RU2607407C2 - Slurry coating device and slurry coating method - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: invention relates to a slurry coating device and to a slurry coating method and can be used as material of iron cores for transformers, electric generators. Slurry coating device for applying slurry on a running band-like body includes a slurry dispensing unit and a pair of coating nodes. Dispensing unit is configured to feed slurry on band-like body. Pair of units is configured to be able to apply fed slurry on a surface of band-like body by holding and pressing band-like body. Slurry dispensing unit is configured to feed slurry while changing relative position of dispensing unit and band-like body in a direction parallel to face of band-like body and perpendicular to running direction of band-like body. Dispensing unit is configured to oscillate relative to band-like body in a direction, parallel to surface of band-like body and perpendicular to feed direction of band-like body. Frequency of oscillations of dispensing unit is set based on pitch of turns of roll, into which band-like body is rolled. Slurry coating device for applying slurry on a moving band-like body may also include a swinging unit of band-like body, which enables oscillation of band-like body relative to dispensing unit in direction parallel to face surface of band-like body and perpendicular to feed direction thereof. Slurry coating method comprises feeding slurry onto moving band-like body when changing relative arrangement of dispensing opening for slurry and the band-like base in direction parallel to the front surface of the band-like base and perpendicular to the direction of its movement. Method includes a step of feeding slurry onto band-like body during oscillation of dispensing opening relative to band-like body a in direction, parallel to face surface of band-like body and perpendicular to direction of its movement. Method also includes slurry coating step, on which slurry is applied on surface of band-like body by means of setting and compressing band-like body, on which slurry is applied. Oscillation frequency is based on roll turn pitch, in which band-like body is rolled. Slurry coating method for applying slurry onto moving band-like body includes a step of feeding slurry onto band-like body, performing oscillations relative to dispensing opening in a direction, parallel to face surface of band-like body and perpendicular to direction of its movement. Oscillation frequency of band-like body is set based on roll turn pitch, in which band-like body is rolled.

EFFECT: technical result of group of inventions is enabling elimination of defects in form of folds and higher efficiency when making sheet steel.

33 cl, 23 dwg, 4 tbl

Description

Technical field

The invention relates to a device for applying suspensions and to a method of coating with a suspension, by means of which a suspension is applied to a textured electrical steel sheet, which is an annealing separator designed to prevent coiling of coils during high-temperature annealing of rolled textured electrical steel sheet.

State of the art

Typically, textured sheet steel is mainly used as an iron core material for transformers, electric generators, and other electrical devices. Accordingly, for textured electrical steel sheets, in addition to good magnetic properties (loss in iron), good surface films are required.

The surface film of a steel sheet consists of a ceramic film, such as a forsterite film. In the process of forming a forsterite film on a steel sheet obtained by cold rolling with the required sheet thickness, an oxide film (sublayer scale), which mainly consists of silicon oxide (SiO ₂ ), is formed on it. Further, after applying magnesium oxide (MgO) to the oxide film, the steel sheet is rolled up. Further, in the process of final annealing, heat treatment of a roll of sheet textured electrical steel is performed at a temperature of 1000 ° C or higher. In this case, SiO ₂ and MgO react with each other on the surface of the steel sheet, and a forsterite film (Mg ₂ SiO ₄ film) is formed on the surface. MgO applied to the surface of the steel sheet also serves as an adhesion inhibitor designed to prevent the coiling of the coils from sticking during the final annealing, and is also called an annealing separator. After the final annealing, leveling annealing of the steel sheet is performed to correct its shape and obtain the final product.

Typically, an annealing separator, such as MgO, is suspended in water and converted into a suspension. Then, on the output side of the continuous annealing furnace during decarburization annealing using feed nozzles and crimping rolls, a suspension is applied to both surfaces, the upper surface and the lower surface of the ribbon-like base, to form a film of the required thickness. At this stage, liquid spreading often occurs on the upper side of the ribbon-like base from the inlet side of the crimp rolls. Subsequently, after drying the annealing separator in the drying oven, the ribbon-like base is wound onto a roll.

Typically, as described in Japanese Patent Application No. 2004-057971, the feed nozzles and crimp rolls are arranged so that after the feed nozzles feed the slurry onto the tape substrate, the thickness of the suspension film can be controlled by crimp rolls such as roughing rolls and coating rolls. Depending on the required accuracy of the film thickness or due to the limited space for installation of the equipment, there may be cases in which only one of the rolls for rough coating and the rolls for coating are installed, in which, through the subsequent arrangement of nozzles between the rolls of the rough coating and the coating rolls nozzles and crimping rolls configured to apply slurry through nozzles.

As described in Japanese Patent Application No. S62-067118, there may be cases in which the suspension is fed to the tape base by feeding nozzles after passing the tape base through all the coating rolls. In this case, a certain number of nozzles feeding the suspension is set with an interval of 100 millimeters in width perpendicular to the direction of advancement of the ribbon-like base.

Disclosure of invention

After leveling annealing according to the steel sheet manufacturing process described above, there may be cases in which shape defects in the form of folds parallel to the longitudinal direction of the steel sheet can be observed on a tape-like basis, which is this steel sheet. The tape-like base with areas of these defects cannot be considered as a suitable product and must be discarded. Accordingly, the occurrence of these defects leads to a decrease in productivity in the manufacture of sheet steel. However, the details of the occurrence of the indicated folded shape defect remained unclear, therefore, it was necessary to develop a technology to reduce the occurrence of these shape defects in the form of folds.

Based on the situations discussed above, the object of the invention is to develop a device for applying a suspension and a method of coating with a suspension, which can eliminate the occurrence of shape defects in the form of folds located along the longitudinal direction of supply of the steel sheet and likely to occur after leveling annealing in the production of sheet steel, and can improve sheet metal fabrication performance.

To solve the problem, the device for applying suspension coatings according to the invention applies the suspension to a moving ribbon-like base and contains a suspension dosing unit configured to feed the suspension onto the ribbon-like base, while the device is configured to feed the suspension to the ribbon-like base via a suspension dosing unit when the relative the position of the dosing unit of the suspension and the ribbon-like base in a direction substantially parallel to the front surface of the nticular basis and, essentially, perpendicular to the direction of advancement of the tape-like basis.

In addition, the device for applying suspension coatings contains a pair of coating units made with the possibility of applying the supplied suspension to the surface of the tape base by gripping and compressing the tape base, while the dosage unit of the suspension is configured so as to be able to oscillate relative to the tape base in the direction essentially parallel to the surface of the ribbon-like base and substantially perpendicular to the direction of advancement of the ribbon-like base s.

In addition, the device for applying suspension coatings contains a second suspension dispensing unit configured to supply the suspension to the ribbon-like base, wherein the suspension dispensing unit is located in front of the pair of coating units in the direction of advancement of the ribbon-like base, and the second suspension dispensing unit is located behind the coating coating pair nodes in the direction of advancement of the ribbon-like base.

In addition, in the suspension coating apparatus, the second suspension dispensing unit is configured to oscillate with respect to the ribbon base in a direction substantially parallel to the front surface of the ribbon base and substantially perpendicular to the direction of advancement of the ribbon base.

In addition, the device for applying suspension coatings according to the invention comprises a third suspension dispensing unit configured to supply the suspension to the tape-like base, wherein the suspension dispensing unit is located behind the pair of coating units in the direction of advancement of the tape-like base, and the third suspension dispensing unit is located in front of the couple applying covering nodes in the direction of advancement of the ribbon-like base.

In addition, in the device for applying suspension coatings, the time fluctuations are rectangular, sinusoidal or triangular in shape.

In addition, the device for applying suspension coatings is configured to oscillate with respect to the ribbon-like base.

In addition, in the device for applying suspension coatings, the oscillation frequency of the suspension dosing unit is ensured based on the step of the coil of the roll into which the ribbon-like base is wound.

In addition, in the device for applying suspension coatings, the oscillation frequency of the suspension dosing unit is provided based on the step of the coil of the roll multiplied by an even number.

In addition, the device for applying a suspension coating contains a node for providing vibrations of the ribbon-like base, configured to provide vibrations of the ribbon-like base relative to the dosage unit of the suspension in a direction substantially parallel to the surface of the ribbon-like base and essentially perpendicular to the direction of advancement of the ribbon-like base, and a pair of applying coating nodes made with the possibility of applying the feed slurry to the surface of the ribbon-like base by setting and compressing entovidnoy base.

In addition, the device for applying suspension coatings contains a pair of second coating nodes located behind a pair of coating nodes in the direction of advancement of the ribbon base and configured to deposit the suspension on the surface of the ribbon base by setting and compressing the ribbon base.

In addition, the device for applying suspension coatings contains a second suspension dosing unit, located behind a pair of coating units in the direction of advancement of the ribbon-like base and configured to feed the suspension onto the ribbon-like base.

In addition, in the device for applying suspension coatings, the time fluctuations are rectangular, sinusoidal or triangular in shape.

In addition, in the device for applying suspension coatings, the oscillation frequency of the tape-like base is provided based on the step of the coil of the roll into which the tape-like base is wound.

In addition, in the device for applying suspension coatings, the oscillation frequency of the tape base is provided based on the step of the coil of the roll, multiplied by an even number.

In addition, in accordance with the invention, the suspension coating method allows the suspension to be applied to the tape-like base, the suspension being fed to the tape-like base while changing the relative spatial position of the dispensing outlet for the suspension and the tape-like base in a direction substantially parallel to the front surface of the tape-like base and essentially perpendicular to the direction of advancement of the ribbon-like base.

In addition, the method of coating the suspension includes a step of feeding the suspension, designed to supply the suspension to the tape base while vibrating the dispensing outlet relative to the tape base in a direction substantially parallel to the front surface of the tape base and essentially perpendicular to the direction of advancement of the tape base, as well as a coating step for applying a slurry to the surface of the tape base by setting and compressing the flax the basis of the suspension.

