JP4052527B2 - Automotive fender liner and manufacturing method thereof - Google Patents

Automotive fender liner and manufacturing method thereof Download PDF

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Publication number
JP4052527B2
JP4052527B2 JP26102497A JP26102497A JP4052527B2 JP 4052527 B2 JP4052527 B2 JP 4052527B2 JP 26102497 A JP26102497 A JP 26102497A JP 26102497 A JP26102497 A JP 26102497A JP 4052527 B2 JP4052527 B2 JP 4052527B2
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JP
Japan
Prior art keywords
fender liner
arch
fender
liner
boundary edge
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Fee Related
Application number
JP26102497A
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Japanese (ja)
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JPH1178990A (en
Inventor
幸治 竹下
達也 谷川
誠 磯部
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Hayashi Engineering Inc
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Hayashi Engineering Inc
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Filing date
Publication date
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Priority to JP26102497A priority Critical patent/JP4052527B2/en
Publication of JPH1178990A publication Critical patent/JPH1178990A/en
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Publication of JP4052527B2 publication Critical patent/JP4052527B2/en
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Description

【0001】
【発明の属する技術分野】
この発明は自動車のフェンダー部に取着するフェンダーライナーおよびその製造方法に関する。
【0002】
【従来の技術】
自動車のホイールの上面をおおうフェンダー部ボディはホイールを受け入れるアーチ状に形成されてある。フェンダー部ボディのアーチ内面には樹脂製のフェンダーライナーを取り付け、自動車の走行時にホイールが跳ね上げる泥水や小石からボディを保護している。
フェンダーライナーは、ポリエチレン樹脂等の熱可塑性樹脂に各種の充填材を混入した組成物を、厚さ数ミリのシートに形成し、真空成形、圧空成形、スタンプ成形等をおこなって、取付位置のフェンダーアーチに沿う形状となしている。フェンダーライナーはフェンダー部ボディに、また隣接する他のボディ部材(バンパーフェイシア等)にネジ止めにより(また金属、樹脂のクリップも用い)取着される。
真空成形等によってフェンダーライナーのような絞りの深い成形品の成形をおこなった場合、成形前の樹脂シートの板厚が均一であっても成形後には、深い絞りを受ける部位の板厚は他の部位より板厚が薄くなる傾向がある。板厚が薄くなった部位は剛性が低下するので、自動車の走行時の空気抵抗によってばたつき、異音等を発生することも懸念される。
【0003】
【発明が解決しようとする課題】
従来、この部位のフェンダーライナーに排気孔をあけて空気抵抗を低減することもおこなわれているが、効果が十分でない場合も多い。また、フェンダーライナーの成形後の剛性を確保するために、成形前の樹脂シートの板厚を厚くすれば剛性は確保されるが、製品全体の重量が増加し、樹脂の使用量も過剰になり好適な対策とならない。本発明はこの課題を解決する。
【0004】
【課題を解決するための手段】
課題を解決する本発明の手段は、熱可塑性樹脂組成物のシートを成形してなり、自動車フェンダーのホイールアーチに沿う形状のアーチ形状部と、アーチ形状部から前方に折曲延設された延設部とからなるフェンダーライナーにおいて、目付量50〜500g/m の不織布を貼着することによって、前記アーチ形状部と延設部の境界縁近傍が一般部に比して厚肉化補強されていて、厚肉化の比率が一般部に対して120〜300%である自動車フェンダーライナーにより、またこのフェンダーライナーの製造方法として、フェンダーライナーの原料となる熱可塑性樹脂組成物を可塑状態にシート押し出しして形成した樹脂シートを、可塑状態にある間に真空および/または圧空成形、あるいはスタンプ成形すると同時に、アーチ形状部と延設部の境界縁近傍に目付量50〜500g/m の不織布を貼着一体化する自動車フェンダーライナーの製造方法による。
【0005】
発明者らは研究によって、この種のフェンダーライナー、特にフェンダーのホイールアーチに沿う形状のアーチ形状部とアーチ形状部から前方に折曲延設された延設部とからなるフェンダーライナーでは、車の走行時の空気抵抗によるばたつきを抑えるために、アーチ形状部と延設部の境界縁近傍を厚肉化補強することでフェンダーライナーの取着安定性を効果的に高めることを見出し、本発明にいたった。フェンダーライナーの曲げ剛性はおよそ、その厚さに比例する。
特に工程の合理化のためには、フェンダーライナーの成形と同時に境界縁近傍を厚肉化補強することが好ましく、このためには厚肉化補強を補強材の裏打ちによりおこなうのが好適である。
【0006】
【発明の実施の形態】
以下、図面をもとに本発明の好適の実施の形態を説明する。
図1は発明の対象とするフェンダーライナー10の外観図である。本発明の対象とするフェンダーライナーは原料の熱可塑性樹脂組成物をシート状に押し出し、フェンダーライナーを取着するフェンダーに沿うよう絞り成形してなるものであり、フェンダーのホイールアーチに沿う形状のアーチ形状部11とアーチ形状部から前方に折曲延設された延設部12とからなる。端縁には複数の取付座部14をもってなる。取付座部には取付ネジ挿通用の開孔15があけてある。開孔に取付ネジを通し相対するフェンダー部ボディに取着する。フェンダーライナーの原料樹脂の組成としては、高密度ポリエチレン樹脂、ABS樹脂、エラストマー等を母材とし、充填材としてタルク、ガラス繊維等を混入してなるものが好ましい。曲げ弾性率は10000kg/cm2 (ASTM−D790)以上あるのが適する。
フェンダーライナー10のアーチ形状部11と延設部12の境界縁13の近傍には補強材20が裏打ちされ厚肉化されている。補強材として好ましいのは、目付量が50〜500g/m2 のポリエステル、ナイロン、ポリプロピレン繊維のニードルパンチ不織布である。不織布は表面が毛羽立っているのが好ましく、可塑状態の樹脂シートに押圧した際に毛羽が樹脂シートに入り込み(接着剤を用いずに)貼着できる。そのほかに補強材として好ましいのは、フェンダーライナー原料熱可塑性樹脂組成物と相溶性の大きい樹脂のプレートなどである。厚肉化の比率は、一般部に対して120〜300%が有効である。
【0007】
図2は図1のフェンダーライナー10を自動車に取り付けた状態に示す断面図である。フェンダーライナーのアーチ形状部11はフェンダーのホイールアーチ50に取り付けられ、アーチ形状部11から境界縁13で折曲して延設部12が車両の前方に延設され、バンパーフェイシア30のリブ31に取付ネジ40によって取り付けられている。この取付状態において走行時の空気抵抗を最も大きく受けるのは、境界縁の近傍であり裏面が補強材20の裏打ちにより厚肉化されている。
【0008】
境界縁近傍の厚肉化補強はこのフェンダーライナーの原料シートの押し出し直後で可塑状態にあるうちにおこなうのが好ましい。フェンダーライナー原料の熱可塑性樹脂を主体とした組成物はスクリュー押出機内に投入され、加熱、混練を受け可塑状態におかれる。可塑状態になった樹脂組成物はアキュームレーターを経由してスクリュー押出機の先端に取り付けたTダイよりシート状に押し出される。この際Tダイのリップ幅は必要とするフェンダーライナーの一般部の厚さより若干薄くするのが好ましい。押し出された樹脂が冷えて固化する以前に、樹脂シートの成形後にフェンダーライナーのアーチ形状部と延設部の境界縁近傍となる位置に合わせて補強材を裏打ちする。
【0009】
【発明の効果】
本発明のフェンダーライナーは、全体の重量を増加させることなく、車両への取付安定性を高めることができる。また、このための補強厚肉化はフェンダーライナーの成形と同時であり、新たな工程追加の必要がない。
フェンダーライナーの振動の減衰性が良くなり、水や小石が当たった場合に発する騒音を低減することができる。
