WO1986002037A1 - Bellows rubber hose and method of manufacturing the same - Google Patents

Bellows rubber hose and method of manufacturing the same Download PDF

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Publication number
WO1986002037A1
WO1986002037A1 PCT/JP1984/000464 JP8400464W WO8602037A1 WO 1986002037 A1 WO1986002037 A1 WO 1986002037A1 JP 8400464 W JP8400464 W JP 8400464W WO 8602037 A1 WO8602037 A1 WO 8602037A1
Authority
WO
WIPO (PCT)
Prior art keywords
rubber hose
bellows
mandrel
bellows rubber
outer periphery
Prior art date
Application number
PCT/JP1984/000464
Other languages
French (fr)
Japanese (ja)
Inventor
Hiroyuki Hoshijima
Kunio Seno
Yoshiaki Yunoki
Original Assignee
Marugo Rubber Kogyo Co., Ltd.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Marugo Rubber Kogyo Co., Ltd. filed Critical Marugo Rubber Kogyo Co., Ltd.
Priority to PCT/JP1984/000464 priority Critical patent/WO1986002037A1/en
Publication of WO1986002037A1 publication Critical patent/WO1986002037A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D23/00—Producing tubular articles
    • B29D23/18—Pleated or corrugated hoses
    • 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
    • B29C49/48—Moulds
    • 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
    • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • B29C67/0014—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 for shaping tubes or blown tubular films
    • B29C67/0022—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 for shaping tubes or blown tubular films using an internal mandrel
    • B29C67/0025—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 for shaping tubes or blown tubular films using an internal mandrel and pressure difference
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2021/00—Use of unspecified rubbers as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/24—Condition, form or state of moulded material or of the material to be shaped crosslinked or vulcanised
    • B29K2105/243—Partially cured
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/18—Pleated or corrugated hoses

