JP2003503181A - Surface treatment equipment - Google Patents

Abstract

(57) Abstract: A surface treatment apparatus for moisturizing and / or cleaning a particularly high-speed rotating surface, particularly a paper web. A liquid transfer roller (32) is partially immersed in the liquid bath (30) to transfer the liquid to the processing web (16) at a predetermined point, and the point to be processed (6. 1, 6.2) before the second point (42) in the direction of movement, at which point the advancing surface (6.1, 6.2). Due to the spacing between the contact points (40, 42), the liquid has time to distribute evenly within the processing web (16). By doing so, a very small amount of moisture can be metered and transferred accurately, even under high movement speeds of the surface to be moistened or cleaned (6.1, 6.2).

Description

Detailed Description of the Invention

The present invention relates to a surface treatment device according to the preamble of claim 1. This allows the present invention to provide advancing surfaces in the form of a rotating cylindrical rotor outer surface, or one or both sides of an advancing material web of paper or foil or similar thin flexible material. A surface treatment device for moistening or for moistening and wiping, comprising at least one treatment unit for each surface to be treated by the surface treatment device, each treatment unit comprising: A positioning device with a pressing body for pressing a part of the processing web arranged for automatic movement onto the surface to be processed, and the side of the pressing body facing the surface to be cleaned. And a moisturizing device for moistening the treated web on the movement path toward the pressing body. On of the type that has the property to receive care.

A preferred field of application of the invention is the printing industry. In the printing industry, it is necessary to remove foreign matter such as paper dust and material web debris from the material web, especially the paper web, before the material web enters the printing unit of the printing press and is printed. Furthermore, it is advantageous to evenly moisten the paper web with a very small amount of water before it is folded in the folding device, in order to avoid paper breakage. The paper web to be moistened or the paper web to be dried can each be damaged when it enters the folding device. However, a very small amount of water is evenly distributed over the entire width and length of the paper web, and accurate metering is achieved by reducing the amount of water or the amount of liquid to be applied to the paper web. It will be difficult.

In the printing industry, it is possible to print not only paper webs, but also other material webs, for example foils having a flexibility and thinness similar to paper webs. Material webs made of synthetic resin or metal do not normally need to be moisturized, but to prevent them from breaking during the folding process, as with paper webs, dust and material web scraps (e.g. material webs are cut longitudinally) It is possible to remove material scraps generated at this time.

In the present invention, the cylindrical outer peripheral surface is humidified, or the rotating body that can be wiped after being humidified can be arbitrarily selected. In particular, mention may be made of cylinders, rollers and rolls of printing presses and, for example, blanket cylinders, plate cylinders, impression cylinders, material web guide rollers and material web cooling rollers, for example of offset printing machines.

A material web treatment device of the type described in the preamble of claim 1 for cleaning printed paper webs is known from European patent application EP 0527316 B1. This moisturizing device has a large number of nozzles, through which the liquid, preferably water, is sprayed through the nozzles before they reach the pressing body. Furthermore, it is known from this European patent application EP 0527316B1 that the cleaning cloth is wetted by its own hygroscopic action, by means of a means for supplying the liquid with almost no pressure, for example a slit. In this publication, there is no mention of whether or not a space should be provided between the moisture absorbing device and the pressing body, and if the space is required, how large the space should be. Furthermore, the drawings in this publication are only schematic.

From EP-A-0 672 526 A1 a cleaning device is known for cleaning one or both sides of a traveling printing paper web before the relevant part of the printing paper web enters the printing machine. . The cleaning device has a cleaning cloth, which can be transferred from the cleaning cloth roll to the used cloth roll and travels along the liquid transfer roller on its transfer path. A part of the transfer transfer roller is immersed in the liquid bath, and the water is transferred and transferred to the cleaning cloth that comes into contact with the transfer roller, and at the same time, the cleaning cloth is pressed against the paper web. Transfer The transfer roller has the advantage that it forms a substantially uniform liquid film over the transfer roller and this liquid film is transferred to the cleaning cloth. However, it is very difficult to obtain a uniform moisturization all over the paper web. The amount of liquid transferred from the liquid transfer transfer roller to the paper web by the cleaning cloth is not only affected by the relative velocities of the surfaces in contact with each other, but by the non-uniformity of the material and the effect of material processing of the cleaning cloth. Also receive. This known cleaning device has the following problems. As the paper web travels at speeds above 12 m / sec, for example, the liquid does not sufficiently penetrate the cleaning cloth, resulting in poor cleaning or liquid transfer between surfaces in contact with each other. Alternatively, transporting the cleaning cloth at a slower speed to increase the amount of liquid to be transferred causes a scraping effect between the cleaning cloth and the paper web, so that impurities scraped from the paper web are scraped into the scraping gap. Collect and fall over time into the machine or move with the paper web.

