JP2016030224A - Band coating device and method, and drum can - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a band coating device and method, and a drum can which improve coating quality of a body part peripheral surface of a metal can as compared with conventional ones without degrading production efficiency.SOLUTION: A band coating device performs band-like coating on a body part peripheral surface 210 of a drum can, and includes a can support mechanism 130 for rotatably supporting the drum can, a plurality of applicator rolls 110 which are in contact with the body part peripheral surface and rotate, and a paint supply device 120 for supplying paint to peripheral surfaces of the respective applicator rolls. A plurality of applicator rolls are arranged in parallel along a center axis of the drum can in an axial periphery direction. Each of them rotates and performs the band-like coating on the body part peripheral surface of the drum can.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a strip coating apparatus and method for performing strip coating on a metal plate, particularly a cylindrical body of a metal can, and a drum can coated with the strip coating apparatus and method.

  The drum can corresponds to, for example, a closed drum specified in JIS Z 1601 (2005 edition), a liquid fat or oil such as a chemical product, petroleum, gasoline or lubricating oil, a liquid dangerous substance having a relatively high viscosity, Is a container suitable for filling and transporting contents and the like that are difficult to take in and out of powder or solid. Such a drum can is known to have a cylindrical hollow body, a ground plate that closes the lower end opening of the body, and a top plate that closes the upper end opening of the body. In the case of a sealed drum, the lower end edge of the body and the outer peripheral edge of the main plate, and the upper end edge of the body and the outer peripheral edge of the top plate are joined to each other by winding to form a chime. The open-type drum can has a canopy that can be opened and closed instead of the top plate, and the chime is formed between the lower end edge of the fuselage and the outer peripheral edge of the main plate, and the upper end edge of the fuselage and the canopy are The outer peripheral edge is fastened by a fastening band.

  The outer surface of these drums is painted in various colors, and this coating prevents rusting of the steel sheet and at the same time maintains a beautiful outer surface design, so that the drum can withstand long-term use indoors and outdoors. Using a single color can that is uniformly coated with the outer surface, or using two or more colors, apply one or more strips on the ground color coating in a different color from the ground color. There are multicolor cans with improved design. In order to apply a belt-like coating on a multicolor can, the paint is transferred from the applicator roll to the outer peripheral surface of the can by usually bringing the band width applicator roll into contact with the outer peripheral surface of the can. The so-called roll coating is performed.

Japanese Patent Laid-Open No. 7-232125

In the case of the roll coating, in order to conceal the background color on the outer peripheral surface of the drum can, it is necessary to apply a thick coating to the outer peripheral surface of the drum can.
However, even if the coating film on the applicator roll is made thick in order to apply the paint thickly, the coating film is not uniformly transferred to the outer peripheral surface of the drum can body part, and there is a problem that uneven coating tends to occur. Furthermore, there is a problem that paint pools are likely to be generated at the end portions, that is, both sides of the applicator roll, and that the paint pools are scattered by the centrifugal force of rotation of the applicator roll, or are easily dripped.

On the other hand, when the paint is applied thinly, the background color is not sufficiently concealed, so that a thin portion of the coating film called so-called skelt is likely to occur, the background color is transparent and the coating is not uniform, and the end of the applicator roll There is a problem that a defect called so-called blur appears in the part.
As a countermeasure for preventing such a scum or blur, there is a method of overcoating by rotating a drum can a plurality of times.

  However, the overcoating method increases the time and decreases the coating efficiency, and causes a shift between the working time in the painting process and the working time in other processes. As a result, the intermediate product waiting for coating stays immediately before the coating process, which causes a problem that the production efficiency of the drum can is remarkably lowered and the production line is stopped.

  The present invention has been made in order to solve the above-described problems, and improves the coating quality on the peripheral surface of the metal can body part without causing a reduction in production efficiency. The object is to provide a method as well as a drum.

In order to achieve the above object, the present invention is configured as follows.
That is, the band coating apparatus according to an aspect of the present invention is a band coating apparatus that performs band-shaped coating on the drum peripheral surface along the drum peripheral surface of the drum,
A can support mechanism for rotatably supporting the drum can in a direction around the center axis of the drum can;
A plurality of roll-shaped applicator rolls rotating in contact with the circumferential surface of the body part;
A coating material supply device for supplying a coating material for belt-like coating to the peripheral surface of each of the applicator rolls,
Each of the applicator rolls is parallel to the drum can center axis and oriented along the drum can center axis, and a plurality of applicator rolls are arranged in the direction around the axis. It is characterized by performing strip-like coating.