Definitions

  • the present invention provides a bellows rubber hose and a bellows rubber hose which are formed with a smooth outer surface, have a strength of 5 and are excellent in appearance, and are suitable for use as a conduit for various fluids. It concerns the manufacturing method. Conventionally, 10 rubber hoses with irregularities on the outer surface, such as bellows, cannot be extruded, so a split mold method was used.
  • a mold having the required shape was formed by the upper mold 2 and the lower mold 3 outside the core 1, and rubber was pressed into the gap 4.
  • the rubber press-fitting pressure must be extremely high, so that the rubber flows into the mating surfaces 5 and 5 of the upper mold 2 and the lower mold 3 slightly, A burr generated along the hand direction of the product, that is, it becomes a single line, which is easily broken from this part.
  • a mold is used only as an outer mold, and a rubber hose before molding is first fitted inside the mold.
  • the present invention provides a bellows rubber hose that does not have such a problem and a method for manufacturing the same.
  • the outer periphery of the bellows rubber hose is raised to a mold matching structure for molding.
  • the burr part that is, has no parting line, and is formed by a completely smooth surface.
  • such a bellows rubber hose is composed of a single layer or multiple layers.
  • the present invention provides a bellows portion on the outer periphery of the mandrel, a hollow portion inside the mandrel, and a number of holes communicating with the hollow portion and the outside in the bellows portion of the mandrel.
  • a non-vulcanized rubber hose having a straight cylindrical shape is externally fitted around the outer periphery of the mandrel, and the inside of the hollow portion of the mandrel is set to a lower pressure than the outside under vulcanization conditions.
  • a method for producing a bellows rubber hose wherein the rubber hose is formed in a bellows-like shape along the outer peripheral shape of the mandrel.
  • the bellows rubber hose described above can be manufactured efficiently and at low cost.
  • the above-mentioned holes are formed at the bottom of the valleys of the bellows to further enhance the forming effect.
  • Figures 1 and 2 are partial cross-sectional views showing the relationship between the mandrel and rubber hose after molding, 3rd orchid ⁇ , one OMPI, ...
  • FIG. 4 is a cross-sectional view of a conventional example using a split mold method.
  • Figures 1 and 2 are partial cross-sectional views showing the relationship between the mandrel and the rubber hose when the rubber hose has a single layer and a multi-layer, respectively.
  • the barrel 6 has a hollow portion 7 inside, and the hollow portion 7 and the outside (outside air) can be freely communicated via a plug 8 inserted into a wall at one end.
  • straight cylindrical portions 9 and 9 are formed on both sides, and a bellows portion 10 (not a continuous spiral shape) shaped like an abacus ball is added to the center.
  • a bellows portion 10 not a continuous spiral shape
  • a large number of small-diameter holes 11 are formed radially in the bellows portion 10, particularly in the valley portion and the straight cylindrical portions 9, 9, and the hollow portion 7 and the outside are formed. Make sure that air can be communicated.
  • FIG. 3 is a partial cross-sectional view showing a state in which an unvulcanized straight-cylindrical rubber hose 12 extruded and formed from the mandrel 6 is extrapolated from one side thereof. Then, the inside of both ends of the rubber hose 12 and the straight cylindrical parts 9 and 9 of the mandrel 6 are sealed.
  • this is placed inside a vulcanizing can, ripened to a predetermined temperature, and the air pressure in the hollow part 7 of the mandrel 6 is adjusted to be lower than that of the outside.
  • the outside is set to atmospheric pressure and the air in the hollow part 7 is evacuated by a vacuum pump or the like, or positive or eclipse pressure is applied to the outside and the hollow part 7 ⁇ , respectively.
  • a vacuum pump or the like or positive or eclipse pressure is applied to the outside and the hollow part 7 ⁇ , respectively.
  • positive or eclipse pressure is applied to the outside and the hollow part 7 ⁇ , respectively.
  • Various cases are conceivable, such as one in which the air pressure in the part 7 is set smaller than that of the outside.
  • a hose or a vibe connected to an appropriate air source should be connected to the plug 8 described above.
  • the pressure between the rubber hose 12 and the outer periphery of the mandrel 6 also decreases because the holes 11 1 'are present. It is formed to conform to the contours of the bellows part 10 and the straight cylindrical parts 9, 9 of the mandrel 6, and is cured and stabilized by the vulcanizing operation during this time.
  • the bellows rubber foam "" 14 thus formed is pulled out of the mandrel 6, the air is again injected from the plug 8 or the like, and the air is discharged through the holes 11 ⁇ . Through the mandrel 6 and inflate the bellows rubber hose 14 outward. At this time. Loosen one sealing means and pull it to one side, it will come off easily.
  • the bellows rubber hose 14 which is a product, is composed of a matte smooth surface having no parting line on its outer peripheral surface. It does not cause rupture, cracks or other situations.
  • the space is smaller than that of the outer mold only, and a large number of pieces can be placed in a vulcanizing can.
  • the heating effect is high because the hot air can be applied directly when heating.
  • the bellows rubber hose 14 is constituted by a single layer, but according to the method of the present invention, it can be easily formed even by a multilayer.
  • the optimum material setting can be made according to the usage conditions.
  • the outer layer may be a heat and weather resistant layer and the inner layer may be a gasoline resistant layer.
  • the bellows rubber hose 14 which is made up of a smooth surface having no parting line on the outer peripheral surface, is made of rubber and a bellows, and has flexibility and vibration absorption. It can be applied to any application given its superior properties.
  • the most suitable example is to use the joint hose of the fuel inlet of a car or the joint hose of a solar water heater as a fluid conduit. It is also suitable for application to a ring or a damper.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

Bellows rubber hose having all the outer peripheral surface thereof constituted by a smooth surface and a method of manufacturing the bellows rubber hose. A typical conventional bellows rubber hose can be manufactured only by a split-mold method, which unavoidably involves a parting line formed on the outer peripheral surface thereof. The conventional bellows rubber hose is, therefore, neither strong nor attractive. In the method of the present invention, only a mandrel is employed which serves as an inner mold having a hollow inside and small bores for providing communication between the inside and the outside air. An unvulcanized rubber hose is fitted on the outer periphery of the mandrel and is then vulcanized. During the vulcanization, the pressure in the hollow portion is made lower than the outside pressure, whereby the rubber hose is brought into close contact with the mandrel such as to be formed into a desired shape. This method makes it possible to form not only a bellows rubber hose having a single layer but also one having a plurality of layers. The bellows rubber hose of the invention is both strong and attractive and is therefore suitably employed as, for example, a conduit for guiding various kinds of fluid.

