JPH0565874B2 - - Google Patents
Info
- Publication number
- JPH0565874B2 JPH0565874B2 JP5153087A JP5153087A JPH0565874B2 JP H0565874 B2 JPH0565874 B2 JP H0565874B2 JP 5153087 A JP5153087 A JP 5153087A JP 5153087 A JP5153087 A JP 5153087A JP H0565874 B2 JPH0565874 B2 JP H0565874B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- crown
- roller
- silicone rubber
- 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.)
- Expired - Lifetime
Links
- 238000010438 heat treatment Methods 0.000 claims description 44
- 238000004073 vulcanization Methods 0.000 claims description 24
- 239000004945 silicone rubber Substances 0.000 claims description 14
- 229920002379 silicone rubber Polymers 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 238000007259 addition reaction Methods 0.000 claims description 4
- 238000000465 moulding Methods 0.000 description 13
- 230000000052 comparative effect Effects 0.000 description 9
- 238000010304 firing Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 239000000945 filler Substances 0.000 description 8
- 238000000227 grinding Methods 0.000 description 8
- 229920001971 elastomer Polymers 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 239000000806 elastomer Substances 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- 239000011247 coating layer Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229920001296 polysiloxane Polymers 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000037303 wrinkles Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920002631 room-temperature vulcanizate silicone Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/20—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat
- G03G15/2003—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat
- G03G15/2014—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat
- G03G15/2053—Structural details of heat elements, e.g. structure of roller or belt, eddy current, induction heating
- G03G15/2057—Structural details of heat elements, e.g. structure of roller or belt, eddy current, induction heating relating to the chemical composition of the heat element and layers thereof
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G2215/00—Apparatus for electrophotographic processes
- G03G2215/20—Details of the fixing device or porcess
- G03G2215/2003—Structural features of the fixing device
- G03G2215/2058—Shape of roller along rotational axis
- G03G2215/2061—Shape of roller along rotational axis concave
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G2215/00—Apparatus for electrophotographic processes
- G03G2215/20—Details of the fixing device or porcess
- G03G2215/2003—Structural features of the fixing device
- G03G2215/2058—Shape of roller along rotational axis
- G03G2215/2064—Shape of roller along rotational axis convex
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Fixing For Electrophotography (AREA)
Description
【発明の詳細な説明】
（発明の目的）
この発明は電子複写機その他電子写真装置に組
込んで使用される定着ローラーに関するもので、
特にクラウン状ローラーや逆クラウン状ローラー
のように非直筒状の定着ローラーを成型型成型に
より生産するとともに、生産品において所望の後
記する非直筒偏差量が容易に得られる手段を提供
するのがその目的である。DETAILED DESCRIPTION OF THE INVENTION (Object of the Invention) The present invention relates to a fixing roller that is incorporated into an electronic copying machine or other electrophotographic device.
In particular, it is desirable to produce fixing rollers in a non-straight cylindrical shape, such as a crown-shaped roller or an inverted crown-shaped roller, by molding, and to provide a means for easily obtaining a desired amount of non-straight cylindrical deviation, which will be described later, in the product. It is a purpose.
たとえばシリコーンゴムをエラストマー層の素
材とする電子写真機の定着ローラーは、従来心金
をRTVシリコーンゴムで被覆して加硫を進行さ
せ、加硫完了後その表面を研削整形して生産する
のが一般的であつたが、近年は他の生産法とし
て、円筒状の成型型を用い、ローラーの心金をこ
の成型型に軸挿固定したうえでシリコーンゴムを
充填し、この成型型を定温ふん囲気中で加熱する
ことにより充填物の加硫を行う方法も開発されて
いる。そして、このような成型による生産手段に
よれば整型のための研削工程が省略される利点が
ある。のみならず、成型型を用いる生産手段によ
れば、充填物として発泡性のシリコーンゴムを用
いることにより、スポンジエラストマー層のロー
ラーも簡単に得られるほか、筒壁の内周に沿つて
フツ素樹脂チユーブを装着した成型型の使用によ
り、フツ素樹脂の被覆層をそなえるエラストマー
ローラーが手軽に生産できる等、種々の利点があ
ることが知られている。 For example, fuser rollers for electrophotographic machines whose elastomer layer is made of silicone rubber have traditionally been produced by coating the core metal with RTV silicone rubber, allowing vulcanization to progress, and then grinding and shaping the surface after vulcanization is complete. However, in recent years, another production method has been introduced, in which a cylindrical mold is used, the core of the roller is inserted and fixed into the mold, and silicone rubber is then filled, and the mold is placed in a constant temperature vacuum. Methods have also been developed for vulcanizing the filling by heating in an ambient atmosphere. The production method using such molding has the advantage of omitting the grinding process for shaping. In addition, by using a production method that uses a mold, a roller with a sponge elastomer layer can be easily obtained by using foamable silicone rubber as a filler. It is known that the use of a mold equipped with a tube has various advantages, such as the ability to easily produce an elastomer roller provided with a fluororesin coating layer.
