JPS62256636A - Preparation of core material for vehicular bumper and mold therefor - Google Patents
Preparation of core material for vehicular bumper and mold thereforInfo
- Publication number
- JPS62256636A JPS62256636A JP61101649A JP10164986A JPS62256636A JP S62256636 A JPS62256636 A JP S62256636A JP 61101649 A JP61101649 A JP 61101649A JP 10164986 A JP10164986 A JP 10164986A JP S62256636 A JPS62256636 A JP S62256636A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- core material
- feeder
- core
- molding
- 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.)
- Pending
Links
- 239000011162 core material Substances 0.000 title claims abstract description 38
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 7
- 239000000057 synthetic resin Substances 0.000 claims abstract description 7
- 238000000465 moulding Methods 0.000 claims abstract description 6
- 229920001169 thermoplastic Polymers 0.000 claims abstract description 5
- 239000004416 thermosoftening plastic Substances 0.000 claims abstract description 5
- 238000004519 manufacturing process Methods 0.000 claims description 13
- 238000001125 extrusion Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 6
- 239000000498 cooling water Substances 0.000 abstract description 8
- 239000002245 particle Substances 0.000 abstract description 4
- 239000011148 porous material Substances 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 abstract 1
- 238000010521 absorption reaction Methods 0.000 description 4
- 230000035939 shock Effects 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920005674 ethylene-propylene random copolymer Polymers 0.000 description 1
- 238000010097 foam moulding Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920005630 polypropylene random copolymer Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
「産業上の利用分野」
本発明は車輌バンパー用芯材の製造方法及び製造用金型
に関し、更に詳しくは衝突の際の吸収エネルギ一体積が
大きく、クラックが入り難り、且つ製造上も有利な車輌
バンパー用芯材の製造方法及び製造用金型に関するもの
である。Detailed Description of the Invention "Field of Industrial Application" The present invention relates to a method for manufacturing a core material for a vehicle bumper and a mold for manufacturing it. The present invention relates to a method for manufacturing a core material for a vehicle bumper, which is also advantageous in terms of manufacturing, and a mold for manufacturing it.
「従来技術と問題点」
近年、省エネルギーのための車輌の軽量化とともに、従
来の金属製バンパーに替えて合成樹脂発泡成形体からな
るバンパーが多用されている。この合成樹脂製バンパー
は、例えば第１図に図示する如く、芯材（１）と表皮Ｎ
（２）とから構成されている。（３）は車輌に取り付け
るためのビーム、（４）は押し出しピン孔及びフィーダ
一孔である。上記芯材（１）は−例を示せば第２図に示
した如き形状からなり、芯材（１）の前面、即ち表皮層
（２）と接する側に押し出しピン孔及びフィーダ一孔（
４）が配置されている。上記押し出しピン孔及びフィー
ダ一孔（４）は第１図に示した様に、芯材（１）の前面
に凹状のマークとして刻印され、従って衝突時の衝撃吸
収エネルギ一体積が小さくなり、それだけ衝撃吸収性能
を低下させるばかりでなく、いきおいクランクが入り易
くなる。又、一般に芯材（１）の前面は複雑な凹凸面と
なっており、押し出しピン孔、フィーダ一孔もこの複雑
な凹凸面に設けられるため、押し出しピン合わせが困難
で、押し出しピンの数も多数必要となり、作業能率を低
下させるという製造面でも種々の問題を孕んでいる。"Prior Art and Problems" In recent years, as vehicles have been made lighter in order to save energy, bumpers made of synthetic resin foam moldings have been increasingly used in place of conventional metal bumpers. This synthetic resin bumper has a core material (1) and an outer skin N, as shown in FIG. 1, for example.
It consists of (2). (3) is a beam for attachment to a vehicle, and (4) is an extrusion pin hole and a feeder hole. The core material (1) has a shape as shown in FIG. 2, for example, and has an extrusion pin hole and a feeder hole (
4) is located. As shown in Fig. 1, the ejector pin hole and feeder hole (4) are engraved as concave marks on the front surface of the core material (1), so that the volume of shock absorption energy in the event of a collision is reduced, and Not only does it reduce shock absorption performance, but it also makes it easier for the crank to engage. In addition, the front surface of the core material (1) generally has a complex uneven surface, and the ejector pin holes and feeder holes are also provided on this complex uneven surface, making it difficult to align the ejector pins and the number of ejector pins. A large number of them are required, which causes various problems in terms of manufacturing, such as lowering work efficiency.
「問題点を解決するための手段」
本発明者はかかる実情に鑑み、上記問題点を解消すべく
鋭意研究の結果、本発明に到達したものである。"Means for Solving the Problems" In view of the above circumstances, the present inventor has arrived at the present invention as a result of intensive research to solve the above problems.
