JPH0342290A - Damping roller for offset printing and manufacture thereof - Google Patents
Damping roller for offset printing and manufacture thereofInfo
- Publication number
- JPH0342290A JPH0342290A JP17675089A JP17675089A JPH0342290A JP H0342290 A JPH0342290 A JP H0342290A JP 17675089 A JP17675089 A JP 17675089A JP 17675089 A JP17675089 A JP 17675089A JP H0342290 A JPH0342290 A JP H0342290A
- Authority
- JP
- Japan
- Prior art keywords
- glass
- micropores
- roller
- cylinder
- damping
- 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
- 238000007645 offset printing Methods 0.000 title claims description 4
- 238000004519 manufacturing process Methods 0.000 title claims description 3
- 238000013016 damping Methods 0.000 title abstract 5
- 239000011521 glass Substances 0.000 claims abstract description 25
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000000843 powder Substances 0.000 claims abstract description 13
- 238000001816 cooling Methods 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 5
- 239000000919 ceramic Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 21
- 238000007639 printing Methods 0.000 abstract description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 6
- 238000007789 sealing Methods 0.000 abstract description 4
- 238000011109 contamination Methods 0.000 abstract description 3
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 abstract description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 abstract description 2
- 238000000576 coating method Methods 0.000 abstract description 2
- 239000000377 silicon dioxide Substances 0.000 abstract description 2
- 239000011248 coating agent Substances 0.000 abstract 1
- 229910052681 coesite Inorganic materials 0.000 abstract 1
- 229910052593 corundum Inorganic materials 0.000 abstract 1
- 229910052906 cristobalite Inorganic materials 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 238000002844 melting Methods 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 239000006060 molten glass Substances 0.000 abstract 1
- 239000011368 organic material Substances 0.000 abstract 1
- 239000005368 silicate glass Substances 0.000 abstract 1
- 235000012239 silicon dioxide Nutrition 0.000 abstract 1
- 229910052682 stishovite Inorganic materials 0.000 abstract 1
- 229910052905 tridymite Inorganic materials 0.000 abstract 1
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 1
- 230000008595 infiltration Effects 0.000 description 5
- 238000001764 infiltration Methods 0.000 description 5
- 230000003746 surface roughness Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000005416 organic matter Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000000156 glass melt Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- WHOPEPSOPUIRQQ-UHFFFAOYSA-N oxoaluminum Chemical compound O1[Al]O[Al]1 WHOPEPSOPUIRQQ-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000007751 thermal spraying Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Landscapes
- Printing Plates And Materials Therefor (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、オフセット平版印刷機に使用される湿しロー
ラおよびその製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a dampening roller used in an offset lithographic printing machine and a method for manufacturing the same.
平版表面の水と油脂の反撥作用を利用したオフセット平
版印刷機にはインキ供給装置のほかに、版面に湿し水を
付与する湿しローラが付帯している。湿しローラは、そ
の機能上、水との濡れ性が良く、ローラ周面にムラなく
−様な水膜が形成されることが必要である。In addition to an ink supply device, an offset lithographic printing machine that utilizes the repulsion of water and oil on the surface of a lithographic plate is equipped with a dampening roller that applies dampening water to the plate surface. In order to function, the dampening roller needs to have good wettability with water and to form an even water film on the circumferential surface of the roller.
従来よりその湿しローラとして、胴部周面にクロムめっ
きを施したものが使用されてきた。そのクロムめっき面
は、良好な平滑面を有し、かつ耐摩耗性にもすぐれてい
るが、水に対する濡れ性はあまり良くない（水の接触角
θ：約８０つ。Traditionally, dampening rollers with chrome plating applied to the circumferential surface of the body have been used. The chrome plated surface has a good smoothness and excellent wear resistance, but its wettability with water is not very good (water contact angle θ: about 80 degrees).
近時、その濡れ性を改良した湿しローラとして、ローラ
胴部の母材表面にアルミナセラミック層を溶射形威し、
表面を研削加工したセラミックローラが提案されている
。Recently, as a dampening roller with improved wettability, an alumina ceramic layer is thermally sprayed on the surface of the base material of the roller body.
A ceramic roller with a ground surface has been proposed.
