JPH09280379A - Knitting yarn for packing and packing - Google Patents
Knitting yarn for packing and packingInfo
- Publication number
- JPH09280379A JPH09280379A JP8118474A JP11847496A JPH09280379A JP H09280379 A JPH09280379 A JP H09280379A JP 8118474 A JP8118474 A JP 8118474A JP 11847496 A JP11847496 A JP 11847496A JP H09280379 A JPH09280379 A JP H09280379A
- Authority
- JP
- Japan
- Prior art keywords
- knitting yarn
- packing
- thickness
- tape
- knitting
- 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
- Sealing Devices (AREA)
- Knitting Of Fabric (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、流体機器の軸封部
などに用いられる、特に膨張黒鉛テープを用いたパッキ
ン用編み糸及び該編み糸から成るパッキンの改良に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a knitting yarn for packing, which is used for a shaft sealing portion of a fluid device, in particular, an expanded graphite tape, and an improvement of a packing made of the knitting yarn.
【0002】[0002]
【従来の技術】従来のパッキン用編み糸及びこの編み糸
で編組したパッキンとしては、下記のようなものがあ
る。 (i)例えば、特開平4−25671号に開示されてい
るように、膨張黒鉛テープをその長手方向に山折り、谷
折りして、その外周全体を補強材で被覆していた。 (ii)例えば、特開昭63−1863号に開示されてい
るように、5mm幅以下に切断した膨張黒鉛テープを複
数枚積層して、積層体の表面をニット編み又は袋編みし
ていた。 (iii)例えば、特開平6−74346号に開示されて
いるように、5mm幅以上に切断した膨張黒鉛テープ
を、補強繊維で被覆し、これを2つ折りしていた。2. Description of the Related Art As a conventional packing knitting yarn and packing knitted with this knitting yarn, there are the followings. (I) For example, as disclosed in JP-A-4-25671, an expanded graphite tape is mountain-folded and valley-folded in the longitudinal direction, and the entire outer periphery thereof is covered with a reinforcing material. (Ii) For example, as disclosed in JP-A-63-1863, a plurality of expanded graphite tapes cut to a width of 5 mm or less were laminated, and the surface of the laminate was knitted or bag knitted. (Iii) For example, as disclosed in JP-A-6-74346, an expanded graphite tape cut into a piece having a width of 5 mm or more was covered with reinforcing fibers and folded in two.
【0003】従来、繊維質のブレード(被覆)パッキン
を構成する編み糸は、糸径が0.8又は1.6mmで、
その断面積が0.5mm2と2mm2であった。そしてこ
の編み糸の断面形状は丸形が最も望ましく、それに近い
矩形がこれに次ぐものとしていた。しかるに上記編み糸
として膨張黒鉛テープを使用しようとすると、この膨張
黒鉛テープではその断面積を2mm2以下にしようとし
ても、強度が小さく、脆くて折れ易いため、所要の編み
糸に加工する作業が困難であった。Conventionally, a knitting yarn which constitutes a fibrous blade (cover) packing has a yarn diameter of 0.8 or 1.6 mm,
The cross-sectional areas were 0.5 mm 2 and 2 mm 2 . The cross-sectional shape of this knitting yarn is most preferably round, and a rectangle close to it is next. However, if an expanded graphite tape is used as the knitting yarn, even if the expanded graphite tape is made to have a cross-sectional area of 2 mm 2 or less, the strength is small, the brittleness is liable to be broken, and thus the work for forming the required knitting yarn is required. It was difficult.
【0004】一方、膨張黒鉛テープを折り畳んだり、縮
らしたり、圧縮したりせずに、加工するために良好な作
業性を確保するためには、厚さと幅の比が1:3〜1:
25の間にあり、断面積が4mm2以下のもの、特に
1:3〜1:15の範囲内にあり、そのテープの断面積
が1.5〜3.5mm2の範囲内にあることが望まし
い。On the other hand, in order to ensure good workability for processing the expanded graphite tape without folding, shrinking or compressing it, the thickness-width ratio is 1: 3 to 1: 1.
Between 25 and having a cross-sectional area of 4 mm 2 or less, especially in the range of 1: 3 to 1:15, and the cross-sectional area of the tape being in the range of 1.5 to 3.5 mm 2. desirable.