Description

明 細  Details
蛇腹ゴムホースおよびその製造方法 この発明は， 外周面すべてが滑面で形成され， 強度 5 , 美観に優れたものである上， これを各種流体の案內 導管等に用いれば好適な， 蛇腹ゴムホースおよびその 製造方法に関するものである。 従来， 外周面に凹凸を有する， 例えば， 蛇腹伏等の 10 ゴムホースは， 押し出し成形ではできないので， 割型 による方法をとつていた。  The present invention provides a bellows rubber hose and a bellows rubber hose which are formed with a smooth outer surface, have a strength of 5 and are excellent in appearance, and are suitable for use as a conduit for various fluids. It concerns the manufacturing method. Conventionally, 10 rubber hoses with irregularities on the outer surface, such as bellows, cannot be extruded, so a split mold method was used.
すなわち， 第 4図に示すように， 中子 1 の外側に上 型 2 と下型 3によって所要の形状の型を形成し， この 間隙 4内にゴムを圧入するものであった。  In other words, as shown in Fig. 4, a mold having the required shape was formed by the upper mold 2 and the lower mold 3 outside the core 1, and rubber was pressed into the gap 4.
15 しかし， この方法によると， ゴムの圧入圧は非常に 強く しなければならない関係'上， どう しても， ゴムが 上型 2 と下型 3 の合わせ面 5 , 5内に若干流れ込み， これが製品の县手方向に沿って生ずるバリ部， すなわ ち， ノ、 ·一ティ ングライ ンとなり， この部分から割れ易 15 However, according to this method, the rubber press-fitting pressure must be extremely high, so that the rubber flows into the mating surfaces 5 and 5 of the upper mold 2 and the lower mold 3 slightly, A burr generated along the hand direction of the product, that is, it becomes a single line, which is easily broken from this part.
·、* ·, *
20 いとともに， 美観を損ない， 製造上および機能上のネ ックとなっていたのである。  At the same time, the aesthetic appearance was impaired, and it was a manufacturing and functional neck.
これを改善するものとして， 日本特開昭 53 - 126083 号公報に見られるように， 型を外型のみとして， まず , 型の内部に成形前のゴムホースを内嵌し， このホー In order to improve this, as shown in Japanese Patent Application Laid-Open No. 53-126083, a mold is used only as an outer mold, and a rubber hose before molding is first fitted inside the mold.
25 スの内部を高圧にして型の形伏に沿わせて成形すると ともに， 型から製品を抜き出すときには， 今度はホー ス内部を負圧にして製品を縮小させ， 型の一端から引 き抜ぐ方法が提案されている。 25 When the inside of the mold is pressurized and molded In both cases, when removing the product from the mold, a method has been proposed in which the product is contracted by applying a negative pressure to the inside of the hose and then pulled out from one end of the mold.
しかし， 製品自体を縮小させるといっても， 各部の 強度は一定ではないから， これを一様に縮小させるこ とは不可能なことで， せいぜい偏平な形にする程度で ある。 さらに， これを外型のー鏽から引き抜けること が必要であるから， 成形できる製品自体の形伏はおの ずから制限があり， とても， 蛇腹ホースのような， 凹 凸の程度が激しく， かつ， その頻度の大なるものは成 形できなかったのである。  However, even if the product itself is reduced, the strength of each part is not constant, so it is impossible to reduce it uniformly, and it is only a flat shape at best. Furthermore, since it is necessary to pull this out of the outer mold, the shape of the product itself that can be formed is naturally limited, and the degree of unevenness is very high like a bellows hose, and The most frequent could not be formed.
また， 未加硫ゴムのホースを用いて， これを単に螺 旋伏にするのみなら， ホース外周に螺旋ピッチに応じ た紐等を巻いて加硫処理をすればできないことはない が， 非常に手間がかかって現実的ではない上， 成形で きる凹凸の差にも限界があった。 特に， 可撓性を高め るため， 算盤玉を継ぎ足したような形状の蛇腹形伏に するとすれば， 1 ピッチ毎に紐を結んでゆかなければ ならないとともに， その結果， ΕΙ ώの差にも不揃いが 生じ， 実際問題無理であった。  In addition, if simply using an unvulcanized rubber hose to make it spiral, it would not be possible to wrap it with a cord or the like corresponding to the helical pitch around the hose and vulcanize it. It is time-consuming and impractical, and there is a limit to the difference in irregularities that can be formed. In particular, if the bellows-like shape is formed by adding abacus balls to increase flexibility, the strings must be tied at every pitch, and as a result, the difference in ΕΙ に もMisalignment occurred, and in fact it was impossible.
