JPH0275249U - - Google Patents
Info
- Publication number
- JPH0275249U JPH0275249U JP15251788U JP15251788U JPH0275249U JP H0275249 U JPH0275249 U JP H0275249U JP 15251788 U JP15251788 U JP 15251788U JP 15251788 U JP15251788 U JP 15251788U JP H0275249 U JPH0275249 U JP H0275249U
- Authority
- JP
- Japan
- Prior art keywords
- density
- bumper
- foam
- core material
- density foam
- 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.)
- Granted
Links
- 239000011162 core material Substances 0.000 claims description 9
- 239000004619 high density foam Substances 0.000 claims description 9
- 239000004620 low density foam Substances 0.000 claims description 5
- 239000006260 foam Substances 0.000 claims 2
Description
第１図ａと第１図ｂは、本考案のバンパー芯材
の一例を示す斜視図である。第１図ｃは、第１図
ｂにおけるバンパー芯材の寸法を示すための部分
斜視図である。図において、Ａは高密度発泡体Ａ
を示し、Ｂは低密度発泡体Ｂを示す。第２図は、
バンパーの一例の平面図である。図において、Ａ
―Ａ′線は、実質受圧面を示す。第３図は、バン
パーの他の例の平面図である。図において、Ａ１
〜Ａ１′およびＡ２〜Ａ２′は実質受圧面を示す
。第４図は、バンパーにおける応力―歪み曲線の
例を示す。第５図は、バンパーにおける応力―歪
み曲線の好ましい例を示す。第６図ａ，ｂおよび
ｃは、衝突時にバンパーに負荷のかかる態様を示
す。第７図は、本考案の試験に使用したバンパー
芯材の横手方向（自動車の中心線の方向）の断面
図であり、Ａ１およびＡ２は高密度発泡体Ａの厚
みを示し、Ｂ１，Ｂ２およびＢ３は低密度発泡体
Ｂの厚みを示す。第８図は、実施例１における応
力―歪み曲線を示すものである。図において、曲
線ａは、本考案品の曲線を示し、曲線１は対照品
１の、曲線２は対照品２の、曲線３は対照品３の
曲線をそれぞれ示す。第９図ａは、高密度発泡体
の斜視図、第９図ｂと第９図ｃは、本考案のバン
パー芯材の一例を示す斜視図である。図において
、Ａは高密度発泡体Ａを示し、Ｂは低密度発泡体
Ｂを示す。第１０図は、本考案の試験に使用した
バンパー芯材の形状の一例を示す断面図である。
図において、Ａ１，Ａ２およびＡ３は、高密度発
泡体Ａの各部の厚みを示し、Ｂ１，Ｂ２およびＢ
３は低密度発泡体Ｂの各部の厚みを示す。第１１
図は、実施例５における応力―歪み曲線を示すも
のである。図において、各曲線に付した数字は、
それぞれ試料の番号を示す。
FIGS. 1a and 1b are perspective views showing an example of the bumper core material of the present invention. FIG. 1c is a partial perspective view showing the dimensions of the bumper core material in FIG. 1b. In the figure, A is high-density foam A
, and B indicates low density foam B. Figure 2 shows
It is a top view of an example of a bumper. In the figure, A
-A' line indicates the actual pressure receiving surface. FIG. 3 is a plan view of another example of the bumper. In the figure, A 1
˜A 1 ′ and A 2 ˜A 2 ′ indicate substantial pressure receiving surfaces. FIG. 4 shows an example of a stress-strain curve in a bumper. FIG. 5 shows a preferred example of a stress-strain curve in a bumper. Figures 6a, b and c show how the bumper is loaded during a collision. FIG. 7 is a cross-sectional view of the bumper core material used in the test of the present invention in the transverse direction (direction of the center line of the automobile), where A 1 and A 2 indicate the thickness of the high-density foam A, and B 1 , B 2 and B 3 indicate the thickness of the low density foam B. FIG. 8 shows the stress-strain curve in Example 1. In the figure, curve a shows the curve of the product of the present invention, curve 1 shows the curve of control product 1, curve 2 shows the curve of control product 2, and curve 3 shows the curve of control product 3. FIG. 9a is a perspective view of a high-density foam, and FIGS. 9b and 9c are perspective views showing an example of the bumper core material of the present invention. In the figure, A indicates high-density foam A, and B indicates low-density foam B. FIG. 10 is a cross-sectional view showing an example of the shape of the bumper core material used in the test of the present invention.
