JPH07148860A - Manufacture of vibration absorbing pipe - Google Patents
Manufacture of vibration absorbing pipeInfo
- Publication number
- JPH07148860A JPH07148860A JP5330024A JP33002493A JPH07148860A JP H07148860 A JPH07148860 A JP H07148860A JP 5330024 A JP5330024 A JP 5330024A JP 33002493 A JP33002493 A JP 33002493A JP H07148860 A JPH07148860 A JP H07148860A
- Authority
- JP
- Japan
- Prior art keywords
- bellows
- rubber
- liquid rubber
- vibration absorbing
- pressure
- 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.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 229920001971 elastomer Polymers 0.000 claims abstract description 33
- 239000005060 rubber Substances 0.000 claims abstract description 33
- 239000007788 liquid Substances 0.000 claims abstract description 18
- 239000002184 metal Substances 0.000 claims abstract description 4
- 238000010521 absorption reaction Methods 0.000 claims description 7
- 238000013040 rubber vulcanization Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 2
- 239000004636 vulcanized rubber Substances 0.000 abstract 1
- 239000000853 adhesive Substances 0.000 description 9
- 230000001070 adhesive effect Effects 0.000 description 9
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 229920000459 Nitrile rubber Polymers 0.000 description 2
- 229920005549 butyl rubber Polymers 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 229920006311 Urethane elastomer Polymers 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000005987 sulfurization reaction Methods 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
Landscapes
- Joints Allowing Movement (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、冷媒回路および空圧
回路におけるコンプレッサや油圧回路におけるポンプな
どから発生する振動の伝播を抑制する振動吸収管の製造
方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a vibration absorbing tube for suppressing the propagation of vibration generated from a compressor in a refrigerant circuit and a pneumatic circuit, a pump in a hydraulic circuit and the like.
【０００２】[0002]
【従来の技術】従来の振動吸収管１は、図２の（ｃ）に
示すような、ベローズ２の外周部をゴム製のカバー３に
て覆った形態のものである。この従来の振動吸収管は、
図２（ａ）に示すような、中央に蛇腹部４を形成し、そ
の両端にストレート状の接続部５Ａ・５Ｂを形成した肉
厚約０．２ｍｍのステンレス鋼管によるベローズ２の外
周に、図２（ｂ）のような内面を該ベローズ２の外面と
同一に形成した加硫による別体のゴム製半割カバー３Ａ
・３Ｂを、接着剤により密封状に固定したものである。
この、半割カバー３Ａ・３Ｂは、ゴム加硫の金型成形に
て成形され、その接着に際しては蛇腹状の部分を除く接
合面に接着剤を塗布して振動吸収管１を製造していた。2. Description of the Related Art A conventional vibration absorbing tube 1 has a form in which an outer peripheral portion of a bellows 2 is covered with a rubber cover 3 as shown in FIG. 2 (c). This conventional vibration absorption tube
As shown in FIG. 2A, a bellows portion 4 is formed in the center, and straight connecting portions 5A and 5B are formed at both ends thereof. A separate rubber half-split cover 3A formed by vulcanization, the inner surface of which is the same as the outer surface of the bellows 2 as in 2 (b).
・ 3B is fixed in an airtight manner with an adhesive.
The half covers 3A and 3B are formed by molding a rubber vulcanization mold, and at the time of bonding, the vibration absorbing tube 1 is manufactured by applying an adhesive to the joint surface excluding the bellows-like portion. .
【０００３】[0003]
【発明が解決しようとする課題】上述した従来の振動吸
収管１は、２個のゴム製半割カバー３Ａ・３Ｂをベロー
ズ２の外周部に接着剤で張り合わせていたので、接着塗
布工程の作業性や接着剤の強度に対する信頼性（破壊圧
力、圧力サイクル性、耐熱性など）に難点があり、ま
た、同じ理由により振動吸収性能に方向性があるため、
十分な振動吸収性能を発揮させるためには配管する際に
取付け方向が制限され、さらには、薄肉のベローズは剛
性がなく寸法精度が安定しないため、あらかじめ型成形
で製作したゴム製半割カバーが被せにくく、組み付けの
作業性が悪いという問題があった。In the conventional vibration absorbing tube 1 described above, the two rubber half-split covers 3A and 3B are attached to the outer peripheral portion of the bellows 2 with an adhesive, so that the work of the adhesive applying step is performed. Reliability and reliability of adhesive strength (breaking pressure, pressure cycle property, heat resistance, etc.) are difficult, and for the same reason, vibration absorption performance is directional, so
In order to exert sufficient vibration absorption performance, the mounting direction is limited when piping, and the thin bellows does not have rigidity and the dimensional accuracy is not stable. There was a problem that it was difficult to cover and workability of assembly was poor.
