JP2021187015A - Bonded body and method for producing the same - Google Patents

Bonded body and method for producing the same Download PDF

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JP2021187015A
JP2021187015A JP2020092516A JP2020092516A JP2021187015A JP 2021187015 A JP2021187015 A JP 2021187015A JP 2020092516 A JP2020092516 A JP 2020092516A JP 2020092516 A JP2020092516 A JP 2020092516A JP 2021187015 A JP2021187015 A JP 2021187015A
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reinforced resin
mold
fiber
ridge portion
fiber reinforced
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祐基 白鳥
Yuki Shiratori
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Toyoda Iron Works Co Ltd
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Toyoda Iron Works Co Ltd
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  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Moulding By Coating Moulds (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Standing Axle, Rod, Or Tube Structures Coupled By Welding, Adhesion, Or Deposition (AREA)
  • Laminated Bodies (AREA)

Abstract

To provide a bonded body capable of suppressing a decrease in bond strength, and a method for producing the bonded body.SOLUTION: A bumper member 20 includes: a bumper body 21 having a ridge part 24 that forms a ridge; and a fiber reinforced resin part 26 that extends along an outer surface of the ridge part 24 and covers the outer surface, and is adhesively fixed to the ridge part 24. The bumper body 21 is made of a metal material. The fiber reinforced resin part 26 is made of a fiber reinforced resin material having a larger coefficient of thermal expansion than that of the metal material.SELECTED DRAWING: Figure 1

Description

本発明は、ベース部材に被覆部材が接合されている接合体およびその製造方法に関するものである。 The present invention relates to a bonded body in which a covering member is bonded to a base member and a method for manufacturing the same.

従来より、製品の補強や装飾のために、ベース部材の外面の一部を覆うように同ベース部材に被覆部材を接合することが実用されている。特許文献1に記載の接合体では、金属製のバンパー部材の側面を覆う態様で、同バンパー部材に繊維強化樹脂製の補強部材が接着されている。 Conventionally, in order to reinforce or decorate a product, it has been practically used to join a covering member to the base member so as to cover a part of the outer surface of the base member. In the bonded body described in Patent Document 1, a reinforcing member made of fiber reinforced resin is adhered to the bumper member in a manner of covering the side surface of the metal bumper member.

特開2018−16281号公報Japanese Unexamined Patent Publication No. 2018-16281

金属製のバンパー部材と繊維強化樹脂製の補強部材とでは、熱膨張率が異なるため、温度変化に伴う熱変形量(熱膨張量、熱収縮量)も異なる。上記接合体では、そうした熱変形量の相異に起因して、バンパー部材と補強部材との接合部分に繰り返し応力が発生する等して、接合強度の低下を招くおそれがある。 Since the coefficient of thermal expansion is different between the metal bumper member and the fiber-reinforced resin reinforcing member, the amount of thermal deformation (thermal expansion amount, thermal shrinkage amount) due to a temperature change is also different. In the above-mentioned joint body, due to such a difference in the amount of thermal deformation, repeated stress may be generated at the joint portion between the bumper member and the reinforcing member, which may lead to a decrease in the joint strength.

本発明は、そうした実情に鑑みてなされたものであり、その目的は、接合強度の低下を抑制できる接合体、および同接合体の製造方法を提供することにある。 The present invention has been made in view of such circumstances, and an object of the present invention is to provide a bonded body capable of suppressing a decrease in bonding strength and a method for producing the bonded body.

上記課題を解決するための接合体は、第1材料によって構成されて、突条をなす突条部を有するベース部材と、前記第1材料よりも熱膨張率の大きい第2材料によって構成されて、前記突条部の外面に沿って延びて同外面を覆う形状をなして、前記突条部に接合された被覆部材と、を備える。 The joint for solving the above-mentioned problems is composed of a first material, a base member having a ridge portion forming a ridge, and a second material having a larger coefficient of thermal expansion than the first material. A covering member that extends along the outer surface of the ridge and covers the outer surface, and is joined to the ridge.

上記課題を解決するための接合体の製造方法は、上記接合体の製造に用いる製造方法であり、前記第2材料として、熱硬化性樹脂を含む材料を用い、第1型および第2型を有する金型装置を用いて、前記第1型と前記第2型との間における同第1型側のスペースに前記ベース部材が位置するとともに前記第2型側のスペースに前記被覆部材が位置する態様で、前記接合体を成形し、前記金型装置による前記接合体の成形を、前記第2型の温度を前記第1型の温度よりも高くした状態で実行する。 The method for manufacturing the bonded body for solving the above-mentioned problems is the manufacturing method used for manufacturing the above-mentioned bonded body, and a material containing a thermosetting resin is used as the second material, and the first type and the second type are used. Using the mold device, the base member is located in the space on the first mold side between the first mold and the second mold, and the covering member is located in the space on the second mold side. In the embodiment, the joint is formed, and the molding of the joint by the mold device is performed in a state where the temperature of the second mold is higher than the temperature of the first mold.

一実施形態のバンパー部材の(a)は側断面図であり、(b)は(a)の一部を拡大した拡大側断面図。(A) is a side sectional view of the bumper member of one embodiment, and (b) is an enlarged side sectional view which is a part of (a) enlarged. バンパー部材の斜視図。Perspective view of the bumper member. バンパー部材の分解斜視図。An exploded perspective view of the bumper member. 熱プレス装置の側端面図。Side view of the heat press device. 型締め状態の金型装置の側端面図。Side view of the mold device in the mold-clamped state. バンパー部材の製造工程を示すフローチャート。The flowchart which shows the manufacturing process of a bumper member. プリプレグの斜視図。Perspective view of the prepreg. 繊維強化樹脂部の収縮態様を示す略図。The schematic which shows the shrinkage mode of the fiber reinforced resin part. 他の実施形態のバンパー部材の側断面図。Side sectional view of the bumper member of another embodiment. 他の実施形態のバンパー部材の側断面図。Side sectional view of the bumper member of another embodiment. 他の実施形態のバンパー部材の側断面図。Side sectional view of the bumper member of another embodiment.

以下、接合体およびその製造方法の一実施形態について説明する。
図1〜図3に示すように、バンパー部材20は、金属製のバンパー本体21が繊維強化樹脂製の繊維強化樹脂部26によって補強された構造になっている。このバンパー部材20は、車両の前部または後部に設けられて衝撃を吸収する緩衝部材である。本実施形態では、バンパー部材20が接合体に相当し、バンパー本体21がベース部材に相当し、繊維強化樹脂部26が被覆部材に相当する。
Hereinafter, an embodiment of a bonded body and a method for manufacturing the same will be described.
As shown in FIGS. 1 to 3, the bumper member 20 has a structure in which a metal bumper main body 21 is reinforced by a fiber reinforced resin portion 26 made of a fiber reinforced resin. The bumper member 20 is a cushioning member provided at the front or rear of the vehicle to absorb an impact. In the present embodiment, the bumper member 20 corresponds to the bonded body, the bumper main body 21 corresponds to the base member, and the fiber reinforced resin portion 26 corresponds to the covering member.

