JPH0572935A - Production of heat fixing roll of fixing device - Google Patents
Production of heat fixing roll of fixing deviceInfo
- Publication number
- JPH0572935A JPH0572935A JP4590792A JP4590792A JPH0572935A JP H0572935 A JPH0572935 A JP H0572935A JP 4590792 A JP4590792 A JP 4590792A JP 4590792 A JP4590792 A JP 4590792A JP H0572935 A JPH0572935 A JP H0572935A
- Authority
- JP
- Japan
- Prior art keywords
- heat
- fixing
- roll
- fixing roll
- shrinkable tube
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 229910052731 fluorine Inorganic materials 0.000 claims abstract description 26
- 239000011737 fluorine Substances 0.000 claims abstract description 26
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims abstract description 25
- 230000002093 peripheral effect Effects 0.000 claims abstract description 8
- 239000011248 coating agent Substances 0.000 claims abstract description 7
- 238000000576 coating method Methods 0.000 claims abstract description 7
- 238000005422 blasting Methods 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims description 9
- 239000002184 metal Substances 0.000 description 17
- 238000000034 method Methods 0.000 description 15
- 239000004945 silicone rubber Substances 0.000 description 10
- 229920006015 heat resistant resin Polymers 0.000 description 8
- 229920002379 silicone rubber Polymers 0.000 description 8
- 239000011247 coating layer Substances 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 210000000078 claw Anatomy 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 230000003746 surface roughness Effects 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- -1 polytetrafluoroethylene Polymers 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 229920002631 room-temperature vulcanizate silicone Polymers 0.000 description 2
- 238000007788 roughening Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000004073 vulcanization Methods 0.000 description 2
- 229920002943 EPDM rubber Polymers 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 150000002221 fluorine Chemical class 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- TXEYQDLBPFQVAA-UHFFFAOYSA-N tetrafluoromethane Chemical compound FC(F)(F)F TXEYQDLBPFQVAA-UHFFFAOYSA-N 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Landscapes
- Fixing For Electrophotography (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、電子写真複写機、同
ファクシミリ、同プリンタ等、電子写真プロセスを利用
した機器に使用される定着装置に係り、特に、加熱定着
法を採用した定着装置における加熱定着ロールの製造方
法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixing device used in a device utilizing an electrophotographic process such as an electrophotographic copying machine, a facsimile machine and a printer, and more particularly to a fixing device employing a heat fixing method. The present invention relates to a method for manufacturing a heat fixing roll.
【０００２】[0002]
【従来の技術】従来、電子写真プロセスを利用した複写
機等においては、用紙上に形成された未定着トナー像を
定着して永久画像にする必要があり、その定着法として
溶剤定着法、圧力定着法及び加熱定着法等が知られてい
る。しかし、上記溶剤定着法は、溶剤蒸気が飛散し、臭
気や衛生上の問題点が多い欠点を有しており、一方、圧
力定着法も他の定着法と較べ定着性が悪く、かつ、圧力
適応性トナーが高価である欠点を有しており、共に広く
実用化されていないのが現状である。従って、未定着ト
ナー像の定着には、一般に加熱によってトナーを溶融さ
せ、用紙上に付着させる加熱定着法が広く採用されてい
る。2. Description of the Related Art Conventionally, in a copying machine or the like using an electrophotographic process, it is necessary to fix an unfixed toner image formed on a paper to make it a permanent image. A fixing method and a heat fixing method are known. However, the above-mentioned solvent fixing method has a drawback that the solvent vapor is scattered, and there are many problems such as odor and hygiene.On the other hand, the pressure fixing method has poor fixing property as compared with other fixing methods, and the pressure The adaptive toner has a drawback that it is expensive, and at the present time, it has not been widely put into practical use. Therefore, for fixing an unfixed toner image, a heat fixing method in which the toner is melted by heating and adhered onto the paper is widely adopted.
