JPS6031940A - Manufacture of bumper made of synthetic resin - Google Patents
Manufacture of bumper made of synthetic resinInfo
- Publication number
- JPS6031940A JPS6031940A JP13896683A JP13896683A JPS6031940A JP S6031940 A JPS6031940 A JP S6031940A JP 13896683 A JP13896683 A JP 13896683A JP 13896683 A JP13896683 A JP 13896683A JP S6031940 A JPS6031940 A JP S6031940A
- Authority
- JP
- Japan
- Prior art keywords
- dies
- hollow structure
- bumper
- bumpers
- cutting
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/4273—Auxiliary operations after the blow-moulding operation not otherwise provided for
- B29C49/4278—Cutting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/72—Deflashing outside the mould
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、自動車で使用する合成樹脂製バンパーの製造
方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a synthetic resin bumper for use in automobiles.
最近の傾向として合成樹脂製バンパーは薄肉化して目付
を低減するもので、衝撃強度は主として裏側に位置する
鉄板でもたせ樹脂部には復元性のみを要求している。The recent trend is to make synthetic resin bumpers thinner to reduce their weight, and the impact strength is mainly achieved by a steel plate located on the back side, while the resin part is only required to have resilience.
一方、従来の合成樹脂製バンパーは射出成形によるもの
が大半であり、金型コストが高く少量多品種化に充分対
応できないという欠点がある。これに対し、ブロー成形
法を採用すれば金型は低コストとなるが、バンパー自体
はダブルウオール構造若しくは中空構造であり、日付け
の削減化という要求には反するものとなり、また射出成
形の場合よりもサイクルタイム面は劣りごく少数生産向
けのものでないと採算が合わない。さらに、ダブルウオ
ール構造ではバンパーコーナ部の折れ曲がり部分を一体
成形することがきわめて困難なものである。On the other hand, most conventional synthetic resin bumpers are made by injection molding, which has the drawback of high mold costs and the inability to sufficiently respond to a wide variety of products in small quantities. On the other hand, if the blow molding method is used, the cost of the mold will be low, but the bumper itself will have a double wall structure or a hollow structure, which goes against the requirement of reducing the date. The cycle time is inferior to that of the previous model, and it is not profitable unless it is for small-scale production. Furthermore, in the double wall structure, it is extremely difficult to integrally mold the bent portions of the bumper corners.
本発明の目的は前記従来例の不都合を解消し、ブロー成
形法で安価な金型を使用してコストの低減化を図り、し
かも製品として得られるバンパーはシングルウオールタ
イプで上述べの目付の低減化という要請とデザイン上の
多様性及び製作の容易性とを満足しさらに工程数も大巾
に削減でき安価に量産可能な合成樹脂製バンパーの製造
方法を提供することにある。The purpose of the present invention is to eliminate the disadvantages of the conventional example, to reduce costs by using an inexpensive mold in the blow molding method, and to reduce the above-mentioned area weight by using a single wall type bumper as a product. It is an object of the present invention to provide a method for manufacturing a synthetic resin bumper that satisfies the demands for improved design, diversity in design, and ease of manufacture, and can also greatly reduce the number of steps and can be mass-produced at low cost.
しかしてこの目的は本発明によれば、ブロー成形で製造
する場合において、金型で成形する中空構造体は得よう
とするバンパー2個を切断面を境に併合したものであり
、切断代を除去しながら該中空構造体を2分割して製品
を得ることにより達成される。However, according to the present invention, the purpose of the lever is that when manufacturing by blow molding, the hollow structure to be molded with a mold is one in which two bumpers to be obtained are merged with the cut surface as the boundary, and the cutting allowance is reduced. This is achieved by dividing the hollow structure into two parts while removing the product.
以下、図面について本発明の実施例を詳細に説明する。Embodiments of the present invention will be described in detail below with reference to the drawings.
まず、初めに、本発明方法により製造されるバンパーの
一例を先に説明する。First, an example of a bumper manufactured by the method of the present invention will be described first.