  According to the belt coating apparatus in one aspect of the present invention, by providing a plurality of applicator rolls, the coating material supplied from the coating material supply apparatus can be applied in a band shape to the drum can body peripheral surface while each of them rotates. Can do. Therefore, the coating amount per one applicator roll can be reduced as compared with the prior art. Therefore, scattering and sagging of the paint can be eliminated. Further, since the plurality of applicator rolls are arranged in the direction around the central axis of the drum can, the peripheral surface of the applicator roll contacts the drum can body circumferential surface continuously in the rotation direction of the drum can. Therefore, it becomes possible to apply the paint applied to the drum canister peripheral surface by the first applicator roll while leveling by the contact of the next applicator roll. As a result, although the coating amount per one applicator roll is smaller than the conventional one, finally, the same coating amount as the conventional one can be applied uniformly and in the same time as the conventional one. In other words, there is no coating failure such as so-called scallops and unevenness, and there is no coating failure such as blurring, scattering, and sagging at the end of the belt-like coating. It can be done in time. Therefore, in the production line, the intermediate product waiting for painting does not stay immediately before the painting process, and the production efficiency of the drum can is not lowered.

It is a front view of the belt coating apparatus in Embodiment 1 of this invention. It is a side view of the belt coating apparatus shown in FIG. It is a front view of the strip coating apparatus in Embodiment 2 of this invention. It is a front view of the strip coating apparatus in Embodiment 3 of this invention.

  The band coating apparatus and method, and the drum can manufactured by these apparatuses and methods, which are embodiments of the present invention, will be described below with reference to the drawings. In each figure, the same or similar components are denoted by the same reference numerals. In addition, in order to avoid the following description from becoming unnecessarily redundant and to facilitate understanding by those skilled in the art, a detailed description of already well-known matters and a duplicate description of substantially the same configuration may be omitted. . Further, the contents of the following description and the accompanying drawings are not intended to limit the subject matter described in the claims.

  In the band coating apparatus and method in each embodiment described below, a drum can is taken as an example of an object to be coated in which band-shaped coating is performed. However, the object to which the belt coating apparatus and method described here can be applied is not limited to a drum can, but a metal plate that is coated in a strip shape using a so-called roll coater, particularly a cylinder of a metal can. It can be applied to a case where a belt-like coating is applied to the trunk.

  Here, the drum can corresponds to a hermetically sealed drum defined in JIS Z 1601 (2005 edition). Moreover, in the drum can made of steel plates other than stainless steel, the base coating has already been performed before the band coating by the band coating apparatus of each embodiment. In the case of stainless steel, the base coating is not made.

Embodiment 1 FIG.
FIG. 1 shows a front view of a band coating apparatus 101 according to Embodiment 1, and FIG. 2 shows a side view thereof.
The belt coating apparatus 101 is an apparatus that performs a belt-like coating 250 on the body peripheral surface 210 along the body peripheral surface 210 of the drum can 200. As a basic configuration, the applicator roll 110, the paint supply device 120, A can support mechanism 130.
The operation of the belt coating apparatus 101 will be briefly described. The peripheral surface of the applicator roll 110 is applied by the coating material supply device 120 to the body peripheral surface 210 of the drum can 200 that is rotatably supported by the can support mechanism 130. The coating material supplied to 111 is transferred into a belt shape by the rotation of the applicator roll 110. In this way, the belt-like coating 250 is applied to the drum portion peripheral surface 210 of the drum can 200.
Hereinafter, each of these components will be described in detail.

First, the paint supply apparatus 120 that supplies paint to the peripheral surface 111 of the applicator roll 110 will be described.
In the first embodiment, the paint supply device 120 has a paint tank 121, one pickup roll 122, and a rotation mechanism 123 as a basic configuration, and further a doctor roll corresponding to an example of a paint adjusting member. 124 may additionally be provided.

