JP2567758B2 - Resin hose - Google Patents
Resin hoseInfo
- Publication number
- JP2567758B2 JP2567758B2 JP3185103A JP18510391A JP2567758B2 JP 2567758 B2 JP2567758 B2 JP 2567758B2 JP 3185103 A JP3185103 A JP 3185103A JP 18510391 A JP18510391 A JP 18510391A JP 2567758 B2 JP2567758 B2 JP 2567758B2
- Authority
- JP
- Japan
- Prior art keywords
- hose
- resin
- soft
- soft resin
- hard
- 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.)
- Expired - Fee Related
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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14598—Coating tubular articles
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14336—Coating a portion of the article, e.g. the edge of the article
- B29C2045/1445—Coating a portion of the article, e.g. the edge of the article injecting a part onto a blow moulded object
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は、自動車用エアーダク
トホース，フィラーホース等に用いて好適な樹脂ホース
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin hose suitable for use as an air duct hose for automobiles, a filler hose and the like.
【０００２】[0002]
【発明の背景】例えば自動車用のエアーダクトホース，
フィラーホース等において、近時これらをゴムホースに
代えて樹脂製のホースを使用することが検討され、実際
に使用されてきている。BACKGROUND OF THE INVENTION For example, air duct hoses for automobiles,
In a filler hose or the like, it has recently been considered to use a resin hose instead of a rubber hose, and it has been actually used.
【０００３】この樹脂製のホースは、ゴムホースに比べ
て比重が軽く軽量化が可能であること、軟質部分と硬質
部分とを有するものを一体成形品で構成可能であるこ
と、形状等の設計の自由度が高いこと等の利点を有して
いる。This resin hose has a smaller specific gravity and can be made lighter than a rubber hose, that one having a soft portion and a hard portion can be formed as an integrally molded product, and the design of the shape, etc. It has advantages such as high flexibility.
【０００４】ここで軟質部分と硬質部分とを有するもの
を一体成形品で構成できるとは次のことを意味する。例
えばゴムホースの場合、軟質部分と硬質部分とを一体品
で構成することは困難であって、この場合硬さが要求さ
れる部分については金属パイプで構成し、他の可撓性が
要求される部分についてこれをゴムホースで構成し、両
者を組み付けるといったことが行われるのに対して、樹
脂ホースの場合には硬さの必要な部分について硬質の樹
脂材を用いる一方、軟らかさが必要とされる部分につい
ては軟質材料を用い、ホース成形時にこれら材料を用い
て硬質部分と軟質部分とを一体に成形できるのである。
而してこのように軟質部分と硬質部分とを一体成形品で
構成できれば部品点数が低減し、低コスト化を図ること
ができる。Here, the fact that the one having a soft portion and the hard portion can be formed as an integrally molded product means the following. For example, in the case of a rubber hose, it is difficult to configure the soft part and the hard part as an integrated product. In this case, the part requiring hardness is composed of a metal pipe, and other flexibility is required. For the part, this is configured with a rubber hose, and both are assembled, while in the case of a resin hose, while a hard resin material is used for the part that needs hardness, softness is required. A soft material is used for the portion, and the hard portion and the soft portion can be integrally formed by using these materials when molding the hose.
Thus, if the soft portion and the hard portion can be integrally formed as described above, the number of parts can be reduced and the cost can be reduced.
【０００５】また形状等の設計自由度が高いとは、ゴム
ホースの場合には例えばこれを断面扁平形状にすると負
圧等が作用したとき同部分が変形し易くなるのに比べ
て、樹脂ホースの場合には硬質材料を用いることによ
り、扁平形状であってもこのような負圧にも十分耐え得
るようにでき、形状的な制限が少ないことを意味してい
る。In the case of a rubber hose, which has a high degree of freedom in designing, for example, when the rubber hose has a flat cross section, the same portion is easily deformed when a negative pressure is applied. In this case, the use of a hard material means that even a flat shape can sufficiently withstand such a negative pressure, which means that there are few restrictions on the shape.
