JP2024063292A - Coating Equipment - Google Patents

Abstract

[Problem] To provide a coating device capable of coating a fluid material on the outer peripheral surface of a specific portion of a tubular coating object. [Solution] The coating device comprises a printing roll 5 having the fluid material coated on its outer peripheral surface, a transfer roll 6 that transfers the fluid material coated on the outer peripheral surface of the printing roll 5 to the outer peripheral surface, and a rotation device 7 that rotates the transfer roll 6 along the outer periphery of the specific portion of the tubular coating object 30, thereby transferring the fluid material transferred to the outer peripheral surface of the transfer roll 6 to the outer peripheral surface of the specific portion. [Selected Figure] Figure 1

Description

The present invention relates to a coating device that applies a fluid material to a substrate.

Patent document 1 discloses a coating device that applies a film of a fluid material (glue) to both sides of a plate-shaped object to be coated. In this document, the amount of fluid material applied is adjusted by adjusting the axial distance between the coating roll and the doctor roll according to the viscosity of the fluid material.

JP 2019-25371 A

For example, after a fluid material (coating agent) is applied to the entire circumference of the end of a pipe used in a car air conditioner, a hose is connected to the end, and the two are bonded together with the fluid material. Conventionally, the fluid material is applied to the end of a pipe by putting a cap on the very end of the pipe, including the end itself, and then immersing the end of the pipe in a container containing the fluid material. However, it is desirable to use an application device that can apply the fluid material to the outer surface of a specific portion of a tubular object such as a pipe.

The object of the present invention is to provide an application device capable of applying a fluid material to the outer peripheral surface of a specific portion of a tubular object to be coated.

The present invention is characterized by comprising a printing roll having a fluid material applied to its outer peripheral surface, a transfer roll that transfers the fluid material applied to the outer peripheral surface of the printing roll to the outer peripheral surface, and a rotating device that rotates the transfer roll along the outer periphery of a specific portion of a tubular workpiece, thereby transferring the fluid material transferred to the outer peripheral surface of the transfer roll to the outer peripheral surface of the specific portion.

According to the present invention, the transfer roll is rotated along the outer periphery of the specific portion of the tubular workpiece, and the fluid material transferred to the outer periphery of the transfer roll is transferred to the outer periphery of the specific portion of the workpiece. This allows the fluid material to be applied to the outer periphery of the specific portion of the tubular workpiece. In addition, by transferring the fluid material from the outer periphery of the printing roll to the outer periphery of the transfer roll, the amount of fluid material to be applied to the specific portion of the workpiece can be held on the outer periphery of the transfer roll. Therefore, by subsequently transferring the fluid material from the outer periphery of the transfer roll to the outer periphery of the specific portion of the workpiece, the desired amount of fluid material can be applied to the outer periphery of the specific portion of the workpiece.

FIG. 2 is a configuration diagram of a coating device. FIG.

The following describes a preferred embodiment of the present invention with reference to the drawings.

(Configuration of Coating Apparatus)
The coating device in this embodiment applies a flowable material to an object to be coated. In this embodiment, the flowable material is a coating agent (adhesive), but the flowable material is not limited to this and may be paint or the like. The object to be coated in this embodiment is tubular. The object to be coated in this embodiment is a pipe used in a car air conditioner or the like, but is not limited to this.

As shown in FIG. 1, which is a configuration diagram of the coating device 1, the coating device 1 has a tank 2, a tray 3, a pump 4, a printing roll 5, a transfer roll 6, and a rotating device 7.

The tank 2 stores the fluid material. The tray 3 is disposed below the printing roll 5 and stores the fluid material. The fluid material in the tray 3 is returned to the tank 2 through the pipe 15. The pump 4 supplies the fluid material from the tank 2 to the tray 3. The amount of fluid material in the tray 3 is maintained at a predetermined amount by balancing the amount of fluid material supplied to the tray 3 by the pump 4 and the amount of fluid material discharged from the tray 3.

The printing roll 5 is made of metal. The printing roll 5 is constantly rotated clockwise in the figure. The axial direction of the printing roll 5 is horizontal. The lower part of the printing roll 5 is immersed in the fluid material in the tray 3. As the printing roll 5 constantly rotates with its lower part immersed in the fluid material, the fluid material is applied to the outer peripheral surface of the printing roll 5.

