JP2002172677A - Method of manufacturing rubber hose having film intermediate layer - Google Patents

Method of manufacturing rubber hose having film intermediate layer

Info

Publication number
JP2002172677A
JP2002172677A JP2001180732A JP2001180732A JP2002172677A JP 2002172677 A JP2002172677 A JP 2002172677A JP 2001180732 A JP2001180732 A JP 2001180732A JP 2001180732 A JP2001180732 A JP 2001180732A JP 2002172677 A JP2002172677 A JP 2002172677A
Authority
JP
Japan
Prior art keywords
film
rubber
intermediate layer
layer
extrusion
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.)
Withdrawn
Application number
JP2001180732A
Other languages
Japanese (ja)
Inventor
Takafumi Matano
孝文 俣野
Yuji Hirano
祐治 平野
Hiromi Fujii
寛美 藤井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yamashita Rubber Co Ltd
Original Assignee
Yamashita Rubber 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 Yamashita Rubber Co Ltd filed Critical Yamashita Rubber Co Ltd
Priority to JP2001180732A priority Critical patent/JP2002172677A/en
Publication of JP2002172677A publication Critical patent/JP2002172677A/en
Withdrawn legal-status Critical Current

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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B29C48/325—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles being adjustable, i.e. having adjustable exit sections
    • B29C48/327—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles being adjustable, i.e. having adjustable exit sections with centering means
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0021—Combinations of extrusion moulding with other shaping operations combined with joining, lining or laminating
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B29C48/151—Coating hollow articles
    • B29C48/152—Coating hollow articles the inner surfaces thereof
    • B29C48/153—Coating both inner and outer surfaces
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Laminated Bodies (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

PROBLEM TO BE SOLVED: To prevent the possibility that an overlap part opens due to the rigidity or others of a film to be an intermediate layer on the occasion of extrusion or bending in processing after the extrusion when the film satisfying permeation resistance, pressure resistance, etc., is used in simultaneous extrusion of inner- and outer-layer rubber, with the strip-shaped film rounded to make the long-side parts overlap each other, in the extrusion of a liquid or gas transport hose which uses the film of a resin, a metal or others for the intermediate layer for the purpose of improving a permeation performance. SOLUTION: The planar film 5 to be the intermediate layer 2 is sent, being rounded, into an intermediate path 12 formed in an intermediate layer forming part 13 of an extruding head 11. The opposite end parts 8 in the width direction of the film 5 overlap each other and form the overlap part 6, on the occasion, and therefore the part 6 is brought into close contact and integrated by reducing the pressure in the intermediate path 12 by a vacuum pump 17. The inner-layer rubber 3 and the outer-layer rubber 4 are extruded simultaneously inside and outside the film in this state and thereby an unvulcanized or half-vulcanized rubber hose 1 is obtained.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】この発明は液体又は気体輸送
用ホースの製法に係り、特に樹脂製等のフィルムを円筒
状に丸めて曲げ方向両端をオーバーラップさせた中間層
の内外にゴムを押し出し成形する方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a hose for transporting liquid or gas, and particularly to extruding rubber into and out of an intermediate layer in which a film made of resin or the like is rolled into a cylindrical shape and both ends in the bending direction are overlapped. On how to do it.

【従来の技術】液体又は気体輸送用ホースを押し出し成
形するものとして、特開昭６０−１１３８８２号には内
層ゴム、中間層樹脂フィルム、外層ゴムを逐次押し出し
成形するゴムホースが示されている。また、特開平７−
３１４６１０号では、耐透過性に優れたフッ素樹脂フィ
ルムを単層で用い、内外層ゴムと樹脂フィルムを同時押
し出し成形することが記載されている。さらに特開平９
−１６９０６１号には、このような同時押出成形におい
て押出ヘッド内に長尺帯状をなすニットなどの補強繊維
を筒状に丸めながら中間層として送り込みながら内外層
ゴムを同時に押し出し成形することが示されている。2. Description of the Related Art As a method for extruding a hose for transporting liquid or gas, Japanese Patent Application Laid-Open No. Sho 60-113882 discloses a rubber hose for sequentially extruding and forming an inner layer rubber, an intermediate layer resin film and an outer layer rubber. In addition, Japanese Patent Application Laid-Open
No. 314610 describes that a single layer of a fluororesin film having excellent permeation resistance is used, and the inner and outer rubber layers and the resin film are simultaneously extruded. Furthermore, Japanese Patent Application Laid-Open
No. 169,061 discloses that in such a coextrusion molding, the inner and outer layer rubbers are simultaneously extruded while reinforcing fibers such as a long band-shaped knit are fed into the extrusion head as an intermediate layer while being rolled into a cylinder. ing.

【０００２】[0002]

【発明が解決しようとする課題】液体又は気体輸送用ホ
ースにおいて耐透過性を満足させる目的で中間層に樹脂
フィルム等を用いる場合、量産性の点で前記特開平９−
１６９０６１号に示された同時押出成形の採用が最も好
ましい。この場合、耐透過性を有する樹脂製等のフィル
ムを円筒状に丸めて曲げ方向両端をオーバーラップさせ
ながら押出ヘッド内へ送り込み、その内外へゴムを同時
に押し出すことになる。When a resin film or the like is used for an intermediate layer for the purpose of satisfying permeation resistance in a hose for transporting liquid or gas, the above-mentioned Japanese Patent Application Laid-Open No. H9-90904 is considered in terms of mass productivity.
Most preferred is the use of coextrusion as described in US Pat. In this case, a film made of a resin or the like having permeability resistance is rolled into a cylindrical shape, fed into the extrusion head while overlapping both ends in the bending direction, and rubber is simultaneously extruded into and out of the extrusion head.

【０００３】しかしながら、このような成形方法ではオ
ーバーラップ部が存在することによって、仮にこのオー
バーラップ部が開口したまま加硫されると、この開口か
ら内容物である液体又は気体が外部へ透過してしまうこ
とによる耐透過性低下のおそれがあるため、加硫完了ま
での段階で開口が生じないようにオーバーラップ部の密
着度を高くしなければならない。このオーバーラップ部
における開口の出現等によって密着度が低下する原因
は、 剛性の高い高弾性率フィルムを使用することによりそ
の復元弾性で押出直後の軟化した内外ゴム層が変形され
て開口する場合、 加硫のためマンドレルへ装着するときの曲げによるオ
ーバーラップ部のずれ、 オーバーラップ部を密着が不完全のまま溶着すること
によるオーバーラップ部における間隙の発生、等にあ
る。However, in such a molding method, if the vulcanization is performed while the overlap portion is open due to the presence of the overlap portion, a liquid or gas as a content permeates through the opening to the outside. Therefore, it is necessary to increase the degree of adhesion of the overlap portion so that no opening occurs at the stage until vulcanization is completed. The cause of the decrease in the degree of adhesion due to the appearance of openings in the overlap portion is that, when a high-modulus film with high rigidity is used and the softened inner and outer rubber layers immediately after extrusion are deformed and opened due to the restoration elasticity, The overlap portion is displaced due to bending when attached to a mandrel for vulcanization, and a gap is generated in the overlap portion due to welding of the overlap portion with incomplete adhesion.

【０００４】特に、フィルムが硬くて曲がりにくい場合
に上記の問題が生じやすく、フィルムを１００ｍｍ幅、
０．０５ｍｍ厚みの断面積におけるフィルム材料の曲げ
弾性率から換算した上記寸法関係におけるフィルムの曲
げ荷重（以下、単にフィルム曲げ荷重と略称する）が、
従来は４００Ｎ以上とき、フィルムを丸めて端部をオー
バーラップさせた状態で押出成形することやその後のマ
ンドレル装着等の作業が困難であった。[0004] In particular, the above problem is likely to occur when the film is hard and hard to bend.
The bending load of the film in the above dimensional relationship calculated from the bending elastic modulus of the film material at a cross-sectional area of 0.05 mm thickness (hereinafter simply referred to as a film bending load) is:
Conventionally, at 400 N or more, it has been difficult to extrude the film in a state where the film is rolled up and the ends are overlapped, or to attach a mandrel thereafter.

【０００５】したがって柔軟性に優れて薄いフィルムを
採用すればこのような開口のおそれ等が解消されるが、
今度は耐透過性を満足しにくくなり、かつ成形時や高圧
下での使用時におけるフィルムの破れが生じやすくな
る。したがって、フィルムの厚みは耐透過性や耐圧性の
要求を満足させるため一般的に少なくとも０．０５ｍｍ
以上の肉厚が必要となる。[0005] Therefore, if a thin film having excellent flexibility is adopted, such a risk of opening can be eliminated.
This time, it becomes difficult to satisfy the permeation resistance, and the film is likely to be broken during molding or when used under high pressure. Therefore, the thickness of the film is generally at least 0.05 mm in order to satisfy the requirements of permeation resistance and pressure resistance.
The above thickness is required.