【０００６】ところでこのような樹脂ホ−スの場合、そ
の成形方法としてブロー成形法が好適に採用されるが、
このブロー成形法は、一般に筒状且つ袋状のパリソンを
エアーの吹込みにより膨らませて成形型の内面に密着さ
せ、以て所定形状に成形する関係上、その外周面につい
ては成形型により所定形状に正確に成形できるものの、
内面側についてはフリーの状態で成形されることとなる
ため、形状，寸法精度が悪くなるのを避け得ない。By the way, in the case of such a resin hose, a blow molding method is preferably adopted as the molding method.
In this blow molding method, generally, a cylindrical and bag-shaped parison is inflated by blowing air so that the parison is closely adhered to the inner surface of the molding die and is molded into a predetermined shape. Although it can be molded accurately,
Since the inner surface is molded in a free state, it is unavoidable that the shape and dimensional accuracy deteriorate.
【０００７】しかしながらホ−スにあっては、その端部
等の接続部の内側に金属パイプ等相手部材を嵌入させて
接合し、その際に接合部分のシール性を確保する必要が
ある場合があり、このような場合に接続部内面の形状，
寸法精度が悪いと、即ちその内径寸法や肉厚がばらつい
ていたり、偏肉があったり、内面に凹凸があったりする
と、相手部材との接合部のシール性を十分確保すること
ができない。However, in the hose, there is a case where it is necessary to insert a mating member such as a metal pipe into the inside of a connecting portion such as an end portion of the hose to join the hose and to secure the sealing property of the joining portion. Yes, in such a case, the shape of the inner surface of the connection,
If the dimensional accuracy is poor, that is, if the inner diameter and wall thickness vary, the wall thickness is uneven, or the inner surface has irregularities, it is not possible to sufficiently secure the sealing property of the joint portion with the mating member.
【０００８】そこでこのようなブロー成形による樹脂ホ
−スの場合、接続部内面を研磨して所定形状，寸法に仕
上げ加工することが行われている。Therefore, in the case of such a blow-molded resin hose, the inner surface of the connecting portion is polished and finished into a predetermined shape and size.
【０００９】しかしながらこのような研磨を施すと、そ
れだけホ−ス製造工程が増すのみならず、加工部分及び
その周辺に研磨粉が残ってしまう。このためこの研磨粉
を除去するための洗浄工程も必要となってホ−ス製造に
おける工程が増々増加し、コストも高くなってしまう。However, such polishing not only increases the hose manufacturing process, but also leaves polishing powder on the processed portion and its periphery. For this reason, a cleaning step for removing the polishing powder is also required, and the number of steps in the hose manufacturing is increased and the cost is increased.
【００１０】そこで本発明者は、図４に一例を示してい
るように熱可塑性樹脂をブロー成形してホース本体１０
０を得、これを成形用の型１０２にセットして相手部材
との筒状の接続部（ここでは軸方向端部）１０４をイン
ジェクション成形する方法を発明し、先の特許願（特願
平３−３９１４５号）において提案した。Therefore, the inventor of the present invention blow-molds a thermoplastic resin as shown in FIG.
Inventing a method of obtaining 0, setting it in a molding die 102 and injecting a cylindrical connecting portion (here, an axial end portion) 104 with a mating member, the above-mentioned patent application (Japanese Patent Application No. 3-39145).
【００１１】[0011]
【課題を解決するための手段】本発明はこの先願発明の
改良に係るもので、この発明の樹脂ホースは熱可塑性樹
脂をブロー成形して成るホース本体と、該ホース本体を
成形用の型にセットした状態で熱可塑性樹脂をインジェ
クション成形して成る、相手部材との筒状の接続部とを
有し、且つ該ホース本体が硬質の樹脂で、該接続部が軟
質の樹脂でそれぞれ構成されるとともに該ホース本体の
長手方向中央部に可撓性の蛇腹部が設けられ、該蛇腹部
がホース長手方向前後の硬質の樹脂と異なる軟質樹脂に
て又は軟質樹脂を主として構成されていることを特徴と
する。DISCLOSURE OF THE INVENTION The present invention relates to an improvement of the invention of the prior application. A resin hose of the present invention is a hose body formed by blow molding a thermoplastic resin, and the hose body is used as a molding die. It has a tubular connecting portion with a mating member, which is formed by injection molding a thermoplastic resin in a set state, and the hose body is made of a hard resin, and the connecting portion is made of a soft resin. A flexible bellows portion is provided at the center of the hose body in the longitudinal direction, and the bellows portion is made of a soft resin different from the hard resin before or after the hose longitudinal direction, or mainly made of a soft resin. And
【００１２】［作用及び発明の効果］この発明によれ
ば、ホ−ス成形と同時にその端部等接続部内面を所定形
状，寸法に形成することができ、従来のようにホ−ス成
形後においてその接続部内面を研磨することを要しな
い。[Operation and Effect of the Invention] According to the present invention, the inner surface of the connecting portion such as the end portion can be formed into a predetermined shape and size at the same time as the hose molding. It is not necessary to polish the inner surface of the connecting portion.