In addition, the method of coating the suspension includes a step of feeding the suspension, designed to supply the suspension to the tape base while vibrating the tape base relative to the dispensing outlet in a direction substantially parallel to the front surface of the tape base and essentially perpendicular to the direction of advancement of the tape base, as well as a suspension coating step for applying the suspension to the surface of the tape base by setting and compressing ntovidnoy basis on which the suspension is supplied.

In addition, the suspension coating method includes a second suspension coating step for applying the suspension to the surface of the ribbon base by setting and compressing the ribbon ribbon onto which the suspension is fed after the suspension coating step.

In addition, the method of coating the suspension includes a second step of feeding the suspension, designed to supply the suspension to the tape base after the step of coating the suspension.

In addition, in the method of coating the suspension with a second suspension, the suspension is fed onto the ribbon-like base while vibrating the metering outlet for the suspension relative to the ribbon-like base in a direction substantially parallel to the front surface of the ribbon-like base and substantially perpendicular to the direction of advancement of the ribbon-like base.

In addition, the method of coating the suspension includes a third supply of the suspension, designed to supply the suspension to the tape base before feeding the suspension, and a second coating of the suspension, designed to apply the suspension to the surface of the ribbon-like base by setting and compressing the ribbon-like base to which the suspension is supplied during the third supply of the suspension .

In addition, in the method of coating with a suspension, the time oscillations are rectangular, sinusoidal or triangular in shape.

In addition, in the method of coating with a suspension, the oscillation frequency is set based on the step of the coil of the roll into which the ribbon-like base is wound.

In addition, in the method of coating with a suspension, the oscillation frequency is set based on the step of the coil of the roll, multiplied by an even number.

In addition, in the suspension coating method, the oscillation frequency of the tape-like base is established based on the step of the coil of the roll into which this tape-like base is wound.

In addition, in the method of coating with a suspension, the oscillation frequency of the tape-like base is established based on the step of the coil of the roll, multiplied by an even number.

A suspension coating device and a suspension coating method according to the invention prevent the formation of wrinkles in the form of folds along the longitudinal direction of the steel sheet and increase the productivity of the steel sheet.

Brief Description of the Drawings

In FIG. 1 shows one example of a configuration of a suspension coating apparatus according to a first embodiment of the invention;

in FIG. 2 shows a standard device for applying suspension coatings, as well as the distribution over the film thickness of the suspension of the annealing separator, which is applied to the surface of the tape-like base;

in FIG. 3A shows a standard roll of a ribbon-like base coated with a suspension of an annealing separator, sectional and perspective view;

in FIG. 3B shows a portion surrounded by a broken line in FIG. 3A, in an enlarged view;

in FIG. 4A is a graph illustrating one example of the control of vibrations of a suspension feed nozzle by a suspension coating apparatus in accordance with a first embodiment of the invention;

in FIG. 4A is a graph illustrating another example of oscillation control of a suspension feed nozzle provided by a suspension coating apparatus in accordance with a first embodiment of the invention;

in FIG. 4C is a graph illustrating yet another example of control of oscillations of a suspension feed nozzle by a suspension coating apparatus in accordance with a first embodiment of the invention;

in FIG. 5 shows a device for applying suspension coatings according to the first embodiment of the invention and the distribution over the film thickness of the suspension of the separator for annealing on the surface of the tape-like base while controlling the nozzle for feeding the suspension in the sinusoidal mode;

in FIG. 6A shows a suspension coating apparatus according to a first embodiment of the invention and a film thickness distribution of a suspension separator for annealing on the surface of the tape-like base while controlling the nozzle for feeding the suspension in a square wave mode;

in FIG. 6B shows a portion of a coiled ribbon-like substrate coated with a suspension of an annealing separator according to a first embodiment of the invention, an enlarged sectional view;

in FIG. 7A shows a suspension coating apparatus according to a first embodiment of the invention and in a first modification;

in FIG. 7B shows a suspension coating device according to a first embodiment of the invention and in a second modification;

in FIG. 7C shows a suspension coating apparatus according to a first embodiment of the invention and a third modification;

in FIG. 8 shows a suspension coating apparatus according to a second embodiment of the invention;

in FIG. 9A is a graph illustrating one example of vibration control of a ribbon base in accordance with a second embodiment of the invention;

in FIG. 9B is a graph illustrating another example of vibration control of a ribbon-like base in accordance with a second embodiment of the invention;

in FIG. 9C is a graph illustrating yet another example of controlling the vibrations of the ribbon base in accordance with a second embodiment of the invention;

in FIG. 10 shows a suspension coating device according to a second embodiment of the invention, as well as a film thickness distribution of a suspension separator for annealing on the surface of the ribbon base while controlling the vibrations of the ribbon base in sinusoidal mode;

in FIG. 11A shows a suspension coating device according to a second embodiment of the invention, as well as a film thickness distribution of a suspension separator for annealing on the surface of the ribbon base while controlling the vibrations of the ribbon base in a square wave mode;

in FIG. 11B shows a portion of a coiled ribbon-like substrate coated with a suspension of an annealing separator according to a second embodiment of the invention, an enlarged sectional view;

in FIG. 12A shows a suspension coating apparatus according to a second embodiment of the invention and in a first modification;

in FIG. 12B shows a suspension coating apparatus according to a second embodiment of the invention and in a second modification;

in FIG. 12C shows a suspension coating apparatus according to a second embodiment of the invention and a third modification.

The implementation of the invention

First Embodiment

As shown in FIG. 1, the suspension coating apparatus 20 according to the first embodiment is a device that applies a suspension 4 of an annealing separator to the surface of a steel sheet and comprises crimp rolls 2 and a nozzle 3 for supplying the suspension. The nozzle 3 for supplying a suspension is a device for dispensing a suspension, containing several feed outlet openings, which supply the suspension 4 of the annealing separator to the tape-like base 1, which is a textured sheet of electrical steel. Compression rolls 2 are a pair of devices for applying materials that compress a suspension 4 of an annealing separator deposited on a tape-like base 1 to a predetermined thickness. Although this will be described in detail below, the suspension nozzle 3 in the first embodiment is configured to oscillate with respect to the ribbon base 1 in a direction substantially parallel to the front surface of the ribbon base 1 and substantially perpendicular to the feed direction of the ribbon base 1 (direction the movement of the ribbon-like base 1), i.e. the width of the ribbon-like base 1.

When applying the suspension 4 of the annealing separator using the suspension coating device 20 configured in this way, after dosing and feeding the feeding nozzle 3, the suspension 4 of the annealing separator onto the surface of the tape base 1, the crimping rolls 2 capture and compress (compress) the tape-like base 1 into direction along its thickness and compress the suspension 4 of the annealing separator deposited on the surface of the ribbon-like base 1 to a film with a given thickness. After that, the tape-like base 1 is subjected to various processing processes, such as the final annealing process (annealing process for secondary recrystallization), the coating process and the leveling annealing process, and ultimately turns into a product - sheet electrical steel.

The inventors investigated wrinkled shape defects that form on the surface of the tape base 1 after leveling annealing using a conventional suspension coating device. As a result, the inventors found that for shape defects there is a definite correlation between the localization of their occurrence along the width of the ribbon-like base 1 and the installation position of the nozzle 3 for feeding the suspension along the width of the ribbon-like base. Then, the inventors focused on the heterogeneity of the film thickness of the suspension 4 of the annealing separator applied across the width of the ribbon-like base 1, and came to the conclusion that this distribution of the film thickness affects shape defects.

In FIG. 2 shows the configuration of a conventional suspension coating device and the film thickness distribution of the suspension 4 of the annealing separator over the width of the tape base 1 after the suspension 4 of the tape separator for annealing 1 was compressed to a predetermined film thickness.

As shown in FIG. 2, when the nozzle 103 for supplying a slurry of a standard suspension coating apparatus 100 delivers a suspension 4 of annealing separator to the surface of the tape base 1, it can be concluded that the film thickness of the suspension 4 of the annealing separator is large at locations near the respective dispensing nozzle outlets 103 for feeding the suspension and small in locations at a distance from them. Thus, the standard suspension coating apparatus 100 controls the distribution of the thickness of the film of the suspension 4 of the annealing separator in the width direction of the tape base 1, as well as the distribution of the film of the suspension 4 of the separator for annealing in thickness along the longitudinal axis of the tape base 1. Therefore, the differences in thickness films of a suspension 4 of an annealing separator on the surface of the ribbon-like base 1 fall within the boundaries of this range. However, even though the differences in the thickness of the film of the suspension 4 of the annealing separator were within the limits of this range, it was not possible to avoid the occurrence of wrinkles in the form described above.

According to the results obtained by the authors of the present invention, the occurrence of the smallest differences in the distribution of the film thickness of the suspension 4 of the annealing separator on the surface of the ribbon base 1, explained by the location of the installation positions of the metering outlets of the nozzle 103 for feeding the suspension, is inevitable. In other words, the uneven deposition of the suspension 4 of the annealing separator formed by the crest sections in which the film thickness is maximum and the depressions in which the film thickness is relatively small refers to the positions of the outlet openings of the suspension nozzle 103 and, thus, can be seen as an inevitable effect.

Therefore, the authors of the present invention performed a thorough study and a more detailed study of the influence of the uneven application of the suspension 4 of the annealing separator on the occurrence of shape defects.

Further, the inventors focused on the fact that when the ribbon-like base 1 coated with a suspension 4 of annealing separator 1 is rolled up, the ridges and troughs of the suspension 4 of the ribbon-forming annealing separator 4 are at the same width positions at any time tape base 1. In FIG. 3A shows a cross-sectional view along the width of a roll 10 of a ribbon-like base 1 coated with a suspension 4 of an annealing separator using a suspension nozzle 103.