さて、電子写真装置の定着ローラーは第１図ａ
に示すように軸に沿う各部において外径の均一な
直筒状のローラーのみならず、このローラーの対
ローラーの形状に対応し、同図ｂまたｃに示すよ
うな非直筒状のローラーも要求される。同図ｂは
クラウン状ローラーとよばれ、その非直筒性はつ
ぎにクラウン量なる数値であらわすことができ
る。 Now, the fixing roller of an electrophotographic device is shown in Figure 1a.
In addition to a straight cylindrical roller with a uniform outer diameter at each part along the axis as shown in the figure, a non-straight cylindrical roller as shown in Figures b and c is also required, corresponding to the shape of the roller pair. Ru. Figure b is called a crowned roller, and its non-straight cylindrical nature can be expressed by a numerical value called crown amount.
クラウン量＝D1−D2＋D3／２
一方、同図ｃは逆クラウン状ローラーとよば
れ、その非直筒性は
逆クラウン量＝D2′＋D3′／２−D1′
であらわすことができる。 Crown amount = D 1 - D 2 + D 3 /2 On the other hand, c in the same figure is called an inverted crown-shaped roller, and its non-straight cylindrical nature can be expressed as Inverted crown amount = D 2 ′ + D 3 ′ / 2 − D 1 ′ I can do it.
加硫後のエラスマー層を研削加工する従来方法
によれば、所望の径の直筒ローラーや、所望のク
ラウン量または逆クラウン層をもつ非直筒ローラ
ーの生産が可能であることはいうまでもないが、
成型型による成型のみにより、研削加工を行わな
いでこれら所望の径の直筒ローラーや、所望のク
ラウン量または逆クラウン量をもつ非直筒ローラ
ーを得ることは極度に困難である。即ち、直筒状
の筒壁をもつ金型を用いて加硫成型を行つても直
筒状ローラーは得られず、かえつてクラウン状の
成型物が取出されるので、直筒状のものを求める
のであれば、成型後に研削加工が必要なのであ
る。この場合、かりに成型の目的物を直筒状から
クラウン状のものに変更したとしても、可能な成
型時間、温度の範囲ではクラウン量を自由に制御
することができない。また、成型法を用いる従来
技術により逆クラウン状ローラーを得ることは全
く不可能であるから、従来技術の成型手段による
場合でも、所望の定着ローラーを得るには結局の
ところ研削加工が不可欠である。 It goes without saying that by the conventional method of grinding the elastomer layer after vulcanization, it is possible to produce straight cylindrical rollers with a desired diameter and non-straight cylindrical rollers with a desired crown amount or reverse crown layer. ,
It is extremely difficult to obtain a straight cylindrical roller with a desired diameter or a non-straight cylindrical roller with a desired crown amount or reverse crown amount by only molding with a molding die and without grinding. In other words, even if vulcanization molding is performed using a mold with a straight cylindrical wall, a straight cylindrical roller will not be obtained, but instead a crown-shaped molded product will be taken out. For example, grinding is required after molding. In this case, even if the object of molding is changed from a straight cylinder shape to a crown shape, the amount of crown cannot be freely controlled within the range of possible molding time and temperature. Furthermore, since it is completely impossible to obtain an inverted crown-shaped roller by the conventional molding method, even if the conventional molding method is used, a grinding process is indispensable in order to obtain the desired fixing roller. .
ところで、直筒状の金型を使用しているのにか
かわらずクラウン状の成型物が得られることは前
記した通りである。この原因につき考察したとこ
ろ、つぎのようなものであろうと推定された。即
ち、金型内の全領域において充填物の加熱が同時
に進行し、従つて加硫による固化が同時に進行す
るものとすれば、全領域が一定の密度の固形物と
なり、脱型により全長が均等な径をもつエラスト
マーローラーが得られるはずであるが、金型の端
部付近は中央部と較べて加熱表面が広いため、加
硫は端部から進行し、その際未加硫の液状充填物
が中央部に押寄せ、その結果、全体の加硫が完了
した時点では両端部よりは中央部の方が密度の高
い加硫物が得られる。従つて、脱型して金型によ
る外圧を失つた加硫物の膨張は中央部において大
きく、そのためクラウン状を呈することになるも
のと考えられる。従つて、この際クラウン量は、
中央部と比較しての端部の加熱の制御により制御
が可能と推定された。この発明はこのような推定
を基礎としてなされたものである。 By the way, as described above, a crown-shaped molded product can be obtained regardless of the use of a straight cylindrical mold. After considering the cause of this, it was assumed that the reason was as follows. In other words, if the heating of the filling proceeds simultaneously in all areas within the mold, and therefore the solidification due to vulcanization proceeds at the same time, the entire area becomes a solid with a constant density, and the entire length becomes uniform after demolding. However, since the heating surface near the edges of the mold is wider than in the center, vulcanization proceeds from the edges, and the unvulcanized liquid filler As a result, when the entire vulcanization is completed, a vulcanized product having a higher density at the center than at both ends is obtained. Therefore, it is thought that the expansion of the vulcanizate which has been removed from the mold and has lost the external pressure caused by the mold is large in the central part, which is why it takes on a crown shape. Therefore, in this case, the crown amount is
It was estimated that control could be achieved by controlling the heating at the edges compared to the center. This invention was made based on such estimation.