バンパー本体21は、車両前方側の平板部22と車両後方側の突出部23とが一体形成された構造になっている。これら平板部22および突出部23は、溶融亜鉛鍍金鋼板(SCGA)や冷間圧延鋼板(SPC)によって構成されている。平板部22は、車幅方向および上下方向に延びる平板状になっている。突出部23における上下方向の中央部分は、車両後方に向けて凸の突条をなす部分である突条部24になっている。この突条部24は、断面円弧状で車幅方向に延びている。また、突出部23における上下方向の両端部分は、車幅方向および上下方向に延びる平板状のフランジ25になっている。本実施形態では、突出部23の各フランジ25の前面が上記平板部22の後面に溶接固定されている。これにより、バンパー本体21は断面略D字状になっている。 The bumper main body 21 has a structure in which a flat plate portion 22 on the front side of the vehicle and a protruding portion 23 on the rear side of the vehicle are integrally formed. The flat plate portion 22 and the protruding portion 23 are made of a hot-dip galvanized steel plate (SCGA) or a cold-rolled steel plate (SPC). The flat plate portion 22 has a flat plate shape extending in the vehicle width direction and the vertical direction. The central portion of the protruding portion 23 in the vertical direction is a ridge portion 24 which is a portion forming a convex ridge toward the rear of the vehicle. The ridge portion 24 has an arcuate cross section and extends in the vehicle width direction. Further, both ends of the protruding portion 23 in the vertical direction are flat plate-shaped flanges 25 extending in the vehicle width direction and the vertical direction. In the present embodiment, the front surface of each flange 25 of the protrusion 23 is welded and fixed to the rear surface of the flat plate portion 22. As a result, the bumper body 21 has a substantially D-shaped cross section.

繊維強化樹脂部26は、熱硬化性の樹脂材料(エポキシ系の樹脂材料)を母材として連続炭素繊維を含む炭素繊維強化樹脂(CFRP)によって構成されている。繊維強化樹脂部26は、断面円弧状で車幅方向に延びている。 The fiber reinforced resin portion 26 is made of a carbon fiber reinforced resin (CFRP) containing continuous carbon fibers using a thermosetting resin material (epoxy-based resin material) as a base material. The fiber reinforced resin portion 26 has an arcuate cross section and extends in the vehicle width direction.

繊維強化樹脂部26は、連続繊維の延びる方向(以下、繊維方向)の異なる2つの層(内層部27および外層部28)を有する2層構造になっている。
繊維強化樹脂部26における上記突条部24に近い側の内層部27では、繊維方向と突条部24の延設方向とが同一になっている。具体的には、内層部27では、図3中に矢印Aで示すように、繊維方向と車幅方向とが一致している。
The fiber reinforced resin portion 26 has a two-layer structure having two layers (inner layer portion 27 and outer layer portion 28) in which continuous fibers extend in different directions (hereinafter referred to as fiber directions).
In the inner layer portion 27 of the fiber reinforced resin portion 26 on the side closer to the ridge portion 24, the fiber direction and the extension direction of the ridge portion 24 are the same. Specifically, in the inner layer portion 27, as shown by an arrow A in FIG. 3, the fiber direction and the vehicle width direction coincide with each other.

一方、繊維強化樹脂部26における上記突条部24から遠い側の外層部28では、その各部における繊維方向と突条部24の延設方向とが直交している。具体的には、図3中に矢印Bで示すように、外層部28の内部において連続繊維は、突出部23の延設方向と直交する断面(直交断面)において同突出部23の外面に沿って円弧状で延びている。 On the other hand, in the outer layer portion 28 on the side far from the ridge portion 24 in the fiber reinforced resin portion 26, the fiber direction in each portion and the extension direction of the ridge portion 24 are orthogonal to each other. Specifically, as shown by an arrow B in FIG. 3, the continuous fibers inside the outer layer portion 28 are along the outer surface of the protruding portion 23 in a cross section (orthogonal cross section) orthogonal to the extending direction of the protruding portion 23. It extends in an arc shape.

繊維強化樹脂部26は、接着層29を介して、バンパー本体21の突出部23の外面に接着固定されている。これにより、繊維強化樹脂部26は、バンパー本体21の突条部24の外面に沿って延びて同外面を覆う態様で、同突条部24に一体に設けられている。 The fiber reinforced resin portion 26 is adhesively fixed to the outer surface of the protruding portion 23 of the bumper main body 21 via the adhesive layer 29. As a result, the fiber reinforced resin portion 26 extends along the outer surface of the ridge portion 24 of the bumper main body 21 and covers the outer surface thereof, and is integrally provided with the ridge portion 24.

接着層29は熱硬化性の樹脂材料(エポキシ系の樹脂材料)によって構成されている。接着層29を構成する樹脂材料としては、バンパー本体21と炭素繊維強化樹脂との接着に適した樹脂材料が採用されている。 The adhesive layer 29 is made of a thermosetting resin material (epoxy-based resin material). As the resin material constituting the adhesive layer 29, a resin material suitable for adhering the bumper main body 21 and the carbon fiber reinforced resin is adopted.

本実施形態では、バンパー本体21の突出部23と繊維強化樹脂部26とが、熱プレス装置を用いた熱プレスによって、具体的にはPCM(プリプレグ・コンプレッション・モールディング)成形法を通じて一体に成形される。 In the present embodiment, the protruding portion 23 of the bumper main body 21 and the fiber reinforced resin portion 26 are integrally molded by a hot press using a hot press device, specifically through a PCM (prepreg compression molding) molding method. To.

以下、それら突出部23および繊維強化樹脂部26の一体成形に用いる熱プレス装置について説明する。
図4に示すように、熱プレス装置30は、固定型41および可動型43によって構成された金型装置40を有している。金型装置40における固定型41と可動型43との間には、バンパー部材20が成形されるスペースが区画形成される。
Hereinafter, a hot press device used for integrally molding the protruding portion 23 and the fiber reinforced resin portion 26 will be described.
As shown in FIG. 4, the heat press device 30 has a mold device 40 composed of a fixed die 41 and a movable die 43. A space for forming the bumper member 20 is formed between the fixed mold 41 and the movable mold 43 in the mold device 40.

固定型41の上面には突条の凸部44が設けられている。この凸部44の外面と前記突条部24の内面とは略同一の形状になっている。金型装置40による成形に際して、固定型41の上部には、突条部24の内部に固定型41の凸部44が嵌まる態様で、突出部23がセットされる。また、金型装置40による成形に際しては、突条部24の外面に、接着層29になる接着シート29Aと繊維強化樹脂部26になるプリプレグ26Aとがセットされる。なお、プリプレグ26Aは、連続炭素繊維に熱硬化性の樹脂材料を含浸させたシート状の材料を繊維方向が直交する態様で2枚重ねたものである。 The convex portion 44 of the ridge is provided on the upper surface of the fixed mold 41. The outer surface of the convex portion 44 and the inner surface of the ridge portion 24 have substantially the same shape. At the time of molding by the mold device 40, the protruding portion 23 is set on the upper portion of the fixed mold 41 in such a manner that the convex portion 44 of the fixed mold 41 fits inside the ridge portion 24. Further, when molding by the mold device 40, the adhesive sheet 29A to be the adhesive layer 29 and the prepreg 26A to be the fiber reinforced resin portion 26 are set on the outer surface of the ridge portion 24. The prepreg 26A is made by stacking two sheets of continuous carbon fibers impregnated with a thermosetting resin material in a manner in which the fiber directions are orthogonal to each other.

