JP2000051764A - Pattern coating system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent ununiformity of a pattern by suppressing the change of the flow rate ratio with time to make the coating material stable supplied by instantaneously detecting the flow rate of a base coating material and a marker coating material to find the mixing ratio and controlling the pressure of one of the coating materials. SOLUTION: The pattern coating system is provided with a base supply line B composed of a base toning can 6, a supply pump 7, a base pressure tank 8 and a maker supply line C composed of a marker toning can 14, a supply pump 15 and a marker pressure tank 16, and each coating material is supplied to a die coater coating device E through liquid supply pipes 10, 18. In such a case, the pressure necessary to supply each coating material to the coating device E is formed in a liquid supply power line A and air is fed to each supply line B, C through air feed lines 4, 5. And, a liquid supply control line D is provided to detect the flow rate of each coating material and to obtain the flow rate ratio and the feed air to the marker supply line C is controlled by a controller 23 based on the resultant flow rate ratio to continuously keep the flow rate ratio at the proper value.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating system for continuously forming a pattern with a stable and improved reproducibility on the surface of a substrate (work) such as a long thin metal plate or a plastic film. Coating method).

[0002]

2. Description of the Related Art Conventionally, using a die coater coating apparatus,
As a coating system for continuously forming a pattern such as a band, a streak, and a stripe on a long base material with two types of paints, Japanese Patent Publication No.
There is a method for forming a coating layer described in JP-A-106.

That is, in this coating method, as a control method for supplying the paint into the die coater coating apparatus, two kinds of paint are supplied at the same pressure, and a quantitative difference (flow ratio) between the two paints is supplied. Is determined by the difference between the orifices to be used (ie, the size of the diameter of the supply pipe).

[0004] Further, in the middle of two paint supply pipes, 3
There is described a method of controlling the supply amount by electrically turning on / off these two on-off valves.

[0005]

However, in the above-mentioned apparatus system, it is necessary to replace the supply pipes having different diameters in order to greatly change the value of the flow ratio of the two paints, which increases labor and cost. Was to do. In addition, in the method of controlling the supply amount by electrically turning on and off the on-off valve, it is a rough adjustment only when the valve is turned on and off, and it is possible to stably supply paint with a constant flow ratio. Was difficult.

[0006]

SUMMARY OF THE INVENTION In order to solve such problems, the present invention provides a method for continuously supplying a base paint and one or more marker paints under pressure into a die coater coating apparatus. And a paint system that measures the pressure of at least either the base paint or the marker paint so that the flow rate becomes constant by measuring the flow rate of the marker paint and the flow rate of the marker paint, respectively. It is an object of the present invention to provide a pattern coating system that can easily and stably supply a coating material and can significantly improve the reproducibility of a pattern for each production lot.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A typical embodiment of a pattern coating system according to the present invention will be described below in detail with reference to the drawings. FIG. 1 is an explanatory view schematically showing a pattern coating system according to the present invention. As roughly divided by a dashed line, a liquid feeding power system A, a base feeding system B, a marker feeding system C, and a liquid feeding adjusting system D are shown. And a die coater coating apparatus E.

As shown in an enlarged manner in FIG. 2, the liquid feeding power system A is a device for forming a pressure for supplying a base paint α and a marker paint β to a die coater coating device E, which will be described later. The air compressor 1 and the pressure setting device 2 are connected by an air supply pipe 3.

The air compressor 1 produces compressed air for feeding each paint under pressure. The overpressure setter 2 adjusts the pressure of the compressed air formed by the air compressor 1 to a constant value so as to be an arbitrary value.
To the base supply system B, and the liquid feed adjustment system D by the air supply pipe 5.
The air is supplied to the marker supply system C via the.

Of course, the pressure of the compressed air sent from the overpressure setting device 2 through the air supply pipe 4 and the air supply pipe 5 can be set to different arbitrary values.

The base supply system B is composed of a base toning can 6, a supply pump 7, and a base pressurizing tank 8, as shown in FIG. A base paint α is previously stored in the base toning can 6, and is supplied into the base pressurized tank 8 via the liquid feed pipe 9 by the supply pump 7.

An air supply pipe 4 is provided in the base pressurized tank 8.
Is supplied with compressed air, and is thereby kept under a constant pressure. Then, the base paint α is supplied to a die coater coating apparatus E, which will be described later, at a constant pressure and a constant flow rate through the liquid feed pipe 10.

A liquid level control sensor 11 is installed in the base pressurized tank 8 to prevent the liquid from running out. It is preferable to adjust the supply amount of the supply pump 7 via the communication means 12 such as a lead wire or infrared ray so as to be at the height.

