JP6790897B2 - Liquid component imparting device - Google Patents

Description

The present invention relates to a liquid component imparting device, and more particularly to a doctor chamber type liquid component imparting device.

Patent Document 1 describes a printing apparatus including a doctor chamber for storing ink, a gravure roll for holding ink supplied from the doctor chamber, and a printing roll for transferring ink from the gravure roll. The surface of the gravure roll is processed with recesses for holding ink. Examples of the shape of the concave portion include a closed cell shape such as a grid type, and a diagonal line shape formed so as to spirally extend along the axial direction of the gravure roll. In a printing apparatus such as Patent Document 1, a recess in the shape of a closed cell is adopted on the surface of the gravure roll, but the gravure roll provided in the coating apparatus for applying a paint having a viscosity higher than that of the printing ink. In the case, if a recess in the shape of a closed cell is adopted, a poor appearance of the coating film such as linear unevenness occurs. Therefore, a diagonal recess is adopted.

FIG. 6 shows a doctor chamber type paint applying device in a conventional painting device. This paint applying device includes a gravure roll 100 whose surface is processed with a recess 106, and a doctor chamber 101 having a storage chamber 103 for storing the paint 102. Side seals 104 and 105 are provided at both ends of the storage chamber 103 in the axial direction of the gravure roll 100. The side seals 104 and 105 are in contact with the surface of the gravure roll 100, respectively. The recess 106 extends spirally so that the angle θ formed by the axis L ₁₀₀ of the gravure roll 100 in the direction from the side seal 104 toward the side seal 105 is an acute angle.

Japanese Unexamined Patent Publication No. 2000-141609

As shown in FIG. 7, when the gravure roll 100 rotates in the direction of the arrow P, the paint that has entered the recess 106 flows along the recess 106. According to the inclination direction of the recess 106, in the vicinity of the side seal 104, the paint in the recess 106 flows away from the side seal 104 with respect to the direction of the axis L ₁₀₀ (in the direction of arrow Q), so that the side seal 104 and the gravure roll The paint does not leak through the surface of 100, but in the vicinity of the side seal 105, the paint in the recess 106 flows toward the side seal 105 in the direction of the axis L ₁₀₀ (in the direction of arrow R). Therefore, there is a problem that the paint leaks through between the side seal 105 and the surface of the gravure roll 100 (as shown by the arrow S).

The present invention has been made to solve such a problem, and an object of the present invention is to provide a liquid component imparting device in which a liquid component does not leak when the gravure roll is rotated.

The liquid component imparting device according to the present invention includes a doctor chamber having a storage chamber for storing the liquid component, and a gravure roll for holding the liquid component supplied from the doctor chamber in a recess formed on the surface. A first side seal and a second side seal are provided at both ends of the storage chamber in the axial direction of the roll, and the liquid component in the recess is directed toward the second side seal in the axial direction as the gravure roll rotates. It consists of a first concave portion that spirally extends so as to flow, and a second concave portion that spirally extends so that the liquid component in the concave portion flows toward the first side seal in the axial direction as the gravure roll rotates. The first side seal is in contact with the surface of the gravure roll on which the first concave portion is formed, and the second side seal is in contact with the surface of the gravure roll on which the second concave portion is formed.
The gravure roll includes a first main body portion having a first concave portion formed on the surface and a second main body portion having a second concave portion formed on the surface, and the first main body portion and the second main body portion can be removed. It may be possible.
The gravure roll further includes a third main body between the first main body and the second main body, and the first main body and the second main body can be removed from both ends of the third main body, respectively. It may be attached to.
The angle between the concave portion of the first concave portion and the axis of the gravure roll in the direction from the first side seal to the second side seal may be 20 ° to 80 °.
The angle between the concave portion of the second concave portion and the axis of the gravure roll in the direction from the first side seal to the second side seal may be 100 ° to 160 °.

According to the present invention, on the surface of the gravure roll in contact with the second side seal, as the gravure roll rotates, the liquid component in the recess spirals so as to flow toward the first side seal with respect to the direction of the axis of the gravure roll. Since the concave portion extending in a shape is formed, the liquid component does not pass between the second side seal and the surface of the gravure roll, so that it is possible to prevent the liquid component from leaking when the gravure roll rotates. it can.

It is sectional drawing of the coating | coating apparatus provided with the liquid component addition apparatus which concerns on embodiment of this invention. It is a top view of the state which removed the doctor blade of the liquid component addition device which concerns on this embodiment. It is a partially enlarged view of FIG. It is a top view of the modification of the gravure roll provided in the liquid component addition apparatus which concerns on this embodiment. It is a top view of another modification of the gravure roll provided in the liquid component addition apparatus which concerns on this embodiment. It is a top view of the state in which the doctor blade of the conventional liquid component addition device is removed. It is a partially enlarged view of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 shows a coating apparatus 10 for applying a coating material 2 which is a liquid component to the surface of a steel plate 13. The coating device 10 sandwiches the steel plate 13 between the paint applying device 1 which is a liquid component applying device for applying the paint 2, the applicator roll 11 for applying the paint 2 to the steel plate 13, and the applicator roll 11. It is provided with a metal backup roll 12. The paint applying device 1 includes a doctor chamber 4 having a storage chamber 3 for storing the paint 2, and a metal gravure roll 5 in which a recess 20 for holding the paint supplied from the doctor chamber 4 is formed on the surface 5a. It has. The doctor chamber 4 is provided with two doctor blades 6a and 6b that partially cover the opening of the storage chamber 3 and are in contact with the surface 5a of the gravure roll 5. The surface 5a of the gravure roll 5 and the surface 11a of the applicator roll 11 are in contact with each other. The surface 11a of the applicator roll 11 is made of rubber.

As shown in FIG. 2, respectively, the side seals 18 and side seals 19 made of polyethylene foam is provided on both ends of the storage chamber 3 with respect to the axis L ₅ direction of the gravure roll 5. In this embodiment, the former is a first side seal and the latter is a second side seal. In this definition, the former may be the second side seal and the latter may be the first side seal, depending on the rotation direction of the gravure roll 5, as will be described in a modified example described later. The gravure roll 5 is provided so that its surface 5a is in contact with each of the side seal 18 and the side seal 19.

The recess 20 formed on the surface 5a of the gravure roll 5 is composed of a first recess portion 21 and a second recess portion 22. The side seal 18 is in contact with the surface 5a on which the first concave portion 21 is formed, and the side seal 19 is in contact with the surface 5a on which the second concave portion 22 is formed. In the first concave portion 21, the concave portion 20 extends spirally so that the angle θ ₁ formed by the axis L ₅ of the gravure roll 5 in the direction from the side seal 18 toward the side seal 19 is 45 °. On the other hand, in the second recessed portion 22, the recessed portion 20 spirally extends so that the angle θ ₂ formed by the axis L ₅ of the gravure roll 5 in the direction from the side seal 18 toward the side seal 19 is 135 °. ..

Next, the operation of the coating apparatus including the liquid component imparting apparatus according to the embodiment of the present invention will be described.
As shown in FIG. 1, when the gravure roll 5 rotates in the direction of the arrow A, the paint 2 enters the recess 20, and the paint 2 overflowing from the recess 20 is scraped off into the storage chamber 3 by the doctor blades 6a and 6b. By doing so, an appropriate amount of the paint 2 is held in the recess 20. Along with the rotation of the gravure roll 5, the applicator roll 11 in contact with the gravure roll 5 also rotates. Since the gravure roll 5 and the applicator roll 11 are in contact with each other, the paint 2 in the recess 20 is transferred onto the surface 11a of the applicator roll 11. The backup roll 12 also rotates with the rotation of the applicator roll 11, and the paint 2 on the surface 11a of the applicator roll 11 is applied to the surface of the steel plate 13 which is conveyed while being sandwiched between them.

Next, the principle that the paint 2 in the storage chamber 3 of the doctor chamber 4 is supplied into the recess 20 formed in the surface 5a of the gravure roll 5 will be described with reference to FIG.
When the gravure roll 5 rotates in the direction of the arrow A, the paint 2 that has entered the recess 20 flows along the recess 20. In the first recess portion 21, the coating material 2 flows along the recesses 20, coating material 2 is made to flow away from the side seal 18 with respect to the direction of the axis L ₅ (the direction of arrow B), the side seal 18 It does not pass between the surface 5a of the gravure roll 5. On the other hand, in the second recess portion 22, the coating material 2 flows along the recesses 20, coating material 2 will be away from the side seal 19 with respect to the direction of the axis L ₅ flows (in the direction of arrow C), the side seals It does not pass between 19 and the surface 5a of the gravure roll 5. As a result, the paint 2 can be prevented from leaking from between the side seals 18 and 19 and the surface 5a of the gravure roll 5.

Thus, the surface 5a of the gravure roll 5 side seal 19 is in contact, a spiral to flow toward the side seal 18 with respect to the direction of the paint 2 axis L ₅ in the recess 20 with the gravure roll 5 rotates Since the recess 20 extending into the gravure roll 5 is formed, the paint 2 does not pass between the side seal 19 and the surface 5a of the gravure roll 5, so that the paint 2 is prevented from leaking when the gravure roll 5 rotates. be able to.

In this embodiment, the angle theta ₁ of the axis L ₅ of the recess 20 and the direction of the gravure roll 5 toward the side seal 18 to the side seal 19 in the first recess portion 21 was 45 °, this angle It is not limited, and may be in the range of 20 ° to 80 °. If this angle is less than 20 °, horizontal streaks will occur on the painted surface of the steel plate 13 and the appearance will be poor. If this angle exceeds 80 °, vertical streaks will occur on the painted surface of the steel plate 13 and the appearance will be poor. It was confirmed that it was defective. Further, the angle θ ₂ formed by the recess 20 in the second recess portion 22 and the axis L ₅ of the gravure roll 5 in the direction from the side seal 18 toward the side seal 19 was 135 °, but the angle is not limited to this angle. It may be in the range of 100 ° to 160 °. When this angle is 90 ° or more and less than 100 °, the fluidity of the paint is low, and the paint once entered may stick, which is not preferable. Further, when this angle exceeds 160 °, the fluidity for returning the paint into the chamber is low, so that the paint may leak from between the side seal 19 and the surface 5a of the gravure roll 5, which is not preferable.

In this embodiment, the first concave portion 21 and the second concave portion 22 are formed on the surface 5a of the gravure roll 5, but the present invention is not limited to this embodiment. As shown in FIG. 4, the gravure roll 5 is configured by detachably attaching the second main body 32 to the end of the first main body 31, and the first concave portion 21 is attached to the surface 31a of the first main body 31. The second recessed portion 22 may be formed on the surface 32a of the second main body portion 32. Thereby, the combination of the shapes of the first concave portion 21 and the second concave portion 22 can be changed according to the characteristics of the paint 2.

Further, as shown in FIG. 5, the gravure roll 5 may be composed of a first main body portion 31, a second main body portion 32, and a third main body portion 33 provided between them. In FIG. 5, the first concave portion 21 is formed on the surface 33a of the third main body 33, but the second concave portion 22 may be formed. Further, in FIG. 5, the first main body 31 is detachably attached to the left end of the third main body 33, and the second main body 32 is detachably attached to the right end of the third main body 33, but the left end. The second main body 32 may be attached to the right end, and the first main body 31 may be attached to the right end. It is necessary to attach the first main body 31 and the second main body 32 as in the latter case when the rotation direction of the gravure roll 5 is opposite to that of the embodiment. In this case, the paint 2 may leak from between the side seal 18 (see FIG. 2) and the surface 5a of the gravure roll 5, so that the side seal 18 comes into contact with the surface 5a on which the second concave portion 22 is formed. In addition, it is necessary to assemble the first main body portion 31, the second main body portion 32, and the third main body portion 33. In this case, unlike the embodiment, the side seal 19 is the first side seal and the side seal 18 is the second side seal.

In this embodiment, the liquid component stored in the storage chamber 3 is the paint 2, but the present invention is not limited to this, and an ink as in Patent Document 1, an adhesive, or the like may be used. That is, any liquid (including paste) substance may be used.

1 Paint application device (liquid component application device), 2 paint (liquid component), 3 storage chamber, 4 doctor chamber, 5 gravure roll, 5a (gravure roll) surface, 18, 19 side seals (1st side seal, 1st) 2 side seals), 20 recesses, 21 1st recesses, 22 2nd recesses, 31 1st body, 32 2nd body, 33 3rd body, L ₅ (gravure roll) axis.

Claims (5)

A doctor chamber with a storage chamber for storing liquid components,
A gravure roll that holds the liquid component supplied from the doctor chamber in a recess formed on the surface is provided.
A first side seal and a second side seal are provided at both ends of the storage chamber in the axial direction of the gravure roll.
The recess is
As the gravure roll rotates, the liquid component in the recess extends spirally so as to flow toward the second side seal in the axial direction, and the first recess portion.
As the gravure roll rotates, the liquid component in the recess is composed of a second recess portion that spirally extends so as to flow toward the first side seal in the axial direction.
The surface of the gravure roll on which the first concave portion is formed is in contact with the first side seal, and the surface of the gravure roll on which the second concave portion is formed is provided with a liquid component to which the second side seal is in contact. apparatus. The gravure roll is
The first main body portion in which the first concave portion is formed on the surface, and
A second main body portion having the second concave portion formed on the surface thereof is provided.
The liquid component imparting device according to claim 1, wherein the first main body and the second main body are removable. The gravure roll further includes a third main body portion between the first main body portion and the second main body portion.
The liquid component applying device according to claim 2, wherein the first main body and the second main body can be removably attached to any of both ends of the third main body, respectively. Any of claims 1 to 3, wherein the angle formed by the concave portion of the first concave portion and the axis of the gravure roll in the direction from the first side seal to the second side seal is 20 ° to 80 °. The liquid component imparting device according to item 1. Any of claims 1 to 4, wherein the angle formed by the concave portion of the second concave portion and the axis of the gravure roll in the direction from the first side seal to the second side seal is 100 ° to 160 °. The liquid component imparting device according to item 1.

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