JP5519103B2 - Cowl top cover - Google Patents
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- JP5519103B2 JP5519103B2 JP2007281519A JP2007281519A JP5519103B2 JP 5519103 B2 JP5519103 B2 JP 5519103B2 JP 2007281519 A JP2007281519 A JP 2007281519A JP 2007281519 A JP2007281519 A JP 2007281519A JP 5519103 B2 JP5519103 B2 JP 5519103B2
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- 239000011347 resin Substances 0.000 claims description 41
- 229920005989 resin Polymers 0.000 claims description 41
- 230000002093 peripheral effect Effects 0.000 claims description 35
- 238000001746 injection moulding Methods 0.000 claims description 10
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 230000007547 defect Effects 0.000 description 9
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 7
- 229910052709 silver Inorganic materials 0.000 description 7
- 239000004332 silver Substances 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
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Description
本発明は、外観品質を向上させた車両用カウルトップカバーに関する。 The present invention relates to a vehicular cowl top cover having improved appearance quality.
従来乗用車等の車両には、フロントフードにより覆われた区画が車体前部に設置されている。例えば、前側に動力用エンジンが搭載された車輌（フロントエンジンレイアウト車）には車体前部にエンジン室が設置されていて、このエンジン室は、左右側面がフェンダパネルにより、また上面開口部が開閉自在なフロントフード（ボンネット）により覆われた構造となっており、エンジン室の後部上方で前記フロントフードの後端の下方からフロントウィンドシールドガラスの下端部との間には、カウルトップカバーが設けられている。リアエンジン車（リアエンジンレイアウト車、リアミッドシップレイアウト車）においては、スペアタイヤやラゲッジスペースとして用いられる区画が、また電気自動車、燃料電池車などにおいても、駆動装置の設置場所や荷物室として利用可能な区画が、同様に、車体前部に設けられるものがあり、上記と同様にカウルトップカバーが設けられている構造を採用することがある（以下、前部区画を「エンジン室」という）。 Conventionally, in a vehicle such as a passenger car, a compartment covered with a front hood is installed at the front of the vehicle body. For example, a vehicle equipped with a power engine on the front side (front engine layout vehicle) has an engine compartment at the front of the vehicle body. The engine compartment has fender panels on the left and right sides, and the top opening opens and closes. It has a structure covered with a flexible front hood (bonnet), and a cowl top cover is provided above the rear of the engine compartment and below the front hood from the lower end of the front windshield glass. It has been. In rear-engine vehicles (rear-engine layout vehicles and rear-midship layout vehicles), sections used as spare tires and luggage spaces can be used as drive installation locations and luggage compartments in electric vehicles and fuel cell vehicles. Similarly, there is a case where a structure having a cowl top cover is provided in the same manner as described above (hereinafter, the front section is referred to as an “engine room”).
カウルトップカバーは、エンジン室の幅とほぼ同じ長さの長尺部材により形成されていて、全体が樹脂により射出成形されており、カウルトップカバーの一部には、例えば特許文献１に記載されているように、メッシュにより覆われた吸気口が開口されている。 The cowl top cover is formed of a long member having a length substantially the same as the width of the engine compartment, and is entirely injection-molded with resin. For example, Patent Document 1 describes a part of the cowl top cover. As shown, the air intake port covered with the mesh is opened.
カウルトップカバーの吸気口は、車両の走行時車室内へ外気を取り入れるもので、雨水や雪、枯葉等が吸気口内へ侵入するのを防止するため、吸気口にメッシュが設けられており、このメッシュはカウルトップカバーを樹脂により射出成形する際、カウルトップカバーと一体成形されている。 The cowl top cover air intake vents take outside air into the passenger compartment when the vehicle is running, and a mesh is provided at the air intake vent to prevent rainwater, snow, dead leaves, etc. from entering the air intake vent. The mesh is integrally formed with the cowl top cover when the cowl top cover is injection-molded with resin.
またカウルトップカバーは長尺なことから、金型を使用して射出成形する際、金型に形成された長尺なキャビティ内に均一に樹脂が射出されるように複数個所にゲートポイントを設けて、これらゲートポイントより同時にキャビティ内へ樹脂を射出している。 In addition, since the cowl top cover is long, when injection molding is performed using a mold, gate points are provided at multiple locations so that the resin is uniformly injected into the long cavity formed in the mold. The resin is injected into the cavity simultaneously from these gate points.