（発明の構成）
第２図ないし第５図には心金１を軸挿通固定し
た円筒状の成型型が示されているが、この発明に
よれば、このような成型型に付加反応型シリコー
ンゴムを充填し、まず、この成型型の筒壁２の一
または複数の環状局所の周面を加熱し、この環状
局所に対応する部分におけるシリコーンゴムの加
硫を促進する。(Structure of the Invention) FIGS. 2 to 5 show a cylindrical mold into which a mandrel 1 is inserted and fixed. According to the present invention, addition reaction silicone is added to such a mold. Rubber is filled, and first, the circumferential surface of one or more annular localized areas of the cylindrical wall 2 of this mold is heated to promote vulcanization of the silicone rubber in the areas corresponding to these annular localized areas.
前記した環状局所については、第２図および第
４図の例では筒壁２の両端部であり、第３図およ
び第５図の例では中央部である。加熱は適当に制
御できる限り任意の手段によることができるが、
図示のように着脱可能なバンドヒーター３による
のが便利である。なお、第２図および第４図に示
すように加熱すべき環状局所を両端部に選定した
場合は、後述のようにクラウン状のローラーが得
られる一方、第３図および第５図のように環状局
所を中央部に選定した場合は逆クラウン状ローラ
ーが生産され、いずれも現在の市場で定着ローラ
ーとしての需要が大きいのであるが、所望ならば
これら両端部、中央部以外の環状局所を選定する
ことにより、クラウン状、逆クラウン状以外の非
直筒定着ローラーを得ることができる。 The above-described annular local area is located at both ends of the cylindrical wall 2 in the examples shown in FIGS. 2 and 4, and is located at the center in the examples shown in FIGS. 3 and 5. Heating can be done by any means that can be properly controlled, but
It is convenient to use a detachable band heater 3 as shown in the figure. In addition, if the annular localities to be heated are selected at both ends as shown in FIGS. 2 and 4, a crown-shaped roller can be obtained as described later, while a crown-shaped roller can be obtained as shown in FIGS. 3 and 5. If an annular local area is selected at the center, an inverted crown-shaped roller is produced, and both of these rollers are in high demand as fixing rollers in the current market, but if desired, an annular local area other than those at both ends or the central area can be selected. By doing so, it is possible to obtain a non-straight cylindrical fixing roller having a shape other than a crown shape or an inverted crown shape.
この発明によれば、つぎに前記した成型型の金
体を定温焼成炉等の定温ふん囲気中で加熱するこ
とにより、充填されているシリコーンゴム全量の
加硫を完了し、かくして加硫の完了した成型物を
成型型から取出すのである。 According to this invention, by heating the metal body of the mold described above in a constant temperature atmosphere such as a constant temperature firing furnace, vulcanization of the entire amount of silicone rubber filled is completed, thus completing the vulcanization. The molded product is removed from the mold.
前記したように、シリコーンゴムが充填されて
いる直筒状の成型型を定温ふん囲気のみによつて
加熱した場合成型物がクラウン状を呈するのは、
充填物全量への与熱の不均衡に基く加硫の不均等
性がその原因であると考察されたので、この発明
者らはこのような与熱の付均衡性を積極的に利用
した。 As mentioned above, when a straight cylindrical mold filled with silicone rubber is heated only with constant temperature air, the molded product takes on a crown shape because
Since it was considered that the cause of the problem was unevenness in vulcanization due to imbalance in the amount of heat applied to the entire amount of the filler, the inventors actively utilized this balanced property of heat applied.