可動型43は、固定型41に対して上下方向(型締め方向[図4の下方]および型開き方向[図4の上方])に相対移動可能になっている。可動型43の下面には、断面U字状で延びる凹部45が設けられている。この凹部45における車両上方側の部分の内面形状は、繊維強化樹脂部26の外面と同一の断面円弧状になっている。 The movable mold 43 can move relative to the fixed mold 41 in the vertical direction (mold tightening direction [lower side of FIG. 4] and mold opening direction [upper side of FIG. 4]). The lower surface of the movable mold 43 is provided with a recess 45 extending in a U-shaped cross section. The inner surface shape of the portion of the recess 45 on the upper side of the vehicle has the same cross-sectional arc shape as the outer surface of the fiber reinforced resin portion 26.

金型装置40を用いてバンパー部材20(詳しくは、繊維強化樹脂部26)を成形する際には、油圧シリンダー(図示略)によって可動型43を固定型41に近づく方向(図4の下方)に移動させるといったように、金型装置40の型締めが実行される。 When molding the bumper member 20 (specifically, the fiber reinforced resin portion 26) using the mold device 40, the movable mold 43 is brought closer to the fixed mold 41 by a hydraulic cylinder (not shown) (lower part of FIG. 4). Molding of the mold device 40 is executed, such as moving to.

そして、図5に示すように、金型装置40が型締め状態になると、固定型41と可動型43との間に突出部23および繊維強化樹脂部26が成形されるスペースが区画形成される。そして、このスペースの内部において、詳しくは固定型41側のスペースに突出部23が位置するとともに可動型43側のスペースに繊維強化樹脂部26が位置する態様で、突出部23および繊維強化樹脂部26が一体成形される。 Then, as shown in FIG. 5, when the mold device 40 is in the mold clamping state, a space for forming the protrusion 23 and the fiber reinforced resin portion 26 is formed between the fixed mold 41 and the movable mold 43. .. Then, inside this space, in detail, the protrusion 23 and the fiber reinforced resin portion are located in the space on the fixed mold 41 side and the fiber reinforced resin portion 26 in the space on the movable mold 43 side. 26 is integrally molded.

図4に示すように、熱プレス装置30は、固定型41および可動型43を加熱する加熱装置50を有している。この加熱装置50により、固定型41の温度と可動型43の温度とが各別に設定される。加熱装置50は、固定型41の内部や可動型43の内部に所定温度のオイルを供給することによって、固定型41の温度や可動型43の温度を調整するものである。本実施形態では、固定型41の温度と可動型43の温度とが共に、接着層29になる接着シート29Aや繊維強化樹脂部26になるプリプレグ26Aを適正に硬化させることの可能な温度に設定される。また、固定型41の温度は、可動型43の温度よりも所定温度(例えば10〜30度)だけ低く設定される。 As shown in FIG. 4, the heat press device 30 has a heating device 50 for heating the fixed mold 41 and the movable mold 43. By this heating device 50, the temperature of the fixed mold 41 and the temperature of the movable mold 43 are set separately. The heating device 50 adjusts the temperature of the fixed mold 41 and the temperature of the movable mold 43 by supplying oil having a predetermined temperature to the inside of the fixed mold 41 and the inside of the movable mold 43. In the present embodiment, both the temperature of the fixed mold 41 and the temperature of the movable mold 43 are set to a temperature at which the adhesive sheet 29A which becomes the adhesive layer 29 and the prepreg 26A which becomes the fiber reinforced resin portion 26 can be appropriately cured. Will be done. Further, the temperature of the fixed mold 41 is set lower than the temperature of the movable mold 43 by a predetermined temperature (for example, 10 to 30 degrees).

以下、本実施形態のバンパー部材20の製造工程について説明する。
図6に示すように、バンパー部材20の製造に際しては先ず、プリプレグ26Aと、接着シート29Aと、プレス成形された突出部23(図1参照)とが用意される(ステップS1)。なお、図7に示すように、プリプレグ26Aとしては、別途の成形装置によって断面略円弧状に予備成形されたものが用意される。
Hereinafter, the manufacturing process of the bumper member 20 of the present embodiment will be described.
As shown in FIG. 6, when manufacturing the bumper member 20, first, a prepreg 26A, an adhesive sheet 29A, and a press-molded protrusion 23 (see FIG. 1) are prepared (step S1). As shown in FIG. 7, as the prepreg 26A, a prepreg 26A preformed into a substantially arcuate cross section by a separate molding apparatus is prepared.

そして、金型装置40が型開き状態にされるとともに、同金型装置40の内部に突出部23、接着シート29A、およびプリプレグ26Aがセットされる(ステップS2)。具体的には、図4に示すように、下方側から突出部23、接着シート29A、およびプリプレグ26Aの順に並ぶように、固定型41の上に突出部23、接着シート29Aおよびプリプレグ26Aが置かれる。 Then, the mold device 40 is opened, and the protrusion 23, the adhesive sheet 29A, and the prepreg 26A are set inside the mold device 40 (step S2). Specifically, as shown in FIG. 4, the protrusion 23, the adhesive sheet 29A, and the prepreg 26A are placed on the fixed mold 41 so as to arrange the protrusion 23, the adhesive sheet 29A, and the prepreg 26A in this order from the lower side. Be struck.

その後、金型装置40が型締め状態にされる(図6のステップS3)。これにより、図5に示すように、熱プレスによって突出部23と繊維強化樹脂部26とが一体に成形されるようになる。具体的には、接着シート29Aが加熱硬化されて接着層29になり、プリプレグ26Aが、突出部23(詳しくは、接着層29)の外面と可動型43の凹部45の内面との隙間で所定形状に成形されるとともに加熱硬化されて繊維強化樹脂部26になる。 After that, the mold device 40 is put into the mold clamping state (step S3 in FIG. 6). As a result, as shown in FIG. 5, the protruding portion 23 and the fiber reinforced resin portion 26 are integrally molded by the hot press. Specifically, the adhesive sheet 29A is heat-cured to become the adhesive layer 29, and the prepreg 26A is predetermined by the gap between the outer surface of the protruding portion 23 (specifically, the adhesive layer 29) and the inner surface of the recess 45 of the movable mold 43. It is molded into a shape and heat-cured to become a fiber-reinforced resin portion 26.

その後、金型装置40が型開き状態にされるとともに、同金型装置40の内部から一体成形された突出部23および繊維強化樹脂部26が取り出される(図4のステップS4)。 After that, the mold apparatus 40 is opened, and the integrally molded protrusion 23 and the fiber reinforced resin portion 26 are taken out from the inside of the mold apparatus 40 (step S4 in FIG. 4).

そして、予め用意されている平板部22に、繊維強化樹脂部26が一体成形された突出部23の各フランジ25が溶接固定される(ステップS5)。
本実施形態では、このようにして、平板部22および突出部23を有するバンパー本体21が繊維強化樹脂部26によって補強された構造のバンパー部材20(図2参照)が形成される。
Then, each flange 25 of the protruding portion 23 integrally formed with the fiber reinforced resin portion 26 is welded and fixed to the flat plate portion 22 prepared in advance (step S5).
In the present embodiment, the bumper member 20 (see FIG. 2) having a structure in which the bumper main body 21 having the flat plate portion 22 and the protruding portion 23 is reinforced by the fiber reinforced resin portion 26 is formed in this way.