The transfer roll 6 is made of silicon and has a smaller diameter than the printing roll 5. The axial direction of the transfer roll 6 is parallel to the axial direction of the printing roll 5. The transfer roll 6 is moved horizontally in the left-right direction in the figure between the printing roll 5 and the workpiece 30. In this embodiment, the device that moves the transfer roll 6 horizontally is the rotation device 7, but it may be a device other than the rotation device 7. The outer circumferential surface of the transfer roll 6 is abutted against the outer circumferential surface of the printing roll 5, so that the transfer roll 6 rotates in response to the rotation of the printing roll 5. As a result, the fluid material applied to the outer circumferential surface of the printing roll 5 is transferred to the outer circumferential surface of the transfer roll 6. At this time, the transfer roll 6 rotates multiple times.

After the fluid material is transferred to the outer peripheral surface of the transfer roll 6, the rotating device 7 moves the transfer roll 6 toward the workpiece 30, and brings the outer peripheral surface of the transfer roll 6 into contact with the outer peripheral surface of a specific portion of the workpiece 30. The longitudinal direction of the specific portion of the workpiece 30 is parallel to the axial direction of the transfer roll 6. In this embodiment, the specific portion of the workpiece 30 is the end of the workpiece 30, but is not limited thereto.

The rotating device 7 rotates the transfer roll 6 along the outer periphery of the specific portion of the workpiece 30 while maintaining the transfer roll 6 in contact with the specific portion of the workpiece 30. At this time, the end of the workpiece 30 is inserted and fixed in the jig of the rotating device 7, and does not rotate. With the outer periphery of the transfer roll 6 in contact with the outer periphery of the specific portion of the workpiece 30, the transfer roll 6 rotates around the workpiece 30. By rotating the transfer roll 6 along the outer periphery of the specific portion of the workpiece 30, the fluid material transferred to the outer periphery of the transfer roll 6 is transferred to the outer periphery of the specific portion of the workpiece 30. At this time, the transfer roll 6 is rotated multiple times around the workpiece 30. As a result, the fluid material is applied to the outer periphery of the specific portion of the workpiece 30 with a uniform thickness.

Here, multiple grooves are formed in a specific portion of the workpiece 30. These grooves improve the fit with a hose that is connected to the specific portion of the workpiece 30. The transfer roll 6 is made of silicon and deforms to fit inside the grooves in the specific portion of the workpiece 30, so that the fluid material transferred to the outer peripheral surface of the transfer roll 6 is also suitably transferred to the inside of the grooves in the specific portion of the workpiece 30.

In this way, the transfer roll 6 is rotated along the outer periphery of the specific portion of the tubular workpiece 30, and the fluid material transferred to the outer periphery of the transfer roll 6 is transferred to the outer periphery of the specific portion of the workpiece 30. This allows the fluid material to be applied to the outer periphery of the specific portion of the tubular workpiece 30. In addition, by transferring the fluid material from the outer periphery of the printing roll 5 to the outer periphery of the transfer roll 6, the amount of fluid material to be applied to the specific portion of the workpiece 30 can be held on the outer periphery of the transfer roll 6. Therefore, by subsequently transferring the fluid material from the outer periphery of the transfer roll 6 to the outer periphery of the specific portion of the workpiece 30, the desired amount of fluid material can be applied to the outer periphery of the specific portion of the workpiece 30.

As shown in FIG. 1, the coating device 1 has a wiper 8. The wiper 8 moves forward and backward relative to the printing roll 5. The wiper 8 is in contact with the outer peripheral surface of the printing roll 5 over the entire longitudinal length of the printing roll 5.

As shown in FIG. 2, which is a top view of the printing roll 5 and the transfer roll 6, a groove 5a is formed on the outer circumferential surface of the printing roll 5 over the entire circumference. The groove 5a is filled with a fluid material. When the fluid material applied to the outer circumferential surface of the printing roll 5 is transferred to the outer circumferential surface of the transfer roll 6, the transfer roll 6 is abutted against the groove 5a. The wiper 8 is abutted against the outer circumferential surface of the printing roll 5 before the transfer roll 6 is abutted against the groove 5a. As a result, the fluid material other than the fluid material in the groove 5a is wiped off from the outer circumferential surface of the printing roll 5. Therefore, only the fluid material held in the groove 5a is transferred to the outer circumferential surface of the transfer roll 6. The transfer roll 6 is made of silicon and deforms to fit inside the groove 5a, so that the fluid material in the groove 5a is suitably transferred to the outer circumferential surface of the transfer roll 6.

