JPH08211774A - Double layer elastic roll and its production - Google Patents
Double layer elastic roll and its productionInfo
- Publication number
- JPH08211774A JPH08211774A JP4122995A JP4122995A JPH08211774A JP H08211774 A JPH08211774 A JP H08211774A JP 4122995 A JP4122995 A JP 4122995A JP 4122995 A JP4122995 A JP 4122995A JP H08211774 A JPH08211774 A JP H08211774A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- elastic body
- heat
- roll
- inner layer
- 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.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 14
- 229910052751 metal Inorganic materials 0.000 claims abstract description 18
- 239000002184 metal Substances 0.000 claims abstract description 18
- 238000004073 vulcanization Methods 0.000 claims abstract description 16
- 230000002093 peripheral effect Effects 0.000 claims abstract description 6
- 239000006260 foam Substances 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 abstract description 6
- 229920002379 silicone rubber Polymers 0.000 abstract description 5
- 239000004945 silicone rubber Substances 0.000 abstract description 5
- 239000000203 mixture Substances 0.000 abstract description 4
- 239000004088 foaming agent Substances 0.000 abstract description 3
- 230000037303 wrinkles Effects 0.000 abstract description 3
- 229910000838 Al alloy Inorganic materials 0.000 abstract description 2
- 239000002131 composite material Substances 0.000 abstract description 2
- 239000010935 stainless steel Substances 0.000 abstract description 2
- 239000010959 steel Substances 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 abstract 1
- 229910001220 stainless steel Inorganic materials 0.000 abstract 1
- 238000000227 grinding Methods 0.000 description 10
- 239000000853 adhesive Substances 0.000 description 8
- 230000001070 adhesive effect Effects 0.000 description 8
- 239000003795 chemical substances by application Substances 0.000 description 8
- 229920001296 polysiloxane Polymers 0.000 description 7
- 238000013329 compounding Methods 0.000 description 6
- 238000001816 cooling Methods 0.000 description 6
- 238000005187 foaming Methods 0.000 description 5
- 238000000465 moulding Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 239000013013 elastic material Substances 0.000 description 3
- 150000002978 peroxides Chemical class 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000006258 conductive agent Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000007765 extrusion coating Methods 0.000 description 1
- 229920001973 fluoroelastomer Polymers 0.000 description 1
- 239000013464 silicone adhesive Substances 0.000 description 1
- 229910001256 stainless steel alloy Inorganic materials 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Landscapes
- Fixing For Electrophotography (AREA)
- Rolls And Other Rotary Bodies (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電子写真装置等におい
て用いられる弾性ロールに関し、特に二層弾性ロールに
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elastic roll used in an electrophotographic apparatus or the like, and more particularly to a two-layer elastic roll.
【０００２】[0002]
【従来の技術】一般に、電子写真装置に使用される弾性
ロールには、加圧ロール，クリーニングロール，帯電ロ
ール，現像ロール，転写ロール等が挙げられる。以下
に、これらの中でも二層弾性ロールの使用頻度が高い加
圧ロールについて説明する。従来、電子写真装置に使用
される弾性ロール（加圧ロール）としては、例えば、芯
金の周面にシリコーンゴム等の耐熱性弾性体が被覆され
た単体のものや、耐熱性多孔質弾性体の内層に、内層と
硬度の異なる耐熱性弾性体の外層を設けたもの等、様々
な工夫がされた弾性ロールが発案されている。2. Description of the Related Art Generally, examples of elastic rolls used in an electrophotographic apparatus include a pressure roll, a cleaning roll, a charging roll, a developing roll and a transfer roll. Among these, the pressure roll in which the two-layer elastic roll is frequently used will be described. Conventionally, as an elastic roll (pressure roll) used in an electrophotographic apparatus, for example, a single body in which a heat-resistant elastic body such as silicone rubber is coated on a peripheral surface of a core metal, or a heat-resistant porous elastic body is used. An elastic roll that has been devised in various ways, such as an inner layer provided with an outer layer of a heat-resistant elastic body having a hardness different from that of the inner layer, has been proposed.
