JP6599681B2 - Packing - Google Patents
Packing Download PDFInfo
- Publication number
- JP6599681B2 JP6599681B2 JP2015150783A JP2015150783A JP6599681B2 JP 6599681 B2 JP6599681 B2 JP 6599681B2 JP 2015150783 A JP2015150783 A JP 2015150783A JP 2015150783 A JP2015150783 A JP 2015150783A JP 6599681 B2 JP6599681 B2 JP 6599681B2
- Authority
- JP
- Japan
- Prior art keywords
- packing
- base fabric
- tape
- base
- rubber
- 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.)
- Active
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L15/00—Compositions of rubber derivatives
- C08L15/005—Hydrogenated nitrile rubber
-
- 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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
-
- 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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D99/00—Subject matter not provided for in other groups of this subclass
- B29D99/0082—Producing articles in the form of closed loops, e.g. rings
- B29D99/0085—Producing articles in the form of closed loops, e.g. rings for sealing purposes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/24—Crosslinking, e.g. vulcanising, of macromolecules
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L1/00—Compositions of cellulose, modified cellulose or cellulose derivatives
- C08L1/02—Cellulose; Modified cellulose
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/12—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
- C08L77/10—Polyamides derived from aromatically bound amino and carboxyl groups of amino-carboxylic acids or of polyamines and polycarboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/02—Copolymers with acrylonitrile
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
- F16J9/12—Details
- F16J9/20—Rings with special cross-section; Oil-scraping rings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
- F16J9/28—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction of non-metals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/26—Sealing devices, e.g. packaging for pistons or pipe joints
- B29L2031/265—Packings, Gaskets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2309/00—Characterised by the use of homopolymers or copolymers of conjugated diene hydrocarbons
- C08J2309/02—Copolymers with acrylonitrile
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2315/00—Characterised by the use of rubber derivatives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2327/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
- C08J2327/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2327/12—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2401/00—Characterised by the use of cellulose, modified cellulose or cellulose derivatives
- C08J2401/02—Cellulose; Modified cellulose
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2477/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
- C08J2477/10—Polyamides derived from aromatically bound amino and carboxyl groups of amino carboxylic acids or of polyamines and polycarboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Medicinal Chemistry (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Actuator (AREA)
- Sealing Devices (AREA)
- Laminated Bodies (AREA)
- Woven Fabrics (AREA)
- Sealing Material Composition (AREA)
Description
本発明は、基材がゴム組成物に埋設された基布で成形された環状のパッキンに関し、特に、ピストンとシリンダーの間に配置される、断面が例えば略V字形状乃至U字状のパッキンに関する。環状のパッキングは、電力プラント、化学工業プラント、タイヤ工業、各種機器、装置の摺動部のシール等、広汎な産業分野において使用されている。 The present invention relates to an annular packing formed of a base fabric in which a base material is embedded in a rubber composition, and in particular, a packing having a substantially V-shaped or U-shaped cross section, for example, disposed between a piston and a cylinder. About. The annular packing is used in a wide range of industrial fields such as a power plant, a chemical industry plant, a tire industry, various devices, and seals of sliding parts of the apparatus.
従来、パッキンは石綿、綿、ガラスなどの繊維を編組してなるクロス材に、ゴム組成物を含浸させた複数のシートを積層し、所定形状に加硫成形したものが、産業機器、プラントなどの分野で使用されている。 Conventionally, packing is made by laminating a plurality of sheets impregnated with a rubber composition on a cloth material made of braided fibers of asbestos, cotton, glass, etc., and vulcanized and molded into a predetermined shape, such as industrial equipment, plants, etc. Used in the field.
綿やガラス繊維のクロス材を用いたパッキンは、高温蒸気に晒される環境下で使用する場合、高温蒸気に対する耐性に劣り、長期間使用し続けることができない。そのため、高温で蒸気に晒される環境下では、石綿のクロス材で補強したゴム層を積層して成形したパッキンが使用されていた。しかし石綿は人体に有害であるため、その使用は世界的に規制される傾向にあり、その代替製品の開発が望まれている。 Packing using a cloth material of cotton or glass fiber is inferior in resistance to high temperature steam when used in an environment exposed to high temperature steam, and cannot be used for a long time. Therefore, in an environment exposed to steam at a high temperature, a packing formed by laminating a rubber layer reinforced with an asbestos cloth material has been used. However, asbestos is harmful to the human body, so its use tends to be regulated worldwide, and the development of alternative products is desired.
また、カーボン繊維クロスを素材にとして用いると、耐熱性が良好となるが、カーボンクロスは剛直であり、所定形状への癖付けが困難であり、層間剥離が生じてしまうという問題点があった。 In addition, when carbon fiber cloth is used as a material, heat resistance is improved, but the carbon cloth is rigid, difficult to braze to a predetermined shape, and delamination occurs. .
また、綿布で補強されたニトリルゴム層を成形したパッキンの場合、耐熱性が低く高温では使用できない。また綿布で補強されたフッ素ゴム層を成形したパッキンの場合、耐熱性は改善するが、耐摩耗性に劣る。特に、これらのパッキンを水・グリコール系の作動油用に用いた場合には、耐摩耗性が低いため作動油の漏れが生じることがある。 Moreover, in the case of a packing formed with a nitrile rubber layer reinforced with a cotton cloth, the heat resistance is low and it cannot be used at high temperatures. Further, in the case of a packing formed with a fluorine rubber layer reinforced with a cotton cloth, the heat resistance is improved, but the wear resistance is inferior. In particular, when these packings are used for water / glycol hydraulic fluid, the hydraulic fluid may leak due to low wear resistance.
特許第4712486号公報(特許文献1)には、カーボンクロスを特定の方法で裁断したパッキン形成用テープを金型上に積層した後に、所定形状に容易に賦型して、加硫することでパッキンを製造する方法が開示されている。 In Japanese Patent No. 4712486 (Patent Document 1), after a packing forming tape obtained by cutting a carbon cloth by a specific method is laminated on a mold, it is easily shaped into a predetermined shape and vulcanized. A method of manufacturing a packing is disclosed.
また、特公昭42−20943号公報(特許文献2)には、木綿、レーヨン等の布に非硬化ゴムなどを含浸・被覆して、シートを螺旋巻きして円筒状に形成し、これを所定長さに切断して、円筒計の一方の円周端を内側に折り曲げてU字状に形成したパッキングリングが開示されている。 In Japanese Patent Publication No. 42-20943 (Patent Document 2), a cloth such as cotton and rayon is impregnated with a non-cured rubber, and the sheet is spirally wound to form a cylindrical shape. A packing ring is disclosed which is cut into a length and bent into one U-shape by bending one circumferential end of a cylinder meter inward.
さらに実開昭59−174456号公報(特許文献3)には、環状体のパッキンであって、その芯部がゴム状弾性材を含浸した繊維よりなり、芯部の外周部が樹脂材を含浸した基布よりなるものが開示されている。 Further, Japanese Utility Model Publication No. 59-174456 (Patent Document 3) discloses an annular packing having a core portion made of a fiber impregnated with a rubber-like elastic material, and an outer peripheral portion of the core portion impregnated with a resin material. What consists of the base fabric which was made is disclosed.