The width of the groove 5a in the axial direction of the printing roll 5 is shorter than the length of the transfer roll 6 in the axial direction. The depth of the groove 5a is set so that the amount of fluid material to be applied to a specific portion of the workpiece 30 is held in the groove 5a. Therefore, when the fluid material other than the fluid material in the groove 5a of the printing roll 5 is wiped off from the outer circumferential surface of the printing roll 5 by the wiper 8, the amount of fluid material to be applied to a specific portion of the workpiece 30 is held in the groove 5a of the printing roll 5. As a result, by abutting the transfer roll 6 against the groove 5a, the amount of fluid material to be applied to a specific portion of the workpiece 30 can be transferred to the outer circumferential surface of the transfer roll 6.

Returning to FIG. 1, the coating device 1 has a flowmeter 9, a solvent tank 10, and a controller 11. The flowmeter 9 is provided in a pipe 16 through which the fluid material supplied from the tank 2 to the tray 3 passes, and detects the flow rate of the fluid material supplied from the tank 2 to the tray 3. The solvent tank 10 stores a solvent and is capable of supplying the solvent to the tank 2. Here, the solvent stored in the solvent tank 10 is the same type as the solvent contained in the fluid material. The controller 11 causes the solvent to be supplied from the solvent tank 10 to the tank 2 according to the flow rate detected by the flowmeter 9.

As the solvent evaporates from the fluid material, the specific gravity of the fluid material increases and the flow rate of the fluid material decreases. When the flow rate of the fluid material decreases, the specific gravity of the fluid material can be decreased and the flow rate of the fluid material can be increased by supplying solvent from the solvent tank 10 to tank 2.

The coating device 1 also has an agitating member 12. The agitating member 12 is disposed above the tank 2. The agitating member 12 moves up and down relative to the fluid material in the tank 2. The agitating member 12 is capable of agitating the inside of the tank 2, and is, for example, a propeller. When the solvent is supplied from the solvent tank 10 to the inside of the tank 2, the controller 11 immerses the agitating member 12 in the fluid material in the tank 2 and causes the agitating member 12 to agitate the inside of the tank 2. This makes it possible to suitably lower the specific gravity of the fluid material in the tank 2.

The controller 11 also controls the operation of the rotation device 7 and the wiper 8.

(Operation of Coating Device)
Next, a description will be given of the operation of the coating device 1. Here, the pump 4 continues to supply the fluid material from the tank 2 to the tray 3, and the printing roll 5 continues to rotate with its lower portion immersed in the fluid material in the tray 3.

First, an operator inserts the end of the workpiece 30 into the jig of the rotating device 7 and fixes it. Next, the controller 11 moves the transfer roll 6 toward the printing roll 5. The controller 11 abuts the wiper 8 against the outer peripheral surface of the printing roll 5. This wipes away any fluid material other than the fluid material in the groove 5a of the printing roll 5 from the outer peripheral surface of the printing roll 5. In this state, the transfer roll 6 abuts against the groove 5a. This transfers the fluid material held in the groove 5a to the outer peripheral surface of the transfer roll 6.

Next, the controller 11 moves the transfer roll 6 toward the workpiece 30, and then the transfer roll 6 rotates around the workpiece 30. As a result, the fluid material transferred to the outer peripheral surface of the transfer roll 6 is transferred to the outer peripheral surface of a specific portion of the workpiece 30. The worker then removes the workpiece 30 from the jig of the rotating device 7.

While the above operation is being repeated, the flow rate of the fluid material being supplied from the tank 2 to the tray 3 is detected by the flow meter 9. According to the flow rate detected by the flow meter 9, the controller 11 supplies the solvent from the solvent tank 10 into the tank 2. After the solvent has been supplied into the tank 2, the controller 11 immerses the stirring member 12 in the fluid material in the tank 2, and the stirring member 12 stirs the inside of the tank 2.