As shown in FIG. 3A, when the tape-like base 1 is wound into a roll 10 of the hollow and columnar shape shown in FIG. 3B, the crested portions of the suspension of the annealing separator 4 on the surface of the ribbon base 1 are layerwise wound onto one another in a radial direction represented by a circular cross section relative to the longitudinal axis of the ribbon substrate 1 in the roll 10, and the number of overlays increases, and the suspension 4 of the annealing separator is pushed out ( within the dashed line in Fig. 3B). In this case, it should be borne in mind that these overlays of the crest sections of the suspension 4 of the annealing separator on the surface of the tape base 1 during the final annealing cause the appearance of shape defects in the form of folds of the tape base 1. It should be noted that the positions of the bands due to inhomogeneous deposition, which are visible after the filing of the suspension 4 of the separator for annealing on the surface of the tape-like base 1, and the position of the shape defects formed on the surface of the tape-like base 1, do not necessarily coincide.

Based on the foregoing, the inventors came to the conclusion that instead of completely suppressing the heterogeneity of the distribution of the film thickness of the suspension 4 of the separator for annealing along the width of the tape base 1, which is inevitable, the occurrence of shape defects can be controlled provided that the distribution of the film thickness can be made so as uniform as possible, and while coiling the ribbon-like base 1 can be suppressed.

Accordingly, in the first embodiment, the suspension coating apparatus 20 is used as shown in FIG. 1, a configuration in which a nozzle 3 for supplying a suspension including several outlet openings is made so that it is able to oscillate relative to the tape base 1 in a direction parallel to the front surface of the tape base 1 and perpendicular to the direction of advancement of the tape base 1, i.e. . the width of the tape-shaped base 1. The nozzle 3 for feeding the suspension doses and delivers the suspension 4 of an annealing separator to the surface of the tape-like base 1 and at the same time oscillates relative to the tape-like base 1 in the direction along the width of the tape-like base 1. This makes it possible for the nozzle to be used for feeding the suspension 3 to feed the suspension 4 of the annealing separator onto the tape-shaped base 1 with a change in the time relative position of the dispensing outlet openings of the nozzle and the tape-like base 1 in the direction the width of the ribbon-like base 1.

In FIG. 5 shows a suspension coating apparatus 20 and a graph illustrating the film thickness distribution of the suspension 4 of an annealing separator on the surface of the tape base 1 while controlling the nozzle 3 for supplying the suspension based on the graph of FIG. 4A.

The nozzle 3 for supplying a suspension oscillates along the width of the ribbon-like base 1 in a sinusoidal mode, as shown in FIG. 4A, or oscillates in a triangular mode, as shown in FIG. 4B. Accordingly, as shown in the graph of the film thickness distribution of the suspension 4 of the annealing separator (Fig. 5), the distribution of the film thickness of the suspension 4 of the annealing separator in the width direction of the ribbon substrate 1 is more uniform than the usual case (see Fig. 2) , in which the suspension 4 of the annealing separator is dosed at a fixed position of the nozzle 3 to supply a suspension that cannot oscillate. The oscillation range of the nozzle 3 for supplying the suspension shown in FIG. 5 preferably is substantially half the distance between adjacent dispensing outlets of the nozzle 3 for supplying the slurry. This averages the feed amount of the suspension 4 of the annealing separator in the width direction of the tape base 1 between the dispensing outlets of the nozzle 3 for supplying the suspension.

In addition, the period T indicated in FIG. 4A and 4B, is preferably from 1 to 150 seconds, and more preferably from 2 to 120 seconds. Thus, compared with the non-uniform distribution of the film thickness of the suspension 4 of the annealing separator shown in FIG. 2 according to FIG. 5, the suspension 4 of the annealing separator is neatly applied to the surface of the ribbon-like base 1, forming small crest sections and troughs of the suspension of the 4 annealing separator, which are insignificant in amplitude, thereby reducing differences in the distribution of the film thickness and making the film smooth. Therefore, the occurrence of shape defects on the surface of the ribbon base 1 can be prevented. In fact, in the process of controlling the vibrations of the nozzle 3 for feeding the slurry in the triangular mode, as shown in FIG. 4B, the waveform may be substantially triangular with smoothed rotary end portions due to limitations of the oscillation mechanism, or it may be trapezoidal, since the nozzle 3 for supplying the suspension is suspended for a certain period of time at the rotary end portions. However, these vibrations are also included in triangular vibrations.

In FIG. 6A shows a suspension coating apparatus 20 and a graph illustrating the thickness distribution of the suspension film 4 of an annealing separator on the surface of the tape base 1 for two layers when the vibrations of the nozzle 3 for supplying the suspension are controlled based on the graph shown in FIG. 4C. In FIG. 6B shows the multilayer structure of the roll 10, which corresponds to FIG. 3B, after applying the suspension 4 of an annealing separator to the surface of the tape base 1 in accordance with FIG. 6A and folding the tape base 1 into a roll 10 shown in FIG. 3A.

As shown in FIG. 4C, when the nozzle 3 for supplying a suspension oscillates in the width direction of the ribbon-like base 1 in a rectangular vibration mode, sections of ridges and depressions of the suspension 4 of the annealing separator, as illustrated in the graph of the distribution of film thicknesses in FIG. 6A overlap with each other between two layers of the tape base 1 wound during the folding of the tape base 1 into a roll 10. Here, the oscillation amplitude of the nozzle 3 for supplying the suspension is preferably substantially half the distance between adjacent metering outlets.

In addition, the period T indicated in FIG. 4C is preferably from 1 to 150 seconds, and more preferably from 2 to 120 seconds. This is because when the time dependence on the oscillation amplitude of the nozzle 3 for feeding the slurry is regulated in the square-wave mode, then if the period Τ is less than 1 second, the film thickness of the suspension 4 of the annealing separator is not uniform, as illustrated in FIG. 2. If the period Τ is too important (more than 150 seconds), the displacement value for each turn during the folding of the ribbon-like base 1 into a roll is small and the ridges and troughs of the suspension 4 of the annealing separator do not overlap with each other between the two layers, increasing, thus, the layering shown in FIG. 3. Even when the vibrations of the nozzle 3 for supplying the suspension are controlled in a rectangular mode, the quick displacement of the nozzle in the width direction is difficult, since the speed of the nozzle 3 for feeding the suspension is limited, and thus the actual oscillation is essentially trapezoidal form. However, such vibrations are also included in rectangular vibrations.

Thus, as shown in FIG. 6B, the ridge portions and depressions of the distribution of the film thickness of the suspension 4 of the annealing separator are sequentially layered on each other in the radial direction of the circumference of the cross section and along the longitudinal axis of the ribbon-like base 1 in roll 10, and it is possible to prevent the above-described layering. Thus, the occurrence of shape defects on the surface of the tape-like base 1 can be prevented.

As for the oscillation of the nozzle 3 for supplying a suspension, the implementation of the oscillation of only the nozzle 3 for supplying a suspension is simple. However, the invention is not limited to this. More specifically, it is possible to make the entire suspension coating device 20 that holds the suspension coating nozzle 3 oscillate with respect to the tape base 1 so that the spray nozzle 3 oscillates with respect to the tape base 1, and also that joint vibrations with auxiliary devices such as rolling rolls of the suspension coating apparatus 20.

First Modification of a First Embodiment

As shown in FIG. 7A, the suspension coating apparatus 21 according to the first modification comprises rolls 2a for rough coating, a pair of backup rolls 2b, a pair of rolls 2c for coating, and a pair of nozzles 3a installed before the rolls for roughing. The pair of nozzles 3a that is installed in front of the roughing rolls is a pair of suspension metering units that dispense and feed the suspension 4 of an annealing separator onto both surfaces of the tape base 1. The pair of rolls 2a for roughing are a pair of applicators that coarsely apply the suspension 4 separators for annealing, supplied by a pair of nozzles 3a, located in front of the rollers for rough coating, on both surfaces of the ribbon-like base 1 by squeezing entovidnoy base 1 upon setting the band-shaped base 1 in the direction of its thickness. A pair of coating rolls 2c is a coating device supported by a pair of backup rolls 2b located on both sides of the surface of the ribbon base 1, and compresses the coarse deposited suspension 4 of the annealing separator. In the first modification of the device 21 for applying a suspension coating of a pair of nozzles 3a installed in front of the rollers for applying a rough coating, made with the possibility of vibrations relative to the tape base 1 in the width direction (direction perpendicular to the image in Fig. 7A) of the tape base 1. A pair of nozzles 3a, located in front of the roughing rolls, doses and delivers a suspension 4 of an annealing separator to both surfaces of the ribbon base 1 during vibrations in this direction and. Accordingly, the nozzle 3 for supplying a suspension can feed the suspension 4 of the annealing separator onto the tape-shaped base 1 with a change in the relative position of the dispensing outlet openings of the nozzle and the tape-like base 1 in the width direction of the tape-like base 1.

Second Modification of the First Embodiment

A suspension coating device 22 according to a second modification, as shown in FIG. 7B, comprises nozzles 3a located behind the rolls for roughing the coating in the form of suspension dispensing units, the same as in the first modification of the device 21, or second or third suspension dispensing units, and located in front of the pair of coating rollers 2c in the direction of advancement base 1 nozzle 3b as a slurry dosing unit or as a second or third slurry dosing unit on one side of the surface of the tape base 1. In the device for applying suspension coatings 2 2, at least one of the nozzles 3a installed in front of the rolls for applying the rough coating, and the nozzle 3b installed in front of the rolls for coating, are made to oscillate relative to the tape-like base 1 in the width direction (direction perpendicular to the drawing in Fig. 7B ) ribbon-like base 1. At least one of the nozzles 3a, which is located in front of the rollers for rough coating, and the nozzle 3b, located in front of the rollers for coating, are dosed and a suspension of 4 azdelitelya annealing on both surfaces or one surface of the band-shaped base 1 in the implementation of the oscillation in this direction. Accordingly, at least one of the nozzles 3a installed in front of the rollers for applying the rough coating, and the nozzle 3b installed in front of the rollers for applying the coating, can supply a suspension 4 of an annealing separator to the tape base 1 with a change in the relative position of the metering outlets over time nozzle and ribbon-like base 1 in the width direction of the ribbon-like base 1.

