JPH0519885B2 - - Google Patents
Info
- Publication number
- JPH0519885B2 JPH0519885B2 JP61158190A JP15819086A JPH0519885B2 JP H0519885 B2 JPH0519885 B2 JP H0519885B2 JP 61158190 A JP61158190 A JP 61158190A JP 15819086 A JP15819086 A JP 15819086A JP H0519885 B2 JPH0519885 B2 JP H0519885B2
- Authority
- JP
- Japan
- Prior art keywords
- vulcanization
- rubber hose
- mandrel
- zone
- hose
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 229920001971 elastomer Polymers 0.000 claims description 41
- 238000004073 vulcanization Methods 0.000 claims description 32
- 238000000034 method Methods 0.000 claims description 17
- 238000000465 moulding Methods 0.000 claims description 14
- 239000004636 vulcanized rubber Substances 0.000 claims description 6
- 238000010521 absorption reaction Methods 0.000 claims description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims 1
- 229910052717 sulfur Inorganic materials 0.000 claims 1
- 239000011593 sulfur Substances 0.000 claims 1
- 230000003014 reinforcing effect Effects 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000835 fiber Substances 0.000 description 3
- 230000009172 bursting Effects 0.000 description 2
- 238000010924 continuous production Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229920002943 EPDM rubber Polymers 0.000 description 1
- 229920002302 Nylon 6,6 Polymers 0.000 description 1
- 229920002978 Vinylon Polymers 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000012783 reinforcing fiber Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
Description
本発明はゴムホースの加硫方法に関し、さらに
詳しくはゴムホースを常圧で、効率的に連続的サ
イクル下で加硫することのできる新規な加硫方法
に関する。
The present invention relates to a method for vulcanizing rubber hoses, and more particularly to a novel method for vulcanizing rubber hoses under normal pressure and efficient continuous cycles.
従来、成形用マンドレルに未加硫ゴムホースを
挿入した後、加硫する方法としては、多数のマン
ドレルを加硫釜に入れ、直接圧力蒸気を送入する
方法がほとんどであつた。
また、マンドレルを使用しない直ホースにおい
ては常圧の熱空気による連続加硫方法もあるが、
熱空気加硫は熱効率が悪く、加硫に長時間を要す
ることが知られている。
Conventionally, the most common method for vulcanizing after inserting an unvulcanized rubber hose into a molding mandrel has been to place a large number of mandrels in a vulcanization pot and directly supply pressure steam. In addition, for straight hoses that do not use a mandrel, there is a continuous vulcanization method using hot air at normal pressure.
It is known that hot air vulcanization has poor thermal efficiency and requires a long time for vulcanization.
ところが、加硫釜による加硫方法では、圧力蒸
気によりゴムホース表面の美観が損なわれたり、
内層補強ゴムホースにおいては、補強糸が端面か
ら侵入する蒸気により大きく収縮したり、劣化す
る難点を有している。この湿熱劣化を避けるため
の従来技術としては、未加硫ゴムホースの端部を
シールして蒸気加硫する（特開昭59−114041号）
とか、蒸気を用いないで乾燥加圧気体を用いる方
法（特開昭59−98833号）が提案されている。し
かし、いずれの場合も加硫装置として加硫釜を用
いるため、バツチ式となるので、連続的に生産す
ることが出来ず、生産性も悪かつたのである。
このような欠点を避けるために、本発明者等は
常圧の熱空気で連続的に加硫する方法を検討した
のであるが、熱空気では加硫時には、ホースの昇
温と熱容量の大なマンドレルの吸熱が同時に生じ
て、ゴムホースの加硫に対する熱効率が悪く、マ
ンドレルがゴムホースの加硫に適した70℃以上に
達するのに時間がかかり、結果として、長い加硫
時間を必要としたのである。
However, with the vulcanization method using a vulcanization pot, the beauty of the rubber hose surface may be damaged due to the pressure steam.