こうしたカウルトップカバーの成形において、前記吸気口である開口部の周縁部にウエルドラインが発生して、その外観を損なう問題がある。本出願人はこの問題を防止する技術についてすでに提案している（特許文献１）。これは開口部の外周部の板厚を薄肉として樹脂の流動抵抗を大きくすることでウエルドラインを開口部内に発生させて欠陥の目立つ領域にはウエルドラインの発生を防止するというものである。この技術により外観品質の向上について一定の成果を挙げることができたが、シルバーの抑制などなお一層の品質向上の要求がある。
本発明はかかる問題を改善するためになされたもので、射出成形時にウエルドラインやシルバー、フローマークなどの欠陥の発生部位を欠陥が存在しても外観上目立たない開口部のメッシュ部に確実に制御することによって、外観品質を更に一層向上させた車両用カウルトップカバーを提供することを目的とするものである。 The present invention has been made to remedy such a problem, and at the time of injection molding, defects such as weld lines, silver, and flow marks are surely formed in the mesh portion of the opening that is not noticeable even if there is a defect. An object of the present invention is to provide a vehicular cowl top cover that is further improved in appearance quality by being controlled.
本発明者は、カウルトップカバーの開口部周縁に現れるウエルドラインの形成部位をこの開口部のメッシュ部に確実に制御することについて鋭意検討した結果、メッシュ部の周縁部に現れる外観を損なう、シルバー、フローマークなどの欠陥は射出成形時にメッシュ部内に充填された溶融樹脂が更にその周縁部に向かう溶融樹脂の流出に起因しており、前記欠陥の発生をより確実に防止するにはこのメッシュ部からの溶融樹脂の流出を抑制することが重要であることを知見した。そして、更に検討を重ねた結果、メッシュ部内に溶融樹脂が満たされる前にメッシュ部の周縁部に溶融樹脂が素速く供給されるようにメッシュ部の周縁部の少なくとも一部に厚肉部を設けることが有効であることを見出し本発明に至った。
すなわち、本発明は、
［１］格子により形成されたメッシュ部が全面に設けられた吸気口である開口部を有するカウルトップカバー本体を、樹脂により射出成形した車両用カウルトップカバーであって、前記樹脂により射出成形する際に、前記開口部の端部近傍の前記メッシュ部と対向しない位置に設定されるゲートから注入された溶融樹脂が該メッシュ部のすべてを満たす前に、溶融樹脂が該メッシュ部の周縁部を囲むように
前記開口部周縁部の少なくとも一部に一般部よりも厚肉に形成した厚肉部とともに一般部よりも薄肉に形成した薄肉部を有する車両用カウルトップカバーであって、
前記厚肉部を少なくともその一部が開口縁部に設けた薄肉部を介して開口部の周縁部に設けたことを特徴とする車両用カウルトップカバー。
［２］前記厚肉部を開口周縁部の全周に設けた薄肉部を介してその全周に設けたことを特徴とする[１]に記載の車両用カウルトップカバー。
［３］補強用リブを前記開口部を挟んで薄肉部に設けた［１］または［２］のいずれかに記載の車両用カウルトップカバー。
に関する。
As a result of earnestly examining the formation of the weld line that appears on the periphery of the opening of the cowl top cover in the mesh part of the opening, the present inventor has intensively studied, and as a result, silver that impairs the appearance that appears on the periphery of the mesh part. In addition, defects such as flow marks are caused by the outflow of the molten resin filled in the mesh portion during injection molding toward the peripheral portion, and this mesh portion can be more reliably prevented from occurring. It was found that it is important to suppress the outflow of molten resin from As a result of further studies, a thick portion is provided on at least a part of the peripheral portion of the mesh portion so that the molten resin is quickly supplied to the peripheral portion of the mesh portion before the molten resin is filled in the mesh portion. Was found to be effective, leading to the present invention.
That is, the present invention
[1] A vehicular cowl top cover in which a cowl top cover main body having an opening serving as an air inlet having a mesh portion formed by a lattice is provided on the entire surface, is injection-molded with the resin. In this case, before the molten resin injected from the gate set at a position not facing the mesh portion in the vicinity of the end of the opening fills all of the mesh portion, the molten resin removes the peripheral portion of the mesh portion. A vehicular cowl top cover having a thin part formed thinner than a general part together with a thick part formed thicker than a general part on at least a part of the peripheral edge of the opening,
A vehicular cowl top cover, wherein the thick portion is provided at a peripheral portion of the opening portion through a thin portion at least part of which is provided at an opening edge portion .
[2] The vehicular cowl top cover according to [1], wherein the thick wall portion is provided on the entire circumference of the thin wall portion provided on the entire circumference of the peripheral edge portion of the opening.