The paint tank 121 is a container that stores the paint 125 that is supplied to the peripheral surface 111 of the applicator roll 110 and applied to the body peripheral surface 210 of the drum can 200.
The pickup roll 122 is a member having a cylindrical or columnar roll shape, and has a roll peripheral surface 122 a that contacts the peripheral surface 111 of the applicator roll 110. Such a pick-up roll 122 can be immersed in the paint 125 in the paint tank 121 with the roll peripheral surface 122a and can be rotated and arranged in the paint tank 121 to be supported. Here, the pick-up roll 122 is arranged so that its rotation center shaft 122 b is oriented along the axial direction 203 of the drum can 200 and is opposed to the body peripheral surface 210 of the drum can 200.
The rotation mechanism 123 is a mechanism that rotates the pickup roll 122 in the direction around the axis of the rotation center shaft 122b, and includes, for example, a motor as a driving device and a transmission device that transmits power from the motor to the pickup roll 122.
Therefore, the pick-up roll 122 is rotated in the direction around the rotation center shaft 122b by driving by the rotation mechanism 123, and the paint 125 is attached to the roll peripheral surface 122a immersed in the paint 125. The roll is transferred to the peripheral surface 11 of the applicator roll 110, which will be described in detail below, in contact with the roll peripheral surface 122 a of the pickup roll 122 and rotating together.

  Such a pickup roll 122 is made of, for example, a metal such as stainless steel, chrome-plated steel, or steel. The roll peripheral surface 122a is provided with, for example, a mesh-like mesh so that the paint 125 can be easily attached and held. Has been. Further, the amount of the paint 125 that adheres to and is held on the roll peripheral surface 122 a of the pickup roll 122 can be adjusted by the size of the mesh or the rotation speed of the pickup roll 122.

  In the first embodiment, one doctor roll 124 is provided. The doctor roll 124 is a member having a cylindrical or columnar roll shape, the rotation center axis 124 b is oriented along the axial direction 203 of the drum can 200, and the roll surface 124 a is the roll peripheral surface of the pickup roll 122. It is arranged in contact with 122a. Accordingly, the doctor roll 124 rotates in the direction around the rotation center axis 124 b as the pickup roll 122 rotates, and performs quantitative adjustment of the paint 125 excessively attached to the roll peripheral surface 122 a of the pickup roll 122. This quantitative adjustment is performed, for example, by adjusting the pressing force of the doctor roll 124 against the roll peripheral surface 122a of the pickup roll 122, changing the material of the roll surface 124a of the doctor roll 124, changing to a member having a shape other than the roll shape, and the like. be able to.

  Here, the amount of the paint 125 attached to the pick-up roll 122 and picked up increases in proportion to the rotational speed of the pick-up roll 122. On the other hand, in order to perform coating with high efficiency on the drum peripheral surface 210 of the drum can 200, it is preferable that the rotation speed of the pickup roll 122 is large. Therefore, when coating is performed by increasing the rotational speed of the pick-up roll 122, by using the doctor roll 124 to limit the amount of the paint 125 applied to an appropriate amount, satisfactory coating can be achieved even at high-speed coating.

  Such a doctor roll 124 is preferably made of a metal such as stainless steel, chrome-plated steel, or steel. The doctor roll 124 is not limited to the roll shape as in the present embodiment, and as another example of the paint adjusting member, the amount of the paint 125 using a plate-like doctor blade such as a steel plate or nylon (registered trademark), for example. May be adjusted. On the other hand, depending on the surface state of the roll peripheral surface 122a of the pickup roll 122, the rotational speed of the pickup roll 122, and the viscosity of the paint 125, the doctor roll 124 or the doctor blade may not be required.

Next, the applicator roll 110 will be described.
The applicator roll 110 is a member having a cylindrical or columnar roll shape. The applicator roll 110 is parallel to the center axis 201 of the drum can 200 and the rotation center axis 122b of the pickup roll 122 along the axial direction 203 of the drum can 200. The central axis 112 is oriented between the pickup roll 122 and the drum can 200. A plurality of applicator rolls 110 are arranged in the direction 202 around the central axis of the drum can 200. In the first embodiment, as shown in FIG. 1, two applicator rolls 110, that is, an applicator roll 110a and an applicator roll 110b are arranged in the direction 202 around the central axis.

  Each of these applicator rolls 110 is in contact with the peripheral surface 111 of the drum can 200 and the roll peripheral surface 122a of the pickup roll 122 as described above. Accordingly, each applicator roll 110 rotates with the rotation of the pickup roll 122 to transfer the paint 125 from the roll peripheral surface 122 a of the pickup roll 122 to the peripheral surface 111, and further to the peripheral surface 111 while rotating the drum can 200. The applied paint 125 is applied to the drum peripheral surface 210 of the drum can 200. By this operation, the applicator roll 110 performs the strip-shaped coating 250 on the body peripheral surface 210.