【0005】[0005]
【発明が解決しようとする課題】而して前記従来例
(i)においては、膨張黒鉛テープは脆くて強度が弱い
ため、テープをその長手方向に折り曲げ加工すると、破
断や、剥離するなど編み糸加工の作業が困難である。ま
た前記従来例(ii)では、5mm幅以下に切断すると、
同じく破断を生じ易く、複数枚積層して、その積層テー
プを補強繊維で被覆しても、テープが作業中に切断して
抜けたり、層間のすべりが生じるので、編組加工が困難
である。更に、前記従来例(iii)のように、5mm幅
以上の膨張黒鉛テープを補強繊維で被覆してから2つ折
りにする場合、膨張黒鉛は強度が弱く、脆い材料として
処理しにくいことは(i),(ii)の従来例と同様で、
しかも2つ折りの工程を付加しなければならない。また
テープ幅を拡大すると、パッキンに編組した時、表面の
編み目が粗く、シール性質も低下する。更に、一般に従
来のパッキン用編み糸は、編組工程時にかかる張力によ
り繊維材からなる補強編み袋体の中で膨張黒鉛テープが
破断し、その密度がばらつく欠点がある。In the prior art example (i), the expanded graphite tape is brittle and weak in strength. Therefore, when the tape is bent in the longitudinal direction, the knitting yarn is broken or peeled off. Processing work is difficult. Further, in the above-mentioned conventional example (ii), when cut to a width of 5 mm or less
Similarly, breakage is likely to occur, and even if a plurality of laminated tapes are laminated and the laminated tapes are covered with reinforcing fibers, the tapes are cut off during the work and slippage occurs between the layers, so that the braiding process is difficult. Further, when the expanded graphite tape having a width of 5 mm or more is covered with the reinforcing fibers and folded in half as in the conventional example (iii), the expanded graphite has low strength and is difficult to process as a brittle material (i. ), (Ii) same as the conventional example,
Moreover, the process of folding in half must be added. Further, when the tape width is increased, when the tape is braided, the surface stitches are coarse and the sealing property is deteriorated. Further, generally, the conventional knitting yarn for packing has a defect that the expanded graphite tape is broken in the reinforcing knitted bag made of the fiber material due to the tension applied during the braiding process, and the density thereof varies.
【0006】本発明の目的はかかる従来例の欠点を改良
し、膨張黒鉛テープの折り曲げ加工、2次補強材等が不
要で、シール性も良好なパッキン用編み糸及び該編み糸
を用いたパッキンを提供することである。The object of the present invention is to improve the drawbacks of the prior art, to eliminate the need for bending of expanded graphite tape, secondary reinforcing material, etc., and to have good sealing properties. A knitting yarn for packing and a packing using the knitting yarn. Is to provide.
【0007】[0007]
【課題を解決するための手段】本発明のパッキン用編み
糸は上記目的を達成するため、単層で全体として平板状
をなしており、かつ厚さが0.38mm以上で、幅が厚
さの3〜25倍の範囲にある膨張黒鉛テープと、上記膨
張黒鉛テープの外周全体を被覆するニット編み又は編組
体によってなる補強材と、の複合構造で編み糸を形成し
たことを要旨とする。また本発明のパッキンは、上記構
成の編み糸で編組又は棒状成形物からなる中芯部材の外
周を該編み糸で袋編みするか、或いはこれら編組又は袋
編みしてひも状としたものをリング状に圧縮成形加工し
たことを要旨とする。In order to achieve the above object, the packing knitting yarn of the present invention has a flat plate shape as a whole as a single layer, and has a thickness of 0.38 mm or more and a width of The gist is that the knitting yarn is formed by a composite structure of the expanded graphite tape in the range of 3 to 25 times the above and a reinforcing material made of a knit knit or a braid covering the entire outer circumference of the expanded graphite tape. In the packing of the present invention, the outer periphery of a core member made of a braided or rod-shaped molded product with the above-described knitting yarn is bag-knitted with the knitting yarn, or these braided or bag-knitted cords are ring-shaped. The gist is that it is compression molded into a shape.
【0008】[0008]
【発明の実施の形態】本発明の実施の形態において、使
用される膨張黒鉛テープは単層で全体として平板状をな
しており、従来例のように2つ折り又はそれ以上に折り
曲げたりすることも、積層することも不要としている。
そして上記テープの厚さが0.38mm以上で、幅が厚
さの3〜25倍の範囲にあるように設定したので、編組
加工時に破断しない強度が得られ、また編み糸として必
要以上に断面積が大きくならない(糸が太くならな
い)。BEST MODE FOR CARRYING OUT THE INVENTION In the embodiment of the present invention, the expanded graphite tape used is a single layer and has a flat plate shape as a whole, and may be folded in two or more as in the conventional example. It is not necessary to stack them.