Inner-layer-reinforced rubber hoses have the disadvantage that the reinforcing threads shrink or deteriorate significantly due to steam entering from the end face. A conventional technique to avoid this moisture-heat deterioration is to seal the end of an unvulcanized rubber hose and vulcanize it with steam (Japanese Patent Application Laid-Open No. 114041/1983).
A method using dry pressurized gas without using steam has been proposed (Japanese Patent Application Laid-Open No. 59-98833). However, in both cases, a vulcanizing pot was used as the vulcanizing device, which resulted in a batch type process, which prevented continuous production and resulted in poor productivity. In order to avoid such drawbacks, the present inventors investigated a method of continuous vulcanization using hot air at normal pressure. Heat absorption by the mandrel occurred at the same time, resulting in poor thermal efficiency for vulcanizing the rubber hose, and it took time for the mandrel to reach the temperature of 70°C or higher, which is suitable for vulcanizing the rubber hose, resulting in a long vulcanization time. .
本発明は上記のような従来の成形用マンドレル
を用いるゴムホースの加硫方法の欠点を解決する
目的でなされたものであつて、その特徴とする点
はゴムホースの成形時に過度の吸熱を避けるべく
予め加熱された（70℃以上、好ましくは90℃以上
の温度に保持した）成形用マンドレルに未加硫ゴ
ムホースを挿入して、常圧の熱空気で加硫するこ
とにある。ここで、連続的加硫をするために、成
形用マンドレルが熱空気によりゴムホースが加硫
を受ける加硫ゾーンと加硫したゴムホースを取り
はずし未加硫ゴムホースを挿入する外気ゾーンと
を巡回し、外気ゾーンではゴムホースの成形時に
過度の吸熱がない程度の（70℃以上、好ましくは
90℃以上の）充分な高温度にマンドレルを保持し
うる連続的成形サイクルとしたことを特徴とする
のである。
The present invention was made for the purpose of solving the above-mentioned drawbacks of the conventional method of vulcanizing rubber hoses using a molding mandrel. The unvulcanized rubber hose is inserted into a heated molding mandrel (maintained at a temperature of 70°C or higher, preferably 90°C or higher) and vulcanized with hot air at normal pressure. Here, in order to perform continuous vulcanization, the molding mandrel circulates between the vulcanization zone where the rubber hose is vulcanized by hot air and the outside air zone where the vulcanized rubber hose is removed and the unvulcanized rubber hose is inserted. In the zone, the temperature should be kept at a level (70°C or higher, preferably above 70°C, preferably
It is characterized by a continuous molding cycle that can maintain the mandrel at a sufficiently high temperature (90°C or higher).
このような本発明の方法によると、マンドレル
の吸熱が無くなつてゴムの加硫に充分な熱補給が
効率よくできる作用があり、成形用マンドレルを
用いる曲げ物のゴムホースでも、常圧で連続的
に、しかも短かい加硫時間で得られるのである。
さらに内層補強ホースにおいては、ビニロン繊
維、ポリエステル繊維、ナイロン繊維やアラミド
繊維など、直接蒸気加硫では、加硫中に大きく収
縮したり劣化する補強用繊維に何ら影響をおよぼ
さないのである。
According to the method of the present invention, heat absorption by the mandrel is eliminated, and sufficient heat can be efficiently supplied for vulcanization of rubber. Moreover, it can be obtained in a short vulcanization time.
Furthermore, in inner-layer reinforced hoses, direct steam vulcanization does not have any effect on reinforcing fibers such as vinylon fibers, polyester fibers, nylon fibers, and aramid fibers, which shrink or deteriorate during vulcanization.