以下、本実施形態のバンパー部材20による作用について説明する。
本実施形態のバンパー部材20では、繊維強化樹脂部26を構成する繊維強化樹脂材料(詳しくは、その母材の熱硬化樹脂材料)の熱膨張率が、バンパー本体21を構成する金属材料の熱膨張率よりも大きくなっている。そして、繊維強化樹脂部26は、バンパー本体21の突条部24の外面に沿って延びて同外面を覆う態様で、突条部24の外面に接着固定されている。
Hereinafter, the operation of the bumper member 20 of the present embodiment will be described.
In the bumper member 20 of the present embodiment, the coefficient of thermal expansion of the fiber-reinforced resin material (specifically, the thermosetting resin material of the base material) constituting the fiber-reinforced resin portion 26 is the heat of the metal material constituting the bumper main body 21. It is larger than the expansion rate. The fiber-reinforced resin portion 26 extends along the outer surface of the ridge portion 24 of the bumper main body 21 and covers the outer surface, and is adhesively fixed to the outer surface of the ridge portion 24.

バンパー部材20では、その温度低下に際して、熱膨張率の小さい金属材料によって構成されるバンパー部材20の熱収縮量と比較して、比較的熱膨張率の繊維強化樹脂材料によって構成される繊維強化樹脂部26の熱収縮量が大きくなる。バンパー部材20によれば、そうした特性を利用する等、バンパー本体21と繊維強化樹脂部26との熱膨張率の差を利用して、バンパー本体21の突条部24の外面に沿って延びる繊維強化樹脂部26の内部に、常に圧縮応力が生じた状態にすることができる。 The bumper member 20 is made of a fiber-reinforced resin having a relatively thermal expansion rate as compared with the amount of heat shrinkage of the bumper member 20 made of a metal material having a small coefficient of thermal expansion when the temperature is lowered. The amount of heat shrinkage of the portion 26 becomes large. According to the bumper member 20, a fiber extending along the outer surface of the ridge portion 24 of the bumper main body 21 by utilizing the difference in the coefficient of thermal expansion between the bumper main body 21 and the fiber reinforced resin portion 26, such as utilizing such characteristics. It is possible to keep the inside of the reinforced resin portion 26 in a state where compressive stress is always generated.

これにより、繊維強化樹脂部26の内面によってバンパー本体21の突条部24の外面が締め付けられる状態、言い換えれば、繊維強化樹脂部26の内面が突条部24の外面に押し付けられた状態にすることができる。したがって、繊維強化樹脂部26がバンパー本体21の突条部24から剥離し難い構造にすることができ、バンパー本体21と繊維強化樹脂部26との接合強度の低下を抑制することができる。 As a result, the outer surface of the ridge portion 24 of the bumper main body 21 is tightened by the inner surface of the fiber reinforced resin portion 26, that is, the inner surface of the fiber reinforced resin portion 26 is pressed against the outer surface of the ridge portion 24. be able to. Therefore, the fiber-reinforced resin portion 26 can have a structure that is difficult to peel off from the ridge portion 24 of the bumper main body 21, and it is possible to suppress a decrease in the bonding strength between the bumper main body 21 and the fiber-reinforced resin portion 26.

ここで、繊維強化樹脂は、熱プレス装置30による成形後において温度が低下する際に、母材の樹脂材料が収縮するのに対して、強化用の連続繊維は略収縮しない。
本実施形態では、繊維強化樹脂部26の内層部27の内部における連続繊維の繊維方向(図3の矢印A参照)と、バンパー部材20の突条部24の延設方向とが同一になっている。そのため、繊維強化樹脂部26の成形後における温度低下に際して、内層部27の母材の樹脂材料が収縮すると、図8中に矢印Cで示すように、隣合う連続繊維の間隔が短くなるように内層部27が収縮するようになる。これに伴って、上記突出部23の延設方向と直交する断面(以下、直交断面)における内層部27の延設長が短くなる。
Here, in the fiber-reinforced resin, when the temperature drops after molding by the hot press device 30, the resin material of the base material shrinks, whereas the continuous fibers for strengthening do not shrink substantially.
In the present embodiment, the fiber direction of the continuous fiber inside the inner layer portion 27 of the fiber reinforced resin portion 26 (see arrow A in FIG. 3) and the extending direction of the ridge portion 24 of the bumper member 20 are the same. There is. Therefore, when the resin material of the base material of the inner layer portion 27 shrinks when the temperature of the fiber reinforced resin portion 26 drops after molding, the distance between adjacent continuous fibers becomes shorter as shown by an arrow C in FIG. The inner layer portion 27 contracts. Along with this, the extending length of the inner layer portion 27 in the cross section orthogonal to the extending direction of the protruding portion 23 (hereinafter referred to as an orthogonal cross section) becomes shorter.

これに対して、繊維強化樹脂部26の外層部28の内部における連続繊維の繊維方向(図3の矢印B参照)と、バンパー部材20の突条部24の延設方向とは直交している。これにより、外層部28の内部においては、連続繊維が、上記直交断面で突出部23の外面に沿って延びている。この連続繊維は、繊維強化樹脂部26の成形後における温度低下に際して略収縮しない。そのため、このとき連続繊維によって外層部28の変形が規制されることにより、同外層部28は上記直交断面において略収縮せず、同直交断面における外層部28の延設長は短くならない。 On the other hand, the fiber direction of the continuous fiber inside the outer layer portion 28 of the fiber reinforced resin portion 26 (see arrow B in FIG. 3) and the extending direction of the ridge portion 24 of the bumper member 20 are orthogonal to each other. .. As a result, inside the outer layer portion 28, the continuous fibers extend along the outer surface of the protruding portion 23 in the orthogonal cross section. The continuous fibers do not substantially shrink when the temperature of the fiber reinforced resin portion 26 drops after molding. Therefore, at this time, the deformation of the outer layer portion 28 is restricted by the continuous fibers, so that the outer layer portion 28 does not substantially shrink in the orthogonal cross section, and the extended length of the outer layer portion 28 in the orthogonal cross section is not shortened.

このように本実施形態では、繊維強化樹脂部26の成形後における温度低下に際して、図8中に矢印Cで示すように、上記直交断面における内層部27の延設長が短くなるのに対して、同直交断面における外層部28の延設長は短くならない。こうした延設長の変化によって、内層部27および外層部28を有する繊維強化樹脂部26の内部に、同繊維強化樹脂部26を曲げ方向内側(図8中に矢印Dで示す方向)に曲げる態様の内部応力(圧縮応力)を生じさせることができる。そして、この内部応力により、繊維強化樹脂部26の内面によってバンパー本体21の突条部24の外面が締め付けられた状態にすることができる。こうした構成によっても、繊維強化樹脂部26がバンパー本体21の突条部24から剥離し難い構造にすることができる。 As described above, in the present embodiment, when the temperature of the fiber reinforced resin portion 26 is lowered after molding, the extended length of the inner layer portion 27 in the orthogonal cross section is shortened as shown by an arrow C in FIG. , The extended length of the outer layer portion 28 in the same orthogonal cross section is not shortened. A mode in which the fiber-reinforced resin portion 26 is bent inward in the bending direction (direction indicated by arrow D in FIG. 8) inside the fiber-reinforced resin portion 26 having the inner layer portion 27 and the outer layer portion 28 due to such a change in the extension length. Internal stress (compressive stress) can be generated. Then, due to this internal stress, the outer surface of the ridge portion 24 of the bumper main body 21 can be tightened by the inner surface of the fiber reinforced resin portion 26. Even with such a configuration, the fiber-reinforced resin portion 26 can be made into a structure that is difficult to peel off from the ridge portion 24 of the bumper main body 21.