〔発明が解決しようとする課題］
アルミナセラミックで被覆された湿しローラの胴部表面
は水に対する良好な濡れ性を有してはいるが、その膜面
ば緻密性に乏しく多数の微小ポアが存在しているため、
有機物や印刷インキ等の異物の付着による汚染がはげし
く、使用中に濡れ性が著しく低下してしまう。溶射皮膜
に代え、焼結晶を使用した場合でも、研削加工を加えて
得られる表面粗さは、精々Ｉｓ程度であって、有機物や
印刷インキの付着・汚染を十分に防止し得る程の滑らか
さ（例えば、クロムめっきローラ並みの表面粗さ）をも
たせることは不可能である。[Problem to be solved by the invention] Although the body surface of the dampening roller coated with alumina ceramic has good wettability with water, the film surface is not dense and has many micropores. Because it exists,
Contamination due to adhesion of foreign substances such as organic matter and printing ink is severe, and wettability is significantly reduced during use. Even when baked crystals are used instead of thermally sprayed coatings, the surface roughness obtained by grinding is at most Is level, which is smooth enough to prevent the adhesion and contamination of organic matter and printing ink. (For example, it is impossible to have a surface roughness comparable to that of a chrome-plated roller).
このため、ローラ表面を再生するための洗浄処理を頻繁
に行わねばならず、ローラメンテナンスに多大のコスト
と労力を必要とし、かつ印刷能率の低下を余儀なくされ
るという欠点があり、その実用化が妨げられている。For this reason, cleaning treatment must be performed frequently to regenerate the roller surface, which requires a great deal of cost and labor for roller maintenance, and also reduces printing efficiency, making it difficult to put it into practical use. hindered.
本発明は、湿しローラに関する上記問題点を解決するた
めになされたものである。The present invention has been made to solve the above-mentioned problems regarding dampening rollers.
本発明の湿しローラは、アルミナセラ主ツクからなるロ
ーラ胴部表面を有し、そのセラミック表面の微小ポアが
ガラスで被封されていることを特徴としている。The dampening roller of the present invention is characterized in that it has a roller body surface mainly made of alumina ceramic, and that micropores on the ceramic surface are sealed with glass.
ローラ胴部表面をアルミナセラくツクとする湿しローラ
は水に対する良好な濡れ性（水との接触角θ：約３５〜
５０つを有しているが、前述のようにその表面は多数の
微小ポアが存在しているため、高度の研削加工を加えて
も、平滑面とすることができない。本発明は、その微小
ポアにガラスを湿潤させ微小ポアを被封することにより
凹凸をなくし、滑らかな表面をもたせている。The dampening roller whose body surface is made of alumina has good wettability with water (contact angle θ with water: approximately 35~
However, as mentioned above, the surface has many micropores, so even if a high-level grinding process is applied, it cannot be made into a smooth surface. The present invention eliminates unevenness and provides a smooth surface by wetting the micropores with glass and sealing the micropores.
上記胴部表面の微小ポアを被封するガラスは特別のもの
である必要はなく、例えば石英ガラス、あるいはＳｉＯ
，ＣａＯ，Ａｌ２Ｏ２，Ｎａ２Ｏ等を主構成分とする各
種けい酸塩ガラスであってよい。The glass that seals the micropores on the surface of the body does not need to be special, for example, quartz glass or SiO
, CaO, Al2O2, Na2O, etc. as main constituents.
本発明の湿しローラは、アルミナセラミックからなる表
面を有するローラ胴部を、ガラス粉末で被覆し、ガラス
粉末を加熱溶融して適当時間保持することによりガラス
融液を微小ポア内に浸潤させたのち、冷却し、ついでそ
の表面を研削加工することにより製造される。In the dampening roller of the present invention, a roller body having a surface made of alumina ceramic is coated with glass powder, and the glass powder is heated and melted and held for an appropriate time to infiltrate the glass melt into micropores. Afterwards, it is manufactured by cooling and then grinding the surface.
ローラ胴部の表面をなすアルミナセラミックは、適宜の
胴部母材（例えば、鋼製円筒体）に溶射法により形成し
たものであってよく、また円筒形状の焼結晶であってよ
い。The alumina ceramic forming the surface of the roller body may be formed on a suitable body base material (for example, a steel cylinder) by thermal spraying, or may be a cylindrical fired crystal.
胴部表面のアルミナセラミックに対するガラス浸潤処理
によるガラスの浸潤深さは、概ね数閣（例えば２〜５ａ
ｗｍ）であってよい。The glass infiltration depth by the glass infiltration treatment for the alumina ceramic on the surface of the body is approximately several degrees (for example, 2 to 5 mm).
wm).