車両の振動に起因したネジの緩みを防止できる。
【図面の簡単な説明】
図1は、本発明の対象とする自動車用フェンダーライナーの外観図であり、図2は自動車に取り付けた状態の断面図を示す。
【符号の説明】
10・・・フェンダーライナー
11・・・アーチ形状部
12・・・延設部
13・・・境界縁
14・・・取付座部
15・・・開孔
16・・・排気孔
20・・・補強材
30・・・バンパーフェイシア
31・・・リブ
40・・・取付ネジ
50・・・フェンダー(ホイールアーチ)
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fender liner attached to a fender portion of an automobile and a method for manufacturing the same.
[0002]
[Prior art]
The fender body that covers the upper surface of the wheel of the automobile is formed in an arch shape for receiving the wheel. A fender liner made of resin is attached to the inner surface of the arch of the fender body to protect the body from muddy water and pebbles that the wheel springs up when the car is running.
The fender liner is a composition in which various fillers are mixed into a thermoplastic resin such as polyethylene resin, and is formed into a sheet with a thickness of several millimeters. The fender is then subjected to vacuum forming, pressure forming, stamp forming, etc. It has a shape along the arch. The fender liner is attached to the fender body and to other adjacent body members (such as bumper fascia) by screwing (also using metal or resin clips).
When molding a deeply drawn product such as a fender liner by vacuum forming or the like, even if the thickness of the resin sheet before molding is uniform, There is a tendency that the plate thickness becomes thinner than the part. Since the rigidity of the portion where the plate thickness is reduced is lowered, there is a concern that it may flutter due to the air resistance during driving of the automobile and generate abnormal noise.
[0003]
[Problems to be solved by the invention]
Conventionally, air resistance has been reduced by making an exhaust hole in the fender liner of this part, but the effect is often insufficient. In addition, to ensure the rigidity after molding of the fender liner, increasing the thickness of the resin sheet before molding will ensure rigidity, but the overall weight of the product will increase and the amount of resin used will be excessive. It is not a suitable measure. The present invention solves this problem.
[0004]
[Means for Solving the Problems]
The means of the present invention for solving the problems is formed by molding a sheet of a thermoplastic resin composition, and has an arch shape portion that is shaped along the wheel arch of an automobile fender, and an extension that is bent forward from the arch shape portion. In the fender liner composed of the installation part , by adhering a non-woven fabric with a basis weight of 50 to 500 g / m 2 , the vicinity of the boundary edge between the arch-shaped part and the extension part is thickened and reinforced compared to the general part. The thermoplastic resin composition used as a raw material for the fender liner is made into a plastic state by using an automobile fender liner having a thickening ratio of 120 to 300% with respect to the general part, and as a method for producing the fender liner. The extruded and formed resin sheet is vacuum and / or pressure molded or stamped while it is in the plastic state, and at the same time it is extended with the arched portion. According to the manufacturing method of an automobile fender liner in which a nonwoven fabric having a basis weight of 50 to 500 g / m 2 is attached and integrated in the vicinity of the boundary edge of the installation portion.
[0005]
The inventors have studied that this type of fender liner, in particular, a fender liner comprising an arch-shaped portion formed along the wheel arch of the fender and an extending portion bent forward from the arch-shaped portion, In order to suppress fluttering due to air resistance during traveling, it has been found that the attachment stability of the fender liner can be effectively increased by reinforcing the vicinity of the boundary edge between the arch-shaped portion and the extending portion by increasing the thickness. It was. The bending stiffness of a fender liner is approximately proportional to its thickness.