In the figure, A 1 , A 2 and A 3 indicate the thickness of each part of the high-density foam A, and B 1 , B 2 and B
3 indicates the thickness of each part of the low density foam B. 11th
The figure shows the stress-strain curve in Example 5. In the figure, the numbers attached to each curve are
Each sample number is indicated.
Claims (1)
度発泡体Ａおよび密度０．０１５〜０．０８ｇ／
cm3の低密度発泡体Ｂからなり、かつ発泡体Ａと
発泡体Ｂの密度差が０．０１ｇ／cm3以上である
、密度の異なる２種類のスチレングラフトポリエ
チレン共重合体の発泡体を組合わせてなる、自動
車バンパーの芯材であつて、高密度発泡体Ａが少
なくとも２カ所に分散し、バンパー芯材としてセ
ツトされた状態で、少なくとも１個が中心線より
上半分に、１個が下半分に位置するように設けら
れた構造の、自動車バンパーの芯材。 (2) 上と下に設けられた高密度発泡体Ａは相互
に連結されていることを特徴とする、実用新案登
録請求の範囲第１項に記載の自動車バンパーの芯
材。 (3) バンパー先端部における衝撃受圧面積にお
いて、高密度発泡体Ａの衝撃受圧面積の比率が１
０〜５０％である、実用新案登録請求の範囲第１
項記載の自動車バンパーの芯材。[Claims for Utility Model Registration] (1) High-density foam A with a density of 0.030 to 0.100 g/cm 3 and a density of 0.015 to 0.08 g/cm 3
cm 3 low-density foam B, and the difference in density between foam A and foam B is 0.01 g/cm 3 or more. The high-density foam A is dispersed in at least two places, and when set as a bumper core material, at least one piece is in the upper half of the center line and one piece is in the upper half of the center line. The core material of a car bumper is located in the lower half of the car. (2) The core material for an automobile bumper according to claim 1, wherein the high-density foam A provided at the top and bottom are interconnected. (3) The ratio of the impact pressure receiving area of high-density foam A to the impact pressure receiving area at the tip of the bumper is 1.
The first scope of claims for utility model registration, which is 0 to 50%.
Core material for automobile bumpers as described in section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988152517U JPH081146Y2 (en) | 1988-11-25 | 1988-11-25 | Automotive bumper core material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988152517U JPH081146Y2 (en) | 1988-11-25 | 1988-11-25 | Automotive bumper core material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0275249U true JPH0275249U (en) | 1990-06-08 |
| JPH081146Y2 JPH081146Y2 (en) | 1996-01-17 |
Family
ID=31427516
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988152517U Expired - Lifetime JPH081146Y2 (en) | 1988-11-25 | 1988-11-25 | Automotive bumper core material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH081146Y2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008120096A (en) * | 2008-01-11 | 2008-05-29 | Kaneka Corp | Inmold foam molding apparatus, method and inmold foam molded article |
| JP2010285142A (en) * | 2009-05-15 | 2010-12-24 | Denso Corp | Collision detection device for vehicle |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0211749U (en) * | 1988-07-08 | 1990-01-25 |
-
1988
- 1988-11-25 JP JP1988152517U patent/JPH081146Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0211749U (en) * | 1988-07-08 | 1990-01-25 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008120096A (en) * | 2008-01-11 | 2008-05-29 | Kaneka Corp | Inmold foam molding apparatus, method and inmold foam molded article |
| JP4539721B2 (en) * | 2008-01-11 | 2010-09-08 | 株式会社カネカ | In-mold foam molding apparatus and method, and in-mold foam molding product |
| JP2010285142A (en) * | 2009-05-15 | 2010-12-24 | Denso Corp | Collision detection device for vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH081146Y2 (en) | 1996-01-17 |