【０００３】近年では、装置の小型化が急速に進められ
ていることから、そこに使用される弾性ロールにも小径
化，軽量化が求められている。この小径化に対応するに
は、従来径と同等のニップ幅を確保できなければならな
い。そのためには、小径化と共に低硬度化が必要となっ
てくる。さらに軽量化も実現するには、耐熱性多孔質弾
性体層の単体品が考えられる。しかし、耐熱性多孔質弾
性体層の単体品の弾性ロールには表面にスキン層が必要
で、これを残したままロールの精度を上げるためには金
型を使用しなければならずコストがかかるうえ、長寿命
に優れない。In recent years, the downsizing of devices has been rapidly promoted, and therefore elastic rolls used therein are also required to have a smaller diameter and a lighter weight. To cope with this reduction in diameter, it is necessary to secure a nip width equivalent to the conventional diameter. For that purpose, it is necessary to reduce the diameter as well as the hardness. In order to achieve further weight reduction, it is conceivable that the heat-resistant porous elastic material layer is used alone. However, a single elastic roll of heat-resistant porous elastic layer requires a skin layer on the surface, and a die must be used to increase the accuracy of the roll without removing it, which is costly. Moreover, it does not have a long life.
【０００４】これを解決するために、耐熱性多孔質弾性
体層の外層として耐熱性弾性体を設けた二層弾性ロール
が多く用いられるようになってきた。この二層弾性ロー
ルは、芯金の周面上に、多数の気泡を有する耐熱性多孔
質弾性体からなる内層と、前記内層に耐熱性弾性体から
なる外層が周設された構造になっている。一般にこの二
層弾性ロールは、芯金上に耐熱性多孔質弾性体の筒状体
を押出被覆し加硫発泡させた後研削形成を行ない、その
外周に耐熱性弾性体を押出成型やＬＩＭ成型等で被覆し
加熱加硫させた後さらに研削形成することによって得ら
れていた。In order to solve this, a two-layer elastic roll provided with a heat resistant elastic body as an outer layer of the heat resistant porous elastic body layer has been widely used. This two-layer elastic roll has a structure in which an inner layer made of a heat-resistant porous elastic body having a large number of bubbles and an outer layer made of a heat-resistant elastic body are provided around the inner surface of the core metal. There is. In general, this two-layer elastic roll is formed by extrusion-coating a cylindrical body of heat-resistant porous elastic material on a core metal, vulcanizing and foaming it, and then grinding it, and then extruding or LIM molding the heat-resistant elastic material on the outer periphery. It was obtained by subjecting it to coating, etc., heat-vulcanizing it, and then grinding it.
【０００５】[0005]
【発明が解決しようとする課題】しかし、このようにし
て製造される二層弾性ロールは、耐熱性多孔質弾性体を
発泡させて内層としているので、ロールの精度（外径寸
法，フレ，外径公差）を上げるためには、内層と外層の
研削形成をそれぞれ行なわなければならなく、コストも
高くなってしまう。However, since the two-layer elastic roll manufactured in this manner has the heat-resistant porous elastic body foamed to form the inner layer, the accuracy of the roll (outer diameter dimension, deflection, outer In order to increase the (diameter tolerance), it is necessary to grind and form the inner layer and the outer layer, respectively, and the cost becomes high.
【０００６】また、内層の耐熱性多孔質弾性体の研削形
成後に、外層の耐熱性弾性体を押出被覆し加熱加硫を行
なうのであるが、内層の表皮であるスキン層が研削され
ているため、加熱加硫時に内層に含まれている空気が膨
張し、気泡が発生して外層の内部にその気泡が混在して
しまう。このため、外層の研削形成時にその気泡がピン
ホールとなって現れてしまうという欠点もある。Further, after the heat-resistant porous elastic body of the inner layer is formed by grinding, the heat-resistant elastic body of the outer layer is extrusion-coated and heated and vulcanized. However, since the inner skin layer, which is the skin, is ground. During the heating and vulcanization, the air contained in the inner layer expands to generate bubbles, and the bubbles are mixed inside the outer layer. Therefore, there is also a drawback that the bubbles appear as pinholes when the outer layer is ground and formed.
【０００７】さらに、このように形成された二層弾性ロ
ールでは、内層と外層が接着されていないため、使用時
に内層と外層とが剥離してしまい、ニップ部において歪
みが起きるクリープ現象により、紙皺や紙詰まりが生じ
てしまう。Further, in the two-layer elastic roll thus formed, since the inner layer and the outer layer are not adhered to each other, the inner layer and the outer layer are separated at the time of use, and a creep phenomenon occurs in which distortion occurs at the nip portion. Wrinkles and paper jams will occur.
【０００８】これらの問題を解決するものとして、耐熱
性多孔質弾性体を円筒状金型内で加熱加硫により発泡さ
せて成型された、表面にスキン層を有する弾性ロール
に、接着剤を介して耐熱性弾性体を被覆するという方法
がある。この二層弾性ロールはピンホールの発生がな
く、研削工程を省くことができるが、内層の成型時に外
径寸法を均一にする目的で金型を使うために、コストの
増加と生産性の低下を招いてしまう。また、接着剤を塗
布する工程が発生し、接着剤が高価であるうえ、スキン
層を有する弾性ロールと耐熱性弾性体とは接着性があま
り良くないという欠点があるため、内外層の結合強度が
高い弾性ロールは得られない。In order to solve these problems, a heat-resistant porous elastic body is foamed by heat vulcanization in a cylindrical mold to form an elastic roll having a skin layer on the surface, and an adhesive is used to bond the elastic roll. There is a method of coating the heat resistant elastic body. This two-layer elastic roll does not generate pinholes, and the grinding process can be omitted.However, since the mold is used for the purpose of making the outer diameter size uniform when molding the inner layer, the cost increases and the productivity decreases. Will be invited. In addition, since the step of applying the adhesive occurs, the adhesive is expensive, and the adhesiveness between the elastic roll having the skin layer and the heat-resistant elastic body is not so good. A high elastic roll cannot be obtained.
【０００９】この他にも、耐熱性多孔質弾性体上に耐熱
性弾性体として収縮チューブを被覆するという方法もあ
るが、これも結合強度が高いとは言えない。In addition to this, there is also a method of covering the shrinkable tube as a heat resistant elastic body on the heat resistant porous elastic body, but this cannot be said to have high bonding strength.
【００１０】本発明はこのような点に基づいてなされた
もので、その目的とするところは、耐熱性多孔質弾性体
を有する二層弾性ロールにおいて、内外層の結合を強固
なものにして、紙皺や紙詰まりが生じない弾性ロールを
提供し、量産性を向上させた二層弾性ロールを経済的に
製造する方法を提供することにある。The present invention has been made on the basis of the above points, and an object thereof is to strengthen the bond between the inner and outer layers in a two-layer elastic roll having a heat resistant porous elastic body, An object of the present invention is to provide an elastic roll that does not cause wrinkles or paper jams, and to provide a method for economically manufacturing a two-layer elastic roll with improved mass productivity.
【００１１】[0011]
【課題を解決するための手段】上記目的を達成するべ
く、本発明による二層弾性ロールは、芯金と、多数の気
泡を有する耐熱性多孔質弾性体からなる内層と、前記内
層の外周に耐熱性弾性体からなる外層とからなり、前記
内外層が前記芯金に周設された二層弾性ロールにおい
て、前記内層と前記外層とが、同時に成型されると共に
加熱加硫されて一体化されていることを特徴とするもの
である。この二層弾性ロールの製造方法は、芯金の周面
上に、耐熱性多孔質弾性体からなる内層と耐熱性弾性体
からなる外層とを同時に押出成型した後、加熱加硫処理
を行なって前記内層を発泡させると共に前記内層と前記
外層とを一体化させて形成することを特徴とするもので
ある。また、この二層弾性ロールの別の製造方法は、耐
熱性多孔質弾性体からなる内層と耐熱性弾性体からなる
外層とを同時に押出成型した後、加熱加硫処理を行なっ
て前記内層を発泡させると共に前記内層と前記外層とを
一体化させて得られるチューブ状二層弾性体に、芯金を
貫装させて二層弾性ロールを形成することを特徴とする
ものである。In order to achieve the above object, a two-layer elastic roll according to the present invention comprises a core metal, an inner layer made of a heat-resistant porous elastic body having a large number of bubbles, and an outer periphery of the inner layer. A two-layer elastic roll comprising an outer layer made of a heat-resistant elastic body, wherein the inner and outer layers are provided around the core metal, and the inner layer and the outer layer are simultaneously molded and heat-vulcanized to be integrated. It is characterized by that. This two-layer elastic roll manufacturing method, on the peripheral surface of the core metal, an inner layer made of a heat-resistant porous elastic body and an outer layer made of a heat-resistant elastic body are simultaneously extrusion-molded, and then heat-vulcanized. It is characterized in that the inner layer is foamed and the inner layer and the outer layer are integrally formed. In addition, another method of manufacturing the two-layer elastic roll is that an inner layer made of a heat-resistant porous elastic body and an outer layer made of a heat-resistant elastic body are simultaneously extrusion-molded, and then heat-vulcanized to foam the inner layer. In addition, a tubular two-layer elastic body obtained by integrating the inner layer and the outer layer is penetrated with a core metal to form a two-layer elastic roll.
【００１２】本発明の内層に使用される耐熱性多孔質弾
性体としては、加熱することによってガスを発生するよ
うな発泡剤を配合したＨＴＶ型シリコーンゴム組成物，
発泡フッ素ゴム等が挙げられる。The heat-resistant porous elastic body used in the inner layer of the present invention is an HTV type silicone rubber composition containing a foaming agent capable of generating a gas when heated.
Examples include foamed fluororubber.
【００１３】本発明の外層に使用される耐熱性弾性体と
しては、内層との加硫一体化が可能な耐摩耗性に優れた
弾性体が良く、耐熱性多孔質弾性体と同一もしくは同系
統の弾性体組成物材料が好ましい。As the heat-resistant elastic body used for the outer layer of the present invention, an elastic body having excellent wear resistance capable of being vulcanized and integrated with the inner layer is preferable, and is the same as or similar to the heat-resistant porous elastic body. The elastic body composition material of is preferable.
【００１４】前記内層と前記外層に配合される加硫剤
は、過酸化物系統，付加系統のいずれの場合でも、前記
内外層が同時に加熱されることから、内層の加硫時間よ
りも外層の加硫時間が遅い配合にして、内層の加硫時の
発泡に伴い発生するガスを、外層の外に逃がす必要があ
る。これには、同じ配合剤を内層と外層の配合量を変え
て配合したり、内層と外層に別々の加硫速度が異なる配
合剤を配合したり、内層と外層に別々の加硫温度が異な
る配合剤を配合したりすることが考えられる。このとき
使用する配合剤は、同系統のものを用いるほうが、加硫
時の内外層の結合がより強固になるため好ましい。The vulcanizing agent blended in the inner layer and the outer layer has a vulcanization time of the outer layer longer than the vulcanization time of the inner layer because the inner and outer layers are simultaneously heated in both cases of peroxide type and addition type. It is necessary to make the composition such that the vulcanization time is slow so that the gas generated due to foaming during vulcanization of the inner layer is allowed to escape to the outside of the outer layer. For this, the same compounding agent is compounded by changing the compounding amounts of the inner layer and the outer layer, the compounding agents having different vulcanization rates are different for the inner layer and the outer layer, and the different vulcanization temperatures are different for the inner layer and the outer layer. It is possible to mix a compounding agent. As the compounding agent used at this time, it is preferable to use the same type of compounding agent because the bond between the inner and outer layers during vulcanization becomes stronger.
【００１５】前記耐熱性多孔質弾性体と前記耐熱性弾性
体のそれぞれの配合と肉厚は、加熱加硫によって一体化
された後のロールまたはチューブの外径が所望の径およ
び硬化度となるように組み合わせればよい。The heat-resistant porous elastic body and the heat-resistant elastic body each have a composition and wall thickness such that the outer diameter of the roll or tube after being integrated by heat vulcanization has a desired diameter and degree of curing. You can combine them as follows.
【００１６】本発明に使用される芯金としては、鋼，ス
テンレス鋼，アルミニウム合金等の円筒形状のものが用
いられ、軽量化のためには中空状としてもよい。また、
その表面には、耐熱性多孔質弾性体である内層との接着
性を高めるために、プライマー処理等の前処理を施して
おくのが好ましい。As the core metal used in the present invention, a cylindrical metal such as steel, stainless steel or aluminum alloy is used, and it may be hollow to reduce the weight. Also,
It is preferable to subject the surface to a pretreatment such as a primer treatment in order to enhance the adhesiveness to the inner layer which is a heat resistant porous elastic body.
【００１７】[0017]
【作用】このような製造方法によって作成された本発明
の二層弾性ロールは、耐熱性多孔質弾性体と耐熱性弾性
体が、同時に成型された後加熱加硫することによって一
体化されるため、接着剤などの介在物なしに強固な結合
強度を有する。In the two-layer elastic roll of the present invention produced by such a manufacturing method, the heat-resistant porous elastic body and the heat-resistant elastic body are integrally molded by being simultaneously vulcanized after being molded. , Has a strong bond strength without inclusions such as adhesives.
【００１８】[0018]
【実施例】以下図１を参照して、本発明の実施例を詳し
く説明する。 ［実施例１］前処理としてシリコーン系接着剤［ＭＥ−
２１：東芝シリコーン（株）製］の塗布を施した外径６
ｍｍの芯金１の周面に、二層押出機を使用して、耐熱性
多孔質弾性体としてシリコーン系発泡剤［ＭＥ−８０
０：東芝シリコーン（株）製］と過酸化物系統の２種類
のシリコーン系加硫剤［ＴＣ−２およびＴＣ−７：東芝
シリコーン（株）製］を配合した硬度（ＪＩＳ−Ａ）３
５の発泡シリコーンゴムを内層２とし、耐熱性弾性体と
して過酸化物系統のシリコーン系加硫剤［ＴＣ−２：東
芝シリコーン（株）製］を配合した硬度（ＪＩＳ−Ａ）
４０のシリコーンゴムを外層３として、同時押出成型
し、内層２と外層３が積層された外径１１ｍｍのロール
を得た。これを加熱機に入れて加熱すると、内層が発泡
しながら膨張し始め、これにより外層にストレッチがか
かる。内層より発生した発泡ガスは内層側面および加硫
中の外層を通り抜け、発泡がおさまり加硫し終わった後
外層が遅れて加硫し終わった。加熱加硫されたロールを
フレのないよう研削形成して外径１４ｍｍの二層弾性ロ
ールを製造した。この完成品は、硬度（ＪＩＳ−Ａ）２
５であった。また、内層と外層の結合を確認したとこ
ろ、層との境をはっきりさせながら一体化されていた。Embodiments of the present invention will be described in detail below with reference to FIG. [Example 1] Silicone adhesive [ME-
21: Toshiba Silicone Co., Ltd.] coated outer diameter 6
Using a two-layer extruder on the peripheral surface of the core metal 1 having a diameter of mm, a silicone-based foaming agent [ME-80 is used as a heat-resistant porous elastic body.
0: manufactured by Toshiba Silicone Co., Ltd.] and two types of peroxide-based silicone vulcanizing agents [TC-2 and TC-7: manufactured by Toshiba Silicone Co., Ltd.] hardness (JIS-A) 3
Hardness (JIS-A) in which the foamed silicone rubber of No. 5 was used as the inner layer 2 and a peroxide-based silicone vulcanizing agent [TC-2: manufactured by Toshiba Silicone Co., Ltd.] was blended as a heat resistant elastic body.
Simultaneous extrusion molding was performed using 40 silicone rubber as the outer layer 3 to obtain a roll having an outer diameter of 11 mm in which the inner layer 2 and the outer layer 3 were laminated. When this is placed in a heater and heated, the inner layer begins to expand while foaming, which causes the outer layer to stretch. The foaming gas generated from the inner layer passed through the side surface of the inner layer and the outer layer during vulcanization, and after the foaming was stopped and the vulcanization was completed, the outer layer was delayed and vulcanized. The heat-vulcanized roll was ground and formed so as not to shake to produce a two-layer elastic roll having an outer diameter of 14 mm. This finished product has a hardness (JIS-A) of 2
It was 5. Also, when the bonding between the inner layer and the outer layer was confirmed, it was found that the boundary with the layer was integrated.
【００１９】実施例１の製造方法の手順は次のとおりで
ある。 イ．耐熱性多孔質弾性体の内層と耐熱性弾性体の外層
を、二層押出機により芯金に同時押出する。 ロ．押出成型された二層ロールを加熱加硫して一体化さ
せる。 ハ．冷却後、耐熱性弾性体の層を研削形成する。The procedure of the manufacturing method of Example 1 is as follows. I. The inner layer of the heat-resistant porous elastic body and the outer layer of the heat-resistant elastic body are simultaneously extruded on the core metal by a two-layer extruder. B. The extruded two-layer roll is heated and vulcanized to be integrated. C. After cooling, a layer of the heat resistant elastic body is formed by grinding.
【００２０】［実施例２］実施例１と同じ材料，同じ機
器，同じ条件で、二層押出機を使用して、内層２と外層
３を同時押出成型し、内層２と外層３が積層された外径
１１ｍｍの二層チューブを得た。この二層チューブを加
熱加硫した後、接着剤の前処理を施した外径６ｍｍの芯
金を挿入し、この接着剤を硬化させるため２００℃の電
気炉で１０分間加熱した。冷却後、二層弾性ロールをフ
レのないよう研削形成して外径１４ｍｍの二層弾性ロー
ルを製造した。この完成品も実施例１で得られた二層弾
性ロールと同様のものであった。[Embodiment 2] The inner layer 2 and the outer layer 3 were co-extruded using the same material, the same equipment and the same conditions as those of the embodiment 1, using a two-layer extruder, and the inner layer 2 and the outer layer 3 were laminated. A two-layer tube having an outer diameter of 11 mm was obtained. After heating and vulcanizing this two-layer tube, a core metal having an outer diameter of 6 mm, which had been pretreated with an adhesive, was inserted and heated in an electric furnace at 200 ° C. for 10 minutes to cure the adhesive. After cooling, the two-layer elastic roll was formed by grinding so as not to shake, thereby producing a two-layer elastic roll having an outer diameter of 14 mm. This finished product was also the same as the two-layer elastic roll obtained in Example 1.
【００２１】実施例２の製造方法の手順は次のとおりで
ある。 イ．耐熱性多孔質弾性体の内層と耐熱性弾性体の外層
を、二層押出機により同時押出する。 ロ．押出成型された二層チューブを加熱加硫して一体化
させる。 ハ．冷却後、二層チューブに芯金を挿入して加熱接着さ
せる。 ニ．冷却後、耐熱性弾性体の層を研削形成する。The procedure of the manufacturing method of Example 2 is as follows. I. The inner layer of the heat resistant porous elastic body and the outer layer of the heat resistant elastic body are simultaneously extruded by a two-layer extruder. B. The extruded two-layer tube is heat-vulcanized and integrated. C. After cooling, a cored bar is inserted into the two-layer tube and heat bonded. D. After cooling, a layer of the heat resistant elastic body is formed by grinding.
【００２２】[0022]
【比較例】実施例１と同じ材料を使用して、耐熱性多孔
質弾性体を押出成型および加熱加硫した外径１０ｍｍの
弾性ロールに、耐熱性弾性体を押出成型および加熱加硫
するという、従来の製造方法で上記実施例の各層と同じ
肉厚の二層弾性ロールを製造した。Comparative Example Using the same material as in Example 1, a heat resistant porous elastic body was extruded and heat vulcanized to an elastic roll having an outer diameter of 10 mm, and the heat resistant elastic body was extruded and heat vulcanized. A two-layer elastic roll having the same thickness as each layer of the above-described example was manufactured by the conventional manufacturing method.
【００２３】従来の製造方法の手順は次のとおりであ
る。 イ．芯金に耐熱性多孔質弾性体を押出成型する。 ロ．耐熱性多孔質弾性体を加熱加硫して発泡させる。 ハ．冷却後、耐熱性多孔質弾性体の層を研削形成する。 ニ．耐熱性多孔質弾性体の表面に接着剤を塗布する。 ホ．研削成型後の耐熱性多孔質弾性体の層に耐熱性弾性
体を押出成型する。 ヘ．耐熱性弾性体を加熱加硫する。 ト．冷却後、耐熱性弾性体の層を研削形成する。The procedure of the conventional manufacturing method is as follows. I. A heat resistant porous elastic body is extruded on a core metal. B. The heat-resistant porous elastic body is vulcanized by heating and vulcanization. C. After cooling, a layer of the heat resistant porous elastic body is formed by grinding. D. An adhesive is applied to the surface of the heat resistant porous elastic body. E. The heat-resistant elastic body is extruded into a layer of the heat-resistant porous elastic body after grinding and molding. F. The heat resistant elastic body is heated and vulcanized. G. After cooling, a layer of the heat resistant elastic body is formed by grinding.
【００２４】実施例１，実施例２および比較例で製造さ
れた二層弾性ロールを、１８０℃雰囲気中で回転ロール
に２０ｋｇｆで押し付けながら周速３００ｃｍ／ｍｉｎ
で回転させた。実施例１と実施例２は５日経っても、耐
熱性多孔質弾性体と耐熱性弾性体との剥離は生じなかっ
た。しかし、比較例は３日で、耐熱性多孔質弾性体と耐
熱性弾性体との剥離が生じてしまった。The two-layer elastic rolls manufactured in Examples 1, 2 and Comparative Example were pressed against a rotating roll at 20 kgf in an atmosphere of 180 ° C. and a peripheral speed of 300 cm / min.
I rotated it. In Example 1 and Example 2, no peeling occurred between the heat resistant porous elastic body and the heat resistant elastic body even after 5 days. However, in the comparative example, the heat-resistant porous elastic body and the heat-resistant elastic body were peeled off within 3 days.
【００２５】本発明は実施例に限定されるものではな
い。本文では加圧ロールについて説明したが、内層また
は外層に導電剤を配合すれば帯電ロール，転写ロール，
現像ロールとすることもできる。The present invention is not limited to the examples. Although the pressure roll was explained in the text, if a conductive agent is mixed in the inner layer or the outer layer, the charging roll, the transfer roll,
It can also be a developing roll.
【００２６】[0026]
【発明の効果】以上詳述したように、本発明によれば、
内層と外層を同時成型，同時加硫して内外層が一体化さ
れているので、接着剤を使用しなくても強固な結合強度
とすることができ、使用中の内外層剥離という欠陥が起
こらない。また、製造方法についても、従来の方法は複
雑な工程が必要となるが、本発明の方法は従来と比べ３
〜４工程が省略され、簡略した工程となる。このような
ことから、耐熱性多孔質弾性体の内層と耐熱性弾性体の
外層による二層弾性ロールの特性であるニップ幅の確
保，小径化の対応に優れている。この特性を維持しつつ
耐久性を向上させながら、金型を使わない製造方法によ
り、生産性が良く且つ製造工程が簡略化された経済的
な、二層弾性ロールを提供することができる。As described in detail above, according to the present invention,
Since the inner and outer layers are integrated by simultaneous molding and vulcanization of the inner and outer layers, a strong bond strength can be achieved without the use of an adhesive, causing the defect of peeling the inner and outer layers during use. Absent. Also, regarding the manufacturing method, the conventional method requires complicated steps, but the method of the present invention requires 3 steps as compared with the conventional method.
The ~ 4 steps are omitted and the steps are simplified. Therefore, the inner layer of the heat-resistant porous elastic body and the outer layer of the heat-resistant elastic body are excellent in securing the nip width and reducing the diameter, which are the characteristics of the two-layer elastic roll. It is possible to provide an economical two-layer elastic roll having good productivity and a simplified manufacturing process by a manufacturing method that does not use a mold while maintaining this property and improving durability.
【図１】二層弾性ロールの構造断面図である。FIG. 1 is a structural cross-sectional view of a two-layer elastic roll.
１…芯金 ２…内層（耐熱性多孔質弾性体） ３…外層（耐熱性弾性体） 1 ... Core metal 2 ... Inner layer (heat resistant porous elastic body) 3 ... Outer layer (heat resistant elastic body)
Claims (3)
質弾性体からなる内層と、前記内層の外周に耐熱性弾性
体からなる外層とからなり、前記内外層が前記芯金に周
設された二層弾性ロールにおいて、前記内層と前記外層
とが、同時に成型されると共に加熱加硫されて一体化さ
れていることを特徴とする二層弾性ロール。1. A cored bar, an inner layer made of a heat-resistant porous elastic body having a large number of bubbles, and an outer layer made of a heat-resistant elastic body on the outer periphery of the inner layer, wherein the inner and outer layers surround the cored bar. In the provided two-layer elastic roll, the two-layer elastic roll is characterized in that the inner layer and the outer layer are simultaneously molded and heat-vulcanized to be integrated.
らなる内層と耐熱性弾性体からなる外層とを同時に押出
成型した後、加熱加硫処理を行なって前記内層を発泡さ
せると共に前記内層と前記外層とを一体化させて形成す
ることを特徴とする二層弾性ロールの製造方法。2. An inner layer made of a heat-resistant porous elastic body and an outer layer made of a heat-resistant elastic body are simultaneously extrusion-molded on the peripheral surface of a core metal, and then heat vulcanization is performed to foam the inner layer. A method for manufacturing a two-layer elastic roll, characterized in that the inner layer and the outer layer are integrally formed together.
性弾性体からなる外層とを同時に押出成型した後、加熱
加硫処理を行なって前記内層を発泡させると共に前記内
層と前記外層とを一体化させて得られるチューブ状二層
弾性体に、芯金を貫装させて二層弾性ロールを形成する
ことを特徴とする二層弾性ロールの製造方法。3. An inner layer made of a heat-resistant porous elastic body and an outer layer made of a heat-resistant elastic body are simultaneously extrusion-molded, and then heat vulcanized to foam the inner layer, and at the same time, the inner layer and the outer layer are formed. A method for producing a two-layer elastic roll, comprising forming a two-layer elastic roll by inserting a core metal into a tubular two-layer elastic body obtained by being integrated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4122995A JPH08211774A (en) | 1995-02-06 | 1995-02-06 | Double layer elastic roll and its production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4122995A JPH08211774A (en) | 1995-02-06 | 1995-02-06 | Double layer elastic roll and its production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08211774A true JPH08211774A (en) | 1996-08-20 |
Family
ID=12602586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4122995A Pending JPH08211774A (en) | 1995-02-06 | 1995-02-06 | Double layer elastic roll and its production |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08211774A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002156857A (en) * | 2000-11-21 | 2002-05-31 | Nissei Electric Co Ltd | Fixing roll and method of manufacturing the same |
| JP2002258661A (en) * | 2001-03-05 | 2002-09-11 | Ricoh Co Ltd | Fixing device and image forming apparatus having the fixing device |
| JP2015004835A (en) * | 2013-06-21 | 2015-01-08 | 株式会社リコー | Fixing member, fixing apparatus, and image forming apparatus |
| CN104843512A (en) * | 2014-02-17 | 2015-08-19 | 新智德株式会社 | Roller for feeding, conveying, and separating paper, and manufacturing method therefor |
-
1995
- 1995-02-06 JP JP4122995A patent/JPH08211774A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002156857A (en) * | 2000-11-21 | 2002-05-31 | Nissei Electric Co Ltd | Fixing roll and method of manufacturing the same |
| JP2002258661A (en) * | 2001-03-05 | 2002-09-11 | Ricoh Co Ltd | Fixing device and image forming apparatus having the fixing device |
| JP2015004835A (en) * | 2013-06-21 | 2015-01-08 | 株式会社リコー | Fixing member, fixing apparatus, and image forming apparatus |
| CN104843512A (en) * | 2014-02-17 | 2015-08-19 | 新智德株式会社 | Roller for feeding, conveying, and separating paper, and manufacturing method therefor |
| US9394131B2 (en) | 2014-02-17 | 2016-07-19 | Synztec Co., Ltd. | Roller for feeding, conveying, and separating paper, and manufacturing method therefor |
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