JP4488480B2 - Applicator roller with roller jacket - Google Patents

Abstract

A typical coating machine has a rotating drum (1) with a perforated surface (6), dipping into a bath (12) of coating fluid (10). The fluid flows through the perforations (30) into the interior of the drum. A fluid film is formed inside (38) and outside (18) the drum. Films are lifted out of the bath. The outer portion of the outside film may drain back into the bath. The outer film is carried round until it approaches (24) the downwardly moving fabric strip (14). In the contact region (16) it adheres to the strip (22) and is carried away downward.

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an applicator roller comprising a roller mantle according to the premise of claim 1.
[0002]
The invention further relates to a method for coating a material web according to the preamble of claim 10.
[0003]
[Prior art]
For example, in a web rotary press such as a web rotary offset press, a material web is unwound from a stock roll of a web changer and passed vertically through a plurality of printing units arranged in sequence. And then passed through a dryer, such as a hot air dryer, for drying, and finally passed around the cooling roller of a cooling roller stand to cool the material web heated in the dryer. . Subsequently, the material web can be cut and folded with a folding device to form a signature, and the manufactured signature can be further fed to the dispensing system. Typically, the material web is multicolored on both sides by the printing unit, and conventional offset printing requires the use of fountain solution, so the material web must first be dried before post-processing and therefore cooled. Must-have.
[0004]
Prior art cooling roller stands typically have a plurality of cooling rollers through which a cooling medium flows, and the material web is passed through the cooling roller stand in a meander-like web path and around the cooling rollers. Passed.
[0005]
Furthermore, it is known to apply a liquid coating material, for example a silicone oil emulsion, to the entire surface of the material web by means of an applicator roller, in which case the applicator roller may be arranged inside a cooling roller stand. . Applying an emulsion of silicone oil and water to the printed material web in the form of a thin film prevents the product from being set off in the area of the turning bar or the folding device of the printing press. Furthermore, the printing ink under the silicon layer is also prevented from being transferred to a direction changing member such as a turning bar.
[0006]
An apparatus for coating a carrier web with a coating material, including an applicator roller that receives or pumps a coating material such as a silicone oil emulsion from a water tank, and the outer surface wetted with the coating material comes into contact with the carrier web. Is known.
[0007]
Since the surface properties of the applicator roller are not described in detail, this appears to be a normal closed smooth surface.
[0008]
Furthermore, Patent Document 2 describes a roller having relatively small openings regularly distributed on the surface. The rollers described herein can be used to transfer liquid to a surface or to receive surface liquid. Further, this roller may be configured as a water source roller provided with a water tank, or may be configured as a hollow roller on which liquid or negative pressure acts. Furthermore, this roller can also be used, for example, for dewatering paper, in which case the paper web is passed through the gap between the roller described above and another impression cylinder. At this time, the liquid absorbed by the capillary action of the opening by the above-described roller is pushed out from the sponge-like surface of the above-mentioned roller in another gap with another pressure cylinder.
[0009]
That is, the absorbent surface sucks the liquid in order to transfer the liquid to the web or to receive the liquid from the web. Patent Document 2 does not strictly distinguish between these two possibilities.
[0010]
Further, Patent Document 3 describes an apparatus for removing liquid from a running belt material. In this case, for example, a hollow roller rolls on the surface of a belt material that is a cold-rolled metal belt that runs at high speed. The surface of the hollow roller is covered with at least one layer of absorbent material. Further, the hollow roller has a material having a through hole under the absorbent material, and the hole is formed in the hollow roller in which a negative pressure is generated from at least one layer of the absorbent material. It is provided for passing through the internal space.
[0011]
However, the above-described hollow roller having an absorbent surface cannot be used to apply liquid to the belt material.
[0012]
Patent Document 4 discloses a method of applying high-viscosity ink in an offset printing machine. In this case, a hollow roller whose surface is configured in a network structure is used, and the internal structure of the hollow roller is formed by this network structure. The printing ink passed to the outside reaches the outside and can be transferred to another roller. Residual ink that is not transferred is transported together during one complete rotation of the roller, and in the contact gap between this mesh roller and the following roller, due to the pressing force between both rollers. Pushed back to the network.
[0013]
However, the rollers disclosed herein do not have a surface for applying ink. Instead, the surface area is reduced as much as possible in order to create a large number of openings through which the ink application or transfer takes place.
[0014]
Finally, a dampening device for an offset printing machine is known from Patent Document 5, in which case the dampening water is taken out of the water tank by a water source roller and transferred to the reticulated surface of another roller, and is transferred to this roller. The spray air acts from the inside so that the transferred fountain solution is jetted from the mesh surface in the direction of the member to be wetted.