【０００６】しかし、このような厚さのフィルムを熱可
塑性樹脂にした場合は、その本来的性質として弾性及び
剛性の性質を強く示すため、フィルムを円筒形に丸めて
中間層とするのが困難になる。また仮に丸めた中間層を
形成できたとしても、未加硫の生ゴムホースの段階でフ
ィルムの弾性に外層ゴムの強度が負けるとオーバーラッ
プ部がフィルムの弾性で開口しやすくなる。さらに加硫
するためマンドレルへ装着する場合は、ホースの内面か
らも応力が働くため、オーバーラップ部が一層開口しや
すくなる。このような現象は金属等の無機フィルムの場
合も同様である。したがって、耐透過性と耐圧性能を満
足するに必要な一定厚みと一定硬さを有するフィルムを
丸めてオーバーラップ部を形成しながら同時押出成形す
る加硫ゴムホースの成形は実際上極めて困難なものとな
る。However, when a film having such a thickness is made of a thermoplastic resin, it is difficult to form the intermediate layer by rolling the film into a cylindrical shape because the film inherently exhibits elasticity and rigidity. become. Even if a rounded intermediate layer can be formed, if the strength of the outer layer rubber is lower than the elasticity of the film at the stage of the unvulcanized raw rubber hose, the overlap portion is easily opened due to the elasticity of the film. Further, when the hose is mounted on a mandrel for vulcanization, stress also acts from the inner surface of the hose, so that the overlap portion is more easily opened. Such a phenomenon is the same in the case of an inorganic film such as a metal. Therefore, it is extremely difficult to form a vulcanized rubber hose that is simultaneously extruded while forming an overlap portion by rolling a film having a certain thickness and a certain hardness required to satisfy the permeation resistance and pressure resistance performance. Become.

【０００７】さらには、フィルムに水分等の揮発性異物
が表面に付着したまま押出成形すると、加硫等の加熱工
程時に揮発分が膨張してしまうため、ゴムとフィルムの
接着時あるいはフィルムのオーバーラップ部を溶着する
ときに発泡現象が生じて製品性能を低下させるおそれが
ある。そこで本願発明はこのような問題点を解決して、
円形に丸めてオーバーラップ部を形成するフィルムを中
間層として同時押出成形を可能にすることを目的とす
る。Furthermore, if the film is extruded while volatile foreign substances such as moisture adhere to the surface, the volatile components expand during the heating step such as vulcanization or the like. When the lap is welded, a foaming phenomenon may occur and the product performance may be reduced. Therefore, the present invention solves such a problem,
It is an object of the present invention to enable co-extrusion molding by using a film which is rounded to form an overlap portion as an intermediate layer.

【０００８】[0008]

【課題を解決するための手段】上記課題を解決するため
本願発明に係るフィルム中間層を有するゴムホースの製
法は、略円筒状をなすフィルム製の中間層内外へ内層ゴ
ムと外層ゴムを押し出してゴムホースを成形する方法に
おいて、帯状のフィルムをその幅方向両側にある一対の
縁部が重なり合わさってオーバーラップ部を形成するよ
う略円筒状に丸めて押出ヘッド内へ供給するとともに、
この押出ヘッド内で前記オーバーラップ部を減圧吸引し
つつこのフィルムの内外へ前記内層ゴムと外層ゴムを押
し出すことを特徴とする。In order to solve the above-mentioned problems, a rubber hose having a film intermediate layer according to the present invention is manufactured by extruding an inner layer rubber and an outer layer rubber into and out of a substantially cylindrical film intermediate layer. In the method of forming a, while feeding a belt-shaped film into a substantially cylindrical shape so that a pair of edges on both sides in the width direction overlap to form an overlap portion,
The inside rubber and the outside rubber are extruded into and out of the film while the overlap portion is suctioned under reduced pressure in the extrusion head.

【０００９】この場合、押出ヘッドに対するフィルムの
供給方法として、押出ヘッドの入り口でフィルムを平面
形状から略円筒状へ丸めながら押出ヘッド内へ供給する
こと（以下、これを押出ヘッド内曲げ処理という）も、
フィルムを予め押出ヘッドの入り口手前側で略円筒状に
付形してから押出ヘッド内へ供給すること（以下、これ
を押出ヘッド外曲げ処理という）もできる。また、フィ
ルムの内外へ内層ゴムと外層ゴムを同時に押し出す工法
や、まず内層ゴムフィルムを積層して押し出し、その後
フィルムの上へと外層ゴムを押し出す工法のいずれも採
用できる。In this case, as a method of supplying the film to the extrusion head, the film is supplied into the extrusion head while being rounded from a planar shape to a substantially cylindrical shape at the entrance of the extrusion head (hereinafter, this is referred to as bending process in the extrusion head). Also,
It is also possible to form the film into a substantially cylindrical shape in front of the entrance of the extrusion head before supplying the film into the extrusion head (hereinafter, this is referred to as a bending process outside the extrusion head). Further, any of a method of simultaneously extruding the inner rubber and the outer rubber into and out of the film, and a method of laminating and extruding the inner rubber film and then extruding the outer rubber onto the film can be adopted.

【００１０】さらに、フィルムを、フィルムを熱可塑性
樹脂もしくは金属等の無機材料又はこれらを組み合わせ
た積層構造で構成することができる。また、フィルム幅
１００ｍｍで厚み０．０５ｍｍのときにおけるフィルム
の曲げ荷重を４００Ｎ以上にすることもできる。Further, the film may be constituted by an inorganic material such as a thermoplastic resin or a metal or a laminated structure obtained by combining these materials. Further, the bending load of the film when the film width is 100 mm and the thickness is 0.05 mm can be 400 N or more.

【００１１】また、前記オーバーラップ部にて重なる一
対の縁部をそれぞれ幅方向の端へ向かって薄くなるよう
に肉厚をテーパー状に形成することもできる。Further, the pair of edges overlapping at the overlap portion may be formed in a tapered shape so as to become thinner toward ends in the width direction.

【００１２】[0012]

【発明の効果】押出成形に際して、円形に丸めたフィル
ムのオーバーラップ部を減圧するため、オーバーラップ
部を密着させることができる。このため、フィルムにオ
ーバーラップ部を形成する押出成形において、押出ヘッ
ド内でオーバーラップ部が開口しないように密着を維持
でき、減圧しなければ開口してしまうような中間層材料
でも同時押出成形可能になる。また、押出成形後の加硫
完了までオーバーラップ部の密着を持続できるので、未
加硫段階の柔らかい生ゴムホース内でもオーバーラップ
部の密着を持続でき、マンドレルへ曲げながら装着する
場合もオーバーラップ部が密着したまま開口しないよう
にでき、かつオーバーラップ部を密着した状態で溶着す
ることによりオーバーラップ部の間隙発生を防止でき
る。According to the present invention, in the extrusion molding, the overlap portion of the film which has been rounded is reduced in pressure, so that the overlap portion can be brought into close contact. For this reason, in extrusion molding that forms an overlap part on the film, it is possible to maintain close contact so that the overlap part does not open in the extrusion head, and it is possible to simultaneously extrude intermediate layer materials that will open unless the pressure is reduced become. In addition, since the adhesion of the overlap portion can be maintained until vulcanization after extrusion molding, the adhesion of the overlap portion can be maintained even in the soft raw rubber hose in the unvulcanized stage, and the overlap portion can be attached even when bending and attaching to the mandrel. Can be prevented from opening while being in close contact with each other, and the gap can be prevented from being formed in the overlap portion by welding the overlap portion in close contact.

【００１３】このため、従来では困難であった、１００
ｍｍ幅、０．０５ｍｍ厚みのフィルム換算時におけるフ
ィルム曲げ荷重が４００Ｎ以上であっても、オーバーラ
ップ部を減圧することによって押出成形並びにその後の
加硫工程まで問題なく作業できるようになった。そのう
えフィルムのオーバーラップ部以外の部分も内外層ゴム
と減圧吸着で密着し、最終的に形状が決まる加硫工程終
了までこの密着を維持できるから、従来では困難であっ
たような薄肉ホースの製造も可能になる。For this reason, 100
Even when the film bending load in terms of a film having a width of 0.05 mm and a thickness of 0.05 mm is 400 N or more, it is possible to work without any problems up to the extrusion molding and the subsequent vulcanization step by reducing the pressure in the overlap portion. In addition, the other parts of the film other than the overlapped part adhere to the inner and outer layer rubber by vacuum adsorption, and this adhesion can be maintained until the end of the vulcanization process, which finally determines the shape, so manufacturing thin-walled hoses that was difficult in the past Also becomes possible.

【００１４】したがって、耐熱・耐圧の補強性あるいは
耐透過性向上の要求を満足させる厚さのフィルムを使用
できる量産性に優れた方法を実現できる。特に従来では
成形不可能であったような高弾性率のフィルムを使用で
き、かつフィルムの材質として樹脂及び無機材料のいず
れも使用できるから目的性能に応じて自由に選択できる
ようになる。Therefore, it is possible to realize a method excellent in mass productivity in which a film having a thickness satisfying the requirements for reinforcement of heat resistance and pressure resistance or improvement in permeation resistance can be used. In particular, a film having a high modulus of elasticity, which cannot be conventionally formed, can be used, and both a resin and an inorganic material can be used as the material of the film, so that the film can be freely selected according to the intended performance.