即ち、第２図のように、バンドヒーター３など
によつてまず筒壁２の両端部を局所加熱すること
により充填物のこの加熱局所に対応する部分の加
硫を促進してから定温ふん囲気中での加熱を行
い、充填物の加硫を完了させれば、前記と同様ク
ラウン状の成型物が得られるのである。そしてこ
の場合は、端部だけの局所加熱の加熱時間、温度
等の処理条件の選定如何によりクラウン量の制御
が容易に行われることが判明した。 That is, as shown in FIG. 2, first, both ends of the cylindrical wall 2 are locally heated using a band heater 3 or the like to promote vulcanization of the portion of the filling corresponding to the heated local area, and then the vulcanization is carried out in a constant-temperature atmosphere. By heating the filling inside and completing vulcanization of the filling, a crown-shaped molded product can be obtained in the same manner as above. In this case, it has been found that the amount of crown can be easily controlled by selecting processing conditions such as heating time and temperature for local heating of only the end portion.
一方、第３図のように筒壁２の中央部を局所加
熱した後、定温ふん囲気中で成型型全体を加熱し
た場合はクラウン状と対照的に逆クラウン状の成
型物が得られ、その際、局所加熱の条件の選定如
何により逆クラウン量の制御を自由に行うことが
できるのである。 On the other hand, when the center of the cylinder wall 2 is locally heated as shown in Fig. 3, and then the entire mold is heated in a constant temperature atmosphere, a molded product with an inverted crown shape is obtained, in contrast to the crown shape. At this time, the amount of reverse crowning can be freely controlled by selecting the local heating conditions.
この発明によれば、加熱すべき環状局所は筒壁
２の端部または中央部に限らず、任意の個所を選
定することができ、その際の成型物の非直筒偏差
量、即ち最大径部の平均直径と最小径部の平均値
径との偏差量の制御は前記した局所加熱の条件の
選定により容易に達成できるのはいうまでもな
い。 According to this invention, the annular local area to be heated is not limited to the end or the center of the cylindrical wall 2, but any arbitrary location can be selected. Needless to say, the amount of deviation between the average diameter of the diameter and the average diameter of the minimum diameter portion can be easily controlled by selecting the local heating conditions described above.
この発明の実施例において、筒壁２の内周面を
滑らかな研磨面とし、充填物をその研磨面に直接
接触させて充填すれば加硫成型により、目的とす
るローラーの非直筒形状の如何を問わず、爾後の
研削工程を要しない滑らかなローラー面をもつも
のが生産される。 In the embodiment of the present invention, if the inner circumferential surface of the cylinder wall 2 is made into a smooth polished surface and the filler is filled in direct contact with the polished surface, the desired non-linear cylindrical shape of the roller can be formed by vulcanization molding. Regardless of the type of roller, a product with a smooth roller surface that does not require a subsequent grinding process is produced.
また、この発明を実施するとき、第４図または
第５図に示すように、筒壁２の内周面に沿う径を
もつフツ素樹脂チユーブ４を成型型に挿入固定
し、不可反応型シリコーンゴムをこのフツ素樹脂
チユーブ４内に充填したうえで前記したように環
状局所の局所加熱を行ない、ついで成型型全体を
定温ふん囲気内で加熱する二段階の加熱を行うこ
とにより、フツ素樹脂被覆層をもつ定着ローラー
が得られる。そして、この生産物はフツ素樹脂チ
ユーブを使用しないで前記した加硫成型を行つた
ときと同様の非直筒状を呈している。もちろん、
前記した環状局所の位置の選定によりクラウン状
にも逆クラウン状にも成型できる。 Further, when carrying out the present invention, as shown in FIG. 4 or 5, a fluororesin tube 4 having a diameter along the inner peripheral surface of the cylindrical wall 2 is inserted and fixed into a mold, and a non-reactive silicone tube 4 is inserted and fixed into the mold. After filling rubber into the fluororesin tube 4, the fluororesin is A fusing roller with a coating layer is obtained. This product has a non-straight cylindrical shape similar to that obtained when the above-mentioned vulcanization molding is performed without using the fluororesin tube. of course,
By selecting the position of the annular local region described above, it can be formed into a crown shape or an inverted crown shape.
以下、クラウン状ローラーの生産を目的とする
実施例を掲げる。クラウン状ローラーは一般に対
ローラーとの圧接力が高く、ローラーの面長を大
きく設定する場合、ローラーが撓んで中央部のニ
ツプ幅が両端部と較べて小さくなるのを補正する
ために要求されることが多い。ただし、これらの
実施例の金型、心金、局所加熱手段、および充填
物はつぎの通りである。第２図を参照されたい。 Examples for producing crown-shaped rollers are listed below. Crown-shaped rollers generally have a high pressure contact force with the opposing rollers, and when the surface length of the roller is set to be large, this is required to compensate for the nip width at the center becoming smaller than at both ends due to deflection of the roller. There are many things. However, the molds, mandrels, local heating means, and fillings in these Examples are as follows. Please refer to Figure 2.
