JPH0413137B2 - - Google Patents
Info
- Publication number
- JPH0413137B2 JPH0413137B2 JP61266732A JP26673286A JPH0413137B2 JP H0413137 B2 JPH0413137 B2 JP H0413137B2 JP 61266732 A JP61266732 A JP 61266732A JP 26673286 A JP26673286 A JP 26673286A JP H0413137 B2 JPH0413137 B2 JP H0413137B2
- Authority
- JP
- Japan
- Prior art keywords
- sheet material
- elastic sheet
- polytetrafluoroethylene
- rubber
- covering tube
- 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 - Lifetime
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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
Landscapes
- Laminated Bodies (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、バタフライ弁等の弁に使用されるゴ
ムシートリング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 rubber sheet ring used in valves such as butterfly valves.
（従来の技術）
一般にバタフライ弁は、第４図に示すように弁
軸１を回転操作することによつてバタフライ弁体
２が流路筒３内で動作され、そのバタフライ弁体
２が流路筒３内面の弁座４，４内を閉鎖する位置
に回動されることによつてゴムシートリング５が
各弁座４，４に当接して流路筒３内が遮断される
ものである。(Prior Art) In general, in a butterfly valve, as shown in FIG. When the cylinder 3 is rotated to a position where the valve seats 4, 4 on the inner surface thereof are closed, the rubber seat ring 5 comes into contact with each valve seat 4, 4, and the inside of the flow path cylinder 3 is shut off. .
従来、このバタフライ弁に使用されるゴムシー
トリング５は、流路筒３を密に遮断するものであ
り、またゴムの弾性と相まつてバタフライ弁閉鎖
時の衝撃を緩和するものであるが、ゴム自身の摩
擦係数が大きいためバタフライ弁の開閉時には多
大な開閉力を必要としていた。 Conventionally, the rubber seat ring 5 used in this butterfly valve tightly blocks the flow path tube 3 and, together with the elasticity of rubber, cushions the impact when the butterfly valve is closed. Since the butterfly valve itself has a large coefficient of friction, a large amount of opening and closing force is required when opening and closing the butterfly valve.
このゴムシートリング５の摩擦係数を小さくし
て耐摩耗性、耐薬品性及び耐熱性等を向上させる
ために、第５図に示す如くポリテトラフルオルエ
チレンからなる被膜６をゴムシートリング５の外
周に塗布してコーテイングした弁用ゴムシートリ
ングが知られている。 In order to reduce the coefficient of friction of the rubber seat ring 5 and improve its abrasion resistance, chemical resistance, heat resistance, etc., a coating 6 made of polytetrafluoroethylene is applied to the rubber seat ring 5 as shown in FIG. A rubber seat ring for a valve whose outer periphery is coated is known.
（発明が解決しようとする問題点）
しかしながら、このような従来の弁用ゴムシー
トリングの製造にあつては、ポリテトラフルオル
エチレン被覆６の塗布回数が少ないとポリテトラ
フルオルエチレン被膜６の厚みが薄く充分な耐久
性が得られなかつた。(Problems to be Solved by the Invention) However, in manufacturing such conventional valve rubber seat rings, if the number of times the polytetrafluoroethylene coating 6 is applied is small, the polytetrafluoroethylene coating 6 may deteriorate. It was too thin to provide sufficient durability.
また、充分な耐久性を得るために、ポリテトラ
フルオルエチレン被膜６の塗布回数を増加させて
ポリテトラフルオルエチレン被膜６の厚みを厚く
すると、ポリテトラフルオルエチレン被膜６の厚
みは均一にならずバラツキが生じるという製造上
の問題点があつた。 In addition, in order to obtain sufficient durability, the thickness of the polytetrafluoroethylene film 6 can be made uniform by increasing the number of applications of the polytetrafluoroethylene film 6 and increasing the thickness of the polytetrafluoroethylene film 6. However, there was a manufacturing problem in that variations occurred.
本発明はこのような従来の問題点に鑑み、厚い
ポリテトラフルオルエチレン被膜が得られ、しか
も厚みが均一な弁用ゴムシートリングの製造方法
の提供を目的としたものである。 In view of these conventional problems, it is an object of the present invention to provide a method for manufacturing a rubber seat ring for a valve, which allows a thick polytetrafluoroethylene coating to be obtained and which has a uniform thickness.
