JPH11347474A - Coating nozzle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the long-time stop of a coating line and to improve operability by providing a slit nozzle body with a recessed block member and flat plate block member so as to face each other across a slit opening, making the recessed block member and the flat plate block member openable and closable and coupling both members with hinge members. SOLUTION: A slit nozzle body 1 consists of a recessed block member 2 of a prescribed length which is supported by a supporting structure and a flat plate block member 4 which is coupled to the recessed block member 2 on the upper part side by means of a plurality of hinge members 3. The hinge members 3 are coupled on one side to the recessed block member 2 by means of bolts 5a and are coupled on the other side to the flat plate block member 4 by means of bolts 5b. As a result, both block members 2 and 4 may be put into an open state on site without separating the members by opening the flat plate block member 4 upward around the hinge members 3 on the recessed block member 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slit-shaped coating nozzle for forming a coating film by continuously flowing a coating liquid onto a surface of a material such as a steel strip running continuously.

[0002]

2. Description of the Related Art FIG. 7 shows the structure of a coating nozzle of this type known in the art. In FIG. 7, reference numeral 51 denotes a slit-type coating nozzle main body (hereinafter, referred to as a slit nozzle main body). Slit nozzle body 51
Is a concave block 52 having a recess formed on the inner surface, a substantially flat block 54 fixed to the concave block 52 with bolts 53, and a bolt 53 together with a small gap inside the flat block 54. It is composed of a fixed thin plate lip 55 and a slit width adjusting screw 56.
Further, reference numeral 57 denotes a slit opening formed by the tip of the concave block 52 and the tip of the flat plate lip 55 facing the same, 58 denotes a coating material such as a steel strip which moves below the slit opening via a backup roll 59, and 60 denotes a coating nozzle. Is a coating liquid applied to the upper surface of the entire width of the coating material 58 through the slit opening 57 of FIG.

Further, the slit width adjusting screw 56 generally has a screw shaft 62 provided with a fine pitch screw whose end is fixedly held by a lock pin 61 or the like on the back surface of the flat plate lip 55 and a screw shaft 62 at the center. The flat block 5 is formed by forming a pitch screw larger than the screw shaft 62 on the outer surface.
Center hole type double screw 63 screwed into the screw hole 4
It is composed of By screwing or unscrewing this double screw 63, the screw shaft 62 is pushed or pulled at a fine pitch, and the slit opening width is finely adjusted.

[0004]

However, the above-mentioned slit nozzle body 51 has the following problems. (1) The coating nozzle is operated continuously while adjusting the coating film thickness. For this reason, it is necessary to periodically polish the inner surface of the nozzle or to clean the inner surface of the nozzle when the operation of the line is stopped. At the time of cleaning and polishing, the slit nozzle body 51 is removed from the mounting position and moved to the cleaning place, where the bolt 53 is removed, and the concave block 52, the flat block 54, and the flat lip 55 are disassembled and separated, and the inner surface is removed. It must be cleaned or polished and reassembled. At this time, the length of the slit nozzle body 51 is
In the case of the wide material 58 to be coated, which exceeds 2 m and has a large weight, it takes a long time to remove, disassemble, assemble, and attach the coating material 58. The line will be stopped for a long time,
There is a problem that operability is deteriorated.

(2) When cleaning the nozzle, the entirety of the concave block 52 and the flat plate lip 55 of the nozzle body is polished, so that replacement of the nozzle requires an entire replacement spare nozzle.

(3) A coating nozzle having a slit length corresponding to the width of the workpiece 58 is used for coating the workpiece 58. For this reason, when coating the workpieces 58 having different plate widths in one coating line, it is necessary to change the coating nozzle having a slit length corresponding to the plate width, and the operability is not good.

In view of the above-mentioned problems, the present invention prevents the coating line from being stopped for a long time, and has good operability that can cope with the plate width of the material to be coated without having a spare large nozzle. The purpose is to provide a coating nozzle.

[0008]

The present invention that achieves the above object has the following matters specifying the invention. (1) A slit nozzle main body is arranged along the width direction of the band material so as to face the continuously running band material, and a coating nozzle for flowing a coating liquid from the slit nozzle body to the band material is provided. The main body includes a concave block member and a flat plate block member that face each other across the slit opening, and the concave block member and the flat plate block member are connected to each other by a hinge member so as to be openable and closable.

(2) In the above (1), a detachable block is provided at a slit opening of the concave block member.

(3) In the above (1), the flat plate block member has a detachable flat plate block which faces the concave block member and forms a slit opening, and is attached and detached with an adjusting screw attached to the flat block member. The slit opening can be adjusted by bending the flat plate block.

