JP3011389B2 - Gravure offset printing press for steel strip - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for printing resist on a steel strip by forming a printed film portion and a non-printed portion, thereafter etching the non-printed portion of the steel strip, and finally peeling off the resist printed film. The present invention relates to a gravure offset printing press for steel strips in which the added value of the steel strip is enhanced.

[0002]

2. Description of the Related Art In order to increase the added value of a steel strip, a resist film is printed on the steel strip using a gravure offset printing machine, a non-printed portion is etched by electrolytic etching or the like, and then the resist film is peeled off. It is generally done. When printing such a resist film on a steel strip, it is printed over the entire width of the steel strip using a gravure roll wider than the width of the steel strip. Thereby, even if the width of the steel strip changes, printing can be performed over the entire width of the steel strip without replacing the gravure roll.

For example, in the case of a silicon steel strip, as shown in FIG. 5, grooves 4a extending in the width direction of the steel strip 4 are continuously engraved in the longitudinal direction so that magnetic domains of the steel strip 4 are subdivided to form a surface layer. Attempts have been made to suppress eddy currents and reduce iron loss. As a means for providing grooves to such a silicon steel strip, first, a gravure offset printing machine is used to continuously print a resist print film in the longitudinal direction on portions other than the groove 4a facing the width direction of the steel strip 4. .

A gravure offset printing press applies ink in an ink pan 5 to a surface of a gravure roll 1 provided on a plurality of outer circumferential surfaces in grooves formed in the widthwise direction as shown in FIG. Excess ink is scraped off with a blade 6, ink is further adhered to an offset roll 2 in contact with the gravure roll 1, the ink is transferred to a steel strip 4, and the ink remaining on the offset roll 2 is removed by a doctor blade 7 for an offset roll. Clean off by scraping off. The ink film adhering to the surface of the offset roll 2 is transferred as a resist film having a groove directed in the width direction to the steel strip 4 wound around the backup roll 3 and passed therethrough.

[0005] As shown in FIGS. 5 and 6, the steel strip 4 on which the resist film 4b having the groove 4a oriented in the width direction is printed is then subjected to non-printing of the groove 4a without the resist film 4b by electrolytic etching. By etching the portion, the groove 4 extending in the width direction is formed on the surface of the steel strip 4 as shown in FIG.
c. Subsequently, the resist film 4b printed on the surface of the steel strip 4 is peeled off to form grooves 4c extending in the width direction on the surface of the steel strip 4 continuously in the longitudinal direction as shown in FIG.

When the groove 4c is provided in the entire width of the steel strip, the following problems occur. Problem: That is, since the etching is performed over the entire width of the steel strip and the edge of the steel strip is also etched, the thickness of the non-printed part of the edge part is reduced by etching,
The tensile stress due to the tension of the steel strip is concentrated here, and the plate is easily broken.

On the other hand, the following countermeasures have conventionally been taken. (1) "Edge mask" for electrolytic etching cells
Is used to prevent the edge portion from being etched. However, the "edge mask" apparatus has the following problems. a. Expensive. b. The "edge mask device" is also easily corroded because it comes into contact with the etching solution.
c. Since there is a movable part in the liquid, liquid leakage easily occurs between the liquid and a driving device outside the liquid. d. Since the "edge mask" is inserted between the electrodes, the electrode spacing is widened and the power cost is high.

(2) The width of the gravure roll is made narrower by 5 mm at both edges than the width of the plate, and the gravure roll is replaced according to the width of the plate. However, this method of replacing gravure rolls takes about three hours at a time, and causes problems such as a reduction in efficiency due to line stoppage and a reduction in yield due to the formation of non-printed portions. (3) Japanese Patent Application Laid-Open No. 4-160115 discloses a proposal that leaves a side edge in local heating for magnetic domain segmentation. However, this is a countermeasure in an electron beam irradiation device, and it is basically impossible to apply this device directly to a gravure offset printing machine.

(4) Further, in the coating machine, the
There is a publication of -207863. However, this means transfers the picked-up paint on the coater roll onto a wiper roll provided in parallel with the coater roll prior to application,
Next, the paint transferred on the wiper roll is removed. Therefore, the thickness of the coating film at the edge of the steel strip is thin or uncoated. When etching is performed in this state, the edge of the steel strip is rather easily etched, and the edge is easily broken. Conversely, in order to prevent the plate from breaking, it is necessary to increase the thickness of the edge portion, which has the opposite effect.

[0010]

SUMMARY OF THE INVENTION The present invention has been made with the above circumstances in mind, and does not use a problematic "edge mask device", and also allows the gravure roll to have the width of a steel strip. It is an object of the present invention to provide a gravure offset printing press for steel strips that can be prevented from breaking at the edge of the steel strip without being replaced according to the above.