【０００３】そして、この定着装置としては、図２に示
すように、円筒状芯金ａの内部にヒータｂを配設し、か
つ、その芯金ａ表面にポリテトラフルオロエチレン等の
耐熱性樹脂、あるいは、ＨＴＶシリコーンゴム（High T
emperature Vulcanization Silicone Rubber），ＲＴＶ
シリコーンゴム（Room Temperature Vulcanization Sil
icone）等の耐熱弾性体から成る被覆層ｃを形成した加
熱定着ロールｄと、この加熱定着ロールｄの下方に設け
られ、円筒状芯金ｅの表面にＨＴＶシリコーンゴム、Ｌ
ＴＶシリコーンゴム（Low Temperature Valcanization
Silicone Rubber）、ＲＴＶシリコーンゴム、フッ素ゴ
ム、ＥＰＤＭゴム（Ethylene PropyleneDiene Methacry
l Rubber）等の耐熱弾性層ｆを形成した加圧ロールｇと
から構成され、これらロールｄ，ｇ間に未定着トナー像
の形成された用紙ｈを挿通させて定着を行うヒートロー
ル方式の装置が知られており、これは他の加熱定着方式
であるフラッシュ定着方式、あるいは、オーブン定着方
式の装置と較べ、その定着性能、定着速度、安全性及び
経済性等において優れているため最も広く利用されてい
る。In this fixing device, as shown in FIG. 2, a heater b is provided inside a cylindrical core metal a, and a heat-resistant resin such as polytetrafluoroethylene is provided on the surface of the core metal a. , Or HTV silicone rubber (High T
emperature Vulcanization Silicone Rubber), RTV
Silicone rubber (Room Temperature Vulcanization Sil
icone) and the like, and a heat fixing roll d on which a coating layer c made of a heat-resistant elastic material is formed, and a HTV silicone rubber, L
TV Silicone Rubber (Low Temperature Valcanization
Silicone Rubber), RTV Silicone Rubber, Fluorine Rubber, EPDM Rubber (Ethylene PropyleneDiene Methacry)
(a rubber) and a pressure roll g having a heat-resistant elastic layer f formed thereon, and a heat roll type device for fixing by inserting a sheet h having an unfixed toner image formed between the rolls d and g. This is the most widely used because it is superior in fixing performance, fixing speed, safety, and economical efficiency compared to other heat fixing methods such as flash fixing method or oven fixing method. Has been done.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、上記加
熱定着ロールｄの被覆層ｃとして、耐熱性樹脂を使用す
る従来の定着装置においては、この装置によって定着さ
れたトナー画像が光沢を発し、その反射光によって定着
画像が読み難くなるという技術的課題があった。すなわ
ち、ポリテトラフルオロエチレン等の耐熱性樹脂の被覆
された加熱定着ロールｄは、通常上記樹脂を加熱溶融さ
せた状態で上記芯金ａ上に塗布し、かつ、その塗布面を
バフ研磨処理等して製造されており、上記被覆層ｃ表面
が平滑で且つ弾性を有していないため、加熱定着時に、
用紙ｈ上の未定着トナー像が上記加熱定着ロールｄに押
潰されてその表面が平滑になってしまい、その結果光沢
を発するようになるからである。However, in the conventional fixing device using a heat-resistant resin as the coating layer c of the heating fixing roll d, the toner image fixed by this device gives gloss and its reflection. There is a technical problem that the fixed image becomes difficult to read due to light. That is, the heat fixing roll d coated with a heat resistant resin such as polytetrafluoroethylene is usually applied onto the core metal a in a state where the above resin is heated and melted, and the applied surface is subjected to buffing treatment or the like. The surface of the coating layer c is smooth and has no elasticity.
This is because the unfixed toner image on the sheet of paper h is crushed by the heating and fixing roll d and its surface becomes smooth, and as a result, it becomes glossy.
【０００５】これに対し、加熱定着ロールｄの被覆層ｃ
としてＨＴＶシリコーンゴム等の耐熱弾性体を使用する
従来の定着装置においては、上記被覆層ｃの表面に微細
な凹凸が多数存在し、かつ、弾性を有しており、加熱定
着時に用紙上ｈ上の未定着トナー像が押潰されるという
上記技術的課題は生じないが、その反面、上記耐熱弾性
体は、上記耐熱性樹脂と較べて耐摩耗性がなく、用紙ｈ
や加熱定着ロールｄの周囲に配設された用紙剥離爪ｉあ
るいは温度センサｊ等との接触により摩滅し易いため、
短期間の使用でもって定着不良を起こしてしまうという
技術的課題が生ずる。On the other hand, the coating layer c of the heat fixing roll d
In a conventional fixing device using a heat-resistant elastic body such as HTV silicone rubber, there are many fine irregularities on the surface of the coating layer c and they have elasticity, and they are on the paper h during heat fixing. Although the above-mentioned technical problem that the unfixed toner image is crushed does not occur, on the other hand, the heat-resistant elastic body has less abrasion resistance than the heat-resistant resin, and the paper h
And the paper peeling claws i arranged around the heat fixing roll d, the temperature sensor j, etc., are easily worn away,
There is a technical problem that fixing failure occurs even when used for a short period of time.