以下実施例によつて本発明を詳細に説明する。
第１図は自動車用ヒータホースとして使用され
る内層補強ホースの断面図である。
このようなホースは、まず、内層ゴム１と外層
ゴム２を各々押出す２台のバント式押出機と、こ
れら押出機と接合し、帯状の編み布を導入するク
ロスヘツドにより、ホースの長手方向に連続した
オーバーラツプ部分３を有する補強層４を内層ゴ
ム１と外層ゴム２との間に同時押出しにより配設
する。
本実施例において使用したゴムは硬さ70ウオー
レス硬度のEPDM配合物であり、補強編み布は
ナイロン66繊維を編組後、樹脂コートしたものを
乾燥させて使用した。
この内径φ16、肉厚４mmの未加硫ゴムホースを
鉄製の予め加温された成形用マンドレルに挿入し
て、常圧の熱空気中で加硫したのであるが、次に
この方法に用いる加硫装置の一例である第２図で
具体的に説明する。
成形用マンドレル５は外気ゾーン６と熱空気加
硫ゾーン７を駆動部８により巡回するマンドレル
支持台９に装着され、未加硫ゴムホースを挿入し
た後、外気ゾーン６から熱空気加硫ゾーン７に入
り、加硫される。熱空気は通常140℃〜200℃の一
定温度範囲にコントロールされ、吹出ダクト１０
より加硫ゾーン７内へ吹出し、循環ダクト１１よ
り加熱部に循環される。加硫ゾーン７と外気ゾー
ン６は開閉扉１２などで仕切られている。加硫さ
れたゴムホースは順次外気ゾーン６でただちに取
り外され、次の未加硫ゴムホースが挿入される。
本実施例ではφ16の鉄製の成形用マンドレルを使
用し、マンドレル支持台は８台、熱空気温度は
170℃とした。
雰囲気温度12℃での外気ゾーン滞留時間を130
秒とした時の未加硫ゴムホースを挿入する直前の
マンドレル温度は最低93℃であつた。
この加硫時間15分10秒の条件で加硫した前記ヒ
ーターホースのゴムの硬さは70ウオーレス硬度で
あり、水圧による破裂圧は18.5Kgｆ／cm2であつ
た。比較例として同じ未加硫ゴムホースを蒸気釜
により６Kgｆ／cm2の蒸気圧で15分間加硫したホー
スのゴムの硬度は67ウオーレス硬度であり、水圧
による破裂圧は17Kgｆ／cm2となり両端面から５〜
10mm補強糸が収縮してなくなつていた。
また、前記常圧熱空気を用いる加硫方法におい
て、実施例と同じ条件で室温まで冷却したマンド
レル（実測温度25℃）に未加硫ゴムホースを挿入
して加硫したホースは60ウオーレス硬度以下の未
加硫ゴム部分が存在した。
以上のように成形用マンドレルが熱空気による
加硫ゾーンと、加硫したゴムを取りはずし未加硫
ゴムホースを挿入する外気ゾーンを巡回し、外気
ゾーンで未加硫ゴムホースを挿入する際にマンド
レルが吸熱しない程度の70℃以上、好ましくは90
℃以上の温度を保持しうるサイクルとしたことに
より、未加硫ゴムホースから満足すべき品質の加
硫ゴムホースを短時間で連続的に得ることができ
た。
The present invention will be explained in detail below with reference to Examples. FIG. 1 is a sectional view of an inner layer reinforced hose used as a heater hose for an automobile. Such a hose is manufactured by first using two bundt extruders that extrude an inner rubber layer 1 and an outer rubber layer 2, and a crosshead that is connected to these extruders and introduces a band-shaped knitted fabric in the longitudinal direction of the hose. A reinforcing layer 4 having a continuous overlapping portion 3 is disposed between the inner rubber layer 1 and the outer rubber layer 2 by coextrusion. The rubber used in this example was an EPDM compound with a Wallace hardness of 70, and the reinforcing knitted fabric was made of nylon 66 fibers that were braided and then coated with a resin and dried. This unvulcanized rubber hose with an inner diameter of φ16 and a wall thickness of 4 mm was inserted into a pre-heated iron molding mandrel and vulcanized in hot air at normal pressure. This will be explained in detail with reference to FIG. 2, which is an example of the device. The molding mandrel 5 is attached to a mandrel support 9 that circulates between the outside air zone 6 and the hot air vulcanization zone 7 by a drive unit 8, and after inserting the unvulcanized rubber hose, it is moved from the outside air zone 6 to the hot air vulcanization zone 7. entered and vulcanized. The hot air is normally controlled within a constant temperature range of 140°C to 200°C, and is
It is blown out into the vulcanization zone 7 and circulated through the circulation duct 11 to the heating section. The vulcanization zone 7 and the outside air zone 6 are separated by an opening/closing door 12 or the like. The vulcanized rubber hoses are immediately removed one after another in the open air zone 6 and the next unvulcanized rubber hose is inserted.