【００１３】それ故かかる研磨工程を省略できるのみな
らず、その後において残留した研磨粉を取り除くための
洗浄工程も不要となり、全体の工程数が減少してホース
コストを低減することができる。Therefore, not only the polishing step can be omitted, but also the cleaning step for removing the polishing powder remaining thereafter becomes unnecessary, and the total number of steps can be reduced and the hose cost can be reduced.
【００１４】しかも本発明に従ってホ−スの接続部をイ
ンジェクション成形した場合、後において接続部内面を
研磨加工した場合に比べて接続部内面をより高い精度で
成形加工でき、このため接続部に金属パイプ等相手部材
を接続したときのシール性の信頼性が向上する。Further, when the hose connecting portion is injection-molded according to the present invention, the inner surface of the connecting portion can be formed with a higher degree of accuracy than the case where the inner surface of the connecting portion is polished later. The reliability of the sealing property when connecting a mating member such as a pipe is improved.
【００１５】この発明は、ホース本体を硬質の樹脂で、
接続部を軟質の樹脂で構成することを特徴としている。According to the present invention, the hose body is made of a hard resin,
It is characterized in that the connecting portion is made of a soft resin.
【００１６】例えば自動車用エアーダクトホースにおい
ては、使用時に負圧がホースに作用するため、ホース本
体が軟らかい材料で形成されていると本体が変形を起こ
し、これによりホースを通じてのエアーの吸引量が減少
してエンジンの不完全燃焼の原因となる。これを防ぐた
めにホース全体を硬い材料で形成すると、その端部を相
手部材に接合するときシール性が損なわれてしまう。For example, in an air duct hose for an automobile, a negative pressure acts on the hose during use. Therefore, if the hose body is made of a soft material, the hose body will be deformed, whereby the suction amount of air through the hose will be increased. It reduces and causes incomplete combustion of the engine. If the entire hose is made of a hard material in order to prevent this, the sealing property will be impaired when the end of the hose is joined to the mating member.
【００１７】しかるにこの発明に従ってホース本体を硬
質の樹脂材で、接続部を軟質の樹脂材で構成した場合、
ホースに耐負圧性等機械的強度を与えることができる一
方、接続部のシール性も良好とすることができる。However, when the hose body is made of a hard resin material and the connecting portion is made of a soft resin material according to the present invention,
While the hose can be provided with mechanical strength such as negative pressure resistance, the sealing property of the connection portion can be improved.
【００１８】本発明は、可撓性の蛇腹部をホース本体の
中央部に設け、これをその長手方向前後の硬質材料と異
なる軟質樹脂材料にて構成することを特徴とするもので
あり、このことからホース全体の振動吸収効率が良好と
なる利点が得られる。The present invention is characterized in that a flexible bellows portion is provided in the central portion of the hose body and is made of a soft resin material different from the hard material in the longitudinal direction. Therefore, there is an advantage that the vibration absorption efficiency of the entire hose is good.
【００１９】一般に、比較的長さの短いブロー成形ホー
スにあっては、図６（Ａ）に示しているように軟質樹脂
から成る蛇腹部１０６がホース端部、即ち相手側との接
続側端部近傍に配置される。Generally, in a blow-molded hose having a relatively short length, as shown in FIG. 6 (A), the bellows portion 106 made of a soft resin has a hose end portion, that is, a connection side end with the other side. It is located near the section.