Since the tape has a thickness of 0.38 mm or more and a width in the range of 3 to 25 times the thickness, a strength that does not break during braiding is obtained, and the tape is cut more than necessary as a knitting yarn. Area does not become large (thread does not become thick).
【0009】上記テープの表面の外周全体は、細金線、
金網、金属繊維及び糸、繊維等の補強材で、編組、ニッ
ト編み等で被覆して、パッキン用編み糸とする。この編
み糸を編組してひも状パッキンを得るか、又はリング状
に加工して成形する。なお、上記テープは折り畳んだ
り、長さ方向に縮らせたものではないが、波形成形加工
を施してもよい。The entire outer periphery of the surface of the tape is a fine gold wire,
A braid, a knit, or the like is covered with a reinforcing material such as a wire net, metal fibers and threads, or fibers to obtain a packing knitting thread. This braiding thread is braided to obtain a string-like packing, or processed into a ring shape and formed. Although the tape is not folded or shrunk in the length direction, it may be corrugated.
【0010】[0010]
【実施例】以下図面に示す本発明の実施例を説明する。
図1は本発明のパッキン用編み糸の一実施例を示す。同
図において、1は単層で全体として平板状をなしている
可撓性黒鉛テープで、該テープの外周全体は補強繊維2
から成る編み糸3で被覆されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention shown in the drawings will be described below.
FIG. 1 shows one embodiment of the packing yarn of the present invention. In the figure, 1 is a flexible graphite tape which is a single layer and has a flat plate shape as a whole, and the entire outer periphery of the tape is a reinforcing fiber 2
It is covered with a knitting yarn 3 consisting of.
【0011】テープ1としては、例えば、厚さa=0.
76mm、幅b=3.5mmにスリット加工したものが
用いられ、その場合、厚さと幅の比b/a=4.6で、
テープ断面積は2.7mm2である。The tape 1 has a thickness a = 0.
76 mm, width b = 3.5 mm, slit processing is used, in that case, with a ratio of thickness to width b / a = 4.6,
The tape cross-sectional area is 2.7 mm 2 .
【0012】補強繊維2としては、例えばステンレス鋼
SUS306−L材の0.08mm径の金属細線が用い
られ、これを16本で編み糸3として袋編みする。補強
繊維2としての金属細線は、耐熱性、耐食性のあるステ
ンレス鋼、インコネル又はモネル線が使用できる。As the reinforcing fiber 2, for example, a metal thin wire of stainless steel SUS306-L material having a diameter of 0.08 mm is used, and 16 pieces of this are knitted as a knitting thread 3 into a bag. As the metal fine wire as the reinforcing fiber 2, heat-resistant and corrosion-resistant stainless steel, Inconel or Monel wire can be used.
【0013】また耐熱性を要件されない用途には、銅、
真鍮、アルミ線等を使用してもよい。更に、線径はパッ
キンの切断性に影響するため、細いものがよいが、加工
後にパッキンを取り出す時の強度を確保するため、0.
05〜0.5mmが好適である。この他、テープ1とし
て、厚さa=0.5mm、幅b=5.2mm、テープ断
面積2.6mm2、b/a=10.4で、他の条件は上
述した通りとしたものでも、同様の効果がある。For applications where heat resistance is not required, copper,
You may use brass, aluminum wire, etc. Further, the wire diameter affects the cuttability of the packing, so a thin wire is preferable, but in order to secure the strength when taking out the packing after processing,
05-0.5 mm is suitable. In addition, as the tape 1, the thickness a = 0.5 mm, the width b = 5.2 mm, the tape cross-sectional area 2.6 mm 2 , b / a = 10.4, and the other conditions are as described above. , Has a similar effect.
【0014】図2〜図4は上記テープ1及び編み糸3を
用いたパッキンの例である。図2に示したものは、前記
編み糸3を用いて紐状に編組して紐状体5となし、軸封
用パッキンとしたものである。また、図3に示したもの
は、前記編み糸3を複数本集束し、ひねり加工して紐状
体6となし、軸封用パッキンとしたものである。2 to 4 show an example of packing using the tape 1 and the knitting yarn 3. The one shown in FIG. 2 is braided in the shape of a string using the knitting yarn 3 to form the string-like body 5, which is a packing for shaft sealing. Further, the one shown in FIG. 3 is one in which a plurality of the above-mentioned knitting yarns 3 are bundled and twisted to form a string-like body 6 and used as a shaft-sealing packing.