【００１５】このとき、平面状のフィルムを押出ヘッド
内曲げ処理すれば押出成形を高効率化できる。またフィ
ルムを押出ヘッド外曲げ処理により予め円筒形状に付形
すれば、押出ヘッド内曲げ処理する場合よりも加工が容
易になり、より高剛性のフィルム使用が可能になる。At this time, if the flat film is bent in the extrusion head, the extrusion can be made more efficient. Further, if the film is formed into a cylindrical shape in advance by bending the film outside the extrusion head, the processing becomes easier than in the case where the film is bent inside the extrusion head, and a film having higher rigidity can be used.

【００１６】さらに、オーバーラップ部にて重なる一対
の縁部をそれぞれ端へ向かって薄くなるように肉厚をテ
ーパー状に形成すると、オーバーラップ部に段差が解消
又は少なくなるので、ゴムホースを相手部材へ取付けて
バネクリップで固定したとき締め付け力が均一になり、
シール性を向上し、抜けにくくなるように確実な固定が
可能になる。しかも、縁部の肉厚をテーパー状にして薄
肉にしても減圧により密着を維持できる。Further, when a pair of edges overlapping each other at the overlap portion is formed in a tapered shape so as to become thinner toward each end, the step at the overlap portion is eliminated or reduced, so that the rubber hose is connected to the mating member. When tightened with a spring clip, the tightening force becomes uniform,
The sealing performance is improved, and reliable fixing can be performed so as to be difficult to remove. In addition, even when the thickness of the edge portion is tapered, the adhesion can be maintained by reducing the pressure.

【００１７】[0017]

【発明の実施の形態】以下、図面に基づいて実施例を説
明する。図１は成形装置全体を概略的に示す図、図２は
同時押し出し成形時のフィルムの変化を示す図である。
図１及び図２に示すように、本実施例のゴムホース１
は、樹脂又は金属等の無機フィルムからなる中間層２の
内側にゴム等の適宜弾性材料からなる内層ゴム３、外側
に外層ゴム４を備え、これらを同時押し出し成形して得
られたものである。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram schematically showing the entire molding apparatus, and FIG. 2 is a diagram showing a change in a film during simultaneous extrusion molding.
As shown in FIGS. 1 and 2, the rubber hose 1 of the present embodiment
Is obtained by simultaneously extruding and forming an inner rubber layer 3 made of a suitable elastic material such as rubber inside an intermediate layer 2 made of an inorganic film such as resin or metal, and an outer rubber layer 4 outside. .

【００１８】中間層２を構成するフィルム５は円筒形に
丸められて一部にオーバーラップ部６を有する。このオ
ーバーラップ部６ではフィルム５の長辺部（長手方向と
直交する幅方向における両端部）８、８が所定幅で上下
に重なっている。なお、フィルム５と中間層２は同じも
のであるが、押し出し成形前の部分について特にフィル
ム５と称する。The film 5 constituting the intermediate layer 2 is rounded into a cylindrical shape and has an overlap portion 6 in part. In the overlap portion 6, the long sides (both ends in the width direction orthogonal to the longitudinal direction) 8, 8 of the film 5 are vertically overlapped with a predetermined width. Although the film 5 and the intermediate layer 2 are the same, the part before the extrusion molding is particularly referred to as the film 5.

【００１９】このゴムホースの押出ヘッド内曲げ処理に
よる成形方法の原理を図１により説明する。まず、原反
ロール９から帯状のフィルム５を押出成形機１０へ連続
的に供給し、このフィルム５を丸めて筒状にしながら押
出ヘッド１１の中間通路１２へ供給する。中間通路１２
はフィルム５を供給するための通路であり、押出ヘッド
１１の一部である中間層形成部１３に設けられる。中間
層形成部１３の内側に内層用の内側通路１４が設けら
れ、かつ外側に外層用の外側通路１５が設けられ、それ
ぞれに内外層をなすための原料ゴムが供給される。これ
ら３通路は集合通路１６の入り口近傍になる合流部１６
ａで合流し、集合通路１６を通り３層が一体化したゴム
ホース１としてが押し出される。The principle of the method of forming the rubber hose by bending inside the extrusion head will be described with reference to FIG. First, the belt-shaped film 5 is continuously supplied from the raw material roll 9 to the extruder 10, and is supplied to the intermediate passage 12 of the extrusion head 11 while the film 5 is rounded and formed into a cylindrical shape. Intermediate passage 12
Is a passage for supplying the film 5 and is provided in the intermediate layer forming portion 13 which is a part of the extrusion head 11. An inner passage 14 for the inner layer is provided inside the intermediate layer forming portion 13, and an outer passage 15 for the outer layer is provided outside the intermediate layer forming portion 13. Raw rubber for forming the inner and outer layers is supplied to each. These three passages are joined at a junction 16 near the entrance of the collective passage 16.
The rubber hose 1 merges at a and passes through the collecting passage 16 to be extruded as the rubber hose 1 in which the three layers are integrated.

【００２０】中間通路１２内は、減圧装置である真空ポ
ンプ１７へ接続することにより大気圧よりも低い所定の
減圧度まで減圧されており、この減圧は中間通路１２を
通して集合通路１６まで及んでいる。したがって、内外
層３，４は中間層２に対して密着度を高くして積層一体
化される。なお、図には便宜的に真空ポンプ１７を２個
表示するが、実際の中間通路１２はリング状をなす単一
のものであり、これに真空ポンプ１７を一つ接続するこ
とになる。The inside of the intermediate passage 12 is connected to a vacuum pump 17 which is a pressure reducing device, so that the pressure is reduced to a predetermined degree of pressure lower than the atmospheric pressure. This reduced pressure reaches the collecting passage 16 through the intermediate passage 12. . Therefore, the inner and outer layers 3 and 4 are laminated and integrated with a high degree of adhesion to the intermediate layer 2. Although two vacuum pumps 17 are shown in the figure for convenience, the actual intermediate passage 12 is a single ring-shaped one, and one vacuum pump 17 is connected thereto.

【００２１】この押し出し成形された直後の状態におけ
るゴムホース１は未加硫又は半加硫の生ゴムホースであ
ってその後加硫される。すなわちこの押し出された生ゴ
ムホースを所定寸法にカットし、図６に示すような、例
えば３次元方向等へ複雑に曲がった曲線状のマンドレル
１８に装着して加硫温度に所定時間加熱することにより
加硫し、３次元方向等の種々な曲線状をなす完成された
製品ゴムホース１となる。The rubber hose 1 immediately after the extrusion molding is an unvulcanized or semi-vulcanized raw rubber hose, which is thereafter vulcanized. That is, the extruded raw rubber hose is cut into a predetermined size, and is mounted on a curved mandrel 18 which is complicatedly bent in, for example, a three-dimensional direction as shown in FIG. 6 and heated to a vulcanization temperature for a predetermined time. It is vulcanized to provide a finished product rubber hose 1 having various curved shapes such as three-dimensional directions.

【００２２】図５は押出ヘッド１１の一具体例を示す断
面図である。この図に明らかなように、押出ヘッド１１
の前端部には、コア２０と、その周囲を囲むダイス２１
が設けられる。コア２０の外周とダイス２１の内周との
間にゴムホース１を送り出すための環状スリット２２が
形成される。環状スリット２２はコア２０の外周及びダ
イス２１の内周と同心である。FIG. 5 is a sectional view showing a specific example of the extrusion head 11. As shown in FIG. As can be seen in this figure, the extrusion head 11
At the front end of the core, a core 20 and a die 21 surrounding the core 20 are provided.
Is provided. An annular slit 22 for sending out the rubber hose 1 is formed between the outer periphery of the core 20 and the inner periphery of the die 21. The annular slit 22 is concentric with the outer periphery of the core 20 and the inner periphery of the die 21.

【００２３】コア２０の外周面とダイス２１の内周面に
は、それぞれ押し出し軸線Ｃと平行な直線断面部２３、
２４が形成され、かつそれぞれの後部は押し出し方向Ａ
に対して、外方へ拡開するように傾斜する上がり斜面２
５と、内方へ傾斜する下がり斜面２６とへ連続してい
る。The outer peripheral surface of the core 20 and the inner peripheral surface of the die 21 have a straight section 23 parallel to the extrusion axis C, respectively.
24 are formed, and each rear portion is in the extrusion direction A
Upward slope 2 that inclines so as to expand outward
5 and a downward slope 26 that slopes inward.

【００２４】上がり斜面２５と下がり斜面２６の間に形
成された後方へ拡開する空間内には、先端が先細りのテ
ーパー状をなす略円筒状の外側円筒部２７とその内側に
同心状に配置された先端が拡開方向にテーパー状をなす
内側円筒部２８が設けられている。これら外側円筒部２
７と内側円筒部２８によって中間層形成部１３が構成さ
れる。外側円筒部２７は外周斜面３０と内周斜面３１を
有し、外周斜面３０は下がり斜面２６と間隔を持って対
面し、押し出し方向Ａに対して先端が先細りのテーパー
状をなす外側通路１５を形成する。A substantially cylindrical outer cylindrical portion 27 having a tapered tip and a concentrically disposed inside thereof are provided in a rearwardly expanding space formed between the upward slope 25 and the downward slope 26. An inner cylindrical portion 28 having a formed tip tapered in the expanding direction is provided. These outer cylindrical parts 2
The intermediate layer forming portion 13 is constituted by the inner cylindrical portion 28 and the inner cylindrical portion 28. The outer cylindrical portion 27 has an outer slope 30 and an inner slope 31, and the outer slope 30 faces the down slope 26 with an interval therebetween, and has a tapered outer passage 15 having a tapered tip in the extrusion direction A. Form.