【００２０】これは軟質樹脂から成る蛇腹部１０６をホ
ースの中央に位置させると、ホースをブロー成形する
際、硬質樹脂と軟質樹脂との材料切替え回数が多くなっ
てホース製造が難しくなるからである。This is because if the bellows portion 106 made of a soft resin is located at the center of the hose, the number of times the material is switched between the hard resin and the soft resin is large during blow molding of the hose, which makes it difficult to manufacture the hose. .
【００２１】具体的に説明すると、ホースをブロー成形
し且つ相手側との接続側端部を軟質樹脂で、ホース本体
を硬質樹脂でそれぞれ構成する場合、図５に示している
ように押出口１０８から押し出される材料を軟質樹脂材
１１０から硬質樹脂材１１２に、次いで硬質樹脂材１１
２から軟質樹脂材１１０に切り替えてパリソン１１４を
形成し、これを所定のブロー成形型にセットしてブロー
成形することとなるが、この場合材料の切替ゾーンをホ
ース長手方向に所定長さ範囲に亘って見込んでおかなけ
ればならず、従ってホース中央部に軟質樹脂から成る蛇
腹部を設けると、材料の切替回数が著しく多くなって、
短いホースの場合、ホース製造が難しくなるのである
（上記方法では材料のシャープな切替えは困難であ
る）。More specifically, when the hose is blow-molded and the end portion on the connection side with the mating member is made of a soft resin and the hose body is made of a hard resin, as shown in FIG. The material extruded from the soft resin material 110 to the hard resin material 112, and then the hard resin material 11
The parison 114 is formed by switching from 2 to the soft resin material 110, and the parison 114 is set in a predetermined blow molding die for blow molding. In this case, the material switching zone is within a predetermined length range in the longitudinal direction of the hose. Therefore, if a bellows part made of a soft resin is provided in the center of the hose, the number of times of material switching is significantly increased,
In the case of a short hose, it is difficult to manufacture the hose (it is difficult to change the material sharply by the above method).
【００２２】また材料の切替位置が各ホース毎でばらつ
き易く、軟質樹脂から成る蛇腹部をホースの中央部に配
置した場合、材料の切替回数が著しく多くなるためホー
スの品質が揃い難くなるのも、蛇腹部をホース端部に配
置することの理由の一つである。Further, the material switching position is likely to vary from one hose to another, and when a bellows part made of a soft resin is arranged in the center of the hose, the number of times of material switching is significantly increased, which makes it difficult to obtain uniform quality of the hose. , Is one of the reasons for placing the bellows at the end of the hose.
【００２３】尤も図６（Ｂ）に示しているようにホース
中央部に軟質樹脂から成る蛇腹部１０６を配置し、ホー
ス端部からこの蛇腹部１０６に至るまで軟質の樹脂材に
て構成することも考えられるが、この場合には高価な軟
質樹脂材を不必要に多く使用することとなり、コスト上
不利であるのみならず、ホースの耐負圧性等機械的特性
が低下する問題を生ずる。軟質樹脂材で構成した部分の
耐負圧性等機械的強度が低くなるからである。As shown in FIG. 6B, a bellows portion 106 made of a soft resin is arranged in the center of the hose, and a soft resin material is formed from the end of the hose to the bellows portion 106. However, in this case, an expensive soft resin material is unnecessarily used in large amounts, which is not only disadvantageous in terms of cost but also causes a problem that mechanical characteristics such as negative pressure resistance of the hose are deteriorated. This is because the mechanical strength such as negative pressure resistance of the portion made of the soft resin material becomes low.
【００２４】しかるに本発明は相手側との接続部をイン
ジェクション成形するものであるため、蛇腹部を軟質樹
脂材で構成する場合においてもブロー成形に際して材料
の切替え回数を少なくでき、従ってかかる蛇腹部をホー
ス中央部に容易に配置することができる。However, according to the present invention, since the connecting portion with the other side is injection-molded, even when the bellows portion is made of a soft resin material, it is possible to reduce the number of times of material switching during blow molding, and thus the bellows portion can be reduced. It can be easily placed in the center of the hose.