A device for cleaning a blanket cylinder of a printing press is known from British Patent Application Publication No. 2047167A. The cleaning cloth humidified by the nozzle can be pressed against the outer peripheral surface of the roller by the expandable rubber piece.

The object of the invention is to provide the possibility that even very small quantities of liquid can be precisely adjusted, evenly distributed and transferred, and that good cleaning or moistening of the surface of high-speed moving bodies can be achieved. Especially. This is to provide the possibility, for example, to achieve better print quality of the surface or better foldability of the paper web during transport.

The above object is achieved according to the invention by the features stated in the characterizing part of claim 1. In the surface treatment apparatus of the present invention, the moisturizing device has a liquid tank and at least one automatically driven liquid transfer transfer roller having a moisturizing outer peripheral surface, and is immersed in the liquid tank. The liquid is received from the liquid tank at the outer circumference of the roller on the immersion side (immersion side), and is transferred and transferred to the processing web at the outer circumference of the roller on the non-immersion side at a predetermined position. The above-mentioned predetermined position is separated from the position where the pressing body is pressed against the processing web, and the processing web is almost uniformly humidified on the movement path from the moisture receiving position of the processing web to the pressing position of the material web. Thus, it is characterized in that it has a sufficient time for the moisture to diffuse.

The features of the present invention will be described below. The amount of liquid can be accurately metered, which makes it well suited to different speeds of different materials, especially different paper qualities, material webs and material webs. Other features of the invention are set out in the dependent claims. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. The paper web 2 shown in FIGS. 1 and 2 has a web portion 6 extending substantially vertically between guide rollers 4 and 5, and is fed in the direction of an arrow 7 to enter a printing unit (not shown) of a printing press. . Note that, in another embodiment, the movement direction of the paper web 2 may be the opposite direction of the arrow 7, that is, the direction of the arrow 8 indicated by a broken line. In the present invention,
Instead of the paper web 2, a material web of synthetic resin or metal can be used. The material web may be printed on a printing press or otherwise processed on another machine. Alternatively, instead of the printing process being performed by the printing machine, the paper web 2 may be moved in the direction of arrow 7 or 8 and the folding process may be performed in the folding device.

In the present embodiment, one processing unit U1, U2 is arranged facing each other on the cleaning side or the humidifying surface side of the paper web 2. Both processing units U
Since 1 and U2 have almost the same structure, only one of them will be described and only a slight difference will be pointed out.

Each processing unit U1, U2 comprises a positioning device 10 which drives a drivable processing web 16, ie a part 14 of the cleaning cloth, on the material web side 6.1 or 6 of the paper web 2 to be processed. .2 has a pressing body 12 for pressing. Pressing body 12
Shows a semicircular shape, a fan shape 12.1 or a nose shape 12.2 in the illustrated sectional view. Pressing body 12
Is an operating device 18 such as a pneumatic cylinder, a hydraulic cylinder or an electromagnetic device,
The transverse movement of the paper web 2 can be adjusted to different positions on its surface 6.1 or 6.2, the pressing body 12 forming a stationary crosshead shoe with a curved surface in each adjusting position. The cleaning cloth 16 is guided along the shoe. Cleaning cloth 1
6 advances between the pressing body pressing body 12.1, 12.2 and the paper web 2.

The cleaning cloth 16 is fed from an unwinding shaft 26 equipped with a brake (not shown) to a motor 19
Is gradually separated in the direction of the arrow 24 to the take-up shaft 20 (used cloth roll) which is driven by the guide rollers 21, 22, 23 and the pressing body pressing bodies 12.1, 12.2.
Will be guided in.

