JPS62189146A - Manufacture of fiber reinforced rubber hose - Google Patents
Manufacture of fiber reinforced rubber hoseInfo
- Publication number
- JPS62189146A JPS62189146A JP61031066A JP3106686A JPS62189146A JP S62189146 A JPS62189146 A JP S62189146A JP 61031066 A JP61031066 A JP 61031066A JP 3106686 A JP3106686 A JP 3106686A JP S62189146 A JPS62189146 A JP S62189146A
- Authority
- JP
- Japan
- Prior art keywords
- rubber layer
- outer periphery
- layer
- fiber reinforced
- fiber
- 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.)
- Pending
Links
- 239000000835 fiber Substances 0.000 title claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 14
- 238000001125 extrusion Methods 0.000 claims abstract description 6
- 230000002093 peripheral effect Effects 0.000 claims abstract description 6
- 238000009954 braiding Methods 0.000 claims abstract description 5
- 238000004073 vulcanization Methods 0.000 claims description 19
- 230000003014 reinforcing effect Effects 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 67
- 238000010438 heat treatment Methods 0.000 description 16
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 1
- -1 and secondly Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Landscapes
- Rigid Pipes And Flexible Pipes (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は耐圧性及び耐衝撃性に優れた繊維補強ゴムホー
スの製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing a fiber-reinforced rubber hose with excellent pressure resistance and impact resistance.
従来、繊維補強ゴムホースは、樹脂やゴム等で作成した
可撓性マンドレルの外周に内面ゴム層を押出成形し、加
硫罐に入れて内面ゴム層を加硫または半加硫し、加硫ま
たは半加硫した内面ゴム層の外周に中間ゴム層を押出成
形し、中間ゴム層の外周にポリエステル繊維等からなる
繊維補強層を形成し、繊維補強層の外周に外面ゴム層を
押出成形し、全体を再度加硫罐に入れて一体加硫するこ
とにより製造するのが一般的である。Conventionally, fiber-reinforced rubber hoses are manufactured by extruding an inner rubber layer around the outer periphery of a flexible mandrel made of resin or rubber, placing the inner rubber layer in a vulcanization can, and vulcanizing or semi-vulcanizing the inner rubber layer. An intermediate rubber layer is extruded around the outer periphery of the semi-vulcanized inner rubber layer, a fiber reinforced layer made of polyester fiber etc. is formed around the outer periphery of the intermediate rubber layer, an outer rubber layer is extruded around the outer periphery of the fiber reinforced layer, It is common to manufacture the product by putting the entire product back into the vulcanization can and vulcanizing it as one unit.
内面ゴム層を加硫せずに、未加硫の内面ゴム層の外周に
直接繊維補強層を形成し、更にその外周に外面ゴム層を
押出成形した後、全体を加硫罐で一体加硫すれば、繊維
補強層の収縮と内面ゴム層の膨張により内面ゴム層の一
部が繊維補強層の網目から外側に膨出し、得られたホー
スの外周表面に凹凸が発生してしまう。外面ゴム層の外
周に鉛被覆を施してから加硫する被鉛加硫によればホー
スの外周表面が拘束されているので凹凸の発生は防げる
が、鉛被覆工程及び割鉛剥離二［稈が必要になるので更
に多くの設備とエネルギーを要する等の問題点がある。Without vulcanizing the inner rubber layer, a fiber reinforcement layer is formed directly on the outer periphery of the unvulcanized inner rubber layer, and then the outer rubber layer is extruded around the outer periphery, and then the whole is vulcanized in a vulcanization can. Then, due to contraction of the fiber reinforced layer and expansion of the inner rubber layer, a portion of the inner rubber layer bulges outward from the mesh of the fiber reinforced layer, resulting in unevenness on the outer circumferential surface of the resulting hose. Lead-covered vulcanization, in which lead coating is applied to the outer periphery of the outer rubber layer and then vulcanized, prevents the occurrence of unevenness because the outer circumferential surface of the hose is restrained. There are problems such as the need for more equipment and energy.