しかしながら、特許文献2や特許文献3に記載のパッキングリングでは、基布を構成するゴム組成物が汎用のゴムを用いているため、シール性、シール寿命に劣るとともに耐熱性に乏しく高熱・蒸気環境下での使用に適しないという問題点がある。
However, in the packing rings described in
本発明は、高温・蒸気環境下で使用ができ、耐摩耗性、シール性及びシール寿命に優れるとともに、石綿を用いた場合の環境汚染の問題を解消したパッキンを提供する。 The present invention provides a packing that can be used in a high-temperature / steam environment, is excellent in wear resistance, sealing performance, and sealing life, and that solves the problem of environmental contamination when using asbestos.
また本発明の実施形態では、パッキン形成用の基布に柔軟性を付与することで所望形状に予備成形を可能とする。そして予備成形後には成形圧力を解放しても復元力を小さくすることで成形形状を維持し、加硫後においては外観および物性に優れたパッキンを製造する方法を提供する。 Further, in the embodiment of the present invention, it is possible to preform the desired shape by imparting flexibility to the base fabric for forming the packing. Then, after the pre-molding, a method for producing a packing having excellent appearance and physical properties after vulcanization by maintaining the molded shape by reducing the restoring force even if the molding pressure is released is provided.
本発明は、ゴム組成物に基材が埋設されたテープ状の基布を成形、架橋して得られた環状のパッキンであって、前記ゴム組成物はゴム成分として水素化ニトリルゴムを60質量%以上含むパッキンに関する。 The present invention is an annular packing obtained by molding and cross-linking a tape-like base fabric in which a base material is embedded in a rubber composition, and the rubber composition contains 60 mass% of hydrogenated nitrile rubber as a rubber component. Pertaining to packing containing more than%.
ここで前記水素化ニトリルゴムは、アクリロニトリル含有量が25質量%〜50質量%の範囲が望ましい。そして架橋後の基布の伸率は、35〜60%の範囲において、パッキンの要求特性を効果的は発揮できる。また基布を構成する基材は、アラミッド繊維の縦糸と横糸よりなるすだれ織物またはアラミッド繊維の平織物で形成されていることが望ましい。 Here, the hydrogenated nitrile rubber preferably has an acrylonitrile content of 25% by mass to 50% by mass. And the elongation of the base fabric after crosslinking can effectively exhibit the required characteristics of the packing in the range of 35 to 60%. Moreover, it is desirable that the base material constituting the base fabric is formed of a weave fabric made of warp and weft yarns of aramid fibers or a plain fabric of aramid fibers.
本発明のパッキンは、複数のテープ状の基布の積層体で形成され、基材の糸は積層体間で相互に交差していることが望ましい。そしてパッキンの断面はV字状またはU字状であることが好ましい。 The packing of the present invention is preferably formed of a laminate of a plurality of tape-like base fabrics, and the base material yarns preferably cross each other between the laminates. The cross section of the packing is preferably V-shaped or U-shaped.
更に本発明は、環状の金型を用いてパッキンを製造する方法であって、
(a)基材に水素化ニトリルゴム組成物の溶液を含浸し、ゴム組成物に基材を埋設した基布を準備する工程、
(b)前記基布を所定の寸法でバイアスに裁断した複数のテープ状の基布を準備する工程、
(c)前記テープ状の基布を環状の金型の表面にその周方向に沿って全周に亘って順次配列する工程、
(d)前記テープ状の基布を金型方向に加圧して、前記テープ状の基布を相互に密着させて予備成形体を形成する工程、および
(e)前記予備成形体を加圧、加熱して架橋する工程
よりなるパッキンの製造方法に関する。
Furthermore, the present invention is a method for producing a packing using an annular mold,
(A) impregnating the base material with a hydrogenated nitrile rubber composition solution, and preparing a base fabric in which the base material is embedded in the rubber composition;
(B) a step of preparing a plurality of tape-shaped base fabrics obtained by cutting the base fabric into biases with a predetermined dimension;
(C) a step of sequentially arranging the tape-like base fabric on the surface of the annular mold along the entire circumference thereof;
(D) pressurizing the tape-shaped base fabric in the mold direction, and bringing the tape-shaped base fabric into close contact with each other to form a preform, and (e) pressurizing the preform. The present invention relates to a packing manufacturing method comprising a step of heating and crosslinking.
本発明のパッキンは、水素化ニトリルゴムを主体とするゴム組成物に基材を埋設して補強したため、基布の適度の柔軟性により成形性が改善され、さらに高温での耐熱性、耐蒸気性とともにシール性及びシール寿命が改善される。 Since the packing of the present invention is reinforced by embedding a base material in a rubber composition mainly composed of hydrogenated nitrile rubber, the moldability is improved by appropriate flexibility of the base fabric, and further, heat resistance and steam resistance at high temperatures. The sealability and seal life as well as the performance are improved.
本発明は、ゴム組成物に基布が埋設されたテープ状の基布を成形、架橋して得られた環状のパッキンであって、前記ゴム組成物は、ゴム成分として水素化ニトリルゴムを60質量%以上含む。 The present invention is an annular packing obtained by molding and crosslinking a tape-like base fabric in which the base fabric is embedded in a rubber composition, and the rubber composition contains 60 hydrogenated nitrile rubber as a rubber component. Contains at least mass%.
本発明のパッキンは、例えば、図1に示す油圧のピストンシリンダー1の断面図におい、複数の環状のパッキン4は、シリンダー2とピストン3の間に介在して配置される。図1においては、環状のパッキン4は、凹部アダプター5と凸部アダプター6の間に4個が、左右で合計16個が配置されている。本発明の環状のパッキンは、シリンダー中のピストンの作動時において、高温、高湿下で十分の耐久性を有するとともに、長い作動距離後においても高いシール性を維持する。
The packing of the present invention is, for example, in the sectional view of the
<パッキンの形状>
図2に、環状のパッキン41を直径方向に切断した断面形状を示す。パッキンの断面は略V字の形状を有しており、パッキンの外側に配置された外側基布4aとパッキンの内側に配置された内側基布4bの2枚の積層体で成形されている。
<Packing shape>
In FIG. 2, the cross-sectional shape which cut | disconnected the
前記基布を積層して成形される断面略V字状の環状のパッキン41は、例えば、内径R1が30mm〜500mm、高さhが2〜20mm、幅Wが5〜30mmで形成される。
The
パッキン41の断面形状は、図2に示す略V字状のほか、略U字状、略円形のものが使用できる。これらの断面形状のパッキンは対応する断面形状の成形金型の上にテープを成形し架橋することで製造される。本発明のパッキンの断面形状は特に限定されないが、成型金型の断面形状に対応して、例えば、図7に示されるように断面凸部付き三角形10A、図8に示されるように断面く字状10B、あるいは、図9に示されるように断面C字状(10C)などがある。
The cross-sectional shape of the
<基材>
本発明において基布はゴム組成物に基材を埋設して作製される。ここで基材は、すだれ織物、平織物、綾織物等の織物、編物、不織布等が使用できる。また厚織物(合糸、より糸を使用した厚めの織物)、朱子織物(少なくとも5本の縦糸と横糸を含む完全組織で、一完全中で同一の縦糸は1回だけ横糸と交錯し、横糸の飛び数は1以上である組織)も好適に使用できる。そして繊維は、アラミド、ポリエステル、ナイロン、レーヨン及び綿等の有機繊維のほか、カーボン繊維、ガラス繊維等の無機繊維も使用できる。特に、耐熱性能及びシール性能の観点からアラミド繊維が好適である。
<Base material>
In the present invention, the base fabric is produced by embedding a base material in a rubber composition. Here, the base material may be a woven fabric such as a sand woven fabric, a plain woven fabric, a twill woven fabric, a knitted fabric, a non-woven fabric, or the like. Also, thick fabrics (combined yarns, thick fabrics using twisted yarns), satin fabrics (a complete structure including at least 5 warp and weft yarns. A structure in which the number of jumps is 1 or more can also be suitably used. In addition to organic fibers such as aramid, polyester, nylon, rayon and cotton, inorganic fibers such as carbon fibers and glass fibers can be used as the fibers. In particular, an aramid fiber is suitable from the viewpoint of heat resistance performance and sealing performance.