【０００６】しかも、上記耐熱弾性体は、加熱定着ロー
ルｄ表面に塗布するトナーオフセット防止用の離型剤に
より膨潤し易い性質を有しているため、この離型剤を使
用した場合、上記被覆層ｃが短期間の使用でもって変形
し、用紙ｈにしわを発生させてしまう技術的課題が起こ
り、一方、離型剤を使用しない場合には、用紙ｈ上のト
ナーの一部が上記被覆層ｃの凹凸内に付着して加熱定着
ロールｄからの用紙ｈの剥離性を劣化させてしまった
り、あるいは、上記トナーオフセットを起こす等の弊害
があり、その保守管理が上記被覆層ｃとして耐熱性樹脂
を使用する定着装置と較べて面倒になるという技術的課
題があった。In addition, since the heat-resistant elastic body has a property that it is easily swollen by the release agent for preventing toner offset applied to the surface of the heat fixing roll d, when the release agent is used, the above coating is performed. There is a technical problem that the layer c is deformed due to short-term use and wrinkles are generated on the sheet h. On the other hand, when the release agent is not used, a part of the toner on the sheet h is covered with the above-mentioned material. It adheres to the unevenness of the layer c and deteriorates the releasability of the sheet h from the heat fixing roll d, or causes the toner offset described above. There is a technical problem that it is more troublesome than a fixing device using a resin.
【０００７】この発明は、以上の技術的課題を解決する
ためになされたものであって、耐熱性樹脂の被覆された
加熱定着ロールを備えた定着装置を前提とし、定着後の
トナー画像が光沢を発することなく、しかも、長期に亘
って前記定着状態を維持することができる定着装置にお
ける加熱定着ロールの製造方法を提供することにある。The present invention has been made to solve the above technical problems, and is premised on a fixing device provided with a heat fixing roll coated with a heat resistant resin, and a toner image after fixing has a glossy surface. It is an object of the present invention to provide a method for manufacturing a heat fixing roll in a fixing device, which can maintain the fixing state for a long period of time without generating the above.
【０００８】[0008]
【課題を解決するための手段】すなわち、この発明は、
互いに圧接しながら回転する加熱定着ロールと加圧ロー
ルとを備え、未定着トナー像が形成されたシートをこれ
等ロール間に挿通させて未定着トナー像の定着を行う定
着装置を前提とし、上記加熱定着ロールを製造するに際
し、円筒状芯金の外周面をフッ素系熱収縮チューブで被
覆する工程と、この工程が終了した後に前記円筒状芯金
の外周面に被覆されたフッ素系熱収縮チューブの表面を
十点平均粗さで２μｍＲｚ〜３０μｍＲｚの範囲内にブ
ラスト処理する工程とを備えたことを特徴とするもので
ある。That is, the present invention is
On the premise of a fixing device that includes a heating fixing roll and a pressure roll that rotate while being pressed against each other, and a sheet on which an unfixed toner image is formed is inserted between these rolls to fix the unfixed toner image, When manufacturing a heat fixing roll, a step of coating the outer peripheral surface of the cylindrical core metal with a fluorine-based heat-shrinkable tube, and a fluorine-based heat shrinkable tube coated on the outer peripheral surface of the cylindrical metal core after this step is completed. And a step of blasting the surface of 10 to 10 μm Rz in the range of 2 μm Rz to 30 μm Rz.