  More specifically, at least the peripheral surface 111 of the applicator roll 110 according to the first embodiment is made of a rubber material such as polyurethane, butyl rubber, nitrile rubber, polysulfide, or neoprene. The hardness of the rubber material is not particularly limited, but considering the occurrence of uneven coating of the paint on the peripheral surface 210 of the body and the damage of the rubber material, the rubber material has a Shore hardness of 40 to 75 °. A range, for example 55-65 °. If the Shore hardness is less than 40 °, the rubber material may be too soft and easily damaged, and the durability may be inferior. On the other hand, if it exceeds 75 °, the nip pressure between the rubber material and the painted surface will increase, resulting in coating unevenness. The case where it becomes easy can be considered.

  As described above, a plurality of applicator rolls 110 are in contact with the body peripheral surface 210. By simultaneously applying with a plurality of applicator rolls 110, the amount of application per one can be made smaller than in the prior art. Furthermore, since each applicator roll 110 is continuously in contact with the drum portion 200 peripheral surface 210, the first transferred paint can be applied while being leveled by the second contact. As a result, for example, even when the concentration of the coating material 125 is the same as or similar to the conventional one, the thickness of the coating applied with one applicator roll 110 can be made thinner than the conventional one. That is, a thin coating thickness can be applied repeatedly several times, and the coating thickness when completed can be made the same as before. In this way, by making the number of applicator rolls 110 plural, not only can the overcoating be performed quickly, but also the application can be averaged, and further the occurrence of paint splattering and biasing can be further suppressed, And the time which an application process requires can be shortened.

Further, according to the ingenuity of the applicant, the amount of paint per applicator roll 110 is preferably not more than 20 mg / dm ² (60 mg / dm ^{2 in} terms of the weight before baking) as the dry weight of the paint. Furthermore, it has become clear that it is more preferable that the dry weight does not exceed 15 mg / dm ² (the weight before baking is 45 mg / dm ² ). When the amount of paint per applicator roll 110 exceeds 20 mg / dm ² in terms of dry weight of paint, there is a high possibility of occurrence of problems such as paint scattering and sagging. In order to achieve these target values, the target dry weight of the coating material on the drum peripheral surface 210 of the drum can 200 is, for example, 60 mg / dm ² , ^two applicator rolls 110 are arranged, and the coating amount per one is the above-described amount. In the case of 15 mg / dm ² , two rotations in the drum can 200, that is, four times of coating by the applicator roll 110 are required.
In addition, when the application amount per applicator roll 110 is lower than 15 mg / dm ² in terms of dry weight, a method of increasing the number of rotations of the drum can 200 is also a proposal. However, since the coating process time may become long, it is preferable to increase the number of applicator rolls 110.

  As shown in other embodiments described below and in the first embodiment, by providing a plurality of applicator rolls 110, application of a so-called scale caused by partial unevenness in the thickness of the paint Unevenness is eliminated, and coating with a thickness that hides the base color of the drum can 200 quickly and uniformly is possible. In addition, sagging due to a partial excessive amount of paint disappeared at both side ends of the belt-like coating 250, and the scattering of the paint due to excessive coating adhesion at the end of the applicator roll 110 also disappeared. Furthermore, by providing a plurality of applicator rolls 110, the overcoating is continuously performed at short intervals in the axial direction 202 on the barrel peripheral surface 210 of the drum can 200, resulting in a partial lack of paint. In addition, it is possible to effectively suppress the occurrence of so-called scratches and poor wetting with respect to the ground or band edge due to repelling. Therefore, high-quality belt-like coating can be implemented with high efficiency. The poor wetting is a state in which the surface tension of the paint is large and the paint does not spread uniformly on the base, and the repellency is a state in which the wettability is worse than the poor wetting.