[0015]
FIGS. 9 to 15 show an applicator roller according to the prior art, which shows various configurations, i.e. different material web travel directions and different applicator roller rotation directions. The various forms shown produce different situations regarding the transport path of the liquid to be applied. Such a situation will be described in detail below.
[0016]
FIGS. 9 to 15 each show at least one applicator roller 1 having a rotating shaft 2, a direction of rotation 4, a roller mantle 6 and an outer mantle surface 8. By rotation of the applicator roller 1, the applicator roller 1 pumps a liquid 10, for example, an emulsion of silicon oil and water, from the water tank 12 by the outer outer surface 8. The outer mantle surface 8 of the applicator roller 1 that has been wetted with liquid rolls over the surface of the material web 14 being conveyed, while the liquid 10 pumped from the water tank 12 is transferred to the closed liquid film. Transfer in form to the surface of the material web 14.
[0017]
FIG. 9 shows a case in which the material web 14 is passed vertically from bottom to top and the applicator roller 1 operates in the forward direction.
[0018]
Here, the term “forward” means that the material web 14 and the applicator roller 1 are in the same direction at the contact area 16 between the surface side of the material web 14 and the outer mantle surface 8 of the applicator roller 1. It shall mean having a surface velocity. However, the surface speed values of the material web 14 and the applicator roller 1 may be different. Conversely, the term “reverse direction” means that the speed directions of the respective surface speeds of the material web 14 and the applicator roller 1 are opposite to each other in the contact area 16, The values of may have different numerical values.
[0019]
As can be seen from FIG. 9, a liquid film 18 is formed on the outer mantle surface 8 outside the roller mantle 6 and starts from the surface of the liquid 10 stored in the water tank and extends to the contact region 16. This liquid coating 18 is carried along with the mantle surface 8 as the applicator roller 1 rotates, causing the coating of the material web 14 with the liquid coating 20. Excess liquid that did not pass through the contact area 16 and thus contributed to the formation of the liquid film 20 is in the form of a liquid film 22 on the liquid film 18 carried together by the applicator roller 1 in the aquarium 12. Flowing back inside. In this way, if the guiding direction of the material web 14 and the rotation of the applicator roller 1 are configured in this way, an extra portion is provided on the applicator roller 1 or in the wedge-shaped gap 24 between the applicator roller 1 and the material web 14. There is no problem of accumulation of fresh liquid.
[0020]
FIG. 10 shows a situation when the rotation direction 4 of the applicator roller 1 is opposite to that in FIG. In this case, a liquid film 18 transferred to the material web 14 as a liquid film 22 in the wedge-shaped gap 24 is likewise formed on the surface 8 of the roller jacket 6 of the applicator roller 1. In this case, the applicator roller 1 operates in the opposite direction, so that the material web 14 completely absorbs the liquid carried in the wedge-shaped gap 14 in the form of a liquid film 22, so that excess liquid in the wedge-shaped gap 24. Will not accumulate. Furthermore, the liquid 10 that has been pumped out excessively returns to the water tank 12 in the form of the liquid film 20, and this liquid film 20 flows over the liquid film 18 by the action of gravity.
[0021]
FIG. 11 shows a situation in which the rotation direction 4 of the applicator roller 1 is maintained as it is compared to FIG. 9, but the traveling direction of the material web 14 is reversed. Again, excess liquid does not increase or accumulate in the wedge-shaped gap between the applicator roller 1 and the material web 14.
[0022]
FIG. 12 shows the applicator roller 1 operating in the forward direction, but the conveying direction of the material web 14 proceeds vertically from top to bottom as compared to FIG. As can be seen from FIG. 12, in this case, an excess liquid storage liquid 26 that is supplied from the liquid film 18 is formed in the wedge-shaped gap 24. As a result of the transport of the material web 14, a variation in the crimping force between the material web 14 and the applicator roller 1 occurs in the contact area 16, so that an additional amount of liquid 28 that varies at least over time is accumulated from the storage liquid 26. It is transferred to the material web 14. For example, a coating of such a material web 14 formed as a streak significantly reduces the quality of the printed product produced.
[0023]
As shown in FIGS. 13 to 15, the problem that liquid accumulates in the wedge-shaped gap between the applicator roller 1 and the material web 14 also occurs in the case of horizontal web guidance.