（問題点を解決するための手段）
上述の如き従来の問題点を解決し、所期の目的
を達成するための本発明の要旨とする構成は、断
面が円形の棒状をしたゴム材からなる弾性シート
材と、該弾性シート材の外径より稍小さい内径の
ポリテトラフルオルエチレン製の外面被覆チユー
ブとを別々に成形し、前記弾性シート材を長手方
向に引張して該弾性シート材の外径を前記外面被
覆チユーブの内径より小さくなるまで縮径させ、
その状態で該弾性シート材に前記外面被覆チユー
ブを嵌め合せ、その後前記引張を解き、前記弾性
シート材及び外面被覆チユーブのそれぞれの両端
間を連結してリング状となすことを特徴としてな
る弁用ゴムシートリングの製造方法に存する。(Means for Solving the Problems) The gist of the present invention for solving the above-mentioned conventional problems and achieving the intended purpose is made of a rod-shaped rubber material with a circular cross section. An elastic sheet material and an outer covering tube made of polytetrafluoroethylene having an inner diameter slightly smaller than the outer diameter of the elastic sheet material are separately molded, and the elastic sheet material is stretched in the longitudinal direction. reducing the outer diameter until it becomes smaller than the inner diameter of the outer covering tube;
In this state, the outer covering tube is fitted to the elastic sheet material, and then the tension is released, and both ends of the elastic sheet material and the outer covering tube are connected to form a ring shape. The invention consists in a method of manufacturing a rubber sheet ring.
（作用）
このように構成される弁用ゴムシートリングの
製造方法では、ゴムの有する弾性を利用して弾性
シート材を引張すれば、この弾性シート材の外径
は、ポリテトラフルオルエチレン製の外面被覆チ
ユーブの内径より小さくなる。(Function) In the manufacturing method of the rubber seat ring for valves configured as described above, if the elastic sheet material is pulled using the elasticity of rubber, the outer diameter of this elastic sheet material is equal to that of polytetrafluoroethylene. is smaller than the inner diameter of the externally coated tube.
この状態でゴム材からなる弾性シート材にポリ
テトラフルオルエチレン製の外面被覆チユーブを
嵌め合せた後、弾性シート材の引張を解くことに
より外面被覆チユーブ内で弾性シート材が膨み、
両者が密に嵌合される。 In this state, after fitting the outer covering tube made of polytetrafluoroethylene to the elastic sheet material made of rubber material, the elastic sheet material swells within the outer covering tube by releasing the tension on the elastic sheet material.
Both are tightly fitted.
（実施例）
次に本発明の実施の一例を第１図〜第３図につ
いて説明する。(Example) Next, an example of implementation of the present invention will be described with reference to FIGS. 1 to 3.
まず、断面が円形の棒状をした天然ゴムまたは
合成ゴムからなる弾性シート材１０と、この弾性
シート材１０の外径より稍小さい内径のポリテト
ラフルオルエチレン製の外面被覆チユーブ２０と
を別々に成形する。 First, an elastic sheet material 10 made of natural rubber or synthetic rubber and having a rod shape with a circular cross section, and an outer covering tube 20 made of polytetrafluoroethylene and having an inner diameter slightly smaller than the outer diameter of this elastic sheet material 10 are separately separated. Shape.
この弾性シート材１０は第１図に示すように、
その一例として弾性シート材成形時に、その両端
に引張用の埋込金具１１，１１をあらかじめ埋設
しておく。この埋込金具１１，１１にはそれぞれ
リング部１２を有するロツト１３を螺着する。 As shown in FIG. 1, this elastic sheet material 10 has
For example, when molding an elastic sheet material, tension embedding fittings 11, 11 are embedded in advance at both ends of the elastic sheet material. A rod 13 having a ring portion 12 is screwed into each of the embedded fittings 11, 11.
また、ポリテトラフルオルエチレン製の外面被
覆チユーブ２０は常法によりその厚さを均一に成
形しておく。 Further, the outer surface coating tube 20 made of polytetrafluoroethylene is molded to have a uniform thickness by a conventional method.
このように両端にロツト１３を螺着した埋設金
具１１を有する弾性シート材１０とポリテトラフ
ルオルエチレン製の外面被覆チユーブ２０とを第
２図に示すように、テーブル３０に所定の間隔を
もつて配置した一対の支圧板５０，５０間に位置
させ、前記弾性シート材１０の一方の端部に螺着
したリング部１２を一方の支圧板５０に有するフ
ツク５１に掛止させる。また、弾性シート材１０
の他方の端部に螺着したリング部１２は、外面被
覆チユーブ２０内を貫通する引張ロツト５２の一
端に掛止された引張ワイヤー５３に掛止すると共
に、その引張ロツト５２は他方の支圧板５０に設
けられた油圧シリンダー５４に連結する。 As shown in FIG. 2, the elastic sheet material 10 having the embedded fittings 11 with the rods 13 screwed onto both ends and the outer covering tube 20 made of polytetrafluoroethylene are placed on the table 30 at a predetermined interval. The ring portion 12 screwed onto one end of the elastic sheet material 10 is hooked to a hook 51 on one of the pressure plates 50. In addition, the elastic sheet material 10
The ring portion 12 screwed onto the other end of the tube is engaged with a tension wire 53 which is engaged with one end of a tension rod 52 passing through the outer covering tube 20, and the tension rod 52 is connected to the other bearing plate. It is connected to a hydraulic cylinder 54 provided at 50.