第1図〜第3図に示すようにバンパー1は合成樹脂のシ
ングルウオールタイプのものであり、左右端コーナ一部
1aは大きく後方に彎曲し、また下半分は後方に傾斜し
その先の延設部は逆に前方に突き出るよう彎曲してここ
にスポイラ−1bを一体的に形成した。さらに前記コー
ナ一部1aに円ボスタイプのボルト取付孔1cを形成し
、また正面左右にランプ取付用の凹部1dを、正面中央
部に横長孔からなる空気取込口1eを形成した。As shown in Figures 1 to 3, the bumper 1 is of a single wall type made of synthetic resin, and the left and right end corners 1a are largely curved backwards, and the lower half is tilted backwards, and the bumper 1 is of a single wall type made of synthetic resin. On the contrary, the installation part is curved so as to protrude forward, and the spoiler 1b is integrally formed here. Further, circular boss type bolt attachment holes 1c were formed in the corner portions 1a, recesses 1d for attaching lamps were formed on the left and right sides of the front, and an air intake port 1e consisting of a horizontally elongated hole was formed in the center of the front.
第3図中、2は前記バンパー1を被嵌するレインフォー
ス、3はこれからバンパー1及びインフォース2を自動
車の車体に取付けるためのステーである。バンパー1の
インフォース2への取付は方をさらに詳細に説明すると
、コーナ一部1aはボルト取付は孔1cを用いてボルト
止めし、第4図、第5図に示すように上面はリベット4
で止め、下部は空気取込口1eの開口縁とレインフォー
ス2の開口縁とを重ね合せ、嵌込式のナツト5をがませ
てボルトIトめを行う。このように図示の例では、レイ
ンフォース2の外面とバンパー1の内面とはほぼ同形で
両者は密接するものである。In FIG. 3, 2 is a reinforcement into which the bumper 1 is fitted, and 3 is a stay for attaching the bumper 1 and the reinforcement 2 to the vehicle body. To explain in more detail how to attach the bumper 1 to the force 2, the corner part 1a is bolted using the hole 1c, and the upper surface is fixed with a rivet 4 as shown in FIGS. 4 and 5.
At the bottom, overlap the opening edge of the air intake port 1e and the opening edge of the reinforcement 2, tighten the fit-in nut 5, and tighten the bolt I. In the illustrated example, the outer surface of the reinforcement 2 and the inner surface of the bumper 1 have substantially the same shape and are in close contact with each other.
バンパー1の形状は必ずしも前記のものに限定されるわ
けではないが、次にこのようなシングルウオールタイプ
のバンパー1を製造する本発明方法について説明する。Although the shape of the bumper 1 is not necessarily limited to the above-mentioned shape, the method of the present invention for manufacturing such a single wall type bumper 1 will be described next.
第6図は本発明方法の一実施例を示す断面図的説明図で
、ダイからパリソンを注出し、これの中に空気を吹き込
むと同時に金型成形法するブロー成形において、金型6
,6は第7図〜第9図に示すように得ようとするバンパ
ー1.11を切断面を境に併合し、切断代8を介在させ
て連結した中空構造体7を成形できるものとした。バン
パー1゜1“とけ完全に対称として併合する場合や多少
部分的に形状が異なる略対称である場合とが考えられ、
−例として前記切断代8は天井面と下端面に8a、8b
が、左右端に80があるものとする。FIG. 6 is a sectional view showing an embodiment of the method of the present invention. In blow molding, a parison is poured from a die and air is blown into the parison.
, 6 is such that a hollow structure 7 can be formed by merging the bumpers 1.11 to be obtained along the cut surfaces as shown in FIGS. 7 to 9 and connecting them with a cutting margin 8 interposed therebetween. . It is thought that the bumper 1°1" may be completely symmetrical and merged, or it may be approximately symmetrical with slightly different shapes,
- For example, the cutting allowance 8 is 8a, 8b on the ceiling surface and the lower end surface.
Assume that there are 80 at the left and right ends.