【０００９】[0009]
【作用】上述したような技術的手段によれば、先ず、フ
ッ素系熱収縮チューブ被覆工程が行われ、フッ素系熱収
縮チューブが円筒状芯金の外周面に熱収縮にて被覆され
る。この後、ブラスト処理工程が行われ、上記円筒状芯
金の外周面に被覆されたフッ素系熱収縮チューブの表面
が十点平均粗さで２μｍＲｚ〜３０μｍＲｚの範囲内に
粗面化されるが、これと同時に、ブラスト粒子の押圧力
により、上記フッ素系熱収縮チューブの円筒状芯金への
接着力が増大し、円筒状芯金に対するフッ素系熱収縮チ
ューブの固定状態が確実なものになる。According to the technical means as described above, first, the fluorine-based heat-shrinkable tube coating step is performed, and the fluorine-based heat-shrinkable tube is coated on the outer peripheral surface of the cylindrical core by heat shrinkage. Thereafter, a blasting process is performed, and the surface of the fluorine-based heat-shrinkable tube coated on the outer peripheral surface of the cylindrical core metal is roughened to have a ten-point average roughness of 2 μmRz to 30 μmRz. At the same time, the pressing force of the blast particles increases the adhesive force of the fluorine-based heat-shrinkable tube to the cylindrical cored bar, and the fixed state of the fluorine-based heat-shrinkable tube to the cylindrical cored bar becomes reliable.
【００１０】[0010]
【実施例】以下、添付図面に示す実施例に基づいてこの
発明を詳細に説明する。図１に示す実施例において、定
着装置は、加熱定着ロール１と加圧ロール２とから構成
されるものである。上記加熱定着ロール１は、図１に示
すように、矢印Ａ方向に回転可能に軸受された円筒状の
芯金３と、この芯金３表面を接着剤４を介して被覆する
ＰＦＡ（四弗化エチレン−パーフルオロアルキルビニル
エーエル共重合体）のフッ素系熱収縮チューブ５とから
成り、上記芯金３内にはヒータ６が配設されている。こ
の実施例において、上記加熱定着ロール１は、芯金３の
表面をフッ素系熱収縮チューブ５で被覆した後に、当該
フッ素系熱収縮チューブ５の表面にアランダムによるブ
ラスト処理を行い、十点平均粗さで２μｍＲｚの粗面を
形成したものになっている。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail based on the embodiments shown in the accompanying drawings. In the embodiment shown in FIG. 1, the fixing device comprises a heat fixing roll 1 and a pressure roll 2. As shown in FIG. 1, the heat fixing roll 1 includes a cylindrical core metal 3 rotatably supported in the direction of arrow A, and a PFA (tetrafluorocarbon) coating the surface of the core metal 3 with an adhesive 4. A heat-shrinkable tube 5 of a fluorine-based ethylene-perfluoroalkyl vinyl ether copolymer), and a heater 6 is disposed in the core metal 3. In this embodiment, in the heat fixing roll 1, the surface of the cored bar 3 is covered with the fluorine-based heat-shrinkable tube 5, and the surface of the fluorine-based heat-shrinkable tube 5 is blasted by an alundum to obtain a ten-point average. It has a roughness of 2 μm Rz.
【００１１】一方、加圧ロール２は、上記加熱定着ロー
ル１の下方位置に設けられ、加熱定着ロール１と同様円
筒状の芯金７と、この芯金７表面を被覆するＨＴＶシリ
コーンゴム等の耐熱弾性体層とから成り、上記加熱定着
ロール１の回転に伴って矢印Ｂ方向に回動可能に軸受さ
れていると共に、加熱定着ロール１と加圧ロール２間に
は、図示されていない加圧機構によって適当な圧力が付
与されている。On the other hand, the pressure roll 2 is provided below the heat fixing roll 1 and is composed of a cylindrical core metal 7 similar to the heat fixing roll 1 and HTV silicone rubber or the like covering the surface of the core metal 7. It is composed of a heat-resistant elastic layer and is rotatably supported in the direction of arrow B in accordance with the rotation of the heat-fixing roll 1, and between the heat-fixing roll 1 and the pressure roll 2 is not shown. Appropriate pressure is applied by the pressure mechanism.
【００１２】尚、図１中、９，１０は上記加熱定着ロー
ル１に設けられた用紙剥離爪と、このロール１表面の温
度を検知する温度センサを夫々示しており、また、１１
は未定着トナー像の形成された用紙を示し、１２はこの
用紙１１を上記ロール１，２間に挿通させるためのペー
パガイドを夫々示している。In FIG. 1, reference numerals 9 and 10 respectively denote a paper stripping claw provided on the heat fixing roll 1 and a temperature sensor for detecting the temperature of the surface of the roll 1, and 11 also.
