JPH1190289A - Application roll - Google Patents

Abstract

PROBLEM TO BE SOLVED: To apply a coating agent such as a resin and a kind of ink uniformly on the whole substrate by forming numbers of independent ring-shaped guide grooves which guide the coating agent to the outside of a roll in the axial direction of a rotary shaft at intervals not to cross. SOLUTION: A rotary shaft 1 is arranged horizontally in a cylindrical molding mold whose inner surface is coated with an agent, and a liquid synthetic rubber material to be the raw material of a roll 2 is cast into the molding mold to form the roll 2 around the shaft 1 in the molding mold. On the outside of the roll 2, ring-shaped grooves 3, which make the axis of the shaft 1 a central line, are independent of each other, and do not cross each other, are formed in the axial direction of the shaft 1 at regular intervals. On the outside of the roll 2, round guide grooves 3 which makes the axis of the shaft 1 a central line, are independent of each other, and do not cross each other is formed diagonally. In this way, the coating agent can be applied uniformly on the whole substrate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating roll used for applying a coating material such as a resin or ink to a front surface or a back surface of a substrate such as a printed board or a glass substrate.

[0002]

2. Description of the Related Art Conventionally, when a coating agent such as resin or ink is applied to the front or back surface of a substrate such as a printed board or a glass substrate, a single spiral groove B is applied as shown in FIG. Was supplied from a supply device D called a doctor to an application roll C having a coating agent, and the application agent was applied by being pressed against the front or back surface of the base material A while rotating the application roll C.

[0003]

However, the conventional coating roll has the following problems. (1) While the coating material is applied to the front or back surface of the base material A by the rotating coating roll C, the coating material is moved in the lateral direction of the base material A along the spiral groove B and gradually becomes the same roll. C
Of the coating agent, the coating thickness of the coating agent becomes non-uniform. Further, when a large amount of the coating agent is supplied to the coating roll C, the coating agent which is moved in the lateral direction of the base material A may overflow from the side of the base material A, and the periphery of the base material A becomes dirty. (2) If air bubbles are entrapped in the spiral groove B during the application operation, the application of the coating agent is not applied to the foam portions, so that the coating remains. Furthermore, since the foam moves along the spiral groove B, the unpainted portion of the foam also moves along the spiral groove B, and the unpainted portion of the foam may be scattered on the application surface of the base material A. (3) The air bubbles entrapped in the spiral groove B during the coating operation often burst and pinholes are generated on the coating surface of the substrate A. (4) Since the spiral groove B is a single groove, if a part of the spiral groove B is clogged, it becomes difficult for the coating material to flow after the clogged portion, and the coating thickness of the coating material may be uneven. . (5) In general, cleaning and maintenance of the spiral groove requires time and effort.

[0004] It is an object of the present invention to provide a coating material such as a resin or ink which is uniformly applied to the entire base material, so that uneven coating due to air bubbles entrapped in the groove is less likely to occur and the groove is less likely to be clogged. Another object of the present invention is to provide an application roll in which cleaning and maintenance of a groove are easy.

[0005]

A first coating roll according to the present invention is a coating roll in which a roll is formed on the outer periphery of a rotating shaft. A ring-shaped guide groove is formed at intervals in the axial direction of the rotating shaft so as not to intersect.

A second application roll according to the present invention is the first application roll, wherein the ring-shaped guide groove is formed obliquely or at right angles to the rotation axis.

[0007]

First Embodiment A first example of an embodiment of a coating roll according to the present invention will be described in detail with reference to FIG.
This application roll is formed by forming a roll 2 on the outer periphery of a rotating shaft 1, and a large number of ring-shaped guide grooves 3 are formed on the roll 2 at intervals in the axial direction of the rotating shaft 1 so as not to intersect. As the rotating shaft 1, a pipe or rod made of metal or hard resin such as vinyl chloride is used. The length, diameter, outer diameter and the like are arbitrarily selected according to the application. The shape may be any of a square bar, a square pipe, a round bar, a round pipe, and other shapes.

The material of the roll 2 is not particularly limited, but is preferably a rubber-based material, for example, butyl rubber (IIR),
Synthetic rubber materials such as ethylene-propylene rubber (EPR) and nitrile rubber (NBR) can be used. Various methods can be considered as a method for forming the roll 2. As one of them, the rotating shaft 1 is arranged sideways in a cylindrical mold having a release agent applied to its inner surface, and a liquid synthetic rubber material as a raw material of the roll 2 is poured into the mold. Then, a roll 2 is formed on the outer periphery of the rotating shaft 1 in the molding die. By using a molding die, the roll 2 having a length of several tens cm to several meters can be easily formed. It is desirable that the outer peripheral surface of the roll 2 be a perfect circle around the axis of the rotating shaft 1.
By making the shape circular, the coating agent can be applied to the base material in a uniform thickness. As another example, the roll 2 is connected to the rotating shaft 1
Alternatively, it may be formed separately and inserted into the center hole of the rotating shaft 1 and adhered.

Next, on the outer peripheral surface of the roll 2 formed as described above, ring-shaped guide grooves 3 which are independent of each other and do not intersect with each other, with the axis of the rotation shaft 1 as a center line, are formed on the rotation shaft 1. Plural pieces were formed at uniform intervals in the axial direction. Guide groove 3
Pitch (distance between valleys of guide grooves 3 adjacent to each other,
Alternatively, the distance between the apexes of adjacent peaks formed on the outer peripheral surface of the roll 2 by forming the guide groove 3), the depth, the angle, and the like can be arbitrarily selected according to the application. For example, when the angle of the guide groove 3 is 60 °, if the pitch and the depth of the groove 3 are determined as shown in Table 1, it becomes easy to apply the coating material to the base material in a uniform thickness. The width and number of the guide grooves 3 can be arbitrarily selected according to the application, the pitch of the guide grooves 3, or the length of the roll 2. The guide groove 3 can be formed simultaneously with the roll 2 when the roll 2 is formed using the forming die as described above, but can also be formed after the roll 2 is formed.

[0010]

[Table 1]

[0011]

Embodiment 2 A second embodiment of the application roll of the present invention will be described in detail with reference to FIG.
The basic configuration of this application roll is the same as in the first embodiment. The difference is that a plurality of true circular guide grooves 3 that are independent of each other and do not intersect are formed obliquely on the outer peripheral surface of the roll 2 with the axis of the rotation shaft 1 as a center line.

[0012]

Other Embodiments of the Invention Embodiments 1 and 2 of the Invention
In FIG. 2A, the guide grooves 3 are formed at intervals.
The guide grooves 3 can be continuously formed as shown in FIGS. In this case, the shape of the valley of the groove 3 may be a V-shaped cross section as shown in FIG. 2A or a U-shaped cross section as shown in FIG.
It may be a letter shape or a trapezoidal sectional shape as shown in FIG.
These guide grooves 3 are formed at right angles to the rotating shaft 1, but the guide grooves 3 can also be formed at an angle to the rotating shaft 1.

[0013]

[Application example] The application roll of the present invention is used, for example, in the following manner. . As shown in FIGS. 1A and 1B, a coating material such as resin and ink is supplied to the roll 2 from a doctor (supply machine) 10 provided above the roll 2. . At the same time, the roll 2 is rotated while being pressed against the application surface of the substrate 11 to apply the application agent to the front surface or the back surface of the substrate 11.

In the case of an application roll in which the guide groove 3 is inclined as shown in FIG. 1B, the inclination of the guide groove 3 with respect to the substrate 11 can be reduced by reversing the rotating shaft 1 to the left and right. Can be reversed.

[0015]

The coating roll of the present invention has the following effects. . Since the plurality of guide grooves 3 are independent without crossing each other, the coating agent does not move sideways while the coating agent is applied to the front surface or the back surface of the base material, and the width direction of the base material is not changed. Since there is no bias toward one end, the coating agent can be applied to the entire substrate in a uniform thickness, and the coating agent does not easily overflow to the side of the substrate. . Since a large number of guide grooves 3 are independent without crossing each other, even if air bubbles are entrapped in any one of the guide grooves 3, the air bubbles are sent out to the outside when the roll 2 makes one rotation and burst. Since it becomes easier, there is almost no occurrence of unpainted or pinholes due to air bubbles. . Since many guide grooves 3 are independent, even if any one of the guide grooves 3 is clogged, only the guide groove 3 deteriorates the flow of the coating agent, and the other guide grooves 3 Since there is no influence, application unevenness to the base material hardly occurs. . Since many guide grooves 3 are independent, cleaning and maintenance of the guide grooves 3 are easy.

[Brief description of the drawings]

FIGS. 1A and 1B are explanatory views showing different embodiments of a coating roll of the present invention.

FIGS. 2A, 2B and 2C are cross-sectional views showing still another embodiment of the application roll of the present invention.

FIG. 3 is an explanatory view showing a conventional application roll.

[Explanation of symbols]

 1 is a rotating shaft 2 is a roll 3 is a guide groove

Claims (2)

[Claims] 1. An application roll comprising a roll (2) formed on the outer circumference of a rotating shaft (1), and a plurality of independent ring-shaped guides for guiding the coating material on the outer circumference of the roll (2). An application roll, characterized in that the grooves (3) are formed so as to be spaced apart from each other in the axial direction of the rotating shaft (1) so as not to intersect. 2. The coating roll according to claim 1, wherein the ring-shaped guide groove (3) is formed obliquely or at right angles to the rotation axis (1).