パリソンの材質即ち、中空構造体7の合成樹脂としては
、ブロー成形が可能な熱可塑樹脂、高密度ポリエチレン
、中低密度ポリエチレン、ポリプロピレン、プロピレン
−エチレンブロックもしくはランダム共重合体、または
高密度ポリエチレンとポリプロピレンとの混合物もしく
は高密度ポリエチレン、ポリプロピレンと無定形エチレ
ン−α−オレフィン共重合体、例えばエチレン−プロピ
レンゴム、エチレン−ブテン−1ゴム等との混合物等の
ポリオレフィン系樹脂、ポリ塩化ビニル。The material of the parison, that is, the synthetic resin of the hollow structure 7, may be a thermoplastic resin that can be blow molded, high-density polyethylene, medium-low density polyethylene, polypropylene, propylene-ethylene block or random copolymer, or high-density polyethylene. Polyolefin resins such as mixtures with polypropylene or high-density polyethylene, mixtures of polypropylene and amorphous ethylene-α-olefin copolymers such as ethylene-propylene rubber, ethylene-butene-1 rubber, etc., and polyvinyl chloride.
塩化ビニリデン等の塩化ビニル系樹脂、ポリスチレン、
アクリロニトリル−スチレン共重合体、アクリロニトリ
ル−ブタジェン−スチレン共重合体等のスチレン系樹脂
、ポリアミド系樹脂、ポリエステル系樹脂またはポリエ
ーテル系樹脂、例えばノリル(商品名)等があげられる
。Vinyl chloride resins such as vinylidene chloride, polystyrene,
Examples include styrene resins such as acrylonitrile-styrene copolymer and acrylonitrile-butadiene-styrene copolymer, polyamide resins, polyester resins, and polyether resins, such as Noryl (trade name).
一般的には約1.5m以上の長いパリソンが必要となる
ため、耐ドローダウン性にすぐれた材料が必要テ、分子
iff ノ大きイ1lrlPE (Mlo、 1以下)
、ポリプロピレン糸4Ai脂(MIo、1以下)及びオ
レフィン系エラスト゛7−1強化剤としてフィラー充填
した混合組成物などは最も適するものとなる。Generally, a long parison of about 1.5 m or more is required, so a material with excellent drawdown resistance is required.
, polypropylene thread 4Ai resin (MIo, 1 or less) and olefinic elastomer 7-1 filled with filler as a reinforcing agent are most suitable.
前記金型6.6により中空構造体7を得て、切断代8a
〜8cを適宜除去するとともに第9図切断線Aに示すよ
うにこれを2分割すれば、一度に2個の合成樹脂バンパ
ー1.11を得ることができる。なお、本実施例では金
型6,6のパーティングラインBは前記切断線Aに示す
切断面と一致させたが、第2実施例として第10図に示
すようにパーティングラインBはバンパー1又は1′の
前面に出すようにしてもよい。A hollow structure 7 is obtained using the mold 6.6, and the cutting allowance 8a is
By removing portions 8c and 8c as appropriate and dividing it into two parts as shown by cutting line A in FIG. 9, two synthetic resin bumpers 1.11 can be obtained at once. In addition, in this embodiment, the parting line B of the molds 6, 6 was made to coincide with the cutting surface indicated by the cutting line A, but as shown in FIG. Alternatively, it may be placed in front of 1'.
マタ、バンパー1,11の背面方向にリブ立てを行って
強度を増加することも考えられる。第11図はこのリブ
立てを行う場合の一例を示し、金型の他に油圧シリンダ
ロッド9により駆動され、該金型内を摺動しかつ先端が
内側に突出する可動ブレード10を設ける。It is also conceivable to increase the strength by forming ribs on the back side of the bumpers 1 and 11. FIG. 11 shows an example of the case in which this rib raising is performed. In addition to the mold, a movable blade 10 is provided which is driven by a hydraulic cylinder rod 9, slides within the mold, and whose tip protrudes inward.