図5は、すだれ織物の基材がゴム組成物に埋設された長尺の基布の概略図を示す。ここで、基材としての織物または編物にゴム組成物が含浸される前の厚みは、例えば0.2mm〜0.80mmであり、基材のゴム組成物に含浸される前の目付重量は、例えば100〜300g/m2である。 FIG. 5 is a schematic view of a long base fabric in which a base material of a braided fabric is embedded in a rubber composition. Here, the thickness before the rubber composition is impregnated into the woven fabric or the knitted fabric as the base material is, for example, 0.2 mm to 0.80 mm, and the weight per unit area before the base material rubber composition is impregnated is For example, it is 100 to 300 g / m 2 .
織物は縦と横のそれぞれ1cmの幅内に使用されている繊維の本数で示される織密度は、例えば3〜15本/cm、好ましくは4〜10本/cmが望ましい。すだれ織物の場合は、平坦で基材厚みが薄く、立体的で基材に厚みのあるバスケット織りと異なり織密度も小さく、織物にゴム組成物が含浸しやすく、ゴムと繊維との界面剥離が起こり難く、また成形されたパッキンの表面平滑性にも優れる。 The woven fabric has a woven density represented by the number of fibers used within a width of 1 cm in the vertical and horizontal directions, for example, 3 to 15 fibers / cm, preferably 4 to 10 fibers / cm. In the case of a weave fabric, flat and thin base material thickness, unlike a three-dimensional and thick basket weave, the weave density is small, the rubber composition is easily impregnated with the fabric, and the interfacial delamination between rubber and fibers It hardly occurs, and the molded packing has excellent surface smoothness.
本発明では、基材に細繊維を用いることで基布の柔軟性が維持され、基材にゴム組成物を含浸、付着させて得られる基布における基材とゴムとの剥離が生じ難く、所望のシール材への加工性に優れ、成形後のシール材の表面平滑性等に優れている。繊維径が大きすぎる場合、また織密度が高いものは、基布が剛直となり、金型上での成形加工性が困難となる。 In the present invention, the flexibility of the base fabric is maintained by using fine fibers as the base material, and the base material and rubber in the base fabric obtained by impregnating and adhering the rubber composition to the base material are unlikely to occur. It is excellent in workability to a desired sealing material and excellent in surface smoothness of the sealing material after molding. When the fiber diameter is too large or the weave density is high, the base fabric becomes stiff and the moldability on the mold becomes difficult.
<基布>
基布は、前記基材をゴム組成物に埋設して、あるいはゴム組成物の溶液を基材に含浸させて製造される。図6は、すだれ織物がゴム組成物に埋設された基布の断面図を示す。図において縦糸13は長手方向に一定間隔をおいて配置され、その間を微細な横糸14が縦糸13の上下に交互に配置され、縦糸13の相互の位置関係を維持している。そして基布11は、縦糸及び横糸よりなる基材がゴム組成物12に埋設されている。
<Base fabric>
The base fabric is manufactured by embedding the base material in a rubber composition or impregnating the base material with a solution of the rubber composition. FIG. 6 shows a cross-sectional view of a base fabric in which a braided fabric is embedded in a rubber composition. In the figure, the
基布中のゴム組成物の含有量は、40〜80質量%、好ましくは50〜70質量%の範囲である。パッキンに必要とする物性、例えば適度の弾力性、成形の際の基布の相互の接着性を維持し、架橋前の基材の積層体を所望形状に癖付けを可能とし、加圧下で予備成形体に成形可能とするためにゴム組成物の含有量は調整される。 Content of the rubber composition in a base fabric is 40-80 mass%, Preferably it is the range of 50-70 mass%. Maintains the physical properties required for packing, such as moderate elasticity and mutual adhesion of the base fabric during molding, and allows the laminate of the base material before crosslinking to be brazed into the desired shape, preliminarily under pressure The content of the rubber composition is adjusted so that it can be molded into a molded body.
基布におけるゴム組成物の含量が少ないと、シート又はその積層体の剛直な物性がパッキン全体に与える悪影響が強すぎて、シール材として適度な弾力性を具備したパッキンとなり難く、基材の層間剥離が生じやすい。また、製造過程では、癖付けが困難で予備成形体等への加工性も悪くなる。一方、基布中のゴム組成物の含量が上記範囲を超えて多いと、ゴム成分の柔軟な物性がパッキン全体の物性に与える影響が大きく、基材を充填することによるパッキンへの補強効果が不十分となり、いわゆる、腰の強い基布の積層成形パッキンが得られ難くなる。 If the content of the rubber composition in the base fabric is small, the rigid physical properties of the sheet or its laminate are too bad for the entire packing, and it is difficult to obtain a packing having an appropriate elasticity as a sealing material. Peeling easily occurs. Further, in the manufacturing process, it is difficult to braze and the workability to a preformed body and the like is also deteriorated. On the other hand, if the content of the rubber composition in the base fabric exceeds the above range, the influence of the flexible physical properties of the rubber component on the physical properties of the entire packing is large, and the effect of reinforcing the packing by filling the base material is large. It becomes inadequate and it becomes difficult to obtain a so-called laminate molding packing of a strong base fabric.
(テープ状の基布)
テープ状の基布は、ゴム組成物に基材が埋設された長尺の基布を長手方向に所定角度で、一定の幅でバイアスに裁断して複数のテープ状の基布11が製造される。テープ状の基布の幅mは、例えば10〜30mmであり、バイアス角度θは、通常30°〜60°の範囲に設定される。
(Tape-like base fabric)
The tape-shaped
(基布の伸率)
テープ状の基布の伸率は、35〜60%の範囲が望ましい。この範囲においてパッキンに形成される基布に柔軟性を付与し、所望形状に予備成形を可能とする。そして予備成形後には成形圧力を解放しても復元力が小さくすることで成形形状を維持し、加硫後においては、耐摩耗性及び耐シール性に優れたパッキンを得ることができる。
(Elongation rate of base fabric)
The elongation of the tape-like base fabric is desirably in the range of 35 to 60%. Within this range, the base fabric formed on the packing is given flexibility and can be preformed into a desired shape. Then, after the pre-molding, even if the molding pressure is released, the restoring force is reduced to maintain the molded shape, and after vulcanization, a packing excellent in wear resistance and seal resistance can be obtained.
<ゴム組成物>
基材を埋設するゴム組成物は、例えば、水素化ニトリルゴム、ニトリルゴムなどのゴム組成物を、溶剤に溶解させて製造される。溶剤は、例えば、アセトン、トルエン、メチルイソブチルケトン(MIBK)等のゴム用溶剤が使用できる。
<Rubber composition>
The rubber composition for embedding the base material is produced, for example, by dissolving a rubber composition such as hydrogenated nitrile rubber or nitrile rubber in a solvent. As the solvent, for example, rubber solvents such as acetone, toluene, and methyl isobutyl ketone (MIBK) can be used.