そこで， この発明は， このようなこ とがない蛇腹ゴ ムホースと， その製造方法を提供したものである。  Thus, the present invention provides a bellows rubber hose that does not have such a problem and a method for manufacturing the same.
発明の開  Invention opening
この発明は， まず， 蛇腹ゴムホースにおいて， この 蛇腹ゴムホースの外周を， 成形用の型合わせ構造に起 因するバリ部， すなわち， パーテイ ングライ ンを有し ない， まった く の滑面で形成したものである。 In the present invention, first, in the bellows rubber hose, the outer periphery of the bellows rubber hose is raised to a mold matching structure for molding. The burr part, that is, has no parting line, and is formed by a completely smooth surface.
これにより， このバーティ ングライ ンに沿う強度的 , 美観的な欠点が解消される。  This eliminates the strength and aesthetic disadvantages of this vertical line.
次に， このような蛇腹ゴムホースは， 単層， あるい は複層で構成される。  Next, such a bellows rubber hose is composed of a single layer or multiple layers.
これにより， 外的条件等に応じた蛇腹ゴムホースの 最適の材質， 厚み等の形態選択ができることになり， 結果として， 高強度， 軽量， 低コス トが可能になる。  As a result, it is possible to select the optimal material and thickness of the bellows rubber hose according to external conditions, etc., resulting in high strength, light weight, and low cost.
さらに， この発明は， マン ドレルの外周には蛇腹部 を， 内部には中空部をそれぞれ形成する他， 前記マン ド レルの前記蛇腹部に， 前記中空部と外部とを連通す る多数の孔を穿孔するとともに， 前記マ ン ド レル外周 に直円筒伏の未加硫のゴムホースを外嵌し， 加硫条件 下， 前記マ ン ド レルの中空部内を外部より低圧にする こ とで， 前記ゴムホースを前記マ ン ド レルの外周形状 に沿う蛇腹伏に成形することを特徴とする蛇腹ゴムホ ースの製造方法も提供したものである'。  Furthermore, the present invention provides a bellows portion on the outer periphery of the mandrel, a hollow portion inside the mandrel, and a number of holes communicating with the hollow portion and the outside in the bellows portion of the mandrel. And a non-vulcanized rubber hose having a straight cylindrical shape is externally fitted around the outer periphery of the mandrel, and the inside of the hollow portion of the mandrel is set to a lower pressure than the outside under vulcanization conditions. There is also provided a method for producing a bellows rubber hose, wherein the rubber hose is formed in a bellows-like shape along the outer peripheral shape of the mandrel.
これにより， 前記した蛇腹ゴムホースを能率良く， かつ， 低コス トで製造できるのである。  As a result, the bellows rubber hose described above can be manufactured efficiently and at low cost.
また， 前記した孔は， 蛇腹部の谷部の底に穿孔する ことにより， 成形効果を一層高めたものである。  In addition, the above-mentioned holes are formed at the bottom of the valleys of the bellows to further enhance the forming effect.
H面の簡単な鋭明  H-plane simple sharp
第 1図および第 2図は成形後におけるマン ド レルと ゴムホースの関係を示すそれぞれの一部断面図， 第 3 蘭^ 、 一 OMPI， ... Figures 1 and 2 are partial cross-sectional views showing the relationship between the mandrel and rubber hose after molding, 3rd orchid ^, one OMPI, ...
、 図は成形前における同じく一部断面図， 第 4図は割型 方式による従来例の断面図である。 , The figure is a partial cross-sectional view before molding, and FIG. 4 is a cross-sectional view of a conventional example using a split mold method.
明を H施するための最良の形態 以下， この発明の具体的な実施の例を添付図面を参 照して説明する。  BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, specific embodiments of the present invention will be described with reference to the accompanying drawings.
第 1図および第 2図は， ゴムホースが単層の場合と 複層の場合におけるマン ドレルとゴムホースの関係を 示すそれぞれ一部断面図であるが， 蛇腹ゴムホースの 成形用内型となるマ ン ド レル 6 は， 内部に中空部 7を 有しており， この中空部 7 と外部 （外気） とは. 一端 の肉壁中に螻入されたプラグ 8を介して連通自在とな つている。 また， マン ドレル 6の外周において， 両嫱 部に直円筒部 9 , 9が， 中央部に算盤玉を継^足した ような形伏の蛇腹部 10 (連続した螺旋状ではないこと 言っているのであるが， もちろん， 螺旋伏であっても , なんら問題はない） がそれぞれ形成されている。  Figures 1 and 2 are partial cross-sectional views showing the relationship between the mandrel and the rubber hose when the rubber hose has a single layer and a multi-layer, respectively. The barrel 6 has a hollow portion 7 inside, and the hollow portion 7 and the outside (outside air) can be freely communicated via a plug 8 inserted into a wall at one end. In addition, on the outer periphery of the mandrel 6, straight cylindrical portions 9 and 9 are formed on both sides, and a bellows portion 10 (not a continuous spiral shape) shaped like an abacus ball is added to the center. However, of course, there is no problem even if it is spiral spiral).