金型：外径＝60mm、内径＝50mm 長さ＝550mm
心金：直径＝40mm、長さ＝500mm
局所加熱手段：バンドヒーター（符号３）
200V、250W、１個の帯幅＝50mm
ヒーター相互の間隔＝15mm
充填物：付加反応型シリコーンゴム（信越化学(株)
製 X34−061）
実施例 １
第２図参照。注入孔５を通じ充填物を金型に注
入して満たした後バンドヒーター３に通電し、バ
ンドヒーター３の近くにおける筒壁２の表面温度
を150℃で４分間保持して局所加熱を行う。つい
でふん囲気温度150℃に保つた焼成炉にバンドヒ
ーター３を除去した金型を挿入し15分間保持して
炉から取出して放冷、脱型する。Mold: Outer diameter = 60mm, Inner diameter = 50mm, Length = 550mm Core metal: Diameter = 40mm, Length = 500mm Local heating means: Band heater (code 3) 200V, 250W, width of one band = 50mm Spacing = 15mm Filler: Addition reaction silicone rubber (Shin-Etsu Chemical Co., Ltd.)
(manufactured by X34-061) Example 1 See Figure 2. After filling the mold by injecting the filler through the injection hole 5, the band heater 3 is energized and the surface temperature of the cylinder wall 2 near the band heater 3 is maintained at 150° C. for 4 minutes to perform local heating. Then, the mold with the band heater 3 removed was inserted into a firing furnace kept at an ambient temperature of 150°C, held for 15 minutes, and then taken out from the furnace, allowed to cool, and demolded.
実施例 ２
局所加熱の保持時間を１分としたことを除き実
施例１と同様である。Example 2 Same as Example 1 except that the holding time of local heating was 1 minute.
実施例 ３
局所加熱の保持時間を６分としたことを除き実
施例１と同様である。Example 3 Same as Example 1 except that the holding time of local heating was 6 minutes.
実施例 ４
第４図参照。金型内に外型49mm、長さ520mm、
厚さ50μｍのPFAチユーブ４（グンゼ(株)製）を挿
入し、チユーブ末端を図示のように筒壁２と端板
とではさんで固定し、注入孔５から充填物を金型
に注入して満たして局所加熱を行ない、ついで焼
成炉中で加熱を行う。これらの局所加熱および炉
中加熱の処理方法、条件は実施例１と同様であ
る。Example 4 See Figure 4. Outer mold 49mm inside the mold, length 520mm,
Insert a PFA tube 4 (manufactured by Gunze Co., Ltd.) with a thickness of 50 μm, fix the end of the tube between the cylinder wall 2 and the end plate as shown, and inject the filling material into the mold through the injection hole 5. It is then filled with water and subjected to local heating, and then heated in a kiln. The processing methods and conditions for local heating and furnace heating are the same as in Example 1.
以下は実施例１〜３に対する対照例で、これら
の対照例における金型、心金、充填物、充填方
法、焼成炉における加熱手段、放冷、脱型につい
ては実施例１〜３と同様である。対照物１および
２については局所加熱を行わず、焼成炉中の加熱
のみを行つている。これらの対照側１および２は
特にクラウン状ローラーの生産を目的としてはい
ないが、結果として得られたローラーはいずれも
クラウン状を呈し、条件の差異にかかわらずえそ
の態様には大差がない。対照例３については、焼
成炉中の加熱は行わず、局所加熱からの電熱のみ
により充填全体の加硫を完了させているが、その
場合のクラウン量は極端に大きく、定着ローラー
としての用途には適当ではない。 The following are comparative examples for Examples 1 to 3, and the mold, mandrel, filling material, filling method, heating means in the firing furnace, cooling, and demolding in these comparative examples are the same as in Examples 1 to 3. be. For control objects 1 and 2, no local heating was performed, and only heating in the firing furnace was performed. Although these contrasting sides 1 and 2 are not specifically intended for the production of crown-shaped rollers, the resulting rollers both exhibit a crown-shape, and there is no significant difference in their appearance despite the difference in conditions. Regarding Comparative Example 3, vulcanization of the entire filling was completed only by electric heat from local heating without heating in the firing furnace, but the amount of crown in that case was extremely large, making it difficult to use as a fixing roller. is not appropriate.
対照例 １
第２図においてバンドヒーター３を取外し、局
所加熱を行わない点を除き実施例１と同様である
が、焼成炉中の加熱条件は150℃、30分である。Comparative Example 1 The same as Example 1 except that the band heater 3 was removed in FIG. 2 and no local heating was performed, but the heating conditions in the firing furnace were 150° C. and 30 minutes.