ゴム組成物中のゴム成分と、溶剤との配合比は特に限定されず、ゴム組成物100重量部中に例えば、ゴム成分は、15〜25重量部の量で、また溶剤は残部量、例えば、85〜75重量部の量で含まれる。 The compounding ratio of the rubber component in the rubber composition and the solvent is not particularly limited. For example, in 100 parts by weight of the rubber composition, the rubber component is in an amount of 15 to 25 parts by weight, and the solvent is the remaining amount, for example, , 85-75 parts by weight.
本発明において、ゴム成分は、水素化ニトリルゴム(以下、「H−NBR」とも記載する。)を60質量%以上含んでいる。ここで水素化ニトリルゴムにおいて、アクリロニトリル含有量が、25質量%〜50質量%の範囲である。 In the present invention, the rubber component contains 60% by mass or more of hydrogenated nitrile rubber (hereinafter also referred to as “H-NBR”). Here, in the hydrogenated nitrile rubber, the acrylonitrile content is in the range of 25% by mass to 50% by mass.
水素化ニトリルゴムは、ニトリルゴムのブタジエン単位の二重結合部に水素添加したポリマーであり、水素添加することにより、耐熱性および耐老化性が向上する。ここで水素添加率は60〜98%のものが市販されており、好適に使用可能である。 The hydrogenated nitrile rubber is a polymer obtained by hydrogenating the double bond portion of the butadiene unit of the nitrile rubber, and heat resistance and aging resistance are improved by hydrogenation. Here, a hydrogenation rate of 60 to 98% is commercially available, and can be suitably used.
水素化ニトリルゴム(H−NBR)は、ゴム組成物に要求される成形性やゴム架橋体に要求される機械的特性、光透過性等を考慮して、各種のものが適宜に採用され得る。具体的には、日本ゼオン株式会社製の商品名:ゼットポール(ZETPOL)系やバイエル(Bayer)社製の商品名:テルバン(Therban)系等が例示される。 Various types of hydrogenated nitrile rubber (H-NBR) can be appropriately employed in consideration of the moldability required for the rubber composition, the mechanical properties required for the rubber cross-linked product, light transmittance, and the like. . Specifically, the brand name made by Nippon Zeon Co., Ltd .: ZETPOL series, the brand name made by Bayer Corporation: Therban series, etc. are exemplified.
本発明では、これらの水素化ニトリルゴムを単独で用いても良いし、ムーニー粘度や加硫速度、オイル量等の調整などの目的で2種類以上のH−NBRをブレンドして用いても良い。 In the present invention, these hydrogenated nitrile rubbers may be used alone, or two or more kinds of H-NBR may be blended and used for the purpose of adjusting Mooney viscosity, vulcanization speed, oil amount and the like. .
また、H−NBRを他のゴム成分とブレンドすることも可能である。その他のゴム成分としては、例えば、エチレン−プロピレン−ジエンゴム(EPDM)、エチレン−プロピレンゴム(EPM)、ニトリルゴム(NBR;アクリロニトリルブタジエンゴム)、ブチルゴム(IIR)、フッ素ゴム(FKM)、シリコーンゴム等を用いることができる。なかでも、シール性の観点から、ニトリルゴム(NBR)、EPDM、FKM等が好ましい。ゴム成分は1種のみからなっていてもよいし、2種以上を含んでいてもよい。 It is also possible to blend H-NBR with other rubber components. Other rubber components include, for example, ethylene-propylene-diene rubber (EPDM), ethylene-propylene rubber (EPM), nitrile rubber (NBR; acrylonitrile butadiene rubber), butyl rubber (IIR), fluoro rubber (FKM), silicone rubber, and the like. Can be used. Of these, nitrile rubber (NBR), EPDM, FKM and the like are preferable from the viewpoint of sealing properties. The rubber component may consist of only one kind or may contain two or more kinds.
これらのゴム成分を用いる場合は、ゴム成分全体の40質量%未満配合される。
<架橋剤>
本発明において架橋剤として、硫黄、有機硫黄化合物、ジスルフィッド、有機過酸化物等が用いられる。有機過酸化物として、EPDM、H−NBRに採用されているものとして、例えば2,5−ジメチル−2,5−ジ−t−ブチル−パーオキシヘキサン−3、ジ−t−ブチルパーオキサイド、2,5−ジメチル−2,5−ジ−t−ブチル−パーオキシヘキサン、t−ブチルクミルパーオキサイド、1,3−ビス(t−ブチルパーオキシ−イソプロピル)ベンゼン、ジクミルパーオキサイド、4,4−ジ−t−ブチルパーオキシ−ブチルバレレート、2,2−ジ−t−ブチルパーオキシ−ブタン、1,1−ジ−t−ブチルパーオキシ−3,3,5−トリメチルシクロヘキサン、ジ−ベンゾイルパーオキサイド、ビス(o−メチルベンゾイル)パーオキサイド、ビス(p−メチルベンゾイル)パーオキサイド、t−ブチルパーオキシベンジラート等が例示される。
When these rubber components are used, they are blended in an amount of less than 40% by mass of the entire rubber component.
<Crosslinking agent>
In the present invention, sulfur, an organic sulfur compound, disulfide, an organic peroxide, or the like is used as a crosslinking agent. Examples of organic peroxides employed in EPDM and H-NBR include 2,5-dimethyl-2,5-di-t-butyl-peroxyhexane-3, di-t-butyl peroxide, 2,5-dimethyl-2,5-di-t-butyl-peroxyhexane, t-butylcumyl peroxide, 1,3-bis (t-butylperoxy-isopropyl) benzene, dicumyl peroxide, 4, 4-di-t-butylperoxy-butylvalerate, 2,2-di-t-butylperoxy-butane, 1,1-di-t-butylperoxy-3,3,5-trimethylcyclohexane, di -Benzoyl peroxide, bis (o-methylbenzoyl) peroxide, bis (p-methylbenzoyl) peroxide, t-butyl peroxybenzylate, etc. It is exemplified.
架橋剤は、1種類もしくは複数の種類を、ゴム成分100質量部に対して、0.5〜5質量部の範囲で配合される。 A crosslinking agent is mix | blended in the range of 0.5-5 mass parts with respect to 100 mass parts of rubber components by 1 type or several types.
<パッキンの製造>
本発明のパッキンは、環状の金型を用いて、次の工程により製造される。
(a)基材に水素化ニトリルゴム組成物の溶液を含浸し、ゴム組成物に基材を埋設した基布を準備する工程。
(b)前記基布を所定寸法でバイアスに裁断した複数のテープ状の基布を準備する工程。
(c)前記テープ状の基布を環状の金型の表面にその周方向に沿って全周に亘って順次配列する工程。
(d)前記テープの基布を金型方向に加圧して、前記テープ状の基布を相互に密着させて予備成形体を形成する工程。
(e)前記予備成形体を加圧、加熱して架橋する工程。
<Manufacture of packing>
The packing of the present invention is manufactured by the following process using an annular mold.
(A) A step of preparing a base fabric in which a base material is embedded in a rubber composition by impregnating the base material with a solution of the hydrogenated nitrile rubber composition.
(B) A step of preparing a plurality of tape-shaped base fabrics obtained by cutting the base fabric into biases with predetermined dimensions.
(C) A step of sequentially arranging the tape-like base fabric on the surface of the annular mold along the circumferential direction thereof.