ガラス浸潤処理後の研削加工は、代表的には円筒研削盤
上、ダイヤモンド砥石を用いて行われる。Grinding after glass infiltration treatment is typically performed on a cylindrical grinder using a diamond grindstone.
研削加工代は、例えば０．５〜２鵬程度であってよい。The grinding allowance may be, for example, about 0.5 to 2 centimeters.
ローラ胴部のアルミナセラミックの微小ポアがガラスに
より被封されることにより、微小ポアによる表面凹凸が
消去され、研削加工により、例えば従来のクロムめっき
ローラと同等ないしそれ以上の滑らかな表面（表面粗さ
：例えば０．３Ｓ以下）が与えられる。By sealing the micropores of the alumina ceramic in the roller body with glass, the surface irregularities caused by the micropores are eliminated, and the grinding process creates a smooth surface (surface roughness) that is equal to or better than that of conventional chrome-plated rollers. (for example, 0.3S or less) is given.
また、ガラスは水との濡れ性が良く（接触角θ−〇）、
アルミナセラミック表面の濡れ性を損なうことはない。In addition, glass has good wettability with water (contact angle θ−〇),
It does not impair the wettability of the alumina ceramic surface.
そのローラ胴部表面は水に対する良好な濡れ性（接触角
θ：約３０〜４０°）を有し、均一な水膜が形成される
ことにより、版胴表面に対する安定した吸水機能を果た
す。The surface of the roller body has good wettability with water (contact angle θ: about 30 to 40°), and a uniform water film is formed, thereby achieving a stable water absorption function on the surface of the plate cylinder.
更に、アルミナセラミックおよびその微小ポアを被封す
るガラスは極めて硬質であることにより、胴部表面は高
耐摩耗性を帯有している。Furthermore, since the alumina ceramic and the glass that seals its micropores are extremely hard, the surface of the body has high wear resistance.
旦二立団盟社 アルミナセラミック焼結円筒体（外径：１０ｍ。 Daneridanmeisha Alumina ceramic sintered cylinder (outer diameter: 10m).
胴長；５００）、空隙率二８．９％。外周面表面粗さ：
約ＩＳ。Body length: 500), porosity: 28.9%. Outer surface roughness:
About IS.
ヱｉ五粧朱
炭酸カルシウム粉末、シリカ粉末、およびアルミナ粉末
の混合物（ＣａＯ： Ａｌｔｏｓ： ５ｉｆｔのモル比
＝１ ： １ ： ２）をバッチ炉中、１６００℃で加
熱溶融した後、水冷し、その固化物を粉砕し、粒径１〜
１０園のガラス粉末とした。A mixture of Goshoshu calcium carbonate powder, silica powder, and alumina powder (molar ratio of CaO: Altos: 5ift = 1:1:2) was heated and melted at 1600°C in a batch furnace, and then cooled with water. Grind the solidified material to a particle size of 1~
It was made into 10 glass powders.
上記ガラス粉末を耐火物製ベッセルに入れ、ガラス粉末
中にローラ胴部材であるアルミナセラミック焼結円筒体
を埋覆したうえ、１５００℃の雰囲気炉内でガラス粉末
を溶融し、■時間を要してガラス融液を浸潤させた。The above glass powder was placed in a refractory vessel, and an alumina ceramic sintered cylinder, which is a roller body member, was buried in the glass powder, and then the glass powder was melted in an atmospheric furnace at 1500°C, which took a long time. to infiltrate the glass melt.
ガラス浸潤処理後、円筒研削盤上七ダイヤモンド砥石に
よる研削加工を加えた。After the glass infiltration treatment, grinding was performed using a seven-diamond grindstone on a cylindrical grinder.
得られたローラ胴部の表面性状測定結果を第１表に示す
。比較材は、アルミナセラミ・ンク焼結円筒体（ガラス
浸潤処理なし）の表面に上記と同じ研削加工を加えたも
のである。Table 1 shows the results of measuring the surface properties of the obtained roller body. The comparative material is an alumina-ceramic sintered cylindrical body (without glass infiltration treatment) whose surface is subjected to the same grinding process as above.