本実施形態では、バンパー本体21の突条部24に繊維強化樹脂部26が接着された接着部分においては、前記直交断面における突条部24の外面の断面形状と繊維強化樹脂部26の断面形状とが共に円弧状になっている。 In the present embodiment, in the bonded portion where the fiber reinforced resin portion 26 is adhered to the ridge portion 24 of the bumper main body 21, the cross-sectional shape of the outer surface of the ridge portion 24 and the cross-sectional shape of the fiber reinforced resin portion 26 in the orthogonal cross section. Both are arcuate.

これにより、繊維強化樹脂部26の内面によってバンパー本体21の突条部24の外面が締め付けられた状態になると、上記接着部分の全面にわたりバランス良く、繊維強化樹脂部26の内面が突条部24の外面に押し付けられた状態になる。そのため、繊維強化樹脂部26とバンパー本体21の突条部24との接合強度の低下を好適に抑えることができる。 As a result, when the outer surface of the ridge portion 24 of the bumper body 21 is tightened by the inner surface of the fiber reinforced resin portion 26, the inner surface of the fiber reinforced resin portion 26 is well-balanced over the entire surface of the bonded portion, and the ridge portion 24 is formed. It will be in a state of being pressed against the outer surface of. Therefore, it is possible to suitably suppress a decrease in the bonding strength between the fiber reinforced resin portion 26 and the ridge portion 24 of the bumper main body 21.

通常、金型装置によって合成樹脂製の部材を成形する際には、同部材の各部のうち、硬化するタイミングが遅い部分ほど収縮の度合いが大きくなり易い。
本実施形態では、繊維強化樹脂部26の形成材料として、熱硬化性樹脂材料を母材とする炭素繊維強化樹脂が用いられる。そして、金型装置40によって突出部23および繊維強化樹脂部26を一体成形する工程が、可動型43と固定型41とに温度差を付与した状態で、詳しくは、可動型43の温度を固定型41の温度よりも高くした状態で実行される。
Normally, when a member made of synthetic resin is molded by a mold device, the degree of shrinkage tends to increase as the curing timing of each part of the member is later.
In the present embodiment, a carbon fiber reinforced resin using a thermosetting resin material as a base material is used as the forming material of the fiber reinforced resin portion 26. Then, in the step of integrally molding the protruding portion 23 and the fiber reinforced resin portion 26 by the mold device 40, the temperature of the movable mold 43 is fixed in detail in a state where a temperature difference is applied between the movable mold 43 and the fixed mold 41. It is executed in a state where the temperature is higher than the temperature of the mold 41.

これにより、金型装置40による繊維強化樹脂部26の成形に際しては、繊維強化樹脂部26(詳しくは、母材の熱硬化性樹脂材料)の熱硬化が、比較的高温の可動型43の側から低温の固定型41の側に向けて進行するようになる。言い換えれば、このとき繊維強化樹脂部26の熱硬化は、同繊維強化樹脂部26の曲げ方向における外方側から内方側に向けて進行するようになる。 As a result, when the fiber reinforced resin portion 26 is molded by the mold device 40, the thermosetting of the fiber reinforced resin portion 26 (specifically, the thermosetting resin material of the base material) is heat-cured on the side of the movable mold 43 having a relatively high temperature. It will proceed toward the side of the low temperature fixed mold 41. In other words, at this time, the thermosetting of the fiber reinforced resin portion 26 proceeds from the outer side to the inner side in the bending direction of the fiber reinforced resin portion 26.

これにより、繊維強化樹脂部26の収縮度合いを、曲げ方向の内方側ほど大きくすることができる。そのため、金型装置40による繊維強化樹脂部26の成形に際して、同繊維強化樹脂部26を、内方への曲げ度合いが大きくなるように収縮させることができる。したがって本実施形態によれば、繊維強化樹脂部26の内面によってバンパー本体21の突条部24の外面を締め付けるようになる態様で、同繊維強化樹脂部26を成形することができる。 As a result, the degree of shrinkage of the fiber reinforced resin portion 26 can be increased toward the inner side in the bending direction. Therefore, when the fiber reinforced resin portion 26 is molded by the mold device 40, the fiber reinforced resin portion 26 can be shrunk so that the degree of inward bending becomes large. Therefore, according to the present embodiment, the fiber reinforced resin portion 26 can be molded in such a manner that the outer surface of the ridge portion 24 of the bumper main body 21 is tightened by the inner surface of the fiber reinforced resin portion 26.

本実施形態では、繊維強化樹脂部26がバンパー本体21の突条部24の外面に接着固定されている。一般に、固定部材を被固定部材に接着固定する場合には、接着剤が硬化するまでの間、専用の治具によって固定部材および被固定部材を保持する等して、被固定部材に固定部材が押し付けられた状態を保持することが求められることが多い。 In the present embodiment, the fiber reinforced resin portion 26 is adhesively fixed to the outer surface of the ridge portion 24 of the bumper main body 21. Generally, when the fixing member is adhesively fixed to the fixed member, the fixing member is attached to the fixed member by holding the fixing member and the fixed member with a dedicated jig until the adhesive is cured. It is often required to maintain the pressed state.

本実施形態によれば、金型装置40によって突出部23と繊維強化樹脂部26とを一体成形することにより、繊維強化樹脂部26の内面がバンパー本体21の突条部24の外面に押し付けられた状態にすることができる。そのため、金型装置40による成形後において特段の作業を実行することなく、接着シート29Aを適正に硬化させて接着層29を形成することができる。このように本実施形態では、バンパー部材20の製造に際して、接着層29が硬化するまでの期間にわたって繊維強化樹脂部26がバンパー本体21の突条部24に押し付けられた状態を保持する工程や、同状態を保持するための治具が不要になる。したがって、バンパー部材20の製造サイクルの短縮を図ることができる。 According to the present embodiment, the protrusion 23 and the fiber reinforced resin portion 26 are integrally molded by the mold device 40, so that the inner surface of the fiber reinforced resin portion 26 is pressed against the outer surface of the ridge portion 24 of the bumper main body 21. Can be in a state of being. Therefore, the adhesive sheet 29A can be appropriately cured to form the adhesive layer 29 without performing any special work after molding by the mold apparatus 40. As described above, in the present embodiment, in the manufacturing of the bumper member 20, the step of holding the fiber-reinforced resin portion 26 pressed against the ridge portion 24 of the bumper main body 21 for a period until the adhesive layer 29 is cured, and No jig is required to maintain the same state. Therefore, the manufacturing cycle of the bumper member 20 can be shortened.