(D) A step of pressurizing the base fabric of the tape in the mold direction so that the tape-shaped base fabrics are in close contact with each other to form a preform.
(E) A step of pressing and heating the preform to crosslink.
以下、本発明の環状のパッキンを製造する方法を図面を参照して説明する。図3は、環状の金型に成形されたパッキンの斜視図である。図4は、図3におけるA−A断面図である。 Hereinafter, a method for producing an annular packing according to the present invention will be described with reference to the drawings. FIG. 3 is a perspective view of a packing formed in an annular mold. FIG. 4 is a cross-sectional view taken along the line AA in FIG.
<テープ状の基布を準備する工程>
図5において、テープ状の基布11は、長尺の基布150を、基布の長さ方向に所定角度θ(X方向)にバイアス裁断し、平面が平行四辺形のテープ状の基布11の複数枚を作製する。
<Process for preparing tape-shaped base fabric>
In FIG. 5, a tape-shaped
図5に基材をゴム組成物に埋設した長尺の基布150の概略図を、図6には基布150の断面図を示す。図5および図6において紙面に向かって左右に延びた長尺の基布150を、長手方向(紙面に向かって横方向)に対するバイアス角度θが、例えば30°〜60°に裁断して、平行四辺形のテープ状の基布11を得る。
FIG. 5 is a schematic view of a
なお、基布150は、図5において縦糸13と横糸14のすだれ織物が用いられており、縦糸13は基材長手方向に配列し、横糸14は基材幅方向に配列するようにして織成されている。
In addition, the weft fabric of the
テープ状の基布11の寸法は、シールするピストン軸等の内径及び外径、使用部位、必要な溝の深さ、パッキンの寸法等にもより異なり、一概に決定されないが、例えば、基布の幅mは、10mm〜30mmである。また基材のゴム組成物含浸前の厚みは0.2mm〜0.8mmである。なお基布の長さは特に限定されない。
The dimensions of the tape-shaped
また、基材のゴム組成物含浸前の目付重量が100〜300g/m2、好ましくは150〜250g/m2である。この目付重量が上記範囲より大きいと、目付重量が大きすぎて、パッキンの表面外観が劣悪となるとともに弾力性に乏しくなる傾向がある。 The basis weight of the base material before impregnation with the rubber composition is 100 to 300 g / m 2 , preferably 150 to 250 g / m 2 . When the weight per unit area is larger than the above range, the weight per unit area is too large, and the surface appearance of the packing tends to be poor and the elasticity tends to be poor.
<予備成形する工程>
図3および図4において、基布をバイアスに裁断した平面が平行四辺形のテープ状の基布11を、成型金型10の外周面に、その周方向に沿って螺旋状に順次配列する。成形金型10の周方向に配列、積層されたテープ状の基布11を、金型の表面形状に沿って押圧もしくは、外金型に嵌合して予備成形を行う。この際、テープ状の基布を金型10に仮被着させ、またテープ状の基布11を互いに密着させるために接着剤を用いることができる。ここで接着剤は、例えばパッキンに用いられるゴム組成物と同様な組成の糊剤を用いることができる。
<Step of preforming>
3 and 4, a tape-
本発明では、テープ状の基布11の1枚または複数枚が、必要により接着剤を介して金型表面に積層された予備成形体を、成型金型10側の外側から加圧してテープ状の基布11どうしを緊密に密着させる。
In the present invention, one or more tape-shaped
この加圧の際には、上記成形金型10と組み合わせて、予備成形体をサンドイッチにして所望形状に成形可能な外側金型を用いてもよい。その外側金型の断面形状は、上記リング状の成形金型10の外周面形状と合致するように、断面円形凹部付き三角形、断面く字状、断面C字状等の空隙部形状となっていることが望ましい。
At the time of this pressurization, an outer mold that can be molded into a desired shape by sandwiching the preformed body may be used in combination with the
本発明において型付けの際には、成形金型10が用いられるが、、図2のパッキンの溝Gに対応して、図4に示す成形金型10には凸部G’を有しており、成型金型10の断面三角形状であり、平面形状は環状である。この成形金型10を用いることで所望形状に型づけを確実かつ容易に実施することができる。 In the present invention, the molding die 10 is used for molding, but the molding die 10 shown in FIG. 4 has a convex portion G ′ corresponding to the groove G of the packing in FIG. The molding die 10 has a triangular cross section, and the planar shape is annular. By using this molding die 10, it is possible to reliably and easily perform molding into a desired shape.
<架橋工程>
図2には、型付けして得られた予備成形体を金型内で加圧下に加熱して、架橋、成形された断面略V字状のパッキン41が示されている。架橋・成形条件は、ゴム組成物のゴム成分の種類により異なり一概に決定されないが、例えば、水素化ニトリルゴムが100部含まれる組成物では、120〜170℃の温度で1〜40分間保持される。架橋・成形されたパッキン41は、外観表面の平滑性に優れ、引張強さに優れ、曲げに対する柔軟性を有し、かつ、使用時に層間剥離を起し難く、長期使用に耐え得るパッキンとなっている。
<Crosslinking process>
FIG. 2 shows a packing 41 having a substantially V-shaped cross-section, which is obtained by crosslinking and molding a preformed body obtained by molding and heating it in a mold under pressure. Crosslinking / molding conditions differ depending on the type of rubber component of the rubber composition and are not determined unconditionally. For example, in a composition containing 100 parts of hydrogenated nitrile rubber, it is held at a temperature of 120 to 170 ° C. for 1 to 40 minutes. The The cross-linked and molded packing 41 has excellent external surface smoothness, excellent tensile strength, flexibility for bending, and does not cause delamination during use, and can withstand long-term use. ing.
<製品パッキンの製造>
本発明のパッキン41を積層体で形成した場合には、シールすべき環状部材(例えば、回転軸)の外表面の何れの部位においても、基材の縦糸(または横糸)が、環状部材の円周方向と同一面上でバイアスに交わるように配列されている。
<Manufacture of product packing>
When the packing 41 of the present invention is formed of a laminated body, the warp (or weft) of the base material is a circle of the annular member at any part of the outer surface of the annular member (for example, the rotating shaft) to be sealed. They are arranged so as to cross the bias on the same plane as the circumferential direction.
本発明のパッキンの製造方法では、バイアス裁断されたテープ状の基布を構成する繊維が積層体の層間でバイアスに配置されることで、パッキンの予備成形は、従来の基材繊維に比べて、型付しやすく効率が良い。しかもパッキンの基材繊維の剥離が防止され外観および引張強さや曲げ等のバランスに優れる。 In the packing manufacturing method of the present invention, the fibers constituting the bias-cut tape-shaped base fabric are arranged in a bias between the layers of the laminate, so that the preforming of the packing is performed in comparison with the conventional base fiber. Easy to mold and efficient. In addition, peeling of the base fiber of the packing is prevented, and the balance of appearance, tensile strength, bending and the like is excellent.
実施例、比較例の環状のパッキンおよびその製造方法について具体的に説明する。
<基材>
表2に示される実施例及び比較例に用いられた基材は次のとおりである。
(1)基材(綿)
厚織り、縦糸密度:10本/cm、横糸密度:10/cm、基材厚み:0.7mm、
目付量:61g/m2
(2)基材(アラミド1)
平織り、縦糸密度:12本/cm、横糸密度:12/cm、基材厚み:0.42mm、
目付量:66g/m2
(3)基材(アラミド2)
朱子織り、縦糸密度:29本/cm、横糸密度:20本/cm、基材厚み:0.65mm、目付量:66g/m2
<基布の作製>
表1で示される配合A〜配合Cのゴム組成物の含浸液を、各種基材に塗布して、常温にて乾燥させて基布を製造した。ここで、ゴム組成物の質量は基布の質量の66質量%である。
The annular packing of the examples and comparative examples and the manufacturing method thereof will be specifically described.
