JP2002045748A - Coating rod, manufacturing method therefor and coating method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the coating efficiency and the coating performance when a coating process is performed by rotating a coating rod around an axial center and increase the productivity of the coating rod itself. SOLUTION: As two protuberant strips 12 are formed as seen in a double-start thread, the feed amount and the scraped-off amount of a coating agent per single rotation of the coating rod 10 are increased and thus the coating efficiency is improved. Further, the variability of a film thickness (coating irregularities) of the coating agent is controlled without impairing the coating efficiency by reducing the height of the protuberant strip 12 and lessening the feed amount and the scraped-off amount per single rotation. In addition, since the lead is double, the bending rigidity in the axial orthogonal direction is increased, so that the deflection and the consequent deformation of the intermediate part of the rod 10 in the longer direction due to the own gravity of the rod 10, the viscosity resistance of the coating agent and the like, are restrained. Further, when the protuberant strip 12 is formed by rolling, the bend during the rolling is restrained and the lead of a rod material per single rotation during the rolling is double the single pitch P and consequently, the productivity of the rod 10 is increased.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating rod, a method of manufacturing a coating rod, and a coating method, and more particularly, to improving productivity, coating efficiency, and coating performance of a coating rod. It is about technology.

[0002]

2. Description of the Related Art Spiral ridges are provided on the outer periphery of a columnar shape and are disposed substantially parallel to the vicinity of the surface of a member to be coated. A coating rod for applying a predetermined coating agent to the surface of a member to be coated by being relatively moved along a coating member is known. Conventionally, a rod having a predetermined diameter is spirally wound around the outer peripheral surface of a cylindrical rod as such a coating rod.
As described in Japanese Patent Application Publication No. 7 (1999), there has been proposed an apparatus in which spiral ridges are integrally provided by rolling.

The coating rod 100 shown in FIG. 3 is described in Japanese Utility Model Publication No. 4-40767, in which a convex ridge 102 having a semicircular cross section is integrally provided in a spiral shape on the outer peripheral surface. The member 1 to be coated, such as a synthetic resin film or sheet, used as shown in (a) and (b) of FIG.
A predetermined coating agent 106 is applied to the surface of the substrate 04. The upper half of FIG. 3 is a front external view, and the lower half is a cross-sectional view. The coating material 106 is, for example, a liquid material having predetermined viscosity and fluidity.

In FIG. 4A, a coating rod 100 is disposed substantially in parallel above a feed roller 108 disposed substantially horizontally, and a member 104 having a longitudinal shape is coated with a feed roller 108.
By moving the coating rod 100 in the feed direction as shown by an arrow at a constant rotation speed determined according to the feed speed, the coating member 104 The coating agent 106 supplied to the upper surface of the substrate 104 is fed in a fixed amount, and is applied to the upper surface of the member to be coated 104 with a predetermined thickness substantially uniformly. FIG. 4B shows that the coating agent 1 is fed by a plurality of feed rollers 110.
The coating agent 106 is caused to adhere to the surface of the member to be coated 104 by running the member to be coated 104 inside the container 112 in which
The coating rod 100 disposed substantially parallel to and near the surface of the member to be coated 104 is rotated at a predetermined rotation speed in the opposite direction as shown by the arrow, and the excess coating agent 104 Is scraped off, the member to be coated 104
The coating agent 106 is applied to the surface of the substrate with a predetermined thickness substantially uniformly.

FIG. 4 (a) also shows a member 1 to be coated.
By rotating the coating rod 100 in a direction opposite to the running direction of the coating material 04 to prevent the excess coating material 106 from passing therethrough, the coating material 106 may be applied substantially uniformly. The working mode of the working rod 100 is shown in FIG.
It is not limited to (b).

On the other hand, such a coating rod 100 is
For example, it is manufactured by a rolling apparatus 20 shown in FIG. The rolling device 20 includes a pair of rolling dies 22, 24.
The rolling process is performed by pinching the cylindrical rod material 26 from both sides. The rod material 26 is supported by a support member 28. FIG. 5A is a front view of the rod material 26 as viewed from the axial direction, and FIG. 5B is a right side view of FIG. In each of the rolling dies 22, 24, the formed convex portion 30 having a cross-sectional shape corresponding to the concave shape between the convex stripes 102 has a pitch (= lead) P substantially equal to the pitch (= lead) P of the convex stripes 102, strictly P × cos θ (θ: lead angle of the ridge 102)
A plurality of leads are provided in parallel with the outer peripheral surface, that is, in the state of zero, with a lead in the axial direction of the rod material 26 as shown in FIG. It is arranged in a posture inclined at the same angle as the lead angle θ of the ridge 102 from a direction perpendicular to the direction. A pair of rolling dies 22, 2
4 is the angle θ in the direction opposite to each other in the state of FIG.
In this state, the ridge 102 is rolled at the lead angle θ on the outer peripheral surface of the rod material 26 by being rotationally driven in the direction indicated by the arrow in FIG. And the rod material 26 rotates around the axis as shown in FIG.
The lead rod is fed to the left in (b) and cut at a predetermined length to obtain the coating rod 100. In addition,
Either one of the pair of rolling dies 22 and 24 may have a cylindrical surface without the forming protrusion 30.

[0007]

However, in such a conventional coating rod 100, the pitch P of the ridge 102 is equal to that of the lead, and only one ridge is provided on the outer peripheral surface like a single thread. Because of this, one of the coating rods 100
The amount of coating agent sent per revolution and the amount of scraping are small,
There was a problem that the coating efficiency was not always good.

In addition, since the pitch P is equal to the lead, the amount of advance per rotation of the rod material 26 is 1 pitch P in FIG. 5B, and the productivity is not always good. In addition, since the lead is small, bending is likely to occur during rolling, and the bending rigidity in the direction perpendicular to the axis is low, and the middle part in the longitudinal direction due to its own gravity and the viscous resistance of the coating agent during coating. It is easy to bend and deform, and in any case, coating unevenness or the like occurs, which causes deterioration of coating performance.

The present invention has been made in view of the above circumstances, and an object of the present invention is to improve coating efficiency and coating performance when coating is performed by rotating a coating rod around an axis. In addition to improving the productivity, the productivity of the coating rod itself is improved.

[0010]

In order to achieve the above object, a first invention is to provide a helical ridge provided on the outer periphery of a columnar shape so that a predetermined coating agent is applied to the surface of a member to be coated. A coating rod to be coated, wherein the ridged lead has a pitch of 2
It is characterized in that two or more convex ridges are provided, as in the case of a multi-threaded screw, at an integral multiple of the above.

A second invention is a method of manufacturing a coating rod in which a cylindrical ridge is provided spirally on the outer periphery and a predetermined coating agent is applied to the surface of a member to be coated. A state in which the axis of the rolling die is inclined by a predetermined inclination angle with respect to the axis of the rod material by using a rolling die provided with a plurality of molded projections having no lead on the surface at a predetermined pitch. By rotating while pressing against the outer peripheral surface of the rod material at the time of rolling the spiral ridge on the outer peripheral portion of the rod material, the lead of the ridge is an integral multiple of 2 or more of the pitch. The inclination angle is set so that two or more convex ridges are provided like a multi-thread screw.

A third invention is a coating method for applying a predetermined coating agent to the surface of a member to be coated by using a coating rod having a helical ridge provided on the outer periphery of a cylindrical shape. Then, using a coating rod in which the lead of the ridge is an integral multiple of 2 or more of the pitch and the ridge is provided with two or more threads like a multi-thread screw, the coating rod is covered with the coating rod. A predetermined coating agent is disposed on the surface of the member to be coated by disposing it substantially parallel to the vicinity of the surface of the member to be coated, rotating about the axis and relatively moving along the surface of the member to be coated. Is applied.

[0013]

In such a coating rod, the lead of the ridge is an integral multiple of 2 or more of the pitch, and the ridge is provided with two or more leads like a multi-thread screw. When applying the coating agent by rotating the coating rod about the axis as in the invention, the coating rod per rotation of the coating rod is compared with the coating rod having one ridge. The feeding amount and the scraping amount of the agent are increased, and the coating efficiency is improved. In other words, since the coating agent can be sent out or scraped off only a few times by the rotation of the coating rod by one rotation of the coating rod, the coating speed is increased by, for example, increasing the feeding speed of the member to be coated. You can do it. On the other hand, since the number of times of feeding and the number of scrapings per rotation of the coating rod increase, if the height of the ridge is reduced to reduce the amount of feeding and scraping per time, the coating efficiency is impaired. Without this, it is possible to suppress the variation in coating film thickness (uneven coating) and improve the coating performance.

Further, as compared with a coating rod having one ridge, if the pitch is the same, the lead becomes larger, so that the bending rigidity in the direction perpendicular to the axis becomes higher, and the gravity of the coating material and the coating agent of the coating agent become higher. The bending and deformation of the intermediate portion in the longitudinal direction due to viscous resistance and the like are suppressed, and coating performance such as uneven coating is improved. In the case where the ridges are formed by rolling as in the second invention, bending during rolling is suppressed, coating performance is improved in this respect, and one rotation of the rod material during rolling is performed. The advance amount per hit becomes an integral multiple of one pitch, and the productivity is improved.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The coating rod of the present invention is suitably used when a predetermined coating agent is thinly applied to the surface of a synthetic resin film or sheet as a member to be coated.
It can also be used when applying a coating agent to a member to be coated other than such a film or sheet. As the coating agent, for example, a liquid substance having a predetermined fluidity and viscosity is suitably used, but a powdery substance or the like can be applied as the coating agent.

The number of the ridges is suitably from 2 to 4.
It is also possible to provide five or more articles.

In the second invention, the ridge is formed by rolling using a rolling die provided with a molded ridge having no lead. However, the formed ridge is twisted by the same lead as the ridge. Rolling can be performed by using a rolling die having a portion, or it can be manufactured by a manufacturing method other than rolling, such as cutting.

In carrying out the second invention, the rolling apparatus 20 shown in FIG. 5 can be used as it is, and by appropriately setting the inclination angle (lead angle) θ, the coating rod of the present invention can be used. Can be manufactured. As one of the pair of rolling dies 22 and 24 in FIG. 5, a cylindrical die having no forming protrusion 30 may be used.

The coating method according to the third invention is, for example, as shown in FIG.
Although the present invention is carried out in the modes shown in (a) and (b), it can be carried out in other modes.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a view showing a coating rod 10 according to one embodiment of the present invention, in which a ridge 12 is provided spirally at a predetermined interval around a cylindrical outer peripheral portion.
The lead of the ridge 12 is twice the pitch P, and two ridges 12 are provided at a constant pitch P like a double thread.
Such a coating rod 10 is provided by the coating rod 10
As in the case of No. 0, it is suitably manufactured using the rolling apparatus 20 of FIG. In this case, the formed convex portion 30 is formed in a cross-sectional shape corresponding to the concave shape between the convex ridges 12, and the inclination angle θ is set to the lead (twice the pitch P) of the convex ridges 12 and A ridge 12 determined according to the outer diameter of the rod 10
Is set to the same angle as the lead angle.

Further, such a coating rod 10 is disposed substantially parallel to the vicinity of the surface of the member to be coated, and is rotated about an axis and relatively moved along the surface of the member to be coated. As a result, it is used so that a predetermined coating agent is applied substantially uniformly to the surface of the member to be coated. For example, in FIGS. 4A and 4B, the coating rod 100
Is disposed in place of, and is rotated around the axis in a predetermined rotation direction, so that the coating material 106 is fed in a fixed amount or scraped off, and the surface of the member 104 to be coated is formed with a predetermined thickness. It is applied almost uniformly.

Here, in such a coating rod 10, the lead of the ridge 12 is twice as large as the pitch P, and the ridge 12 is provided in two like a double thread. When the coating material 106 is applied by rotating the coating rod 10 around the axis as shown in FIG. 1, one of the coating rods 10 is compared with a single coating rod having a lead equal to the pitch P. The feeding amount and the scraping amount of the coating agent 106 per rotation are increased, and the coating efficiency is improved. That is, one rotation of the coating rod 10 corresponds to twice the number of the ridges 12 of the coating agent 1.
06 can be sent out or scraped off, so that the coating speed can be increased, for example, by increasing the feeding speed of the member 104 to be coated. On the other hand, since the number of times of feeding and the number of scrapings per rotation of the coating rod 10 increase, the coating efficiency can be improved by lowering the height of the ridge 12 and reducing the amount of sending and scraping per time. The coating performance can be improved by suppressing the variation in the film thickness of the coating agent 106 (uneven coating) without impairing the coating performance.

Further, as compared with a single coating rod, if the pitch P is the same, the lead is doubled, so that the bending rigidity in the direction perpendicular to the axis is increased, and the gravity and the coating agent 106
The intermediate portion in the longitudinal direction is prevented from being bent and deformed due to the viscous resistance and the like, and the coating performance such as uneven coating is improved.
As shown in FIG. 5, when the ridge 12 is formed by rolling, the bending at the time of rolling is suppressed, and also in this respect, the coating performance is improved and the rod material 26 at the time of rolling is formed. The advance amount per rotation is an integral multiple of one pitch P (twice in the embodiment), and the productivity is improved.

The coating rod 10 of the above embodiment is
Although two ridges 12 are provided in a state where the lead is twice the pitch P and has a predetermined interval in the axial direction, for example, as shown in the coating rod 14 in FIG. The number of the ridges, the shape of the recess between the ridges, and the like can be changed as appropriate, for example, four ridges 16 can be provided in close contact with each other in the axial direction.

The embodiments of the present invention have been described in detail with reference to the drawings. However, these embodiments are merely examples, and the present invention is based on the knowledge and knowledge of those skilled in the art. Can be implemented.

[Brief description of the drawings]

FIG. 1 is a view showing a coating rod according to an embodiment of the present invention, and is a front view seen from a direction perpendicular to an axis.

FIG. 2 is a diagram showing another embodiment of the present invention.

FIG. 3 is a partially cutaway front view showing an example of a conventional coating rod.

FIGS. 4A and 4B are schematic diagrams illustrating an example of an apparatus for applying a coating agent using a coating rod.

FIGS. 5A and 5B are schematic views illustrating a rolling device capable of suitably manufacturing a coating rod, wherein FIG. 5A is a front view and FIG. 5B is a right side view of FIG.

[Explanation of symbols]

10, 14: coating rod 12, 16: ridge 2
2, 24: Rolling die 26: Rod material 30: Molding convex part 104: Coating member 106: Coating agent P: Pitch θ: Inclination angle

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B05D 7/04 B05D 7/04

Claims (3)

[Claims] 1. A coating rod for providing a predetermined coating agent on a surface of a member to be coated by forming a spiral ridge on an outer peripheral portion of a cylindrical shape, wherein the lead of the ridge is a pitch. 2. The coating rod according to claim 1, wherein two or more convex ridges are provided, such as multi-threads, at an integral multiple of two or more. 2. A method for manufacturing a coating rod, wherein a helical ridge is provided on an outer peripheral portion of a columnar shape, and a predetermined coating agent is applied to a surface of a member to be coated. Using a rolling die provided with a plurality of forming projections having a predetermined pitch of 0 at a predetermined pitch, the rod centered on the rod is inclined at a predetermined inclination angle with respect to the axis of the rod material. When the spiral ridge is roll-formed on the outer periphery of the rod material by rotating while pressing against the outer peripheral surface of the material, the lead of the ridge has a pitch of 2 pitches.
The method of manufacturing a coating rod, wherein the angle of inclination is set so that the number of protrusions is two or more, such as a multi-threaded screw, at an integer multiple of the above. 3. A coating method in which a predetermined coating agent is applied to a surface of a member to be coated by using a coating rod having a helical ridge provided on an outer peripheral portion of a columnar shape, wherein: The coating rod is provided on the member to be coated by using a coating rod in which the lead of the ridge is an integral multiple of 2 or more of the pitch and the ridge is provided with two or more threads such as a multi-thread screw. A predetermined coating agent is applied to the surface of the member to be coated by arranging the member substantially parallel to the surface of the member and rotating the member around the axis and relatively moving the member along the surface of the member to be coated. A coating method characterized by the following.