JP3474759B2 - Resin hose - Google Patents
Resin hoseInfo
- Publication number
- JP3474759B2 JP3474759B2 JP03378098A JP3378098A JP3474759B2 JP 3474759 B2 JP3474759 B2 JP 3474759B2 JP 03378098 A JP03378098 A JP 03378098A JP 3378098 A JP3378098 A JP 3378098A JP 3474759 B2 JP3474759 B2 JP 3474759B2
- Authority
- JP
- Japan
- Prior art keywords
- hose
- bellows portion
- molding
- air duct
- injection
- 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.)
- Ceased
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Rigid Pipes And Flexible Pipes (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、樹脂製ホース、例
えば自動車エンジンの吸気系ダクトとしてエアクリーナ
からエアをエンジンに送気するエアダクトとして用いら
れ、その長さ方向の一部に蛇腹部を設けて屈曲性を良好
にした樹脂製ホースに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used as an air duct for supplying air from an air cleaner to an engine as a resin hose, for example, an air intake system duct of an automobile engine, and a bellows portion is provided in a part of its length direction. The present invention relates to a resin hose having good flexibility.
【０００２】[0002]
【従来の技術】従来、前記の吸気系ダクトとして、可撓
性および中空形状を保持できる機械的強度を要求される
関係上、加硫ゴム材料よりなる射出成形品であるゴム製
ダクトホースが用いられている。2. Description of the Related Art Conventionally, a rubber duct hose, which is an injection molded product made of a vulcanized rubber material, has been used as the intake duct because of its required mechanical strength capable of maintaining its flexibility and hollow shape. Has been.
【０００３】しかしながら、ゴム製のホースは樹脂製ホ
ースに比べて重量が重く、自動車軽量化の要請を満足さ
せることができず、組立作業時などにおける取扱いが不
便であるほか、近年資源の有効活用が重要視される状況
の下、ゴム材料はリサイクルが不可能という問題があ
る。However, the rubber hose is heavier than the resin hose, cannot satisfy the demand for weight reduction of the automobile, is inconvenient to handle at the time of assembling work, and in recent years, effective utilization of resources has been achieved. However, there is a problem that rubber materials cannot be recycled.
【０００４】すなわち、ゴムの射出成形時に製品ととも
に生じるバリ、ランナー部分、スプルー部分は全く再利
用できず、さらに、使用後の製品も、産業廃棄物として
処理されるのみで再利用されていないのが実状である。That is, burrs, runners, and sprue parts produced along with products during rubber injection molding cannot be reused at all, and the products after use are only treated as industrial waste and not reused. Is the actual situation.
【０００５】他方、前記のエアダクトとして樹脂製ホー
スが使用されている例もあるが、これはブロー成形法に
より成形されたホースで、その内面寸法精度が劣り、他
物と嵌合接続を行ううえで気密性を確保しにくいため、
ブロー成形した後に、ホースの端部内面を研磨加工する
等の二次加工により内面寸法精度を向上させる必要があ
った。On the other hand, there is an example in which a resin hose is used as the above-mentioned air duct, but this is a hose formed by a blow molding method and its inner surface dimensional accuracy is poor, so that it is necessary to make a fitting connection with another object. Since it is difficult to secure airtightness with
After the blow molding, it was necessary to improve the inner surface dimensional accuracy by secondary processing such as polishing the inner surface of the end of the hose.
【０００６】[0006]
【発明が解決しようとする課題】本発明は、上記の問題
点に鑑み、従来の加硫ゴムに代わって、軽量でリサイク
ルが可能でかつ加硫ゴムに類似した可撓性や強度などの
特性を有するとともに、高い内面寸法精度を成形と同時
に達成できる樹脂製ホースを提供することを課題とす
る。SUMMARY OF THE INVENTION In view of the above problems, the present invention, in place of conventional vulcanized rubber, is lightweight, recyclable, and has characteristics similar to vulcanized rubber such as flexibility and strength. It is an object of the present invention to provide a resin hose that has the above-mentioned properties and can achieve high inner surface dimensional accuracy simultaneously with molding.
【０００７】[0007]
【課題を解決するための手段】本発明は、上記課題を解
決するため、下記のように構成したものである。In order to solve the above problems, the present invention has the following structure.