In particular, in order to rationalize the process, it is preferable to thicken and strengthen the vicinity of the boundary edge simultaneously with the molding of the fender liner. For this purpose, it is preferable to perform the thickening reinforcement by lining the reinforcing material.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an external view of a fender liner 10 as an object of the invention. The fender liner which is the subject of the present invention is formed by extruding a raw thermoplastic resin composition into a sheet shape and drawing it so as to follow the fender for attaching the fender liner. It consists of the shape part 11 and the extension part 12 bent and extended ahead from the arch shape part. The end edge has a plurality of mounting seats 14. An opening 15 for inserting a mounting screw is formed in the mounting seat. Attach it to the fender body that passes the mounting screw through the opening. As a composition of the raw material resin for the fender liner, a material obtained by mixing high density polyethylene resin, ABS resin, elastomer or the like as a base material and mixing talc, glass fiber or the like as a filler is preferable. The flexural modulus is suitably 10,000 kg / cm 2 (ASTM-D790) or more.
In the vicinity of the boundary edge 13 between the arch-shaped portion 11 and the extending portion 12 of the fender liner 10, a reinforcing material 20 is lined and thickened. Preferred as the reinforcing material is a needle punched nonwoven fabric of polyester, nylon or polypropylene fiber having a basis weight of 50 to 500 g / m 2 . The nonwoven fabric preferably has a fluffy surface, and when pressed against a plastic resin sheet, the fluff enters the resin sheet (without using an adhesive) and can be attached. In addition, a resin plate having high compatibility with the thermoplastic resin composition of the fender liner is preferable as the reinforcing material. The proportion of thickening is effectively 120 to 300% with respect to the general part.
[0007]
FIG. 2 is a cross-sectional view showing a state where the fender liner 10 of FIG. 1 is attached to an automobile. The arch-shaped portion 11 of the fender liner is attached to the wheel arch 50 of the fender, and the extended portion 12 extends from the arch-shaped portion 11 at the boundary edge 13 to the front of the vehicle. It is attached with a mounting screw 40. In this mounted state, the greatest air resistance during traveling is received in the vicinity of the boundary edge, and the back surface is thickened by the backing of the reinforcing material 20.
[0008]
Thickening reinforcement in the vicinity of the boundary edge is preferably performed immediately after the raw material sheet of the fender liner is extruded and in the plastic state. A composition mainly composed of a thermoplastic resin as a fender liner raw material is put into a screw extruder and is heated and kneaded to be in a plastic state. The resin composition in a plastic state is extruded into a sheet form from a T die attached to the tip of a screw extruder via an accumulator. At this time, the lip width of the T die is preferably slightly smaller than the required thickness of the general part of the fender liner. Before the extruded resin is cooled and solidified, the reinforcing material is lined up in accordance with the position in the vicinity of the boundary edge between the arch-shaped portion and the extending portion of the fender liner after the resin sheet is formed.
[0009]
【The invention's effect】
The fender liner of the present invention can improve the mounting stability to the vehicle without increasing the overall weight. Moreover, the reinforcement thickening for this is simultaneous with the shaping | molding of a fender liner, and it is not necessary to add a new process.
The vibration attenuation of the fender liner is improved, and the noise generated when hit with water or pebbles can be reduced.
Screw loosening due to vehicle vibration can be prevented.
[Brief description of the drawings]
FIG. 1 is an external view of an automobile fender liner that is an object of the present invention, and FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Fender liner 11 ... Arch-shaped part 12 ... Extension part 13 ... Boundary edge 14 ... Mounting seat part 15 ... Opening hole 16 ... Exhaust hole 20 ... Reinforcement Material 30 ... Bumper fascia 31 ... Rib 40 ... Mounting screw 50 ... Fender (wheel arch)