【００２５】そして蛇腹部をホース中央部に配置するこ
とにより、これをホース端部近傍に配置した場合に比べ
て振動を良好に吸収し得るのである。而して振動を良好
に吸収できればホースに加わる負荷も低減し、寿命を向
上させることができる。By arranging the bellows portion in the central portion of the hose, vibration can be absorbed better than in the case where the bellows portion is arranged in the vicinity of the end portion of the hose. Thus, if the vibration can be absorbed well, the load applied to the hose can be reduced and the life can be improved.
【００２６】また本発明によれば高価な軟質樹脂材の使
用量を少なくできるのでホースコストを低減でき、加え
て軟かさが要求される部分を除いてホース全体を硬質樹
脂材で構成できるため、ホースの耐負圧性等機械的強度
を強くすることができる。Further, according to the present invention, since the amount of expensive soft resin material used can be reduced, the cost of the hose can be reduced, and in addition, the entire hose can be made of a hard resin material except for the portion where softness is required. Mechanical strength such as negative pressure resistance of the hose can be increased.
【００２７】[0027]
【実施例】次に本発明の実施例を図面に基づいて詳しく
説明する。図１及び図２において、１０は例えば自動車
用エアーダクトホース等として用いられる樹脂ホースで
あって、ホース本体１２と、長手方向両端部の、相手側
筒体との接続部となる接続側端部１４とを有している。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the drawings. In FIGS. 1 and 2, reference numeral 10 denotes a resin hose used as, for example, an air duct hose for automobiles, and the hose body 12 and the connection side end portions of the longitudinal end portions of the hose body 12 which are connection portions with the mating cylinder 14 and.
【００２８】このホース１０は、ホース本体１２が硬質
の樹脂で構成されており、また接続側端部１４が軟質の
樹脂で構成されている。ここで硬質樹脂の一例として、
ロックウェル硬度９４（Ｒスケール）のポリプロピレン
樹脂（例えば三菱油化社製のＥＣ−９Ｂ）を、また接続
側端部１４用の軟質樹脂としてショアＡ硬度７５のポリ
プロピレン樹脂＋ＥＰＤＭポリマアロイ（例えば日本モ
ンサント社製のサントプレーン１０１−７５）を例示で
きる。In this hose 10, the hose body 12 is made of a hard resin, and the connection side end 14 is made of a soft resin. Here, as an example of hard resin,
A polypropylene resin with a Rockwell hardness of 94 (R scale) (for example, EC-9B manufactured by Mitsubishi Petrochemical Co., Ltd.), and a polypropylene resin with a Shore A hardness of 75 as a soft resin for the connecting side end portion 14 + EPDM polymer alloy (for example, Japan Monsanto Co., Ltd.) Santoprene 101-75) manufactured by K.K.
【００２９】ホース本体１２は、押出機先端より押し出
されたパリソンをブロー成形型にセットし、その内側に
エアーをブローしてパリソンを成形型に押圧して成形し
たブロー成形品である。The hose body 12 is a blow-molded product in which the parison extruded from the tip of the extruder is set in a blow mold and air is blown inside the parison to press the parison into the mold so that the parison is molded.
【００３０】一方接続側端部１４は、このブロー成形品
（ブロー成形品は成形時に長手方向端部に生じたバリが
カットされ、除去されたものである）を成形型にセット
した状態で上記軟質樹脂をインジェクション成形し、同
時にホース本体１２に一体化したものである。On the other hand, the connection-side end portion 14 is set in a state where the blow-molded product (the blow-molded product is obtained by cutting and removing burrs generated at the end in the longitudinal direction at the time of molding) is set in a molding die. The soft resin is injection-molded and integrated with the hose body 12 at the same time.
【００３１】従って接続側端部１４とホース本体１２と
の境界部はシャープであって、端部形状は予め設定した
所定の形状、具体的にはここでは接続側端部１４の嵌合
凸部とホース本体１２側の嵌合凹部との嵌合形状となっ
ている。Therefore, the boundary between the connection-side end 14 and the hose body 12 is sharp, and the end shape is a preset predetermined shape, specifically, here, the fitting protrusion of the connection-side end 14. And a fitting recess on the hose body 12 side.