[0011]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention provides a method of manufacturing a continuously running steel strip by using a gravure roll, an offset roll and a backup roll from a printed film portion and a non-printed film portion. In a gravure offset printing press designed to perform resist printing, a gravure roll, offset roll, and backup roll wider than the width of the steel strip are used, and a steel strip edge on the backup roll or a steel strip edge on the offset roll is used. A gravure offset printing press for steel strips, wherein a crushing roll for crushing a printed film part of resist printing to a non-printed part and covering the entire surface of the steel strip edge with a resist film is installed in a part. .

[0012]

In the present invention, a gravure roll wider than the width of the steel strip,
Using an offset roll and a backup roll, resist printing is once performed on the entire width of the steel strip. Thereafter, the resist print film at the steel strip edge portion on the backup roll or at the portion corresponding to the steel strip edge of the offset roll is crushed using a roll, and the entire surface of the steel strip edge is covered with the resist film. Therefore, the subsequent electrolytic etching
It acts only on the non-printed portion except the edge portion of the steel strip and the resist print film portion, and the edge portion of the steel strip is not etched. For this reason, the thickness of the steel strip edge portion is maintained as it is, and the tensile stress due to the tension of the steel strip can be prevented from being concentrated on the edge portion. As a result, it is possible to reduce the occurrence of troubles such as plate breakage starting from the edge of the steel strip.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a silicon steel strip will be described below with reference to the drawings. As shown in FIG. 3, the gravure offset printing press is the same as that described with reference to FIG. 4, and therefore, the same devices are denoted by the same reference characters and description thereof will not be repeated. In the present invention, a gravure roll 1, an offset roll 2, and a backup roll 3 wider than the width of a silicon steel strip (hereinafter simply referred to as a steel strip) 4 in FIG.
Is used, printing is performed over the entire width of the steel strip 4 by a resist printing film portion having a resist film and a non-printing portion having no resist film.

The non-printed portion is also covered with the resist film by crushing the resist film by crushing the edge portion of the steel strip 4 wound and passed on the backup roll 3 and contacting the roll 8. It is. For example, referring to FIG. 6, the resist film 4b is crushed at the edge of the steel strip 4 by the crushing roll 8, and the groove 4a is formed.
Is covered with a resist film 4b.

In the present invention, instead of the crushing roll 8 being brought into contact with the edge of the steel strip 4 wound on the backup roll 3, as shown in FIG.
The crushing roll 9 may be installed at a portion corresponding to the steel strip edge. In this case, the resist film of the offset roll 2 is crushed by the crushing roll 9 at a portion corresponding to the steel strip edge, and the entire surface of the portion corresponding to the steel strip edge is covered with the resist film. For this reason, a resist film without a non-printed portion is transferred from the offset roll 2 to the edge of the steel strip 1 on the backup roll 3, and the entire edge of the steel strip is covered with the resist film. The width of the edge is preferably 5 to 20 mm in order to prevent the plate from being broken due to the concentration of tensile stress at the edge of the steel strip. The reason for this is that if it is less than 5 mm, the effect of preventing the plate from breaking against stress concentration is small, and if it exceeds 20 mm, yield loss is caused.

FIGS. 1 and 2 show a backup roll 3
A specific device is shown in the case where a roll 8 is placed in contact with an edge portion of a steel strip 4 wound on the roll and placed. FIG.
As shown in FIG. 2 and FIG. 2, on the supporting frame 11, moving motors 12 are respectively installed on both sides in the width direction so as to correspond to both edges of the steel strip 4, and are connected to the respective moving motors 12. The moving screw 13 is connected to the moving cart 15 via a bearing 23. The moving cart 15 is installed so as to be able to move back and forth along a moving rail 14 laid on the support frame 11.

A driving motor is provided on the support 21 of the moving cart 15.
A pulley 22 attached to a rotating shaft 16a of a driving motor 16 and a pulley 19a attached to a fulcrum shaft 19 supported by a bearing 23 provided on a movable carriage 15 are provided with a driving The timing belt 17a is stretched. Furthermore, a pivot 18 is attached to the tip of the arm 20 so that the pivot 18 can be pivoted around the pivot 19.
The crushing roll 8 is provided through the
a and a drive timing belt 17b
Is hanged over. The drive cylinder 10 is disposed between the support 21 and the arm 20.