Claims (2)

熱可塑性樹脂組成物のシートを成形してなり、自動車フェンダーのホイールアーチに沿う形状のアーチ形状部と、アーチ形状部から前方に折曲延設された延設部とからなるフェンダーライナーにおいて、目付量50〜500g/m の不織布を貼着することによって、前記アーチ形状部と延設部の境界縁近傍が一般部に比して厚肉化補強されていて、厚肉化の比率が一般部に対して120〜300%であることを特徴とする自動車フェンダーライナー。Be by molding a sheet of thermoplastic resin composition, and the arcuate portion of the shape along the wheel arch of a motor vehicle fender, the fender liner comprising a extending portion which is bent extends forward from the arch-shaped portion, basis weight By adhering a 50 to 500 g / m 2 non-woven fabric, the vicinity of the boundary edge between the arch-shaped part and the extending part is reinforced thicker than the general part, and the ratio of the thickening is general. An automobile fender liner characterized by being 120 to 300% relative to the part . 請求項1に記載の自動車フェンダーライナーの製造方法であって、フェンダーライナーの原料となる熱可塑性樹脂組成物を可塑状態にシート押し出しして形成した樹脂シートを、可塑状態にある間に真空および/または圧空成形、あるいはスタンプ成形すると同時に、アーチ形状部と延設部の境界縁近傍に目付量50〜500g/m の不織布を貼着一体化することを特徴とする自動車フェンダーライナーの製造方法。The method for producing an automobile fender liner according to claim 1, wherein a resin sheet formed by extruding a thermoplastic resin composition as a raw material of the fender liner into a plastic state is subjected to vacuum and / or while the plastic sheet is in a plastic state. Alternatively, a method for producing an automobile fender liner, characterized in that a nonwoven fabric having a basis weight of 50 to 500 g / m 2 is bonded and integrated near the boundary edge between the arch-shaped portion and the extending portion at the same time as pressure forming or stamp forming.
JP26102497A 1997-09-10 1997-09-10 Automotive fender liner and manufacturing method thereof Expired - Fee Related JP4052527B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP26102497A JP4052527B2 (en) 1997-09-10 1997-09-10 Automotive fender liner and manufacturing method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP26102497A JP4052527B2 (en) 1997-09-10 1997-09-10 Automotive fender liner and manufacturing method thereof

Publications (2)

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JPH1178990A JPH1178990A (en) 1999-03-23
JP4052527B2 true JP4052527B2 (en) 2008-02-27

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4331080B2 (en) 2004-09-24 2009-09-16 株式会社ケーヒン Vehicle collision determination device
JP5666143B2 (en) * 2010-01-12 2015-02-12 トヨタ紡織株式会社 Automotive exterior materials

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