そして， この蛇腹部 10のう ち， 特に， 谷部個所と， 直円筒部 9 , 9において， 半径方向に多数の小径の孔 11 · · を形成しておき， 前記した中空部 7 と外部とを 空気が連通できるようにしておく 。  A large number of small-diameter holes 11 are formed radially in the bellows portion 10, particularly in the valley portion and the straight cylindrical portions 9, 9, and the hollow portion 7 and the outside are formed. Make sure that air can be communicated.
第 3図は， このよう なマン ドレル 6 に対し， 押し出 し成形した未加硫の直円筒伏のゴムホース 12をその一 鏽側から外挿した状態を示す一部断面図であるが， こ のように外揷したなら， 次に， ゴムホース 12の両端内 側とマン ドレル 6 の直円筒部 9 , 9をシールするので FIG. 3 is a partial cross-sectional view showing a state in which an unvulcanized straight-cylindrical rubber hose 12 extruded and formed from the mandrel 6 is extrapolated from one side thereof. Then, the inside of both ends of the rubber hose 12 and the straight cylindrical parts 9 and 9 of the mandrel 6 are sealed.
Figure imgf000006_0001
ある。
Figure imgf000006_0001
is there.
このシールの方法は， 後記するように， 中空部 7 の 気圧を外部より低圧にすることから， ゴムホース 12が マン ドレル 6に対して全周的に密着勝手になつて格別 の方法を必要としないのであるが， より完全なシール を施そう と思えば， ゴムホース 12の両繡部外周に適宜 なバン ド 13 , 13を巻き付けるものや， 両者 9 , 12の間 に適当なシール材を塗布するものが考えられる。  In this sealing method, as described later, since the pressure in the hollow portion 7 is made lower than the outside pressure, the rubber hose 12 is completely adhered to the mandrel 6 without any special method. However, in order to provide a more complete seal, an appropriate band 13, 13 is wound around the outer circumference of both ends of the rubber hose 12, or an appropriate sealant is applied between the two 9, 12. Can be considered.
以上の操作が完了したなら， これを加硫缶の内部等 に収容し， 所定の温度に加熟するとともに， マ ン ド レ ル 6 の中空部 7 の気圧を外部より も低圧に操作する。  After the above operation is completed, this is placed inside a vulcanizing can, ripened to a predetermined temperature, and the air pressure in the hollow part 7 of the mandrel 6 is adjusted to be lower than that of the outside.
なお， この操作には， 外部を大気圧に設定し， 中空 部 7の空気を真空ポンプ等で抜く もの， あるいは外部 と中空部 7內にそれぞれ正または食の圧力をかけるが , 少なく とも， 中空部 7内の気圧を外部のそれよりは 小さ く設定しておく もの等種々の場合が考えられる。  In this operation, the outside is set to atmospheric pressure and the air in the hollow part 7 is evacuated by a vacuum pump or the like, or positive or eclipse pressure is applied to the outside and the hollow part 7 內, respectively. Various cases are conceivable, such as one in which the air pressure in the part 7 is set smaller than that of the outside.
また， このような操作は， 前記したプラグ 8に， 適 当な空気源に連結されているホースもしく はバイ ブ等 を継げば良いようにしておく。  For such an operation, a hose or a vibe connected to an appropriate air source should be connected to the plug 8 described above.
中空部 7内の空気が外部の気圧より も下がると， 孔 1 1 · ' が存在することから， ゴムホース 12とマ ン ド レ ル 6外周間の気圧も下がり， この圧力差によってゴム ホース 12はマ ン ドレル 6 の蛇腹部 10および直円筒部 9 , 9の形伏に沿うべく成形されるとともに， この間の 加硫操作により， 硬化して安定するのである。 次に， 加硫後， このよ う に成形された蛇腹ゴムホ "" ス 14をマン ド レル 6から抜く ときには， 今度は逆にプ ラグ 8等から空気を入れると， その空気は， 孔 11 · - を通ってマ ン ド レル 6外に出， 蛇腹ゴムホース 14を外 方に膨らませるから， このとき. 一方のシール手段を 緩めて片方へ引けば， 容易に外れることになる。 When the air in the hollow part 7 becomes lower than the outside air pressure, the pressure between the rubber hose 12 and the outer periphery of the mandrel 6 also decreases because the holes 11 1 'are present. It is formed to conform to the contours of the bellows part 10 and the straight cylindrical parts 9, 9 of the mandrel 6, and is cured and stabilized by the vulcanizing operation during this time. Next, after the vulcanization, when the bellows rubber foam "" 14 thus formed is pulled out of the mandrel 6, the air is again injected from the plug 8 or the like, and the air is discharged through the holes 11 ·. Through the mandrel 6 and inflate the bellows rubber hose 14 outward. At this time. Loosen one sealing means and pull it to one side, it will come off easily.