第 １ 表
発明例 比較例
表面粗さ ： ０．２Ｓ ＩＳ水の
接触角（θ）＝３５° ４５゜表面硬度（Ｖ
Ｈ） ： １３５０ １３５０〔発明の
効果〕
本発明のオフセット印刷用湿しローラは、従来のクロム
めっきローラ（水の接触角θ：約８０′）に比しすぐれ
た濡れ性を有している。しかも、その表面のアルミナセ
ラミックは、微小ポアがガラスで被封されているので平
滑・緻密性にすぐれており、実使用中の有機物や印刷イ
ンキの付着汚染を生じにくく、版胴に対する安定した給
水機能を維持する。また、長期使用により表面の汚染が
生した場合でも、微小ポアの多数存在する場合のような
洗浄の困難はなく、軽い水洗いにより簡単にしかも完全
に清浄な表面に回復させることができる。Table 1 Invention example Comparative example Surface roughness: 0.2S IS water contact angle (θ) = 35° 45° Surface hardness (V
H): 1350 1350 [Effects of the Invention] The dampening roller for offset printing of the present invention has superior wettability compared to a conventional chrome-plated roller (water contact angle θ: about 80'). In addition, the alumina ceramic surface has fine pores sealed with glass, making it highly smooth and dense, making it less likely to be contaminated by organic matter or printing ink during actual use, and providing stable water supply to the plate cylinder. Maintain functionality. Furthermore, even if the surface becomes contaminated due to long-term use, cleaning is not as difficult as in the case of a large number of micropores, and the surface can be easily restored to a completely clean surface by light washing with water.
従って、ローラメンテナンスの大幅な軽減と印刷能率お
よび印刷品質の向上等に大きな効果が得られる。Therefore, significant effects such as a significant reduction in roller maintenance and improvement in printing efficiency and printing quality can be obtained.
Claims (1)
、そのセラミック表面の微小ポアがガラスで被封されて
いることを特徴とするオフセット印刷用湿しローラ。 ２、アルミナセラミックからなる表面を有するローラ胴
部を、ガラス粉末で被覆し、ガラス粉末を加熱溶融して
アルミナセラミック表面の微小ポアに浸潤させ、冷却後
その胴部表面を研削加工することを特徴とする請求項１
に記載のオフセット印刷用湿しローラの製造方法。[Claims] 1. A dampening roller for offset printing, characterized in that the roller body surface is made of alumina ceramic, and the micropores on the ceramic surface are sealed with glass. 2. The roller body with a surface made of alumina ceramic is coated with glass powder, the glass powder is heated and melted to infiltrate into the micropores on the alumina ceramic surface, and after cooling, the surface of the body is ground. Claim 1
A method for manufacturing a dampening roller for offset printing as described in .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1176750A JPH0815824B2 (en) | 1989-07-07 | 1989-07-07 | Method for manufacturing dampening roller for offset printing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1176750A JPH0815824B2 (en) | 1989-07-07 | 1989-07-07 | Method for manufacturing dampening roller for offset printing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0342290A true JPH0342290A (en) | 1991-02-22 |
| JPH0815824B2 JPH0815824B2 (en) | 1996-02-21 |
Family
ID=16019156
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1176750A Expired - Lifetime JPH0815824B2 (en) | 1989-07-07 | 1989-07-07 | Method for manufacturing dampening roller for offset printing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0815824B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0777066A2 (en) | 1995-10-30 | 1997-06-04 | Bando Chemical Industries, Limited | Tension member for belt, method of producing the same and belt including the same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62136353U (en) * | 1986-02-24 | 1987-08-27 | ||
| JPH0284395A (en) * | 1988-06-15 | 1990-03-26 | Nippon Steel Corp | Dampening roller for planographic press |
-
1989
- 1989-07-07 JP JP1176750A patent/JPH0815824B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62136353U (en) * | 1986-02-24 | 1987-08-27 | ||
| JPH0284395A (en) * | 1988-06-15 | 1990-03-26 | Nippon Steel Corp | Dampening roller for planographic press |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0777066A2 (en) | 1995-10-30 | 1997-06-04 | Bando Chemical Industries, Limited | Tension member for belt, method of producing the same and belt including the same |
| US6068916A (en) * | 1995-10-30 | 2000-05-30 | Bando Chemical Industries, Ltd. | Tension member for belt, method of producing the same and belt including the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0815824B2 (en) | 1996-02-21 |
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