Further, a stirrer 13 with a screw is installed in the base pressurizing tank 8 so that the components of the base paint α (resin component, pigment component, catalyst such as thinner, diluting component, etc.) are further increased. It is more preferable to consider uniformity.

The marker supply system C is composed of a marker toning can 14, a supply pump 15, and a marker pressurizing tank 16, as shown in FIG. A marker paint β is previously stored in the marker toning can 14, and is supplied into the marker pressurizing tank 16 by the supply pump 15 via the liquid feed pipe 17.

Compressed air is supplied into the marker pressurized tank 16 by the air supply pipe 5 via a pressure controller 23 described later, and is thereby kept under a constant pressure. I have. Then, the marker paint β is supplied to a die coater coating apparatus E, which will be described later, at a constant pressure and a constant flow rate through the liquid feed pipe 18.

A liquid level control sensor 11 is provided in the marker pressurizing tank 16 to prevent the liquid from running out, similarly to the base pressurizing tank 8.
It is preferable to adjust the supply amount of the supply pump 15 via the communication means 12 such as a lead wire or infrared ray so that the marker paint β is always at a certain level of the liquid level in the inside.

Further, in the marker pressurizing tank 16,
By installing a stirrer 13 with a screw, the components of the marker paint β (resin component, pigment component, catalyst such as thinner,
It is more preferable if consideration is given so that the diluent components and the solvent are more uniform.

As shown in an enlarged manner in FIG. 5, the liquid feed adjusting system D includes a base flow rate detector 19, a marker flow rate detector 20,
It is formed by a flow ratio detector 21, an electropneumatic converter 22, and a pressure increasing / decreasing controller 23.

The base flow rate detector 19 is provided in the middle of the liquid feed pipe 10 which is a supply path from the base pressurized tank 8 to the die coater coating apparatus E. (A cross-sectional area per time) is measured and detected.

The marker flow rate detector 20 is provided in the middle of the liquid supply pipe 18 which is a supply path from the marker pressurizing tank 16 to the die coater coating apparatus E. (A cross-sectional area per time) is measured and detected.

The flow ratio detector 21 is a base flow detector 1
9 and marker flow rate detector 20 and communication means 1 respectively
2 to calculate and detect the flow ratio between the base paint α and the marker paint β.

The electropneumatic converter 22 controls the flow rate ratio information (control voltage) sent from the flow rate ratio detector 21 via the communication means 12 to the pressure controller 23 via the transmission means 12. It is converted into air pressure information and transmitted.

The pressurizing / depressurizing controller is arranged in the middle of the air supply pipe 5 connecting the overpressure setter 2 and the marker pressurizing tank 16, and based on the information sent from the electropneumatic converter 22, the air pressure Is gradually increased or decreased over time, so that the flow rate ratio between the base paint α and the marker paint β always becomes a predetermined value (constant value).

As described above, the flow ratio of the base paint α and the marker paint β supplied to the die coater coating apparatus E can be always kept constant, and a stable pattern can be applied. The reproducibility of the pattern is also greatly improved.

The die coater coating apparatus E comprises a substrate (work) 24, a backup roll 25, and a die coater 26, as shown in FIG.

The base material 24 is made of a long and continuous thin metal plate, plastic film, or the like, and has an arbitrary width and a thickness of about 0.1 to 1.5 mm. It is a body to be painted on which a pattern is painted by the painting device E.

The backup roll 25 rotates in the direction indicated by the arrow in the figure, and comes into close contact with the back surface of the substrate 24 to move the substrate 24 to the next step (drying, baking, cutting, etc. (not shown)). In addition, a tension is applied to the base material 24 so that the base material 24 is stably moved so as not to meander or bend during the conveyance.

The die coater 26 is fixedly installed at an arbitrary position on the outer circumference of a circle where the base material 24 and the backup roll 25 are in contact with each other. It is to paint the pattern.

The shape of the die coater 26 is shown in FIG.
As shown in the perspective views of (a) and (b) and the cross-sectional view of FIG. 9, a substantially rectangular column die 27, a head 28 facing the base material 24 on one side surface of the die 27, and a substantially central portion of the head 28. A thin cavity 29 having a semicircular cross section is formed in the portion.

The lower end of the head 28 is provided with a notched and sharp edge 30. Die 27
The mixing chamber 31 is provided so as to be parallel to the cavity 29 therein, and a first pipe 32 to which the liquid feed pipe 10 for supplying the base paint α is connected is installed at the back of the mixing chamber 31. In the middle of the first pipe 32, a second pipe 33 to which the liquid feed pipe 18 for supplying the marker paint β is connected is installed.