以上により， 製品である蛇腹ゴムホース 14は， その 外周面にパーティ ングライ ンを有しないまつたく の滑 面で構成されるから， 美観の面で優れていることはも ちろんのこと， それに伴う剝離， 裂断， 亀裂といった 事態を生じさせない。  As described above, the bellows rubber hose 14, which is a product, is composed of a matte smooth surface having no parting line on its outer peripheral surface. It does not cause rupture, cracks or other situations.
さらに， 前記した日本特開昭 53 - 126083号公報記載 のものに比べ， 以下の利点が挙げられる。  Furthermore, the following advantages can be obtained as compared with those described in Japanese Patent Application Laid-Open No. 53-126083.
すなわち， 蛇腹のような凹凸の程度が激しいものは , これを縮小してその外型から引き抜こう としても， 一様に縮小しないから， うま く抜けなかったのである が， この発明のように， 內型たるマン ドレル 6の外周 に外嵌させたものであれば， 中空部 7内の気圧を十分 髙く することで， 一様に膨らませることはできるから , これを支障なく抜く ことができるのである。  In other words, a bellows-like thing with a large degree of unevenness could not be pulled out well because even if it was reduced and tried to be pulled out from its outer mold, it did not shrink uniformly, but as in the present invention,內 If the mandrel 6 is fitted around the outer periphery of the mandrel 6, it can be uniformly inflated by sufficiently increasing the air pressure in the hollow portion 7 and can be removed without any trouble. It is.
また， 内型たるマ ン ド レル 6 のみを使用するもので あれば， 外型のみのものに比べてスペースを小さ く で き， 加硫缶等の中に入れるのにも， 多く の個数が入る 上， 加熱する場合も， 熱気を直に当てられるから， 加 熱効果が高い。  In addition, if only the inner mold mandrel 6 is used, the space is smaller than that of the outer mold only, and a large number of pieces can be placed in a vulcanizing can. In addition, the heating effect is high because the hot air can be applied directly when heating.
O PI O PI
WffO ところで， 以上の説明は， 蛇腹ゴムホース 14が単層 で構成されるものであるが， この発明の方法によれば , 複層であっても容易に形成できる。 WffO By the way, in the above description, the bellows rubber hose 14 is constituted by a single layer, but according to the method of the present invention, it can be easily formed even by a multilayer.
すなわち， マン ドレル 6 の外周に外揷するゴムホー ス 12を複層にしておく のみで， 後は同様な操作により , 各層ともマン ドレル 6外周の形状に沿うべく成形さ れるのである。  In other words, only the rubber hose 12 extending to the outer periphery of the mandrel 6 is formed in a multi-layer, and thereafter each layer is formed by the same operation so as to conform to the shape of the outer periphery of the mandrel 6.
これにより， 使用条件等に応じて最適な材質設定等 ができるのである。  As a result, the optimum material setting can be made according to the usage conditions.
例を挙げれば， 燃料タンクの導口部等に使用するも のであれば， 外層を耐熱， 耐候層にし， 内層を耐ガソ リ ン層にするようなこ とが考えられる。  For example, if it is used for fuel tank openings, the outer layer may be a heat and weather resistant layer and the inner layer may be a gasoline resistant layer.
産業上の利用可能性  Industrial applicability
このように外周面にパーティ ングライ ンを有しない ま った く の滑面で構成される蛇腹ゴムホース 14は， 材 質がゴムであること， 蛇腹であって， 可撓性， 振動吸 収性に優れている性質を考慮するなら， あらゆる用途 に適用され得る。  The bellows rubber hose 14, which is made up of a smooth surface having no parting line on the outer peripheral surface, is made of rubber and a bellows, and has flexibility and vibration absorption. It can be applied to any application given its superior properties.
例えば， 前記したように， 自動車のフユエルイ ンレ ッ トのジョ イ ン トホースゃ太陽熱温水器のジョ イ ン ト ホース等の流体の導管として用いるのが最適な例であ ろうが， その他， 各種のカ ップリ ングやダンパー等に 適用しても好適である。  For example, as described above, the most suitable example is to use the joint hose of the fuel inlet of a car or the joint hose of a solar water heater as a fluid conduit. It is also suitable for application to a ring or a damper.
, — — - く小 WIPCT- j , — —-Ku WIPCT- j