<Base material>
The base materials used in the examples and comparative examples shown in Table 2 are as follows.
(1) Base material (cotton)
Thick weave, warp density: 10 / cm, weft density: 10 / cm, substrate thickness: 0.7 mm,
Weight per unit area: 61 g / m 2
(2) Base material (aramid 1)
Plain weave, warp density: 12 / cm, weft density: 12 / cm, substrate thickness: 0.42 mm,
Weight per unit area: 66 g / m 2
(3) Base material (aramid 2)
Satin weave, warp density: 29 / cm, weft density: 20 / cm, substrate thickness: 0.65 mm, basis weight: 66 g / m 2
<Production of base fabric>
A base fabric was produced by applying the impregnating solutions of the rubber compositions of Formulation A to Formulation C shown in Table 1 to various substrates and drying them at room temperature. Here, the mass of the rubber composition is 66% by mass of the mass of the base fabric.
(ゴム含浸液)
表1で示される配合A〜配合Cのゴム組成物と、溶剤(MIBK:メチルイソブチルケトン)とを、ゴム組成物(固形分:22質量%)質量部に対して溶剤(78質量%)質量部の量で混合して調製した。
(Rubber impregnation solution)
The rubber composition of Formulation A to Formulation C shown in Table 1 and the solvent (MIBK: methyl isobutyl ketone) were mixed in a solvent (78 mass%) mass with respect to mass parts of the rubber composition (solid content: 22 mass%). Prepared by mixing in parts.
(テープ状の基布の作製)
次いで、長尺の基布を長さ方向に対して約45°の角度(図5で、θ=45°)で幅mが20mm間隔で裁断して、幅20mmのテープ状の基布を得た。
(Production of tape-shaped base fabric)
Next, the long base fabric is cut at an angle of about 45 ° with respect to the length direction (θ = 45 ° in FIG. 5) at intervals of 20 mm to obtain a tape-shaped base fabric having a width of 20 mm. It was.
(パッキンの作成)
次いで、テープ状の基布を図3および図4に示すように、そのバイアスに裁断された端が成形金型10の上面周方向と一致するように円形に配列すると共に型付けしながら湖剤(組成:ゴム含浸液と同じもの)にて貼付して積層して断面略V字状に癖付けされた予備成形体を得た。
(Create packing)
Next, as shown in FIG. 3 and FIG. 4, the tape-shaped base fabric is arranged in a circle so that the end cut by the bias coincides with the circumferential direction of the upper surface of the molding die 10, and the lake agent ( Composition: the same as the rubber impregnating solution) was laminated and laminated to obtain a preform molded with a substantially V-shaped cross section.
次いで、型付けされた予備成形体を、加熱加圧成形用金型内にセットして160℃の温度で、約25分間、圧力10MPaで加圧して、架橋・成形されたパッキンを作製した。作成したパッキンは、図2を参照して、高さhが8.5mm、内径R1が98.7mm、幅Wが11.3mmであった。 Next, the molded preform was set in a heat and pressure molding mold and pressed at a temperature of 160 ° C. for about 25 minutes at a pressure of 10 MPa to produce a crosslinked and molded packing. With reference to FIG. 2, the created packing had a height h of 8.5 mm, an inner diameter R1 of 98.7 mm, and a width W of 11.3 mm.
<物性の評価方法>
パッキンの材料評価及び作動試験評価を以下の方法で実施し、その結果を表2に示す。評価は、1点〜5点の評価とし、5点が最も優れている。
<Method for evaluating physical properties>
The material evaluation and operation test evaluation of the packing were carried out by the following methods, and the results are shown in Table 2. The evaluation is 1 to 5 points, and 5 points is the best.
(1)耐熱性
材料評価と作動試験をそれぞれの結果に基づき総合評価を行った。
(1) Heat resistance Material evaluation and operation tests were comprehensively evaluated based on the respective results.
(a)材料評価試験
基布を用いて長さ100mm×厚み2〜3mmのダンベル試験片を作製し、120〜160℃環境下で、JIS・B2403による劣化試験を行った。尚、試験片は作動油中でMAX 1,000Hrの浸漬を行なった。硬さ、引張り強さ、伸び、体積の特性を測定して材料劣化の程度を評価した。
(A) Material evaluation test A dumbbell test piece having a length of 100 mm and a thickness of 2 to 3 mm was prepared using a base fabric, and a deterioration test was performed according to JIS B2403 in an environment of 120 to 160 ° C. The test piece was immersed in MAX 1,000 Hr in hydraulic oil. The degree of material deterioration was evaluated by measuring the characteristics of hardness, tensile strength, elongation, and volume.
(b)作動試験
パッキンを環境温度100℃での作動試験を行った。ここで作動条件は、負荷圧力は21MPa、作動速度は約200mm/sec、ストロークは50mmである。この試験は、貫通ロッドタイプの試験装置(JIS B2409付図1のような)のロッドパッキン部分に評価用試料を組み付け、油圧源で両パッキン間に圧力を負荷しながらロッドを直接駆動し作動試験を行う試験である。0〜100km作動時の漏れ量(cc/100m)を測定して耐久性を評価した。
(B) Operation test The packing was subjected to an operation test at an environmental temperature of 100 ° C. Here, the operating conditions are a load pressure of 21 MPa, an operating speed of about 200 mm / sec, and a stroke of 50 mm. In this test, a sample for evaluation is assembled in the rod packing part of a penetrating rod type test device (as shown in Fig. 1 with JIS B2409), and the rod is directly driven while applying pressure between both packings with a hydraulic source to perform an operation test. It is a test to be performed. Durability was evaluated by measuring the amount of leakage (cc / 100m) during operation of 0 to 100 km.
(2)耐蒸気性
基布を用いて長さ100mm×厚み2〜3mmのダンベル試験片を作製し、120〜180℃環境下で、JIS・K6258による劣化試験を行った。硬さ、引張り強さ、伸び、体積の特性を測定して材料劣化の程度を評価した。
(2) Steam resistance A dumbbell test piece having a length of 100 mm and a thickness of 2 to 3 mm was prepared using a base fabric, and a deterioration test was conducted according to JIS · K6258 in an environment of 120 to 180 ° C. The degree of material deterioration was evaluated by measuring the characteristics of hardness, tensile strength, elongation, and volume.
(3)耐摩耗性
作動試験とシリンダ作動耐久試験の総合評価を行った。
(3) Abrasion resistance A comprehensive evaluation of the operation test and the cylinder operation durability test was conducted.