In this example, a φ16 iron molding mandrel was used, the number of mandrel supports was 8, and the hot air temperature was
The temperature was 170℃. Outside air zone residence time 130 at ambient temperature 12℃
The mandrel temperature immediately before inserting the unvulcanized rubber hose was at least 93°C. The hardness of the rubber of the heater hose vulcanized under the conditions of vulcanization time of 15 minutes and 10 seconds was 70 Wallace hardness, and the bursting pressure due to water pressure was 18.5 Kgf/cm 2 . As a comparative example, the same unvulcanized rubber hose was vulcanized for 15 minutes at a steam pressure of 6 Kgf/cm 2 in a steam pot.The rubber hardness of the hose was 67 Wallace hardness, and the bursting pressure due to water pressure was 17 Kgf/cm 2 from both ends. 5～
The 10mm reinforcing thread had shrunk and disappeared. In addition, in the above-mentioned vulcanization method using normal pressure hot air, the unvulcanized rubber hose was vulcanized by inserting it into a mandrel cooled to room temperature (actual temperature 25 °C) under the same conditions as in the example, and the hose had a Wallace hardness of 60 or less. There were unvulcanized rubber parts. As described above, the molding mandrel circulates between the hot air vulcanization zone and the outside air zone where the vulcanized rubber is removed and the unvulcanized rubber hose is inserted, and when the unvulcanized rubber hose is inserted in the outside air zone, the mandrel absorbs heat. 70℃ or higher, preferably 90℃
By using a cycle capable of maintaining a temperature of .degree. C. or higher, it was possible to continuously obtain a vulcanized rubber hose of satisfactory quality from an unvulcanized rubber hose in a short period of time.
以上の説明から明らかなように、本発明の方法
は常圧の効率的な熱空気加硫方法であり、また、
外気ゾーンと加硫ゾーンとをマンドレル支持台を
駆動してエンドレスに巡回させる常圧の熱空気加
硫装置を利用する方法であるため、次のようなす
ぐれた効果がある。
ゴムホースの表面肌が美麗である。
押出機と連動させて成形ホースの連続生産が
可能である。
加硫ゴムホースをマンドレルから取り外す作
業のロボツト化が可能である。
内層補強ホースにおいては蒸気加硫にみられ
る湿熱による補強糸の収縮や劣化がなく、内管
ゴムと外皮ゴムの接着阻害も防止できる。
常圧であるため蒸気釜にみられるような残留
圧力による災害の危険性がない。
加熱空気の循環であるため加硫に要するエネ
ルギー費用が安価である。
すなわち、本発明の方法によれば、高品質のゴ
ムホースが安価に効率的に得られるのである。
As is clear from the above description, the method of the present invention is an efficient hot air vulcanization method at normal pressure, and
Since this method utilizes a normal pressure hot air vulcanization device that circulates endlessly between the outside air zone and the vulcanization zone by driving a mandrel support, it has the following excellent effects. The surface of the rubber hose is beautiful. Continuous production of molded hoses is possible in conjunction with an extruder. It is possible to use a robot to remove the vulcanized rubber hose from the mandrel. In an inner layer reinforced hose, there is no shrinkage or deterioration of the reinforcing yarn due to moist heat that occurs in steam vulcanization, and it is also possible to prevent adhesion between the inner tube rubber and the outer rubber. Because it is at normal pressure, there is no risk of disaster due to residual pressure as seen in steam kettles. Since heating air is circulated, the energy cost required for vulcanization is low. That is, according to the method of the present invention, a high quality rubber hose can be obtained efficiently and at low cost.