即ち、本発明の第１は熱可塑性合成樹脂を金型内に充填
し、車輌バンパー用芯材を製造するに際し、該芯材のビ
ームに装着される側に押し出しピン及びフィーダーを位
置せしめて加熱成形することを特徴とする車輌バンパー
用芯材の製造方法を、本発明の第２はコア金型とキャビ
ティ金型とからなる車輌バンパー成形用金型において、
前記コア金型の背面に押し出しピン及びフィーダーを装
備させたことを特徴とする車輌バンパー用芯材製造用金
型をそれぞれ内容とするものである。That is, the first aspect of the present invention is to fill a mold with a thermoplastic synthetic resin and, when manufacturing a core material for a vehicle bumper, place an extrusion pin and a feeder on the side of the core material to be attached to the beam and heat it. A second aspect of the present invention relates to a method for manufacturing a core material for a vehicle bumper, which is characterized by molding, in a mold for molding a vehicle bumper comprising a core mold and a cavity mold.
Each of the above-mentioned core molds includes a mold for manufacturing a core material for a vehicle bumper, characterized in that the back surface of the core mold is equipped with an extrusion pin and a feeder.
以下、本発明の製造方法を実施するために用いられる金
型の実施態様を示す第３図に基づいて説明する。Hereinafter, a description will be given based on FIG. 3 showing an embodiment of a mold used for carrying out the manufacturing method of the present invention.
第３図において、金型はコア金型（固定型）（１１）と
キャビティ金型（移動型’）（１２）とから構成され、
前記コア金型（１１）に押し出しピン（１３）及びフィ
ーダー（１４）が取り付けられている。（１５）は冷却
水配管、（１６）は冷却水ノズル、（１７）はエジェク
ト梁、（１８）は車輌バンパー用芯材である。In FIG. 3, the mold consists of a core mold (fixed mold) (11) and a cavity mold (movable mold') (12),
An extrusion pin (13) and a feeder (14) are attached to the core mold (11). (15) is a cooling water pipe, (16) is a cooling water nozzle, (17) is an eject beam, and (18) is a core material for a vehicle bumper.
上記金型において、コア金型（１１）とキャビティ金型
（１２）とを型閉めて形成される型窩内にフィーダー（
１４）より熱可塑性合成樹脂発泡性粒子を充填し、金型
に設けられた蒸気細孔（図示せず）より蒸気を供給し、
前記発泡性粒子を加熱発泡させる０次いで、冷却水ノズ
ル（１６）より冷却水を供給して成形体（１８）を冷却
した後型開きし、エジェクト梁（１７）を前進させて押
し出しピンを前方に押し出し、成形体（１８）をコア金
型（１１）から離型させる。In the above mold, a feeder (
14) Filling the mold with expandable thermoplastic synthetic resin particles and supplying steam through steam pores (not shown) provided in the mold;
The expandable particles are heated and foamed. Next, cooling water is supplied from the cooling water nozzle (16) to cool the molded product (18), and then the mold is opened, and the eject beam (17) is advanced to move the ejecting pin forward. The molded body (18) is released from the core mold (11).
第４図は上記方法により得られた車輌バンパー用芯材を
示す斜視図で、芯材（１）の裏面フラット面に押し出し
ピン孔及びフィーダー（４）を配置した構成からなる。FIG. 4 is a perspective view showing a core material for a vehicle bumper obtained by the above-described method, and consists of an extrusion pin hole and a feeder (4) arranged on the flat back surface of the core material (1).
本発明に用いられる熱可塑性合成樹脂としては、ポリス
チレン系、ポリエチレン系、ポリプロピレン系、エチレ
ン−プロピレンランダム共重合体等公知の樹脂が全て好
適に用いられる。As the thermoplastic synthetic resin used in the present invention, all known resins such as polystyrene, polyethylene, polypropylene, and ethylene-propylene random copolymers are suitably used.
「作用・効果」
叙上の通り、本発明によれば、芯材の裏面フラット面に
押し出しピン、フィーダーを配置するのでピン合わせが
容易であり、押し出しピンの数も少なくて済み、作業性
が向上する。又、フラット面に押し出しピンを配置する
ため、離型も容易である。更に又、押し出しストローク
も短くなるため、装置を小型化することができる。又本
発明により得られる車輌バンパー用芯材は、押し出しピ
ン孔、フィーダ一孔をバンパー芯材の裏面、即ちビーム
側のフラット面に設けられるため、芯材表面に押し出し
ピン孔、フィーダ一孔を設けた従来品に比較して、前面
から衝撃を受けた際の衝撃吸収エネルギ一体積が大きく
、それだけ衝撃吸収性能が得られる。又、前面に押し出
しピン孔、フィーダ一孔がないため、それだけ前面の凹
凸面が少なく、クランクが入り難い。"Function/Effect" As described above, according to the present invention, since the push-out pins and feeder are arranged on the flat back surface of the core material, pin alignment is easy, the number of push-out pins is small, and workability is improved. improves. Furthermore, since the extrusion pins are arranged on a flat surface, it is easy to release the mold. Furthermore, since the extrusion stroke is shortened, the device can be downsized. In addition, in the vehicle bumper core material obtained by the present invention, the extrusion pin hole and the feeder hole are provided on the back surface of the bumper core material, that is, the flat surface on the beam side. Compared to conventional products, the impact absorption energy per volume is larger when an impact is received from the front, and the impact absorption performance can be improved accordingly. Also, since there is no push-out pin hole or feeder hole on the front surface, there are fewer uneven surfaces on the front surface, making it difficult to insert the crank.