そこで、上記のごとく加硫罐内で内面ゴム層を加硫また
は半加硫した後、硬化した内面ゴム層の外周に接着層と
しての中間ゴム層を簿く形成し、その」二に繊維補強層
を形成する」二記の製造方法が一般に採用されているの
である。しかし、内面ゴム層の加硫に加硫罐を使用する
ので、内面ゴム層の押出成形と加硫企連続して実施でき
ず、生産性が著しく低いという欠点があった。Therefore, after vulcanizing or semi-vulcanizing the inner rubber layer in a vulcanization can as described above, an intermediate rubber layer as an adhesive layer is formed on the outer periphery of the cured inner rubber layer, and secondly, fiber reinforcement is applied. The two manufacturing methods described in "forming layers" are generally employed. However, since a vulcanization can is used to vulcanize the inner rubber layer, extrusion molding and vulcanization of the inner rubber layer cannot be carried out continuously, resulting in extremely low productivity.
この連続加硫ができない欠点を解決すべく、ＵＩ（Ｆ加
熱炉及び加熱媒体を用いた加熱管でのオープン加硫も一
部で使用されている。しかし、この方法は内面ゴム層を
押出成形しながら連続加硫することが可能であるが、そ
の反面１１ ＨＦ加熱炉ては内面ゴム層が内部から加熱
されるので発泡しやずくシール性を損なう等の欠点があ
り、また加熱管では内面ゴム層の表面に加熱媒体である
油等の汚れが付着して中間ゴム層と内面ゴム層との密着
性を阻害する欠点がある。更に、いずれの方法において
も内面ゴム層全体が加硫または半加硫されるので、内面
ゴム層は最後の加硫罐での一体加硫により過度に高温に
曝されて脆くなる欠点がある。In order to solve this drawback that continuous vulcanization is not possible, open vulcanization in a heating tube using a UI (F heating furnace and heating medium) is also used in some cases. However, this method does not allow the inner rubber layer to be extruded. However, on the other hand, 11 HF heating furnaces heat the inner rubber layer from the inside, which has disadvantages such as foaming and impairing the sealing properties. There is a drawback that dirt such as oil, which is a heating medium, adheres to the surface of the rubber layer and impairs the adhesion between the intermediate rubber layer and the inner rubber layer.Furthermore, in either method, the entire inner rubber layer is not vulcanized or Since it is semi-vulcanized, the inner rubber layer has the disadvantage that it becomes brittle due to being exposed to excessively high temperatures during integral vulcanization in the final vulcanization can.
本発明は、内面ゴム層を連続的に押出成形しながら連続
して加硫または半加硫でき、しかも内面ゴム層を汚染す
ることなく、その外周表面部のみを効率良く加硫または
半加硫することのできる、生産性に優れた繊維補強ゴム
ホースの製造方法を提供することをＨ的とする。The present invention enables continuous vulcanization or semi-vulcanization while continuously extruding the inner rubber layer, and efficiently vulcanizes or semi-vulcanizes only the outer peripheral surface of the inner rubber layer without contaminating the inner rubber layer. The objective is to provide a method for manufacturing a fiber-reinforced rubber hose with excellent productivity.
本発明の繊維補強ゴムホースの製造方法は、可撓性マン
ドレルの外周に内面ゴム層を押出成形しながら内面ゴム
層の外周に近赤外線を照射することにより内面ゴム層の
外周表面部のみを連続的に加硫または半加硫する工程と
、加硫または半加硫した内面ゴム層の外周に薄く中間ゴ
ム層を押出成形する工程と、中間ゴム層の外周に繊維補
強層を形成する工程と、繊維補強層の外周に外面ゴム層
を押出成形する工程と、最後に全体を加硫罐で一体加硫
する工程とから７：Ｃつでいる。The method for manufacturing a fiber-reinforced rubber hose of the present invention involves extruding an inner rubber layer around the outer periphery of a flexible mandrel and irradiating the outer periphery of the inner rubber layer with near-infrared rays to continuously form only the outer peripheral surface of the inner rubber layer. a step of vulcanizing or semi-vulcanizing, a step of extruding a thin intermediate rubber layer around the outer periphery of the vulcanized or semi-vulcanized inner rubber layer, and a step of forming a fiber reinforced layer around the outer periphery of the intermediate rubber layer, Step 7:C consists of the step of extruding an outer rubber layer around the outer periphery of the fiber reinforcing layer, and finally the step of integrally vulcanizing the whole in a vulcanization can.
