher elongation rate than the first fiber (for example, carbon fiber), and therefore has a lower surface against an external impact. It is possible to absorb the internal strain generated from the side and the upper surface side.

したがって、本実施形態によれば、外部からの衝撃に対する剛性を向上させることができる繊維強化樹脂成形品１０を提供することが可能となる。 Therefore, according to the present embodiment, it is possible to provide the fiber reinforced resin molded product 10 capable of improving the rigidity against an external impact.

また、第二繊維強化樹脂層１９がコア材１３の湾曲部１６，１７，１８と第一繊維強化樹脂層１４との間に形成されるため、型を用いた成形時のコア材１３の割れ等を抑制することができ、その結果、繊維強化樹脂成形品１０の製造コストを低減することができる。 Further, since the second fiber reinforced resin layer 19 is formed between the curved portions 16, 17, 18 of the core material 13 and the first fiber reinforced resin layer 14, the core material 13 is cracked during molding using a mold. As a result, the manufacturing cost of the fiber-reinforced resin molded product 10 can be reduced.

（２）第一繊維強化樹脂層１４に含有される第一繊維は、炭素繊維であり、第二繊維強化樹脂層１９に含有される第二繊維は、ガラス繊維又はアラミド繊維である。 (2) The first fiber contained in the first fiber reinforced resin layer 14 is a carbon fiber, and the second fiber contained in the second fiber reinforced resin layer 19 is a glass fiber or an aramid fiber.

このように第一繊維強化樹脂層１４及び第二繊維強化樹脂層１９を構成することにより、繊維強化樹脂成形品１０において、外部からの衝撃に対する剛性を向上させることが可能になる。すなわち、ガラス繊維及びアラミド繊維は、炭素繊維よりも伸び率が高く、外部からの衝撃に対し、下面側、上面側から生じる内部歪みを吸収することができる。したがって、本実施形態によれば、コア材１３の湾曲部１６，１７，１８を補剛することができ、繊維強化樹脂成形品１０において、外部からの衝撃に対する剛性を向上させることが可能になる。 By forming the first fiber reinforced resin layer 14 and the second fiber reinforced resin layer 19 in this way, it is possible to improve the rigidity of the fiber reinforced resin molded product 10 against an impact from the outside. That is, the glass fiber and the aramid fiber have a higher elongation rate than the carbon fiber, and can absorb the internal strain generated from the lower surface side and the upper surface side against an external impact. Therefore, according to the present embodiment, the curved portions 16, 17, and 18 of the core material 13 can be stiffened, and the rigidity of the fiber-reinforced resin molded product 10 against an external impact can be improved. ..

ところで、本発明の繊維強化樹脂成形品は前述の実施形態に例をとって説明したが、この実施形態に限ることなく本発明の要旨を逸脱しない範囲で他の実施形態を各種採用することができる。 By the way, the fiber-reinforced resin molded product of the present invention has been described by taking an example in the above-described embodiment, but the present invention is not limited to this embodiment, and various other embodiments may be adopted without departing from the gist of the present invention. can.

例えば、前述の実施形態では、コア材の上下両面の内の上面側のみに「第二繊維強化樹脂層」を形成する例を示したが、これに限定されない。図５に示すように、コア材の上下両面の内の下面側のみに「第二繊維強化樹脂層」を形成するようにしてもよい。また、図示はしないが、コア材の上下両面にそれぞれ「第二繊維強化樹脂層」を形成するようにしてもよい。要するに、「第二繊維強化樹脂層」は、コア材の上下両面の内、外部からの衝撃荷重が負荷された場合に圧縮側となる面（圧縮応力が作用する面）に形成することが好ましい。 For example, in the above-described embodiment, an example in which the "second fiber reinforced resin layer" is formed only on the upper surface side of the upper and lower surfaces of the core material is shown, but the present invention is not limited to this. As shown in FIG. 5, the "second fiber reinforced resin layer" may be formed only on the lower surface side of the upper and lower surfaces of the core material. Further, although not shown, "second fiber reinforced resin layers" may be formed on both the upper and lower surfaces of the core material. In short, it is preferable to form the "second fiber reinforced resin layer" on the upper and lower surfaces of the core material, which is the surface to be compressed when an impact load from the outside is applied (the surface on which compressive stress acts). ..

１０ 繊維強化樹脂成形品
１３ コア材
１４ 第一繊維強化樹脂層
１５ 一般部
１６ 湾曲部
１７ 湾曲部
１８ 湾曲部
１９ 第二繊維強化樹脂層 10 Fiber reinforced resin molded product 13 Core material 14 First fiber reinforced resin layer 15 General part 16 Curved part 17 Curved part 18 Curved part 19 Second fiber reinforced resin layer

Claims (2)

繊維強化樹脂成形品をＲＴＭ成形法により成形する、繊維強化樹脂成形品を製造する方法において、
前記繊維強化樹脂成形品は、
板状に形成され、一般部と前記一般部よりも曲率が大きい湾曲部とを有するコア材と、
前記コア材の両面の内の少なくとも一方の面に形成され、第一繊維を有する第一繊維強化樹脂層と、
前記コア材の前記湾曲部と前記第一繊維強化樹脂層との間に少なくとも形成され、伸び率が前記第一繊維の伸び率よりも高い第二繊維を有する第二繊維強化樹脂層とを備え、
前記コア材の前記湾曲部における板厚は、前記一般部における板厚よりも小さく形成されており、
前記第二繊維強化樹脂層は、前記コア材の両面の内、外部からの衝撃荷重が付加された場合に圧縮側となる面に形成される
ことを特徴とする繊維強化樹脂成形品の製造方法。 In a method for manufacturing a fiber-reinforced resin molded product, in which a fiber-reinforced resin molded product is molded by an RTM molding method.
The fiber-reinforced resin molded product is
A core material formed in a plate shape and having a general portion and a curved portion having a curvature larger than that of the general portion.
A first fiber reinforced resin layer formed on at least one of both sides of the core material and having the first fiber,
At least formed between the curved portion and the first fiber-reinforced resin layer of the core material, and a second fiber-reinforced resin layer having a high secondary fibers than the elongation elongation of said first fiber ,
The plate thickness of the core material at the curved portion is formed to be smaller than the plate thickness at the general portion.
A method for producing a fiber-reinforced resin molded product, wherein the second fiber-reinforced resin layer is formed on the surface of both sides of the core material that becomes the compression side when an impact load from the outside is applied. .. 前記第一繊維は、炭素繊維であり、
前記第二繊維は、ガラス繊維又はアラミド繊維である
ことを特徴とする請求項１に記載の繊維強化樹脂成形品の製造方法。 The first fiber is a carbon fiber and
The method for producing a fiber-reinforced resin molded product according to claim 1, wherein the second fiber is a glass fiber or an aramid fiber.
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