このようにして油圧シリンダー５４により弾性
シート材１０を長手方向に引張して、弾性シート
材１０の外径をポリテトラフルオルエチレン製の
外面被覆チユーブ２０の内径より小さくなくまで
縮径させる。 In this way, the elastic sheet material 10 is stretched in the longitudinal direction by the hydraulic cylinder 54, and the outer diameter of the elastic sheet material 10 is reduced to a value no smaller than the inner diameter of the outer surface coating tube 20 made of polytetrafluoroethylene.
この状態で弾性シート材１０に前記外面被覆チ
ユーブ２０を引張方向とは逆方向に移動させて弾
性シート材１０の周面に外面被覆チユーブ２０を
嵌め合せる。次に、油圧シリンダー５４により弾
性シート材１０の引張を解く。この弾性シート材
１０引張を解くことにより、弾性シート材１０の
外径はゴムの有する弾性により元の状態に戻るの
で密に弾性シート材１０の周面にポリテトラフル
オルエチレン製の外面被覆チユーブ２０が嵌め合
されるのである。 In this state, the outer surface covering tube 20 is moved to the elastic sheet material 10 in a direction opposite to the pulling direction, and the outer surface covering tube 20 is fitted onto the circumferential surface of the elastic sheet material 10. Next, the tension on the elastic sheet material 10 is released by the hydraulic cylinder 54. By releasing the tension on the elastic sheet material 10, the outer diameter of the elastic sheet material 10 returns to its original state due to the elasticity of the rubber, so that an outer surface coating tube made of polytetrafluoroethylene is tightly coated on the circumferential surface of the elastic sheet material 10. 20 are fitted together.
この外面被覆チユーブ２０が嵌め合わされた弾
性シート材の両端をカツター等の切断機械を用い
て、埋込金具１１が埋設された部分を除去する。
次に、外面被覆チユーブ２０が嵌め合わされた弾
性シート材１０の両端間に接着剤６０を塗布し
て、この両端間を第３図に示すように加熱器７０
により熱溶着してリング状に連結する。これによ
り、目的とする弁用ゴムシートリングが製造され
るのである。 Both ends of the elastic sheet material into which the outer surface coating tube 20 is fitted are removed using a cutting machine such as a cutter to remove the portion in which the embedding fitting 11 is embedded.
Next, an adhesive 60 is applied between both ends of the elastic sheet material 10 to which the outer covering tube 20 is fitted, and a heater 70 is applied between the ends as shown in FIG.
are heat welded and connected in a ring shape. In this way, the desired rubber seat ring for a valve is manufactured.
（発明の効果）
本発明の弁用ゴムシートリングの製造方法は、
上述の如く構成され、ゴムの有する弾性特性を利
用して弾性シート材を引張すれば、この弾性シー
ト材の外径は、ポリテトラフルオルエチレン製の
外面被覆チユーブの内径により小さくなるため、
容易に弾性シート材にポリテトラフルオルエチレ
ン製の外面被覆チユーブの嵌め合わせられると共
に、この弾性シート材の引張を解けばゴムの有す
る弾性特性により弾性シート材は、元の状態に戻
るので強固に弾性シート材の周面にポリテトラフ
ルオルエチレン製の外面被覆チユーブが嵌め合わ
され、その両端間を連結してリング状とすること
により弁用ゴムシートリングが簡単に製造でき、
しかもポリテトラフルオルエチレン製の外面被覆
チユーブの厚みは均一であるため、従来のポリテ
トラフルオルエチレン被膜の塗布により製造した
ものに較べ厚みが大きく、しかもそのバラツキの
ない弁用ゴムシートリングが製造される。(Effect of the invention) The method for manufacturing a valve rubber seat ring of the present invention includes:
If the elastic sheet material is constructed as described above and is stretched using the elastic properties of rubber, the outer diameter of the elastic sheet material will be smaller than the inner diameter of the outer surface covering tube made of polytetrafluoroethylene.
The outer covering tube made of polytetrafluoroethylene can be easily fitted to the elastic sheet material, and when the tension on the elastic sheet material is released, the elastic sheet material returns to its original state due to the elastic properties of rubber, making it strong. A rubber seat ring for a valve can be easily manufactured by fitting an outer covering tube made of polytetrafluoroethylene onto the circumferential surface of an elastic sheet material, and connecting both ends of the tube to form a ring shape.
Moreover, since the thickness of the outer surface coating tube made of polytetrafluoroethylene is uniform, the rubber seat ring for valves is thicker than those manufactured by applying a conventional polytetrafluoroethylene coating, and the valve rubber seat ring has no variation in thickness. Manufactured.