(a)作動試験
環境温度100℃での作動試験を行った。作動条件は、負荷圧力は21MPa、作動速度は約200mm/sec、ストロークは50mm、作動油は水-グリコール系作動油である。この試験は、貫通ロッドタイプの試験装置(JIS B2409付図1のような)のロッドパッキン部分に評価用試料を組み付け、油圧源で両パッキン間に圧力を負荷しながらロッドを直接駆動し作動試験を行う試験である。パッキンの寸法変化と外観の破損状況から、耐摩耗性を評価した。
(A) Operation test An operation test was conducted at an environmental temperature of 100 ° C. The operating conditions are a load pressure of 21 MPa, an operating speed of about 200 mm / sec, a stroke of 50 mm, and the hydraulic oil is a water-glycol hydraulic oil. In this test, a sample for evaluation is assembled in the rod packing part of a penetration rod type test device (as shown in Fig. 1 with JIS B2409), and the rod is directly driven while applying pressure between both packings with a hydraulic source to perform an operation test. It is a test to be performed. Abrasion resistance was evaluated from the dimensional change of the packing and the appearance damage.
(b)シリンダ作動耐久試験
リリーフ圧力は21MPa、油温は60℃、作動速度は約100mm/sec、ストロークは250mm、作動距離は1,000kmで、作動油は水-グリコール系作動油で行った。この試験は、複動型シリンダを用い、ロッドパッキン部(または、ピストン部)に評価用試料を組み付け、油圧源による圧力でシリンダを作動させて行う試験である。パッキンの寸法変化と外観の破損状況から、耐摩耗性を評価した。
(B) Cylinder operation endurance test The relief pressure was 21 MPa, the oil temperature was 60 ° C., the operation speed was about 100 mm / sec, the stroke was 250 mm, the operation distance was 1,000 km, and the operation oil was water-glycol-based operation oil. . This test is a test performed by using a double-acting cylinder, assembling an evaluation sample in the rod packing part (or piston part), and operating the cylinder with pressure from a hydraulic source. Abrasion resistance was evaluated from the dimensional change of the packing and the appearance damage.
(4)シール性
作動試験とシリンダ作動耐久試験の総合評価を行った。
(4) Sealability A comprehensive evaluation of the operation test and the cylinder operation durability test was performed.
(a)作動試験
環境温度100℃での作動試験を行った。作動条件は、負荷圧力は21MPa、作動速度は約200mm/sec、ストロークは50mm、作動油は水-グリコール系作動油である。この試験は、貫通ロッドタイプの試験装置(JIS B2409付図1のような)のロッドパッキン部分に評価用試料を組み付け、油圧源で両パッキン間に圧力を負荷しながらロッドを直接駆動し作動試験を行う試験である。0〜100km作動時の外部漏れ量(cc/100m)を測定して、シール性を評価した。
(A) Operation test An operation test was conducted at an environmental temperature of 100 ° C. The operating conditions are a load pressure of 21 MPa, an operating speed of about 200 mm / sec, a stroke of 50 mm, and the hydraulic oil is a water-glycol hydraulic oil. In this test, a sample for evaluation is assembled in the rod packing part of a penetration rod type test device (as shown in Fig. 1 with JIS B2409), and the rod is directly driven while applying pressure between both packings with a hydraulic source to perform an operation test. It is a test to be performed. The amount of external leakage (cc / 100m) during operation of 0 to 100 km was measured to evaluate the sealing performance.
(b)シリンダ作動耐久試験
リリーフ圧力は21MPa、油温は60℃、作動速度は約100mm/sec、ストロークは250mm、作動距離は1,000km、作動油は水-グリコール系作動油行った。この試験は、複動型シリンダを用い、ロッドパッキン部(または、ピストン部)に評価用試料を組み付け、油圧源による圧力でシリンダを作動させて行う試験である。0〜1,000km作動時の外部漏れ量(cc/100m)を測定して、シール性を評価した。
(B) Cylinder operation endurance test The relief pressure was 21 MPa, the oil temperature was 60 ° C., the operation speed was about 100 mm / sec, the stroke was 250 mm, the operation distance was 1,000 km, and the operation oil was a water-glycol type operation oil. This test is a test performed by using a double-acting cylinder, assembling an evaluation sample in the rod packing part (or piston part), and operating the cylinder with pressure from a hydraulic source. The amount of external leakage (cc / 100m) during operation of 0 to 1,000 km was measured to evaluate the sealing performance.
(5)シール寿命性
材料評価試験と作動試験の総合評価を行った。
(5) Seal life performance The material evaluation test and the operation test were comprehensively evaluated.
(a)材料評価試験
120〜160℃環境下で布入りダンベル(JIS B2403)による劣化試験であり、作動油中でMAX 1,000Hrの浸漬を行った。硬さ、引張り強さ、伸び、体積の特性を測定して、シール寿命性を評価した。
(A) Material evaluation test This is a deterioration test using a dumbbell with cloth (JIS B2403) in an environment of 120 to 160 ° C., and MAX 1,000 Hr was immersed in hydraulic oil. The characteristics of hardness, tensile strength, elongation, and volume were measured to evaluate the seal life.
(b)作動試験
環境温度100℃での作動試験を行った。作動条件は、負荷圧力は21MPa、作動速度は約200mm/sec、ストロークは50mm、作動油は水-グリコール系作動油である。この試験は、貫通ロッドタイプの試験装置(JIS B2409付図1のような)のロッドパッキン部分に評価用試料を組み付け、油圧源で両パッキン間に圧力を負荷しながらロッドを直接駆動し作動試験を行う試験である。0〜100km作動時の外部漏れ量(cc/100m)を測定して、シール寿命性を評価した。
(B) Operation test An operation test was conducted at an environmental temperature of 100 ° C. The operating conditions are a load pressure of 21 MPa, an operating speed of about 200 mm / sec, a stroke of 50 mm, and the hydraulic oil is a water-glycol hydraulic oil. In this test, a sample for evaluation is assembled in the rod packing part of a penetrating rod type test device (as shown in Fig. 1 with JIS B2409), and the rod is directly driven while applying pressure between both packings with a hydraulic source to perform an operation test. It is a test to be performed. The amount of external leakage (cc / 100m) during operation of 0 to 100 km was measured to evaluate the seal life.
(6)基布の伸率測定
基布を用いて長さが100mm、厚みが2〜3mmのダンベル試験片を作製し、JIS・B2403による引張試験を行い、その際の伸率を測定した。
(6) Measurement of elongation rate of base fabric A dumbbell test piece having a length of 100 mm and a thickness of 2 to 3 mm was prepared using a base fabric, a tensile test according to JIS / B2403 was performed, and the elongation rate at that time was measured.
本発明は、基材がゴム組成物に埋設された基布で成形された環状のパッキンであって特に、ピストンとシリンダーの間に配置される断面が略V字形状あるいはU字状を有する。本発明の環状のパッキングは、電力プラント、化学工業プラント、タイヤ工業、各種機器、装置の摺動部のシール等、広汎な産業分野において使用が可能である。 The present invention is an annular packing formed of a base fabric in which a base material is embedded in a rubber composition, and in particular, a cross section disposed between a piston and a cylinder has a substantially V shape or U shape. The annular packing of the present invention can be used in a wide variety of industrial fields such as power plant, chemical industry plant, tire industry, various equipment, and seals of sliding parts of devices.
4 パッキン、41 環状のパッキン、4a 外側基布、4b 内側基布、10 成形金型、11 テープ状の基布、12 ゴム組成物、13 縦糸、14 横糸。 4 packing, 41 annular packing, 4a outer base fabric, 4b inner base fabric, 10 molding die, 11 tape-shaped base fabric, 12 rubber composition, 13 warp, 14 weft.