【００３２】ホース本体１２の中央部には、接続側端部
１４と同様の軟質樹脂から成る蛇腹部１６が形成されて
いる。勿論この蛇腹部１６は必要に応じて他の種類の軟
質樹脂に替えても差し支えない。At the center of the hose body 12, a bellows portion 16 made of a soft resin similar to the connection side end portion 14 is formed. Of course, the bellows portion 16 may be replaced with another type of soft resin as needed.
【００３３】この蛇腹部１６は、ホース本体１２の他の
部分１８と同様にブロー成形によって成形されたもので
ある。具体的な手法は、例えば前述の図５に示している
ようにパリソンを押出口から押し出す際に先ず硬質樹脂
材を押し出して次に軟質樹脂材に切替え、次に再び硬質
樹脂材に切り替える。そしてこのようにして得られたパ
リソンをブロー成形型にセットしてブロー操作するとい
ったものである。The bellows portion 16 is formed by blow molding like the other portion 18 of the hose body 12. Specifically, for example, as shown in FIG. 5 described above, when the parison is extruded from the extrusion port, the hard resin material is first extruded, then switched to the soft resin material, and then switched to the hard resin material again. Then, the parison thus obtained is set in a blow mold and the blow operation is performed.
【００３４】このブロー成形では、硬質樹脂材から軟質
樹脂材（蛇腹部）への材料の切替え、或いは軟質樹脂材
から硬質樹脂材への材料の切替えが、材料の押出しにつ
れて漸次行われることとなるため、それら材料切替部の
境界部がシャープな形状とならず、ホース長手方向に自
然的に材料が切り替わり、移行する形態となる。従って
材料の切替り部分は、ホース長手方向に所定の長さに亘
っている。In this blow molding, the material switching from the hard resin material to the soft resin material (bellows portion) or the material switching from the soft resin material to the hard resin material is gradually performed as the material is extruded. Therefore, the boundary portion of these material switching portions does not have a sharp shape, and the material is naturally switched in the longitudinal direction of the hose to be transferred. Therefore, the material switching portion extends over a predetermined length in the longitudinal direction of the hose.
【００３５】従来の一般のブロー成形ホースの場合、接
続側端部もホース本体と一体にブロー成形される。この
場合蛇腹部をホース中央部に配置すると、パリソンの押
出しの際先ず接続側端部用に軟質樹脂材を押出し、次い
で硬質樹脂材に材料切替えし、次に再び蛇腹部用に軟質
樹脂材に材料切替えし、そして再び硬質樹脂材，次に軟
質樹脂材へと材料切替えを頻繁に行なうことが必要であ
る。しかしながらこのようなことは短いホースの場合実
際には困難であって、通常は行われない。In the case of a conventional general blow-molded hose, the connection side end is also blow-molded integrally with the hose body. In this case, if the bellows part is placed in the center of the hose, when the parison is extruded, the soft resin material is first extruded for the connection side end, then the material is switched to the hard resin material, and then the soft resin material is again used for the bellows part. It is necessary to switch the material and then frequently to switch again to the hard resin material and then to the soft resin material. However, this is practically difficult with short hoses and is usually not done.
【００３６】しかるに本例のホース１０の場合、接続側
端部１４がインジェクション成形されるから、ブロー成
形に当って材料の切替えは硬−軟−硬と行なうだけで良
く、蛇腹部１６をホース中央に配置しても支障なくホー
ス製造できる。However, in the case of the hose 10 of the present embodiment, since the connection side end portion 14 is injection-molded, it is only necessary to switch the material between hard and soft-hard during blow molding. The hose can be manufactured without any problem even if it is placed in the.
【００３７】而して蛇腹部１６をホース中央部に配置し
得ることによってホース１０の振動吸収効率が良好とな
り、またホース１０の相手への組付性も良好となる。By arranging the bellows portion 16 in the central portion of the hose, the vibration absorbing efficiency of the hose 10 becomes good, and the assembling ability of the hose 10 to the other party becomes good.