The cavity 29 and the mixing chamber 31 are connected by a plurality of connection pipes 34, and a valve 35 that can be opened and closed is provided in the middle of each connection pipe 34.

As a mechanism for forming a pattern on the surface of the base material 24, as shown in FIGS.
When the base paint α is supplied from the second pipe 33 and the marker paints β of different colors are respectively supplied from the second pipe 33, the base paint α and the marker paint β are filled into the mixing chamber 31 and start to rotate. It is in a state where they are half mixed instead of
The rotation is further applied in the cavity 29, and
By moving the surface of No. 4, a continuous band, streak, or stripe pattern is formed on the surface of the base material 24.

The base paint α and the marker paint β are made of one or more paints such as acrylic paint, urethane paint, epoxy paint, polyester paint and fluororesin paint, and have at least different colors. Of course, the base paint α and the marker paint β may have different properties themselves. Further, one of the base paint α and the marker paint β may be supplied as only various pigments such as ink.

Further, a solvent which promotes mixing by rotation of the paint is mixed in one or both of the base paint α and the marker paint β. The solvent is previously mixed before reaching the die coater coating apparatus E, and is composed of at least one of alcohols, ketones, esters, glycol ethers, ethers, and hydrocarbons. is there.

The width of the band, streak, and stripe pattern is determined according to the stage at which the base paint α and the marker paint β are gradually mixed.
The portion of the cavity 29 near the portion where the connection pipe 34 is connected is wide, and becomes narrower as the distance increases.

Note that, depending on the value of the flow ratio of the base paint α and the marker paint β to be supplied, and the amount ratio of the solvent, the band,
The width of stripes and stripes, the interval between appearances, and the like change, and this ratio can be arbitrarily selected.

Further, as shown in FIG.
6, the edge 30 formed on the base material 24 as shown in FIG.
Is provided with a distance (clearance) of ΔT from the surface of the coating film, and serves to improve the running of the paint and keep the thickness of the coating film constant.

Furthermore, the width of the cavity 29 is made wider than the width of the base material 24 to coat the entire surface of the base material 24 at one time. Is narrower than the width of the substrate 24, and can be arbitrarily performed.

The valve 35 is necessary for changing the pattern by adjusting the amount of supply from each connection pipe 34 when filling the cavity 29 with the base paint α and the marker paint β. And more specifically, a rotary air valve or the like.

Further, although not shown, two or more marker paints can be supplied to one base paint α to perform painting in which three or more different paints are mixed.

[0042]

Other Embodiments A typical embodiment of the pattern coating system according to the present invention has been described above, and FIGS.
6 or a pattern coating system.

That is, FIG. 10 shows a modification of the die coater 26. As shown in FIG. 10 (a), an elastic body 36 for adjusting the width of the cavity 29 having a width up to the vicinity of both ends of the head 28 is provided by a cabinet. FIG.
As shown in (b), when the width of the cavity 29 is adjusted by the adjustment rod 37 connected to the elastic body 36 and the width to be coated is arbitrarily changed in response to the change in the width of the base material 24, It is valid.

FIGS. 11 and 12 show a modified example of the die coater coating apparatus E. FIG.
FIG. 11B shows an example in which the base material 24 supported on the substrate 2 is directly coated with the die coater 26.
4 shows an example of coating. The transfer roll 3
As the rotation direction 8, the paint can be rotated by arbitrarily rotating either left or right in the figure.

FIG. 12 shows the transfer roll 38 and the die coater 2.
6 shows an example of a die coater coating apparatus E in which a loading paint roll 39 is interposed between the coating material 6 and a solvent paint used to evaporate a solvent used for improving the mixing of the base paint α and the marker paint β. The process can be lengthened, which is effective in simultaneously mixing different types of paints and preventing explosion of the coating film during baking.

In the pattern coating system shown in FIG. 13, in the liquid feeding adjusting system D, the pressurizing / depressurizing controller 23 is installed on the side of the base paint α to adjust the flow rate of the base paint α with respect to the flow rate of the marker paint β. This is an example in which the ratio is kept constant.

In the pattern coating system shown in FIG. 14, in the liquid supply adjusting system D, the pressurizing and depressurizing controllers 23 are installed on both the base paint α side and the marker paint β side, and more precise control and adjustment of both paints are performed. This is an example in which the supply is performed with a constant flow ratio.