Next, the can support mechanism 130 will be described.
The can support mechanism 130 holds the drum portion 200 circumferential surface 210 in an appropriate position with respect to the applicator roll 110, and rotates the drum can 200 in a direction 202 around the central axis 201 of the drum can 200 with less vibration. It is a device that supports it, and includes a support rotation member 131 and a pressing device 135.
The support rotation member 131 is configured by rotatably installing the roll member 133 on the support body 132, arranges the drum can 200 at an appropriate position, and supports the drum can 200 so that the drum can 200 can be smoothly rotated in the direction around the axis 202. The roll member 133 is disposed in contact with the drum can 200 at at least three locations around the drum can 200 at each end portion of the drum can 200 in the axial direction 203 of the drum can 200. In the first embodiment, as shown in the figure, four roll members 133 are provided on each of the upper and lower supports 132 in the diameter direction of the drum can 200, and a total of eight roll members 133 are provided for each drum can 200. It has been.

  The pressing device 135 is a device for displacing the support rotating member 131 in the diameter direction of the drum can 200 so that the applicator roll 110 is pressed against the body peripheral surface 210 of the drum can 200 with an appropriate pressing force. In the first embodiment, the pressing device 135 includes a hydraulic or pneumatic cylinder 136 and a drive control unit 137 that performs drive control of the cylinder. In the first embodiment, the pressing device 135 is provided on each of the upper and lower supports 132 in the diameter direction of the drum can 200.

The operation of the belt coating apparatus 101 configured as described above will be described.
The drum can 200 is held by the can support mechanism 130, and the applicator roll 110 and the coating material supply device 120 are set to the lower part of the drum can 200 so that the applicator roll 110 is positioned on the drum peripheral surface 210 of the held drum can 200. On the contrary, the drum can 200 may be set to the positioned applicator roll 110.

Next, the pick-up roll 122 is rotated by the rotating mechanism 123 so that the paint 125 in the paint tank 121 is adhered to the roll peripheral surface 122a of the pickup roll 122, and the excessive paint 125 on the roll peripheral surface 122a is removed by the doctor roll 124. The Furthermore, the attached paint 125 is transferred to the peripheral surface 111 of the applicator roll 110 by the rotation of the pickup roll 122.
The rotating applicator roll 110 applies the paint 125 on the peripheral surface 111 to the drum peripheral surface 210 of the drum can 200 while rotating the drum 200 in the direction 202 around the central axis. Therefore, the body 250 of the drum can 200 is coated with a coating 250 in a band shape.

  As described above, according to the belt coating apparatus 101 according to the first embodiment, a plurality of, here two, applicator rolls 110 are provided, so that the paint 125 supplied from the paint supply apparatus 120 while each of them rotates. Can be applied to the drum body peripheral surface 210 in a band shape. Therefore, the amount of application to the body peripheral surface 210 of the drum can 200 per one applicator roll 110 can be reduced as compared with the conventional one, and the scattering and sagging of the paint 125 can be eliminated. In addition, since a plurality of two applicator rolls 110 are arranged in the direction 202 around the central axis of the drum can 200, the applicator rolls continuously in a rotation direction of the drum can 200 on the drum can body peripheral surface 210 in a short time. The peripheral surface 111 of 110 is in contact with the body peripheral surface 210. Therefore, it becomes possible to apply the coating 125 applied to the drum can body peripheral surface 210 by the first applicator roll 110a while leveling by the contact of the next applicator roll 110b. As a result, paint 125 having the same concentration as before can be used, and the coating amount per one applicator roll 110 is smaller than the conventional one, but when completed, the same coating amount as the conventional one is applied equally. Can be applied in time. In other words, there is no coating failure such as so-called scallops and unevenness, and there is no coating failure such as blurring, scattering, and sagging at the end of the belt-like coating. It can be done in time. Therefore, in the production line of the drum can 200, the intermediate product waiting for painting does not stay immediately before the painting process, and the production efficiency of the drum can 200 does not decrease.

  Further, as is clear from the above description of the structure of the belt coating apparatus 101, the rotation of the pickup roll 122 rotates the drum can 200 via the rotation of the applicator roll 110. Therefore, the coating speed on the drum can 200, that is, the rotation speed of the drum can 200 is determined by the rotation speed of the pickup roll 122 by the rotation mechanism 123.

  Thus, in order to perform appropriate coating 250 on the drum peripheral surface 210 of the drum can 200, a plurality of applicator rolls 110, a rotation speed of the pickup roll 122, in other words, a rotation speed of the drum can 200, and a single applicator roll. It can be seen that there is an appropriate correlation between the coating film thickness of 110 and factors including the environmental temperature of the band coating device, in other words, the drying temperature of the paint. Therefore, in order to perform high-quality and stable coating without causing a reduction in production efficiency as compared with the conventional case, the number of rotations of the drum can 200 and the coating by one applicator roll 110 are made according to the number of applicator rolls 110. It is necessary to adjust the film thickness.