Third Modification of the First Embodiment

A suspension coating device 23 according to a third modification, as shown in FIG. 1C, has the same configuration as the suspension dispensing unit of the suspension coating device 21 in the first modification, and further includes one nozzle 3c located behind the coating rollers as a second suspension dispensing unit located next to the pair of rolls 2c for coating in the direction of advancement of the ribbon-like base 1. In the device for applying suspension coatings 23 in the third modification, at least one of the nozzles 3a installed in front of the rolls for applying rough coating, and the nozzle 3C installed after the rolls for coating are configured so as to allow oscillation relative to the tape-like base 1 in the width direction (direction perpendicular to the drawing in Fig. 7C) of the tape-like base 1. At least one of the nozzles 3a, preceding the rolls for rough coating, and the nozzle 3c, located behind the rolls for coating, dispense and serve a suspension of 4 separator for annealing on both surfaces or on one surface of the tapes prominent base 1 in the implementation of the oscillation in this direction. Accordingly, at least one of the nozzles 3a installed in front of the rolls for applying the rough coating, and the nozzle 3c installed after the rolls for coating, can feed the suspension 4 of the annealing separator onto the tape base 1 with a change in the relative position of the metering outlets over time nozzle and ribbon-like base 1 in the width direction of the ribbon-like base 1.

The following describes examples based on the second modification of the first embodiment of the invention and comparative examples based on standard technology. It should be noted that the invention is not limited to these examples.

Examples 1-30 and comparative example 1

In examples 1-30 and comparative example 1, a cold-rolled textured sheet of electrical steel with a final thickness of 0.3 mm and containing 3.4 wt.% Silicon (Si) is used as the tape-like base 1. After performing decarburization annealing of the tape-like base 1, the suspension 4 of the annealing separator was applied to the tape-like base 1 using the device 22 for applying suspension coatings of the second modification of the first embodiment. More specifically, using nozzles 3a mounted in front of the rolls for applying the rough coating and nozzle 3b mounted in front of the rolls for coating, magnesium oxide (MgO) is applied to both surfaces of the tape base 1 with an annealing separator 4 applied on each surface of the suspension the amount of 7.0 g / m ² . Further, after folding the ribbon-like base 1 into a roll 10, the final annealing is carried out in a roll 10 at a temperature of 1200 ° C. After performing the final annealing in the furnace for leveling annealing, the shape of the ribbon-like base 1 is corrected at a temperature of 850 ° C. Then, a visual inspection of the presence of defects in the shape in the longitudinal direction of the ribbon-like base 1 with the corrected shape is performed.

In examples 1-30, vibrations of at least one of the nozzles 3a installed in front of the rolls for applying the rough coating, and the nozzle 3b installed in front of the rolls for coating, during the application of the suspension 4 of the separator for annealing on the surface of the tape base 1, as follows .

In Examples 1-5, only nozzles 3a mounted in front of the roughing rolls oscillate by controlling the amplitude of oscillation of the nozzles versus time in a sinusoidal mode with reference to FIG. 4A with a period of Τ in 1, 2, 60, 120 and 150 seconds, respectively. In Examples 6-10, only the nozzle 3b installed in front of the finish coating rollers oscillates by controlling the amplitude of the oscillations of the nozzle as a function of time in the sinusoidal mode with reference to FIG. 4A with a period T of 1, 2, 60, 120 and 150 seconds, respectively. In Examples 11-15, only the nozzles 3a installed in front of the rollers for applying the rough coating are oscillated by controlling the amplitude of the oscillations of the nozzles depending on the time in the rectangular oscillation mode shown in FIG. 4 With a period of T at 1, 2, 60, 120 and 150 seconds, respectively. In Examples 16-20, only the nozzle 3b installed in front of the finish coating rollers oscillates by controlling the oscillation amplitude of the nozzle as a function of time in the square wave mode with reference to FIG. 4 With a period of T at 1, 2, 60, 120 and 150 seconds, respectively. In Examples 21-25, only nozzles 3a installed in front of the roughing rollers and nozzle 3b installed in front of the finishing rollers oscillate by controlling the oscillation amplitude of the nozzles as a function of time in sinusoidal mode with reference to FIG. 4A with a period T of 1, 2, 60, 120 and 150 seconds, respectively. In Examples 26-30, only nozzles 3a installed in front of the roughing rollers and nozzle 3b installed in front of the finishing rollers oscillate by controlling the oscillation amplitude of the nozzles as a function of time in the square wave mode shown in FIG. 4 With a period of T at 1, 2, 60, 120 and 150 seconds, respectively. In addition, in comparative example 1, a suspension 4 of an annealing separator is applied to the surface of the tape base 1 in accordance with the standard method, without using vibrations of the nozzles 3a installed in front of the roughing rolls and the nozzle 3b installed in front of the coating rolls. The table shows the results obtained in examples 1-30 and comparative example 1.

From table 1 it can be seen that in examples 1-30 there are generally no manifestations of defects in the shape of a textured sheet of electrical steel, which is a tape-like base 1, or these defects are reduced in comparison with the standard case. On the contrary, in comparative example 1 revealed the presence of defects in shape. Based on the results of comparing examples 1-30 with comparative example 1, it can be said that in examples 1-30, vibrating at least one of the nozzles 3a installed in front of the rolls for applying the rough coating, and the nozzle 3b installed in front of the rolls for applying the coating , relative to the ribbon-like base 1 in the width direction of the ribbon-like base 1 can suppress the occurrence of defects in the shape of the textured sheet of electrical steel.

Based on the results presented in table 1, we can also say that when examples are compared in which shape defects are reduced and examples in which shape defects are absent, defects in a textured sheet of electrical steel do not occur when a suspension of 4 annealing separator is applied in conditions for applying vibrations of at least one of the nozzles 3a installed in front of the rolls for applying the rough coating, and the nozzle 3b installed in front of the rolls for applying the coating, with a period T from 2 to 120 seconds und Therefore, it can be assumed that the period T of the oscillations of the nozzle 3 for feeding the suspension is preferably from 2 to 120 seconds.

Examples 31-36 and comparative example 2

In examples 31-36 and comparative example 2, a cold-rolled textured sheet of electrical steel with a final thickness of 0.23 mm and containing 3.4 wt.% Silicon (Si) is used as the ribbon-like base 1. After decarburizing annealing of the tape-like base 1, the suspension 4 of the annealing separator was applied to the tape-like base 1 using the suspension coating device 22 from the second modification of the first embodiment described above. More specifically, using nozzles 3a installed in front of the rolls for applying the rough coating and nozzle 3b installed in front of the rolls for coating, magnesium oxide (MgO) is applied to both surfaces of the tape base 1 with an annealing separator 4 applied to each surface of the suspension the amount of 7.0 g / m Further, after folding the ribbon-like base 1 into a roll 10, the final annealing is carried out in a roll 10 at a temperature of 1200 ° C. After performing the final annealing in the furnace for leveling annealing, the shape of the ribbon-like base 1 is corrected at a temperature of 850 ° C. Then, a visual inspection of the presence of defects in the shape in the longitudinal direction of the ribbon-like base 1 with the corrected shape is performed.

In examples 31-36 during the application of the suspension 4 of the separator for annealing on the surface of the ribbon-like base 1, the oscillations of the nozzles 3a installed in front of the rollers for applying the rough coating are carried out based on the following technological ideas.

The effect of the invention that the nozzle oscillates to deposit a suspension 4 of annealing separator in the width direction of the steel sheet is to facilitate uniformity of the amount of suspension 4 of the annealing separator applied to the steel sheet by making small variations in the amount of coating from the suspension 4 of the annealing separator that bind with the location of the coating nozzle in the direction along the width of the steel sheet. In addition, it is assumed that due to the folding of the steel sheet into a roll after applying the suspension 4 of the annealing separator, it is more preferable that the combination of the amount of coating on adjacent or adjacent layers of the suspension 4 of the annealing separator on the steel sheet in the radial direction of the coil is uniform.

Based on this, it was concluded that it is preferable to vary the oscillation period of the nozzle for applying a suspension of 4 separators for annealing, taking into account the step of the coil of the steel sheet roll. In the first embodiment, vibrations of the coating nozzle are provided with a period corresponding to a step not from each turn, but to a step from every two turns. The inventors of the present invention have discovered the possibility of further homogenizing the total amount of suspension 4 of the annealing separator used for coating between the layers of the steel sheet in the direction along the width of the steel sheet when it is wound into a roll.

Accordingly, in examples 31-36, the ratio (V / 2L) of the linear velocity V of the ribbon base 1 and the double pitch L of the coil of the roll 10 is defined as the frequency of the pitch of the coil (in Hz), and the linear velocity V and the diameter of the coil 10 are set so that the step frequency of the turn was 0.665 Hz. At this stage, the suspension 4 of the annealing separator was applied to the surface of the ribbon-like base 1, and the oscillation frequency of the nozzles 3a installed in front of the rollers for applying the rough coating varied within the range from 0.010 to 1,000 Hz. In addition, the time-dependent control of the change in the oscillation amplitude of the nozzles 3a installed in front of the rollers for applying the rough coating was carried out in the mode of sinusoidal oscillations. Moreover, in comparative example 2, the suspension 4 of the annealing separator was applied to the surface of the ribbon-like base 1 in accordance with a standard method that does not use oscillations of nozzles 3a installed in front of the rolls for applying a rough coating. Table 2 presents the corresponding results of the consideration of defects in the form in the above examples 31-36 and comparative example 2.