[0024]
FIG. 13 shows the applicator roller 1 operating in the forward direction and rotating at a rotational speed at which more liquid is carried from the aquarium 12 to the wedge-shaped gap 24 than is carried away in the form of the coating liquid film 20 by the contact area 16. Has been. In this case, the accumulating liquid 26 can be avoided or reduced if the rotational speed of the roller 1 is lowered. However, if the rotational speed is lowered, the liquid coating 20 of the material web 14 does not have the required thickness or layer thickness. The possibility of losing or becoming irregular, for example, is conceivable, so that a person skilled in the art can discourage the reduction of the rotational speed.
[0025]
FIG. 14 shows the applicator roller 1 of FIG. 13 operating in the opposite direction, so that no liquid accumulates in the wedge-shaped gap.
[0026]
The roller on the right side shown in FIG. 15 operates in the reverse direction according to the roller shown in FIG. 14, but rotates at a rotational speed higher than this, and in this case, the accumulation liquid 26 is formed in the wedge-shaped gap. It will be.
[0027]
[Patent Document 1]
German Patent Application Publication No. 19743741A1
[Patent Document 2]
US Pat. No. 3,923,936
[Patent Document 3]
German Patent Application Publication No. 2934005A1
[Patent Document 4]
German patent specification 199557453C1
[Patent Document 5]
US Pat. No. 4,188,882
[0028]
[Problems to be solved by the invention]
When applying liquid by the applicator roller, for example to the material web or another subsequent roller, excess liquid may accumulate in the form of a storage liquid in the wedge-shaped gap between the applicator roller and the material web or other rollers. There is no problem.
[0029]
Furthermore, when coating a material web, contact with the applicator roller may be weakened during transportation of the material web, for example due to material web fluttering, in which case excess liquid is formed in the wedge-shaped gap. There is a problem that the accumulation part can exit through the gap between the material web and the applicator roller, and thus form a coating of the material web with an uneven distribution. Such unevenness of coating can be discriminated by, for example, a final product such as a printed product, so that the quality of the final product is unacceptably deteriorated.
[0030]
Accordingly, it is an object of the present invention to provide an applicator roller capable of uniform application, transfer or coating.
[0031]
Another object of the present invention is to provide an applicator roller that prevents excess liquid from accumulating.
[0032]
It is also an object of the present invention to provide an applicator roller that replaces the roller known from the prior art or a transfer roller that replaces it.
[0033]
Yet another object of the present invention is to provide a method of coating a material web that prevents excess liquid from accumulating.
[0034]
Yet another object of the present invention is to eliminate or at least mitigate the aforementioned problems when applying or transferring liquids and coating with liquids.
[0035]
[Means for Solving the Problems]
These objects are achieved according to the invention by the features of claims 1 and / or 10. Other features of the invention are set out in the dependent claims.
[0036]
The applicator roller according to the present invention comprises a roller mantle, and the outer mantle surface of the outer surface of the roller mantle receives and transfers at least partly the liquid. The applicator roller according to the present invention has a perforation in the roller mantle. It is characterized by being discharged into the applicator roller through the through hole.
[0037]
The applicator roller of the present invention has the advantage that an even application and / or transfer of the liquid can be achieved, the outer jacket surface of the outer jacket of the applicator roller receiving the liquid and transferring at least a part thereof, At the same time, too much excess liquid is prevented from being received and transferred by the applicator roller.
[0038]
According to the invention, such excess liquid is discharged through the through-hole, i.e. through the opening in the roller mantle, into the applicator roller.
[0039]
As described above, according to the present invention, the applicator roller of the present invention has a mantle surface that performs two functions of receiving and transferring liquid and discharging excess liquid to the internal space of the applicator roller. In this way, there is the advantage that uniform application / transfer or uniform coating can be realized with a single applicator roller which is simply constructed structurally.
[0040]
Furthermore, unevenness of the material to be coated, for example a material web, caused by extra liquid or extra coating material can be prevented, thereby greatly improving the quality of such material. There is an advantage.
[0041]
In another embodiment of the present invention, the through-hole on the outer mantle surface of the applicator roller outer mantle is a wedge-shaped gap (between the applicator roller and a rotating member, particularly a roller or a barrel, which is disposed thereafter). Einlaufzwickel), or extra liquids such as water, dampening water, silicone oil and water emulsions, or inks in the wedge-shaped gap between the endlessly advanced member, especially the material web or paper web, It can be discharged into the inner space of the applicator roller.