等数多くの利点があり、その有用性は橿めて大である。It has many advantages such as, and its usefulness is extremely great.
第１図はバンパーの一例を示す断面図、第２図は従来の
バンパー用芯材を示す斜視図、第３図は本発明のバンパ
ー用芯材製造用金型の実施態様を示す断面図、第４図は
本発明方法及び装置により得られたバンパー用芯材を示
す斜視図である。
ｌ・・・芯材、 ２・・・表皮層３・・・ビーム
、 ４・・・押し出しピン孔又はフィーダ一孔
１１・・・コア金型、１２・・・キャビティ金型１３・
・・押し出しピン、１４・・・フィーダー１５・・・冷
却水管、１６・・・冷却水ノズル１７・・・エジェクト
梁、１８・・・成形体第１図
第 ２ ＋”Ａ
第３ 図FIG. 1 is a sectional view showing an example of a bumper, FIG. 2 is a perspective view showing a conventional bumper core material, and FIG. 3 is a sectional view showing an embodiment of a mold for producing a bumper core material of the present invention. FIG. 4 is a perspective view showing a core material for a bumper obtained by the method and apparatus of the present invention. l... Core material, 2... Skin layer 3... Beam, 4... Extrusion pin hole or feeder hole 11... Core mold, 12... Cavity mold 13.
...Eject pin, 14...Feeder 15...Cooling water pipe, 16...Cooling water nozzle 17...Eject beam, 18...Molded object Fig. 1 Fig. 2 +”A Fig. 3
Claims (1)
用芯材を製造するに際し、該芯材のビームに装着される
側に押し出しピン及びフィーダーを位置せしめて加熱成
形することを特徴とする車輌バンパー用芯材の製造方法
。 ２、コア金型とキャビティ金型とからなる車輌バンパー
成形用金型において、前記コア金型の背面に押し出しピ
ン及びフィーダーを装備させたことを特徴とする車輌バ
ンパー用芯材製造用金型。[Claims] 1. When manufacturing a core material for a vehicle bumper by filling a mold with a thermoplastic synthetic resin, an extrusion pin and a feeder are positioned on the side of the core material to be attached to the beam and heated. A method for manufacturing a core material for a vehicle bumper, which comprises molding. 2. A mold for manufacturing a core material for a vehicle bumper, which comprises a core mold and a cavity mold, and is characterized in that the back surface of the core mold is equipped with an extrusion pin and a feeder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61101649A JPS62256636A (en) | 1986-04-30 | 1986-04-30 | Preparation of core material for vehicular bumper and mold therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61101649A JPS62256636A (en) | 1986-04-30 | 1986-04-30 | Preparation of core material for vehicular bumper and mold therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62256636A true JPS62256636A (en) | 1987-11-09 |
Family
ID=14306225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61101649A Pending JPS62256636A (en) | 1986-04-30 | 1986-04-30 | Preparation of core material for vehicular bumper and mold therefor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62256636A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007515317A (en) * | 2003-12-23 | 2007-06-14 | デコマ インターナショナル インコーポレイテッド | Molded article, method and apparatus for molding foamed plastic material with steam box mold |
| JPWO2016136802A1 (en) * | 2015-02-27 | 2017-09-21 | 横浜ゴム株式会社 | Pneumatic tire |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5740136A (en) * | 1980-08-21 | 1982-03-05 | Mitsuboshi Belting Ltd | Shock energy absorbing bumper for vehicle |
| JPS60189660A (en) * | 1984-03-08 | 1985-09-27 | Japan Styrene Paper Co Ltd | Core material for automobile bumper |
| JPH08221745A (en) * | 1995-02-20 | 1996-08-30 | Hitachi Ltd | Production of thin-film magnetic recording medium |
-
1986
- 1986-04-30 JP JP61101649A patent/JPS62256636A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5740136A (en) * | 1980-08-21 | 1982-03-05 | Mitsuboshi Belting Ltd | Shock energy absorbing bumper for vehicle |
| JPS60189660A (en) * | 1984-03-08 | 1985-09-27 | Japan Styrene Paper Co Ltd | Core material for automobile bumper |
| JPH08221745A (en) * | 1995-02-20 | 1996-08-30 | Hitachi Ltd | Production of thin-film magnetic recording medium |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007515317A (en) * | 2003-12-23 | 2007-06-14 | デコマ インターナショナル インコーポレイテッド | Molded article, method and apparatus for molding foamed plastic material with steam box mold |
| JPWO2016136802A1 (en) * | 2015-02-27 | 2017-09-21 | 横浜ゴム株式会社 | Pneumatic tire |
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