第１図は本発明方法に使用する弾性ゴムシート
材の横断面図、第２図は本発明方法に使用する装
置の概略断面図、第３図は本発明方法で実施され
る連結方法を説明するための概略断面図、第４図
は従来のバタフライ弁の縦断面図、第５図は第４
図に使用されているゴムシートリングの断面図で
ある。
１０……弾性シート材、１１……埋込金具、２
０……外面被覆チユーブ、３０……テーブル、５
０，５０……支圧板、５１……フツク、５２……
引張ロツト、５３……引張ワイヤー、５４……油
圧シリンダー。
Fig. 1 is a cross-sectional view of an elastic rubber sheet material used in the method of the present invention, Fig. 2 is a schematic sectional view of an apparatus used in the method of the present invention, and Fig. 3 explains the connection method carried out in the method of the present invention. Fig. 4 is a longitudinal sectional view of a conventional butterfly valve, and Fig. 5 is a schematic cross-sectional view of a conventional butterfly valve.
It is a sectional view of the rubber seat ring used in the figure. 10...Elastic sheet material, 11...Embedded metal fitting, 2
0... External coating tube, 30... Table, 5
0,50...Bearing plate, 51...Hook, 52...
Tension rod, 53...Tension wire, 54...Hydraulic cylinder.
Claims (1)
シート材と、該弾性シート材の外径より稍小さい
内径のポリテトラフルオルエチレン製の外面被覆
チユーブとを別々に成形し、前記弾性シート材を
長手方向に引張して該弾性シート材の外径を前記
外面被覆チユーブの内径より小さくなるまで縮径
させ、その状態で該弾性シート材に前記外面被覆
チユーブを嵌め合せ、その後前記引張を解き、前
記弾性シート材及び外面被覆チユーブのそれぞれ
の両端間を連結してリング状となすことを特徴と
してなる弁用ゴムシートリングの製造方法。1. An elastic sheet material made of a rubber material having a rod shape with a circular cross section and an outer covering tube made of polytetrafluoroethylene having an inner diameter slightly smaller than the outer diameter of the elastic sheet material are separately molded, and the elastic sheet material is is pulled in the longitudinal direction to reduce the outer diameter of the elastic sheet material until it becomes smaller than the inner diameter of the outer covering tube, and in this state, the outer covering tube is fitted to the elastic sheet material, and then the tension is released. A method of manufacturing a rubber seat ring for a valve, characterized in that both ends of the elastic sheet material and the outer surface covering tube are connected to form a ring shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61266732A JPS63120633A (en) | 1986-11-11 | 1986-11-11 | Manufacture of rubber seat ring for valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61266732A JPS63120633A (en) | 1986-11-11 | 1986-11-11 | Manufacture of rubber seat ring for valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63120633A JPS63120633A (en) | 1988-05-25 |
| JPH0413137B2 true JPH0413137B2 (en) | 1992-03-06 |
Family
ID=17434918
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61266732A Granted JPS63120633A (en) | 1986-11-11 | 1986-11-11 | Manufacture of rubber seat ring for valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63120633A (en) |
-
1986
- 1986-11-11 JP JP61266732A patent/JPS63120633A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63120633A (en) | 1988-05-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3750698A (en) | Coated valving member | |
| US3073336A (en) | Lined ball valve | |
| US4073465A (en) | Butterfly valve | |
| US4457491A (en) | Extreme-temperature sealing device and annular seal therefor | |
| US3241806A (en) | Disc valve having plastic layer on resilient seating surface | |
| US3350053A (en) | Controlling apparatus | |
| US5451064A (en) | Exhaust seal ring | |
| DE3516471A1 (en) | THROTTLE VALVE | |
| US3118649A (en) | Ball valve with a reinforced and deformable valve seat | |
| US3884447A (en) | Fluid valve means | |
| JPH0448989B2 (en) | ||
| EP0933573A3 (en) | Actuating device for a sanitary valve | |
| JPS58134280A (en) | Valve assembled body and valve seat | |
| GB1576370A (en) | Inner element for a flow regulator | |
| US4055323A (en) | Butterfly valve | |
| JPH0413137B2 (en) | ||
| US3235226A (en) | Valves | |
| US3698422A (en) | Lined plug valve | |
| US3104432A (en) | Blow tube and method of making same | |
| CA1327560C (en) | Pinch valve | |
| US6418659B1 (en) | Fishing lure skirt and method | |
| JPH04262177A (en) | Diaphragm valve | |
| US3420499A (en) | Valve | |
| US3976280A (en) | Animal-actuated watering valve | |
| EP1013979B1 (en) | Hose, for example for supply of air |