第１図は内層補強ホースの断面図である。第２
図は本方法に使用した加硫装置の一例を示す平面
略図である。
１……内層ゴム、２……外層ゴム、３……オー
バーラツプ部分、４……補強層、５……成形用マ
ンドレル、６……外気ゾーン、７……熱空気加硫
ゾーン、８……駆動部、９……マンドレル支持
台、１０……吹出ダクト、１１……循環ダクト、
１２……開閉扉。
FIG. 1 is a sectional view of the inner layer reinforced hose. Second
The figure is a schematic plan view showing an example of a vulcanization apparatus used in this method. 1... Inner layer rubber, 2... Outer layer rubber, 3... Overlap portion, 4... Reinforcement layer, 5... Molding mandrel, 6... Outside air zone, 7... Hot air vulcanization zone, 8... Drive Part, 9...Mandrel support stand, 10...Blowout duct, 11...Circulation duct,
12...Opening/closing door.
Claims (1)
形用マンドレルに未加硫ゴムホースを挿入して、
常圧の熱空気中で加硫する方法であつて、成形用
マンドレルが常圧の熱空気によりゴムホースが加
硫を受ける加硫ゾーンと加硫したゴムホースを取
はずし未加硫ゴムホースを挿入する外気ゾーンと
を巡回させながら、外気ゾーンで未加硫ゴムホー
スの成形時に、過度の吸熱がない程度の充分な高
温度に、マンドレルを保持しうるよう連続的サイ
クルにより行なうことを特徴とするゴムホースの
加硫方法。1 Insert an unvulcanized rubber hose into a preheated molding mandrel to avoid heat absorption during molding.
A method of vulcanization in hot air at normal pressure, in which a molding mandrel is used to create a vulcanization zone where the rubber hose is vulcanized by hot air at normal pressure, and a vulcanization zone where the vulcanized rubber hose is removed and an unvulcanized rubber hose is inserted into the outside air. The rubber hose vulcanization is carried out in a continuous cycle so that the mandrel can be kept at a sufficiently high temperature without excessive heat absorption during molding of the unvulcanized rubber hose in the outside air zone while circulating between the two zones. Sulfur method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15819086A JPS6313717A (en) | 1986-07-05 | 1986-07-05 | Method and equipment for vulcanizing rubber hose |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15819086A JPS6313717A (en) | 1986-07-05 | 1986-07-05 | Method and equipment for vulcanizing rubber hose |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6313717A JPS6313717A (en) | 1988-01-21 |
| JPH0519885B2 true JPH0519885B2 (en) | 1993-03-18 |
Family
ID=15666231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15819086A Granted JPS6313717A (en) | 1986-07-05 | 1986-07-05 | Method and equipment for vulcanizing rubber hose |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6313717A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0637059B2 (en) * | 1989-11-10 | 1994-05-18 | 帝都ゴム株式会社 | Rubber hose vulcanizer |
| ES2048064B1 (en) * | 1991-10-11 | 1996-11-01 | Vincke S A | PROCEDURE FOR THE MANUFACTURE OF RUBBER TUBES WITH CURVED AND STRAIGHT SECTIONS. |
| JPH0761652B2 (en) * | 1993-11-09 | 1995-07-05 | 帝都ゴム株式会社 | Rubber hose vulcanization method |
| KR100609469B1 (en) | 2004-12-10 | 2006-08-08 | 주식회사 화승알앤에이 | A vulcanization apparatus of the rubber |
| JP2008238620A (en) * | 2007-03-28 | 2008-10-09 | Toyoda Gosei Co Ltd | Method for vulcanizing hose formed in bent shape |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59201839A (en) * | 1983-04-30 | 1984-11-15 | Toyoda Gosei Co Ltd | Vulcanization of rubber hose |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5983523U (en) * | 1982-11-29 | 1984-06-06 | 鬼怒川ゴム工業株式会社 | Structure of the end of the hose mandrel |
-
1986
- 1986-07-05 JP JP15819086A patent/JPS6313717A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59201839A (en) * | 1983-04-30 | 1984-11-15 | Toyoda Gosei Co Ltd | Vulcanization of rubber hose |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6313717A (en) | 1988-01-21 |
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