近赤外線は１μｍ前後の波長を有する赤外線であり、近
赤外線ランプの電力密度は４０〜１４０η抛であって通
常の遠赤外線や中赤外線ヒータ等の２〜１０倍の電力密
度を発揮できる。従って、近赤外線ランプのフィラメン
ト湿度は２０００Ｃ前後テ動作するので非常に高いエネ
ルギー密度を得ることができ、内面ゴム層を急速に加熱
することができる。又、近赤外線は色に対する吸収率の
変化が大きく、他の赤外線に比較して黒の吸収率が優れ
ている。Near-infrared rays are infrared rays having a wavelength of around 1 μm, and the power density of a near-infrared lamp is 40 to 140 η, which is 2 to 10 times higher than a normal far-infrared or mid-infrared heater. Therefore, since the near-infrared lamp operates at a filament humidity of around 2000C, a very high energy density can be obtained and the inner rubber layer can be heated rapidly. Furthermore, the absorption rate of near-infrared rays varies greatly depending on the color, and the absorption rate of black is superior to other infrared rays.
しかも、内面ゴム層の通過する加熱炉の中心軸に平行に
複数の近赤外線ランプを径方向に等間隔に配置し、且つ
加熱炉の中心軸に対して近赤外線ランプと反対側に反射
面を設置することにより、近赤外線を内面ゴム層の外周
面に集光させることができるので、一層高速加熱が可能
になる。Furthermore, a plurality of near-infrared lamps are arranged at equal intervals in the radial direction parallel to the central axis of the heating furnace through which the inner rubber layer passes, and a reflective surface is provided on the opposite side of the near-infrared lamps with respect to the central axis of the heating furnace. By installing this, near-infrared rays can be focused on the outer circumferential surface of the inner rubber layer, thereby enabling even faster heating.
近赤外線は非常（・こ高いエネルギー密度を有し且つ内
面ゴム層に良く吸収されるので、内面ゴム層を極めて短
時間で加硫温度まで加熱する。そこで近赤外線ランプと
内面ゴム層の距離や近赤外線の照射時間を３秒以下に調
節して、内面ゴム層の外周表面部のみを１闘以下、好ま
しくは０．１〜０．３關の厚さで加硫または半加硫でき
る。近赤外線ランプによる加熱時間とゴム内部温度との
関係を第２図に示す。このグラフは２００■で、Ｉ Ｋ
Ｗの近赤外線ランプ２本の中間に厚さ２龍のゴム層を置
き、ランプとゴムとの距離を変えてゴムの中心での温度
上昇を工Ｃ熱電対で測定したものである。Near-infrared rays have a very high energy density and are well absorbed by the inner rubber layer, so it heats the inner rubber layer to the vulcanization temperature in a very short time. Therefore, the distance between the near-infrared lamp and the inner rubber layer By adjusting the near-infrared irradiation time to 3 seconds or less, only the outer peripheral surface of the inner rubber layer can be vulcanized or semi-vulcanized to a thickness of 1 mm or less, preferably 0.1 to 0.3 mm. Figure 2 shows the relationship between the heating time using an infrared lamp and the internal temperature of the rubber.
A rubber layer with a thickness of 2 mm was placed between two W near-infrared lamps, and the temperature rise at the center of the rubber was measured with a C thermocouple while changing the distance between the lamp and the rubber.