以上説明したように、本実施形態によれば、以下に記載する効果が得られる。
(1)繊維強化樹脂部26を構成する繊維強化樹脂材料の熱膨張率が、バンパー本体21を構成する金属材料の熱膨張率よりも大きくなっている。そして、繊維強化樹脂部26を、バンパー本体21の突条部24の外面に沿って延びて同外面を覆う態様で、突条部24の外面に接着固定した。これにより、繊維強化樹脂部26の内面によってバンパー本体21の突条部24の外面が締め付けられた状態にすることができるため、バンパー本体21と繊維強化樹脂部26との接合強度の低下を抑制することができる。
As described above, according to the present embodiment, the effects described below can be obtained.
(1) The coefficient of thermal expansion of the fiber-reinforced resin material constituting the fiber-reinforced resin portion 26 is larger than the coefficient of thermal expansion of the metal material constituting the bumper main body 21. Then, the fiber reinforced resin portion 26 was adhesively fixed to the outer surface of the ridge portion 24 in such a manner that the fiber reinforced resin portion 26 extended along the outer surface of the ridge portion 24 of the bumper main body 21 to cover the outer surface. As a result, the outer surface of the ridge portion 24 of the bumper main body 21 can be tightened by the inner surface of the fiber reinforced resin portion 26, so that the decrease in the bonding strength between the bumper main body 21 and the fiber reinforced resin portion 26 is suppressed. can do.

(2)繊維強化樹脂部26の内層部27の内部における連続繊維の繊維方向と、バンパー部材20の突条部24の延設方向とは同一になっている。また、繊維強化樹脂部26の外層部28の内部における連続繊維の繊維方向と、バンパー部材20の突条部24の延設方向とは直交している。そのため、内層部27および外層部28を有する繊維強化樹脂部26の内部に、同繊維強化樹脂部26を曲げ方向内側に曲げる態様の内部応力を生じさせることができる。そして、この内部応力により、繊維強化樹脂部26の内面によってバンパー本体21の突条部24の外面が締め付けられた状態にすることができる。 (2) The fiber direction of the continuous fiber inside the inner layer portion 27 of the fiber reinforced resin portion 26 and the extending direction of the ridge portion 24 of the bumper member 20 are the same. Further, the fiber direction of the continuous fiber inside the outer layer portion 28 of the fiber reinforced resin portion 26 and the extending direction of the ridge portion 24 of the bumper member 20 are orthogonal to each other. Therefore, an internal stress in a mode of bending the fiber-reinforced resin portion 26 inward in the bending direction can be generated inside the fiber-reinforced resin portion 26 having the inner layer portion 27 and the outer layer portion 28. Then, due to this internal stress, the outer surface of the ridge portion 24 of the bumper main body 21 can be tightened by the inner surface of the fiber reinforced resin portion 26.

(3)バンパー本体21の突条部24に繊維強化樹脂部26が接着された接着部分において、上記直交断面における突条部24の外面の断面形状と繊維強化樹脂部26の断面形状とが共に円弧状になっている。そのため、繊維強化樹脂部26の内面によってバンパー本体21の突条部24の外面を締め付ける状態にすることにより、上記接着部分の全面にわたりバランス良く、繊維強化樹脂部26の内面が突条部24の外面に押し付けられた状態にすることができる。 (3) In the bonded portion where the fiber reinforced resin portion 26 is adhered to the ridge portion 24 of the bumper main body 21, both the cross-sectional shape of the outer surface of the ridge portion 24 and the cross-sectional shape of the fiber reinforced resin portion 26 in the orthogonal cross section are It has an arc shape. Therefore, by tightening the outer surface of the ridge portion 24 of the bumper body 21 with the inner surface of the fiber reinforced resin portion 26, the inner surface of the fiber reinforced resin portion 26 is well-balanced over the entire surface of the bonded portion, and the inner surface of the ridge portion 24 is the ridge portion 24. It can be pressed against the outer surface.

(4)バンパー部材20の製造に際して、接着層29が硬化するまでの期間にわたって繊維強化樹脂部26がバンパー本体21の突条部24に押し付けられた状態を保持する工程や、同状態を保持するための治具が不要になる。したがって、バンパー部材20の製造サイクルの短縮を図ることができる。 (4) In the manufacturing of the bumper member 20, the step of holding the fiber-reinforced resin portion 26 pressed against the ridge portion 24 of the bumper main body 21 and maintaining the same state for a period until the adhesive layer 29 is cured. No jig is required. Therefore, the manufacturing cycle of the bumper member 20 can be shortened.

(5)繊維強化樹脂部26の形成材料として、熱硬化性樹脂材料を母材とする炭素繊維強化樹脂が用いられる。そして、金型装置40によって突出部23および繊維強化樹脂部26を一体成形する工程が、可動型43の温度を固定型41の温度よりも高くした状態で実行される。これにより、繊維強化樹脂部26の内面によってバンパー本体21の突条部24の外面を締め付けるようになる態様で、金型装置40によって繊維強化樹脂部26を成形することができる。 (5) As a material for forming the fiber reinforced resin portion 26, a carbon fiber reinforced resin using a thermosetting resin material as a base material is used. Then, the step of integrally molding the protruding portion 23 and the fiber reinforced resin portion 26 by the mold device 40 is executed in a state where the temperature of the movable mold 43 is higher than the temperature of the fixed mold 41. As a result, the fiber reinforced resin portion 26 can be molded by the mold device 40 in such a manner that the outer surface of the ridge portion 24 of the bumper main body 21 is tightened by the inner surface of the fiber reinforced resin portion 26.

なお、上記実施形態は、以下のように変更して実施することができる。上記実施形態および以下の変更例は、技術的に矛盾しない範囲で互いに組み合わせて実施することができる。 The above embodiment can be modified and implemented as follows. The above embodiment and the following modification examples can be implemented in combination with each other within a technically consistent range.

・図9に示すバンパー部材60のように、繊維強化樹脂部66として、前記直交断面(図9に示す断面)におけるバンパー本体21の突条部24の外面の全長にわたって延びる断面形状のものを用いるようにしてもよい。上記構成によれば、バンパー本体21の突条部24の根元まで覆うように繊維強化樹脂部66が設けられる。そのため、突条部24の外面を、広い範囲にわたり、繊維強化樹脂部66の内面によって締め付けられた状態にすることができる。したがって、繊維強化樹脂部66とバンパー本体21の突出部23との接合強度の低下を好適に抑えることができる。 -Like the bumper member 60 shown in FIG. 9, as the fiber reinforced resin portion 66, a cross-sectional shape extending over the entire outer surface of the ridge portion 24 of the bumper main body 21 in the orthogonal cross section (cross section shown in FIG. 9) is used. You may do so. According to the above configuration, the fiber reinforced resin portion 66 is provided so as to cover the base of the ridge portion 24 of the bumper main body 21. Therefore, the outer surface of the ridge portion 24 can be brought into a state of being tightened by the inner surface of the fiber reinforced resin portion 66 over a wide range. Therefore, it is possible to suitably suppress a decrease in the bonding strength between the fiber reinforced resin portion 66 and the protruding portion 23 of the bumper main body 21.