[0042]
In this way, there is an advantage that the liquid can be prevented from accumulating in the wedge-shaped gap, or the liquid already accumulated in the wedge-shaped gap can be discharged again. Furthermore, the inner space of the applicator roller may be designed as a hollow chamber, i.e. the applicator roller may be designed as a hollow roller, so that liquid that reaches the inner space through the through hole can be easily discharged. can do.
[0043]
Furthermore, the applicator roller can pump liquid from the outer surface of the roller mantle from a water tank or storage container, or can be received or transferred from a previously disposed rotating member, in particular a roller. .
[0044]
Furthermore, the cooperation of the applicator roller with the aquarium or storage container from which the liquid used for coating is pumped also helps with the even application of the liquid, especially since the applicator roller is always sufficiently wet with the liquid. , Can prevent interruption of liquid supply. However, it is also conceivable to configure the rotating member arranged in front as a water source roller and transfer the liquid to the applicator roller through the transfer gap.
[0045]
Furthermore, the liquid can be sprayed on the surface of the applicator roller, or the liquid can be supplied by a chamber-type doctor operatively connected to the roller.
[0046]
Further, at least a part of the liquid discharged into the inner space of the applicator roller may be supplied again to the water tank through the through hole in the outer surface of the outer surface of the roller outer surface of the applicator roller. Since the water tank and the internal space of the applicator roller form one system of communicating pipes, the liquid water level in the water tank and the liquid water level in the internal space of the applicator roller are the same height. However, if the applicator roller is rotated, the liquid water level in the inner space of the roller can be lowered, and at the same time, a sufficiently low aperture ratio (ratio of the open area to the total area), for example, an aperture ratio of 10% or less. For example, the liquid water level can be reduced almost completely.
[0047]
In this way, the coating material or liquid discharged through the through hole into the inner space of the applicator roller again flows into the storage container through the through hole, and again wets the outer jacket surface of the applicator roller. There is an advantage of fulfilling.
[0048]
The through-hole of the applicator roller has the advantage of obviating the need for another means for discharging the liquid discharged into the inner space, for example axially through the journal of the applicator roller, i.e. omitting such means. This has the advantage that it can further reduce costs and labor during operation and maintenance of the applicator roller.
[0049]
However, for example, a slight negative pressure may be applied to the internal space of the applicator roller in order to absorb the liquid from the accumulated liquid in the wedge-shaped gap through the through hole. In this case, for example, a pump can be used, and the suction capability through the through hole of the roller mantle can be adjusted by such a pump.
[0050]
In order to prevent the liquid in the lower region, i.e. the liquid at the same level as the liquid level in the aquarium, from being aspirated, the interior of the applicator roller may be divided into two chambers, for example. Only is affected by negative pressure. In this case, the upper chamber can exert a negative pressure, in particular on the area of the applicator roller forming a wedge-shaped gap. Thereby, there is an advantage that the discharge amount of the excess liquid can be increased through the through hole.
[0051]
In another embodiment of the applicator roller according to the invention, the through-hole may be configured such that each working area in the axial direction of the applicator roller has at least one through-hole opening.
[0052]
At this time, the axial working area of the applicator roller means each area in the axial direction of the applicator roller configured to apply or transfer liquid. For example, the end area of the applicator roller does not belong to the working area of the applicator roller. By providing at least one through-hole opening in each axial working area of the applicator roller, i.e., at least one through-hole opening on the outer shell at any point in the circumferential direction within the working area. Being on the surface has the advantage that it is ensured that not only the application and transfer of the liquid but also the absorption of the excess liquid by the applicator roller is performed evenly in the axial direction. As a result, it is possible to prevent unevenness that is visible especially in printed products, such as the formation of streaks.
[0053]
Furthermore, for example, excess liquid is absorbed from the wedge-shaped gap with high uniformity when viewed in the axial direction. For example, when a highly viscous liquid is used, the accumulated liquid is reduced evenly when viewed in the axial direction. .
[0054]
Furthermore, the through hole may be configured such that a through hole opening arranged so as to be offset in the circumferential direction and the axial direction partially covers a common axial region, or such a linear through hole is formed. It may be configured as a hole.
[0055]
In addition to the above, the through hole, which is configured as a linear through hole in the roller jacket of the applicator roller and in which individual straight lines or elongated holes partially cover a common axial region, Useful for application and transfer, and thus for even application of the object to be coated.
[0056]
For example, the applicator roller is configured so that the through-hole opening has a length of less than 50 mm or 8 to 50 mm and a width of less than 1 mm or a width of 0.1 to 1 mm, for example a width of 0.25 mm. Is particularly preferred. The through-hole opening can be made in the roller jacket of the applicator roller by, for example, a laser device.