【0015】図4に示したものは、可撓性黒鉛粉末7、
黒鉛粉末8およびゴム材9にトルエンを加えて得た混練
物を棒状に押出し成形した棒状の中芯部材10を16本
の繊維2からなる編み糸3で袋編み被覆して紐状体11
となしたものである。なお、上記中芯部材としてプラス
チック成形物を用いてもよい。また上記紐状体を金型で
リング状に圧縮加工してパッキンを得るようにすること
もできる。As shown in FIG. 4, the flexible graphite powder 7,
A kneaded material obtained by adding toluene to graphite powder 8 and rubber material 9 is extruded and formed into a rod shape, and a rod-shaped core member 10 is knitted with a knitting yarn 3 made of 16 fibers 2 to cover it with a knitted cord 11
It is what was done. A plastic molded product may be used as the core member. It is also possible to obtain a packing by compressing the above-mentioned cord-like body into a ring shape with a mold.
【0016】[0016]
【発明の効果】以上説明したようなパッキン用編み糸を
用いることにより本発明によれば、下記のような実用上
優れた効果が得られる。 (イ)膨張黒鉛テープの折り曲げ加工が不要なため、少
なくとも一加工工程が省略でき生産性が向上するばかり
でなく、曲げ加工による材料の切断により生じる不良率
が低下し、コストダウンを図ることができる。 (ロ)テープの厚さが厚く、細幅に切断することが不要
で、強度大であるため、折れにくく、作業性及び取扱い
性が改善される。また強度が大きく、補強繊維による編
組速度を速くできる。 (ハ)編み糸が均質なものとなるため、編組したひも状
パッキンはその表面状態がきれいで、シール性は良好か
つ安定している。 (ニ)強度が大きくなったので、表面を被覆する補強材
以外の2次補強材は不要である。EFFECTS OF THE INVENTION By using the packing knitting yarn as described above, the present invention provides the following practically excellent effects. (A) Since bending of the expanded graphite tape is not necessary, at least one processing step can be omitted and not only productivity is improved, but also the defective rate caused by cutting of the material by bending processing is reduced and cost can be reduced. it can. (B) The tape is thick, does not need to be cut into narrow widths, and has high strength, so that it is difficult to break and workability and handleability are improved. Moreover, the strength is high, and the braiding speed of the reinforcing fibers can be increased. (C) Since the knitting yarn is uniform, the braided string-like packing has a clean surface, and the sealing property is good and stable. (D) Since the strength is increased, a secondary reinforcing material other than the reinforcing material for covering the surface is unnecessary.
【図1】本発明の一実施例を示す斜視図である。FIG. 1 is a perspective view showing an embodiment of the present invention.
【図2】本発明によるひも状パッキンの一例を示す図で
ある。FIG. 2 is a diagram showing an example of a string-like packing according to the present invention.
【図3】本発明によるひも状パッキンの他の例を示す図
である。FIG. 3 is a diagram showing another example of the string-like packing according to the present invention.
【図4】本発明によるひも状パッキンの更に他の例をを
示す図である。FIG. 4 is a view showing still another example of the string-like packing according to the present invention.
1 膨張黒鉛テープ 2 補強繊維 3 編み糸 1 Expanded graphite tape 2 Reinforcing fiber 3 Knitting yarn
Claims (3)
かつ厚さが0.38mm以上で、幅が厚さの3〜25倍
の範囲にある膨張黒鉛テープと、 上記膨張黒鉛テープの外周全体を被覆するニット編み又
は編組体によってなる補強材と、の複合構造で編み糸を
形成したことを特徴とするパッキン用編み糸。1. A single layer having a flat plate shape as a whole,
And an expanded graphite tape having a thickness of 0.38 mm or more and a width in the range of 3 to 25 times the thickness, and a reinforcing material made of a knitted or braided body covering the entire outer periphery of the expanded graphite tape. A knitting yarn for packing characterized in that the knitting yarn is formed in a composite structure.
かつ厚さが0.38mm以上で、幅が厚さの3〜25倍
の範囲にある膨張黒鉛テープと、 上記膨張黒鉛テープの外周全体を被覆するニット編み又
は編組体によってなる補強材と、の複合構造で編み糸を
形成し、この編み糸で編組又は棒状成形物からなる所定
の中芯部材の外周を該編み糸で袋編みしたことを特徴と
するひも状パッキン。2. A single layer, which has a flat plate shape as a whole,
And an expanded graphite tape having a thickness of 0.38 mm or more and a width in the range of 3 to 25 times the thickness, and a reinforcing material made of a knitted or braided body covering the entire outer periphery of the expanded graphite tape. A string-like packing characterized in that a knitting yarn is formed with a composite structure, and the knitting yarn is bag-knitted on the outer periphery of a predetermined core member made of a braided or rod-shaped molded product.