・上記実施形態にかかるバンパー部材およびその製造方法は、車両後方に向けて凸の突条をなす部分である突条部を複数有するバンパー部材にも適用することができる。図10に、そうしたバンパー部材70の一例を示す。図10に示すように、バンパー部材70は、2つの突条部74を有している。それら突条部74は、いすれも突端を含む先端部分が断面略円弧状をなして車幅方向に延びており、車両の上下方向において平行に並ぶ態様で設けられている。そして、各突条部74の外面には、断面略円弧状で車幅方向に延びる繊維強化樹脂部76が、突条部74の外面に沿って延びて同外面を覆う態様で接着固定されている。 -The bumper member and the manufacturing method thereof according to the above embodiment can also be applied to a bumper member having a plurality of ridge portions which are portions forming convex ridges toward the rear of the vehicle. FIG. 10 shows an example of such a bumper member 70. As shown in FIG. 10, the bumper member 70 has two ridges 74. The ridges 74 are provided in such a manner that the tip portions including the ridges have a substantially arcuate cross section and extend in the vehicle width direction, and are arranged in parallel in the vertical direction of the vehicle. Then, on the outer surface of each ridge portion 74, a fiber reinforced resin portion 76 having a substantially arcuate cross section and extending in the vehicle width direction is adhesively fixed so as to extend along the outer surface of the ridge portion 74 and cover the outer surface. There is.

・上記実施形態にかかるバンパー部材およびその製造方法は、断面円弧状の突条部を有するバンパー部材に限らず、任意の断面形状の突条部を有するバンパー部材に適用可能である。図11に、そうしたバンパー部材80の一例を示す。図11に示すように、バンパー本体81の突出部83は、断面ハット形状で車幅方向に延びている。繊維強化樹脂部86は、断面コの字状で車幅方向に延びている。繊維強化樹脂部86は、突条部84の外面に沿って延びて同外面を覆う態様で、突条部84の外面に接着固定されている。 -The bumper member and the manufacturing method thereof according to the above embodiment are not limited to the bumper member having a ridge portion having an arcuate cross section, and can be applied to the bumper member having a ridge portion having an arbitrary cross-sectional shape. FIG. 11 shows an example of such a bumper member 80. As shown in FIG. 11, the protruding portion 83 of the bumper main body 81 has a hat shape in cross section and extends in the vehicle width direction. The fiber reinforced resin portion 86 has a U-shaped cross section and extends in the vehicle width direction. The fiber reinforced resin portion 86 extends along the outer surface of the ridge portion 84 and covers the outer surface thereof, and is adhesively fixed to the outer surface of the ridge portion 84.

・加熱装置50としては、固定型41の温度や可動型43の温度を各別に調整することができるのであれば、所定温度のオイルを供給するタイプの加熱装置50に限らず、任意のタイプの加熱装置を採用することができる。例えば、電熱ヒータの作動制御を通じて固定型41の温度や可動型43の温度を調整するタイプの加熱装置を設けるようにしてもよい。 The heating device 50 is not limited to the type of heating device 50 that supplies oil at a predetermined temperature, but can be of any type as long as the temperature of the fixed type 41 and the temperature of the movable type 43 can be adjusted separately. A heating device can be adopted. For example, a heating device of a type that adjusts the temperature of the fixed type 41 and the temperature of the movable type 43 through the operation control of the electric heater may be provided.

・金型装置40によって突出部23および繊維強化樹脂部26を一体成形する工程を、可動型43と固定型41とに温度差が付与されない状態で、言い換えれば、可動型43の温度と固定型41の温度とが略同一の状態で実行するようにしてもよい。その他、可動型43の温度を固定型41の温度よりも低くした状態で、上記工程を実行すること等も可能である。要は、完成したバンパー部材20を、繊維強化樹脂部26の内面によってバンパー本体21の突条部24の外面が締め付けられた状態にすることができればよい。 The step of integrally molding the protrusion 23 and the fiber reinforced resin portion 26 by the mold device 40 is performed in a state where no temperature difference is applied between the movable mold 43 and the fixed mold 41, in other words, the temperature of the movable mold 43 and the fixed mold. It may be executed in a state where the temperature of 41 is substantially the same. In addition, it is also possible to execute the above steps in a state where the temperature of the movable mold 43 is lower than the temperature of the fixed mold 41. In short, it suffices that the completed bumper member 20 can be brought into a state where the outer surface of the ridge portion 24 of the bumper main body 21 is tightened by the inner surface of the fiber reinforced resin portion 26.

・バンパー本体21および繊維強化樹脂部26の一体成形に用いる成形法としては、RTM(レジン・トランスファー・モールディング)成形法など、PCM成形法以外の成形法を用いることができる。 -As the molding method used for the integral molding of the bumper main body 21 and the fiber reinforced resin portion 26, a molding method other than the PCM molding method such as an RTM (resin transfer molding) molding method can be used.

・バンパー本体21を構成する第1材料や繊維強化樹脂部26を構成する第2材料は、第1材料の熱膨張率が第2材料の熱膨張率よりも大きいといった関係を満たすのであれば、任意に変更することができる。バンパー本体21を構成する第1材料としては、溶融亜鉛鍍金鋼板および冷間圧延鋼板以外の鉄板や、アルミニウム板などを用いることができる。被覆部材としての繊維強化樹脂部26を構成する第2材料としては、不連続炭素繊維またはガラス繊維によって強化した繊維強化樹脂材料や、母材が熱可塑性樹脂の繊維強化樹脂材料を用いることができる。また、強化用の繊維を含まない熱硬化性樹脂材料や、強化用の繊維を含まない熱可塑性樹脂材料等を、第2材料として用いることもできる。なお、第2材料として不連続炭素繊維によって強化した繊維強化樹脂材料を用いる場合には、バンパー本体および繊維強化樹脂部の一体成形に用いる成形法として、SMC(シート・モールディング・コンパウンド)成形法を採用することができる。 -If the first material constituting the bumper main body 21 and the second material constituting the fiber reinforced resin portion 26 satisfy the relationship that the coefficient of thermal expansion of the first material is larger than the coefficient of thermal expansion of the second material, It can be changed arbitrarily. As the first material constituting the bumper main body 21, an iron plate other than the hot-dip galvanized steel plate and the cold-rolled steel plate, an aluminum plate, or the like can be used. As the second material constituting the fiber-reinforced resin portion 26 as the covering member, a fiber-reinforced resin material reinforced with discontinuous carbon fiber or glass fiber, or a fiber-reinforced resin material whose base material is a thermoplastic resin can be used. .. Further, a thermosetting resin material that does not contain reinforcing fibers, a thermoplastic resin material that does not contain reinforcing fibers, or the like can also be used as the second material. When a fiber-reinforced resin material reinforced with discontinuous carbon fiber is used as the second material, an SMC (sheet molding compound) molding method is used as a molding method used for integral molding of the bumper body and the fiber-reinforced resin portion. Can be adopted.