[0057]
The applicator roller according to the invention may have a drive, in particular a separate drive or motor.
[0058]
In other embodiments of the present invention, the applicator roller may also be driven to move sideways, i.e. to vibrate axially.
[0059]
The applicator roller of the present invention is preferably arranged in front of the first and / or second cooling roller of the cooling roller stand. For example, the applicator roller of the present invention is an emulsion of silicone and water in a section of the web path that runs vertically from top to bottom between the first and second cooling rollers of the cooling roller stand. Can be applied to a paper web. The applicator roller can then be arranged on the side of the material web or paper web, which is also provided with a second cooling roller, so that the emulsion can be fed into the web before the web passes through the subsequent cooling roller. It is applied to the surface, and printing ink transfer (Ablgen), roller transfer, and condensation on the cooling roller are prevented.
[0060]
In yet another embodiment of the present invention, the applicator roller may be configured so that the applicator roller has a higher suction capacity, for example, a sponge-like material or a sponge body of the applicator roller. It may be arranged inside. Accordingly, since the liquid is sucked inward from the through hole opening, there is an advantage that more liquid application than desired and uneven application do not occur. In particular, it is preferable to use a circular through-hole opening and an absorbent material in combination.
[0061]
Furthermore, the cooling roller stand, in particular the cooling roller stand incorporated in the dryer, or the cooling roller stand arranged immediately after the dryer has the applicator roller of the invention described above. You may make it.
[0062]
Furthermore, a printing machine, in particular a web rotary printing machine or a web rotary offset printing machine, is provided with an applicator roller as described above, or a cooling roller stand comprising such an applicator roller, or a dryer comprising such an applicator roller. It may be characterized by having.
[0063]
Applying a liquid, in particular a silicone oil emulsion, to the material web by the outer mantle surface of the applicator roller's roller mantle, the method of the present invention for coating a material web, in particular a web web in a web rotary press or web rotary offset press The method of the present invention for coating a coating is characterized in that excess liquid, in particular in the wedge-shaped gap between the applicator roller and the material web, is discharged into the applicator roller through a through-hole in the web jacket.
[0064]
The advantages described above in connection with the applicator roller of the present invention described above can also be obtained when carrying out the method of the present invention for coating a material web, in particular for an even coating of the material web. There is an advantage that the accumulation and increase of excess liquid can be reduced or even avoided.
[0065]
Excess liquid can be discharged through the through-hole, for example, by capillary action of the opening of the through-hole, gravity acting on the liquid, pressure of the liquid due to the height of the generated accumulated liquid, applicator roller and subsequent rollers Alternatively, it is performed by a pressing force in a gap with the material web, or a suction action of a pump or a negative pressure source that is operatively connected to the inner space of the applicator roller.
[0066]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
[0067]
In each drawing, the same code | symbol is attached | subjected to the component corresponding to each other.
[0068]
FIG. 1 shows an applicator roller 1 according to the invention comprising a roller mantle 6 and an outer mantle surface 8, the outer mantle surface 8 of the roller mantle 6 receiving a liquid film, at least part of which is a liquid film. Transfer to the material web 14 at the contact area 16 in the form of 22. According to the present invention, the roller mantle 6 has a through hole 30, and as shown in FIG. 12, excess liquid that may accumulate as a storage liquid 26 in the wedge-shaped gap passes through the through hole 30 and the applicator. It is discharged into the internal space 32 of the roller 1 where it is returned to the liquid 10 stored in the aquarium 12, for example in the form of a liquid coating 34.
[0069]
Since the liquid 10 stored in the water tank 12 inside the applicator roller 1 and inside the applicator roller 1 forms one system of communicating pipes, the liquid water level inside and outside the applicator roller 1 Are made equal so that excess liquid returns to the aquarium 12.
[0070]
Due to the pressing force generated in the contact area 16 between the applicator roller 1 and the material web 14, excess liquid is forced through the through-hole opening of the through-hole 30 into the applicator roller 1 or into the internal space 32.
[0071]
In the embodiment of the applicator roller 1 according to the invention shown in FIG. 1, a liquid film 20 is also formed on the liquid film 18 carried with the applicator roller 1 that flows back to the water tank 12 by gravity.
[0072]
The accumulation liquid 26 is prevented from forming in the wedge-shaped gap 24 (see FIG. 12), for example, by appropriate selection of through holes, that is, by the number, form or arrangement of openings on the surface of the roller 1, or by the applicator roller 1 It can be influenced or even controlled by the rotational speed. In this case, the rotational speed can also be set by the control unit.