Claims (7)
(a)基材に水素化ニトリルゴム組成物の溶液を含浸し、ゴム組成物に基材を埋設した基布を準備する工程、
(b)前記基布を所定の寸法でバイアスに裁断した複数のテープ状の基布を準備する工程、
(c)前記テープ状の基布を環状の金型の表面にその周方向に沿って全周に亘って順次配列する工程、
(d)前記テープ状の基布を金型方向に加圧して、前記テープ状の基布を相互に密着させて予備成形体を形成する工程、および
(e)前記予備成形体を加圧、加熱して架橋する工程
よりなるパッキンの製造方法。 A method for producing the packing according to claim 1 using an annular mold,
(A) impregnating a base material with a hydrogenated nitrile rubber composition solution and preparing a base fabric in which the base material is embedded in the rubber composition;
(B) a step of preparing a plurality of tape-shaped base fabrics obtained by cutting the base fabric into biases with a predetermined dimension;
(C) a step of sequentially arranging the tape-shaped base cloth on the surface of the annular mold along the entire circumference thereof;
(D) pressurizing the tape-shaped base fabric in the mold direction, and bringing the tape-shaped base fabric into close contact with each other to form a preform, and (e) pressurizing the preform. A method for producing a packing comprising a step of crosslinking by heating.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2015150783A JP6599681B2 (en) | 2015-07-30 | 2015-07-30 | Packing |
CN201610619820.8A CN106397895B (en) | 2015-07-30 | 2016-07-29 | Sealing element |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2015150783A JP6599681B2 (en) | 2015-07-30 | 2015-07-30 | Packing |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2017032029A JP2017032029A (en) | 2017-02-09 |
JP6599681B2 true JP6599681B2 (en) | 2019-10-30 |
Family
ID=57985882
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2015150783A Active JP6599681B2 (en) | 2015-07-30 | 2015-07-30 | Packing |
Country Status (2)
Country | Link |
---|---|
JP (1) | JP6599681B2 (en) |
CN (1) | CN106397895B (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6500053B2 (en) * | 2017-03-22 | 2019-04-10 | 三菱電線工業株式会社 | Sealing material |
DE102017204810A1 (en) * | 2017-03-22 | 2018-09-27 | Robert Bosch Gmbh | Fluid cylinder with improved sealing element and manufacturing method therefor |
CN109759787B (en) * | 2018-12-10 | 2020-05-19 | 武汉鑫华封机械制造有限责任公司 | Iron-plastic combined super-wear-resistant high-strength floating oil seal ring and manufacturing method thereof |
CN109719969B (en) * | 2018-12-29 | 2021-08-20 | 北京航天天美科技有限公司 | Layering method on molded surface mold |
CN109719970B (en) * | 2018-12-29 | 2021-08-10 | 北京航天天美科技有限公司 | Heat-proof skirt and preparation method thereof |
JP7301702B2 (en) * | 2019-09-27 | 2023-07-03 | 日立建機株式会社 | Construction Machinery and Cylinder Parts Replacement Timing Prediction System |
JP7431009B2 (en) * | 2019-10-09 | 2024-02-14 | 株式会社バルカー | Composite, packing and manufacturing method |
CN114619601A (en) * | 2021-12-30 | 2022-06-14 | 浙江国泰萧星密封材料股份有限公司 | Preparation method of oil pocket for sealed large-size coupler |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59174456U (en) * | 1983-05-10 | 1984-11-21 | エヌオーケー株式会社 | Patsukin |
JP3490820B2 (en) * | 1995-12-05 | 2004-01-26 | 藤倉ゴム工業株式会社 | Rubber composition for sealing material |
JP2004099735A (en) * | 2002-09-09 | 2004-04-02 | Nippon Valqua Ind Ltd | Production method for sheet-like sealant |
JP4124338B2 (en) * | 2003-01-17 | 2008-07-23 | Nok株式会社 | Hydrogenated nitrile rubber composition |
JP4712486B2 (en) * | 2005-08-24 | 2011-06-29 | 日本バルカー工業株式会社 | Rubber laminated packing with cloth |
CN101745257B (en) * | 2008-12-08 | 2011-12-07 | 中国石油天然气股份有限公司 | Method for treating filter cloth of plate-and-frame filter press |
JP5792643B2 (en) * | 2012-01-12 | 2015-10-14 | 三菱電線工業株式会社 | Rubber composition for sealing material and sealing material |
CN102678822B (en) * | 2012-04-23 | 2014-04-09 | 宁波丰茂远东橡胶有限公司 | Timing belt made of modified hydrogenated butadiene-acrylonitrile rubber of ethylene and vinyl acetate rubber |
JP6165460B2 (en) * | 2013-02-15 | 2017-07-19 | ニッタ株式会社 | Ball screw, seal material, and seal structure |
CN103757933B (en) * | 2014-01-21 | 2015-07-15 | 宁波裕江特种胶带有限公司 | Hydrogenated butadiene-acrylonitrile rubber adhesive tape for automotive synchronous belt and production method thereof |
CN104804268A (en) * | 2015-03-29 | 2015-07-29 | 安徽美祥实业有限公司 | Rubber material for sealing elements |
-
2015
- 2015-07-30 JP JP2015150783A patent/JP6599681B2/en active Active
-
2016
- 2016-07-29 CN CN201610619820.8A patent/CN106397895B/en active Active
Also Published As
Publication number | Publication date |
---|---|
CN106397895B (en) | 2020-08-18 |
JP2017032029A (en) | 2017-02-09 |
CN106397895A (en) | 2017-02-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6599681B2 (en) | Packing | |
KR101497784B1 (en) | Elevator suspension and transmission strip | |
CN101535702B (en) | A low-stress molded gasket and method of making same | |
US9624645B2 (en) | Double-structure bush and bearing assembly comprising same | |
US20150252821A1 (en) | Hydraulic actuator, production method thereof, driving method thereof, driving device, and joint structure | |
KR20130138733A (en) | Toothed belt | |
JP6096239B2 (en) | Toothed belt | |
Kojima et al. | Prolonging the lifetime of straight-fiber-type pneumatic rubber artificial muscle by shape consideration and material development | |
EP0536289B1 (en) | Reinforced flexible composite materials | |
US20090230632A1 (en) | System, method and apparatus for sealing materials having a low glass transition temperature for high performance sealing applications | |
ES2954442T3 (en) | Composite structure for sealing products | |
JP5691553B2 (en) | Pressure-resistant sliding member and brake pad | |
US10480690B2 (en) | Fiber reinforced thermoplastic hoses and methods for forming the same | |
JP2006097787A (en) | Toothed belt | |
JP4712486B2 (en) | Rubber laminated packing with cloth | |
US6386239B1 (en) | Transmission hose for a vehicle | |
JP5192443B2 (en) | Toothed belt | |
RU2583008C1 (en) | Method of producing laminar rubber-fabric elastomeric composite membrane materials | |
KR101663766B1 (en) | Rubber composite sheet having oriented chopped fiber, method for preparing the same, multilayer rubber composite article having cross-oriented chopped fiber, and method for preparing the same | |
CN214821375U (en) | Oil-resistant synchronous belt | |
JP5052999B2 (en) | Belt sleeve vulcanizing jacket | |
JP6383135B1 (en) | Transmission belt and manufacturing method thereof | |
CN1006655B (en) | Woven elastic seal packing and method for manufacturing same | |
JP6322303B2 (en) | Toothed belt | |
JP2021059688A (en) | Complex, packing and production method |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20180525 |
|
A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20190424 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20190514 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20190617 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20190924 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20191003 |
|
R150 | Certificate of patent or registration of utility model |
Ref document number: 6599681 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |