JPH04264479A - Fixing roller device and manufacture of its heating roller - Google Patents
Fixing roller device and manufacture of its heating rollerInfo
- Publication number
- JPH04264479A JPH04264479A JP2480091A JP2480091A JPH04264479A JP H04264479 A JPH04264479 A JP H04264479A JP 2480091 A JP2480091 A JP 2480091A JP 2480091 A JP2480091 A JP 2480091A JP H04264479 A JPH04264479 A JP H04264479A
- Authority
- JP
- Japan
- Prior art keywords
- roller
- heating roller
- fixing
- heating
- induction heating
- 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
- 238000010438 heat treatment Methods 0.000 title claims abstract description 61
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 239000000843 powder Substances 0.000 claims abstract description 21
- 230000005294 ferromagnetic effect Effects 0.000 claims abstract description 14
- 230000006698 induction Effects 0.000 claims abstract description 14
- 239000012790 adhesive layer Substances 0.000 claims abstract description 9
- 239000011248 coating agent Substances 0.000 claims abstract description 5
- 238000000576 coating method Methods 0.000 claims abstract description 5
- 239000011347 resin Substances 0.000 claims description 16
- 229920005989 resin Polymers 0.000 claims description 16
- 239000010410 layer Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 239000000853 adhesive Substances 0.000 claims description 5
- 230000001070 adhesive effect Effects 0.000 claims description 5
- 239000003302 ferromagnetic material Substances 0.000 claims description 4
- 238000005498 polishing Methods 0.000 claims description 3
- 239000011247 coating layer Substances 0.000 claims 1
- 230000005389 magnetism Effects 0.000 abstract description 6
- 230000007423 decrease Effects 0.000 description 3
- 238000010304 firing Methods 0.000 description 3
- 229910052736 halogen Inorganic materials 0.000 description 2
- 150000002367 halogens Chemical class 0.000 description 2
- 229920001774 Perfluoroether Polymers 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000005291 magnetic effect Effects 0.000 description 1
- 239000006247 magnetic powder Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Landscapes
- Fixing For Electrophotography (AREA)
- General Induction Heating (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、電子写真装置の定着ロ
ーラ装置及びその加熱ローラの製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixing roller device for an electrophotographic apparatus and a method for manufacturing its heating roller.
【０００２】0002
【従来の技術】電子写真複写機、静電プリンタ、ファク
シミリ等の電子写真プロセスを利用した装置の、未定着
トナー像を転写紙上に定着する定着装置としては、円筒
状芯金の表面に離型性樹脂被膜を形成して成る加熱ロー
ラと、これに圧接し、弾性体層を表面に有する加圧ロー
ラとを備え、加熱ローラの表面温度が所定の定着温度に
達した状態で、加熱ローラと加圧ローラとのニップ部に
未定着トナー像を担持する転写紙を、トナー像面が加熱
ローラに接するように通紙して熱と圧力によりトナー像
を転写紙面に融着させて定着させる熱ローラ定着装置（
定着ローラ装置）が広く使用されている。[Prior Art] A fixing device for fixing an unfixed toner image onto a transfer paper in a device using an electrophotographic process such as an electrophotographic copying machine, an electrostatic printer, or a facsimile machine is used to release a mold onto the surface of a cylindrical core metal. The heating roller is equipped with a heating roller formed with an elastic resin coating, and a pressure roller that is in pressure contact with the heating roller and has an elastic layer on its surface.When the surface temperature of the heating roller reaches a predetermined fixing temperature, A transfer paper carrying an unfixed toner image is passed through the nip with the pressure roller so that the toner image surface is in contact with the heating roller, and heat and pressure are used to fuse and fix the toner image to the transfer paper surface. Roller fixing device (
fusing roller devices) are widely used.
【０００３】従来、この方式の定着装置の加熱ローラの
加熱方式としては、加熱ローラの中空芯金の中空部に熱
源としてハロゲンランプが挿入され、加熱ローラの表面
に接触又は近接させてサーミスタを設け、加熱ローラ表
面温度を検知して、ハロゲンランプの電源をオン・オフ
制御して加熱ローラの表面を所定の定着温度に保持する
方式が一般に採用されている。Conventionally, as a heating method for the heating roller of this type of fixing device, a halogen lamp is inserted as a heat source into the hollow part of the hollow core of the heating roller, and a thermistor is provided in contact with or near the surface of the heating roller. Generally, a method is adopted in which the surface temperature of the heating roller is detected and the power of a halogen lamp is controlled on and off to maintain the surface of the heating roller at a predetermined fixing temperature.
【０００４】ところが、この方式の場合、装置本体の電
源投入から定着装置の加熱ローラ表面温度が所定の定着
温度に達する迄の立上り時間が数分も必要であり、又、
サーミスタ及びリレーなどの周辺装置が必要であり機構
が複雑になる欠点があった。また、この方式では温度制
御精度が悪く、画質の不安定にもつながり、特に連続通
紙時、加熱ローラ表面温度低下が著しく、定着率低下等
の問題が発生している。However, in the case of this method, it takes several minutes for the surface temperature of the heating roller of the fixing device to reach the predetermined fixing temperature after the power is turned on to the main body of the apparatus.
This has the disadvantage that peripheral devices such as a thermistor and a relay are required, making the mechanism complicated. In addition, this system has poor temperature control accuracy, leading to unstable image quality, and particularly during continuous paper feeding, the surface temperature of the heating roller decreases significantly, causing problems such as a decrease in fixing rate.
【０００５】[0005]
【発明が解決しようとする課題】本発明は、従来の上記
方式の定着装置の上記の問題点にかんがみ、短時間で加
熱ローラが所定の定着温度に達し、かつ複雑な制御装置
を必要とすることなく、高精度の温度制御が可能であり
、連続通紙時にもローラ表面温度の低下の少ない定着ロ
ーラ装置及び、その加熱ローラの製造方法を提供するこ
とを課題とする。SUMMARY OF THE INVENTION In view of the above-mentioned problems of the conventional fixing device of the above-mentioned type, the present invention aims to solve the problem that the heating roller reaches a predetermined fixing temperature in a short period of time and requires a complicated control device. It is an object of the present invention to provide a fixing roller device that enables highly accurate temperature control without causing heat transfer, and that reduces the decrease in roller surface temperature even during continuous sheet feeding, and a method for manufacturing the heating roller.
【０００６】[0006]
【課題を解決するための手段】本発明の定着ローラ装置
は、上記の課題を解決するため、加熱ローラ芯金表面に
離型性被膜を接着する接着剤中にキューリー点が概ね定
着温度である強磁性体粉末が分散されているとともに、
加熱ローラに近接して、高周波電源により高周波電圧が
印加される誘導加熱コイルから成る高周波誘導加熱装置
を備えたことを特徴とする。[Means for Solving the Problems] In order to solve the above-mentioned problems, the fixing roller device of the present invention has a Curie point in the adhesive that adheres the release film to the surface of the heating roller core metal, which is approximately the fixing temperature. Ferromagnetic powder is dispersed,
The present invention is characterized in that a high-frequency induction heating device including an induction heating coil to which a high-frequency voltage is applied by a high-frequency power source is provided in close proximity to the heating roller.
【０００７】又、本発明による定着ローラの加熱ローラ
の製造方法は、円筒状芯金表面に強磁性体粉末を分散さ
せた接着剤層を形成する工程、その上に離型性樹脂粉末
を静電粉体塗装する工程、加熱炉で焼成して離型性樹脂
層を焼付ける工程、及び焼付けられた離型性樹脂層表面
を研磨する工程をこの順に含んでいることを特徴とする
。The method for manufacturing a heating roller for a fixing roller according to the present invention includes a step of forming an adhesive layer in which ferromagnetic powder is dispersed on the surface of a cylindrical core metal, and statically applying mold release resin powder thereon. It is characterized in that it includes a step of applying electric powder coating, a step of baking the mold release resin layer by firing in a heating furnace, and a step of polishing the surface of the baked mold release resin layer in this order.
【０００８】[0008]
【作用】上記定着ローラ装置の構成により、高周波誘導
加熱装置により接着剤中に含有された強磁性体がキュー
リー点に達する迄瞬時に昇温し、キューリー点に達する
と磁性を失なうことにより、昇温せず、一定の温度を保
持する。この強磁性体のキューリー点は概ね定着温度に
設定されているので、強磁性体は概ね定着温度に保持さ
れる。[Operation] With the configuration of the fixing roller device described above, the temperature of the ferromagnetic material contained in the adhesive is instantaneously raised by the high-frequency induction heating device until it reaches the Curie point, and when it reaches the Curie point, it loses its magnetism. , maintains a constant temperature without increasing the temperature. Since the Curie point of this ferromagnetic material is set approximately at the fixing temperature, the ferromagnetic material is maintained at approximately the fixing temperature.
【０００９】[0009]
【実施例】以下に、本発明の実施例を、図面に基づいて
詳細に説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described below in detail with reference to the drawings.
【００１０】図１は、本発明の定着ローラ装置の加熱ロ
ーラ１の断面図である。加熱ローラ１は円筒状芯金２に
、強磁性体粉末が分散された接着剤層３と離型性樹脂層
４とが順次積層されて構成されている。芯金２はアルミ
ニウムで作られている。接着剤層３は、ＭｎＺｎ系フェ
ライト等の強磁性体粉末を接着剤中に分散させて構成さ
れている。FIG. 1 is a sectional view of a heating roller 1 of a fixing roller device according to the present invention. The heating roller 1 is constructed by sequentially laminating a cylindrical core metal 2, an adhesive layer 3 in which ferromagnetic powder is dispersed, and a release resin layer 4. The core metal 2 is made of aluminum. The adhesive layer 3 is constructed by dispersing ferromagnetic powder such as MnZn ferrite in an adhesive.
【００１１】離型性樹脂層４は、接着剤層３上に焼付け
られることによって形成される。その好適な例を具体的
に示せば、パーフロロアルコキシ樹脂を藤成分とする離
型性樹脂粉末を接着剤層３上に静電粉体塗装する。焼付
は、加熱炉で焼成して行なわれる。焼成のための加熱温
度は、３６０℃前後である。また、この離型性樹脂層４
は、焼付けられた後、砥石あるいはバフ等の研磨手段に
よって表面を研磨される。なお、離型性樹脂層４の厚さ
は約２０〜３０μｍである。The releasable resin layer 4 is formed by baking onto the adhesive layer 3. To give a concrete example of this, a releasable resin powder containing a perfluoroalkoxy resin as a component is electrostatically powder coated onto the adhesive layer 3. Baking is performed by firing in a heating furnace. The heating temperature for firing is around 360°C. Moreover, this mold release resin layer 4
After being baked, the surface is polished by a polishing means such as a grindstone or a buff. Note that the thickness of the releasable resin layer 4 is about 20 to 30 μm.
【００１２】上記のように構成された加熱ローラ１は、
加圧ローラ６と組合せて熱定着ローラ装置５を構成する
。加熱ローラ１に近接して、これと平行に誘導加熱コイ
ル７が設けられ、このコイル７には高周波電源６から高
周波交流電圧が印加される。The heating roller 1 configured as described above has the following features:
In combination with the pressure roller 6, a heat fixing roller device 5 is configured. An induction heating coil 7 is provided close to and parallel to the heating roller 1, and a high frequency AC voltage is applied to this coil 7 from a high frequency power source 6.
【００１３】接着剤層３に分散される強磁性体粉末のキ
ューリー点は約１８０℃であり、この温度で強磁性体粉
末は磁性がなくなる。したがって、誘導加熱コイル７に
高周波電源６から交流を印加すると、強磁性体粉末が磁
性を有する状態では、強磁性体粉末に大電流が流れて高
度に加熱される。しかし、強磁性体粉末が加熱によりキ
ューリー点に達すると磁性を失うので、誘導加熱が行な
われなくなり、加熱ローラ１の表面は所定の定着温度を
維持する。連続通紙により、加熱ローラの温度がキュー
リー点より下れば、誘導加熱により急速に加熱されるの
で、連続通紙時にも温度低下は殆んどみられない。The Curie point of the ferromagnetic powder dispersed in the adhesive layer 3 is about 180° C., and the ferromagnetic powder loses its magnetism at this temperature. Therefore, when alternating current is applied to the induction heating coil 7 from the high frequency power source 6, a large current flows through the ferromagnetic powder in a state where the ferromagnetic powder has magnetism, and is heated to a high degree. However, when the ferromagnetic powder reaches its Curie point due to heating, it loses its magnetism, so induction heating is no longer performed, and the surface of the heating roller 1 maintains a predetermined fixing temperature. If the temperature of the heating roller falls below the Curie point due to continuous paper passing, it is rapidly heated by induction heating, so that there is hardly any temperature drop during continuous paper passing.
【００１４】上記の実施例の装置を用いて通紙試験を行
なった結果、加熱ローラ１の表面が定着温度の１８０℃
になるのに掛った時間は約２〜３秒であり、連続通紙時
の加熱ローラ１の表面温度の変動は±１℃程度であった
。As a result of conducting a paper passing test using the apparatus of the above embodiment, it was found that the surface of the heating roller 1 was at a fixing temperature of 180°C.
It took about 2 to 3 seconds to achieve this, and the fluctuation in the surface temperature of the heating roller 1 during continuous paper feeding was about ±1°C.
【００１５】[0015]
【発明の効果】以上の如く、本発明によれば、定着ロー
ラ装置として要求される加熱ローラ表面の高離型性、耐
熱性等を損うことなく、又複雑な制御装置を必要とする
ことなく、加熱ローラの立上り時間の短縮及び高精度の
温度制御を行なうことができる。As described above, according to the present invention, the high releasability, heat resistance, etc. of the heating roller surface required for a fixing roller device are not impaired, and a complicated control device is not required. Therefore, it is possible to shorten the rise time of the heating roller and perform highly accurate temperature control.
【００１６】芯金や離型性樹脂層の厚みや形状が異る加
熱ローラにおいては、その熱容量も異るが、強磁性体粉
末の含有量を調整することにより、立上り時間、制御温
度の精度向上を図ることができる。Heating rollers with different thicknesses and shapes of core metals and release resin layers have different heat capacities, but by adjusting the content of ferromagnetic powder, the precision of rise time and control temperature can be improved. You can improve your performance.
【００１７】又、強磁性体粉末はキューリー点で磁性を
失うので、磁性粉末を含むトナーが磁力で加熱ローラに
吸引され、オフセット等が発生することもない。Furthermore, since the ferromagnetic powder loses its magnetism at the Curie point, the toner containing the magnetic powder is attracted to the heating roller by magnetic force, and no offset or the like occurs.
【図１】本発明による定着ローラ装置の加熱ローラの構
成を示す断面図である。FIG. 1 is a sectional view showing the configuration of a heating roller of a fixing roller device according to the present invention.
【図２】本発明の定着ローラ装置の構成を示す斜視図で
ある。FIG. 2 is a perspective view showing the configuration of the fixing roller device of the present invention.
１ 加熱ローラ ２ 芯金 ３ 接着剤層 ４ 離型性樹脂被膜部 ５ 定着ローラ装置 ６ 加圧ローラ ７ 誘導加熱コイル ８ 高周波電源 1 Heating roller 2 Core metal 3 Adhesive layer 4 Releasable resin coating part 5 Fixing roller device 6 Pressure roller 7 Induction heating coil 8 High frequency power supply
Claims (2)
剤で接合されて成る加熱ローラと、これに圧接する加圧
ローラとを備え、上記加熱ローラが所定の定着温度に達
した状態で、未定着トナーを表面に担持する転写紙を、
該トナー担持面が上記加熱ローラに接するように上記ロ
ーラ対のニップ部に通紙して定着を行なう定着ローラ装
置において、上記の接着剤中にキューリー点が概ね上記
の定着温度である強磁性体粉末が分散されているととも
に、加熱ローラに近接して、高周波電源により高周波電
圧が印加される誘導加熱コイルから成る高周波誘導加熱
装置を備えたことを特徴とする定着ローラ装置。1. A heating roller comprising a releasable resin coating layer bonded to the surface of a cylindrical core metal with an adhesive, and a pressure roller in pressure contact with the heating roller, the heating roller reaching a predetermined fixing temperature. In this state, transfer paper that carries unfixed toner on its surface,
In a fixing roller device that performs fixing by passing a sheet through the nip portion of the pair of rollers so that the toner carrying surface is in contact with the heating roller, a ferromagnetic material whose Curie point is approximately the above fixing temperature is included in the adhesive. A fixing roller device comprising a high-frequency induction heating device comprising an induction heating coil in which powder is dispersed and to which a high-frequency voltage is applied by a high-frequency power supply close to the heating roller.
の製造方法において、該製造方法は円筒状芯金表面に強
磁性体粉末を分散させた接着剤層を形成する工程、その
上に離型性樹脂粉末を静電粉体塗装する工程、加熱炉で
焼成して離型性樹脂層を焼付ける工程、及び焼付けられ
た離型性樹脂層表面を研磨する工程をこの順に有するこ
とを特徴とする製造方法。2. A method for manufacturing a heating roller for a fixing roller according to claim 1, which includes the step of forming an adhesive layer in which ferromagnetic powder is dispersed on the surface of a cylindrical core; The method includes, in this order, a step of electrostatically powder coating a mold release resin powder, a step of baking the mold release resin layer by baking it in a heating furnace, and a step of polishing the surface of the baked mold release resin layer. Characteristic manufacturing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3024800A JP2975435B2 (en) | 1991-02-19 | 1991-02-19 | Fixing device, heated rotator and method of manufacturing the heated rotator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3024800A JP2975435B2 (en) | 1991-02-19 | 1991-02-19 | Fixing device, heated rotator and method of manufacturing the heated rotator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04264479A true JPH04264479A (en) | 1992-09-21 |
| JP2975435B2 JP2975435B2 (en) | 1999-11-10 |
Family
ID=12148274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3024800A Expired - Fee Related JP2975435B2 (en) | 1991-02-19 | 1991-02-19 | Fixing device, heated rotator and method of manufacturing the heated rotator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2975435B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07114276A (en) * | 1993-10-18 | 1995-05-02 | Canon Inc | Image heating device |
| US7390995B2 (en) | 2005-06-01 | 2008-06-24 | Ricoh Company, Limited | Image forming apparatus, fixing device and image heater having an adjustable exciting member |
| US7700896B2 (en) | 2006-06-22 | 2010-04-20 | Canon Kabushiki Kaisha | Image heating device using induction heating system |
| US8014711B2 (en) | 2006-07-31 | 2011-09-06 | Ricoh Company, Ltd. | Fixing unit having enhanced temperature control and image forming apparatus using the same |
| US8637632B2 (en) | 2005-11-25 | 2014-01-28 | Fuji Xerox Co., Ltd. | Method for producing binder resin, particulate resin dispersion and method for producing same, electrostatic image development toner and method for producing same, electrostatic image developer, and image forming method |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7122769B2 (en) | 2003-12-25 | 2006-10-17 | Canon Kabushiki Kaisha | Induction heating apparatus for image fixing |
| JP2008216825A (en) | 2007-03-07 | 2008-09-18 | Ricoh Co Ltd | Fixing device, image forming apparatus using the same |
| JP5177348B2 (en) | 2007-03-12 | 2013-04-03 | 株式会社リコー | Fixing device and image forming apparatus using the same |
| JP2008233790A (en) | 2007-03-23 | 2008-10-02 | Ricoh Co Ltd | Fixing device and image forming apparatus using the same |
| JP5510727B2 (en) | 2010-06-21 | 2014-06-04 | 株式会社リコー | Fixing apparatus and image forming apparatus |
-
1991
- 1991-02-19 JP JP3024800A patent/JP2975435B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07114276A (en) * | 1993-10-18 | 1995-05-02 | Canon Inc | Image heating device |
| US7390995B2 (en) | 2005-06-01 | 2008-06-24 | Ricoh Company, Limited | Image forming apparatus, fixing device and image heater having an adjustable exciting member |
| US8637632B2 (en) | 2005-11-25 | 2014-01-28 | Fuji Xerox Co., Ltd. | Method for producing binder resin, particulate resin dispersion and method for producing same, electrostatic image development toner and method for producing same, electrostatic image developer, and image forming method |
| US7700896B2 (en) | 2006-06-22 | 2010-04-20 | Canon Kabushiki Kaisha | Image heating device using induction heating system |
| US8014711B2 (en) | 2006-07-31 | 2011-09-06 | Ricoh Company, Ltd. | Fixing unit having enhanced temperature control and image forming apparatus using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2975435B2 (en) | 1999-11-10 |
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