From table 2 it can be seen that in examples 31-36 there are generally no manifestations of defects in the shape of the ribbon-like base 1 (textured sheet of electrical steel) or these defects are reduced in comparison with the standard case. In addition, it can be argued that in examples 31-33, when the oscillation frequency of the nozzles 3a installed in front of the rollers for applying the rough coating, approaches the step frequency of the turn, i.e. becomes equal to or close to 0.665 Hz, shape defects on a ribbon-like basis 1 are not formed. On the contrary, in comparative example 2, we can talk about the formation of shape defects on a ribbon-like basis 1.

While in examples 31-36, the time-dependent control of the oscillation amplitude of the nozzles 3a installed in front of the rollers for applying the rough coating was carried out in the sinusoidal mode, even when the time amplitude was controlled in the square-wave mode or in the mode triangular vibrations, differences in the results of manifestations of defects in the shape of the ribbon-like base 1 were not observed.

In addition, examples 31-36 present the results for a turn step frequency of 0.665 Hz. However, even when the pitch frequency of the coil was different from the frequency of 0.665 Hz, results were obtained similar to those cases when the frequency of the coil was 0.665 Hz, by approximating the oscillation frequency of the nozzles 3a installed in front of the roughing rolls with the frequency of the pitch of the coil.

Moreover, in examples 31-36, the coil pitch was set based on the double pitch of the coil, as described above, and the amplitude control of the vibrations of the nozzles 3a installed in front of the coarse rolls was performed based on this coil pitch. This allowed us to obtain good results, presented in table 2. However, even in the conditions of further development of this idea of coating, more specifically, when the frequency of the step of the turn was set based on the step of the turn multiplied by an even number, and the oscillations of the nozzles 3a installed in front of the application rolls rough coating, set in such a way that they are performed in accordance with a given frequency of the step pitch, the same effect was obtained.

According to the first embodiment described above, it is possible for the nozzle 3 to oscillate to feed the suspension in the width direction of the ribbon base 1 during the application of the suspension 4 of the annealing separator on the surface of the ribbon base 1 using such a nozzle 3 for feeding the suspension. This reduces the heterogeneity of the distribution of the film thickness values of the suspension 4 of the annealing separator in the width direction and can prevent layering even when the tape base is folded into a roll 10. Thus, it is possible to suppress the occurrence of shape defects in the form of folds along the longitudinal axis of the steel sheet, which are likely manifestations in the manufacturing process of sheet steel after performing leveling annealing, and, more specifically, the occurrence of the above-described shape defects on the ribbon-like new 1. As a result, the productivity of the steel sheet manufacturing process can be increased.

Second Embodiment

In the first embodiment described above, it was possible to oscillate the slurry dosing unit, such as the nozzle 3 for feeding the slurry, relative to the tape base 1 in the direction along the width of the tape base 1, so as to feed the suspension 4 of the annealing separator onto the tape base 1 while changing depending on the time of the relative spatial arrangement of the ribbon-like base 1 and the suspension dosing unit in the width direction of the ribbon-like base 1. On the contrary, in the second embodiment the possibility of fluctuations of the ribbon-like base 1 relative to the slurry dosing unit in the widthwise direction of the ribbon-like base 1 with the filing, therefore, of the suspension 4 of the separator for annealing on the ribbon-like base 1 is provided, while the relative spatial arrangement of the ribbon-like base 1 and the suspension dosing unit depending on time width direction of the ribbon-like base 1.

As shown in FIG. 8, the suspension coating apparatus 30 according to the second embodiment applies a suspension 4 of an annealing separator to the surface of the steel sheet and comprises crimping rolls 12 and a nozzle for feeding the suspension 13, as well as conveying rollers 15 to advance the ribbon-like base. The nozzle for supplying the suspension 13 is a suspension dispensing unit comprising several dispensing outlets that supply the suspension of the annealing separator 4 to the tape-like base 1, which is a textured sheet of electrical steel. Compression rolls 12 are a pair of devices for applying material that compress the tape-like base 1 in the direction along its thickness, and also compress the suspension 4 of the separator for annealing on the tape-like basis 1 to a predetermined thickness. Each of the conveying rollers 15 is a conveying device for advancing the tape-like base, having, for example, a columnar shape and configured in such a way as to enable the transportation of the tape-like base 1 by rotation around the central longitudinal axis of the column. While a detailed description is given below, the squeeze rolls 12 and conveyor rollers 15 for advancing the tape base are a device for advancing the tape base, which is configured to oscillate the tape base 1 relative to the suspension dosing unit in a direction substantially parallel the surface of the ribbon-like base 1 and substantially perpendicular to the direction of advancement of the ribbon-like base 1, i.e., in the width direction of the ribbon-like base 1.

When applying the suspension 4 of the annealing separator using the suspension coating device 30 configured in this way, the nozzle 13 for supplying the suspension first doses and delivers the suspension 4 of the annealing separator to the surface of the tape base 1. Then, the crimping rolls 12 seize and compress the tape base 1 in the direction by its thickness, and also compress the suspension 4 of the annealing separator, deposited on the surface of the ribbon-like base 1, to a predetermined thickness. After that, this ribbon-like base 1 passes through various processes, such as the final annealing process (annealing process for secondary recrystallization), the coating process, and the leveling annealing process, and, ultimately, turns into a product - sheet electrical steel.

The inventors investigated the formation of shape defects in the form of folds on the surface of the ribbon-like base 1 after the leveling annealing process was performed, similarly to the first embodiment described above. As a result, the inventors have found that, with regard to shape defects, there is a definite correlation between the localization of their manifestation along the width of the ribbon base 1 and the installation position of the nozzle 13 for feeding the suspension along the width of the ribbon base. Then, the inventors focused on the heterogeneity of the film thickness of the suspension 4 of the annealing separator applied across the width of the ribbon-like base 1, and came to the conclusion that this distribution of the film thickness affects shape defects.

As shown in FIG. 2, when the nozzle 103 for supplying a suspension of a standard suspension coating apparatus 100 delivers a suspension 4 of annealing separator to the surface of the tape base 1, the film thickness of the suspension 4 of the annealing separator is large at locations near the respective dispensing outlets of the nozzle 103 for the suspension and small in locations away from them. Thus, just as established above, the standard suspension coating device 100 controlled the distribution of the thickness of the film of the suspension 4 of the annealing separator in the width direction of the tape base 1, as well as the distribution of the film of the suspension 4 of the separator for annealing in thickness along the longitudinal axis of the tape base 1. Accordingly, differences in the film thickness of the suspension 4 of the separator for annealing on the surface of the ribbon-like base 1 fall within the boundaries of this range. Even when the differences in the thickness of the film of the suspension 4 of the annealing separator turned out to be within the limits of this range, it was impossible to avoid the formation of wrinkles as described above.

According to the research results of the inventors, the non-uniformity of the application of the suspension 4 of the annealing separator, the layer of which consists of ridges, in which the film thickness is relatively large, and depressions, in which the film thickness is relatively small, is associated with the positions of the outlet openings of the suspension nozzle 103 as described previously, and thus can be considered as an inevitable effect.

As a result, the inventors conducted a thorough study and thoroughly investigated the effect of the uneven application of the suspension 4 of the annealing separator on the occurrence of mold defects. As a result, the authors, as in the first version, came to the conclusion that instead of completely suppressing the manifestations of the inhomogeneous distribution of the film thickness of the suspension 4 of the separator for annealing in the direction along the width of the ribbon-like base 1, which is inevitable, the occurrence of shape defects can be controlled when provided that the distribution of the film thickness can be made as uniform as possible, and if possible to suppress the effect of overlap when winding the ribbon-like base 1 into a roll.

Accordingly, as shown in FIG. 8, the suspension coating device 30 according to the second embodiment uses a configuration in which, using the crimping rolls 12 and the transporting rollers 15 to advance the tape base, the belt 1 is vibrated with respect to the nozzle 3 for feeding the suspension in a direction parallel to the front surface of the tape base 1 and perpendicular to the direction of advancement of the tape base 1, that is, in the direction along the width of the tape base 1. In the device thus configured 30 d To apply the suspension coatings, the nozzle 13 for feeding the suspension doses and delivers the suspension 4 of an annealing separator to the surface of the tape-like base 1, which oscillates and moves, while the compression rolls 12 and transporting rollers 15 to advance the tape-like base cause the tape-like base 1 to oscillate relative to the nozzle 13 for feeding the suspension in the direction along the width of the ribbon-like base 1. This allows the nozzle 3 to feed the suspension to feed the suspension 4 of the annealing separator onto the ribbon-like base 1 with a change in time with respect to the relative position of the dispensing outlet openings of the nozzle and the ribbon-like base 1 in the width direction of the ribbon-like base 1.

In FIG. 9A-9C are graphs illustrating examples of changes in the amplitude of oscillations as a function of time in the process of controlling the vibrations of the ribbon base 1 when vibrations of the ribbon base 1 are provided by means of crimping rolls 12 and conveying rollers 15 to advance the ribbon base. In FIG. 10 shows a suspension coating apparatus 30 and a graph depicting the film thickness distribution of a suspension 4 of an annealing separator in the width direction of the ribbon base 1 while controlling vibrations of the ribbon base 1 based on the graph of FIG. 9A.

Crimp rolls 12 and conveyor rollers 15 for advancing the ribbon-like base cause the ribbon-like base 1 to oscillate in sinusoidal mode, as shown in FIG. 9A, in the widthwise direction of the ribbon-like base 1, or force the ribbon-like base 1 to oscillate in a triangular (sawtooth) mode, as shown in FIG. 9B. Accordingly, as is evident from the dashed line and the thick line sections in the graph of the film thickness distribution of the suspension 4 of the annealing separator shown in FIG. 10, the distribution of the film thicknesses of the suspension 4 of the annealing separator in the width direction of the ribbon base 1 is smoother compared to the standard case (see FIG. 2 and the broken line of the graph in FIG. 10), in which the annealing separator suspension 4 is dosed in the conditions of advancement of the ribbon-like base 1 without ensuring its fluctuations. Here, the swing range of the ribbon-like base 1 illustrated in FIG. 10 preferably is substantially half the distance between adjacent dispensing outlets of the nozzle 13 for supplying the slurry. This averages the feed amount of the suspension 4 of the annealing separator in the width direction of the tape base 1 between the dispensing outlets of the nozzle 13 for supplying the suspension.