【００２５】内側円筒部２８は直線状断面の外周面３２
と内周斜面３３を備え、外周面３２は外側円筒部２７の
内周斜面３１との間に押し出し方向Ａに対して先端が先
細りのテーパー状をなす中間通路１２を形成し、内周斜
面３３は上がり斜面２５と間隔を持って対面し、押し出
し方向Ａに対して先端が先細りのテーパー状をなす内側
通路１４を形成する。The inner cylindrical portion 28 has an outer peripheral surface 32 having a linear cross section.
The outer peripheral surface 32 forms a tapered intermediate passage 12 with the inner peripheral inclined surface 31 of the outer cylindrical portion 27 in the extrusion direction A. Faces the rising slope 25 at an interval, and forms an inner passage 14 having a tapered tip in the extrusion direction A.

【００２６】図中における符号３４はバックジョイント
であり、内側通路１４の一部をなすとともに、外側円筒
部２７と内側円筒部２８を同心的に保持し、かつ軸芯部
ロッド３５を介してコア２０を支持している。３６はダ
イス２１を支持するケースである。Reference numeral 34 in the drawing denotes a back joint, which forms a part of the inner passage 14, concentrically holds the outer cylindrical portion 27 and the inner cylindrical portion 28, and has a core Supports 20. A case 36 supports the die 21.

【００２７】次に、ゴムホース１及びその構成各部につ
いて詳細に説明する。ゴムホース１は、中間層２、内層
ゴム３及び外層ゴム４の各肉厚を加えた合計肉厚が、
５．０ｍｍ程度であるが、１．５〜３．５ｍｍの程度の
従来と比べて極めて肉薄ホースにすることもできる。本
願明において薄肉ホースとはこの肉厚範囲のホースのこ
とをいうものとする。また、中間層２の総厚みは０．０
１ｍｍから１．００ｍｍの範囲内にすることが好まし
い。Next, the rubber hose 1 and its components will be described in detail. The rubber hose 1 has a total thickness obtained by adding the respective thicknesses of the intermediate layer 2, the inner layer rubber 3, and the outer layer rubber 4,
Although it is about 5.0 mm, the hose can be made extremely thin compared to the conventional one of about 1.5 to 3.5 mm. In the present application, a thin-walled hose refers to a hose in this thickness range. The total thickness of the intermediate layer 2 is 0.0
It is preferable that the distance be in the range of 1 mm to 1.00 mm.

【００２８】中間層２を構成するフィルム５は、耐透過
性に優れる熱可塑性樹脂あるいは金属等の無機フィルム
からなり、フィルム曲げ荷重（１００ｍｍ幅、０．０５
ｍｍ厚み時）は、４００Ｎ以上のものを使用する。樹脂
フィルムの場合は、融点が５０℃以上３００℃以下の熱
可塑性樹脂製フィルムが好ましく、例えば、ＴＨＶ５０
０及びＴＨＶ６１０Ｇ（住友スリーエム（株）の商品
名；三元フッ素系樹脂）、もしくはナイロン１２を用い
る。The film 5 constituting the intermediate layer 2 is made of an inorganic film such as a thermoplastic resin or a metal having excellent permeation resistance, and has a film bending load (100 mm width, 0.05 mm).
(at the time of mm thickness), 400N or more is used. In the case of a resin film, a thermoplastic resin film having a melting point of 50 ° C. or more and 300 ° C. or less is preferable.
0 and THV610G (trade name of Sumitomo 3M Limited; ternary fluororesin) or nylon 12.

【００２９】このような、樹脂フィルム材料としては、
ＬＤＰＥ、ＬＬＤＰＥ、ＨＤＰＥ、ＰＰ、ＰＥＴ、ＰＢ
Ｔ、ＰＡ６、ＰＡ６６、ＰＡ１１、ＰＡ１２、ＰＰＳ、
ＰＶＤＣ、ＰＶＣ、ＰＶＡ、エチレンビニルアルコール
共重合体、フッ素樹脂（単一重合体、二元系重合体、三
元系重合体）等の樹脂を強度、耐圧性、耐透過性、融
点、耐熱性、耐柔軟性、価格等から用途に合わせて選択
する。フィルムの製法はインフレーションフィルム成形
とＴダイ成形のどちらでも良く、両成形法とも多層押出
が可能であり、別個に押し出したフィルムを後工程で張
り合わせて成形することも可能である。As such a resin film material,
LDPE, LLDPE, HDPE, PP, PET, PB
T, PA6, PA66, PA11, PA12, PPS,
Resin such as PVDC, PVC, PVA, ethylene vinyl alcohol copolymer, fluororesin (homopolymer, binary polymer, terpolymer), strength, pressure resistance, permeability resistance, melting point, heat resistance, Select according to the application from flexibility and price. The method of producing the film may be either blown film molding or T-die molding, and both molding methods are capable of multilayer extrusion, and separately extruded films can be laminated and formed in a later step.

【００３０】多層樹脂フィルムは、２層から最大５層の
多層構造として、少なくとも最内層又は最外層の樹脂フ
ィルムの融点をホースの加硫温度より低くすれば、加硫
工程でフィルムのオーバーラップ部を加硫と同時融着す
ることが可能である。オーバーラップ部分を融着すれば
未融着状態のホースよりも耐圧性と耐透過性が向上す
る。加硫工程の前後に加熱工程を設けてフィルムの溶着
を行うことも可能であり、ゴム材料の加硫温度と樹脂層
の融点が大きくかけ離れている場合には有効である。The multilayer resin film has a multilayer structure of two to a maximum of five layers, and if at least the melting point of the resin film of the innermost layer or the outermost layer is lower than the vulcanization temperature of the hose, the overlapping portion of the film in the vulcanization step. Can be simultaneously fused with vulcanization. When the overlapped portion is fused, the pressure resistance and the permeation resistance are improved as compared with the unfused hose. It is also possible to provide a heating step before and after the vulcanization step to weld the film, and this is effective when the vulcanization temperature of the rubber material and the melting point of the resin layer are far apart.

【００３１】また、耐透過性に優れるが低融点の樹脂を
使用するときは両面に耐熱性に優れた樹脂を張り合わせ
ることで低融点樹脂も適用が可能となる。上記のように
多層化すれば、異なる樹脂間で特性を補い合うことがで
きるのみならず、フィルムの製造工程で生じるピンホー
ルの発生も多層構造になるほど可能性が小さくなる。ま
た、フィルムの総厚みを単層フィルムと同等性能でより
薄肉化することも可能である。When a resin having excellent permeation resistance but having a low melting point is used, a resin having excellent heat resistance can be applied to both surfaces, so that a low melting point resin can be used. With the multilayer structure as described above, not only can the characteristics be compensated between different resins, but also the possibility of occurrence of pinholes generated in the film manufacturing process decreases as the multilayer structure increases. It is also possible to make the total thickness of the film thinner with the same performance as a single-layer film.

【００３２】フィルム５に用いる金属等の無機フィルム
は、軽量で薄肉化が容易なアルミニウムが好ましく、ア
ルミニウム単層、あるいは上記樹脂単層又は複層フィル
ムとアルミニウム箔の積層体、さらには上記樹脂単層又
は積層フィルムにアルミニウム蒸着した構成が望まし
い。アルミニウム蒸着に近い積層体として、上記樹脂単
層又は積層フィルムにシリカや酸化アルミナ等のセラミ
ック等の無機材料を蒸着もしくは張り合わせたフィルム
も使用できる。このようなフィルムを使用すれば、内容
液あるいは内容気体の完全不透過化が可能になる。The inorganic film such as a metal used for the film 5 is preferably aluminum which is lightweight and easily thinned, and is a single layer of aluminum or a laminate of the above-mentioned resin single layer or multilayer film and an aluminum foil, and furthermore, the above-mentioned resin single layer. A configuration in which aluminum is deposited on a layer or a laminated film is desirable. As a laminate close to aluminum vapor deposition, a film in which an inorganic material such as a ceramic such as silica or alumina oxide is vapor-deposited or laminated on the above resin single layer or laminated film can also be used. Use of such a film makes it possible to completely impregnate the content liquid or content gas.

【００３３】熱可塑性樹脂フィルムは製造工程で縦横に
延伸配向されているが、クリープ特性があるため、長期
に渡り応力負荷が続くと変形が生じやすい。配向を強く
すれば配向方向の抗張力が増すが、反対に耐引き裂き性
や耐ピンホール性が低下する。そのため中間フィルム層
には一定上の厚みの剛性に優れた樹脂フィルム層を用い
る必要がある。Although the thermoplastic resin film is stretched and oriented in the vertical and horizontal directions in the manufacturing process, it has a creep property, and therefore is liable to be deformed when a stress load is continued for a long period of time. When the orientation is increased, the tensile strength in the orientation direction increases, but on the contrary, the tear resistance and the pinhole resistance decrease. Therefore, it is necessary to use a resin film layer having a certain thickness and excellent rigidity for the intermediate film layer.

