JPH05149452A - Top-shape packing and its manufacture - Google Patents
Top-shape packing and its manufactureInfo
- Publication number
- JPH05149452A JPH05149452A JP34002491A JP34002491A JPH05149452A JP H05149452 A JPH05149452 A JP H05149452A JP 34002491 A JP34002491 A JP 34002491A JP 34002491 A JP34002491 A JP 34002491A JP H05149452 A JPH05149452 A JP H05149452A
- Authority
- JP
- Japan
- Prior art keywords
- resin
- rubber
- section
- packing
- shape
- 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
Landscapes
- Lift Valve (AREA)
- Sealing Devices (AREA)
Abstract
Description
【０００１】[0001]
【発明の産業上利用分野】本発明はコマパッキンおよび
その製造方法、さらに詳細には水の出水−停止などを制
御するために使用されるコマパッキンおよびその製造方
法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a top packing and a method for manufacturing the top packing, and more particularly to a top packing used for controlling water discharge-stop and the like and a method for manufacturing the top packing.
【０００２】[0002]
【従来技術および問題点】従来、コマパッキンは、図４
に示すようにあらかじめ成形した弁本体１の頂上部１１
に接着剤を塗布すると共に、未加硫ゴムをシール部２形
状に設け、加硫して製造していた。2. Description of the Related Art Conventionally, as shown in FIG.
The top 11 of the valve body 1 preformed as shown in FIG.
It was manufactured by applying an adhesive to the above and vulcanizing the unvulcanized rubber in the shape of the seal portion 2.
【０００３】このような方法でコマパッキンを製造する
場合、下記のような欠点がある。When the top packing is manufactured by such a method, there are the following drawbacks.
【０００４】ゴムの加硫温度は高いため、弁本体１の材
料として耐熱性のある、たとえばポリフェニルサルファ
イド、ポリアミドなど所謂エンジニアプラスチックを使
用する必要がある。Since the vulcanization temperature of rubber is high, it is necessary to use a so-called engineer plastic such as polyphenyl sulfide or polyamide having heat resistance as the material of the valve body 1.
【０００５】このようなエンジニアプラスチックは、高
価であると共に成形性に劣るばかりでなく、接着剤を使
用しても接着性が悪いという欠点がある。Such an engineered plastic is not only expensive and inferior in moldability, but also has a drawback that the adhesiveness is poor even if an adhesive is used.
【０００６】前述のようにゴム−樹脂を接着するために
は接着剤が必要であるが、使用される樹脂が接着性が悪
いため、ゴム−樹脂間の接着性が悪い。As described above, an adhesive is required to bond the rubber-resin, but since the resin used has poor adhesion, the adhesion between the rubber and resin is poor.
【０００７】接着剤が前記熱水、塩素などによっておか
され、前記シール部が脱落する恐れがある。The adhesive may be covered with the hot water, chlorine or the like, and the seal portion may fall off.
【０００８】また図５に示すように、金属製の弁本体１
にシール部２をねじ３によって止めるコアパッキンも周
知である。このようなコマパッキンの場合、ねじ止め工
程が必要であり、部品点数が多く、かつ弁本体１が金属
製のために軽量化が困難であり、かつ腐食しやすいとい
う欠点がある。Further, as shown in FIG. 5, the metal valve body 1
A core packing for fixing the seal portion 2 with the screw 3 is also known. In the case of such a top packing, there are disadvantages that a screwing step is required, the number of parts is large, and the valve body 1 is made of metal, so that it is difficult to reduce the weight and easily corrodes.
【０００９】[0009]
【発明の目的】本発明は上述の問題点に鑑みなされたも
のであり、耐熱性樹脂ばかりでなく、他の多くの種類の
樹脂を使用でき、かつ接着剤を使用せずともゴム−樹脂
間の接合性が良好なコマパッキンおよびその製造方法を
提供することを目的とするものである。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is possible to use not only heat-resistant resins but also many other types of resins, and to use rubber-resin interface without using an adhesive. It is an object of the present invention to provide a top packing having good bonding properties and a manufacturing method thereof.
【００１０】[0010]
【問題点を解決するための手段】上記問題点を解決する
ため、本発明によるコマパッキンは水をシールするため
のゴム製シール部と、このシール部に一体化された樹脂
製の弁本体よりなるコマパッキンにおいて、前記汎用樹
脂製の弁本体の頂上部に先端に鍔部を備えた嵌入突起を
設け、前記嵌入突起にゴム製シール部の中央に形成され
た嵌入部を前記鍔部に係合するように嵌入してなること
を特徴とするものである。In order to solve the above problems, the coma packing according to the present invention comprises a rubber seal portion for sealing water and a resin valve body integrated with the seal portion. In the top packing of the general-purpose resin, a fitting protrusion having a flange portion at the tip is provided at the top of the general-purpose resin valve body, and the fitting portion formed at the center of the rubber seal portion is engaged with the flange portion. It is characterized in that it is fitted so as to fit.