[0073]
As can be further seen from FIG. 1, the inner jacket surface 36 of the roller mantle 6 also receives the liquid film 38 from the liquid storage container 10, but this liquid film 38 reaches the outer surface, ie the outer mantle surface 8 outside the roller mantle 6. Without rotation, it rotates with the applicator roller 1 and is supplied again to the stored liquid 10. In the case of the normal maximum number of rotations of the applicator roller 1 that is about 50 to 200 rotations per minute, the liquid flows out from the inside through the through hole 30 by the centrifugal force generated by the rotation of the applicator roller 1. There is nothing.
[0074]
It should be noted here that the rotational speed of the applicator roller 1 is advantageously chosen such that its surface speed takes a predetermined percentage of the speed of the material web, i.e. when the material is started, for example when starting the machine. When the web speed changes, it is advantageous to change the rotational speed of the applicator roller 1 accordingly. This percentage value is usually between 1% and 10%, for example between 2% and 5%, or less than about 3%. For example, the preferred applicator roller 1 in the context of a vertical web guide has a maximum speed of not more than 100 revolutions per minute, in particular 75 revolutions.
[0075]
FIG. 2 shows the applicator roller 1 of FIG. 1 but here operating in the opposite direction to the material web 14. Again, the surface 8 of the roller mantle 6 receives a sufficiently thick liquid coating 18 from the reservoir 12 so that the coating liquid coating 22 can be formed on the material web 14 with the desired thickness. In this way, it is possible to operate the applicator roller 1 in the forward direction or in the reverse direction, and in some cases, to alternate both the operating states without any problem.
[0076]
In addition, in the situation shown in FIGS. 10, 11, and 14, since the surface of the web 14 and the applicator roller 1 is not coated with a liquid in the contact region 16, the ink is applied on the applicator roller. The problem of increasing. On the other hand, by using the applicator roller of the present invention in the situation shown in FIG. 2, the roller surface 8 of the applicator roller 1 is wetted by the capillary action of the through-hole opening 42, so that this problem is solved. Is done.
[0077]
The phenomenon which becomes another problem of the applicator roller based on the prior art will be described here. Since the liquid must pass through the contact area when in the forward direction, operating the conventional applicator roller in the reverse direction results in more liquid being transferred than when operating in the forward direction.
[0078]
On the other hand, the applicator roller of the present invention can discharge liquid from the through-hole opening after passing through the contact area in this operation mode even in the forward direction, thus sufficiently transferring the liquid to the material web. be able to. Thus, the operator can advantageously select forward motion as in reverse motion, thereby preventing an increase in ink on the applicator roller.
[0079]
Further, FIG. 3 shows how the accumulation liquid 24 (see the roller on the right side of FIG. 15) can be formed in the wedge-shaped gap 26 in the case of horizontal web guidance by using the applicator roller 1 of the present invention. It is shown whether it can be prevented. Excess liquid is discharged into the interior 32 of the applicator roller 1 through the through-hole 30 in the area of the wedge-shaped gap 24 or the contact area 16, where in the form of a liquid film, the liquid is circulated to the liquid reserve 10 in the aquarium 12. Will be supplied again. A preferred applicator roller associated with a horizontal web guide has, for example, a diameter of 30 mm to 50 mm, in particular about 38 mm, and a maximum speed of 150 to 200 revolutions per minute.
[0080]
In contrast to that shown in FIG. 3, the applicator roller 1 according to the invention can also be operated advantageously in the forward direction in the case of horizontal web guidance (see the roller on the left in FIG. 15).
[0081]
FIG. 4 shows the roller jacket 6 of the applicator roller 1 according to the present invention together with the rotary shaft 2, and a through hole of the roller jacket 6 is shown in a region 40. This through-hole is configured as a linear through-hole, and the through-hole opening is arranged substantially parallel to the rotation axis and shifted in the axial direction and the circumferential direction.
[0082]
As can be further seen from FIG. 4, the axial working area 46, which is illustrated by the circumference indicated by both broken lines, has at least one through-hole opening. Although not shown in FIG. 4, the applicator roller according to the present invention may have a through-hole as illustrated in the region 40 over the entire effective surface of the roller mantle, so that the shaft Each directional working region 46, i.e. each axial region intended to transfer liquid, may be configured to have at least one through-hole opening 43.