【００３８】これにより組付けの際、或いは使用状態で
ホース１０にかかる負荷を軽減でき、ホース１０の耐久
寿命を延ばすことができる。As a result, the load applied to the hose 10 at the time of assembling or in use can be reduced, and the durable life of the hose 10 can be extended.
【００３９】また本例のホース１０の場合、上記図６
（Ｂ）に示すホースと異なって高価な軟質樹脂材の使用
量を必要最小限とすることができるため、ホースのコス
トを安くすることができ、加えて軟質樹脂材とする必要
の無い部分はすべて硬質樹脂で構成できるため、耐負圧
性等の機械的性能も良好となる。Further, in the case of the hose 10 of this example, the above-mentioned FIG.
Unlike the hose shown in (B), since the amount of expensive soft resin material used can be minimized, the cost of the hose can be reduced, and in addition, there is no need for the soft resin material. Since all can be made of hard resin, mechanical performance such as negative pressure resistance is also good.
【００４０】尚、上記蛇腹部１６は必ずしも全て軟質樹
脂で構成しなければならないわけではなく、図３に示し
ているように表層の薄い部分１６ａを硬質樹脂で、内側
の厚肉の部分１６ｂを軟質樹脂で構成することも可能で
ある。またこれと反対に、表面を厚肉の軟質樹脂とし、
内側を薄肉の硬質樹脂にて構成することも可能である。The bellows portion 16 does not necessarily have to be made of a soft resin. As shown in FIG. 3, the thin surface portion 16a is made of hard resin and the thick inner portion 16b is made of hard resin. It is also possible to use a soft resin. On the contrary, the surface is made of thick soft resin,
It is also possible to configure the inside with a thin hard resin.
【００４１】この他、本発明はその主旨を逸脱しない範
囲において、当業者の知識に基づき様々な変更を加えた
態様で実施可能である。In addition to the above, the present invention can be carried out in a mode in which various modifications are made based on the knowledge of those skilled in the art without departing from the spirit of the invention.
【図１】本発明の一実施例である樹脂ホースの断面図で
ある。FIG. 1 is a cross-sectional view of a resin hose which is an embodiment of the present invention.
【図２】その樹脂ホースの斜視図である。FIG. 2 is a perspective view of the resin hose.
【図３】本発明の他の実施例の要部断面図である。FIG. 3 is a sectional view of a main part of another embodiment of the present invention.
【図４】本願の先願に係る発明の一実施例の説明図であ
る。FIG. 4 is an explanatory diagram of an embodiment of the invention according to the prior application of the present application.
【図５】本発明の背景説明のための説明図である。FIG. 5 is an explanatory diagram for explaining the background of the present invention.
【図６】本発明の背景説明のための説明図である。FIG. 6 is an explanatory diagram for explaining the background of the present invention.
１０ 樹脂ホース １２ ホース本体 １４ 接続側端部 １６ 蛇腹部 10 Resin Hose 12 Hose Main Body 14 Connection Side End 16 Bellows
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｆ１６Ｌ 11/11 Ｆ１６Ｌ 11/11 // Ｂ２９Ｌ 23:18 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI technical display area F16L 11/11 F16L 11/11 // B29L 23:18
Claims (1)
ス本体と、該ホース本体を成形用の型にセットした状態
で熱可塑性樹脂をインジェクション成形して成る、相手
部材との筒状の接続部とを有し、且つ該ホース本体が硬
質の樹脂で、該接続部が軟質の樹脂でそれぞれ構成され
るとともに該ホース本体の長手方向中央部に可撓性の蛇
腹部が設けられ、該蛇腹部がホース長手方向前後の硬質
の樹脂と異なる軟質樹脂にて又は軟質樹脂を主として構
成されていることを特徴とする樹脂ホース。1. A hose main body formed by blow molding a thermoplastic resin, and a tubular connecting portion with a mating member formed by injection molding the thermoplastic resin in a state where the hose main body is set in a molding die. The hose body is made of a hard resin and the connecting portion is made of a soft resin, and a flexible bellows portion is provided in the longitudinal center of the hose body. Is made of a soft resin different from the hard resin before and after the longitudinal direction of the hose or mainly made of a soft resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3185103A JP2567758B2 (en) | 1991-06-29 | 1991-06-29 | Resin hose |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3185103A JP2567758B2 (en) | 1991-06-29 | 1991-06-29 | Resin hose |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH058285A JPH058285A (en) | 1993-01-19 |