Claims

蓄青求 の 範面 The scope of the request
1. 蛇腹ゴムホースにおいて， この蛇腹ゴムホースの 外周を， 成形用の型合わせ構造に起因するバリ部， す なわち， バーティ ングライ ンを有しない， まったく の 滑面で形成したことを特徴とする蛇腹ゴムホース。 1. A bellows rubber hose characterized in that the outer periphery of the bellows rubber hose is formed by a burr portion caused by a molding structure for molding, that is, a completely smooth surface having no vertical line. .
2. 請求の範囲第.1項記載の蛇腹ゴムホースが単層で 構成されることを特徴とする蛇腹ゴムホース。 2. A bellows rubber hose, wherein the bellows rubber hose according to claim 1 is constituted by a single layer.
3. 請求の範囲第 1項記載の蛇腹ゴムホースが複層で 構成されることを特徴とする蛇腹ゴムホース。  3. A bellows rubber hose, wherein the bellows rubber hose according to claim 1 is composed of a plurality of layers.
4. マ ン ド レル （ 6 ) の外周には蛇腹部 （10) を， 內 部には中空部 （ 7 ) をそれぞれ形成する他， 前記マン ド レル （'6 ) の前記蛇腹部 （10) に， 前記中空部 （ 7 ) と外部とを連通する多数の孔 （11 * · ) を穿孔する とともに， 前記マン ド レル （ 6 ) 外周に直円筒状の未 加硫のゴムホース （12) を外嵌し， 加硫条件下， 前記 マ ン ド レル （ 6 ) の中空部 （ 7 ) 内を外部より低圧に することで， 前記ゴムホース （12) を前記マ ン ド レル ( 6 ) の外周形状に沿う蛇腹状に成形することを特徴 とする蛇腹ゴムホースの製造方法。  4. In addition to forming a bellows part (10) on the outer periphery of the mandrel (6) and a hollow part (7) on the lower part, the bellows part (10) of the mandrel ('6) is formed. At the same time, a number of holes (11 *) communicating the hollow portion (7) with the outside are drilled, and a straight cylindrical unvulcanized rubber hose (12) is formed around the outer periphery of the mandrel (6). The rubber hose (12) is formed into the outer peripheral shape of the mandrel (6) by fitting the mandrel (6) under a vulcanization condition so that the pressure in the hollow portion (7) of the mandrel (6) is lower than that of the outside. A method for manufacturing a bellows rubber hose, comprising forming the bellows into a bellows shape.
5. 請求の範囲第 4項記載の孔 （11 · · ) が蛇腹部 （ 10) の谷部の底に穿孔されるものであることを特徴と する蛇腹ゴムホースの製造方法。  5. A method for producing a bellows rubber hose, characterized in that the hole (11 · · ·) according to claim 4 is perforated at the bottom of a valley of the bellows (10).
PCT/JP1984/000464 1984-09-28 1984-09-28 Bellows rubber hose and method of manufacturing the same WO1986002037A1 (en)

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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP1984/000464 WO1986002037A1 (en) 1984-09-28 1984-09-28 Bellows rubber hose and method of manufacturing the same

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5063078A (en) * 1973-10-06 1975-05-29

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5063078A (en) * 1973-10-06 1975-05-29

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