Embodiment 2. FIG.
In the band coating apparatus 101 according to Embodiment 1 described above, the pickup roll 122 has a single configuration. On the other hand, as shown in FIG. 3, the band coating apparatus 102 according to the second embodiment has a configuration in which a set of a pick-up roll 122 and a doctor roll 124 is provided for each applicator roll 110a, 110b. That is, the band coating apparatus 102 has a configuration in which a pickup roll 122-1 and a doctor roll 124-1 are installed corresponding to the applicator roll 110a, and a pickup roll 122-2 and a doctor roll 124-2 are installed corresponding to the applicator roll 110b. Have In other words, the second embodiment shows a configuration in which the same number of pickup rolls 122 as the applicator rolls 110 are provided.
Other structures in the band coating apparatus 102 are the same as those in the band coating apparatus 101 in the first embodiment.

  In the band coating apparatus 102 configured as described above, the paint 125 is supplied to the applicator rolls 110a and 110b independently from the pickup rolls 122-1 and 122-2. Therefore, the band coating apparatus 102 has the effects obtained by the band coating apparatus 101 in the first embodiment, and further, compared with the band coating apparatus 101 in the first embodiment, the application amount in each of the applicator rolls 110a and 110b. Easy to control. In addition, the paint 125 can be more uniformly applied to the body peripheral surface 210 of the drum can 200 in one rotation of the drum can 200. In addition, since the same degree of paint 125 can be applied to the body peripheral surface 210 from the respective pickup rolls 122-1 and 122-2, the same amount of paint 125 can be obtained in a short time compared to the band coating apparatus 101 in the first embodiment. A degree of painting can be performed.

Embodiment 3 FIG.
In the first and second embodiments described above, a configuration in which there are two applicator rolls 110 is shown. In this Embodiment 3, as shown in FIG. 4, the belt coating apparatus 103 provided with four applicator rolls 110 is shown. Further, by removing one from the four applicator rolls 110, three configurations can be achieved, and furthermore, by combining the first to third embodiments, it is possible to adopt five or more configurations.
In the band coating apparatus 103, two applicator rolls 110 are provided for each of the pickup rolls 122-1 and 122-2 in the band coating apparatus 102 shown in FIG. That is, the applicator rolls 110a and 110b are provided for the pickup roll 122-1, and the applicator rolls 110c and 110d are provided for the pickup roll 122-2. In addition, the diameter of the applicator roll 110 in the third embodiment is smaller than the diameter of the applicator roll 110 in the first and second embodiments due to space constraints. Other configurations are the same as those described in the second embodiment, and detailed descriptions thereof are omitted here.

  By providing three or more applicator rolls 110 as in the third embodiment, the amount of application per applicator roll 110 can be further reduced as compared with the first and second embodiments. Therefore, compared to the first and second embodiments, the occurrence of paint scattering and unevenness can be further suppressed, and the time required for the coating process can be shortened.

  In the band coating method executed by the band coating apparatuses 101 to 103 according to the first to third embodiments described above, in order to perform high-quality and stable coating without causing a decrease in production efficiency compared to the conventional one, a plurality of In accordance with the number of applicator rolls 110, at least the coating film thickness in the belt-like coating 250 and the rotation speed of the drum can 200 are controlled to perform the belt coating.

  In each embodiment described above, the coating material supply apparatus 120 has a configuration including the coating material tank 121, the pickup roll 122, the rotation mechanism 123, and the doctor roll 124. However, the coating material supply apparatus 120 is not limited to this, and may have any structure that can supply the coating material 125 to the peripheral surfaces 111 of the plurality of applicator rolls 110. For example, as a structure in which the paint 125 is directly discharged onto the peripheral surface 111 of each applicator roll 110, or as a configuration other than such direct discharge, the peripheral surface 111 of the applicator roll 110 is made porous and into the applicator roll 110. A structure such as a form in which the paint can be continuously filled and the paint is oozed from the peripheral surface 111 may be adopted.