The pattern coating system shown in FIG. 15 includes a base pressurizing tank 8, a marker pressurizing tank 16, a liquid feed pipe 10,
At least one of the liquid feed pipe 18 and the die coater 26 has a temperature control device F
It is an example in which is installed. The temperature control device F performs heating and cooling in an atmosphere state or the like, and is useful for controlling the viscosity of the base paint α and the marker paint β at a liquid temperature without using a diluting solvent such as a thinner. That is, the dilution ratio of each paint can be fixed, and the ratio of the solid residue of the paint can be easily calculated.

The pattern coating system shown in FIG. 16 shows an example in which the liquid feed power system A is replaced with the air compressor 1 and a liquid feed pump 40 is used. The liquid feed pump 40 includes a diaphragm pump, an electric pump, or the like. In this case, it is necessary to reduce variations in the paint flow rate due to pulsation of the pump.

[0050]

As described above, according to the pattern coating system of the present invention, the flow rates of the base paint and the marker paint are respectively instantaneously detected, and the mixing ratio is found.
A constant flow ratio can be obtained by adjusting at least one of the pressures for supplying the base paint or the marker paint, so that the temporal change in the flow ratio can be eliminated, and the paint can be supplied stably, and pattern unevenness can be achieved. There is no (color dispersion), and the reproducibility of the pattern for each production lot can be significantly improved. There are features and effects such as.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a typical example of a pattern coating system according to the present invention.

FIG. 2 is an explanatory diagram showing a typical example of a liquid feeding power system constituting the pattern coating system according to the present invention.

FIG. 3 is an explanatory diagram showing a typical example of a base supply system constituting the pattern coating system according to the present invention.

FIG. 4 is an explanatory diagram showing a representative example of a marker supply system that constitutes the pattern coating system according to the present invention.

FIG. 5 is an explanatory diagram showing a typical example of a liquid feed adjusting system constituting the pattern coating system according to the present invention.

FIG. 6 is an explanatory view showing a typical example of a die coater coating apparatus constituting the pattern coating system according to the present invention.

FIG. 7 is an explanatory view showing a typical example of a die coater coating apparatus constituting the pattern coating system according to the present invention.

FIG. 8 is an explanatory view showing a typical example of a die coater constituting the pattern coating system according to the present invention.

FIG. 9 is an explanatory view showing a typical example of a die coater constituting the pattern coating system according to the present invention.

FIG. 10 is an explanatory view showing another example of a die coater constituting the pattern coating system according to the present invention.

FIG. 11 is an explanatory view showing another example of the die coater coating apparatus constituting the pattern coating system according to the present invention.

FIG. 12 is an explanatory view showing another example of the die coater coating apparatus constituting the pattern coating system according to the present invention.

FIG. 13 is an explanatory view showing another example of the pattern coating system according to the present invention.

FIG. 14 is an explanatory view showing another example of the pattern coating system according to the present invention.

FIG. 15 is an explanatory view showing another example of the pattern coating system according to the present invention.

FIG. 16 is an explanatory view showing another example of the pattern coating system according to the present invention.

[Explanation of symbols]

 α Base paint β Marker paint A Liquid supply power system B Base supply system C Marker supply system D Liquid supply adjustment system E Die coater coating device F Temperature controller 1 Air compressor 2 Overpressure setter 3 Air supply pipe 4 Air supply pipe 5 Air supply pipe 6 Base Toning Can 7 Supply Pump 8 Base Pressurized Tank 9 Liquid Feeding Pipe 10 Liquid Feeding Pipe 11 Liquid Level Control Sensor 12 Communication Means 13 Stirrer 14 Marker Coloring Can 15 Supply Pump 16 Marker Pressurized Tank 17 Liquid Delivery Pipe 18 Liquid sending pipe 19 Base flow rate detector 20 Marker flow rate detector 21 Flow rate ratio detector 22 Electro-pneumatic converter 23 Compressor / decompressor controller 24 Base material 25 Backup roll 26 Die coater 27 Dice 28 Head 29 Cavity 30 Edge 31 Mixing chamber 32 first pipe 33 second pipe 34 connection pipe 35 valve 36 elastic body 37 Adjusting rod 38 Transfer roll 39 Paint roll 40 Liquid feed pump

Claims (1)

[Claims] 1. A coating system for forming a pattern on a surface of a long and thin plate-like base material by using a die coater coating apparatus, wherein a base paint and one or more marker paints are placed under pressure in the die coater coating apparatus. The method is characterized in that at least one of the supply of the base paint or the marker paint is adjusted so that the flow rate of the base paint and the marker paint is constant by measuring the flow rates of the base paint and the marker paint, respectively. Pattern painting system.