このようにしてグイから注出されたパリソンを金型で挟
み内部に空気を送り込む際に、パリソンの固化が始まる
前にブレード10を突出させればパリソンも押され次い
でブレード10を後退させればこの部分が相互に融着し
、板状に形成されしかも本体部のバンパー1.11と一
体の補強リブ1h有する中空構造体7“を得ることがで
きる。When the parison poured from the goo is sandwiched between molds and air is sent into the interior, if the blade 10 is extended before the parison begins to solidify, the parison will also be pushed, and then the blade 10 can be moved back. These parts are fused together to obtain a hollow structure 7'' which is plate-shaped and has reinforcing ribs 1h integral with the bumper 1.11 of the main body.
第13図は他の方法でリブ立てを行った中空構造体7°
°の縦断面図で、金型に予め凹凸を形成し、辺の凹凸で
ボスタイプのリブ1gを形成するようにしてもよい。Figure 13 shows a 7° hollow structure with ribs made using another method.
As shown in the vertical cross-sectional view of °, it is also possible to form irregularities on the mold in advance, and form boss-type ribs 1g with the irregularities on the sides.
これらリブlh、Igを設けた場合、該リブはバンパー
の長手方向に並行して設けられることになり、ステーや
レインフォースに対し連続する梁の役目を発揮して強い
衝撃にも充分に対処できる強度を保つ。When these ribs Lh and Ig are provided, the ribs will be provided in parallel to the longitudinal direction of the bumper, and will function as a continuous beam for the stays and reinforcements, and can sufficiently cope with strong impacts. Stay strong.
以上述べたように本発明の合成樹脂バンパーの製造方法
は、金型コストの安いプロー成形法を採用し、しかも得
られる製品はシングルウオールタイプのもので日付低減
の効果も充分であり、また一度に2個を同時成形できる
ので工程数も少なく簡単かつ迅速にしかも安価に大量生
産可能なものである。As mentioned above, the method for manufacturing the synthetic resin bumper of the present invention adopts the blow molding method with low mold cost, and the resulting product is a single wall type, which has a sufficient effect of reducing the date. Since two pieces can be molded at the same time, the number of steps is small, and mass production is possible easily, quickly, and at low cost.
第1図は本発明方法で得たバンパーの使用状態を示す側
面図、第2図はバンパーの正面図、第3図は増付状態を
示す横断平面図、第4図は同上要部の正面図、第5図は
第4図のB−B線断面図、第6図は本発明方法の第1実
施例を示す断面図的説明図、第7図は第6図の方法によ
り成形された中空構造体の平面図、第8図は正面図、第
9図は第7図のA−A線断面図、第10図は本発明の第
2実施例を示す断面的説明図、第11図はリブ立てを行
う方法を示す縦断説明図、第12図はリブ立てを行った
中空構造体の縦断側面図、第13図は他の中空構造体の
例を示す縦断側面図である。
1.11・・・バンパー 1a・・・コーナ一部1b・
・・スポイラ−1c・・・ボルト取付孔1d・・・ラン
プ取付用の四部
1e・・・空気取込口 1h、Ig・・・リブ2・・・
レインフォース 3・・・ステー4・・・リベット 5
・・・ナツト
6・・・金型
7.7“、7”・・・中空構造体
8.8a〜8c・・・切断代
9・・・シリンダロッド 10・・・可動ブレード出願
人 東燃石油化学株式会社
手続補正書
特許庁長官 若 杉 和 夫 殿
1、事件の表示
昭和58年 特許側 第138966号2、発明の名称
合成樹脂製バンパーの製造方法
3、補正をする者
4、代理人
住 所 東京都豊島区目白−丁目7番14号自 発
明細書第6頁第2行目、rO,IJとあるを、rl、O
Jと訂正する。Fig. 1 is a side view showing how the bumper obtained by the method of the present invention is used, Fig. 2 is a front view of the bumper, Fig. 3 is a cross-sectional plan view showing the bumper as it is added, and Fig. 4 is a front view of the main parts of the same. Figure 5 is a sectional view taken along the line B-B in Figure 4, Figure 6 is a cross-sectional explanatory diagram showing the first embodiment of the method of the present invention, and Figure 7 is a molded product formed by the method shown in Figure 6. A plan view of the hollow structure, FIG. 8 is a front view, FIG. 9 is a cross-sectional view taken along line A-A in FIG. 7, FIG. 10 is a cross-sectional explanatory view showing a second embodiment of the present invention, and FIG. 12 is a vertical cross-sectional side view showing a method of rib-standing, FIG. 12 is a vertical side view of a hollow structure with ribs raised, and FIG. 13 is a vertical side view showing another example of a hollow structure. 1.11... Bumper 1a... Corner part 1b.