【０００８】（１）ホース外面を形成するキャビティ型
とホース内面を形成するコア型とで形成されるキャビテ
ィに硬度がＨＳ（ＪＩＳ Ａ）５０〜９５の熱可塑性エ
ラストマーを射出成形して一体に屈曲した形状に形成さ
れたホースであって、上記ホースは長さ方向の一部にア
ンダーカットとなる蛇腹部を有するとともに、蛇腹部以
外の外周面に補強リブを有しており、射出成形後上記蛇
腹部を拡径してコア型より引抜いて脱型するようにした
ことを特徴とする自動車のエアダクト。(1) A thermoplastic elastomer having a hardness of HS (JIS A) 50 to 95 is injection molded into a cavity formed by a cavity mold forming an outer surface of a hose and a core mold forming an inner surface of the hose and integrally bent. a the hose formed in the shape, together with the hose has a bellows portion which is a a <br/> Ndakatto a portion of the length direction, the bellows part than
An air duct for an automobile, characterized in that it has a reinforcing rib on the outer peripheral surface, and after the injection molding, the bellows part is expanded in diameter and pulled out from the core mold to be removed from the core mold.
【０００９】（２）硬度がＨＳ（ＪＩＳ Ａ）６０〜９
０の熱可塑性エラストマーを射出成形してなる前記
（１）に記載の自動車のエアダクト。(2) Hardness is H S (JIS A) 60-9
The automobile air duct according to (1) above, which is obtained by injection-molding a thermoplastic elastomer of No. 0 .
【００１０】（３）蛇腹部のピッチが６〜１６ｍｍに形
成され、山部内面におけるホース内径Ｄ１／谷部内面に
おけるホース内径Ｄ２が１．１〜１・５の範囲にある前
記（１）または（２）に記載の自動車のエアダクト。(3) The pitch of the bellows portion is formed to be 6 to 16 mm, and the inner diameter Dose of the hose inner surface D1 / the inner hose inner diameter D2 of the valley inner surface is in the range of 1.1 to 1.5. The automobile air duct according to (2).
【００１１】本発明においては、従来のゴムの射出成形
にあたり必要とした素練り工程、配合工程、混練工程お
よび加硫工程を省略でき、熱可塑性エラストマー材料を
射出成形により効率良く成形できる。そして、成形され
た樹脂製ホースは内面寸法精度が優れるとともに、加硫
ゴムに類似した可撓性と強度を備えながら軽量でしかも
リサイクルが可能である。In the present invention, the masticating step, the compounding step, the kneading step and the vulcanizing step, which are required in the conventional injection molding of rubber, can be omitted, and the thermoplastic elastomer material can be efficiently molded by injection molding. The molded resin hose has excellent inner surface dimensional accuracy, has flexibility and strength similar to vulcanized rubber, is lightweight, and is recyclable.
【００１２】また、本発明の樹脂製ホースはアンダーカ
ットとなる蛇腹部を有するが、射出成形後、蛇腹部を膨
らませて拡径することによりコア型から引抜いて脱型が
可能であり、通常のアンダーカット部を有する合成樹脂
の射出成形品の成形に用いられるスライドピンなどの複
雑な金型構造が全く不要である。The resin hose of the present invention has an undercut bellows part. However, after injection molding, the bellows part can be inflated to expand its diameter so that it can be withdrawn from the core mold and released from the mold. A complicated mold structure such as a slide pin used for molding a synthetic resin injection-molded product having an undercut portion is completely unnecessary.
【００１３】[0013]
【実施例】以下、本発明の実施例を図面に基づいて説明
する。Embodiments of the present invention will be described below with reference to the drawings.
【００１４】図１は、屈曲した形状に形成された樹脂製
ホース１の一部切り欠き図で、図示しない自動車のエン
ジン本体とエアクリーナとを連結するエアダクトとして
使用され、その両端部６，６をエンジン本体またはエア
クリーナに締付具により接続固定し、エアクリーナを通
して取り入れられた外気をエンジン本体に供給する吸気
通路の一部を構成するものである。FIG. 1 is a partially cutaway view of a resin-made hose 1 formed in a bent shape. It is used as an air duct for connecting an engine body of an automobile (not shown) to an air cleaner, and its both ends 6, 6 are connected. It is connected to and fixed to the engine body or the air cleaner with a fastener, and constitutes a part of an intake passage for supplying the outside air taken in through the air cleaner to the engine body.
【００１５】樹脂製ホース１は、熱可塑性エラストマー
（ＴＰＥ）を成形材料として射出成形して一体に形成さ
れたもので、その長さ方向中央部付近に大径の複数の山
部３，３と小径の複数の谷部４，４がホース軸芯方向に
沿って交互に形成されてなる蛇腹部２が形成されてい
る。なお、５，５はホース１の蛇腹部２以外の外周面に
軸芯方向および円周方向に沿って一体形成された補強リ
ブである。The resin hose 1 is integrally formed by injection molding a thermoplastic elastomer (TPE) as a molding material, and has a plurality of large ridges 3 and 3 in the vicinity of the central portion in the length direction. A bellows portion 2 is formed in which a plurality of small-diameter troughs 4 and 4 are alternately formed along the hose axis direction. Reference numerals 5 and 5 are reinforcing ribs integrally formed on the outer peripheral surface of the hose 1 other than the bellows portion 2 along the axial direction and the circumferential direction.