[0083]
FIG. 5 is a schematic drawing in which the region 40 is enlarged, and it is possible to see the arrangement of the through-hole openings 42 that are shifted not only in the axial direction Y but also in the circumferential direction X. Each through-hole opening 42a to 42d has a length L and a width B, the length L extends in the axial direction, and the width B extends in the circumferential direction. As can be further understood from FIG. 5, the through-hole openings 42 a to 42 d cover the common axial region C. The shaft of the applicator roller 1 which does not have at least one through-hole opening or at least a part of the through-hole opening, if all the end areas of the through-hole opening 42 are thus overlapped. It can be ensured that there is no directional area, thereby preventing the formation of streaks due to excess liquid that has not been drained.
[0084]
As shown in FIG. 5, both through-hole openings 42b and 42d have an axial deviation or offset ΔY and a circumferential deviation or offset ΔX. The surface of the applicator roller 1 between the respective through-hole openings 42 is sufficiently wide according to the present invention to ensure that the liquid can be sufficiently pumped out and received and transferred in the desired amount. Is done. For example, it is preferable that the ratio of the total area of the openings 42 to the entire surface of the applicator roller 1 is intended to be selected within a range of 1% to 50%. In order to reduce or prevent the accumulating liquid 26, it is preferred to select a ratio of less than 5%, in particular a ratio of less than 3% or in particular about 1%. For the applicator roller 1 to rewet the dried material web, for example in addition to the application of a silicone oil emulsion, it is preferred to select a ratio of more than about 10%.
[0085]
In addition to the linear through-holes, all other kinds of through-holes are conceivable, for example hole-like through-holes, in which the through-hole opening has a diameter of, for example, 1 mm to 10 mm, in particular about 2 mm or about 4 mm. It is preferable to have.
[0086]
Furthermore, in FIG. 6, the applicator roller 1 can also transfer the liquid film 18 to the roller 48 disposed thereafter, with the applicator roller 1 between the applicator roller 1 and the roller 48 disposed thereafter. It has been shown that there is an advantage that can be used to prevent the wedge-shaped gap 24 from accumulating liquid. Thus, for example, the applicator roller according to the present invention can also be used in an ink roller row or a dampening roller row inside an inking device or dampening device of a printing press.
[0087]
As shown in FIG. 7, the applicator roller 1 of the present invention has a roller 50 arranged in the front and a roller 48 arranged in the rear to a roller 48 arranged in the rear. It can also be used to transfer liquids. In this case, the applicator roller 1 according to the present invention, which can also be called a transfer roller, not only prevents the accumulation of liquid in the wedge-shaped gap 24 between the roller 48 and the applicator roller 1 arranged later, Accumulated liquid is also prevented from forming in the wedge-shaped gap 52 between the arranged roller 50 and the applicator roller 1. For example, surplus liquid such as water, ink, fountain solution, silicone oil emulsion, etc. is discharged to the inner space 32 of the applicator roller 1 through the through hole 30 in the roller sheath 6 of the applicator roller 1.
[0088]
The excess liquid is then carried away from the applicator roller 1 in the axial direction (as shown in FIG. 8) or by gravity through the through hole, also as shown in FIG. 7, for example in the form of a curved sheet. It is supplied to the water collection area 54 and from there it is supplied again to the liquid stockpile 10, in particular by means of a pump 56.
[0089]
On the other hand, as can be seen from FIG. 8, the amount of liquid discharged through the through-hole 30 and into the inner space 32 of the applicator roller 1 is, for example, a collection that comes into contact with the outer surface 36 of the applicator roller 1. It can also be collected by water means 58. The liquid 60 in the water collecting means 58 is then discharged, for example, axially from the inner space 32 of the applicator roller 1, for example through the end section or journal of the applicator roller 1, in particular to be supplied again to the liquid circulation. it can.
[Brief description of the drawings]
FIG. 1 shows an applicator roller according to the invention, in which a paper web is guided from top to bottom and the applicator roller is operated in the forward direction.
FIG. 2 shows an applicator roller according to the invention in which a web of material is guided vertically from top to bottom and the applicator roller operates in the reverse direction.
FIG. 3 shows an applicator roller according to the invention in which the material web is guided horizontally and the applicator roller operates in the reverse direction.
FIG. 4 is a view showing a roller mantle of an applicator roller of the present invention having a through hole.
FIG. 5 is a partial view showing a mantle surface of a roller mantle of the applicator roller of the present invention.
FIG. 6 shows an applicator roller of the present invention with a through hole in association with a subsequent roller.
FIG. 7 shows an applicator roller of the present invention with a through hole in association with a preceding roller and a succeeding roller.
FIG. 8 is a view showing an applicator roller of the present invention having a through-hole provided with a discharge member disposed in an internal space of the applicator roller.