| JP2567758B2 true JP2567758B2 (en) | 1996-12-25 |
Family
ID=16164910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3185103A Expired - Fee Related JP2567758B2 (en) | 1991-06-29 | 1991-06-29 | Resin hose |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2567758B2 (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2561421B2 (en) * | 1993-05-17 | 1996-12-11 | 株式会社ウエスタン・アームス | Toy gun with automatic bullet feeding mechanism |
| JP2561429B2 (en) * | 1993-10-08 | 1996-12-11 | 株式会社ウエスタン・アームス | Toy gun with automatic bullet feeding mechanism |
| TW410973U (en) * | 1997-10-16 | 2000-11-01 | Western Arms Kk | Model gun with automatic bullet supplying mechanism |
| JP2989162B2 (en) * | 1997-12-10 | 1999-12-13 | 株式会社ウエスタン・アームス | Toy gun with automatic bullet supply mechanism |
| JP2871657B1 (en) * | 1998-01-08 | 1999-03-17 | 株式会社ウエスタン・アームス | Toy gun with automatic bullet supply mechanism |
| AU2002347470A1 (en) * | 2002-11-21 | 2004-06-15 | Emerson Electric Co. | Waste line connector assembly for isolating vibrations of a waste disposer |
| JP4420279B2 (en) | 2003-12-22 | 2010-02-24 | 株式会社フコク | Plastic Constant Velocity Joint Boot Manufacturing Equipment Plastic Constant Velocity Joint Boot Manufacturing Method Resin Constant Velocity Joint Boot |
| US20070224374A1 (en) * | 2006-03-22 | 2007-09-27 | Graham Packaging Company, Lp | Lightweight article and method of manufacture |
| JP2010159813A (en) * | 2009-01-08 | 2010-07-22 | Inoac Housing & Construction Materials Co Ltd | Resin pipe with joint |
| JP2011058405A (en) * | 2009-09-09 | 2011-03-24 | Kojima Press Industry Co Ltd | Air cleaner hose |
| KR101326839B1 (en) * | 2011-12-07 | 2013-11-11 | 현대자동차주식회사 | Air intake hose for vehicle and production method thereof |
| FR3007313B1 (en) * | 2013-06-24 | 2016-01-15 | F M B Ind | OVERMOLDING UNIT FOR A BIMARY COMPONENT AND A BIMARY COMPONENT MANUFACTURED FROM THE OVERMOLDING UNIT |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60168625A (en) * | 1984-02-13 | 1985-09-02 | Ekuseru Kk | Manufacture of hollow molded article provided with composite material and manufacturing device thereof |
| JPS63158382A (en) * | 1986-12-18 | 1988-07-01 | 鬼怒川ゴム工業株式会社 | Air duct |
| JPS63239037A (en) * | 1987-03-27 | 1988-10-05 | Calsonic Corp | Synthetic resin suction pipe for engine and manufacture thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0627907Y2 (en) * | 1986-06-06 | 1994-07-27 | エクセル株式会社 | Resin intake duct |
| JPH0538964Y2 (en) * | 1987-06-09 | 1993-10-01 |
-
1991
- 1991-06-29 JP JP3185103A patent/JP2567758B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60168625A (en) * | 1984-02-13 | 1985-09-02 | Ekuseru Kk | Manufacture of hollow molded article provided with composite material and manufacturing device thereof |
| JPS63158382A (en) * | 1986-12-18 | 1988-07-01 | 鬼怒川ゴム工業株式会社 | Air duct |
| JPS63239037A (en) * | 1987-03-27 | 1988-10-05 | Calsonic Corp | Synthetic resin suction pipe for engine and manufacture thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH058285A (en) | 1993-01-19 |
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