... Spoiler - 1c... Bolt mounting hole 1d... Four parts for lamp mounting 1e... Air intake port 1h, Ig... Rib 2...
Reinforce 3... Stay 4... Rivet 5
... Nut 6 ... Mold 7.7", 7" ... Hollow structure 8.8a to 8c ... Cutting allowance 9 ... Cylinder rod 10 ... Movable blade applicant Tonen Petrochemical Co., Ltd. Procedural Amendments Commissioner of the Patent Office Kazuo Wakasugi 1, Indication of the case 1981 Patent side No. 138966 2, Name of the invention Method for manufacturing synthetic resin bumpers 3, Person making the amendment 4, Address of the agent No. 7-14 Mejiro-chome, Toshima-ku, Tokyo Invention specification, page 6, line 2, rO, IJ, rl, O
Correct it with J.
Claims (1)
空構造体は得ようとするバンパー2個を切断面を境に併
合したものであり、切断代を除去しながら該中空構造体
を2分割して製品を得ることを特徴とする合成樹脂製バ
ンパーの製造方法。In the case of manufacturing by blow molding, the hollow structure to be molded with a mold is obtained by merging two bumpers to be obtained with the cut surface as the boundary, and the hollow structure is divided into two while removing the cutting allowance. A method for producing a synthetic resin bumper, characterized in that the product is obtained by
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13896683A JPS6031940A (en) | 1983-07-29 | 1983-07-29 | Manufacture of bumper made of synthetic resin |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13896683A JPS6031940A (en) | 1983-07-29 | 1983-07-29 | Manufacture of bumper made of synthetic resin |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6031940A true JPS6031940A (en) | 1985-02-18 |
JPH0415090B2 JPH0415090B2 (en) | 1992-03-16 |
Family
ID=15234337
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13896683A Granted JPS6031940A (en) | 1983-07-29 | 1983-07-29 | Manufacture of bumper made of synthetic resin |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6031940A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6726259B2 (en) * | 2000-03-20 | 2004-04-27 | Benteler Ag | Method of making a steel crossbeam which crossbeam forms a component of a bumper for motor vehicles, and crossbeam |
JP2015214067A (en) * | 2014-05-09 | 2015-12-03 | キョーラク株式会社 | Method of molding shock absorber |
JP2016056643A (en) * | 2014-09-11 | 2016-04-21 | 株式会社プラント・ツリース | Seismic isolation structure in building |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59166916U (en) * | 1983-04-22 | 1984-11-08 | 三菱自動車工業株式会社 | Blow molded products |
-
1983
- 1983-07-29 JP JP13896683A patent/JPS6031940A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59166916U (en) * | 1983-04-22 | 1984-11-08 | 三菱自動車工業株式会社 | Blow molded products |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6726259B2 (en) * | 2000-03-20 | 2004-04-27 | Benteler Ag | Method of making a steel crossbeam which crossbeam forms a component of a bumper for motor vehicles, and crossbeam |
JP2015214067A (en) * | 2014-05-09 | 2015-12-03 | キョーラク株式会社 | Method of molding shock absorber |
JP2016056643A (en) * | 2014-09-11 | 2016-04-21 | 株式会社プラント・ツリース | Seismic isolation structure in building |
Also Published As
Publication number | Publication date |
---|---|
JPH0415090B2 (en) | 1992-03-16 |
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