Indicates a sheet on which an unfixed toner image is formed, and 12 indicates a paper guide for inserting the sheet 11 between the rolls 1 and 2.
【００１３】次に、本発明が適用された定着装置を使用
してトナー定着を行うには、図１に示すように、未定着
トナー像を有する用紙１１を搬送して加熱定着ロール１
及び加圧ロール２間を挿通させ、それによって、トナー
を溶融させて用紙１１の繊維内に流し込み、冷却させて
定着するものである。このとき、用紙１１上の未定着ト
ナー像が上記加熱定着ロール１に押潰されても、その表
面が粗面化された状態で定着されるため、定着画像は光
沢を発することはない。また、上記フッ素系熱収縮チュ
ーブ５は、それ自体硬質であり、しかも、ピンホールや
クラック等の欠陥のない成形品に対して粗面化を施して
いる分、局所的な破壊等が生成されている懸念もないた
め、上記フッ素系熱収縮チューブ５に多数回用紙１１が
接触したとしても、そのフッ素系熱収縮チューブ５表面
の粗面状態が変化せず、上記良好な定着状態は長期に亘
って維持される。Next, in order to perform toner fixing using the fixing device to which the present invention is applied, as shown in FIG. 1, the paper 11 having an unfixed toner image is conveyed and the heat fixing roll 1 is carried out.
The pressure roller 2 is inserted between the pressure roller 2 and the pressure roller 2, whereby the toner is melted and poured into the fibers of the paper 11, cooled, and fixed. At this time, even if the unfixed toner image on the sheet 11 is crushed by the heating and fixing roll 1, since the surface is fixed in a roughened state, the fixed image does not exhibit gloss. Further, the fluorine-based heat-shrinkable tube 5 itself is hard, and since the roughening is applied to the molded product having no defects such as pinholes and cracks, local breakage is generated. Therefore, even if the paper 11 is brought into contact with the fluorine-based heat-shrinkable tube 5 many times, the rough surface state of the surface of the fluorine-based heat-shrinkable tube 5 does not change, and the good fixing state is long-term. Maintained throughout.
【００１４】ここで、本発明によって製造された加熱定
着ロール１を使用した定着装置、従来の耐熱性樹脂で被
覆された加熱定着ロールを使用した定着装置、並びに、
耐熱弾性体の被覆された加熱定着ロールを使用した定着
装置を夫々使用して、各加熱定着ロールの表面粗さ、各
定着装置によって定着された定着画像光沢度、並びに、
各定着装置における初期の定着状態（光沢度）を維持で
きる用紙の挿通枚数、すなわち、加熱定着ロールの寿命
を比較するための比較実験を行った。この結果を以下の
表１に示す。Here, a fixing device using the heat fixing roll 1 manufactured according to the present invention, a fixing device using a conventional heat fixing roll coated with a heat resistant resin, and
Using a fixing device using a heat fixing roll coated with heat resistant elastic body, respectively, the surface roughness of each heat fixing roll, the glossiness of the fixed image fixed by each fixing device, and
A comparative experiment was conducted to compare the number of sheets of paper through which each fixing device can maintain the initial fixing state (glossiness), that is, the life of the heating fixing roll. The results are shown in Table 1 below.
【００１５】[0015]
【表１】 [Table 1]
【００１６】尚、上記比較実験において、本発明の定着
装置（）における加熱定着ロールは、アランダムの
メッシュ、吹付け圧、吹付け時間等のブラスト処理条件
を変えて得たものであり、具体的なブラスト処理条件例
を以下の表２に示す。In the above comparative experiment, the heat-fixing roll in the fixing device () of the present invention was obtained by changing the blasting conditions such as mesh of alundum, spraying pressure and spraying time. Table 2 below shows examples of typical blasting processing conditions.