【０００４】また、図示しないが、ベローズをインサー
トしてゴム加硫を行い、ベローズとゴム製カバーを一体
的に成形するという製造方法も考えられるが、一般的に
ゴム加硫の際には、金型内に数十〜数百ｋｇｆ／ｃｍ2
Ｇという非常に高いゴム圧力が発生するため、ベローズ
が押しつぶされてしまったり、仮に押しつぶされないよ
うに金型に芯金を入れたりすると金型構造が複雑にな
り、生産性が低下するという問題点があった。Although not shown, a manufacturing method in which a bellows is inserted and rubber vulcanization is performed to integrally mold the bellows and the rubber cover can be considered. Generally, in rubber vulcanization, Dozens to hundreds of kgf / cm 2 in the mold
Since a very high rubber pressure of G is generated, if the bellows is crushed, or if a cored bar is put in the mold to prevent it from being crushed, the mold structure becomes complicated and productivity decreases. There was a point.
【０００５】[0005]
【課題を解決するための手段】この発明は、上述のよう
な問題点を解決するためになされたもので、２個のゴム
製半割カバーを張り合わせるのではなく、ベローズ外周
に隙間を持たせて円筒状のスリーブを被せ、その隙間に
低い圧力で液状ゴムを注入し、その液状ゴムを硬化させ
るようにしたことを特徴とする振動吸収管の製造方法で
ある。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems and has a gap in the outer circumference of a bellows instead of attaching two rubber half-split covers. Then, the cylindrical sleeve is covered, and the liquid rubber is injected into the gap at a low pressure to cure the liquid rubber.
【０００５】すなわち、この発明は、薄肉金属を蛇腹状
に形成してなるベローズ２を垂直状に保持し、その外側
に、該ベローズ２の蛇腹部外径Ｄよりも大きな内径ｄを
有するゴム加硫によって形成された円筒状のスリーブ６
を配置し、ベローズ２の外周とスリーブ６の内周との間
に形成された充填空間７に、前記ベローズ２の耐圧力未
満の圧力にて液状ゴム８を注入し、その液状ゴムを硬化
させることを特徴とする振動吸収管の製造方法である。That is, according to the present invention, a bellows 2 formed of a thin metal in a bellows shape is held vertically, and a rubber member having an inner diameter d larger than a bellows portion outer diameter D of the bellows 2 is provided outside the bellows 2. Cylindrical sleeve 6 formed by sulfurization
The liquid rubber 8 is injected into the filling space 7 formed between the outer circumference of the bellows 2 and the inner circumference of the sleeve 6 at a pressure lower than the withstand pressure of the bellows 2 to cure the liquid rubber. This is a method for manufacturing a vibration absorbing tube.
【０００７】[0007]
【実施例】この発明の実施例を図１に基づいて説明す
る。なお、図１（ａ）に示すこの発明のベローズ２は、
図２（ａ）に示した従来のベローズと同一のため詳細な
説明は省く。図１（ｂ）に示す円筒状のスリーブ６は、
高温・高圧下でゴム加硫されるものであり、該円筒状の
スリーブ６は、前記ベローズ２の蛇腹部外径Ｄよりも大
きな内径ｄに形成されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIG. The bellows 2 of the present invention shown in FIG.
Since it is the same as the conventional bellows shown in FIG. 2A, detailed description thereof will be omitted. The cylindrical sleeve 6 shown in FIG.
Rubber is vulcanized under high temperature and high pressure, and the cylindrical sleeve 6 is formed with an inner diameter d larger than the outer diameter D of the bellows portion.