対照例 ２
焼成炉中の加熱温度が130℃であるほか対照例
１と同様である。Control Example 2 Same as Control Example 1 except that the heating temperature in the firing furnace was 130°C.
対照例 ３
焼成炉中の加熱を行わず、かつ局所個熱の時間
を30分とし、局所からの伝熱のみにより充填物全
量の加硫を完了させた。他の条件は実施例１と同
様である。Control Example 3 No heating was performed in the firing furnace, and the local individual heating time was set to 30 minutes, and vulcanization of the entire amount of the filling was completed only by local heat transfer. Other conditions are the same as in Example 1.
実施例１〜４におよび対照例１〜３により生産
されたローラーの形状の実験成績を第６図に掲げ
る。ただし、図中の長さの数値はローラーの全長
を10等分した各位置を示している。この図表から
わかるように、対照例１および２のように局所加
熱を行わず、炉中加熱のみにより充填物の加硫を
完了させた場合は、加熱条件の変更にかかわら
ず、ローラーの非直筒性に大差ないが、実施例１
〜３のように局所加熱を行つた場合はローラーの
非直筒性に著しい変化があり、従つて非直筒性の
制御が容易である。なお、実施例４のようにフツ
素樹脂チユーブを挿入して加硫を完了した場合の
成績はフツ素樹脂チユーブのない場合と大差がな
い。 The experimental results of the shapes of the rollers produced in Examples 1 to 4 and Control Examples 1 to 3 are shown in FIG. However, the length values in the figure indicate positions where the total length of the roller is divided into 10 equal parts. As can be seen from this diagram, when the filling was completed by heating only in the furnace without local heating as in Comparative Examples 1 and 2, the roller's non-straight cylinder Although there is no big difference in gender, Example 1
When local heating is performed as in steps 3 to 3, there is a significant change in the non-straight cylindrical nature of the roller, and therefore the non-straight cylindrical nature can be easily controlled. Incidentally, when the fluororesin tube is inserted and vulcanization is completed as in Example 4, the results are not much different from those without the fluororesin tube.
つぎに、逆クラウン状ローラーの生産を目的と
する実施例を掲げる。逆クラウン状ローラーは定
着ローラーによつて送り出される用紙の紙じわの
防止対策として有効であり、一般にローラーの面
長が比較的小で、対ローラー間の圧接力が小さい
中、低級の複写機に用途が多い。ただし、これら
の実施例において、金型、心金、局所加熱手段、
および充填物はつぎの通りである。なお、第３
図、第５図は参照されたい。 Next, an example aimed at producing an inverted crown-shaped roller will be presented. The inverted crown-shaped roller is effective as a measure to prevent wrinkles in the paper fed by the fixing roller, and is generally used in medium to low-grade copying machines where the surface length of the roller is relatively small and the pressure force between the rollers is small. It has many uses. However, in these examples, the mold, the core metal, the local heating means,
And the fillings are as follows. In addition, the third
Please refer to FIG.
金型：外径＝50mm、内径＝40mm 長さ＝350mm
心金：直径＝30mm、長さ＝300mm
局所加熱手段：バンドヒーター（符号３）
200V、250W、１個の帯幅＝50mm、
ヒーター相互の間隔＝15mm
充填物：付加反応型シリコーンゴム（信越化学(株)
製 X34−061）
実施例 ５
第３図参照。注入孔５を通じ充填物を金型に注
入して満たした後バンドヒータ３に通電し、バン
ドヒーター３の近くにおける筒壁２の表面温度を
150℃で１分間保持して局所加熱を行う。ついで
ふん囲気温度150℃に保つた焼成炉にバンドヒー
ター３を取外した金型を挿入、15分間保持して炉
から取出し、放冷、脱型する。Mold: Outer diameter = 50mm, Inner diameter = 40mm, Length = 350mm Core metal: Diameter = 30mm, Length = 300mm Local heating means: Band heater (code 3) 200V, 250W, width of one band = 50mm, heaters mutual Spacing = 15mm Filler: Addition reaction silicone rubber (Shin-Etsu Chemical Co., Ltd.)
(manufactured by X34-061) Example 5 See Figure 3. After filling the mold by injecting the filler through the injection hole 5, the band heater 3 is energized to control the surface temperature of the cylinder wall 2 near the band heater 3.
Local heating is performed by holding at 150°C for 1 minute. Next, the mold with the band heater 3 removed is inserted into a firing furnace kept at an ambient temperature of 150°C, held for 15 minutes, taken out from the furnace, allowed to cool, and demolded.
実施例 ６
局所加熱保持時間を２分としたことを除き実施
例５と同様である。Example 6 Same as Example 5 except that the local heating retention time was 2 minutes.