[3] The vehicular cowl top cover according to any one of [1] or [2], wherein the reinforcing rib is provided in a thin portion with the opening interposed therebetween.
About.
本発明によれば、カウルトップカバーの射出成形時に、メッシュ部に溶融樹脂が満たされる前に、メッシュ部を溶融樹脂により取り囲むようにカウルトップカバーの開口部の周縁部にすばやく溶融樹脂を供給することができるように厚肉部を配設することにより、周縁部からメッシュ部に溶融樹脂を流入させかつメッシュ部からは溶融樹脂が実質的に流出しないので、ガスをメッシュ部内部に閉じ込めることができ、ウエルドライン、シルバー（シルバーストリーク、銀条）、フローマークなどの欠陥発生をメッシュ部内に止めることができる。したがって、それらの欠陥をメッシュ部外部の周縁部に発生することを実質的に防止することができ、外観品質を確実に向上することができる。メッシュ部内でこうした欠陥が発生しても外観上目立つことがなく、実質的にカウルトップカバー外観を損なうことはない。
又、特に薄肉部を厚肉部と共にメッシュ部周縁部に配設した場合には、外観の向上と共に、車両が走行中に歩行者などに衝突した場合のボンネットへの二次的な衝撃を破断しやすい前記薄肉部の存在により衝撃を吸収して緩和することができる。
According to the present invention, at the time of injection molding of the cowl top cover, before the mesh portion is filled with the molten resin, the molten resin is quickly supplied to the peripheral portion of the opening of the cowl top cover so as to surround the mesh portion with the molten resin. By disposing the thick portion so that the molten resin can flow into the mesh portion from the peripheral portion and the molten resin does not substantially flow out of the mesh portion, the gas can be trapped inside the mesh portion. In addition, defects such as weld lines, silver (silver streaks, silver stripes), and flow marks can be stopped in the mesh portion. Therefore, these defects can be substantially prevented from occurring in the peripheral edge outside the mesh portion, and the appearance quality can be reliably improved. Even if such a defect occurs in the mesh portion, it does not stand out in appearance and does not substantially impair the appearance of the cowl top cover.
In particular, when the thin wall portion and the thick wall portion are arranged on the periphery of the mesh portion, the external impact is improved and the secondary impact on the bonnet when the vehicle collides with a pedestrian or the like while traveling is broken. The presence of the thin-walled portion that is easy to do can absorb and relieve the impact.
本発明は、カウルトップカバーの射出成形の際に、溶融樹脂が開口部のメッシュ部を満たす前に素速く開口周縁部の全域に溶融樹脂を供給して周縁部よりメッシュ部に溶融樹脂を充填すること、かつメッシュ部からその周縁部への溶融樹脂の流出を抑制することが重要である。そのことによりカウルトップカバーの開口部周縁部に外観を損なうシルバー、フローマークが発生することを防止するものである。こうした場合においてはメッシュ部には欠陥が発生することとなるが、このメッシュ部の欠陥は外観上目立つことはないので、カウルトップカバーの外観を実質的に向上することができる。
このように、本発明のカウルトップカバーは、その外観品質を向上するために、射出成形の際に開口部のメッシュ部から溶融樹脂がその周縁に流出するのを抑制することが重要であるが、そのため本発明のカウルトップカバーには、開口部の周縁部の少なくとも一部にカウルトップカバーの平坦な領域など一般的な領域の厚みよりも肉厚とした肉厚部を設けることが重要である。さらに、この肉厚部とともに一般部よりも薄肉に形成した薄肉部を設けてこれらを組み合わせることも好ましい。この開口部の周縁部に設ける厚肉部、薄肉部の態様を示す実施例を図面により説明する。
In the present invention, during the injection molding of the cowl top cover, before the molten resin fills the mesh portion of the opening portion, the molten resin is quickly supplied to the entire periphery of the opening portion, and the mesh portion is filled with the molten resin from the peripheral portion. It is important to suppress the outflow of the molten resin from the mesh portion to the peripheral portion. This prevents the occurrence of silver and flow marks that impair the appearance of the peripheral edge of the opening of the cowl top cover. In such a case, a defect occurs in the mesh portion. However, since the defect in the mesh portion does not stand out in appearance, the appearance of the cowl top cover can be substantially improved.