The moisturizing device for humidifying the cleaning cloth 16 includes a liquid tank 30 containing a liquid, and a liquid transfer / transfer roller 32 in which a roller outer peripheral surface 34 is made of metal, preferably chrome, and has a closed surface. And have. The roller outer peripheral surface 34 can be formed of another material, for example, rubber or plastic, and it is possible to provide the unevenness or the opening instead of the closed smooth surface. However, in the preferred embodiment, it is a smooth surface of chromium. The liquid transfer roller 32 is rotatably supported and can be driven by a motor 36 in the direction of arrow 38. The liquid transfer roller 32 extends over the entire width of the cleaning cloth 16, and the cleaning cloth 16 extends over the entire width of the paper web 2. The liquid transfer roller 32 can contact the cleaning cloth 16 at a predetermined position 40 between the guide roller 22 and the point 42. At the predetermined portion 42, the cleaning cloth portion 1 which can be brought into contact with the pressing body pressing body by the pressing body pressing bodies 12.1 and 12.2.
4 can be pressed against the portion 44 of the paper web 2. As a result, the roller outer peripheral surface 3
4 and the liquid transferred from the liquid tank 30 to the cleaning cloth 16 have sufficient time on the path of movement from the contact point 40 to the other contact point 42 so that they are absorbed by the cleaning cloth 16 and A wet range in which water is evenly distributed is formed over the entire width and even in the longitudinal direction of the cleaning cloth. As a result, even when the paper web 2 rotates at a very high speed, a very small amount of liquid is delicately metered and transferred from the liquid tank 30 to the paper web 2.

During the printing operation of the printing machine, and thus during the movement of the paper web 2 in the arrow direction 7 or the arrow direction 8, the paper web 2 is constantly washed by the pressing bodies 12.1 and 12.2.
It is in contact with 6. At this time, the liquid is continuously transferred from the liquid tank to the cleaning cloth 16 by the liquid transfer roller 32 so that the idle operation does not occur between the cleaning cloth 16 and the paper web 2. When the idle operation occurs, there is a risk that the paper web 2 is damaged or the paper web 2 is electrostatically charged.

The present invention works even if synchronous operation is established between the surfaces in contact with each other, that is to say in the case of equal movement directions and equal movement velocities. However, in this case, the liquid will only be transferred from the liquid bath 30 to the paper web 2 and the paper web 2 will not be washed. In order to achieve the cleaning effect, it is necessary that a relative movement occurs between the cleaning cloth 16 and the paper web 2, and the cleaning cloth 16 is moved by the relative movement from the paper web 2 to remove foreign matters such as paper dust and paper waste. And it is possible to remove impure particles originating from the surrounding environment.

In this case, the cleaning cloth 16 is driven in the same direction as the paper web 2 (arrows 7 and 24), at a different speed of movement than the paper web 2 or in the opposite direction from the paper web 2 (arrow 7 and arrow 24). Arrows 8 and 24) can be driven. The direction of movement 24 of the cleaning cloth 16 is directed upwards in the pressure bodies 12.1, 12.2, so that dirt (dust, paper waste) does not fall and is caught in the used roll of the winding shaft 20. It is preferable.

The rotation direction 38 of the liquid transfer roller 32 is preferably such that the outer peripheral surface is along the cleaning cloth 16 in the same direction as the cleaning cloth 16 (or in the opposite direction), and the outer surface and the cleaning cloth are at the same speed. Or exercise at different speeds. The outer surface of the transfer roller 32 and the cleaning cloth preferably move at different speeds. By controlling the number of rotations of the liquid transfer roller 32, and in some cases the direction of rotation, relative to the speed and direction of movement of the cleaning cloth 16, and adjusting the immersion depth of the transfer roller 32 in the liquid tank 30. The amount of liquid transferred from the liquid transfer roller 32 to the cleaning cloth 16 can be adjusted.

The liquid transfer roller 32 is selectively adjusted to be moved to a stop position separated from the cleaning cloth 16 by the operation drive device 46 or moved to a position in contact with the cleaning cloth 16 at the point 40. . Further, in order to change the wrapping angle when the cleaning cloth 16 is wound around the liquid transfer roller 32 at the point 40, the liquid transfer roller 32 may be allowed to enter the cleaning cloth 16 slightly deeper. As a result, the liquid transfer roller 32 is removed from the cleaning cloth 1
The amount of liquid transferred to 6 can be adjusted as well. In FIG. 2, the liquid transfer roller 32 is positioned at a distance from the cleaning cloth 16 and the pressure bodies 12.1, 12.2 are adjusted at a distance from the cleaning cloth 16, so that the cleaning cloth 16 is also It is remote from the paper web 2 and there is no contact between them. This is the initial position when starting the printing press. Only after the minimum speed of the paper web 2 reaches, for example, 10% or more of the final speed after starting the printing machine, the liquid transfer roller 32 is moved from the separated position shown in FIG. 2 to the contact position shown in FIG. It moves and contacts the wash cloth 16 at point 40 to transfer liquid from the liquid bath 30 to the wash cloth. After that, the pressing bodies 12.1 and 12.2 also move from the separated position shown in FIG. 2 to the contact position shown in FIG. 1, and the moist cleaning cloth 16 is pressed against the paper web 2 at the point 42. The direction of movement of the cleaning cloth 16 is in the direction of the arrow 24, and always after the cleaning cloth first comes into contact with the liquid transfer roller 32 and is moistened, the cleaning cloth part reaches the pressing bodies 12.1, 12.2. It is like this.