(effect)
As described above, according to the coating device 1 of this embodiment, as shown in FIG. 1, the transfer roll 6 is rotated along the outer periphery of a specific portion of the tubular workpiece 30, and the fluid material transferred to the outer periphery of the transfer roll 6 is transferred to the outer periphery of the specific portion of the workpiece 30. This allows the fluid material to be applied to the outer periphery of the specific portion of the tubular workpiece 30. In addition, by transferring the fluid material from the outer periphery of the printing roll 5 to the outer periphery of the transfer roll 6, the amount of fluid material to be applied to the specific portion of the workpiece 30 can be held on the outer periphery of the transfer roll 6. Therefore, by subsequently transferring the fluid material from the outer periphery of the transfer roll 6 to the outer periphery of the specific portion of the workpiece 30, the desired amount of fluid material can be applied to the outer periphery of the specific portion of the workpiece 30.

As shown in FIG. 2, when the transfer roll 6 contacts the groove 5a, the fluid material other than the fluid material in the groove 5a of the printing roll 5 is wiped off from the outer circumferential surface of the printing roll 5. For example, an amount of fluid material to be applied to a specific portion of the workpiece 30 is held in the groove 5a of the printing roll 5. In this case, by contacting the transfer roll 6 with the groove 5a, the amount of fluid material to be applied to a specific portion of the workpiece 30 can be transferred to the outer circumferential surface of the transfer roll 6.

As shown in FIG. 1, the solvent is supplied from the solvent tank 10 to the tank 2 according to the flow rate of the fluid material detected by the flow meter 9. As the solvent evaporates from the fluid material, the specific gravity of the fluid material increases and the flow rate of the fluid material decreases. When the flow rate of the fluid material decreases, the specific gravity of the fluid material can be decreased and the flow rate of the fluid material can be increased by supplying the solvent from the solvent tank 10 to the tank 2.

As shown in FIG. 1, when the solvent is supplied from the solvent tank 10 into the tank 2, the inside of the tank 2 is stirred by the stirring member 12. This makes it possible to suitably lower the specific gravity of the fluid material in the tank 2.

Although the embodiments of the present invention have been described above, they are merely illustrative examples and do not limit the present invention, and the specific configurations and other aspects can be modified as appropriate. Furthermore, the actions and effects described in the embodiments of the invention are merely a list of the most suitable actions and effects resulting from the present invention, and the actions and effects of the present invention are not limited to those described in the embodiments of the present invention.

REFERENCE SIGNS LIST 1 Coating device 2 Tank 3 Tray 4 Pump 5 Printing roll 5a Groove 6 Transfer roll 7 Rotating device 8 Wiper 9 Flowmeter 10 Solvent tank 11 Controller 12 Stirring member 15, 16 Pipe 30 Coating object

Claims (4)

A printing roll having a fluid material applied to its outer circumferential surface;
a transfer roll to which the fluid material applied to the outer peripheral surface of the printing roll is transferred;
a rotating device that rotates the transfer roll along the outer periphery of a specific portion of a tubular object to be coated, thereby transferring the fluid material transferred to the outer periphery surface of the transfer roll to the outer periphery surface of the specific portion;
A coating apparatus comprising: A groove is formed on the outer peripheral surface of the printing roll over the entire circumference,
When the fluid material applied to the outer peripheral surface of the printing roll is transferred to the outer peripheral surface of the transfer roll, the transfer roll is brought into contact with the groove,
2. The coating device according to claim 1, further comprising a wiper that wipes away the fluid material other than the fluid material in the groove from the outer peripheral surface of the printing roll when the transfer roll is brought into contact with the groove. The axial direction of the printing roll is horizontal,
A tank for storing the fluid material;
a tray disposed below the printing roll for storing the fluid material in which the lower portion of the printing roll is immersed;
a pump for supplying the flowable material from the tank to the tray;
a flow meter for detecting a flow rate of the flowable material supplied from the tank to the tray;
a solvent tank capable of supplying a solvent into the tank;
a controller that supplies the solvent from the solvent tank into the tank in accordance with the flow rate detected by the flow meter;
The coating device according to claim 1 or 2, further comprising: A stirring member capable of stirring the inside of the tank,
4. The coating apparatus according to claim 3, wherein the controller causes the stirring member to stir the inside of the tank when the solvent is supplied from the solvent tank into the tank.

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