第２図から判るように、ゴムに近赤外線をランプのフィ
ラメントからの距離５０歯以下で照射した場合にゴムの
中心は３′秒以内に約２００Ｃ以」二の充分な加硫温度
に達する。As can be seen from FIG. 2, when the rubber is irradiated with near-infrared rays at a distance of less than 50 teeth from the filament of the lamp, the center of the rubber reaches a sufficient vulcanization temperature of about 200 C or more within 3' seconds.
従って、内面ゴム層を押出成形しながら近赤外線ランプ
を具えた加熱炉に導入して、内面ゴム層の外周表面部を
汚染することなく、短時間で表面部のみを連続的に加硫
または半加硫できる。しかし、繊維補強層の編組時のテ
ンションが太さすぎるよ、最後の一体加硫時に内面ゴム
層の加硫されている表面部が破裂し、繊維補強層の網目
から内面ゴム層の・一部が膨出する危険があるので、繊
維補強層の編組の際のテンションは５ ｋｐ以下にする
のが好ましい。Therefore, while extruding the inner rubber layer, it is introduced into a heating furnace equipped with a near-infrared lamp to continuously vulcanize or semi-cure only the surface portion in a short time without contaminating the outer peripheral surface of the inner rubber layer. Can be vulcanized. However, the tension when braiding the fiber reinforced layer is too thick, and during the final integral vulcanization, the vulcanized surface of the inner rubber layer ruptures, and a part of the inner rubber layer is exposed through the mesh of the fiber reinforced layer. Since there is a risk of bulging, the tension during braiding of the fiber reinforcing layer is preferably 5 kp or less.
第１図を参照して本発明方法の実施例を説明する。 An embodiment of the method of the present invention will be described with reference to FIG.
可撓性のゴムマンドレル］の外周に内面ゴム層２を連続
して押出成形しながら、そのま〈近赤外線ランプ４を具
えた加熱炉３に連続的に導入して加硫した。加熱炉３は
内面ゴム層２が通過する長手方向中心軸に平行に４本の
近赤外線ランプ４を径方向に等間隔に配置してあり、且
つ中心軸に対して近赤外線ランプ４の周囲に放物線をな
す反射面５を夫々設置することにより、矢印で示すよう
に近赤外線を内面ゴム層２の外周表面に集光でさるよう
になっている。While the inner rubber layer 2 was continuously extruded around the outer periphery of a flexible rubber mandrel, it was continuously introduced into a heating furnace 3 equipped with a near-infrared lamp 4 for vulcanization. The heating furnace 3 has four near-infrared lamps 4 arranged at equal intervals in the radial direction parallel to the longitudinal central axis through which the inner rubber layer 2 passes, and around the near-infrared lamps 4 with respect to the central axis. By installing the reflecting surfaces 5 each forming a parabola, near-infrared rays are condensed onto the outer circumferential surface of the inner rubber layer 2 as shown by the arrows.
下表に内面ゴム層の押出条件、加熱条件及び得られた加
硫部分の状態を要約した。The table below summarizes the extrusion conditions and heating conditions for the inner rubber layer and the state of the obtained vulcanized part.
本発明によれば、内面ゴム層の加硫に近赤外線を利用す
るので、内面ゴム層を押出成形しながら連続して加硫又
は半加硫することができ、しかも内面ゴム層を汚染する
ことなくその外周表面部のみを効率良く加硫または半加
硫することが可能となり、品質の優れた繊維補強ゴムホ
ースを高い生産性で製造することができる。According to the present invention, since near-infrared rays are used to vulcanize the inner rubber layer, the inner rubber layer can be continuously vulcanized or semi-vulcanized while being extruded, and the inner rubber layer is not contaminated. It becomes possible to efficiently vulcanize or semi-vulcanize only the outer circumferential surface of the hose, and a fiber-reinforced rubber hose of excellent quality can be manufactured with high productivity.