In addition, the oscillation period Τ of the ribbon-like base 1 shown in FIG. 9A and 9B, is preferably from 1 to 150 seconds, and more preferably from 2 to 120 seconds. Thus, compared with the non-uniform distribution of the film thickness of the suspension 4 of the annealing separator shown in FIG. 2 according to FIG. 10, the suspension 4 of the annealing separator is neatly applied to the surface of the ribbon-like base 1 with the formation of moderate in amplitude crest sections and troughs of the suspension layer 4 of the annealing separator. Thus, the differences in the distribution of the film over the thickness of the suspension 4 of the annealing separator are reduced, and the distribution itself becomes smoother, which as a result avoids the occurrence of shape defects on the surface of the tape base 1. In fact, in the process of controlling the vibrations of the tape base 1 in the triangular mode vibrations as shown in FIG. 9B, the waveform may be substantially triangular with smoothed rotary end portions due to limitations of the oscillation mechanism, or it may be trapezoidal because the tape base 1 is suspended for a certain amount of time at the rotary end portions. However, these vibrations are also included in triangular vibrations.

In FIG. 11A shows a suspension coating apparatus 30 and a graph illustrating the film thickness distribution of the suspension 4 of an annealing separator on the surface of the tape base 1 for two layers when the vibrations of the tape base 1 are controlled based on the graph of FIG. 9C. In FIG. 11B shows the multilayer structure of the roll 10, which corresponds to FIG. 3B, after applying the suspension 4 of the annealing separator to the surface of the tape base 1, in accordance with FIG. 11A, and folding the tape base 1 into a roll 10 shown in FIG. 3A.

As shown in FIG. 9C, when the tape-like base 1 oscillates in the width direction of the tape-like base 1 in a rectangular vibration mode, as shown in the graph of the distribution of film thickness values in FIG. 11A, portions of the ridges and troughs of the suspension 4 of the annealing separator overlap with each other between two layers of the layered ribbon base 1 during folding of the ribbon base 1 into a roll 10. Here, the swing range of the ribbon base 1 is preferably substantially half the distance between adjacent dosing the outlet holes of the nozzle 13 for supplying a suspension.

In addition, the oscillation period л of the ribbon-like base 1 shown in FIG. 9C is preferably from 1 to 150 seconds, and more preferably from 2 to 120 seconds. This is due to the fact that when the dependence of the amplitude of oscillations of the ribbon base 1 on time is controlled in the mode of rectangular vibrations, then if the period Τ is less than 1 second, the film thickness of the suspension 4 of the annealing separator is not uniform, as illustrated in FIG. 2. If the period Τ is too important (more than 150 seconds), the displacement value for each turn during the folding of the ribbon-like base 1 into a roll is small and the ridges and troughs of the suspension 4 of the annealing separator between the two layers do not overlap properly, thereby increasing layering, as shown in FIG. 3B. In fact, when controlling the oscillations of the ribbon-like base 1 in the mode of rectangular vibrations, it is difficult to instantly move the ribbon-like base 1 in the direction along the width of the ribbon-like base 1, since the speed of movement of the ribbon-like base 1 is limited and, therefore, the vibration of the ribbon-like base 1 has essentially a trapezoidal shape. However, such control of vibrations is also included in the vibrations of a rectangular shape.

Thus, as shown in FIG. 11B, the ridge portions and depressions in the distribution of the film thickness of the suspension 4 of the annealing separator are alternately layered in the radial direction of the cross section and along the longitudinal axis of the ribbon-like base 1 in roll 10, it is possible to prevent the above-described layering. Thus, the occurrence of shape defects on the surface of the tape-like base 1 can be prevented.

First Modification of the Second Embodiment

As shown in FIG. 12A, the suspension coating apparatus 31 according to the first modification of the second embodiment comprises rolls 12a for rough coating, a pair of backup rolls 12b, a pair of rolls 12c for coating and a pair of nozzles 13a preceding the rolls for roughing. The pair of nozzles 13a installed in front of the roughing rolls is a pair of slurry dosing units that dispense and feed a suspension 4 of annealing separator onto both surfaces of the tape base 1. The pair of roughing rolls 12a are a pair of applicators that coarsely apply the slurry 4 separators for annealing, supplied by a pair of nozzles 13a, located in front of the rollers for rough coating, on both surfaces of the ribbon-like base 1 by squeezing (compressing) this entovoid base 1 when setting the tape-like base 1 in the direction along its thickness. A pair of coating rolls 12c is a pair of coating devices supported by a pair of backup rolls 12b located on both sides of the surface of the tape base 1, and compresses (compresses) the tape base 1 while setting it in the thickness direction, and also compresses roughly applied Suspension 4 separators for annealing. In the first modification, transporting rollers for advancing the ribbon-like base (not shown) in the device 31 for applying suspension coatings 31, rolls 12a for rough coating and rolls 12c for coating with backup rolls 12b are configured, if necessary, in the form of a unit for providing vibrations of the ribbon-like base 1, capable of to oscillate the ribbon-like base 1 relative to the nozzles 13a installed in front of the rolls for applying the rough coating, in the width direction (direction perpendicular to the line hedgehog in Fig. 12A) of the tape base 1. While the device configured to vibrate the tape base in this way vibrates the tape base 1 relative to the nozzles 13a installed in front of the rolls for applying the rough coating, in the width direction of the tape base 1, the nozzle 13a installed in front of the rolls for applying the rough coating, dispense and feed the suspension 4 of the separator for annealing on both surfaces of the ribbon-like base 1, which oscillates and advances. Accordingly, nozzles 13a mounted in front of the roughing rolls can feed a suspension 4 of annealing separator onto the tape base 1 with time-dependent changes in the relative position of their dispensing outlets and tape base 1 in the width direction of the tape base 1.

The second modification of the second variant embodiment of the invention

As shown in FIG. 12B, the suspension coating device 32 according to the second modification has the same configuration as the suspension coating device 31 in the first modification, but furthermore comprises a nozzle 13b mounted in front of the coating rollers as a second suspension dosing unit one side of the surface of the tape base 1, following the nozzles 13a mounted in front of the rolls for applying the rough coating as a slurry dosing unit, and in front of a pair of rolls 12c for applying coatings along the direction of advancement of the tape base 1. Also, in the first modification, transporting rollers for promoting the tape base (not shown) in the device 32 for applying the suspension coatings, rolls 12a for rough coating and rolls 12a for coating with backup rolls 12b are configured if necessary in the form of a device for providing oscillations of the ribbon-like base 1, capable of oscillating the ribbon-like base 1 relative to the nozzles 13a installed in front of the application rollers ernovogo coating in the width direction (direction perpendicular to the drawing in FIG. 12B) of the tape base 1. While the device configured to provide vibrations of the tape base thus configured vibrates the tape base 1 with respect to the nozzles 13a installed in front of the roughing rolls and the nozzle 13b installed in front of the coating rollers in the direction the width of the tape base 1, the nozzle 13A, installed in front of the rollers for applying the rough coating, dose and serve the suspension 4 of the separator for annealing on both surfaces of the tape base 1, which oscillates and advances. Accordingly, at least one of the nozzles 13a installed in front of the rolls for applying the rough coating, and the nozzle 13b installed in front of the rolls for applying the coating, can feed the suspension 4 of the annealing separator onto the tape base 1 with a change in the relative position of the metering outlet the nozzle and ribbon-like base 1 holes in the width direction of the ribbon-like base 1. Here, similarly to the second modification of the first embodiment, one of the nozzles 13a installed in front of the rolls for applied the rough coating, and the nozzle 13b installed in front of the rolls for coating, can be configured to oscillate as a whole with the crimping rolls, more specifically, only one of the nozzles 13a installed in front of the rolls for applying the rough coating, or nozzle 13b, installed in front of the rollers for coating, can be configured to perform oscillations relative to the ribbon-like base 1.

Third Modification of the Second Embodiment

As shown in FIG. 12C, the suspension coating device 33 according to the third modification has the same configuration as the suspension coating device 31 in the first modification, but also includes a nozzle 13c installed after the coating rolls as a second suspension dosing unit on the other side of the surface of the tape base 1 after a pair of nozzles 13a mounted in front of the rollers for coating along the direction of advancement of the tape base 1. Also in the device 33 for applied suspension coatings transporting rollers for advancing the tape base (not shown), rolls 12a for rough coating and rolls 12c for coating with backup rolls 12b, if necessary, are configured as a device for oscillating the tape base 1, capable of oscillating the tape base 1 relative to nozzles 13a mounted in front of the roughing rolls in the width direction (direction perpendicular to the drawing in FIG. 12C) of the tape base 1. While the device configured to provide vibrations of the tape base thus configured vibrates the tape base 1 relative to the nozzles 13a installed in front of the rolls for applying the rough coating, and the nozzle 13c installed after the rolls for coating, in the direction the width of the tape base 1, the nozzle 13A, installed in front of the rollers for applying the rough coating, dose and serve the suspension 4 of the separator for annealing on both surfaces of the tape base 1, which oscillates and advances. Accordingly, the nozzles 13a installed in front of the rolls for applying the rough coating and the nozzle 13c installed after the rolls for coating can supply the suspension 4 of the annealing separator to the tape base 1 with a change in the relative position of the dispensing nozzle and tape-shaped dispensing openings depending on time 1 in the direction along the width of the ribbon-like base 1. Here, similarly to the second modification of the first embodiment, either one of the nozzles 13a installed in front of the rollers for applying a rough coating the nozzle or nozzle 13c installed after the rolls for coating can be configured to oscillate as a whole with the squeeze rolls, more specifically, only one of the nozzles 13a installed in front of the rollers for applying the rough coating, or the nozzle 13c installed after the rolls for coating, can be configured to oscillate relative to the ribbon-like base 1.