【００１７】[0017]
【表２】 [Table 2]
【００１８】また、従来の耐熱性樹脂を使用した定着装
置における加熱定着ロールは、芯金表面に、加熱溶融さ
れたＰＦＡ樹脂を塗布し、その表面を十点平均粗さで
１．５μｍＲｚにブラスト処理（例えば表２のブラスト
処理条件の吹付け圧力を０．８Ｋｇ／ｃｍ2に変更）し
て得たものであり、一方、従来の耐熱弾性体を使用した
定着装置における加熱定着ロールは、芯金表面にＲＴＶ
シリコーンゴムを被覆して得たものである。Further, in the heat fixing roll in the fixing device using the conventional heat-resistant resin, the core metal surface is coated with the heat-melted PFA resin, and the surface is blasted to have a ten-point average roughness of 1.5 μmRz. The heat-fixing roll in the fixing device using the conventional heat-resistant elastic body has a core metal bar. RTV on the surface
It is obtained by coating with silicone rubber.
【００１９】また更に、定着画像の光沢度は、光の反射
率にて評価し、加熱定着ロールの寿命は、初期の定着状
態を維持できなくなったときの用紙の総挿通枚数で評価
した。Furthermore, the glossiness of the fixed image was evaluated by the light reflectance, and the life of the heating and fixing roll was evaluated by the total number of sheets of paper inserted when the initial fixing state could not be maintained.
【００２０】以上の結果から、本発明の定着装置におけ
る加熱定着ロールの表面平均粗さは、十点平均粗さで２
μｍＲｚ以上の場合に、定着画像の反射率が１５％以下
となり、画像判読に支障のないことが判明した。また、
表面粗さが３０μｍＲｚを越えると、加熱定着ロール表
面の凹凸部にトナーが入り込み、トナー離型性が劣化す
るため好ましくないことも判明した。更に、本発明の定
着装置においては、用紙を１０万枚以上挿通させても、
初期の定着状態が変わらず、加熱定着ロールの寿命が著
しく長いことも判明した。From the above results, the surface average roughness of the heat fixing roll in the fixing device of the present invention is 2 in terms of ten-point average roughness.
It was found that in the case of μmRz or more, the reflectance of the fixed image was 15% or less, and there was no problem in reading the image. Also,
It was also found that when the surface roughness exceeds 30 μmRz, the toner enters the irregularities on the surface of the heat fixing roll, and the toner releasability deteriorates, which is not preferable. Further, in the fixing device of the present invention, even if 100,000 sheets or more of paper are inserted,
It was also found that the initial fixing state did not change and the life of the heat fixing roll was extremely long.
【００２１】一方、耐熱性樹脂を使用する従来の定着装
置においては、ロール表面の粗面状態が用紙を１０００
枚程度挿通しただけで変化してしまい、初期の定着状態
を長期に亘って維持できないことが判明した。同様に、
耐熱弾性体を使用する従来の定着装置においても、用紙
を２万〜７万枚挿通すると、耐熱弾性体が摩滅したり、
芯金から剥離する等して初期の定着状態を維持すること
が困難であることが判明した。On the other hand, in the conventional fixing device using a heat resistant resin, the rough surface state of the roll is 1000
It was found that the initial fixing state could not be maintained for a long period of time because it changed only by inserting about one sheet. Similarly,
Even in the conventional fixing device using the heat resistant elastic body, when the 20,000 to 70,000 sheets of paper are inserted, the heat resistant elastic body is worn out,
It was found that it is difficult to maintain the initial fixing state by peeling off the core metal.
【００２２】[0022]
【発明の効果】以上説明してきたように、この発明によ
れば、加熱定着ロール表面をフッ素系熱収縮チューブで
被覆した後に、このフッ素系熱収縮チューブ表面を２μ
ｍＲｚ〜３０μｍＲｚの範囲内でブラスト処理するよう
にしたので、ブラスト粒子の押圧力により、上記フッ素
系熱収縮チューブの円筒状芯金への接着力を増大させ、
円筒状芯金に対するフッ素系熱収縮チューブの固定状態
を確実なものにすることが可能になる。このため、円筒
状芯金からのフッ素系熱収縮チューブの剥がれ現象を有
効に防止でき、その分、加熱定着ロールの寿命信頼性を
向上させることができる。As described above, according to the present invention, after the surface of the heat fixing roll is coated with the fluorine-based heat-shrinkable tube, the surface of the fluorine-based heat-shrinkable tube is 2 μm.