【００１１】また、本発明によるコマパッキンの製造方
法によれば、流動性のある樹脂が流れ込むための嵌入部
を穿設した所定形状のゴム製のシール部を形成する工
程、前記シール部の前記嵌入部に汎用樹脂が流入し、か
つ弁本体形状になるように樹脂を成形する工程を含むこ
とを特徴とするものである。Further, according to the method of manufacturing the top packing according to the present invention, the step of forming a rubber seal portion having a predetermined shape with a fitting portion into which a fluid resin flows is formed, It is characterized by including a step of molding the resin so that a general-purpose resin flows into the fitting portion and has a valve body shape.
【００１２】本発明によれば、従来と異なり、ゴム製の
シール部をあらかじめ形成しておき、前記シール部に形
成された嵌入部に樹脂を成形しながら流し込み、コマパ
ッキンを製造するため、樹脂に耐熱性が要求されること
はない。一方、ゴムは、一般に樹脂より耐熱性が高いば
かりでなく、樹脂の成形時に高温にさらされるのはせい
ぜい５〜２０秒であるため、熱ダメージを受ける心配が
ない。According to the present invention, unlike the prior art, the rubber seal portion is formed in advance, and the resin is poured into the fitting portion formed in the seal portion while molding the resin to manufacture the top packing. No heat resistance is required. On the other hand, rubber generally has higher heat resistance than resin, and since it is exposed to high temperature for 5 to 20 seconds at the time of molding of resin, there is no risk of thermal damage.
【００１３】[0013]
【発明の具体的説明】図１は本発明のコマパッキンの斜
視図、図２は前記コマパッキンの断面図であるが、この
図より明らかなように、弁本体１は汎用樹脂よりなり、
ゴム製のシール部２が設けられる弁頂上部１１とこの頂
上部１１に設けられた軸部１２とよりなっている。そし
て前記頂上部１１は図２より明らかなように、嵌入突起
１３が形成されており、前記嵌入突起１３の先端部には
その前周にわたって鍔部１４が形成されている。ゴム製
のシール部２はリング状になって、その中央部に嵌入部
２１を有しており、前記嵌入突起１３は前記嵌入部２１
に嵌入されて、鍔部１４に係合した状態になっている。
このため前記シール部２が抜脱するのが干渉される。DETAILED DESCRIPTION OF THE INVENTION FIG. 1 is a perspective view of a top packing of the present invention, and FIG. 2 is a sectional view of the top packing. As is clear from this figure, the valve body 1 is made of general-purpose resin,
It comprises a valve top portion 11 provided with a rubber seal portion 2 and a shaft portion 12 provided on the top portion 11. As is apparent from FIG. 2, the top portion 11 is formed with a fitting protrusion 13, and a flange portion 14 is formed at the tip of the fitting protrusion 13 over the front circumference thereof. The rubber seal part 2 has a ring shape, and has a fitting part 21 at the center thereof, and the fitting projection 13 has the fitting part 21.
Is engaged with the collar portion 14 and is in a state of being engaged with the collar portion 14.
For this reason, the removal of the seal portion 2 interferes.
【００１４】本発明によるコマパッキンを製造するに当
たっては、まず、頂上部１１および嵌入突起１３、鍔部
１４を形成するための空隙４１を有する下型４にあらか
じめ製造されたリング状のゴム製シール部２を設置す
る。この場合空隙４１とシール部２の外周間に若干のク
リアランスを設ける。In manufacturing the top packing according to the present invention, first, a ring-shaped rubber seal previously manufactured in the lower mold 4 having a cavity 41 for forming the top 11, the fitting projection 13 and the collar 14. Set up part 2. In this case, a slight clearance is provided between the gap 41 and the outer periphery of the seal portion 2.
【００１５】この様な下型４に弁軸１２に対応する空隙
５１を有する上型５を被せると共に、前記空隙５１に汎
用樹脂を流し込む。このように樹脂を流し込むと、樹脂
は空隙４１に流れ、前記シール部２の嵌入部２１を通っ
て流れ、鍔部、嵌入突起、頂上部を形成し、さらに上型
５の軸部を形成する。The lower die 4 is covered with the upper die 5 having a void 51 corresponding to the valve shaft 12, and a general-purpose resin is poured into the void 51. When the resin is poured in this way, the resin flows into the gap 41, flows through the fitting portion 21 of the seal portion 2, forms a collar portion, a fitting protrusion, and a top portion, and further forms a shaft portion of the upper die 5. .