The following describes examples based on the above-described second modification of the second embodiment of the invention and a comparative example based on standard technology. It should be noted that the invention is not limited to these examples.

Examples 37-51 and comparative example 3

In examples 37-51 and comparative example 3, a cold-rolled textured sheet of electrical steel with a final thickness of 0.3 mm and containing 3.4 wt.% Silicon (Si) was used as the tape-like base 1. After decarburization annealing of the tape-like base 1, the suspension 4 of the annealing separator was applied to the tape-like base 1 using the device 32 for applying the suspension coatings of the second modification of the second embodiment described above. More specifically, using nozzles 13a mounted in front of the rolls for applying the rough coating and nozzles 13b installed in front of the rolls for coating, magnesium oxide (MgO) is applied to both surfaces of the tape base 1 with an annealing separator 4 applied to each surface of the suspension the amount of 7.0 g / m ² . Further, after folding the ribbon-like base 1 into a roll 10, the final annealing is carried out in a roll 10 at a temperature of 1200 ° C. After performing the final annealing in the furnace for leveling annealing, the shape of the ribbon-like base 1 is corrected at a temperature of 850 ° C. Then, a visual inspection of the presence of defects in the shape in the longitudinal direction of the ribbon-like base 1 with the corrected shape is performed.

In these examples 37-51, the vibration control of the ribbon base 1 is used during the application of the slurry 4 of the separator for annealing on the surface of the ribbon base 1 in the following manner.

More specifically, in Examples 37-41, the vibration control of the tape base 1 is performed in the sinusoidal mode with reference to FIG. 9A with a period T of 1, 2, 60, 120 and 150 seconds, respectively. In Examples 42-46, vibration control of the tape base 1 is performed in the mode of triangular (sawtooth) oscillations with that indicated in FIG. 9B period T, comprising 1, 2, 60, 120 and 150 seconds, respectively. In Examples 47-51, the vibration control of the tape base 1 is performed in the square wave mode with the indicated in FIG. 9 In the period T, comprising 1, 2, 60, 120 and 150 seconds, respectively. Moreover, in comparative example 3, the suspension 4 of the annealing separator was applied to the surface of the ribbon-like base 1 in accordance with the standard method without oscillation of the ribbon-like base 1. Table 3 presents the results obtained in examples 37-51 and comparative example 3.

From table 3 it can be seen that in examples 37-51 there are generally no manifestations of defects in the shape of the textured sheet of electrical steel, which is the tape-like base 1, or these defects are reduced in comparison with the standard case. On the contrary, in comparative example 3 revealed the presence of defects in shape. Based on the comparison of examples 37-51 with comparative example 3, we can say that, as in examples 37-51, control the vibrations of the tape base 1 in the direction along the width of the tape base 1 through the use of conveyor rollers 15 and crimp rolls designed to advance the tape base 12, as a device for providing oscillations of the tape-like base relative to the suspension dosing unit, can suppress the occurrence of shape defects in textured electrical steel sheets.

Based on the results presented in table 3, it can also be said that when examples are compared in which shape defects are reduced and examples in which shape defects are absent, defects in a textured electrical steel sheet do not occur when a suspension of 4 annealing separator is applied using fluctuations of the ribbon-like base with a period of Τ from 2 to 120 seconds. Therefore, it can be assumed that the period Τ in controlling the vibrations of the ribbon-like base 1 is preferably 2-120 seconds.

Examples 52-57 and comparative example 4

In examples 52-57 and comparative example 4, a cold-rolled textured sheet of electrical steel with a final thickness of 0.23 mm and containing 3.4 wt.% Silicon (Si) is used as the ribbon-like base 1. After decarburization annealing of the tape-like base 1, the suspension 4 of the annealing separator was applied to the tape-like base 1 using the device 32 for applying the suspension coatings of the second modification of the second embodiment described above. More specifically, using nozzles 13a mounted in front of the rolls for applying the rough coating and nozzles 13b installed in front of the rolls for coating, magnesium oxide (MgO) is applied to both surfaces of the tape base 1 with an annealing separator 4 applied to each surface of the suspension the amount of 7.0 g / m Further, after folding the ribbon-like base 1 into a roll 10, the final annealing is carried out in a roll 10 at a temperature of 1200 ° C. After performing the final annealing in the furnace for leveling annealing, the shape of the ribbon-like base 1 is corrected at a temperature of 850 ° C. Then, a visual inspection of the presence of defects in the shape in the longitudinal direction of the ribbon-like base 1 with the corrected shape is performed.

In these examples 52-57, the vibrations of the ribbon base 1 are carried out during the application of the slurry 4 of the separator for annealing on the surface of the ribbon base 1 based on the following technological ideas.

Oscillations of the tape-like base 1 in the direction along the width of the steel sheet, carried out by means of the device for oscillating the tape-like base, ensure that the distribution of the amount of suspension 4 of the annealing separator applied to the tape base 1 is uniform by making small changes to the amount of coating applied from the suspension of the 4 annealing separator, which are caused by the position of the coating nozzle in the width direction of the steel sheet of the tape-like base 1. When folding the tapes For the same substrate 1 after applying the annealing separator slurry 4, it is more preferable to create the same combination of the amount of coating on adjacent or adjacent layers of the annealing separator slurry 4 on a steel sheet in the radial direction of the coil.

Based on this, it was concluded that it is preferable to vary the period of oscillation of the ribbon base 1 taking into account the step of the coil of the roll into which the ribbon base 1 is folded. In the second embodiment of the invention, vibrations of the ribbon base 1 with a period corresponding to the step not from each coil are performed, but a step out of every two turns. The inventors have discovered the possibility of further homogenizing the total amount of suspension 4 of the annealing separator used for coating between the layers of the steel sheet in the direction along the width of the steel sheet when it is wound into a roll.

Accordingly, in examples 52-57, the ratio (V / 2L) of the linear velocity V of the ribbon base 1 and the double step L of the coil of the roll 10 is defined as the frequency of the turns (in Hz), and the linear speed V and the diameter of the coil 10 are set so that the frequency turns was 0.665 Hz. At this stage, the suspension 4 of the annealing separator was applied to the surface of the ribbon-like base 1, and the vibration frequency of the ribbon-like base 1 was varied within the range from 0.010 to 1,000 Hz. In addition, the change in the amplitude of oscillations of the ribbon-like base 1 as a function of time was controlled in the sinusoidal mode. Moreover, in comparative example 4, the suspension 4 of the annealing separator was applied to the surface of the ribbon-like base 1 in accordance with a standard method that does not use vibrations of the ribbon-like base 1. Table 4 presents the corresponding results of inspection of shape defects in the above examples 52-57 and comparative example 4.

From table 4 it can be seen that in examples 52-57 there are no manifestations of defects in the shape of the ribbon-like base 1 (a textured sheet of electrical steel) or these defects are reduced compared to the standard case. In addition, it can be assumed that when in examples 52-54 the oscillation frequency of the ribbon-like base 1 approaches the frequency of the turns, i.e. becomes equal to or about 0.665 Hz, shape defects on a ribbon-like basis 1 are not formed. On the contrary, in comparative example 4, we can talk about the formation of shape defects on a ribbon-like basis 1.

Despite the fact that in examples 52-57, the vibration amplitude of the ribbon-like base 1 was controlled as a function of time in the sinusoidal mode, even if the amplitude of the vibration as a function of time was controlled in the square-wave mode or in the triangular mode, differences in the results of manifestations of defects the shape of the ribbon-like base 1 was not observed.

In examples 52-57, the results are presented for a turn step frequency of 0.665 Hz. However, even with a difference in the frequency of the step pitch from a frequency of 0.665 Hz, results were obtained that are similar to the results for cases where the frequency of the turn was 0.665 Hz, by bringing the oscillation frequency of the ribbon-like base 1 closer to the step frequency of the turn.

Moreover, in examples 52-57, the turn step frequency was set based on the double turn of the turn, as described above, and the amplitude control of the vibrations of the tape base 1 was performed based on this turn step frequency. This allowed us to obtain good results, presented in table 4. However, even in the conditions of the further development of this idea of coating, more specifically, when the frequency of the step of the turn was established on the basis of the step of the turn multiplied by an even number, and the oscillations of the tape-like base 1 were set so that they were performed in accordance with a given frequency of the step of the turn, the same effect was obtained.

According to a second embodiment of the invention, it is possible to oscillate the ribbon-like base 1 in the width direction of the ribbon-like base 1 using transport rollers 15 and crimp rollers 12 intended to advance the ribbon-like base during the application of the suspension 4 of the annealing separator on the surface of the ribbon-like base 1. This reduces the heterogeneity of the distribution of the film thickness values of the suspension 4 of the annealing separator in the width direction and can prevent the layering of sales e when folding the ribbon-like base 1 into a roll of 10. Thus, it is possible to suppress the occurrence of shape defects in the form of folds along the longitudinal axis of the steel sheet, which are likely to occur during the production of sheet steel after leveling annealing, and, more specifically, the occurrence of the above defects in the shape of a tape-like basis 1. As a result, the productivity of the steel sheet production process can be increased.

While the first and second embodiments of the invention have been described in detail above, the invention should not be limited to them, and on the basis of technical ideas, the invention can be modified. For example, the numerical values given in the first and second embodiments of the invention are examples and may be changed if necessary.