Since the blast treatment is performed within the range of mRz to 30 μmRz, the adhesive force of the fluorinated heat-shrinkable tube to the cylindrical core metal is increased by the pressing force of the blast particles,
It is possible to secure the fixed state of the fluorine-based heat-shrinkable tube with respect to the cylindrical core metal. Therefore, it is possible to effectively prevent the fluorine-based heat-shrinkable tube from peeling off from the cylindrical core metal, and to improve the life reliability of the heat fixing roll by that amount.
【００２３】更に、この発明により製造された加熱定着
ロールを使用した定着装置によれば、第一に、定着画像
の光沢発生を有効に防止することにより定着画像の判読
に支障をきたす事態を確実に回避することができ、しか
も、トナー離型性を良好に保つことにより定着装置本来
の性能を維持することができる。すなわち、加熱定着時
にシート上の未定着トナー像が加熱定着ロールに押し潰
されても、シート上のトナー像はその表面が加熱定着ロ
ール表面の粗面状態に応じて粗面化された状態で定着さ
れるため、定着画像の表面が平滑であるものに較べて定
着画像の反射率を充分に抑えることが可能になり、その
分、定着画像が不必要に光沢を発することはなく、定着
画像の判読に支障をきたす事態を確実に回避することが
できる。しかも、加熱定着ロール表面の粗面化に基づく
凹凸部にトナーが不必要に付着する事態を確実に回避
し、加熱定着ロールのトナー離型性を良好に保つように
したので、シートの剥離性の劣化やトナーオフセット現
象を有効に防止することができる。Further, according to the fixing device using the heat fixing roll manufactured according to the present invention, firstly, the occurrence of gloss of the fixed image is effectively prevented, so that it is possible to surely prevent the fixed image from being read. It is possible to avoid the above, and further, by maintaining the toner releasability excellent, the original performance of the fixing device can be maintained. That is, even when the unfixed toner image on the sheet is crushed by the heat fixing roll during heat fixing, the surface of the toner image on the sheet is roughened according to the rough surface state of the heat fixing roll. Since the image is fixed, the reflectance of the fixed image can be sufficiently suppressed as compared with the case where the surface of the fixed image is smooth, and accordingly, the fixed image does not unnecessarily generate gloss and the fixed image It is possible to surely avoid the situation that interferes with the interpretation of. Moreover, it is possible to surely avoid the situation where toner unnecessarily adheres to the uneven portion due to the roughening of the surface of the heat fixing roll, and to keep the toner releasability of the heat fixing roll good, so that the sheet releasability is improved. Deterioration and toner offset phenomenon can be effectively prevented.
【００２４】第二に、加熱定着ロール表面の粗面状態を
長期に亘って維持することができ、加熱定着ロールの寿
命を著しく延ばすことができる。すなわち、加熱定着ロ
ール表面を被覆するフッ素系熱収縮チューブは、それ自
体が硬質で、かつ、ピンホールやクラック等の欠陥が少
ない成形品であるため、このフッ素系熱収縮チューブの
表面を粗面化した場合、フッ素系熱収縮チューブ表面に
局所的破壊等が引き起こされることは少ない。このた
め、シートや剥離爪等が加熱定着ロール表面に多数回接
触したとしても、加熱定着ロール表面のフッ素系熱収縮
チューブ自体の硬質性及び欠陥の少ない粗面状態からす
れば、加熱定着ロールの表面の粗面状態が摩耗によって
変化し難く、加熱定着ロール表面の粗面状態を長期に亘
って維持することができる。Secondly, the surface roughness of the heat fixing roll can be maintained for a long time, and the life of the heat fixing roll can be remarkably extended. That is, since the fluorine-based heat-shrinkable tube that covers the surface of the heat-fixing roll is a molded product that is hard in itself and has few defects such as pinholes and cracks, the surface of this fluorine-based heat-shrinkable tube is roughened. When it is turned into a small amount, the surface of the fluorine-based heat-shrinkable tube is unlikely to be locally damaged. Therefore, even if a sheet, a peeling claw, or the like comes into contact with the surface of the heat-fixing roll many times, in view of the hardness of the heat-fixing roll surface itself and the rough surface state with few defects, the heat-fixing roll has The rough surface state is unlikely to change due to wear, and the rough surface state of the heat fixing roll can be maintained for a long period of time.