The rotation speed of the liquid transfer roller 32 is adjusted or controlled or adjusted automatically according to the movement speed of the paper web 2 by automatic control, or according to the operation adjustment by an operator. Before starting the printing press, first the moist cleaning cloth part of the cleaning cloth 16 is fed from the liquid transfer roller 32 over the pressing bodies 12.1, 12.2, which presses the cleaning cloth 16 into the paper web 2 You have to be able to hit it against and press it. During the operation shown in FIG. 1, the cleaning cloth 16 is gradually conveyed from the take-up shaft 22 over the liquid transfer roller 32 and the pressing bodies 12.1 and 12.2, so that the cleaning cloth 16 presses the pressing bodies 12.1 and 12.2.
Ensure that the cleaning range in 12.2 is sufficiently moist. The number of transport stages of the cleaning cloth 16 per unit time is automatically controlled or adjusted depending on the movement speed of the paper web 2 and the operation adjustment of the operator. The paper dust and paper scraps wiped from the paper web 2 by the cleaning cloth 16 in the range of the pressing bodies 12.1 and 12.2 are held by the cleaning cloth 16 and wound on the used cloth roll on the winding shaft 20. , Stay in this used roll.

The roller outer peripheral surface 34 of the liquid transfer roll 32 has a property of holding a liquid.
The cleaning cloth 16 can absorb water from the outer peripheral surface 34 of the roller. The water penetrates the cleaning cloth 16 on the transport path between the contact points 40 and 42 and can be uniformly distributed in the cleaning cloth. The liquid transfer roller 32 is arranged on the side of the cleaning cloth 16 opposite to the paper web 2.

According to an embodiment not shown, the liquid transfer roller 32 may be arranged on the side of the cleaning cloth 16 facing the paper web 2. In this case, it is possible to use the cleaning cloth 16 formed so as to absorb the liquid only on the side facing the liquid transfer roller 32 and to prevent the liquid from passing on the opposite side of the cleaning cloth.

A separate liquid supply system is provided for each of the processing units U1 and U2 arranged on both sides of the paper web 2, or a common liquid reservoir 50 is provided as shown in FIG. From here, the liquid can be supplied to the liquid tanks 30 of both processing units U1, U2. The liquid is supplied from the liquid reservoir 50 to the processing unit U1 and the processing unit U by the pump 52 via the flow control device 54 and the feed pipes 56 and 58 connected thereto.
It can be supplied to two liquid tanks 30. Each liquid tank 30 has overflow means (not shown in detail) in order to keep the liquid level constant. The liquid overflowing from the liquid tank 30 returns to the liquid reservoir 50 through the return pipes 60 and 62 and the filter 64. The liquid reservoir 50 has, for example, a float switch 6 of the liquid reservoir 50 depending on its liquid level.
By controlling the valve 70 of the supply pipe 66, the liquid is replenished by the supply pipe 66.

The liquid may be pure water, water with additives, or other liquids, the so-called “fountain solution” used to form ink-repelling areas on the plate cylinder in the offset printing process. Is preferred. Such fountain solution consists of water to which alcohol or alternative alcohols and so-called additives have been added. These additives have a decisive effect on print quality and may include aids that prevent algal formation or bacterial growth in the fountain solution. The use of fountain solution is particularly rational when the printing press is an offset printing press, in particular a web offset printing press.

FIG. 3 shows a possible variant of the surface treatment device. FIG. 3 shows a roll 12.3 which can be rotated or driven without being fixed as a pressing body for pressing the cleaning cloth 16 against the paper web 2 and pressing it. Furthermore, FIG. 3 shows the possibility of using two or more liquid transfer rollers 32.1 and 32.2 instead of the only liquid transfer roller 32. Here, the liquid transfer roller 32.1 is partially immersed in the liquid tank 30 to receive the liquid on its outer peripheral surface. The last liquid transfer roller 32.2 in the liquid transfer path
Can come into contact with the contact point 40 with the cleaning cloth 16 and can be wrapped with more or less cleaning cloth depending on the embodiment. The transfer roller 32.1 and the transfer roller 32.2 are arranged parallel to each other and come into contact along their entire length along the contact line, so that the liquid is transferred from one liquid transfer roller to the other liquid transfer roller. It Both liquid transfer rollers are electrically driven. Instead of two liquid transfer rollers, more than two liquid transfer rollers can be used.