【０００８】次に、この発明に係る振動吸収管の製造手
順を以下に説明する。 図１（ｃ）に示すように、ベローズ２の両端のストレ
ート状の接続部５Ａ・５Ｂが挿入可能な孔１０を備え、
外周に凸状の堤１２を形成してなる円筒状の成形治具９
の該孔１０にベローズの接続部５Ａまたは５Ｂを挿入し
てベローズ２を垂直状に保持する。 次に、ベローズ２を被せるように、成形治具９の凸状
の堤１２の内側上面１１に円筒状のスリーブ６を垂直状
に載置する。 ベローズ２の外周とスリーブ６の内周との間に形成さ
れる充填空間７に、上方より液状ゴム８を無加圧状態
（大気圧：０ｋｇｆ／ｃｍ2 Ｇ）で注入する。 その後、液状ゴム８を常温にて硬化させ、さらに成形
治具９を取り外して図１（ｄ）に示すような振動吸収管
１を製造する。Next, the manufacturing procedure of the vibration absorbing tube according to the present invention will be described below. As shown in FIG. 1C, the bellows 2 is provided with holes 10 into which the straight connecting portions 5A and 5B can be inserted,
Cylindrical forming jig 9 formed by forming a convex bank 12 on the outer periphery
The bellows connecting portion 5A or 5B is inserted into the hole 10 to hold the bellows 2 vertically. Next, the cylindrical sleeve 6 is vertically mounted on the inner upper surface 11 of the convex bank 12 of the molding jig 9 so as to cover the bellows 2. Liquid rubber 8 is injected into the filling space 7 formed between the outer circumference of the bellows 2 and the inner circumference of the sleeve 6 from above without pressure (atmospheric pressure: 0 kgf / cm 2 G). Then, the liquid rubber 8 is cured at room temperature, and the molding jig 9 is removed to manufacture the vibration absorbing tube 1 as shown in FIG.
【０００９】前記液状ゴム８は、室温・無加圧状態でも
極めて流動性が高いため、ゴム注入時に未加硫ゴムのよ
うに高温・高圧状態（例えば、１６０℃、数百ｋｇｆ／
ｃｍ2 Ｇ）で金型内にゴムを圧入し加硫するのではな
く、室温・無加圧状態のままでゴムの注入が可能となる
ためベローズ２にダメージ・変形を与えない。なお、充
填空間７の寸法や注入作業時間短縮等の制約条件によっ
ては、注入時の温度を例えば２０℃→５０℃に上げた
り、また、液状ゴム８の硬化に際しては例えば、大気圧
→真空または２ｋｇｆ／ｃｍ2 Ｇと室内の圧力を調整し
ても構わない。Since the liquid rubber 8 has extremely high fluidity even at room temperature and under no pressure, it is in a high temperature and high pressure state (for example, 160 ° C., several hundred kgf /) like unvulcanized rubber at the time of rubber injection.
Since the rubber can be injected at room temperature and under no pressure, rather than vulcanizing the rubber by press-fitting it into the mold with cm 2 G), the bellows 2 is not damaged or deformed. Depending on the dimensions of the filling space 7 and constraints such as shortening of the injection work time, the temperature at the time of injection may be increased from 20 ° C. to 50 ° C., and when the liquid rubber 8 is cured, for example, atmospheric pressure → vacuum or The pressure in the room may be adjusted to 2 kgf / cm 2 G.
【００１０】さらに、液状ゴム８とスリーブ６のゴム材
料としてＮＢＲ（アクレロニトリルブタジエンゴム）、
ＩＩＲ（ブチルゴム）やウレタンゴム系などの接着性の
良い材質を採用することにより、液状ゴム８の硬化の際
に接着剤を使用せずにスリーブ６との接着強度を向上さ
せることも可能となる。したがって、この発明の製造方
法は、従来の技術のような接着剤による接合が無いた
め、接着強度の信頼性が向上すると共に振動吸収性能の
方向性も無くなる。Further, NBR (acrylonitrile butadiene rubber) is used as a rubber material for the liquid rubber 8 and the sleeve 6.
By using a material having good adhesiveness such as IIR (butyl rubber) or urethane rubber, it is possible to improve the adhesive strength with the sleeve 6 without using an adhesive when the liquid rubber 8 is cured. . Therefore, in the manufacturing method of the present invention, since there is no bonding with an adhesive unlike the prior art, the reliability of the adhesive strength is improved and the direction of the vibration absorption performance is also eliminated.