【００１６】図２は、樹脂製ホース１の成形過程の一部
を示すもので、ホース外面形状を形成する上下一対の半
割のキャビティ型１１，１１とホース内面形状を形成す
るコア型１２からなる射出成形型１０のキャビティにＴ
ＰＥを射出成形後、型開きし、コア型１２周囲に成形保
持されたホース１をコア型１２から無理抜きにより脱型
して製品ホースを得るものであるが、アンダーカットの
蛇腹部を図示しないエア注入具等により膨らませて径を
拡大させて無理抜きを行うようにしている。FIG. 2 shows a part of the molding process of the resin hose 1, which is composed of a pair of upper and lower half cavity molds 11 and 11 which form the outer surface of the hose and a core mold 12 which forms the inner surface of the hose. T in the cavity of the injection mold 10
After injection molding of PE, the mold is opened, and the hose 1 molded and held around the core mold 12 is released from the core mold 12 by forced removal to obtain a product hose, but an undercut bellows portion is not shown. It is designed to be inflated by inflating it with an air injection tool etc. to increase the diameter.
【００１７】本発明におけるホース成形樹脂材料として
は、ポリスチレン系ＴＰＥ，ポリオレフィン系ＴＰＥ，
ポリジエン系ＴＰＥ，ポリ塩化ビニル系ＴＰＥ，塩素化
ポリエチレン系ＴＰＥ，ポリウレタン系ＴＰＥ，ポリエ
ステル系ＴＰＥ，ポリアミド系ＴＰＥ，フッ素系ＴＰＥ
等のＴＰＥが用いられる。As the hose molding resin material in the present invention, polystyrene TPE, polyolefin TPE,
Polydiene TPE, polyvinyl chloride TPE, chlorinated polyethylene TPE, polyurethane TPE, polyester TPE, polyamide TPE, fluorine TPE
Etc. are used.
【００１８】本発明の樹脂製ホースは、上記のＴＰＥの
硬度ＨＳ（ＪＩＳ Ａ）が５０〜９５であるのが好まし
く、５０より小さいとホースとしての機械的強度が不十
分となり、９５より大きいと硬すぎてホースの無理抜き
脱型が困難になる。より好ましい硬度は６０〜９０程
度，特に好ましくは６５〜８５程度が適当であり、この
ような硬度となるように、上記ＴＰＥおよびＴＰＥに配
合混練する可塑剤、充填剤、着色剤等の副資材の種類、
量を選定する。The resin hose of the present invention preferably has a TPE hardness H S (JIS A) of 50 to 95. When it is less than 50, the mechanical strength of the hose becomes insufficient, and when it is more than 95. If it is too hard, it will be difficult to remove the hose by force. A more preferable hardness is about 60 to 90, particularly preferably about 65 to 85. TPE and auxiliary materials such as a plasticizer, a filler, and a colorant to be mixed and kneaded with TPE to have such hardness are suitable. Types of
Select the amount.
【００１９】図３は本実施例におけるホースの蛇腹部２
の形状を示す拡大図で、本実施例では、山部３，３間の
ピッチＰを１０ｍｍ，山部３内面におけるホース内径Ｄ
１を６１．５ｍｍ，谷部４内面におけるホース内径Ｄ２
を５５．０ｍｍにし、波高ｈを６．５ｍｍの寸法に形成
し、この蛇腹部２を一部に有するホースをコア型から引
き抜いたところ、なんら支障なく脱型できることが確認
できた。なお、ホースの肉厚ｄは０．５〜４．０ｍｍの
範囲に形成することが望ましい。FIG. 3 shows the bellows portion 2 of the hose in this embodiment.
In this embodiment, the pitch P between the ridges 3 and 3 is 10 mm, and the hose inner diameter D on the inner surface of the ridge 3 is D.
1 to 61.5 mm, inner diameter of hose D2 on inner surface of valley 4
Was set to 55.0 mm, the wave height h was set to 6.5 mm, and the hose partially having the bellows part 2 was pulled out from the core mold, and it was confirmed that the mold could be released without any trouble. The wall thickness d of the hose is preferably formed in the range of 0.5 to 4.0 mm.
【００２０】コア型から脱型可能な蛇腹部の形状とし
て、ピッチＰを６〜１６ｍｍ、Ｄ１／Ｄ２を１．１〜
１．５の範囲に設定するのが好ましい。As the shape of the bellows part which can be removed from the core mold, the pitch P is 6 to 16 mm and D1 / D2 is 1.1 to.
It is preferable to set it in the range of 1.5.