As described above, in order to improve the appearance quality of the cowl top cover of the present invention, it is important to suppress the molten resin from flowing out from the mesh portion of the opening to the peripheral edge during the injection molding. Therefore, in the cowl top cover of the present invention, it is important to provide a thick part thicker than the thickness of a general region such as a flat region of the cowl top cover on at least a part of the peripheral part of the opening. is there. Furthermore, it is also preferable to provide a thin part formed thinner than the general part together with the thick part and combine them. An embodiment showing an embodiment of a thick part and a thin part provided at the peripheral edge of the opening will be described with reference to the drawings.
図１は、カウルトップカバーの斜視図である。
図２は、その裏面図である。この実施例は、ゲートより二つの開口部の間とゲートからより遠い開口部の周縁部位に溶融樹脂の流動抵抗の小さい厚肉部を形成し、ゲートからより近い開口部の周縁部位と、メッシュ部外周部の格子と、および前記開口部間の厚肉部と開口縁部との間には溶融樹脂の流動抵抗の大きい薄肉部位を配設して、前記のメッシュ部に溶融樹脂が満たされる前に開口部の周縁部にいち早く溶融樹脂を供給して周縁部全周から溶融樹脂が供給されるように、またメッシュ部から溶融樹脂が流出するのを抑制した構成を示す実施 例である。
FIG. 1 is a perspective view of a cowl top cover.
FIG. 2 is a rear view thereof. In this embodiment, a thick portion having a small flow resistance of the molten resin is formed between the two openings from the gate and at the peripheral portion of the opening farther from the gate, the peripheral portion of the opening closer to the gate, and the mesh A thin portion having a large flow resistance of the molten resin is disposed between the lattice of the outer peripheral portion and between the thick wall portion and the opening edge portion between the opening portions, and the mesh portion is filled with the molten resin. It is an Example which shows the structure which suppressed molten resin flowing out from a mesh part so that molten resin might be supplied to the peripheral part of an opening part promptly, and a molten resin may be supplied from a peripheral part perimeter.
図３は、図１Ａ−Ａ線断面説明図であり、前記実施例の開口部の周縁に配設した厚肉部、薄肉部の断面を説明する図である。図３中、厚肉部の拡大説明図において仮想線とその上方の実線との間で示される板厚が一般部の基本板厚を表し、厚肉部の増加した板厚は仮想線とその下方の実線との間で示す部分である。また、薄肉部の拡大説明図において薄肉部は、仮想線とその上方の実線との間で示される板厚分だけ薄肉とされている。厚肉部は一般部の基本板厚の１ ．２ 〜１．３倍程度が好ましく、薄肉部は一般部の基本板厚の半分程度が好 ましい。 前記のように図３中、薄肉部はメッシュ部の外周部の格子と、ゲートからより近い開口周縁に配されている。また、開口周縁の薄肉部および薄肉 としたメッシュ部外周格子には補強リブが設けられている。
図４は、本発明のカウルトップカバーを射出成形により成形する際の溶融樹 脂の流れを説明する図である。射出成形の際にゲート部から金型キャビティ内に注入された溶融樹脂はカウルトップカバー開口部周縁部に対応する金型キャビティの部位の少なくとも一部に厚肉部に対応する部位を配して、あるいは開口部の周縁部に対応する部位の少なくとも一部に厚肉部とともに薄肉部に対応する部位を配して、開口部メッシュ部の全周縁に対応する部位にいち早く溶融 樹脂を供給し、その周縁部からメッシュ部に対応する部位に溶融樹脂を供給して、メッシュ部対応部位からその外側の周縁部位に対応するキャビティ部位に溶融樹脂が流出しないように溶融樹脂を供給することを説明する模式図である 。
FIG. 3 is a cross-sectional explanatory view taken along the line AA in FIG. 1 and is a view for explaining a cross section of a thick portion and a thin portion disposed on the periphery of the opening portion of the embodiment. In FIG. 3, in the enlarged explanatory view of the thick part, the plate thickness shown between the virtual line and the solid line above it represents the basic plate thickness of the general part, and the increased thickness of the thick part is the virtual line and its It is a part shown between the lower continuous lines. Further, in the enlarged explanatory view of the thin portion, the thin portion is thinned by the plate thickness indicated between the virtual line and the solid line above it. The thick part is the basic thickness of the general part. It is preferably about 2 to 1.3 times, and the thin part is preferably about half the basic plate thickness of the general part. As described above, in FIG. 3, the thin-walled portion is arranged on the outer peripheral portion of the mesh portion and the opening periphery closer to the gate. Further, reinforcing ribs are provided on the thin peripheral portion of the opening and the thin mesh portion outer peripheral lattice.