実施例 ７
第５図参照。金型内に外型39mm、長さ320mm、
厚さ50μｍのPFAチユーブ４（グンゼ(株)製）を挿
入し、チユーブ末端を図示のように筒壁２と端板
とではさんで固定し、注入孔５から充填物を金型
に注入して満たした後、バンドヒーター３の近く
における筒壁２の表面温度を150℃で１分間保持
して局所加熱を行う。その後の処理方法、条件は
実施例５と同様である。Example 7 See Figure 5. Outer mold 39mm inside the mold, length 320mm,
Insert a PFA tube 4 (manufactured by Gunze Co., Ltd.) with a thickness of 50 μm, fix the end of the tube between the cylinder wall 2 and the end plate as shown, and inject the filling material into the mold through the injection hole 5. After filling the tube with water, the surface temperature of the cylinder wall 2 near the band heater 3 is maintained at 150° C. for 1 minute to perform local heating. The subsequent processing method and conditions are the same as in Example 5.
対照例 ４
第３図参照。この対照例は焼成炉中の加熱を行
わず、かつ局所加熱時間を25分とし加硫を完了さ
せたことを除き実施例５と同様である。Control example 4 See Figure 3. This control example is the same as Example 5, except that no heating was performed in the kiln and the local heating time was 25 minutes to complete vulcanization.
対照例 ５
この対称例は実施例５に使用した金型および心
金を使用し、バンドヒーター３を取外し、対照例
１と同一条件において焼成炉中の加熱を行つたも
のであるが、成型物は対照例１と同様なクラウン
状を呈した。Comparative Example 5 This symmetrical example uses the mold and mandrel used in Example 5, removes the band heater 3, and heats in the kiln under the same conditions as Comparative Example 1. exhibited a crown shape similar to that of Control Example 1.
実施例５〜７および対照例４および５により生
産されたローラーの非直筒性の成績を第７図に掲
げる。ただし、図中の長さの数値は第６図と同
様、ローラーの全長を10等分した各位置を示して
いる。即ち、この図表からわかるように、中央部
の局所加熱を行うことにより、逆クラウン状のロ
ーラーが生産されるのみならず、局所加熱の条件
の選定により所望の逆クラウン量をもつローラー
を得ることができる。また、対照例４からわかる
ように、長時間の局所加熱のみによつて加硫を完
了させた場合は、逆クラウン量が過大となり、用
紙の紙しわ発生防止の目的には不適当である。 The results of non-straight cylindrical properties of the rollers produced in Examples 5 to 7 and Control Examples 4 and 5 are shown in FIG. However, the length values in the figure indicate the positions where the total length of the roller is divided into 10 equal parts, as in Figure 6. In other words, as can be seen from this diagram, not only can a roller with an inverted crown shape be produced by locally heating the central portion, but also a roller with a desired amount of inverted crown can be obtained by selecting local heating conditions. I can do it. Further, as can be seen from Comparative Example 4, when vulcanization is completed only by long-term local heating, the amount of reverse crown becomes excessive, which is inappropriate for the purpose of preventing paper wrinkles.
（発明の効果）
かくしてこの発明によれば、成型型を用いる加
硫成型のみにより、ローラー面の研削を要しない
でクラウン状、逆クラウン状など非直筒状のロー
ラーを容易に得ることができるのみならず、同一
の成型型を用いて、クラウン量、逆クラウン量等
の非直筒偏差量を自由に制御できる。さらに、き
わめて簡単な工程により非直筒状でフツ素樹脂の
被覆層をもつ定着ローラーが生産できることはこ
の発明方法の顕著な特典である。(Effects of the Invention) Thus, according to the present invention, it is possible to easily obtain a non-straight cylindrical roller such as a crown shape or an inverted crown shape by only vulcanization molding using a mold without the need for grinding the roller surface. Therefore, the amount of non-straight cylinder deviation such as the amount of crown and the amount of reverse crown can be freely controlled using the same mold. Furthermore, it is a remarkable advantage of the method of the present invention that a fixing roller having a non-linear cylindrical shape and having a coating layer of fluororesin can be produced by a very simple process.
第１図は一般に要求される定着ローラーの側面
図、第２図はこの発明の実施例１〜３における金
型の軸断面図、第３図は同じく実施例５および６
における金型の軸断面図、第４図は実施例４にお
ける金型の軸断面図、第５図は同じく実施例７に
おける金型の軸断面図、第６図はこの発明の実施
例１〜４および対照例１〜３によるローラーの非
直筒性の成績を示す線図、第７図は同じく実施例
５〜７および対照例４の非直筒性の成績を示す線
図である。
１は心金、２は筒壁、３はバンドヒーター、４
はフツ素樹脂チユーブ、５は注入孔、６は端板で
ある。
FIG. 1 is a side view of a generally required fixing roller, FIG. 2 is an axial sectional view of a mold in Examples 1 to 3 of the present invention, and FIG. 3 is a side view of a fixing roller generally required.