【００３４】内層ゴム層３及び外層ゴム層５をなすゴム
材料は、ＮＢＲ、ＳＢＲ、ＦＫＭ、ＢＲ、ＣＲ、ＩＩ
Ｒ、ＣＳＭ、ＥＣＯ、ＥＰＤＭ、シリコンゴムなどを耐
透過性、強度、耐熱性、耐候性、耐薬品性、耐油性、耐
寒性、硬度、比重、価格等から要求特性に基づいて選択
し、内外層を同材料あるいは別材料を組み合わせて最大
３層構造で製造することができる。The rubber material forming the inner rubber layer 3 and the outer rubber layer 5 is NBR, SBR, FKM, BR, CR, II
R, CSM, ECO, EPDM, silicone rubber, etc. are selected based on required characteristics from permeation resistance, strength, heat resistance, weather resistance, chemical resistance, oil resistance, cold resistance, hardness, specific gravity, price, etc. The layers can be manufactured in a maximum of three layers by combining the same material or different materials.

【００３５】次に、上記各材料からなるホースの製法を
より詳細に説明する。図２は各実施例における同時押し
出し成形を模式的に説明するための図であり、便宜的に
押出ヘッド１１のうち中間層形成部１３を分離して示
す。この図において平面状かつ長尺帯状に形成されたフ
ィルム５は送り方向Ａに沿って中間層形成部１３へ連続
的に送り込まれる。このときフィルム５は、中間層形成
部１３内へ送られる過程で、当初の平面形状Ｂから、円
錐形状Ｃ及び円筒形状Ｄへと次第に形状を変化する。Next, a method of manufacturing a hose made of each of the above materials will be described in more detail. FIG. 2 is a diagram for schematically explaining the simultaneous extrusion molding in each of the examples. For convenience, the intermediate layer forming portion 13 of the extrusion head 11 is shown separately. In this figure, the film 5 formed in a flat and long strip shape is continuously fed into the intermediate layer forming section 13 along the feeding direction A. At this time, the film 5 gradually changes its shape from the initial planar shape B to a conical shape C and a cylindrical shape D in the process of being fed into the intermediate layer forming portion 13.

【００３６】すなわち、送り方向（押し出し方向）Ａに
対して左右の長辺部８，８は、中間層形成部１３内で重
ね合わされてオーバーラップ部６をなすとともにフィル
ム５は円形断面に丸められた円筒形状Ｄをなすが、中間
層形成部１３の入り口近くでは、平面形状Ｂから円筒形
状Ｄに移行する中間形態として円錐形状部Ｃをなす。こ
の円錐形状部Ｃではフィルム５の両長辺部８，８が互い
に接近する方向へ曲げ始められて徐々にオーバーラップ
部６を形成する。That is, the long sides 8, 8 on the left and right sides in the feed direction (extrusion direction) A are overlapped in the intermediate layer forming section 13 to form an overlap section 6, and the film 5 is rounded into a circular cross section. A cylindrical shape D is formed, but near the entrance of the intermediate layer forming portion 13, a conical portion C is formed as an intermediate shape in which a transition from the planar shape B to the cylindrical shape D is made. In this conical portion C, both long side portions 8, 8 of the film 5 are started to bend in a direction approaching each other to gradually form an overlap portion 6.

【００３７】このようにしてフィルム５が中間層形成部
１１内で円筒形状Ｄをなすと、押出ヘッド１１にてその
内外へ内層ゴム３と外層ゴム４の各ゴムが押し出され、
これら３層が一体化した中空状のゴムホース１が同時押
し出し成形されて押出ヘッド１１から押し出される。When the film 5 has a cylindrical shape D in the intermediate layer forming section 11 in this way, the rubbers of the inner rubber 3 and the outer rubber 4 are extruded into and out of the extrusion head 11,
The hollow rubber hose 1 in which these three layers are integrated is simultaneously extruded and extruded from the extrusion head 11.

【００３８】図３は図１の合流部１６ａ近傍におけるオ
ーバーラップ部６部分について説明するための拡大断面
図であり、図４は中間層形成部１３内における中間層２
の状態を示すための図１における４−４線相当断面図で
ある。これらの図に示すように、中間層形成部１３は合
流部１６ａに向かって先細りとなるテーパー状に形成さ
れ、合流部１６ａに臨む中間通路１２の出口側における
開口幅はオーバーラップ６の厚さ程度になっている。FIG. 3 is an enlarged cross-sectional view for explaining the overlapping portion 6 near the merging portion 16a in FIG. 1. FIG. 4 is an enlarged sectional view of the intermediate layer 2 in the intermediate layer forming portion 13.
FIG. 4 is a sectional view taken along line 4-4 in FIG. 1 to show the state of FIG. As shown in these drawings, the intermediate layer forming portion 13 is formed in a tapered shape that tapers toward the junction 16 a, and the opening width of the intermediate passage 12 facing the junction 16 a at the outlet side is the thickness of the overlap 6. It is about.

【００３９】このため、中間通路１２の出口側ではオー
バーラップ部６を構成する上下のフィルム５、５は中間
層形成部１３によって密接される。しかも中間通路１２
内が図３の白抜き矢示で減圧方向を模式的に示すように
減圧されているため、オーバーラップ部６において上下
のフィルム５、５間も減圧されてそれぞれが強く密着さ
れ、オーバーラップ部６における揮発分等の異物が吸引
除去され、その後の加硫工程における加熱時に揮発分が
膨張して発泡する現象の発生を防止できる。For this reason, the upper and lower films 5, 5 constituting the overlap portion 6 are brought into close contact with the intermediate layer forming portion 13 on the outlet side of the intermediate passage 12. Moreover, the intermediate passage 12
Since the inside is decompressed as schematically indicated by the outline arrow in FIG. 3, the pressure is also reduced between the upper and lower films 5 in the overlap portion 6, and the films 5 and 5 are strongly adhered to each other. Foreign substances such as volatile matter in 6 are removed by suction, and the phenomenon that the volatile matter expands and foams during heating in the subsequent vulcanization step can be prevented from occurring.

【００４０】また、図４に示すように、フィルム５のう
ちオーバーラップ部６以外の部分は中間通路１２の出口
側部分との間に若干の間隙１９を形成するので、この間
隙１９を通して中間通路１２へ接続する真空ポンプ１７
により、図３に示す合流部１６ａまでを同時に減圧でき
る。As shown in FIG. 4, the portion of the film 5 other than the overlap portion 6 forms a slight gap 19 between the film 5 and the outlet side portion of the intermediate passage 12, so that the intermediate passage 12 passes through the gap 19. Vacuum pump 17 connected to 12
Thereby, the pressure can be reduced to the junction 16a shown in FIG. 3 at the same time.

【００４１】したがって、フィルム５はオーバーラップ
部６において上下のフィルム５，５部分が減圧密着され
た状態のまま合流部１６ａへ送られ、ここで内層ゴム３
と外層ゴム４が一体化されるので、オーバーラップ部６
を密着させておけないような硬いフィルム５であって
も、確実に密着させて同時押出成形できる。しかも、押
出ヘッド内曲げ処理を可能にするため、高効率で量産で
きる。Therefore, the film 5 is sent to the junction 16a while the upper and lower films 5, 5 are kept in close contact with each other under reduced pressure in the overlap portion 6, where the inner rubber 3
And the outer layer rubber 4 are integrated, so that the overlapping portion 6
Can be co-extruded even if the film 5 is so hard that it cannot be adhered. In addition, since the inside of the extrusion head can be bent, mass production can be performed with high efficiency.

【００４２】このとき、図３に明らかなように合流部１
６ａまで高真空を保たれるため、空気などのガスや揮発
分等の異物を除去でき、中間層２に対して内層ゴム３及
び外層ゴム４を高い密着度で一体化でき、その後の加硫
工程における加熱時に揮発分が膨張して発泡する現象の
発生を防止できる。しかも、合流部１６ａまで高真空に
保たれることにより、外層ゴム４と内層ゴム３も互いに
接近する方向へ力を受けるから、より強力に一体化する
ことができる。At this time, as is apparent from FIG.
Since a high vacuum is maintained up to 6a, foreign substances such as gas and volatile matter such as air can be removed, and the inner rubber layer 3 and the outer rubber layer 4 can be integrated with the intermediate layer 2 with a high degree of adhesion. It is possible to prevent the occurrence of a phenomenon in which volatile components expand and foam during heating in the process. In addition, since the outer layer rubber 4 and the inner layer rubber 3 receive a force in a direction approaching each other when the high vacuum is maintained up to the junction 16a, they can be integrated more strongly.

