JPH0560990B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is capable of applying a desired paint onto the surface of a base material such as a board or rod by dipping coating, and adjusting the thickness of the paint film. Regarding equipment.

<Prior art> Various conventional methods have been used to paint base materials such as board materials (e.g. decorative boards, shelf boards, etc.), rod materials (e.g. baseboards, surrounding edges, etc.), and processed materials (e.g. window frames, doors, etc.). Various methods and devices are used.

One such device is a so-called dipping coating device. This has the advantage that even if the surface of the base material is uneven, coating can be easily performed with a simple operation.

However, dip coating is mainly applied to sheet-like objects, and it has been impossible to continuously apply dip coating to the above-mentioned substrates. Furthermore, when using dipping coating, not only does the amount of coating generally tend to be excessive, but it is also difficult to adjust the amount of coating. This is because, although the amount of coating is highly correlated with the viscosity of the paint, it is extremely difficult to maintain the viscosity of the paint strictly constant. The viscosity of the paint also affects the penetration of the paint components into the base material, and in order to achieve a uniform coating, it is necessary to increase the viscosity of the paint to a certain extent and apply thickly, so adjusting the amount of application is difficult. It becomes even more difficult. Furthermore, it is necessary to support the substrate for a while after removing it from the paint tank in order to allow excess paint adhering to it to flow down, but this process takes extra time and also reduces the amount of paint. Uneven application occurs due to sharpness and sag.

Spray painting equipment is also known. However, there is a large loss of paint, and the nozzle is easily clogged due to dust and paint scum in the paint.
Therefore, it is necessary to frequently perform paint management and maintenance and inspection of the nozzle, resulting in poor work efficiency and high costs.

In order to solve the above-mentioned drawbacks of the conventional coating equipment, a coating box having a supply port for supplying the base material to be coated with the paint and a take-out port for taking out the coated product is provided with the above-mentioned supply port and take-out port. While supplying the paint into the paint box above the level, the paint is depressurized inside the paint box, and the reduced pressure suction force prevents the paint from overflowing from the supply port and the take-out port, and the paint is taken out from the supply port. Paint is applied to the entire surface or desired surface area of the substrate while the substrate is moving to the outlet, and excess paint adhering to the substrate is removed by a high-velocity air flow at the outlet created by suction. A coating device and a coating method have been proposed which have the following main characteristics:

This coating technique maintains the inside of the coating box in a reduced pressure state, and uses this reduced pressure suction force to prevent paint from overflowing from the supply and removal ports, and continuously applies dip coating to the substrate. At the same time, the high-speed air flow generated by this reduced pressure suction force as if flowing into the coating box from the outlet port wipes away excess paint applied to the substrate and achieves the desired thickness. It is capable of forming a coating film. An auxiliary opening adjustment plate member is attached to the openings of the supply port and the extraction port so that the size and shape of the substrate can be adjusted. By adjusting the gap formed, the flow rate of the air flowing from the outlet is adjusted, and the coating film thickness can be adjusted as desired.

Although this coating technique can exhibit the excellent effects described above, subsequent research has revealed that it sometimes presents some problems. That is, when the base material is passing through the openings of the supply port and the take-out port, the above-mentioned gap is adjusted appropriately, but when the base material is not present in the above-mentioned openings, the openings remain wide open. left in the condition. This opening area becomes particularly large when the cross-sectional area of the substrate to be coated is large or when the coating thickness is set large. In order to prevent paint from overflowing from the opening, it is necessary to increase the vacuum suction force in proportion to the opening area, but this is difficult because the capacity of the pressure reducing means is actually limited. It was hot.
In addition, if the vacuum suction force is too strong, the air flow flowing into the coating box from the outlet when the substrate passes through the outlet becomes too high-speed, and the paint removal action at the outlet becomes too strong, causing the paint to be coated. It becomes difficult to adjust the amount. This has been a serious problem, particularly when it is desired to form a relatively thick coating layer on a substrate.

Therefore, even though the vacuum suction force is relatively small, it prevents paint from spilling out from the supply and take-out ports of the paint box, and it also allows the paint to stay inside the paint box regardless of the presence or absence of base materials at the supply and take-out ports of the paint box. with the purpose of forming and maintaining a substantially constant negative pressure condition in the
It has been proposed to install a movable shielding plate on at least one side of the supply port and the take-out port of the coating box having the above-mentioned configuration, which can adjust the opening area of the supply port and/or the take-out port.

This movable shielding plate is installed at either or both of the supply port and the take-out port of the coating box. Even if it is installed in only one of the openings, the capacity of the pressure reducing means to provide the vacuum suction force necessary to prevent the paint from overflowing from these openings can be relatively small. In particular, by installing a movable shielding plate at the outlet, the flow rate of air flowing in from the outlet is always maintained substantially constant, and the amount of paint deposited on the substrate can be easily and accurately adjusted. Furthermore, by installing movable shielding plates at both the supply and outlet ports,
The area of these openings is always kept constant regardless of whether or not the substrate passes, allowing for even more excellent pressure reduction efficiency and more precise adjustment of the substrate coating film.

<Problems to be Solved by the Invention> However, as a result of repeated experiments by the present inventors on a coating device in which such a movable shielding plate is installed at the outlet of the coating box, when the tip of the base material approaches the outlet of the coating box, Immediately after the movable shielding plate is activated to open the outlet, the airflow flowing into the coating box from the outlet does not reach the predetermined flow velocity, and therefore the front end of the base material does not reach the desired flow rate. It has been found that a large amount of paint tends to adhere without adjusting the amount of paint applied.

It is an object of the present invention to solve these drawbacks and provide a coating means that can uniformly form a coating layer of a predetermined thickness on all parts of a substrate to be coated.

<Means for Solving the Problems> A coating apparatus according to the present invention devised to achieve the above object includes at least one pair of a supply port for supplying a substrate to be coated and an outlet for taking out a coated product. a paint box having a paint box, a paint supply means for supplying paint into the paint box beyond the level of the supply port and the take-out port, and preventing the paint from overflowing from the openings of the supply port and the take-out port. a decompression means for reducing the pressure inside the painting box; and a movable shielding plate installed on at least one side of the supply port and the take-out port of the paint box so as to adjust the opening area of the supply port and/or the take-out port. It is characterized by having the above-mentioned outlet extending outwardly.

〈Operation〉 The base material is coated from the supply port to the take-out port of the coating box.
While being transported through the paint packed in a paint box, the paint is immersed in the paint in the same way as in the dipping method, and even if the base material surface is uneven, the paint can be easily and efficiently applied or impregnated onto the base material. . A reduced pressure state is maintained inside the coating box, and air is suctioned at high speed from the outlet, so paint that adheres excessively to the surface of the substrate is removed by the high-speed airflow as it passes through the outlet. This high-speed airflow dries the product taken out from the outlet until it is dry to the touch.

Since an extended passage is formed by protruding outward from the outlet of the paint box, while the base material coated with paint passes through this extended passage, it is exposed to the air flow at a constant flow rate flowing in from the tip opening. As a result, the paint is scraped off, and a coating film with a uniform coating amount is formed on the surface of the substrate.

The amount of paint applied to the surface of the substrate depends on factors such as the viscosity of the paint, the reduced pressure inside the coating box (negative pressure), and the conveyance speed of the substrate, so one or more of these factors should be adjusted as appropriate. The amount of application can be adjusted by adjusting the combination. Furthermore, by attaching a secondary air outlet to the coating box separately from the pressure reduction means and configuring the system to adjust the amount of air taken in from this secondary air outlet, it is possible to finely adjust the negative pressure inside the coating box. possible, whereby a fine and exact adjustment of the application amount can be achieved.

Furthermore, the relationship between the dimensions and shape of the outlet and the cross-sectional dimensions of the base material, that is, the area of the gap formed when the base material passes through the outlet, is also determined by the relationship between the dimensions and shape of the outlet, that is, the area of the gap formed when the base material passes through the outlet. Since this is one factor that determines the flow rate of the high-speed air flow, the coating amount can be adjusted by adjusting the area of this gap. Furthermore,
By appropriately adjusting the positional relationship between the supply and outlet openings and the base material, coating films of different thicknesses can be formed on each side of the base material.

Since air is suctioned at high speed from the supply and outlet ports of the paint box by the decompression means, the paint is sufficiently agitated by the large number of air bubbles formed in the paint, preventing contact with the substrate. becomes good. Therefore, coating and impregnation of the paint onto the substrate is promoted, and at the same time, precipitation of solid content and separation of liquid components in the paint are prevented.

Since the base material tends to vibrate vertically and horizontally during transportation within the paint box due to agitation of the paint, it is desirable to prevent this by providing an appropriate guide and support means between the supply port and the discharge port. . Furthermore, if a coating surface is formed on this guide support means to cover a part of the surface of the substrate over the entire length in the substrate conveyance direction, paint adhesion to the portion covered by the coating surface is prevented, and the substrate The paint can be applied and impregnated only on a desired surface portion or a desired surface.

The movable shielding plate disposed at the supply port and/or the takeout port of the paint box is operated to open and close vertically or horizontally. When the openings are opened, the openings at the supply and outlet ports are kept wide open according to the cross-sectional dimensions and shapes of the substrate to be coated, and are closed when no substrate is present in these openings. To prevent paint from overflowing from these openings without requiring an excessive vacuum suction force in a paint box by narrowing the opening area. In addition, the movable shielding plate contributes to keeping the negative pressure inside the coating box constant regardless of the presence or absence of substrates in the supply and removal ports of the coating box, enabling more precise and efficient adjustment of the coating amount. Make it.

It is preferable that the movable shield plate is automatically operated to open the supply port and the take-out port before the substrate passes through the supply port and the take-out port, and to close them after passing therethrough. can be installed.

The tip of the extended passage formed at the outlet of the coating box can be formed to be inclined at an arbitrary angle with respect to the substrate conveyance direction. As a result, especially when painting a substrate with an uneven pattern on the surface,
Fluctuations in air flow velocity between the concave portions and convex portions can be suppressed, and in this case also, a coating film with a uniform coating amount can be obtained.

<Embodiment> FIGS. 1 and 2 schematically show an embodiment of a coating apparatus according to the present invention. The coating box 10 is formed with a pair of a supply port 11 for supplying the base material 1 to be coated (FIG. 2) and a pair of outlet ports 12 for taking out the coated base material. These supply ports 1
1 and the opening area of the outlet 12 are determined in advance so as to correspond to the maximum size and shape of the base material assumed in advance, so that the present apparatus can be applied to base materials having various cross-sectional dimensions and shapes.

An extension passage 27 is formed that extends further outward from the coating box 10 from the outlet 12. The inner diameter cross-sectional area of the extended passage 27 matches the opening area of the outlet 12, and extends for a required length along the substrate conveyance direction.

The base material is conveyed in the direction of the arrow by a conveyor such as a roller or a conveyor 19a, introduced into the coating box from the supply port 11, and passed through the coating box by the guide bar member 13.
The coating material is guided along the top, led out from the coating box through the outlet 12 and the extension passage 27, and further conveyed in the direction of the arrow by a conveyance means such as rollers or a conveyor 19b. As will be described later, a large number of bubbles are formed in the paint in the paint box 10 due to the vacuum suction force, and this may cause the base material passing through the paint to vibrate. , consisting of a shaft 13a horizontally suspended over the coating box 10 so as to support the lower surface of the base material, and a pair of disc-shaped protrusions 13b, 13b attached to the shaft so as to sandwich both sides of the base material. (Figure 2). Preferably, these disc-shaped protrusions 13b, 13b are slidably mounted along the axis 13a so that they can be shared for suppressing lateral vibrations for substrates of different widths. Furthermore, in order to prevent vibration of the base material in the vertical direction, similar guide bar members may be provided on the upper surface of the base material so as to sandwich the base material from the top, bottom, left and right sides.

A lid 14 is provided to close the open top surface of the coating box 10 for cleaning, maintenance, inspection, etc. inside the coating box 10. As will be described later, the interior of the coating box 10 is configured to be depressurized and maintained in a negative pressure state, and to achieve this purpose, the lid 14 is structured to hermetically seal the coating box.

Paint is supplied to the paint box 10 by a paint supply means 20, and is filled into the paint box beyond the level of the supply port 11 and the take-out port 12. In the illustrated embodiment, the paint supply means 20 is shown as consisting of a paint tank 21, piping 22 and a pump 23.

The pressure reducing means 30 includes a vacuum pump 31 and piping 32, and reduces the pressure in the upper air chamber 21' of the paint tank 21. This air chamber 21' is communicated with the upper head space 16 of the paint box 10 via a communication passage 25 formed so as to surround the side wall 15 of the paint box 10, so that the air chamber 21' of the paint tank 21 is in communication with the upper head space 16 of the paint tank 21. The reduced pressure simultaneously results in a reduced pressure within the head space 16 of the paint box 10. When the viscosity of the paint is relatively high, clogging is likely to occur and cleaning becomes inconvenient, so in order to prevent this from occurring, it is preferable to make the cross-sectional area of the communication passage 25 large. Furthermore, this communication passage 25 serves to collect the paint supplied to the paint box 10 into the paint tank 21 when it overflows from the upper end of the side wall 15, so that the paint inside the paint box 10 is The liquid level can be adjusted.

A plurality of baffle plates 24 are formed to project diagonally from the top surface of the paint tank 21 into the upper air chamber 21'.
As will be described later, the paint that is sucked by the vacuum pump 31 along with air bubbles formed in the paint in the paint box 10 due to reduced pressure is deposited here, and drips naturally as shown by the arrow in the figure. By collecting the air into the paint tank 21, a gas-liquid separation means is constructed which functions so that only air is sucked through the pipe 32. At that time, the baffle plate 24
In order to return the paint adhering to the paint tank 21 to the paint tank 21 without drying, it is desirable to coat the surface of the baffle plate 24 with a resin, or to pour or spray a solvent on the surface of the baffle plate 24.

The vacuum pump 31 is connected to the air chamber 2 of the paint tank 21.
1' and the communication passage 25, the upper head space 16 of the paint box 10 is depressurized to a predetermined level. With this pressure reduction, the supply port 11 and the outlet 12
Atmospheric air is sucked in at high speed through the opening of the paint box, and floats in the paint inside the paint box as air bubbles as shown in the figure (Figure 1). Due to the movement of the bubbles in the paint, the paint in the paint box 10 is vigorously agitated, thereby preventing the solid content in the paint from settling and the liquid components thereof from separating. If foam formation becomes excessive, an antifoaming agent is used as appropriate. Droplets of paint are generated in the head space 16 along with the bubbles, but as described above, the paint adheres to the baffle plate 24 during the suction process and is separated from the gas.

The base material introduced into the coating box 10 from the supply port 11 is immersed in the paint while moving toward the take-out port 12, similar to the dipping method, and the paint sufficiently penetrates into the irregularities on the surface of the base material. be painted. When the substrate approaches the outlet 12, it encounters an air flow drawn at high speed from the tip opening of the extension passage 27,
Excessive paint adhering to the surface of the base material is blown off to adjust the amount of paint applied, and the paint is dried to the point where it is dry to the touch.

For example, when the pressure reducing means 30 becomes inoperable due to a power outage or the like, there is a risk that the paint in the paint box 10 will overflow from the supply port 11 and the outlet 12 (or the opening at the end of the extension passage 27). In order to prevent this, it is preferable to provide means for removing the paint. In the illustrated embodiment, this paint removal means is normally closed, and the paint removal means is normally closed.
It is shown as a valve means 35 configured to automatically open when the internal pressure rises above a predetermined value.

Furthermore, a movable shielding plate capable of adjusting the opening areas of these openings is disposed at least one of the tip openings of the supply port 11 and the outlet extension passage 27 of the coating device 10. In the illustrated embodiment, a movable shielding plate 17 is provided at the supply port 11, and a movable shielding plate 18 is provided at the tip opening of the outlet extension passage 27, respectively. The movable shielding plates 17 and 18 may have the same structure and mechanism, and are composed of a single plate member or an assembly of a plurality of divided plate pieces, and are arranged vertically or horizontally with cylinders, gears, etc. The opening area of the supply port 11 and the outlet extension passage 27 can be adjusted arbitrarily by a known drive mechanism (not shown).

In the apparatus of this embodiment in which the movable shielding plates 17 and 18 are installed at the supply port 11 and the end opening of the extension passage 27 of the coating box 10, respectively, when there is no base material in the coating box 10, the movable shielding plates 17 and 18 and 18 are held in positions that narrow the opening area of the supply port 11 and the opening at the tip of the extension passage 27 (hereinafter referred to as the closed position), and when the base material passes through these openings, the cross-sectional dimensions and shape of the base material are The movable shielding plate is operated to a position (hereinafter referred to as the open position) that forms an opening area that is large in size, and is held in this open position while the substrate passes through. In this case, the supply port 1 when the movable shielding plate is in the closed position
1 and the narrowed opening area of the end opening of the extension passage 27 and the area of the gap formed between these openings and the cross section of the base material passing through when the movable shielding plate is in the open position are approximately the same. Consideration will be given to ensure that

In this way, move the movable shielding plates 17 and 18 to the supply port 11.
and the opening at the tip of the extraction port extension passage 27, and by operating in synchronization with the conveyance of the substrate, the actual opening area is always maintained whether or not the substrate passes through these openings. can be made almost constant, and therefore the flow rate of the air flow sucked from these openings by the pressure reducing means 30 is made constant,
The coating film on the base material is precisely adjusted. Furthermore, since the area of the openings narrowed in this way is maintained, it is possible to prevent paint from overflowing from these openings without increasing the vacuum suction force in the pressure reducing means 30 more than necessary.

It is preferable that the movable shielding plates 17 and 18 are configured to be automatically operated in synchronization with the conveyance of the substrate,
For this purpose, a detection device 26 that detects the presence or absence of the base material is installed behind the supply port 11 in the base material conveyance direction. Any type of detection device known in the art can be used, and includes a detection sensor such as a phototube, a limit switch, a proximity switch, a linear transformer, or the like. When the detection device 26 detects the arrival of the tip of the substrate directly under the movable shielding plates 17 and 18 in the closed position with no substrate present in the device, the detection device 26 and After a certain period of time automatically measured in consideration of the distance to the supply port 11 and the substrate conveyance speed (that is, immediately before the substrate reaches the supply port 11), the movable shielding plate 17 is automatically operated to open the opening. position, open the supply port 11, and open the supply port 1.
Enables base material insertion from 1. Furthermore, the movable shielding plate 18 is displayed after a certain period of time automatically measured in consideration of the distance between the detection device 26 and the outlet 12 and the substrate conveyance speed (that is, immediately before the substrate reaches the outlet 12). is automatically operated to move to the open position, open the tip of the extension passage 27, and open the extension passage 27.
Enables derivation of base materials from. Similarly, when the detection device 26 detects the rear end of the substrate, the movable shielding plates 17 and 18 are automatically activated after a certain period of time has elapsed to move them to the closed position, opening the supply port 11 and the tip of the extension passage 27. The area is reduced. In this way, these opening areas are always automatically adjusted to be substantially constant. In order to operate the movable shielding plates 17 and 18 after a certain period of time has elapsed after detection by the detection device 26, a known timer, pulse generator, etc. may be used as appropriate.

Although not shown, opening area adjusting means may be attached to the tip openings of the supply port 11 and the extension passage 27, respectively. Before using this device, these opening area adjusting means are operated as appropriate depending on the cross-sectional dimensions and shape of the base material to be coated, fixed at a position where the desired opening area is formed, and then the base material is coated. The position will be maintained as long as the
As a result, the gap between the opening area and the base material when the base material passes through the opening is adjusted to a predetermined area,
Enables coating of substrates with different cross-sectional areas. On the other hand, during operation of the apparatus, the movable shielding plates 17 and 18 are reciprocated between the open position and the closed position depending on the presence or absence of a base material at the opening, and when no base material is present at the opening, they are reciprocated. The opening is controlled to have an area approximately equal to the predetermined gap area.

In the present invention, as shown in the drawings, an extension passage 27 is formed extending forward in the substrate transport direction from the outlet 12, and this is a main feature of the coating apparatus of the present invention. When the tip of the base material conveyed in the arrow conveyance direction approaches the take-out port 12, it is detected by the detection device 26, and based on the detection signal, the movable shielding plate 18 provided at the tip of the extension passage 27 will be released. For a certain period of time from this point until the tip of the base material reaches the tip of the extension passage 27,
Since the predetermined gap area described above is maintained, the tip of the base material can also receive the desired paint scraping effect due to the air flow at the predetermined flow rate flowing through the gap. Therefore, a coating film with a uniform coating amount is formed over the entire length of the substrate.

The tip of the outlet extension passage 27 in the coating device shown in FIGS. 1 and 2 is opened by cutting it in a plane perpendicular to the substrate conveyance direction, but it can be opened at any angle as shown in FIG. 3. It may also be tilted at an angle. The coating device having this oblique tip opening surface 28 has the following features:
It is effectively used when coating a base material in which an uneven pattern is formed on the coated surface of the base material, particularly a groove 29 extending in the width direction of the base material perpendicular to the transport direction. That is, after applying dip coating in the paint box 10 to the surface of the base material on which such grooves 29 are carved, the paint is scraped off by a high-speed air flow flowing in from the opening at the end of the extension passage. If the tip of the extended path is opened perpendicularly to the substrate conveyance direction as shown by the dotted line in FIG. When there is an uncarved part), a predetermined air inflow speed is obtained, but as the base material advances further and the groove 29 reaches the cut end, the opening area increases, so the air flows slowly. It gets to the point where all you can get is a sink. Therefore, the predetermined paint scraping effect could not be obtained in the grooves 29, and the paint tended to stay in the grooves. Therefore, in this embodiment, by slanting the opening surface,
This suppresses fluctuations in the inflow velocity between the convex portions and the concave grooves on the surface of the base material. Further, by providing such an oblique opening surface, the effect of a so-called air knife can be enhanced, and the paint inside the groove 29 can be efficiently scraped off.

<Effects of the invention> Similar to the dipping method, the base material can be dipped in the paint for painting, so even if the surface has unevenness, efficient painting can be performed. The high-speed air flow from the base material outlet removes the paint excessively attached to the surface of the base material when it is taken out from the outlet, and this phenomenon can be used to reduce the coating film thickness. Adjustments can be made easily. Furthermore, it is possible to prevent paint from overflowing from the opening of the paint box even with a relatively small vacuum suction force. Furthermore, the area of the opening of the coating box can be maintained almost constant regardless of the presence or absence of the base material, and therefore the flow rate of the high-speed air flow from the opening can also be kept constant, making it possible to control the coating film thickness more precisely. This makes it possible to make adjustments.

In addition to these effects, in the present invention, since an extended passage communicating with the outlet is formed, the paint is scraped off by the air flow at a constant flow rate while passing through the extended passage, and the amount of paint applied is reduced. A uniform coating film can be obtained. In particular, the same effect as in other parts can be obtained even at the tip of the substrate, where the paint scraping effect has not been sufficiently achieved in the past, and it is possible to obtain a coating film with a uniform coating amount over the entire substrate. Furthermore, if the tip of the extension passage is inclined at an arbitrary angle with respect to the substrate conveyance direction, when painting a substrate with an uneven pattern on its surface, the concave and convex portions will be It is possible to reduce fluctuations in the air flow rate caused by changes in the air flow rate, and it is possible to obtain a coating film with a uniform coating amount even on such substrates.

[Brief explanation of the drawing]

FIG. 1 is a front view schematically showing an embodiment of the coating apparatus according to the present invention, FIG. 2 is a sectional view taken along the line shown in FIG. It is a perspective view showing this together with a base material. Explanation of symbols, 1... Base material, 10... Paint box, 1
1... Supply port, 12... Outlet port, 11', 12'...
...Aperture adjustment plate, 17, 18...Movable shielding plate, 20
...Paint supply means, 21...Paint tank, 25...
...Communication path, 26...Detection device, 27...Extension path, 28...Oblique opening surface, 29...Concave groove, 30...
...pressure reducing means, 31... vacuum pump.

Claims (1)

[Scope of Claims] 1. A coating box having at least one pair of a supply port for supplying a substrate to be coated and a discharge port for taking out a coated product, and a coating box that extends beyond the level of the supply port and the discharge port. a paint supply means for supplying the paint into the paint box; a depressurizing means for reducing the pressure inside the paint box to prevent the paint from overflowing from the openings of the supply port and the outlet; and the supply of the paint box. A movable shielding plate is provided on at least one side of the supply port and/or the outlet so as to adjust the opening area of the supply port and/or the outlet, and the outlet is extended outwardly. Painting equipment. 2. The coating apparatus according to claim 1, wherein the tip of the extended outlet is inclined at an arbitrary angle with respect to the conveyance direction of the base material. 3. The movable shielding plate is characterized in that it opens and closes in synchronization with the timing at which the base material is carried into the coating box from the supply port and/or carried out from the coating box from the outlet. Claim 1
Painting equipment described. 4. A detection means for detecting the presence or absence of the base material is installed behind the supply port in the conveyance direction, and an automatic opening/closing means is further provided for automatically opening and closing the movable shielding plate in response to a detection signal from the detection means. The coating device according to claim 1, characterized in that: 5. A paint filling means that is substantially filled with the desired paint to be dip coated on the surface of the base material and whose interior is maintained in a reduced pressure state, and a paint filling means formed below the paint filling level on one side of the paint filling means. a base material supply port, a base material outlet formed below the paint filling level opposite to the base material supply port on the other side of the paint filling means; An extension passage is formed to extend outward for a required length substantially along the substrate conveyance direction, and the opening at the tip of the extension passage is normally closed, and the base material is supplied from the paint filling means through the extension passage. 1. A coating device comprising: an opening/closing means operated to open the opening when the material is carried out.