  Examples 1 to 3 will be described below as examples corresponding to the first to third embodiments described above. Further, Comparative Examples 1 to 4 in the prior art will be described as comparative examples with these Examples.

[Example 1]
One pickup roll made of chrome-plated steel was provided. Two applicator rolls made of tolylbutadiene (NBR) rubber and having a Shore hardness of 60 ° were provided on acrylic, and the paint was applied to the drum can body with a coating amount of 60 mg / dm ² . The peripheral speed of the applicator roll was 120 m / min, the peripheral speed of the drum can was set to 120 m / min in the same direction as the applicator roll, and coating was performed by rotating the drum can twice. Each peripheral speed of the pick-up roll was the same as that of the applicator roll by natural rotation. The paint was an epoxyphenol solvent-based paint, and Daimler Paint Co., Ltd. Hymel Striper White was used without dilution.

[Example 2]
Two pickup rolls made of chrome-plated steel were provided. Two applicator rolls made of urethane rubber and having a Shore hardness of 65 ° were provided, and the paint was applied to the drum can body with a coating amount of 60 mg / dm ² . The peripheral speed of each applicator roll was 120 m / min, the peripheral speed of the drum can was set to 120 m / min in the same direction as the applicator roll, and coating was performed by rotating the drum can twice. The peripheral speed of each pick-up roll was the same as that of the applicator roll at each natural rotation. The paint was an epoxyphenol solvent-based paint, and Daimler Paint Co., Ltd. Hymel Striper White was used without dilution.

[Example 3]
Two pickup rolls made of chrome-plated steel were provided. Four applicator rolls made of urethane rubber and having a Shore hardness of 65 ° were provided. A paint was applied to the drum body with a coating amount of 60 mg / dm ² . The peripheral speed of each applicator roll was 120 m / min, the peripheral speed of the drum can was set to 120 m / min in the same direction as the applicator roll, and coating was performed by rotating the drum can twice. The peripheral speeds of the pickup rolls were the same as the applicator rolls by natural rotation. The paint was an epoxyphenol solvent-based paint, and Daimler Paint Co., Ltd. Hymel Striper White was used without dilution.

[Comparative Example 1]
One pickup roll made of chrome-plated steel was provided. One applicator roll made of acrylonitrile butadiene (NBR) rubber and having a Shore hardness of 60 ° was provided, and the paint was applied to the drum can body with a coating amount of 60 mg / dm ² . The peripheral speed of the applicator roll was 120 m / min, the peripheral speed of the drum can was set to 120 m / min in the same direction as the applicator roll, and coating was performed by rotating the drum can twice. Each peripheral speed of the pick-up roll was the same as that of the applicator roll by natural rotation. The paint was an epoxyphenol solvent-based paint, and Daimler Paint Co., Ltd. Hymel Striper White was used without dilution.

[Comparative Example 2]
One pickup roll made of chrome-plated steel was provided. One applicator roll made of acrylonitrile butadiene (NBR) rubber and having a Shore hardness of 60 ° was provided, and the paint was applied to the drum can body with a coating amount of 60 mg / dm ² . The peripheral speed of the applicator roll was 120 m / min, the peripheral speed of the drum can was set to 120 m / min in the same direction as the applicator roll, and coating was performed by rotating the drum can four times. Each peripheral speed of the pick-up roll was the same as that of the applicator roll by natural rotation. The paint was an epoxyphenol solvent-based paint, and Daimler Paint Co., Ltd. Hymel Striper White was used without dilution.

[Comparative Example 3]
One pickup roll made of chrome-plated steel was provided. One applicator roll made of acrylonitrile butadiene (NBR) rubber and having a Shore hardness of 60 ° was provided, and the paint was applied to the drum can body with a coating amount of 60 mg / dm ² . The peripheral speed of the applicator roll was 60 m / min, the peripheral speed of the drum can was 60 m / min in the same direction as the applicator roll, and coating was performed by rotating the drum can four times. Each peripheral speed of the pick-up roll was the same as that of the applicator roll by natural rotation. The paint was an epoxyphenol solvent-based paint, and Daimler Paint Co., Ltd. Hymel Striper White was used without dilution.

[Comparative Example 4]
One pickup roll made of chrome-plated steel was provided. One applicator roll made of acrylonitrile butadiene (NBR) rubber and having a Shore hardness of 60 ° was provided, and the paint was applied to the drum can body with a coating amount of 60 mg / dm ² . The peripheral speed of the applicator roll was 60 m / min, the peripheral speed of the drum can was 60 m / min in the same direction as the applicator roll, and coating was performed by rotating the drum can 6 times. Each peripheral speed of the pick-up roll was the same as that of the applicator roll by natural rotation. The paint was an epoxyphenol solvent-based paint, and Daimler Paint Co., Ltd. Hymel Striper White was used without dilution.

For each of Examples 1 to 3 and Comparative Examples 1 to 4 as described above, comparison of each configuration and evaluation is shown in Table 1 and Table 2, respectively. Here, the “coating amount” shown in Table 1 is the final coating amount after drying. Moreover, each symbol shown in each evaluation item shown in Table 2 has the following meaning.
Coating efficiency ○: No particular problem occurred in work △: Although it was delayed, it was possible ×: Efficiency with previous and subsequent processes did not match and was not in the practical range

Unevenness ○: Good △: Slightly recognized ×: Not practical

Scale ○: Good △: Slightly recognized ×: Many exposed parts of the base are not practical

Occurrence of band edge part ○: No particular problem in work △: Slightly recognized ×: Not practical

Band edge sagging ○: Good △: Slightly recognized ×: Not practical

Band edge blurring ○: Good △: Slightly recognized but practical range ×: Many exposed areas of base coating are not practical range

Overall evaluation ○: Good ×: Not practical

  INDUSTRIAL APPLICABILITY The present invention is applicable to a belt coating apparatus and method for performing strip coating on a metal plate, particularly a cylindrical body of a metal can, and a drum can coated with the strip coating apparatus and method.

101-103 ... belt coating device,
110 ... applicator roll, 120 ... paint supply device, 121 ... paint tank,
122 ... Pickup roll, 123 ... Rotation mechanism, 130 ... Can support mechanism,
200 ... drum can, 202 ... axial direction, 210 ... trunk circumference, 250 ... painting.

Claims (8)

A belt coating apparatus for performing strip-like coating (250) on the drum peripheral surface (210) along the drum peripheral surface (210),
A can support mechanism (130) for rotatably supporting the drum can in a direction (202) around the axis of the drum can central axis (201);
A plurality of roll-shaped applicator rolls (110) rotating in contact with the body peripheral surface;
A coating material supply device (120) for supplying a coating material for belt-like coating to the peripheral surface (111) in each of the applicator rolls,
Each of the applicator rolls is parallel to the drum can center axis and oriented along the drum can center axis, and a plurality of applicator rolls are arranged in the direction around the axis. A belt coating device that performs strip-like coating.   The belt coating apparatus according to claim 1, wherein a peripheral surface of the applicator roll is made of a rubber material, and the rubber material has a Shore hardness of 40 ° to 75 °.   The paint supply device has a paint tank (121) that stores the paint (125) for the belt-like coating, a roll shape and a roll peripheral surface (122a) that contacts the peripheral surface of each applicator roll, and The pick-up roll (122) disposed by immersing the roll peripheral surface in the paint in the paint tank, and a rotation mechanism (123) for rotating the pick-up roll in the direction around the central axis, The belt coating apparatus according to claim 1 or 2, wherein the coating material is attached to the circumferential surface of the roll by rotation, and the adhered coating material is transferred to the circumferential surface of the applicator roll.   The belt coating apparatus according to claim 3, wherein the number of the pickup rolls is the same as the number of the applicator rolls.   The said coating material supply apparatus further has a coating material adjustment member (124) arrange | positioned in contact with the roll surrounding surface of the said pick-up roll, and adjusting the amount of coating materials transferred to the surrounding surface of the said applicator roll. Belt coating equipment.   Each said applicator roll is a belt coating apparatus in any one of Claim 1 to 5 which transfers a coating material to the said trunk | drum peripheral surface in the same direction as the said shaft periphery direction of a drum can. A strip coating method for performing strip-like coating (250) on the drum peripheral surface (210) along the drum peripheral surface (210) of the drum can (200) using the belt coating device according to claim 1,
A strip coating method comprising performing strip coating by controlling the coating thickness and drum rotation speed in strip coating according to the number of applicator rolls.   A strip-shaped coating is performed along the drum peripheral surface by the strip coating apparatus according to any one of claims 1 to 6 or by the strip coating method according to claim 7. Drum.

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