【００１６】このとき樹脂は高温になっており、かつ圧
入されるため、前記シール部２の嵌入部２１は樹脂が通
過、ないし充填されるに際し、外側方向に押し広げられ
ることになる。このため、前述のように空隙４１とシー
ル部２の外周間にはクリアランスＬを設けるのがよい。
一方、樹脂が冷えて、硬化すると、シール部２は嵌入突
起１３方向に緊迫力が働くことになるため、いわば嵌入
突起１３にシール部２がたわめられた状態になる。この
ため、接着剤を使用しなくとも十分の接合強度を確保す
ることができる。At this time, the resin has a high temperature and is press-fitted, so that the fitting portion 21 of the seal portion 2 is pushed outward when the resin is passed through or filled. Therefore, as described above, it is preferable to provide the clearance L between the gap 41 and the outer periphery of the seal portion 2.
On the other hand, when the resin cools and hardens, the sealing portion 2 exerts a tension force in the direction of the fitting protrusion 13, so that the sealing portion 2 is flexed by the fitting protrusion 13. Therefore, sufficient bonding strength can be secured without using an adhesive.
【００１７】このようなコマパッキンを製造するための
ゴム材料としては、水を良好にシールすると共に、使用
される樹脂の軟化点において熱衝撃を受けないものが好
ましい。したがって、使用される樹脂の軟化点によって
ゴム材料は選択されることになるが、樹脂を成形すると
きの時間は５〜２０秒と極めて短時間（加硫時間に比較
すると）であるため、熱劣化・破壊を受ける恐れが少な
く、広範なゴム材料を選択可能である。一般に、このよ
うなゴム材料としては、天然ゴム、ニトリル系ゴム、フ
ッ素系ゴム、EPDM、シリコーン系ゴムなどを挙げること
ができる。As a rubber material for manufacturing such a top packing, a rubber material that seals water well and is not subject to thermal shock at the softening point of the resin used is preferable. Therefore, the rubber material is selected depending on the softening point of the resin used, but the time for molding the resin is 5 to 20 seconds, which is an extremely short time (compared to the vulcanization time). A wide range of rubber materials can be selected with little risk of deterioration and destruction. Generally, examples of such a rubber material include natural rubber, nitrile rubber, fluorine rubber, EPDM, and silicone rubber.
【００１８】このような樹脂は、本発明において限定さ
れるものではない。従来のようにゴムを樹脂の成形後に
加硫する場合には、加硫温度が高く、また時間が長いこ
とと相俟って、樹脂は耐熱性が要求されるが、本発明に
よる製造方法によれば、既にシール部は加硫されている
ため、耐熱性は必要とされない。このため、従来、この
ようなゴム−樹脂複合品（たとえばコマパッキン）に使
用するのが困難であった汎用樹脂、たとえばポリエチレ
ン、ポリプロピレンなども、水に侵されることはないた
め有効に使用できる。また、従来ゴム−樹脂複合品の樹
脂として使用されているエンジニアプラスチック、たと
えばアセタール樹脂、ナイロン樹脂、ポリカーボネート
樹脂、ポリフェニレンサルファイド樹脂などにも使用で
きるのは明らかである。Such a resin is not limited in the present invention. When the rubber is vulcanized after molding the resin as in the conventional case, the resin is required to have heat resistance in combination with a high vulcanization temperature and a long time, but in the production method of the present invention, According to this, since the seal portion has already been vulcanized, heat resistance is not required. Therefore, general-purpose resins, such as polyethylene and polypropylene, which have hitherto been difficult to use for such a rubber-resin composite product (for example, coma packing), can be effectively used because they are not affected by water. Further, it is obvious that it can also be used for engineering plastics conventionally used as resins for rubber-resin composite products, such as acetal resin, nylon resin, polycarbonate resin, polyphenylene sulfide resin and the like.
【００１９】これらの樹脂としては、無機質、炭素繊
維、無機繊維などの補強材を含むものであってもよい。These resins may contain a reinforcing material such as an inorganic material, carbon fiber or inorganic fiber.