第１図は近赤外線を利用する本発明法により内面ゴム層
を加硫する状態での加熱炉の断面図であり、第２図は近
赤外線ランプでの加熱時間とゴム内部の温度の関係を示
すグラフである。
１・・マンドレル ２・・内面ゴム層 ３・・加熱炉４
・・近赤外線ランプ ５・・反射面
第１図
Ｉマ′／ドレルFigure 1 is a cross-sectional view of a heating furnace in which the inner rubber layer is vulcanized by the method of the present invention using near-infrared rays, and Figure 2 shows the relationship between the heating time with a near-infrared lamp and the temperature inside the rubber. This is a graph showing. 1. Mandrel 2. Inner rubber layer 3. Heating furnace 4
...Near infrared lamp 5.Reflecting surface Figure 1 Ima'/Dorel
Claims (3)
しながら内面ゴム層の外周に近赤外線を照射することに
より内面ゴム層の外周表面部のみを連続的に加硫または
半加硫する工程と、加硫または半加硫した内面ゴム層の
外周に薄い中間ゴム層を押出成形する工程と、中間ゴム
層の外周に繊維補強層を形成する工程と、繊維補強層の
外周に外面ゴム層を押出成形する工程と、最後に全体を
加硫罐で一体加硫する工程とからなる繊維補強ゴムホー
スの製造方法。(1) While extruding the inner rubber layer around the outer periphery of a flexible mandrel, the outer periphery of the inner rubber layer is irradiated with near infrared rays to continuously vulcanize or semi-vulcanize only the outer peripheral surface of the inner rubber layer. a step of extruding a thin intermediate rubber layer around the outer periphery of the vulcanized or semi-vulcanized inner rubber layer, a step of forming a fiber reinforced layer around the outer periphery of the intermediate rubber layer, and a step of forming an outer rubber layer around the outer periphery of the fiber reinforced layer. A method for manufacturing a fiber-reinforced rubber hose, which consists of a process of extrusion molding the layers, and finally a process of integrally vulcanizing the whole in a vulcanization can.
ある、特許請求の範囲（１）項記載の繊維補強ゴムホー
スの製造方法。(2) The method for manufacturing a fiber-reinforced rubber hose according to claim (1), wherein the irradiation time of the near-infrared rays to the inner rubber layer is 3 seconds or less.
形成する、特許請求の範囲（１）項記載の繊維補強ゴム
ホースの製造方法。(3) The method for manufacturing a fiber-reinforced rubber hose according to claim (1), wherein the fiber-reinforced layer is formed by braiding the fiber-reinforced layer with a tension of 5 kg or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61031066A JPS62189146A (en) | 1986-02-14 | 1986-02-14 | Manufacture of fiber reinforced rubber hose |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61031066A JPS62189146A (en) | 1986-02-14 | 1986-02-14 | Manufacture of fiber reinforced rubber hose |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62189146A true JPS62189146A (en) | 1987-08-18 |
Family
ID=12321087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61031066A Pending JPS62189146A (en) | 1986-02-14 | 1986-02-14 | Manufacture of fiber reinforced rubber hose |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62189146A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003074760A (en) * | 2001-08-31 | 2003-03-12 | Nichirin Co Ltd | Brake hose |
| CN112265301A (en) * | 2020-08-21 | 2021-01-26 | 成都飞机工业（集团）有限责任公司 | Preparation method of high-temperature-resistant, low-temperature-resistant and high-pressure-resistant rubber corrugated hose |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5351280A (en) * | 1976-10-21 | 1978-05-10 | Tokai Rubber Ind Ltd | Method of forming thin outer rubber layer on outer surface of armed blade hose |
-
1986
- 1986-02-14 JP JP61031066A patent/JPS62189146A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5351280A (en) * | 1976-10-21 | 1978-05-10 | Tokai Rubber Ind Ltd | Method of forming thin outer rubber layer on outer surface of armed blade hose |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003074760A (en) * | 2001-08-31 | 2003-03-12 | Nichirin Co Ltd | Brake hose |
| CN112265301A (en) * | 2020-08-21 | 2021-01-26 | 成都飞机工业（集团）有限责任公司 | Preparation method of high-temperature-resistant, low-temperature-resistant and high-pressure-resistant rubber corrugated hose |
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