The surface treatment device according to the present invention is not limited to the advancing material web, for example the paper web 2, but also to the rotating surfaces of cylinders, rolls and rollers, in particular of printing machines and other machines for processing finished paper. It is also suitable for cleaning and moisturizing materials such as foils.

The cleaning cloth 16 may already have water on the unwind roll 26 in the form of water, dampening water for offset printing, detergent for cleaning the cylinder surface, or other organic or inorganic substances. It may be a "wet tissue" containing.

[Brief description of drawings]

FIG. 1 is a schematic view of a surface treatment apparatus according to the present invention in an operating state.

FIG. 2 is a schematic diagram of the surface treatment apparatus shown in FIG. 1 in a stopped state, which is connected to a liquid supply apparatus.

FIG. 3 is a schematic view of another embodiment of the processing unit of the surface processing apparatus according to the present invention.

Claims (11)

[Claims] 1. Wetting the advancing surface of a rotating cylindrical outer surface of a rotating body, or one or both sides of a moving material web, made of paper or foil or similar thin flexible material. For treating or for moistening and wiping, each surface (6.1.
, 6.2) with at least one processing unit (U1, U2), each processing unit having the following feature, namely a part of the processing web (16) arranged for automatic movement. A positioning device (10) having a pressing body (12.1; 12.2; 12.3) for pressing the surface of the object to be treated (6.1, 6.2), and a pressing body (12.1; 12.2; 12.3) surface to be cleaned (6.1, 6.2)
A transport device (20, 20) for transporting the treated web (16) along the side facing the
21, 22, 23, 26) and the treatment web (16) on the movement path (12.1; 12.2; 12.3) towards the pressing body (12.1; 12.2; 12.3). A moisturizing device for moistening, and the treatment web (16) has a property of receiving moisture from the moisturizing device, wherein the moisturizing device is a liquid tank (30). A roller outer peripheral surface having at least one automatically drivable liquid transfer roller (32) with a wettable roller outer peripheral surface (34) and being immersed in the liquid bath (30) Receives liquid from the liquid tank (30) on one side, and at a predetermined point (40) on the outer peripheral side of the other roller the processing web (16)
The point (40) is transferred to the pressing body (12.1; 12).
． 2; 12.3) is separated along the movement path of the treatment web (16) from the point (42) at which the treatment web (16) can be pressed, and the pressing point (42) from the moisture reception point (40) to the material web. Surface treatment, characterized in that on the movement path of the treated web (16) to (4) there is sufficient time for the water to diffuse so as to moisten the treated web (16) almost uniformly. apparatus. 2. The surface treating apparatus according to claim 1, wherein the treated web (16) is made of a material that absorbs moisture on at least one side of the web. 3. The treated web (16) is made of a liquid-absorbing material so that the liquid can completely permeate from one side of the web to the other side of the web, and the liquid of the pressing body (12) can be absorbed. The surface treatment apparatus according to claim 2, wherein the cleaning web completely penetrates in the pressing range. 4. At least one liquid transfer roller (32) is provided with a processing web (32).
16. The material according to claim 16, which is arranged on the side opposite to the material web.
The surface treatment device described. 5. At least one liquid transfer roller (32) has a closed outer peripheral surface (34) made of metal, in accordance with one of the preceding claims. Surface treatment equipment. 6. The surface treating apparatus according to claim 1, wherein the roller outer peripheral surface (34) is made of chromium. 7. The liquid transfer roller (32) is adjustable transversely to the treatment web (16) in different positions towards the surface of the treatment web (16). The surface treatment apparatus according to any one of 1 to 6. 8. The pressing body (12.1; 12.2; 12.3) is treated web (1).
Surface treatment device according to any one of the preceding claims, characterized in that it is adjustable transversely to 6) towards the surface of the treatment web (16) in different positions. 9. The pressing body (12.1; 12.2; 12.3) is a crosshead shoe, and the processing web (16) is slidably arranged beyond the crosshead shoe. The surface treatment apparatus according to any one of claims 1 to 8. 10. The surface treatment apparatus according to claim 1, wherein the pressing body (12.3) is a roll rotatably arranged. 11. At least one processing unit (U1, U2) is arranged on each side of the material web for treating both surfaces (6.1, 6.2) of the material web, and a liquid reservoir (1) is provided. 50) is provided, from which liquid can be supplied to all liquid tanks (30) of the processing units arranged on both sides of the material web. The surface treatment apparatus according to.