【００４３】このように押出成形された生ゴムホース
は、冷却後に必要長さにカットされ、加硫できるまで保
管され、オーバーラップ部６並びにオーバーラップ部６
以外の中間層２と内層ゴム３及び外層ゴム４の間にはそ
れぞれ押出時に減圧されたまま密着を維持する。また、
カット後のホース端面は何も処理を施してないが、内外
層のゴムがフィルム接触面に面圧を加えているため、大
気あるいは水分がフィルムのオーバーラップに入り込む
現象は起こらず、生ゴムホースの保管中もオーバーラッ
プ部の密着状態が維持される。The thus-extruded raw rubber hose is cut to a required length after cooling, stored until it can be vulcanized, and the overlap portion 6 and the overlap portion 6 are cured.
The intermediate layer 2 and the inner layer rubber 3 and the outer layer rubber 4 other than the other layers maintain close contact with each other while being depressurized at the time of extrusion. Also,
No treatment is applied to the hose end surface after cutting, but since the rubber of the inner and outer layers applies surface pressure to the film contact surface, the phenomenon that air or moisture enters the film overlap does not occur, and the raw rubber hose Even during storage, the close contact state of the overlap portion is maintained.

【００４４】その後、加硫のため図６に示すように、マ
ンドレル１８へ曲げながら装着しても、オーバーラップ
部６は加硫完了まで減圧による密着を維持するため、重
なり合った部分の当接面間でずれを生じたり開口するこ
とを阻止できるようになる。また、装着後の加硫により
オーバーラップ部６が加硫温度で融着するとき、密着を
維持しているのでオーバーラップ部６に間隙が生じず、
オーバーラップ部６はそれ以後完全に一体化するので、
耐透過性や耐圧性を良好に維持できる。After that, as shown in FIG. 6, even when the mandrel 18 is bent while being mounted for vulcanization, the overlapping portion 6 maintains the close contact by decompression until the vulcanization is completed. It is possible to prevent a gap or opening from occurring between them. Further, when the overlap portion 6 is fused at the vulcanization temperature by vulcanization after mounting, no gap is generated in the overlap portion 6 because the close contact is maintained,
Since the overlap part 6 is completely integrated thereafter,
Good permeation resistance and pressure resistance can be maintained.

【００４５】したがって、燃料ホースなどのように所定
の高い耐透過性や耐圧性等の要求を満たすことのできる
硬いフィルムを使用して同時押出成形から、耐透過性や
耐圧性等を満足できると同時に量産性に優れた方法にな
る。Therefore, it is considered that the permeation resistance, pressure resistance, etc. can be satisfied from co-extrusion molding using a hard film, such as a fuel hose, which can satisfy predetermined high permeation resistance, pressure resistance, etc. At the same time, the method is excellent in mass productivity.

【００４６】表１はフィルム曲げ弾性率と押出成形〜加
硫までの工程におけるオーバーラップ部の状態との関係
を示し、開口しなかったものを○、開口したものを×で
示したものである。また、比較例１は減圧せずに押出ヘ
ッド内曲げ処理をした場合、実施例１は大気圧−９８６
５８ＰＡ（大気圧−７４０ｍｍＨｇ）まで減圧した同じ
く押出ヘッド内曲げ処理をした例である。この表から明
らかなように、比較例１ではフィルム曲げ弾性率が４０
０Ｎ以上の場合は結果が不適（×）であるが、実施例１
では、５０００Ｎ以上１００００Ｎ未満までの加工が可
能になり、それだけ高弾性率すなわち弾力や剛性が強
く、高い耐透過性や耐圧性等を達成できる硬いフィルム
を使用できることになる。Table 1 shows the relationship between the film flexural modulus and the state of the overlapped portion in the steps from extrusion to vulcanization. . Further, in Comparative Example 1, when the inside of the extrusion head was subjected to the bending treatment without reducing the pressure, Example 1 was in the atmospheric pressure of -986.
This is an example in which the inside of the extrusion head is subjected to the same bending treatment in which the pressure is reduced to 58 PA (atmospheric pressure-740 mmHg). As is clear from this table, in Comparative Example 1, the film flexural modulus was 40%.
In the case of 0N or more, the result is unsuitable (x).
In this case, processing from 5,000 N to less than 10,000 N becomes possible, so that a hard film that has a high elastic modulus, that is, a high elasticity and rigidity, and that can achieve high permeation resistance, pressure resistance, and the like can be used.

【００４７】また、成形終了までオーバーラップ部６並
びにオーバーラップ部６以外の中間層２と内層ゴム３及
び外層ゴム４の間にはそれぞれ押出時に減圧されたまま
密着を維持するので、これまで困難であったような薄肉
ホースの製造が可能になる。例えば、フィルム５の厚み
を０．２ｍｍのとき、内層ゴム３の厚みを０．８ｍｍ、
外層ゴム４の厚みを１．０ｍｍとし、全体の肉厚を２．
０ｍｍの薄肉ホースとすることができる。なお、中間層
２の総厚みに対して 内層ゴム３、中間層２及び外層ゴ
ム４の総厚みを３倍〜５００倍程度にすることができ、
薄肉ホースを得る目的からは２０倍程度にすることが好
ましい。Further, until the molding is completed, the close contact between the overlap portion 6 and the intermediate layer 2 other than the overlap portion 6 and between the inner rubber layer 3 and the outer rubber layer 4 is maintained while the pressure is reduced during extrusion. It is possible to manufacture a thin-walled hose. For example, when the thickness of the film 5 is 0.2 mm, the thickness of the inner rubber layer 3 is 0.8 mm,
The thickness of the outer layer rubber 4 was set to 1.0 mm, and the overall thickness was set to 2.
It can be a thin-walled hose of 0 mm. In addition, the total thickness of the inner rubber layer 3, the intermediate layer 2, and the outer rubber layer 4 can be about 3 to 500 times the total thickness of the intermediate layer 2,
For the purpose of obtaining a thin-walled hose, it is preferable to make it about 20 times.

【００４８】なお、本願発明は上記の各実施例に限定さ
れるものではなく、発明の原理内において種々に変形や
応用が可能である。例えば、押出ヘッド１１の手前でフ
ィルム５を予め幅方向に曲げるよう押出ヘッド以外の別
手段で付形する押出ヘッド外曲げ処理を採用することも
できる。但し、この処理でも、押出ヘッド１１内におい
てはオーバーラップ部６を減圧して密着させることは同
じである。It should be noted that the present invention is not limited to the above embodiments, and various modifications and applications are possible within the principle of the present invention. For example, an extruding head outside bending process in which the film 5 is previously bent in the width direction before the extruding head 11 by another means other than the extruding head can be adopted. However, even in this process, the pressure of the overlap portion 6 is reduced and brought into close contact in the extrusion head 11.

【００４９】このようにすると、さらに高弾性率フィル
ムを使用することが可能になる。すなわち、表１におけ
る実施例２はこのような押出ヘッド外曲げ処理を採用
し、かつ大気圧−９８６５８ＰＡ（大気圧−７４０ｍｍ
Ｈｇ）まで減圧した例である。この表から明らかなよう
に、２００００Ｎまでの加工が可能になり、それだけ高
弾性率フィルムを使用できることになる。This makes it possible to use a film having a higher elastic modulus. That is, Example 2 in Table 1 employs such a bending process outside the extrusion head, and has an atmospheric pressure of -98658PA (atmospheric pressure of -740 mm).
Hg). As is clear from this table, processing up to 20,000 N becomes possible, and accordingly, a high elastic modulus film can be used.

【００５０】このことは、押出ヘッド内曲げ処理の場
合、押出ヘッド１１内を減圧してもフィルムの密着効果
は５０００Ｎ〜せいぜい１００００Ｎ未満までが限界が
あるのに対して、押出ヘッド外曲げ処理して減圧すれば
２００００Ｎまで加工できることを意味する。また予め
円筒形状に付形しておくことにより、押出ヘッド内曲げ
処理よりも加工が容易になる。しかも、押出後の高弾性
率フィルムは円筒形状を維持しようと作用するのでこの
点も加工性向上に役立つ。This means that in the case of bending inside the extrusion head, even if the inside of the extrusion head 11 is depressurized, there is a limit to the film adhesion effect from 5000 N to at most less than 10,000 N. Means that processing up to 20,000 N is possible if the pressure is reduced. In addition, by shaping in advance into a cylindrical shape, the processing becomes easier than the bending treatment in the extrusion head. In addition, the extruded high modulus film acts to maintain the cylindrical shape, which also contributes to the improvement of workability.

【００５１】なお、このような高弾性率フィルムを使用
するときは、マンドレル装着時及び製品ホースでの屈曲
性向上を図ることが好ましく、このような目的として、
円筒形状に付形したとき周方向へ延びる凹凸を設けるこ
とにより全体又は一部をジャバラ形状にしておくことが
効果的である。When such a high elasticity film is used, it is preferable to improve the flexibility at the time of mounting the mandrel and at the product hose.
It is effective to make the whole or a part bellows-shaped by providing irregularities extending in the circumferential direction when shaped into a cylindrical shape.