(4) In the above (1), edge masks for closing the nozzle openings are detachably provided at both ends of the slit nozzle body in the width direction of the strip.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Here, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a part of the slit nozzle body 1 as viewed from the direction of travel of the material to be coated, and FIG. 2 shows a cross section taken along line II-II of FIG. FIG.
2, a slit nozzle body 1 includes a concave block member 2 having a predetermined length supported by a support structure (not shown) at both ends of FIG. 1, and a plurality of hinge members 3 on the upper side.
And the flat block member 4 combined with the concave block member 2. One side of the hinge member 3 is connected to the concave block member 2 by bolts 5a, and the other side of the hinge member 3 is connected to the flat plate block member 4 by bolts 5b.

A detachable block 8 is provided inside the lower part of the concave block member 2 as a detachable detachable member.
The detachable block 8 is configured to be detachably fixed from the back side of the concave block member 2 with a plurality of bolts 9.

Further, on the surface of the flat block member 4 facing the concave block member 2 described above, there is a removable flat block 10 configured as a detachable separate member. It is configured to be detachably fixed by a plurality of bolts 11 from the side.

The concave portion 2a of the concave block member 2 is formed at the center of the block, and the lower removable block 8 faces the removable flat block 10 of the flat block member 4 with a smooth curve, and is formed on a vertical surface. To form one side of the slit opening 13 facing downward.

Detachable flat block 1 of flat block member 4
0 is at least the detachable block 8 of the concave block member 2
Is formed so that the portion facing the lower part of the opening is flexible, and is formed so that the gap between the vertical surface of the detachable block 8 of the concave block member 2 and the concave block member 2 can be adjusted by the slit width adjusting screw 6. Is formed on one side.

As shown in FIG.
Is the hinge member 3 on the fixedly supported concave block member 2.
Can be opened and closed between the dashed line position and the solid line position around the axis, and the upper edge and the edge are integrated with the concave block member 2 by the detachable fixing screws 7 shown in FIGS. 1 and 2 at the closed position of the solid line. .

In FIG. 1 and FIG. 2, reference numeral 12 denotes an edge mask for adjustingably closing both end regions of the lower slit opening 13 of the slit nozzle body 1 in FIG. A stepped notch 2e is formed at the lower rear portion of both ends of the concave block member 2 in FIG. 1, and a pair of brackets 14 are provided in the notch 2e. Is provided. And the edge mask 1
2 is supported on a shaft 15 via a pair of eye plates 16 provided on one side along the length direction so as to be movable in the length direction.

On the front side of the plate block member 4 along the length direction of the edge mask 12, a plurality of vertical grooves formed so as to cut out the surface of the plate block member 4 as shown in FIGS. 17 is formed, and the edge mask 12 is adjusted in position and fixed so as to close the slit opening 13 by a long bolt 18 vertically penetrating into the vertical groove 17. The edge mask 12 can be opened and closed between the position of the chain line and the position of the solid line in FIG.

FIG. 4 is a view taken in the direction of arrows IV-IV in FIG. 3, and shows the relationship between the distal end portion of the detachable plate block 10 and the slit width adjusting screw 6 which is a double screw. That is, the detachable flat plate block 10 has a thin portion 10a at a fixed portion above the connection portion with the adjustment screw 6, and the distal end side can be bent at this portion. Thin part 10a
A hole having the same size as the screw hole of the flat plate block member 4 is formed in the thick portion at the lower portion of the screw shaft 19. The screw shaft 19 extends outward to form a double screw 2
1 screwed into the center hole of the center hole, 2 double screws
A screw having a normal pitch on the outer periphery of the flat plate 1 is screwed into a screw hole at a lower portion of the flat plate block 4.

FIG. 5 is an enlarged view of the edge mask 12 shown in FIG. 2, and FIG. 6 is a sectional view taken along line VI-VI of FIG.
5 and 6, reference numeral 22 denotes a mask plate of a required length supported on one side by an eye plate 16 on a shaft 15 on the bracket 14, and reference numeral 23 denotes a center of the mask plate 22 in the length direction of FIG. Paint pans placed along the coast, 24
Is a rubber mask which is arranged in the paint pan 23 at a position covering the slit opening 13 from below, and is fixed to the mask plate 22 with bolts 25 together with the paint pan 23.

On the other side of the mask plate 22, two long holes 26 are provided on the same line. The tip of the vertical bolt 18 for fixing the edge mask 12 is tightened with a nut through the elongated hole 26, and after adjusting the position of the mask plate 22 in the length direction with the nut loosened, the nut is tightened. The configuration is such that the mask 12 can be fixed at a predetermined position. When the margin for adjusting the slit length by the edge mask 12 is made large, the flat block member 4
A vertical groove 17 for replacing a long bolt 18
The mounting position of the vertically elongated bolt 18 can be changed when the position of the edge mask 12 is changed.

In the configuration shown in FIGS. 1 to 6 as described above, the slit nozzle body 1 has a flat plate block member 4 on the concave side of the concave block member 2 supported at a fixed position, as shown in FIG. The coating liquid is supplied into the slit nozzle main body 1 in a state where the plurality of detachable screws 7 are tightened and fixed, and the width of the slit opening 13 is adjusted by the adjusting screw 6. The coating liquid 60 is sent out in a curtain shape through the slit opening 13 under a constant pressure, and continuous coating is performed by the curtain-shaped coating liquid 60 over the entire width of the coating material 58 that passes immediately below the nozzle. When the slit nozzle body 1 is opened for cleaning the inside or the like, the attachment / detachment screw 7 is loosened to the depth withdrawn from the concave block member 2 and the flat plate block member 4 is hinged.
By opening upward (dotted line position) around the axis of, the two block members 2 and 4 can be opened at the site without separating them.

For this reason, it is not necessary to transport the opened member to another place for cleaning, and it is possible to perform the cleaning operation directly on site in a short time. In addition, the opening and reassembling operations of the slit nozzle body 1 can be performed extremely quickly and easily only by operating the detachable screw 7.

When the slit opening 13 is worn out over a long period of operation and needs to be disassembled and polished,
Are constituted by detachable blocks 8 and 10, respectively, so that only the detachable blocks 8 and 10 may be polished or replaced with spare parts. For this reason, even if it replaces, a spare part becomes small and maintenance becomes easy.

Further, since the edge masks 12 are provided at both end regions of the slit opening 13, the material 58 to be coated is coated.
Is changed, the position of the edge mask 12 is adjusted in the slit length direction, so that one slit nozzle body 1 can cope with most plate widths of the workpiece 58. That is, the slit length of one coating nozzle is manufactured so as to correspond to the maximum plate width of the workpiece 58, and by adjusting the length of the effective slit opening 13 by the edge mask 12, the width of the coating plate having a width smaller than the maximum plate width is adjusted. It can be used for all coatings of the coating material 58, and the number of coating nozzles can be greatly reduced.

As a result, the operability of the coating line using the coating nozzle can be remarkably improved.

[0028]

As described above, according to the present invention, the slit nozzle main body is arranged along the width direction of the strip in opposition to the continuously running strip, and the slit nozzle main body is connected to the strip from the slit nozzle main body. In the coating nozzle for discharging the coating liquid, the slit nozzle main body has a concave block member and a flat plate block member facing each other across the slit opening, and the concave block member and the flat plate block member are hinged so that they can be opened and closed. By joining with members,
The slit nozzle body can be opened and closed as needed, cleaning and polishing can be performed immediately, and workability is good and quick work can be performed.

A detachable block is provided at a slit opening of the concave block member, and the flat plate block member has a detachable flat block facing the concave block member to form a slit opening. Since the slit opening can be adjusted by bending the detachable flat plate block with the adjusting screw attached to the device, the spare part can be reduced in size even if it is replaced.

The edge mask for closing the nozzle opening is detachably provided at both ends of the slit nozzle body in the width direction of the strip, so that even if the width of the strip is changed, it can be accommodated.

[Brief description of the drawings]

FIG. 1 is a partial front view of a coating nozzle according to an example of an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is a plan view showing a part cut away along the line III-III in FIG. 2;

FIG. 4 is a sectional view taken along the line IV-IV in FIG. 3;

FIG. 5 is an end view of an edge mask portion.

FIG. 6 is a plan view of an edge mask portion as viewed in the direction of arrows VI-VI in FIG. 5;

FIG. 7 is a sectional view of a conventional coating nozzle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Slit nozzle main body 2 Concave block member 3 Hinge member 4 Flat plate block member 6 Adjustment screw 8 Detachable block 10 Detachable flat plate block 12 Edge mask 13 Slit opening

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Hiroshi Ito 4--22 Kannon Shinmachi, Nishi-ku, Hiroshima-shi, Hiroshima Mitsubishi Heavy Industries, Ltd. Hiroshima Works (72) Inventor Yoshiaki Takeishi 4-chome Kitahama, Chuo-ku, Osaka-shi, Osaka 5-33 Sumitomo Metal Industries, Ltd. (72) Inventor Hiroshi Kumagai 4-5-33 Kitahama, Chuo-ku, Osaka-shi, Osaka Sumitomo Metal Industries, Ltd. (72) Inventor Kenji Ikishima Chuo-ku, Osaka-shi 4-5-33 Kitahama Sumitomo Metal Industries, Ltd.

Claims (4)

[Claims] 1. A coating nozzle for disposing a slit nozzle main body along a width direction of a strip facing a continuously running strip, and allowing a coating liquid to flow from the slit nozzle main body to the strip. The coating is characterized in that the slit nozzle body has a concave block member and a flat plate block member facing each other across the slit opening, and the concave block member and the flat plate block member are joined by a hinge member so as to be openable and closable. nozzle. 2. The coating nozzle according to claim 1, wherein a detachable block is provided at a slit opening of the concave block member. 3. The flat plate block member has a detachable plate block facing the concave block member and forming a slit opening, and the detachable plate block is bent by an adjusting screw attached to the plate block member. The coating nozzle according to claim 1, wherein the slit opening is adjustable. 4. The coating nozzle according to claim 1, wherein an edge mask for closing the nozzle opening is detachably provided at both ends of the slit nozzle body in the strip width direction.