【００２１】[0021]
【発明の効果】以上説明したように、本発明によれば、
アンダーカットとなる蛇腹部を有するホースをＴＰＥを
成形材料として射出成形するので、軽量化とリサイクル
を同時に実現でき、かつ、内面の寸法精度も高いので、
自動車の吸気系ダクト等の用途に利用価値の大きいもの
である。As described above, according to the present invention,
Since a hose having an undercut bellows part is injection-molded using TPE as a molding material, weight reduction and recycling can be realized at the same time, and the inner surface has high dimensional accuracy.
It is of great utility in applications such as automobile air intake ducts.
【図１】本発明の樹脂製ホースの一部切欠き側面図であ
る。FIG. 1 is a partially cutaway side view of a resin hose of the present invention.
【図２】本発明の樹脂製ホースの成形過程を示す図であ
る。FIG. 2 is a diagram showing a molding process of the resin hose of the present invention.
【図３】図１のホースの蛇腹部の拡大図である。FIG. 3 is an enlarged view of a bellows portion of the hose of FIG.
１ 樹脂製ホース ２ 蛇腹部 ３ 山部 ４ 谷部 ５ 補強リブ ６，６ 両端部 １０ 射出成形型 １１，１１ キャビティ型 １２ コア型 1 resin hose 2 bellows 3 Yamabe 4 Tanibe 5 Reinforcing ribs 6,6 both ends 10 Injection mold 11,11 cavity type 12 core type
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｂ２９Ｌ 23:00 Ｂ２９Ｌ 23:00 (72)発明者 福田 国広 大阪府高槻市東上牧１丁目１番３号 タ イガースポリマー株式会社 大阪工場内 (56)参考文献 特開 平６−297492（ＪＰ，Ａ) 特開 平５−245889（ＪＰ，Ａ) 特開 昭61−262112（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) F16L 11/11 B29C 45/44 F02M 35/10 101 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 7 Identification code FI B29L 23:00 B29L 23:00 (72) Inventor Kunihiro Fukuda 1-3-1 Higashikamimaki, Takatsuki City, Osaka Prefecture Tigers Polymer Co., Ltd. Osaka factory (56) Reference JP-A-6-297492 (JP, A) JP-A-5-245889 (JP, A) JP-A-61-262112 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) F16L 11/11 B29C 45/44 F02M 35/10 101
Claims (3)
ース内面を形成するコア型とで形成されるキャビティに
硬度がＨＳ（ＪＩＳ Ａ）５０〜９５の熱可塑性エラス
トマーを射出成形して一体に屈曲した形状に形成された
ホースであって、上記ホースは長さ方向の一部にアンダ
ーカットとなる蛇腹部を有するとともに、蛇腹部以外の
外周面に補強リブを有しており、射出成形後上記蛇腹部
を拡径してコア型より引抜いて脱型するようにしたこと
を特徴とする自動車のエアダクト。1. A cavity formed by a cavity mold forming an outer surface of a hose and a core mold forming an inner surface of the hose.
A hose formed by injection-molding a thermoplastic elastomer having a hardness of HS (JIS A) 50 to 95 into an integrally bent shape, wherein the hose has an undercut on a part of its length. together with the comprised bellows portion, other than the bellows portion
An air duct for an automobile, characterized in that it has a reinforcing rib on its outer peripheral surface, and after the injection molding, the bellows portion is expanded in diameter so as to be pulled out from the core die and released from the core die.
熱可塑性エラストマーを射出成形してなる請求項１に記
載の自動車のエアダクト。Wherein hardness of the vehicle according to claim 1 obtained by injection molding the thermoplastic elastomer of H S (JIS A) 60~90 air duct.
れ、山部内面におけるホース内径Ｄ１／谷部内面におけ
るホース内径Ｄ２が１．１〜１・５の範囲にある請求項
１または２に記載の自動車のエアダクト。3. The bellows portion is formed with a pitch of 6 to 16 mm, and the hose inner diameter D1 on the mountain inner surface / the hose inner diameter D2 on the valley inner surface is in the range of 1.1 to 1.5. The air duct of the car described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03378098A JP3474759B2 (en) | 1998-01-30 | 1998-01-30 | Resin hose |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03378098A JP3474759B2 (en) | 1998-01-30 | 1998-01-30 | Resin hose |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11218266A JPH11218266A (en) | 1999-08-10 |
| JP3474759B2 true JP3474759B2 (en) | 2003-12-08 |
Family
ID=12395985
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03378098A Ceased JP3474759B2 (en) | 1998-01-30 | 1998-01-30 | Resin hose |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3474759B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4497546B2 (en) * | 2003-08-19 | 2010-07-07 | タイガースポリマー株式会社 | Method for forming an elastomer duct |
-
1998
- 1998-01-30 JP JP03378098A patent/JP3474759B2/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11218266A (en) | 1999-08-10 |
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