In addition, in the first embodiment, the period Τ during the control of the nozzle 3 for feeding the suspension in the mode of sinusoidal oscillations or square waves is set from 2 to 120 seconds, and the oscillation frequency of the coating nozzle is set as a predetermined value (for example, 0.665 Hz) corresponding to the step coil of roll 10. However, this period and frequency may vary depending on the linear speed of the tape base 1 and the position of the roll 10 after winding.

In addition, in the second embodiment, it is possible to perform oscillations of the ribbon-like base 1 using transporting rollers 15 to advance the ribbon-like base. However, the oscillations of the ribbon-like base 1 can be achieved without using transporting rollers 15 to advance the ribbon-like basis - with the help of a pressure roller and a tensioner roller located on the inlet and outlet sides of the annealing separator coating device, such as a suspension coating coating device.

In addition, in the second embodiment, the period Τ during the control of the oscillations of the ribbon-like base 1 in the mode of sinusoidal, triangular or rectangular vibrations is set equal to from 2 to 120 seconds and the specified frequency of vibration of the ribbon-like base 1 (for example, 0.665 Hz) is set in accordance with the step turn of the roll 10. However, these values of the period and frequency may vary to other depending on the linear speed of the ribbon-like base 1 and the position of the roll 10 after winding.

In the second embodiment, the situation of the fixed position of the nozzle 13 for feeding the suspension was illustrated. However, the nozzle 13 for supplying the suspension can also be configured so as to perform oscillations in combination with the vibrations of the tape base 1.

Industrial applicability

According to the above, a suspension coating apparatus and a suspension coating method according to the present invention are useful for applying a suspension, such as an annealing separator, to a surface of a steel sheet, and are particularly suitable for eliminating defects in the shape of a steel sheet and increasing the productivity of steel production sheet.

List of Reference Items

1 - Ribbon base.

2, 12 - Crimp rolls.

2a, 12a - Rolls for applying a rough coating.

2b, 12b - Support rolls.

2s, 12s - Rolls for coating.

3, 13 - Nozzle for supplying a suspension.

3a, 13a - nozzles installed in front of the rollers for applying a rough coating.

3b, 13b — Nozzle mounted in front of the coating rolls.

3s, 13s - Nozzle installed after the rolls for coating.

4 - Suspension separator for annealing.

10 - Roll.

15 - Transporting rollers to advance the ribbon-like base.

20, 21, 22, 23, 30, 31, 32, 33, 100 - Device for applying suspension coatings.

Claims (33)

1. A device for applying a suspension coating to a moving ribbon-like base, comprising a metering unit configured to feed the suspension to the ribbon-like base, and a pair of coating units configured to apply the feed suspension to the surface of the ribbon-like base by gripping and compressing the ribbon-like base, this dosage unit is configured to feed the suspension when changing the relative position of the dosage unit and the ribbon-like base in the direction essentially parallel to the front surface of the ribbon-like base and essentially perpendicular to the direction of its movement, the metering unit is also configured to oscillate relative to the ribbon-like base in a direction substantially parallel to the surface of the ribbon-like base and essentially perpendicular to the feed direction of the ribbon-like base, and the frequency oscillations of the dosing unit is installed based on the step of the coil of the roll into which the ribbon-like base is wound. 2. The device according to p. 1, characterized in that the dosing unit is located along the ribbon-like base in front of a pair of coating units, and the device further comprises a second dosing unit configured to feed the suspension onto the ribbon-like base and located along the ribbon-like base after the pair knots for coating. 3. The device according to claim 2, characterized in that the second dosing unit is arranged to oscillate with respect to the ribbon-like base in a direction substantially parallel to the surface of the ribbon-like base and substantially perpendicular to the direction of its movement. 4. The device according to claim 1, characterized in that the dosing unit is located along the ribbon-like base after a pair of coating units, and the device further comprises a third dosing unit configured to feed the suspension onto the ribbon-like base and located along the ribbon-like base in front of the pair knots for coating. 5. The device according to any one of paragraphs. 1-4, characterized in that the oscillations in time have a rectangular, sinusoidal or triangular shape. 6. The device according to any one of paragraphs. 1-4, characterized in that said device carrying a dosing unit is configured to oscillate with respect to the tape-like base. 7. The device according to p. 5, characterized in that said device carrying a dosing unit is configured to oscillate with respect to the tape-like basis. 8. The device according to any one of paragraphs. 1-4, in which the oscillation frequency of the dosing unit is set based on the step of the coil, multiplied by an even number. 9. The device according to claim 5, in which the oscillation frequency of the dosing unit is set based on the step of the coil, multiplied by an even number. 10. The device according to claim 6, in which the oscillation frequency of the dosing unit is set based on the step of the coil, multiplied by an even number. 11. The device according to claim 7, in which the oscillation frequency of the dosing unit is set based on the step of the coil, multiplied by an even number. 12. A device for applying a suspension coating to a moving tape-like base, comprising a dosing unit configured to feed the suspension to the tape-like base, a swing unit of the tape-like base, allowing the tape-like base to oscillate relative to the dispensing unit in a direction substantially parallel to the front surface of the tape-like base and essentially perpendicular to the direction of its supply, and a pair of nodes for coating, made with the possibility of applying the feed suspension the surface of the tape-like base by gripping and compressing it, while the dosing unit is configured to feed the suspension by changing the relative position of the dosing unit and the tape-like base in a direction substantially parallel to the front surface of the tape-like base and essentially perpendicular to the direction of its movement, and the frequency the oscillations of the ribbon-like base is set depending on the step of the coil of the roll into which the ribbon-like base is wound. 13. The device according to p. 12, characterized in that it further comprises a pair of second coating nodes located along the ribbon-like base after a pair of coating nodes and configured to deposit a suspension on the surface of the ribbon-like base by gripping and compressing it. 14. The device according to any one of paragraphs. 12 or 13, characterized in that it further comprises a second dispensing unit located along the ribbon-like base after a pair of coating units and configured to supply a suspension to the ribbon-like base. 15. The device according to any one of paragraphs. 12 or 13, characterized in that the oscillations of the ribbon-like basis in time have a rectangular, sinusoidal or triangular shape. 16. The device according to p. 14, characterized in that the oscillations of the ribbon-like basis in time have a rectangular, sinusoidal or triangular shape. 17. The device according to any one of paragraphs. 12 or 13, in which the frequency of oscillation of the ribbon-like basis is set based on the step of the turn, multiplied by an even number. 18. The device according to p. 14, in which the oscillation frequency of the ribbon-like basis is set based on the step of the coil, multiplied by an even number. 19. The device according to p. 15, in which the frequency of oscillation of the ribbon-like basis is set based on the step of the coil, multiplied by an even number. 20. The device according to p. 16, in which the oscillation frequency of the ribbon-like basis is set based on the step of the coil, multiplied by an even number. 21. A method of applying a suspension coating to a moving ribbon-like base, in which the suspension is fed to the ribbon-like base by changing the relative location of the dispensing outlet for the suspension and the ribbon-like base in a direction substantially parallel to the front surface of the ribbon-like base and substantially perpendicular to its direction of movement wherein the method includes the step of supplying the suspension to the tape-like base when the metering outlet is oscillated relative to the tape-like base in eg an application essentially parallel to the front surface of the ribbon-like base and substantially perpendicular to the direction of its movement, and the step of coating with a suspension, on which the suspension is applied to the surface of the ribbon-like base by setting and compressing the ribbon-like base onto which the suspension is supplied, the vibration frequency being set to the basis of the step of the coil of the roll into which the ribbon-like base is wound. 22. The method according to p. 21, further comprising a second step of supplying the suspension to the tape base after the step of coating the suspension. 23. The method according to p. 22, in which at the second stage of supplying the suspension, it is supplied to the tape-shaped base by oscillating the dispensing outlet for the suspension relative to the tape-shaped base in a direction substantially parallel to the front surface of the tape-shaped base and essentially perpendicular to its direction of movement . 24. The method according to p. 21, further comprising a third step of supplying the suspension to the tape-like base before the step of coating the suspension and a second step of coating the suspension with a suspension on the surface of the tape-like base by setting and compressing the tape-like base to which the suspension is applied on the third stage of filing. 25. The method according to any one of paragraphs. 21-24, in which the oscillations in time have a rectangular, sinusoidal or triangular shape. 26. The method according to any one of paragraphs. 21-24, in which the oscillation frequency is set based on the step of the turn, multiplied by an even number. 27. The method according to p. 25, in which the oscillation frequency is set based on the step of the coil, multiplied by an even number. 28. A method of applying a suspension coating to a moving ribbon-like base, in which the suspension is fed to the ribbon-like base by changing the relative location of the metering outlet for the suspension and the ribbon-like base in a direction substantially parallel to the front surface of the ribbon-like base and substantially perpendicular to its direction of movement wherein the method includes the step of feeding the suspension onto a tape-like base oscillating with respect to the dispensing outlet in the direction essentially parallel to the front surface of the ribbon-like base and essentially perpendicular to the direction of its movement, and the step of coating with a suspension on which the suspension is applied to the surface of the ribbon-like base by setting and compressing the ribbon-like base to which the suspension is supplied, and the vibration frequency of the ribbon-like base is established based on step of the coil of the roll into which the ribbon-like base is wound. 29. The method of claim 28, further comprising a second suspension coating step, wherein the suspension is applied to the surface of the ribbon base by setting and compressing the ribbon base onto which the suspension is fed after the suspension coating step. 30. The method according to p. 29, further comprising a second step of supplying the suspension to the ribbon-like base after the step of coating the suspension. 31. The method according to any one of paragraphs. 28-30, in which the oscillations of the ribbon-like basis in time have a rectangular, sinusoidal or triangular shape. 32. The method according to any one of paragraphs. 28-30, in which the frequency of oscillation of the ribbon-like basis is set based on the step of the coil, multiplied by an even number. 33. The method according to p. 31, in which the oscillation frequency of the ribbon-like basis is set based on the step of the coil, multiplied by an even number.

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