FIG. 4 is an axial sectional view of the mold in Example 4, FIG. 5 is an axial sectional view of the mold in Example 7, and FIG. 6 is an axial sectional view of the mold in Example 7. FIG. 7 is a diagram showing the results of non-straight cylindrical properties of rollers according to Examples 5-7 and Comparative Example 4. FIG. 1 is the core metal, 2 is the cylinder wall, 3 is the band heater, 4
5 is a fluororesin tube, 5 is an injection hole, and 6 is an end plate.
Claims (1)
応型シリコーンゴムを充填し、まず前記成型型の
筒壁の一または複数の環状局所の周面の加熱によ
り充填シリコーンゴムの前記環状局所に対応する
部分の加硫を促進し、ついで前記成型型の全体を
定温ふん囲気中で加熱することにより、充填シリ
コーンゴム全量の加硫を完了することを特徴とす
る非直筒定着ローラーの生産方法。 ２ 前記成型型の筒壁の内周面は滑らかな研磨面
であり、前記シリコーンゴムをその研磨面に直接
接触させて充填する特許請求の範囲１記載の非直
筒定着ローラーの生産方法。 ３ 前記成型型の筒壁の内径とコンパラブルな径
をもつフツ素樹脂チユーブを前記成型型に挿入固
定し、前記シリコーンゴムを前記フツ素樹脂チユ
ーブ内面に接触させて充填する特許請求の範囲１
記載の非直筒定着ローラーの生産方法。 ４ 前記した環状局所が前記筒壁の両端部である
特許請求の範囲２または３記載の非直筒定着ロー
ラーの生産方法。 ５ 前記した環状局所が前記筒壁の中央部である
特許請求の範囲２または３記載の非直筒定着ロー
ラーの生産方法。[Scope of Claims] 1. A straight cylindrical mold into which a mandrel is inserted and fixed is filled with an addition reaction type silicone rubber, and the filling is first performed by heating the circumferential surface of one or more annular localized areas on the cylindrical wall of the mold. vulcanization of a portion of the silicone rubber corresponding to the annular local area, and then heating the entire mold in a constant temperature atmosphere to complete vulcanization of the entire amount of the filled silicone rubber. Production method of straight tube fixing roller. 2. The method for producing a non-straight cylindrical fixing roller according to claim 1, wherein the inner circumferential surface of the cylindrical wall of the mold is a smooth polished surface, and the silicone rubber is filled in direct contact with the polished surface. 3. Claim 1, wherein a fluororesin tube having a diameter comparable to the inner diameter of the cylindrical wall of the mold is inserted and fixed into the mold, and the silicone rubber is brought into contact with the inner surface of the fluororesin tube and filled.
The method for producing the non-straight cylinder fixing roller described. 4. The method for producing a non-straight cylindrical fixing roller according to claim 2 or 3, wherein the annular regions are both ends of the cylindrical wall. 5. The method for producing a non-straight cylindrical fixing roller according to claim 2 or 3, wherein the annular local area is a central portion of the cylindrical wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5153087A JPS63218982A (en) | 1987-03-06 | 1987-03-06 | Production of non-straight cylindrical fixing roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5153087A JPS63218982A (en) | 1987-03-06 | 1987-03-06 | Production of non-straight cylindrical fixing roller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63218982A JPS63218982A (en) | 1988-09-12 |
| JPH0565874B2 true JPH0565874B2 (en) | 1993-09-20 |
Family
ID=12889574
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5153087A Granted JPS63218982A (en) | 1987-03-06 | 1987-03-06 | Production of non-straight cylindrical fixing roller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63218982A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0424053B1 (en) * | 1989-10-16 | 1995-12-27 | Canon Kabushiki Kaisha | Mold releasing elastic roller |
| JPH03233586A (en) * | 1990-02-09 | 1991-10-17 | Canon Inc | Fixing device |
| US5538677A (en) * | 1991-05-28 | 1996-07-23 | Canon Kabushiki Kaisha | Method of producing elastic roller whose external curved surface cylindrical shape is of varying diameter |
| JP4632731B2 (en) * | 2004-09-24 | 2011-02-16 | キヤノン化成株式会社 | Elastic roller manufacturing method, process cartridge, and image forming apparatus |
| JP2013167730A (en) * | 2012-02-15 | 2013-08-29 | Brother Ind Ltd | Fixing roller and manufacturing method of the same |
-
1987
- 1987-03-06 JP JP5153087A patent/JPS63218982A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63218982A (en) | 1988-09-12 |
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