【００５２】また、０．０５ｍｍ以上の厚みの中間層２
では、オーバーラップ部６にフィルム肉厚分の段差が生
じ、内外層ゴムを被覆しても内層内面あるいは外層外面
に段差が残りやすい。ホースの内面あるいは外面に筋状
の段差が存在しているとゴムホース１を相手部材へ取付
けるときバネクリップで固定しても締め応力が不均一に
なるためにシール性、抜け性が問題になることがある。The intermediate layer 2 having a thickness of 0.05 mm or more
In this case, a step corresponding to the thickness of the film is generated in the overlap portion 6, and the step easily remains on the inner surface of the inner layer or the outer surface of the outer layer even if the inner and outer layer rubbers are covered. If there is a streak-like step on the inner or outer surface of the hose, the tightening stress will be non-uniform even if the rubber hose 1 is fixed to the mating member with a spring clip. There is.

【００５３】上記問題はフィルムの肉厚が大きく、弾性
が強くなるほど顕著になるが、フィルム５の長辺部８，
８をオーバーラップ部の長さよりも所定寸法（例えば、
１０ｍｍ程度）足した範囲内で薄肉テーパー化すること
により、オーバーラップ部６の段差を大幅に解消でき
る。長辺部８，８の薄肉テーパー加工はフィルム５の押
出時に加工することもできる。The above problem becomes more pronounced as the thickness of the film increases and the elasticity increases.
8 is a predetermined dimension (for example,
By making the taper thinner within the added range, the step of the overlap portion 6 can be largely eliminated. The thin side taper processing of the long sides 8 can be performed at the time of extruding the film 5.

【００５４】さらに、高弾性率フィルムを使用した場合
における押出成形後における加工性向上のため、ゴム材
料１００重量部に、熱可塑性樹脂を２〜３０重量部混合
したものを使用することもできる。混合用の樹脂とし
て、ＰＰ、ＰＢＴ、ポリメチルペンテン、ＰＳ等が可能
である。Further, in order to improve workability after extrusion molding when a high elastic modulus film is used, a mixture of 100 parts by weight of a rubber material and 2 to 30 parts by weight of a thermoplastic resin may be used. As a resin for mixing, PP, PBT, polymethylpentene, PS and the like can be used.

【００５５】このようにすると、ゴム材料中の樹脂はゴ
ムと非相溶であれば、加硫後も樹脂そのままで含有され
る。加硫ゴム中の樹脂は熱可塑性の性質を有しているた
め、軟化点以上の温度にすれば可塑性を示すようにな
る。一方、加硫ゴムは一度加硫すればゴム弾性の性質を
恒久的に失わない。そこで、ゴムと熱可塑性樹脂を混合
することにより、加硫後に再度軟化点に加熱して変形を
加えてから冷却すると再変形後の形状を保持可能とな
り、さら再び加熱すれば再変形を除去することが可能で
ある。具体的には、押出直後に半加硫してゴム硬度を上
げて挿入しやすくしてからさらにマンドレルへ装着して
から本加硫する。In this case, if the resin in the rubber material is incompatible with the rubber, the resin is contained as it is after vulcanization. Since the resin in the vulcanized rubber has a thermoplastic property, it becomes plastic at a temperature higher than the softening point. On the other hand, vulcanized rubber, once vulcanized, does not permanently lose its rubber elasticity. Therefore, by mixing the rubber and the thermoplastic resin, it is possible to maintain the shape after re-deformation by heating to the softening point again after vulcanization, applying deformation, and then cooling, and removing the re-deformation by heating again. It is possible. Specifically, semi-vulcanization is performed immediately after extrusion to increase the rubber hardness so that the rubber can be easily inserted, and then attached to a mandrel and then vulcanized.

【００５６】これにより、マンドレル装着時における、
曲げＲ部のシワやよじれ、端面のつぶれ、表面への軍手
跡の付着等の諸問題を改善してゴムホースの生産性の問
題点を改善できるようになる。Thus, when the mandrel is attached,
Various problems such as wrinkling and kinking of the bent R portion, crushing of the end face, adhesion of military gloves to the surface, and the like, can improve the productivity of rubber hoses.

【００５７】また、本願発明をクロスヘッド工法で成形
することもできる。以下この実施例を説明する。図７は
内層押出機４０と外層押出機４１をヘッド４２に対して
直交方向から接続し、かつこれら内層押出機４０と外層
押出機４１が接続するヘッド４２の中間部にフィルム５
の供給部４３を形成してある。Further, the present invention can be formed by a crosshead method. Hereinafter, this embodiment will be described. FIG. 7 shows that the inner layer extruder 40 and the outer layer extruder 41 are connected to the head 42 in a direction perpendicular to the head 42, and the film 5 is provided at an intermediate portion of the head 42 where the inner layer extruder 40 and the outer layer extruder 41 are connected.
Is formed.

【００５８】ヘッド４２の構造は拡大部に示すように、
内芯４４の周囲に内層押出機４０が接続する内層ゴム通
路４５から内層ゴム３を押し出し、その周囲へフィルム
供給部４３から供給されるテープ状のフィルム５を螺旋
状に巻き付け（図８参照）、さらにその上へ外層押出機
が接続する外層ゴム通路４６から外層ゴム４を押し出し
て積層することにより所望のホース１が得られる。The structure of the head 42 is as shown in the enlarged portion.
The inner layer rubber 3 is extruded from the inner layer rubber passage 45 to which the inner layer extruder 40 is connected around the inner core 44, and the tape-shaped film 5 supplied from the film supply unit 43 is spirally wound therearound (see FIG. 8). A desired hose 1 is obtained by extruding and laminating the outer layer rubber 4 thereon through an outer layer rubber passage 46 to which an outer layer extruder is connected.

【００５９】このようにクロスヘッド工法を用いると、
フィルム５を螺旋状に巻き付けることが可能になる。こ
のとき、図９に示すように、内層ゴム３の長手方向に対
してその周囲へフィルム５がオーバーラップ部６を形成
するようにし、このオーバーラップ部６をフィルム供給
部４３から真空吸引することにより、吸着して密着を維
持するようにできる。なお、図８は内層ゴム３の周囲へ
フィルム５を巻き付ける状態を示し、図９はその一部拡
大断面である。When the crosshead method is used as described above,
The film 5 can be spirally wound. At this time, as shown in FIG. 9, the film 5 forms an overlap portion 6 around the inner layer rubber 3 in the longitudinal direction, and the overlap portion 6 is vacuum-sucked from the film supply portion 43. Thereby, it is possible to adsorb and maintain the close contact. FIG. 8 shows a state in which the film 5 is wound around the inner layer rubber 3, and FIG. 9 is a partially enlarged cross-sectional view thereof.

【００６０】図１０はオーバーラップ部６の別構造を示
す図であり、長辺部側のオーバーラップする部分に微細
な凹部又は凸部もしくは凹凸からなる粗面部５０が粗面
加工により形成されている。この粗面部５０によりオー
バーラップ部６の摩擦が大きくなるのでずれにくくな
る。なお、粗面加工はショットブラストのような適宜の
機械的方法及び薬品処理による表面を粗面化する方法等
がある。FIG. 10 is a view showing another structure of the overlap portion 6. A rough surface portion 50 made of a fine concave portion, convex portion, or uneven portion is formed by rough surface processing in the overlapping portion on the long side portion. I have. The friction of the overlap portion 6 is increased by the rough surface portion 50, so that it becomes difficult to shift. Note that the rough surface processing includes an appropriate mechanical method such as shot blasting, a method of roughening the surface by chemical treatment, and the like.

【００６１】図１１は積層フィルムを採用した場合の積
層構造の例であり、配向方向や延伸方向を９０°違いに
したフィルム５１及び５２を積層一体化して積層構造の
フィルム５を構成する。このようにすると、円筒状にす
るために曲げる場合も、円筒状に形成した後で長手方向
に曲げる場合も、いずれの場合においても曲げやすくか
つ十分な強度を確保できる。FIG. 11 shows an example of a laminated structure in the case of employing a laminated film. Films 51 and 52 in which the orientation direction and the stretching direction are different by 90 ° are laminated and integrated to form a film 5 having a laminated structure. This makes it easy to bend and secure sufficient strength in both cases of bending to form a cylindrical shape and bending in the longitudinal direction after forming into a cylindrical shape.

【００６２】図１２はオーバーラップ部６の接合に関す
る別例であり、この例では重なり合う部分に耐燃料油特
性に優れた接着剤層６０を介在させてある。このように
すると接着剤層６０により燃料油の浸透に対するより高
度なシールを形成できる。なお接着剤層６０をホットメ
ルトタイプにすればオーバーラップ部６の熱溶着による
結合と同時に接着できるため好都合である。FIG. 12 shows another example of the joining of the overlap portion 6. In this example, an adhesive layer 60 having excellent fuel oil resistance is interposed in the overlapping portion. In this way, the adhesive layer 60 can form a more advanced seal against penetration of fuel oil. It is convenient to make the adhesive layer 60 a hot-melt type, since it can be bonded simultaneously with the bonding of the overlap portions 6 by thermal welding.