かつ厚さが0.38mm以上で、幅が厚さの3〜25倍
の範囲にある膨張黒鉛テープと、 上記膨張黒鉛テープの外周全体を被覆するニット編み又
は編組体によってなる補強材と、の複合構造で編み糸を
形成し、この編み糸で編組、又は所定の中芯部材の外周
を上記編み糸で袋編みしてひも状としたものを、リング
状に圧縮成形加工したことを特徴とするパッキン。3. A single layer having a flat plate shape as a whole,
And an expanded graphite tape having a thickness of 0.38 mm or more and a width in the range of 3 to 25 times the thickness, and a reinforcing material made of a knitted or braided body covering the entire outer periphery of the expanded graphite tape. A knitting yarn is formed with a composite structure, and a braided yarn with this knitting yarn or a bag-like knitting of the outer periphery of a predetermined core member with the above knitting yarn into a string shape is compression molded into a ring shape. Packing to be done.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP08118474A JP3084354B2 (en) | 1996-04-16 | 1996-04-16 | Knitting yarn and packing for packing |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP08118474A JP3084354B2 (en) | 1996-04-16 | 1996-04-16 | Knitting yarn and packing for packing |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH09280379A true JPH09280379A (en) | 1997-10-28 |
JP3084354B2 JP3084354B2 (en) | 2000-09-04 |
Family
ID=14737576
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP08118474A Expired - Lifetime JP3084354B2 (en) | 1996-04-16 | 1996-04-16 | Knitting yarn and packing for packing |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3084354B2 (en) |
Cited By (4)
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---|---|---|---|---|
WO2007058019A1 (en) * | 2005-11-16 | 2007-05-24 | Nippon Pillar Packing Co., Ltd. | Yarn and gland packing |
WO2007114443A1 (en) * | 2006-04-05 | 2007-10-11 | National Institute Of Advanced Industrial Science And Technology | Graphite clay composite, process for producing the same, gasket or packing based on the composite, and clay dispersion liquid used for the composite |
DE102007061580A1 (en) * | 2007-12-18 | 2009-06-25 | Obshestvo S Ogranichennoi Otvetstvennostiu "Ilma" | Sealing cord for sealing e.g. packing box chamber, has strip wrapped in spiral form and stretched in longitudinal direction, where spiral windings partially overlap in winding direction |
JP2011140743A (en) * | 2011-02-09 | 2011-07-21 | Nippon Pillar Packing Co Ltd | Knitting yarn made of expanded graphite |
-
1996
- 1996-04-16 JP JP08118474A patent/JP3084354B2/en not_active Expired - Lifetime
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2007058019A1 (en) * | 2005-11-16 | 2007-05-24 | Nippon Pillar Packing Co., Ltd. | Yarn and gland packing |
EP1967625B1 (en) | 2005-11-16 | 2018-04-18 | Nippon Pillar Packing Co., Ltd. | Yarn and gland packing |
WO2007114443A1 (en) * | 2006-04-05 | 2007-10-11 | National Institute Of Advanced Industrial Science And Technology | Graphite clay composite, process for producing the same, gasket or packing based on the composite, and clay dispersion liquid used for the composite |
JP2013052680A (en) * | 2006-04-05 | 2013-03-21 | National Institute Of Advanced Industrial Science & Technology | Graphite clay composite material, and gasket or packing formed of the same |
JP5212984B2 (en) * | 2006-04-05 | 2013-06-19 | 独立行政法人産業技術総合研究所 | Method for producing graphite clay composite |
US8647744B2 (en) | 2006-04-05 | 2014-02-11 | National Institute Of Advanced Industrial Science And Technology | Graphite clay composite material, process for producing the same, gasket or packing comprising the composite material, and clay dispersion used for the composite material |
DE102007061580A1 (en) * | 2007-12-18 | 2009-06-25 | Obshestvo S Ogranichennoi Otvetstvennostiu "Ilma" | Sealing cord for sealing e.g. packing box chamber, has strip wrapped in spiral form and stretched in longitudinal direction, where spiral windings partially overlap in winding direction |
JP2011140743A (en) * | 2011-02-09 | 2011-07-21 | Nippon Pillar Packing Co Ltd | Knitting yarn made of expanded graphite |
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