FIG. 4 is a view for explaining the flow of molten resin when the cowl top cover of the present invention is molded by injection molding. The molten resin injected into the mold cavity from the gate during injection molding has a part corresponding to the thick part at least part of the part of the mold cavity corresponding to the periphery of the cowl top cover opening. Alternatively, by arranging a portion corresponding to the thin wall portion along with the thick wall portion in at least a part of the portion corresponding to the peripheral edge portion of the opening portion, the molten resin is quickly supplied to the portion corresponding to the entire peripheral edge portion of the opening mesh portion, Explaining that the molten resin is supplied from the peripheral portion to the portion corresponding to the mesh portion, and the molten resin is supplied from the mesh portion corresponding portion to the cavity portion corresponding to the outer peripheral portion so as not to flow out. It is a schematic diagram.
図５は、図３の断面を有する開口部を具備するカウルトップカバーが、車両 走行中に歩行者との衝突が起きて二次的にボンネットを介して衝撃を受けた時 、薄肉部から破損して歩行者に対して特にその頭部への衝撃を緩和する説明図である。
図６は、本発明の別の実施例を説明する図である。この実施例は、開口部周縁 部に開口縁部全周に配設した薄肉部を介してその全周に厚肉部を配設した構成を説明するものである。この実施例も前記実施例と同様に開口部の周縁部にいち早く溶融樹脂を供給し、そこからメッシュ部内に溶融樹脂を供給することができ、こうした構成でもメッシュ部からは溶融樹脂が流出することを抑制することができる。
図７は、図６中、Ｂ−Ｂ線断面説明図である。
FIG. 5 shows that a cowl top cover having an opening having a cross section shown in FIG. 3 is damaged from a thin portion when a collision with a pedestrian occurs while the vehicle is running and a secondary impact is received through a bonnet. And it is explanatory drawing which relieve | moderates the impact to the head especially with respect to a pedestrian.
FIG. 6 is a diagram for explaining another embodiment of the present invention. In this embodiment, a configuration is described in which a thick portion is provided on the entire periphery of the periphery of the opening portion through a thin portion provided on the entire periphery of the opening edge. In this embodiment as well, the molten resin can be quickly supplied to the peripheral edge of the opening, and then the molten resin can be supplied into the mesh portion. Even in such a configuration, the molten resin flows out from the mesh portion. Can be suppressed.
FIG. 7 is a cross-sectional explanatory view taken along the line BB in FIG.
Claims (3)
前記開口部周縁部の少なくとも一部に一般部よりも厚肉に形成した厚肉部とともに一般部よりも薄肉に形成した薄肉部を有する車両用カウルトップカバーであって、
前記厚肉部を少なくともその一部が開口縁部に設けた薄肉部を介して開口部の周縁部に設けたことを特徴とする車両用カウルトップカバー。 A cowl top cover body for a vehicle that is injection-molded with a resin, a cowl top cover body having an opening that is an air inlet provided with a mesh portion formed by a lattice, and when the injection molding with the resin, Before the molten resin injected from the gate set at a position not facing the mesh portion in the vicinity of the end of the opening fills all of the mesh portion, the molten resin surrounds the peripheral portion of the mesh portion,
A vehicular cowl top cover having a thin part formed thinner than a general part together with a thick part formed thicker than a general part in at least a part of the peripheral part of the opening,
A vehicular cowl top cover, wherein the thick portion is provided at a peripheral portion of the opening portion through a thin portion at least part of which is provided at an opening edge portion .
The vehicular cowl top cover according to claim 1, wherein a reinforcing rib is provided in a thin portion with the opening interposed therebetween.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007281519A JP5519103B2 (en) | 2007-10-30 | 2007-10-30 | Cowl top cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007281519A JP5519103B2 (en) | 2007-10-30 | 2007-10-30 | Cowl top cover |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2009107465A JP2009107465A (en) | 2009-05-21 |
| JP5519103B2 true JP5519103B2 (en) | 2014-06-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2007281519A Active JP5519103B2 (en) | 2007-10-30 | 2007-10-30 | Cowl top cover |
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| Country | Link |
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| JP (1) | JP5519103B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5242509B2 (en) * | 2009-06-30 | 2013-07-24 | 株式会社パイオラックス | Hole plug |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0737815U (en) * | 1993-12-27 | 1995-07-14 | 河西工業株式会社 | Injection molded products |
| JP4975313B2 (en) * | 2005-12-20 | 2012-07-11 | 日本プラスト株式会社 | Vehicle cowl top cover |
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2007
- 2007-10-30 JP JP2007281519A patent/JP5519103B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP2009107465A (en) | 2009-05-21 |
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