FIG. 9 shows an applicator roller according to the prior art in which the material web is guided vertically from bottom to top and the applicator roller operates in the forward direction.
FIG. 10 shows an applicator roller according to the prior art, in which the material web is guided vertically from bottom to top and the applicator roller operates in the reverse direction.
FIG. 11 shows an applicator roller according to the prior art, in which the material web is guided vertically from top to bottom and the applicator roller operates in the reverse direction.
FIG. 12 shows a prior art applicator roller in which a web of material is guided vertically from top to bottom and the applicator roller operates in the same direction.
FIG. 13 shows an applicator roller according to the prior art, in which the material web is guided horizontally and the applicator roller operates in the forward direction.
FIG. 14 shows an applicator roller according to the prior art in which the material web is guided horizontally and the applicator roller operates in the reverse direction.
FIG. 15 shows a web web guided in a horizontal direction, one applicator roller operating in the reverse direction and another applicator roller operating in the forward direction, respectively. It is a figure which shows one applicator roller.
[Explanation of symbols]
1 Applicator roller
2 Rotating shaft
4 direction of rotation
6 Roller cloak
8 Outer mantle
10 liquid
12 Aquarium
14 Material web
16 Contact area
18 Liquid coating
20 Liquid coating
22 Liquid coating
24 wedge-shaped gap
26 Accumulated liquid
28 Additional amount of liquid
30 Through hole
32 Internal space
34 Liquid coating
36 Inner mantle
38 Liquid coating
40 areas
42 Through hole
42a to 42d Through-hole opening
46 Area of action
48 Rollers placed behind
50 Rollers placed in front
52 Wedge-shaped gap
54 Catchment area
56 pumps
58 Water collection means
60 liquid

Claims (9)

The outer mantle surface (8) is provided with a roller mantle (6) which receives the liquid (10, 18, 20) and transfers at least a part thereof, and the roller mantle (6) is provided with a through hole (30, 42, 42a-). d) an applicator roller having excess liquid (26) discharged through this through hole into the interior space (32) of the applicator roller (1) ,
The applicator roller (1) pumps the liquid (10) out of the water tub (12) by the outer mantle surface (8) of the roller mantle (6) or is arranged in front of the rotating member (50), in particular the roller An applicator roller characterized by receiving from . The through-holes (30, 42, 42a-d) are formed by the applicator roller (1) and a rotating member (48) arranged thereafter, in particular a member that advances forward between the rollers or the trunk or endlessly ( 14), in particular excess liquid, especially water in the wedge-shaped gap (24) between the material web or paper web, fountain solution, silicone oil emulsion or ink, the internal space of the previous SL applicator roller (1) ( The applicator roller according to claim 1, wherein the applicator roller is discharged to 32). At least a part of the liquid (34) discharged into the internal space (32) of the applicator roller (1) is supplied to the water tank (12) through the through holes (30, 42, 42a-d). The applicator roller according to claim 1 . The through-holes (30, 42, 42a-d) are arranged such that each action region (46) in the axial direction of the applicator roller (1) has at least one through-hole opening (42, 42a-d). is configured, the applicator roller according to any one of claims 1 to 3.   The through holes (30, 42, 42a-d) are partially shared by the through hole openings (42, 42a-d) in which the through holes (42, 42a-d) are arranged so as to be shifted in the circumferential direction (X) and the axial direction (Y). The applicator roller according to any one of claims 1 to 4, wherein the applicator roller is configured to cover the directional area (C) or as a linear through hole (42, 42a-d). The applicator roller according to claim 5 , wherein the through-hole opening (30, 42, 42a-42d) has a length (L) shorter than 50 mm and a width (B) shorter than 1 mm. The applicator roller according to any one of claims 1 to 6 , wherein the applicator roller (1) has an absorbent material, in particular a sponge-like material or a sponge body. . The applicator roller (1) according to any one of claims 1 to 7 , wherein the applicator roller (1) according to any one of claims 1 to 7 is used in a cooling roller stand, in particular a cooling roller stand incorporated in a dryer, or a cooling roller stand arranged immediately after the dryer. A cooling roller stand comprising at least one. A printing press, in particular a web rotary printing press or a web rotary offset printing press, comprising at least one applicator roller (1) according to any one of claims 1 to 7 , or from claim 1 A cooling roller stand comprising at least one applicator roller (1) according to any one of claims 7 to 7 , or an applicator roller (1) according to any one of claims 1 to 7 A drier, in particular a hot air drier, in which a cooling roller stand having at least one) is incorporated or arranged immediately after.

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