【００２０】[0020]
【実施例】図１、図２に示すような形状のシール部（寸
法 外径１５ｍｍφ、内径４ｍｍφ）をＥＰＤＭで製造
した。これを図３に示すような金型に設置し、ポリフェ
ニレンサルファイド樹脂（ガラス繊維４０％）を流し込
むと共に、樹脂部分を成形した。成形時間は２２秒であ
った。前記鍔部の径は７ｍｍφ、頂上部は１５ｍｍφ、
軸部は５ｍｍφであった。EXAMPLE A seal portion (having an outer diameter of 15 mmφ and an inner diameter of 4 mmφ) having a shape as shown in FIGS. 1 and 2 was manufactured by EPDM. This was placed in a mold as shown in FIG. 3, a polyphenylene sulfide resin (40% of glass fiber) was poured, and a resin portion was molded. The molding time was 22 seconds. The diameter of the collar portion is 7 mmφ, the top is 15 mmφ,
The shaft portion was 5 mmφ.
【図１】本発明によるコマパッキンの斜視図。FIG. 1 is a perspective view of a top packing according to the present invention.
【図２】上記コマパッキンの断面図。FIG. 2 is a sectional view of the top packing.
【図３】本発明のコマパッキンの製造方法を示す断面
図。FIG. 3 is a cross-sectional view showing the method for manufacturing the top packing of the present invention.
【図４】従来のコマパッキンの断面図。FIG. 4 is a sectional view of a conventional top packing.
【図５】従来の他のコマパッキンの断面図。FIG. 5 is a cross-sectional view of another conventional piece packing.
１ 弁本体 １１ 頂上部 １２ 軸部 １３ 嵌入突起 １４ 鍔部 ２ シール部 ２１ 嵌入部 DESCRIPTION OF SYMBOLS 1 Valve body 11 Top part 12 Shaft part 13 Fitting protrusion 14 Collar part 2 Seal part 21 Fitting part
───────────────────────────────────────────────────── フロントページの続き (72)発明者 大沼 洋之 埼玉県大宮市三橋１−840 藤倉ゴム工業 株式会社大宮工場内 (72)発明者 神 雅彦 埼玉県大宮市三橋１−840 藤倉ゴム工業 株式会社大宮工場内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroyuki Onuma 1-840 Mitsuhashi, Omiya-shi, Saitama Fujikura Rubber Industry Co., Ltd. Omiya factory (72) Masahiko Shin God 1-840 Mitsuhashi, Omiya-shi, Saitama Fujikura Rubber Industry Co., Ltd. Omiya factory
Claims (2)
と、このシール部に一体化された樹脂製の弁本体よりな
るコマパッキンにおいて、前記汎用樹脂製の弁本体の頂
上部に先端に鍔部を備えた嵌入突起を設け、前記嵌入突
起にゴム製シール部の中央に形成された嵌入部を前記鍔
部に係合するように嵌入してなることを特徴とするコマ
パッキン。1. A coma packing comprising a rubber seal part for sealing water and a resin valve body integrated with the seal part, wherein a flange is provided at the tip of the top of the general purpose resin valve body. A top packing provided with a fitting protrusion having a portion, and a fitting portion formed at a center of a rubber seal portion is fitted into the fitting protrusion so as to engage with the flange portion.
部を穿設した所定形状のシール部を形成する工程、前記
シール部の前記嵌入部に汎用樹脂が流入し、かつ弁本体
形状になるように樹脂を成形する工程を含むことを特徴
とするコマパッキンの製造方法。2. A step of forming a seal part having a predetermined shape in which a fitting part for allowing a flowable resin to flow is formed; a general-purpose resin flows into the fitting part of the sealing part and has a valve body shape. And a step of molding a resin as described above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34002491A JP2951783B2 (en) | 1991-11-29 | 1991-11-29 | Top packing and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34002491A JP2951783B2 (en) | 1991-11-29 | 1991-11-29 | Top packing and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05149452A true JPH05149452A (en) | 1993-06-15 |
| JP2951783B2 JP2951783B2 (en) | 1999-09-20 |
Family
ID=18333018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34002491A Expired - Fee Related JP2951783B2 (en) | 1991-11-29 | 1991-11-29 | Top packing and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2951783B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0651907U (en) * | 1992-12-17 | 1994-07-15 | エスエムシー株式会社 | Two-color molded valve body |
| JP2005331073A (en) * | 2004-05-21 | 2005-12-02 | Fuji Seiko Kk | Valve element and fluid cutoff valve |
-
1991
- 1991-11-29 JP JP34002491A patent/JP2951783B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0651907U (en) * | 1992-12-17 | 1994-07-15 | エスエムシー株式会社 | Two-color molded valve body |
| JP2005331073A (en) * | 2004-05-21 | 2005-12-02 | Fuji Seiko Kk | Valve element and fluid cutoff valve |
| JP4525969B2 (en) * | 2004-05-21 | 2010-08-18 | 富士精工株式会社 | Valve body and fluid shutoff valve |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2951783B2 (en) | 1999-09-20 |
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