Next, the operation of the present invention will be described. When the driving motor 12 is driven and the moving screw 13 is rotated, the moving carriage 15 is moved via the bearing 23, whereby the positions of the crushing rolls 8 on both sides are first respectively aligned with the edges of the steel strip 4. I do. Subsequently, the drive cylinder 10 is driven to rotate the arm 20 with the fulcrum shaft 19 as a fulcrum, and the crushing roll 8 is adjusted to such a degree that the roll 8 is lightly brought into contact with the steel strip 4 that is wound on the backup roll 3 and transferred. .

The gravure roll 1, offset roll 2 and backup roll 3 are driven to rotate in the direction of the arrow, and the ink in the ink pan 5 is wound around the backup roll 3 via the gravure roll 1 and offset roll 2 and passed through the steel plate. A groove extending in the width direction is continuously formed in the longitudinal direction over the entire width of the band 4 to form a resist print film.

At the same time, the driving motor 16 is driven to rotate the crushing roll 8 in the direction of the arrow through the pulley 22, the timing belt 17a, the pulley 19a, the timing belt 17a and the pulley 18a. As a result, the resist print film formed on the edge of the steel strip 4 is crushed to refill the groove, and the entire edge is covered with the resist film. At the edge of the steel strip 4 on the backup roll 3, since the peripheral speed of the crushing roll 8 is different from the moving speed of the steel strip 4, the resist film on the steel strip 4 is flattened by the crushing, and the non-printed portion is eliminated. As a result, the steel strip edge is not etched when the electrolytic etching is performed in the next step. Therefore, no groove is formed in the edge portion, and it is possible to prevent the plate from breaking from the edge portion. Conventionally, in the etching material for silicon steel strip, plate breakage occurred 2 to 5 times a month, but according to the gravure offset printing machine of the present invention, plate breakage due to an edge portion can be completely prevented. .

When the crushing roll 9 is installed at a portion corresponding to the steel strip edge on the offset roll 2, the position of the stretching roll 9 is adjusted by using a moving device similar to the moving device shown in FIGS. be able to. In the above embodiment, the case where a number of grooves oriented in the width direction are provided in the longitudinal direction on the surface of the silicon steel strip was described, but the present invention is not limited to this, and a resist film is printed on various steel strips using a gravure offset printing machine. It goes without saying that it can be applied to

[0022]

As described above, according to the present invention, it is possible to use a gravure roll, an offset roll and a backup roll which are wider than the width of the steel strip, so that it is necessary to change the roll according to the width of the steel strip. In addition, it is possible to save time for changing rolls.

After printing is performed once to form a resist film over the entire width of the steel strip, the resist print film at the edge of the steel strip is crushed toward the non-printed portion by a crushing roll, and the entire edge is covered with the resist film. I do. As a result, when the etching process is performed, the steel strip edge is not etched, and the thickness of the steel strip is not reduced.

[Brief description of the drawings]

FIG. 1 is a side view showing an apparatus according to an embodiment of the present invention.

FIG. 2 is a concave view taken along the line AA of FIG.

FIG. 3 is a schematic side view showing an arrangement of crushing rolls in the gravure offset printing apparatus for steel strip of the present invention.

FIG. 4 is a schematic side view showing a conventional gravure offset printing apparatus for steel strip.

FIG. 5 is a plan view showing a state where a resist print film having a groove directed in the width direction of the silicon steel strip is printed.

FIG. 6 is a sectional view taken along the line AA of FIG. 5;

FIG. 7 is a front view showing a state in which a groove is formed on the surface of the steel strip by etching after a resist print film having a groove oriented in the width direction of the silicon steel strip is formed.

FIG. 8 is a front view showing a state where a groove is formed on the surface of the silicon steel strip and then the resist film is peeled off.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 gravure roll 2 offset roll 3 backup roll 4 steel strip 5 ink pan 6 gravure roll doctor blade 7 offset roll doctor blade 8 crushing roll (backup roll) 9 crushing roll (offset roll) 10 driving cylinder 11 support frame 12 Moving motor 13 Moving screw 14 Moving rail 15 Moving trolley 16 Drive motor 17 Driving timing belt 18 Axis 19 Support shaft 20 Arm 21 Support base 22 Pulley 23 Bearing

Claims (1)

(57) [Claims] 1. A gravure / offset printing machine in which a gravure roll, an offset roll and a backup roll are used to perform resist printing on a continuously running steel strip using a gravure roll, an offset roll and a backup roll. Use a gravure roll, offset roll, and backup roll wider than the width of the steel strip, and press the printed film part of the resist printing to the non-printed part on the steel strip edge on the backup roll or the equivalent part of the steel strip edge on the offset roll. A gravure offset printing press for steel strips, comprising a crushing roll for crushing and covering the entire surface of the steel strip edge with a resist film.