【００１１】[0011]
【発明の効果】この発明の振動吸収管の製造方法は、薄
肉金属性のベローズが押しつぶされないようにするため
に、ベローズ２の外周に隙間７を持たせて円筒状のスリ
ーブ６を被せ、その隙間７に低い圧力で液状ゴム８を注
入して振動吸収管を製造するという方法のため、従来技
術と比較して組付けの作業性が大幅に向上し、コストダ
ウンになると同時に、振動吸収性能も向上するという産
業上極めて有効なものである。According to the method of manufacturing the vibration absorbing tube of the present invention, in order to prevent the thin metal bellows from being crushed, the bellows 2 is covered with the cylindrical sleeve 6 with a gap 7 between them. Since the method of manufacturing the vibration absorbing pipe by injecting the liquid rubber 8 into the gap 7 at a low pressure, the workability of the assembly is significantly improved as compared with the prior art, the cost is reduced, and at the same time, the vibration absorption is performed. It is extremely effective in the industry with improved performance.
【図１】 この発明の一実施例における振動吸収管の製
造手順を示す説明図。FIG. 1 is an explanatory view showing a manufacturing procedure of a vibration absorbing tube according to an embodiment of the present invention.
【図２】 従来の振動吸収管の製造手順を示す説明図。FIG. 2 is an explanatory view showing a manufacturing procedure of a conventional vibration absorbing tube.
１ 振動吸収管。 ２ ベローズ。
３ カバー。 ３Ａ、３Ｂ 半割カバー。 ３Ｂ 未加硫ゴム。
４ 蛇腹部。 ６ スリーブ。 ７ 充填空間。
８ 液状ゴム。 ９ 成形治具。 １０ 孔。
１１ 内側上面。 １２ 堤。1 Vibration absorption tube. 2 Bellows.
3 cover. 3A, 3B Half cover. 3B Unvulcanized rubber.
4 bellows. 6 sleeves. 7 filling space.
8 Liquid rubber. 9 Forming jig. 10 holes.
11 Inside upper surface. 12 embankments.
Claims (1)
ズ２を垂直状に保持し、その外側に、該ベローズ２の蛇
腹部外径Ｄよりも大きな内径ｄを有するゴム加硫によっ
て形成された円筒状のスリーブ６を配置し、ベローズ２
の外周とスリーブ６の内周との間に形成された充填空間
７に、前記ベローズ２の耐圧力未満の圧力にて液状ゴム
８を注入し、その液状ゴムを硬化させることを特徴とす
る振動吸収管の製造方法。1. A bellows 2 formed by forming a thin metal into a bellows shape is held vertically, and is formed on the outside by a rubber vulcanization having an inner diameter d larger than a bellows portion outer diameter D of the bellows 2. The cylindrical sleeve 6 is placed, and the bellows 2
The liquid rubber 8 is injected into the filling space 7 formed between the outer circumference of the bellows and the inner circumference of the sleeve 6 at a pressure lower than the withstand pressure of the bellows 2 to cure the liquid rubber. Absorption tube manufacturing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5330024A JP2747648B2 (en) | 1993-11-30 | 1993-11-30 | Manufacturing method of vibration absorption tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5330024A JP2747648B2 (en) | 1993-11-30 | 1993-11-30 | Manufacturing method of vibration absorption tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07148860A true JPH07148860A (en) | 1995-06-13 |
| JP2747648B2 JP2747648B2 (en) | 1998-05-06 |
Family
ID=18227928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5330024A Expired - Fee Related JP2747648B2 (en) | 1993-11-30 | 1993-11-30 | Manufacturing method of vibration absorption tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2747648B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008100489A (en) * | 2006-10-18 | 2008-05-01 | Showarasenkan Seisakusho Co Ltd | Manufacturing method for flexible vibration-isolating joint |
-
1993
- 1993-11-30 JP JP5330024A patent/JP2747648B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008100489A (en) * | 2006-10-18 | 2008-05-01 | Showarasenkan Seisakusho Co Ltd | Manufacturing method for flexible vibration-isolating joint |
| JP4645958B2 (en) * | 2006-10-18 | 2011-03-09 | 株式会社昭和螺旋管製作所 | Manufacturing method of flexible vibration-proof joint |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2747648B2 (en) | 1998-05-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |