JPH11138080A - Coating equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coating equipment for carrying out the stabilized multicolor coating while absorbing the errors of the base width generated at the time of manufacturing and coating a base. SOLUTION: A coating equipment α is provided with a coating channel 3 of optional section set crossing on the surface of a base 13, a plurality of pipes 4 and 5 connected with the coating channel 3, a die coater D with a variable bar 6 for varying the length of the coating channel on both ends of the coating channel and a sensor E disposed on the front or the rear of the die coater D and sensing the positions on both side ends of the base β, and respective different kinds of coating materials A and B are fed continuously into the coating channel 3 by pipes 4 and 5, and the base β is moved in the longitudinal direction and the variable bar 6 is moved correspondingly to the positions of both side ends of the base βsensed by the sensor E, and the coating conforming to the base width is carried out continuously while varying the length of the coating channel 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating apparatus for continuously forming a pattern on the surface of a substrate (work) such as a long thin metal plate or a plastic film. The present invention relates to a coating apparatus capable of performing stable multicolor coating while absorbing a width error generated at the time of material production or coating.

[0002]

2. Description of the Related Art Conventionally, a coating apparatus for continuously forming a pattern such as a band, a streak or a stripe using two kinds of coating materials on a long base material is described in Japanese Patent Publication No. 64-106. There is a device. In other words, this device completely seals the opening of the coating groove with the base material, supplies two kinds of paints of different colors to the coating groove, and stirs completely inside the coating groove. The base material is continuously moved in a state in which the base material is half mixed, thereby forming a stripe pattern on the surface of the base material.

[0003]

However, in the above apparatus, since the base material forms a closed motion wall which closes the opening of the coating groove, the width of the coating groove must be smaller than the width of the base material. An unpainted surface that is left unpainted is formed on both ends of the material, and there is a drawback that the entire surface of the base material cannot be painted. Therefore, rework such as slitting the uncoated surface is required in a later step, and disadvantages such as an increase in equipment and cost are caused.

[0004] Also, the base material made of various steel plates and films, etc., has a small error (about 0.2% of the base material width) in the base material width due to the manufacturing process (rolling, trim slitting, etc.).
~ 0.4%) is usually generated.
Due to differences in conditions during the painting stage (differences in equipment vibration and tension conditions), etc., the position of the fixed die coater on which both ends of the base material pass may change slightly with time. No measures have been taken to deal with
There was a problem that stable painting was not possible.

[0005]

According to the present invention, in order to solve such a problem, a variable bar for changing the length of the coating groove is provided at both ends of the coating groove, and the base material detected by the sensor is detected. By moving the variable bar corresponding to the position of both side edges, and while continuously changing the length of the coating groove so as to completely match the width of the base material, the coating is performed continuously. It is possible to paint over the entire surface of the base material at a time stably, responding to changes in the passing position of the base material side edge due to errors and differences in various conditions at the time of coating. The present invention proposes a coating apparatus capable of performing continuous coating without the need for processing, reducing costs and equipment.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a coating apparatus according to the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view schematically showing a coating apparatus α according to the present invention, FIG. 2A is a sectional view thereof, and FIG. 2B is an enlarged view thereof.
It is composed of paint A, paint B, backup roll C, die coater D, sensor E, control device F, and drive device G.

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

As shown in FIG. 2, the backup roll C is rotated in the direction of the arrow, adheres to the back surface of the substrate β, and moves the substrate β to the next step (drying, baking, cutting, etc.). The tension is applied to the material β, and the substrate β is stably moved so as not to meander or bend during the conveyance.

As shown in FIGS. 1 and 2, the die coater D is fixedly installed at an arbitrary position on the outer circumference of a circle where the substrate β and the backup roll C are in contact with each other. A pattern is painted on the entire surface.

As shown in FIG. 4, a die 1 having a substantially quadrangular prism shape, a head 2 in which one side of the die 1 is cut out with a diameter substantially equal to the diameter of the backup roll C,
A thin coating groove 3 having an arbitrary cross-sectional shape (semicircular cross-section in the figure) is formed at a substantially central portion of the drawing. Further, a first pipe 4 is connected to the back of the central portion of the painting groove 3,
The second pipe 5 is connected in the middle of the pipe 4.

Further, the coating groove 3 is provided at both ends of the coating groove 3.
A variable bar 6 having the same cross-section as that of FIG. 1 is inserted and arranged. The variable bar 6 can be moved left and right independently in the direction of the arrow, and the length of the coating groove 3 and the positions of both ends of the coating groove 3 are determined. It can be changed.

Further, as a mechanism for forming a pattern,
As shown in FIGS. 1, 2 and 3, when the paint A is supplied from the first pipe 4 and the paint B of a different color is supplied from the second pipe 5, the paints A and B are filled in the paint groove 3. And then begin to rotate, forming a semi-kneaded state (a state where they are not completely mixed but half-mixed), and the base material β moves there, whereby continuous bands, streaks, and stripes are formed on the surface of the base material β. A pattern in the shape of a letter is formed. Paints A and B to be supplied
Is composed of one or more optional components, for example, acrylic, urethane, epoxy, polyester, fluororesin, etc., and at least each color is different. Good. Further, one of the paints A and B may be supplied as only various pigments such as ink.

The width of the band, streak and stripe pattern is determined by the first pipe 4 depending on the stage at which the paints A and B gradually mix.
Are the widest and become narrower toward the end of the coating groove 3. The width, spacing, etc. of the bands, streaks, and stripes change depending on the amount ratio of the paints A and B to be supplied, and the amount ratio can be arbitrarily selected. Further, as shown in FIG. 2B, the head 2 of the die coater D is installed with a distance (clearance) of Δt from the base material β, and this Δt becomes the layer thickness of the pattern. is there.

In FIG. 2A, reference numeral 7 indicated by a dotted line denotes a valve, which is provided as necessary to adjust the filling amount when filling the coatings A and B into the coating groove 3.
Specifically, it comprises a rotary air valve or the like. Further, a third pipe or more (not shown, a plurality of pipes) may be connected to the first pipe 4 to perform coating in which three or more kinds of different paints are mixed.

The sensor E is installed in front of or behind the die coater D (in the forward direction in the figure). The sensor E independently detects the positions on the left and right sides of the base material β, and sends the information to a control device F described later. Is output. As examples of the sensor E, for example, an infrared sensor, a CCD line sensor, a pressure receiving sensor using jet air, a contact displacement sensor, an image reading sensor, and the like are arbitrarily used.

The control device F analyzes the positional information of the left and right ends of the base material β output from the sensor E and controls the activation of the driving device G described later. For example, a sequencer, a computer, a dedicated EPC control It consists of devices and the like.

The drive unit F moves the left and right variable bars 6 independently in the direction of the arrow based on a command from the control unit F, and changes the length of the coating groove 3 and the position of the left and right ends over time. Is changed. The driving device F includes, for example, an actuator, a servo driving device, and the like, and moves the variable bar by hydraulic pressure, pneumatic pressure, an electromagnet, or the like.

As described above, the width of the base material β and the passing position of the both ends of the die coater 2 are completely matched with the width of the coating groove 3 and the positions of the left and right ends (base material β width = width of the coating groove 3). It is capable of responding with time to changes in the width of the base material due to manufacturing errors and changes in the passing position of the base material side due to differences in various conditions at the time of painting, and stabilizing the entire surface of the base material at one time. It can be painted and does not require post-processing such as slitting.
It can reduce costs and equipment, and enables continuous coating.

The sensor E and the control device F, and the control device F and the drive device G are connected by any communication means 8 (radio waves, lead wires, cables of various specifications, etc.).

FIG. 5 is an explanatory view showing an arrangement of a series of apparatuses when the coating apparatus α is incorporated in a continuous line. The uncoiler H, the tension roll group I, the coating apparatus α, the baking furnace J, the cooling apparatus K, Tension roll group L, recoiler M
It is composed of In the drawing, arrows indicate the moving direction of the substrate β and the rotating direction of each device.

The uncoiler H is for storing the base material β in a coil shape, and for transporting the base material β to the next process together with the pinch roller 9.

Next, the tension roll groups I and L are formed so as to sandwich a coating apparatus α, a baking furnace J and a cooling apparatus K, which will be described later, and apply a tensile force (tension) to the base material β. It is. The configuration is such that a plurality of drive rollers 10 are arranged in a crank shape, and it is more effective if the rotation phase of the tension roll group I is slightly delayed from the rotation of the tension roll group L.

The coating apparatus α is installed by using the drive roller 10 of the tension roll group I as a backup roll C as it is.

Next, the baking furnace J is for baking and drying the ink and the paint, and the inside thereof is in a heated atmosphere using the heat of combustion of gas in the closed space. It is divided into three parts, a printing part 12 and a slow cooling part 13, and shows a mountain-like temperature distribution. That is, the drying unit 11 is at room temperature to about 100 degrees Celsius, and the baking unit 12 is at about 1 degree Celsius.
00 degrees to 300 degrees, the slow cooling unit 13 is about 300 degrees to 20 degrees Celsius.
It shows a temperature distribution of about 0 degrees.

Further, there are no free rollers or conveyors for supporting the base material β between the baking furnace J and a cooling device K, which will be described later. , Efficiently and stably. For this reason, since the base material β bends to some extent downward due to its own weight, the sensor 14 is disposed on the ground directly below a portion that becomes the top of this deflection, and the distance Δl between the ground and the top of the base material β is monitored. , So that the base material β is not placed on the ground.

The cooling device K includes a substrate β coming out of the baking furnace J.
Is cooled to room temperature, and comprises a closed space. Inside the water injector 15 and the blower device 16
Are installed in order on the front surface and the back surface of the base material β, and the base material β
In addition, water is sprayed from a water injector 15 to cool to room temperature, and compressed air is blown from a blower device 16 to remove water droplets attached to the base material β. A pallet for collecting water is installed on the ground of the cooling device K. This pallet is connected to a water tank / chiller device via a pipe, and has a circulation structure in which the pallet is guided again to the water injector 15. is there. The blower device 16 is connected to a compression device such as a compressor.

The recoiler M is for storing the coated base material β guided by the pinch roller 17 again in a coil shape. In the drawing, reference numeral 18 denotes a free roller.
As a support device for the base material β, a plurality of devices are arbitrarily installed at respective locations other than the baking furnace J and the cooling device K.

[0028]

Other Embodiments The above is an embodiment of the coating apparatus α according to the present invention. The coating apparatus α shown in FIGS. 6 to 14 may be used.

That is, FIGS. 6A and 6B show an example in which the sensor E is installed after the die coater D (post-process). The sensor E is installed at the die coater D.
The closer the distance is, the easier it is to match the width of the base material β with the width of the coating groove 3.

FIGS. 7A and 7B show an example in which the shape of the variable bar 6 is modified. The stopper portion 19 and the stopper portion 19 in which the variable bar 6 is formed to have the same cross-sectional shape as the coating groove 3 are shown. It is formed from the connected bar members 20.

FIG. 8A shows an example of a die coater D in which a plurality of first pipes 4 and second pipes 5 are connected to a coating groove 3 at an arbitrary pitch, and is particularly effective when the base material β is wide. is there.

FIG. 8B shows an example in which the tip portions of the die coater D and the variable bar 6 are formed from a rubber material or a synthetic resin material, which is effective for preventing the base material β from being damaged.

FIG. 9A shows an example of a coating apparatus α in which a die coater D is installed above a backup roll C. FIG.
(B) is an example of a die coater D in which the end of the base material β of the head 2 in the entrance direction is cut out and opened, and another kind of paint is supplied by a separate paint supply device 21 before the die coater D. It is useful for forming a painted surface having a more complicated and improved design.

FIGS. 10 (a) and 10 (b) show the case where the spreading roll 22 is installed behind the die coater D, and the coating film formed on the surface of the base material β is used to adjust the film thickness. It is effective when making it. Note that FIG.
In FIG. 10A, the extension roll 22 rotates in the same direction as the traveling direction of the base material β, but in FIG. 10B, it rotates in the opposite direction, which is effective for forming a complicated pattern and improving the design. Things.

FIG. 11 (a) is effective when the extension bar 23 is installed above the die coater D, and the coating film on the painted surface formed on the surface of the base material β is adjusted to make the film thickness constant. is there.

FIG. 11 (b) shows an example of a coating apparatus α in which a cleaning device N is installed on a backup roll C.
That is, the cleaning device N includes the backup roll C and the base material β.
Is to be installed at any place where it does not touch,
If the paint runs out and adheres to the backup roll C when the setup of the base material β is changed or the rod is replaced, the surplus paint is washed.

Specifically, the cleaning roll 24 and the pallet 2
5, the doctor 26. The surface of the cleaning roll 24 is, for example, a fibrous material, a synthetic resin body,
Surplus paint that is made of a material having excellent permeability such as rubber, is in contact with the backup roll C, rotates corresponding to the backup roll C, infiltrates the solvent 27 filled in the pallet 25, and adheres to the backup roll C. Is to wash.

The doctor 26 scrapes off the surplus paint and the solvent 27 that have finally adhered to the backup roll C, and removes any deposits on the surface of the backup roll C. Further, the solvent 27 depends on the properties of the paints A and B, for example,
Water, thinner, etc. are arbitrarily selected.

FIG. 12 shows an example in which the tension roll group I is not used as the backup roll C but is separately installed.

FIGS. 13 (a) and 13 (b) show that the transfer roll 28 is interposed between the base material β and the die coater D, and the transfer roll 28 is temporarily coated. This shows an example of a coating device α for transferring a pattern.

FIG. 14 shows an example of a coating apparatus α that processes and analyzes information from two sensors E on the left and right by one control device F and controls two driving devices G. Of course, these configurations can be arbitrarily selected to provide the coating apparatus α combined with each other.

[0042]

As described above, according to the coating apparatus of the present invention, a variable bar for changing the length of the coating groove is provided at both ends of the coating groove, and both ends of the base material detected by the sensor are detected. Move the variable bar in accordance with the position of the coating, and while continuously changing the length of the coating groove so as to completely match the width of the base material, the coating is performed continuously. In response to changes in the passing position of the side edge of the base material due to differences in various conditions at the time of coating, it is possible to paint over the entire surface of the base material at a time stably, and post-processing such as slitting No need, cost and equipment savings, continuous coating. There are features and effects such as.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a typical example of a coating apparatus according to the present invention.

FIG. 2 is an explanatory view showing a typical example of a coating apparatus according to the present invention.

FIG. 3 is an explanatory view showing a typical example of a coating apparatus according to the present invention.

FIG. 4 is an explanatory view showing an example of a die coater constituting the coating apparatus.

FIG. 5 is an explanatory view showing an arrangement when a coating apparatus is incorporated in a line.

FIG. 6 is an explanatory view showing another example of the coating apparatus according to the present invention.

FIG. 7 is an explanatory view showing another example of the coating apparatus according to the present invention.

FIG. 8 is an explanatory view showing another example of the coating apparatus according to the present invention.

FIG. 9 is an explanatory view showing another example of the coating apparatus according to the present invention.

FIG. 10 is an explanatory view showing another example of the coating apparatus according to the present invention.

FIG. 11 is an explanatory view showing another example of the coating apparatus according to the present invention.

FIG. 12 is an explanatory view showing another example of the coating apparatus according to the present invention.

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

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

[Explanation of symbols]

 α Coating device β Substrate A Paint B Paint C Backup roll D Die coater E Sensor F Control device G Drive device H Uncoiler I Tension roll group J Baking furnace K Cooling device L Tension roll group M Recoiler N Cleaning device 1 Die 2 Head 3 Coating Groove 4 first pipe 5 second pipe 6 variable bar 7 valve 8 communication means 9 pinch roller 10 drive roller 11 drying unit 12 printing unit 13 slow cooling unit 14 sensor 15 water injector 16 blower device 17 pinch roller 18 free roller 19 stopper Part 20 Bar material 21 Paint supply device 22 Extension roll 23 Extension bar 24 Cleaning roll 25 Palette 26 Doctor 27 Solvent 28 Transfer roll

Claims (1)

[Claims] 1. A coating apparatus for forming a pattern on the surface of a continuous long thin plate-like base material, wherein the coating groove has an arbitrary cross section installed at least across the surface of the base material and is connected to the coating groove. Equipped with a plurality of pipes, a die coater equipped with a variable bar that changes the length of the coating groove at both ends of the coating groove, and a sensor that is arranged before or after the die coater and detects the position of both sides of the base material , While supplying different types of paint continuously from the pipe into the coating groove, moving the base material in the longitudinal direction, and moving the variable bar in accordance with the position of both ends of the base material detected by the sensor Let
A coating apparatus for continuously performing coating according to the width of a base material while varying the length of a coating groove.