【００２５】従って、この発明によれば、定着性能及び
寿命の点で優れている加熱定着ロールを製造でき、もっ
て、光沢が発しない良好な定着画像を長期に亘って得る
ことが可能になり、定着装置の保守管理を容易にするこ
とができる。Therefore, according to the present invention, it is possible to manufacture a heat-fixing roll which is excellent in fixing performance and life, and it is possible to obtain a good fixed image without gloss for a long period of time. The maintenance management of the fixing device can be facilitated.
【図１】 この発明によって製造された加熱定着ロール
を使用した定着装置の一実施例を示す説明図である。FIG. 1 is an explanatory diagram showing an embodiment of a fixing device using a heating fixing roll manufactured according to the present invention.
【図２】 従来の定着装置の一例を示す説明図である。FIG. 2 is an explanatory diagram showing an example of a conventional fixing device.
１…加熱定着ロール，２…加圧ロール，３，７…芯金，
４…接着剤，５…フッ素系熱収縮チューブ，６…ヒー
タ，８…耐熱弾性体，９…用紙剥離爪，１０…温度セン
サ，１１…用紙，１２…ペーパガイド1 ... Heat fixing roll, 2 ... Pressure roll, 3, 7 ... Core bar,
4 ... Adhesive, 5 ... Fluorine-based heat shrinkable tube, 6 ... Heater, 8 ... Heat resistant elastic body, 9 ... Paper peeling claw, 10 ... Temperature sensor, 11 ... Paper, 12 ... Paper guide
Claims (1)
ールと加圧ロールとを備え、未定着トナー像が形成され
たシートをこれ等ロール間に挿通させて未定着トナー像
の定着を行う定着装置において、上記加熱定着ロールを
製造するに際し、円筒状芯金の外周面をフッ素系熱収縮
チューブで被覆する工程と、この工程が終了した後に前
記円筒状芯金の外周面に被覆されたフッ素系熱収縮チュ
ーブの表面を十点平均粗さで２μｍＲｚ〜３０μｍＲｚ
の範囲内にブラスト処理する工程とを備えたことを特徴
とする定着装置における加熱定着ロールの製造方法。1. A fixing device comprising a heating fixing roll and a pressure roll which rotate while being in pressure contact with each other, and a sheet on which an unfixed toner image is formed is inserted between these rolls to fix the unfixed toner image. In the step of manufacturing the heat fixing roll, a step of coating the outer peripheral surface of the cylindrical cored bar with a fluorine-based heat-shrinkable tube, and a fluorine-based layer coated on the outer peripheral surface of the cylindrical cored bar after this step is completed. The surface of the heat shrinkable tube has a ten-point average roughness of 2 μmRz to 30 μmRz.
And a step of performing a blasting treatment within the range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4590792A JPH0690579B2 (en) | 1992-02-01 | 1992-02-01 | Method for manufacturing heat fixing roll in fixing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4590792A JPH0690579B2 (en) | 1992-02-01 | 1992-02-01 | Method for manufacturing heat fixing roll in fixing device |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15324884A Division JPS6132081A (en) | 1984-07-25 | 1984-07-25 | Fixing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0572935A true JPH0572935A (en) | 1993-03-26 |
| JPH0690579B2 JPH0690579B2 (en) | 1994-11-14 |
Family
ID=12732320
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4590792A Expired - Lifetime JPH0690579B2 (en) | 1992-02-01 | 1992-02-01 | Method for manufacturing heat fixing roll in fixing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0690579B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5860051A (en) * | 1995-05-22 | 1999-01-12 | Canon Kabushiki Kaisha | Belt-type fixing apparatus with pressure roller |
| JP2022021106A (en) * | 2020-07-21 | 2022-02-02 | コニカミノルタ株式会社 | Fixing member and method for manufacturing the same, fixing device, image forming apparatus, and image forming method |
-
1992
- 1992-02-01 JP JP4590792A patent/JPH0690579B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5860051A (en) * | 1995-05-22 | 1999-01-12 | Canon Kabushiki Kaisha | Belt-type fixing apparatus with pressure roller |
| JP2022021106A (en) * | 2020-07-21 | 2022-02-02 | コニカミノルタ株式会社 | Fixing member and method for manufacturing the same, fixing device, image forming apparatus, and image forming method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0690579B2 (en) | 1994-11-14 |
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