【００６３】図１３はオーバーラップ部６の段差Ｄをな
くすための別案であり、この例では、まず段差Ｄのある
一般的な構造のオーバーラップ部６を形成した円筒状に
し（Ａ）、その後、超音波溶融等の手段で段差を溶融し
て少なくとも外表面側の段差を解消する（Ｂ）。このよ
うにすると、予め重ねる前にフィルム５の端部を薄肉に
しておく場合と比べて、重ね合わせるときそれ程精度を
要求されないので、製造が容易になる。FIG. 13 shows another alternative for eliminating the step D of the overlapping portion 6. In this example, first, the overlapping portion 6 is formed into a cylindrical shape having the general overlapping portion 6 with the step D (A). Thereafter, the step is melted by means such as ultrasonic melting to eliminate at least the step on the outer surface side (B). In this case, compared to the case where the end portions of the films 5 are thinned before the film is stacked in advance, the accuracy is not so much required when the films 5 are stacked, so that the manufacturing is facilitated.

【図面の簡単な説明】[Brief description of the drawings]

【図１】実施例の成形装置全体を示す図FIG. 1 is a diagram showing an entire molding apparatus according to an embodiment.

【図２】実施例の押出成形時におけるフィルムの変化を
示す図FIG. 2 is a diagram showing a change in a film during extrusion molding of an example.

【図３】押出ヘッド内の要部拡大断面図FIG. 3 is an enlarged sectional view of a main part in the extrusion head.

【図４】図１の４−４線に略沿う断面図FIG. 4 is a sectional view taken substantially along the line 4-4 in FIG. 1;

【図５】押出ヘッドの鍾愛断面図FIG. 5 is a cross-sectional view of the extrusion head.

【図６】マンドレル装着工程を示す図FIG. 6 is a diagram showing a mandrel mounting process.

【図７】別実施例のクロスヘッド工法を示す図FIG. 7 is a diagram showing a crosshead method according to another embodiment.

【図８】上記工法によるフィルムの螺旋巻きを示す図FIG. 8 is a view showing a spiral winding of a film by the above method.

【図９】その一部拡大断面図FIG. 9 is a partially enlarged cross-sectional view thereof.

【図１０】オーバーラップ部の別構造を示す図FIG. 10 is a diagram showing another structure of the overlap portion.

【図１１】積層フィルムを採用した場合の積層構造の別
例を示す図FIG. 11 is a diagram showing another example of a laminated structure when a laminated film is employed.

【図１２】オーバーラップ部の接合に関する別例を示す
図FIG. 12 is a view showing another example regarding the joining of the overlap portion.

【図１３】オーバーラップ部の段差をなくすための別案
を示す図FIG. 13 is a view showing another alternative for eliminating a step in the overlap portion.

【符号の説明】[Explanation of symbols]

１：ゴムホース、２：中間層、３：内層ゴム、４：外層
ゴム、５：フィルム、８：長辺部、１０：成形装置、１
１：押出ヘッド、１２：中間通路、１３：中間層形成部1: rubber hose, 2: middle layer, 3: inner layer rubber, 4: outer layer rubber, 5: film, 8: long side portion, 10: molding device, 1
1: extrusion head, 12: intermediate passage, 13: intermediate layer forming part

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｂ３２Ｂ 25/04 Ｂ３２Ｂ 25/04 Ｆ１６Ｌ 11/08 Ｆ１６Ｌ 11/08 Ａ // Ｂ２９Ｋ 21:00 Ｂ２９Ｋ 21:00 Ｂ２９Ｌ 23:00 Ｂ２９Ｌ 23:00 (72)発明者 藤井 寛美 埼玉県入間郡大井町大字亀久保1239番地 山下ゴム株式会社内 Ｆターム(参考） 3H111 AA02 BA13 BA25 BA29 CA52 CB04 CB05 CB14 CB24 CC04 CC18 DA09 DA11 DA12 DA14 DB02 DB11 EA04 4F100 AA20 AB01A AB10 AB33 AK01A AK04 AK17 AK27 AK27J AK29 AK29J AK48 AK52 AK73 AK75 AL01 AN00B AN00C AN02 AT00A BA03 BA04 BA05 BA10B BA10C DA02 EA021 EH232 EH66 EJ062 EJ242 JB16A JD02 JJ03 JK04A JK07 JL02 YY00A 4F207 AA09 AA45 AD03 AD05 AD08 AG03 AG08 AM28 KA01 KA17 KB18 KB26 KJ05 KL58 KL65──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) B32B 25/04 B32B 25/04 F16L 11/08 F16L 11/08 A // B29K 21:00 B29K 21:00 B29L 23:00 B29L 23:00 (72) Inventor Hiromi Fujii 1239 Kamekubo Oimachi, Iruma-gun, Saitama F-term (reference) 3Y111 AA02 BA13 BA25 BA29 CA52 CB04 CB05 CB14 CB24 CC04 CC18 DA09 DA11 DA12 DA14 DB02 DB11 EA04 4F100 AA20 AB01A AB10 AB33 AK01A AK04 AK17 AK27 AK27J AK29 AK29J AK48 AK52 AK73 AK75 AL01 AN00B AN00C AN02 AT00A BA03 BA04 BA05 BA10B BA10C DA02 EA02 J02 A02J02 JE02A02JE12 JE03A04 AG03 AG08 AM28 KA01 KA17 KB18 KB26 KJ05 KL58 KL65

Claims (6)

【特許請求の範囲】[Claims] 【請求項１】略円筒状をなすフィルム製の中間層内外へ
内層ゴムと外層ゴムを押し出してゴムホースを成形する
方法において、帯状のフィルムをその幅方向両側にある
一対の縁部が重なり合わさってオーバーラップ部を形成
するよう略円筒状に丸めて押出ヘッド内へ供給するとと
もに、この押出ヘッド内で前記オーバーラップ部を減圧
吸引しつつこのフィルムの内外へ前記内層ゴムと外層ゴ
ムを押し出すことを特徴とするフィルム中間層を有する
ゴムホースの製法。1. A method for forming a rubber hose by extruding an inner rubber layer and an outer rubber layer into and out of an intermediate layer made of a film having a substantially cylindrical shape, wherein a pair of edges on both sides in a width direction of the band-shaped film are overlapped. While being supplied into the extrusion head after being rounded into a substantially cylindrical shape so as to form an overlap portion, extruding the inner layer rubber and the outer layer rubber into and out of the film while vacuum-suctioning the overlap portion in the extrusion head. A method for producing a rubber hose having a film intermediate layer. 【請求項２】前記押出ヘッドの入り口で前記フィルムを
平面形状から略円筒状へ丸めながら押出ヘッド内へ供給
することを特徴とする請求項１に記載したフィルム中間
層を有するゴムホースの製法。2. The method according to claim 1, wherein the film is supplied into the extrusion head while being rounded from a planar shape to a substantially cylindrical shape at an entrance of the extrusion head. 【請求項３】前記フィルムを予め略円筒状に付形してか
ら押出ヘッド内へ供給することを特徴とする請求項１に
記載したフィルム中間層を有するホースの製法。3. The method for producing a hose having a film intermediate layer according to claim 1, wherein the film is formed into a substantially cylindrical shape in advance and then supplied into an extrusion head. 【請求項４】前記フィルムが熱可塑性樹脂もしくは金属
等の無機材料又はこれらを組み合わせた積層構造で構成
されていることを特徴とする請求項１に記載したフィル
ム中間層を有するゴムホースの製法。4. The method according to claim 1, wherein the film is made of a thermoplastic resin, an inorganic material such as a metal, or a laminated structure of a combination thereof. 【請求項５】前記フィルムが、フィルム幅１００ｍｍで
厚み０．０５ｍｍのときの曲げ荷重が４００Ｎ以上であ
ることを特徴とする請求項１に記載したフィルム中間層
を有するゴムホースの製法。5. The method for producing a rubber hose having a film intermediate layer according to claim 1, wherein the bending load when the film has a film width of 100 mm and a thickness of 0.05 mm is 400 N or more. 【請求項６】前記オーバーラップ部にて重なる一対の縁
部をそれぞれ幅方向の端へ向かって薄くなるように肉厚
をテーパー状に形成したことを特徴とする請求項１に記
載したゴムホースの製法。6. The rubber hose according to claim 1, wherein the pair of edges overlapping at the overlap portion are formed in a tapered shape so as to become thinner toward ends in the width direction. Manufacturing method.
JP2001180732A 2000-09-29 2001-06-14 Method of manufacturing rubber hose having film intermediate layer Withdrawn JP2002172677A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2001180732A JP2002172677A (en) 2000-09-29 2001-06-14 Method of manufacturing rubber hose having film intermediate layer

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2000301531 2000-09-29
JP2000-301531 2000-09-29
JP2001180732A JP2002172677A (en) 2000-09-29 2001-06-14 Method of manufacturing rubber hose having film intermediate layer

Publications (1)

Publication Number Publication Date
JP2002172677A true JP2002172677A (en) 2002-06-18

Family

ID=26601313

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2001180732A Withdrawn JP2002172677A (en) 2000-09-29 2001-06-14 Method of manufacturing rubber hose having film intermediate layer

Country Status (1)

Country Link
JP (1) JP2002172677A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011256923A (en) * 2010-06-08 2011-12-22 Bridgestone Corp Hose

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011256923A (en) * 2010-06-08 2011-12-22 Bridgestone Corp Hose

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