・上記実施形態にかかるバンパー部材およびその製造方法は、熱可塑性樹脂材料MAによって構成されたバンパー本体と、同材料MAよりも熱膨張率の大きい熱可塑性樹脂材料MBによって構成された被覆部材とを備えるバンパー部材にも適用することができる。この場合には、バンパー部材の突条部の外面と被覆部材の内面とを溶着固定することができる。 A bumper member and a method for manufacturing the bumper member according to the above embodiment include a bumper main body made of a thermoplastic resin material MA and a covering member made of a thermoplastic resin material MB having a larger coefficient of thermal expansion than the material MA. It can also be applied to the bumper member provided. In this case, the outer surface of the ridge portion of the bumper member and the inner surface of the covering member can be welded and fixed.

なお、上記バンパー部材においてバンパー本体に被覆部材を溶着固定する作業は、次のように実行することが好ましい。先ず、プレス成形や射出成形によってバンパー本体および被覆部材を各別に成形する。そして、バンパー部材の突条部の外面と被覆部材の内面とを、加熱して溶融した状態で重ね合わせて加圧する。これにより、バンパー部材の突条部の外面と被覆部材の内面とが熱溶着される。このようにしてバンパー本体に被覆部材を溶着固定することにより、被覆部材の内面において溶融した樹脂材料が固化する際に、バンパー部材の側の部分ほど、固化するタイミングが遅くなって収縮度合いが大きくなる。これにより、被覆部材の内面によってバンパー本体の突条部の外面が締め付けられる状態、言い換えれば、被覆部材の内面が突条部の外面に押し付けられた状態にすることができる。 It is preferable to perform the work of welding and fixing the covering member to the bumper body in the bumper member as follows. First, the bumper body and the covering member are separately molded by press molding or injection molding. Then, the outer surface of the ridge portion of the bumper member and the inner surface of the covering member are superposed and pressed in a molten state by heating. As a result, the outer surface of the ridge portion of the bumper member and the inner surface of the covering member are heat welded. By welding and fixing the covering member to the bumper body in this way, when the molten resin material is solidified on the inner surface of the covering member, the solidification timing is delayed and the degree of shrinkage is larger toward the portion on the bumper member side. Become. As a result, the outer surface of the ridge portion of the bumper body can be tightened by the inner surface of the covering member, that is, the inner surface of the covering member can be pressed against the outer surface of the ridge portion.

・上記実施形態にかかる接合体およびその製造方法は、車両のバンパー部材に限らず、ピラー部材等の車両の骨格部材にも適用することができる。その他、ベース部材の表面に異素材の被覆部材(例えば意匠パネル)が接合された構造の接合体などにも、上記実施形態にかかる接合体およびその製造方法は適用することができる。 -The joined body and the manufacturing method thereof according to the above embodiment can be applied not only to the bumper member of the vehicle but also to the skeleton member of the vehicle such as a pillar member. In addition, the joined body according to the above embodiment and the manufacturing method thereof can also be applied to a joined body having a structure in which a covering member made of a different material (for example, a design panel) is joined to the surface of the base member.

20,60,70,80…バンパー部材
21,81…バンパー本体
24,74,84…突条部
26,66,76,86…繊維強化樹脂部
27…内層部
28…外層部
29…接着層
30…熱プレス装置
40…金型装置
41…固定型
43…可動型
50…加熱装置
20, 60, 70, 80 ... Bumper member 21, 81 ... Bumper body 24, 74, 84 ... Protruding part 26, 66, 76, 86 ... Fiber reinforced resin part 27 ... Inner layer part 28 ... Outer layer part 29 ... Adhesive layer 30 … Heat press device 40… Mold device 41… Fixed mold 43… Movable mold 50… Heating device

Claims (6)

第1材料によって構成されて、突条をなす突条部を有するベース部材と、
前記第1材料よりも熱膨張率の大きい第2材料によって構成されて、前記突条部の外面に沿って延びて同外面を覆う形状をなして、前記突条部に接合された被覆部材と、
を備える接合体。
A base member composed of a first material and having a ridge portion forming a ridge,
A covering member which is composed of a second material having a larger coefficient of thermal expansion than the first material, extends along the outer surface of the ridge portion to cover the outer surface, and is joined to the ridge portion. ,
Joins with.
前記被覆部材は、連続繊維を含む繊維強化樹脂材料を前記第2材料とする2層構造の繊維強化樹脂部によって構成されており、
前記繊維強化樹脂部における前記突条部に近い側の内層部は、前記連続繊維の繊維方向と前記突条部の延設方向とが同一になっており、
前記繊維強化樹脂部における前記突条部から遠い側の外層部は、前記連続繊維の繊維方向と前記突条部の延設方向とが直交している
請求項1に記載の接合体。
The covering member is composed of a fiber-reinforced resin portion having a two-layer structure using a fiber-reinforced resin material containing continuous fibers as the second material.
In the inner layer portion of the fiber reinforced resin portion on the side close to the ridge portion, the fiber direction of the continuous fiber and the extending direction of the ridge portion are the same.
The bonded body according to claim 1, wherein the outer layer portion of the fiber reinforced resin portion on the side farther from the ridge portion is the joint body in which the fiber direction of the continuous fiber and the extension direction of the ridge portion are orthogonal to each other.
前記突条部は、少なくとも突端を含む先端部分の外面についての、前記突条部の延設方向と直交する方向における断面形状が円弧状をなしており、
前記被覆部材における前記先端部分の外面に沿って延びる部分の断面形状が円弧状をなしている
請求項1または2に記載の接合体。
The ridge portion has an arcuate cross-sectional shape in a direction orthogonal to the extending direction of the ridge portion, at least for the outer surface of the tip portion including the protrusion.
The joined body according to claim 1 or 2, wherein the cross-sectional shape of the portion of the covering member extending along the outer surface of the tip portion has an arc shape.
前記被覆部材は、前記突条部の外面における前記突条部の延設方向と直交する方向の全長にわたって延びている
請求項1〜3のいずれか一項に記載の接合体。
The joint according to any one of claims 1 to 3, wherein the covering member extends over the entire length of the outer surface of the ridge portion in a direction orthogonal to the extending direction of the ridge portion.
前記被覆部材は前記突条部に接着されている
請求項1〜4のいずれか一項に記載の接合体。
The bonded body according to any one of claims 1 to 4, wherein the covering member is adhered to the ridge portion.
請求項1〜5のいずれか一項に記載の接合体の製造に用いる製造方法であり、
前記第2材料として、熱硬化性樹脂を含む材料を用い、
第1型および第2型を有する金型装置を用いて、前記第1型と前記第2型との間における同第1型側のスペースに前記ベース部材が位置するとともに前記第2型側のスペースに前記被覆部材が位置する態様で、前記接合体を成形し、
前記金型装置による前記接合体の成形を、前記第2型の温度を前記第1型の温度よりも高くした状態で実行する
接合体の製造方法。
The manufacturing method used for manufacturing the bonded body according to any one of claims 1 to 5.
As the second material, a material containing a thermosetting resin is used.
Using the mold device having the first mold and the second mold, the base member is located in the space on the first mold side between the first mold and the second mold, and the base member is located on the second mold side. The bonded body is molded so that the covering member is located in the space.
A method for manufacturing a bonded body, in which the molding of the bonded body by the mold device is performed in a state where the temperature of the second mold is higher than the temperature of the first mold.
JP2020092516A 2020-05-27 2020-05-27 Bonded body and method for producing the same Pending JP2021187015A (en)

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