JPH01151968A - Immersion coating applicator - Google Patents

Abstract

PURPOSE:To prevent a turbulent flow from being generated in the just upper part of a rectification member and also to allow coating to be overflowed from an application tank without being circulated in this tank and to subject a body to be applied with coating at uniform film thickness by providing the smoothing member having a plurality of flow path windows or flow path holes to the upper part of the feed port of the application tank. CONSTITUTION:Coating introduced into an application tank 1 through a coating feed port 2 provided to the lower part of the tank 1 is passed and raised between the circumference of a smoothing member 5 provided to the upper part of this feed port 2 and the inner circumference of the application tank 1 and through the flow path windows 9 provided to the rectification member 5. Then the raised paint is overflowed from the upper end 6 of a cylinder inserted with a body to be applied and thereafter recovered from a recovery port 4 and again fed through the feed port 2. Therefore turbulent flow is not generated to the just upper part of the rectification member 5 and the coating in the application tank 1 is not circulated in the tank. As a result, the concn. and flow velocity of paint in the tank 1 can be uniformized and the body to be applied which has been immersed in the cylinder can be applied with coating with uniform film thickness.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a dip coating device, and in particular, it supplies paint to a cylindrical or cylindrical object from the lower part of the coating tank, and prevents the paint from overflowing from the upper part of the coating tank. This relates to a dip coating device that applies paint by immersing the paint into a coating tank that collects and resupplies paint, and then pulling it up.

<Prior art> Dip coating is performed by dipping the object to be coated in the paint stored in a coating tank and then pulling it up, but it is possible to coat even objects with complex shapes. It is possible to mass produce, there is little loss of paint, the equipment is relatively simple, and it is advantageous in terms of cost.It is possible to apply film thicknesses ranging from 1 micron or less to several hundred microns, and the film thickness can be controlled with precision. Hg is widely used because it has the advantage of being able to be applied uniformly. It is particularly suitable for coating cylindrical or cylindrical non-coated objects.

In the case of dip coating, the paint is generally allowed to overflow from the coating tank in order to prevent uneven film thickness and drying of the paint surface due to uneven paint concentration. (USP2808344, U
SP 3046156, etc.], the overflowing paint is collected and re-supplied from the bottom of the coating tank for circulation and continuous use. However, the supplied paint does not necessarily create a constant flow, so the flow rate, stagnation, etc. in the coating tank may occur. This will cause the paint to become disordered, causing uneven thickness of the coating layer during coating. Particularly in electrophotographic photosensitive drums that require film thickness control of several microns or less, the above-mentioned film thickness unevenness has a great effect on electrophotographic characteristics and image quality.

In order to prevent such unevenness in film thickness, there is a method of installing a rectifying member such as a disc or conical plate over the paint supply port at the bottom of the coating tank to keep the flow of paint constant (Japanese Patent Application Laid-Open No.
9-139967). According to this method, the effect of weakening and equalizing the flow velocity of the paint flowing into the coating tank, and
The effect of preventing paint from being applied directly to the object to be coated can be seen.

FIG. 10 shows an example of a conventional example in which a conical plate-shaped flow regulating member is installed above the paint supply port at the bottom of the coating tank. A cylindrical coating tank 1 is installed with its axis facing vertically, and its lower part is constricted into a funnel shape, and a paint supply port 2 is provided at the bottom end of the funnel. This paint supply port 2
Paint is supplied from a paint tank 3 via a pump 11 to the paint tank 3.

The upper part of the coating 4W1 is provided with a collection part 12 for collecting paint overflowing from the upper end 6 of the cylinder into which the object to be coated is placed.
The paint is collected into the paint tank 3 through a paint recovery port 4 provided at the V paint. In the coating tank 1, a conical plate-shaped flow regulating member 13 (see FIGS. 5(a) and 5(c)) is installed above the paint supply port 2 with the conical portion facing upward. Therefore, the paint flowing from the paint supply port 2 passes between the rectifying member 50 and the coating tank 1 and moves upward.

However, as shown by the arrow, most of the paint that has become laminar in the coating tank overflows from the coating tank, but some of it circulates within the coating tank. Since these circulating paints are temporarily exposed to the outside air on the surface of the coating tank, the volatile solvent evaporates and the paint concentration increases, resulting in uneven concentration with the supplied paint.
In addition, in the above-mentioned circular plate, immediately above the conical plate, uneven flow velocity inevitably occurs due to turbulence, so strict uniformity of film thickness cannot be achieved.

This invention was made in view of these problems, and its purpose is to prevent the turbulent flow that occurs immediately above the flow straightening member, and to prevent the paint in the coating tank from circulating in the coating tank. By providing a rectifying member that allows the paint to flow out of the coating tank without causing any damage, it is possible to equalize the concentration, flow rate, etc. of the paint in the coating tank, thereby making it possible to precisely equalize the film thickness of the object to be coated. purpose.

<Means for Achieving the Object> Ninthly, the dip coating apparatus according to the present invention supplies a cylindrical or cylindrical object to be coated with paint from the lower part of the coating tank, and supplies the paint from the lower part of the coating tank to the upper part of the coating tank. In a dip coating device that applies paint, the paint is collected and re-supplied into the coating tank, which is then pulled up. A flow regulating member having a plurality of channel windows or channel holes was installed.

Effect> The paint that has flowed into the coating tank through the paint supply port moves upward through each of the plurality of flow path windows or flow path holes provided in the rectifying member.

<Embodiment> FIGS. 1 and 2 are explanatory diagrams showing a first embodiment of the present invention.

FIG. 1 is an explanatory diagram showing a state in which a flow regulating member having a plurality of channel windows or channel holes is installed in a coating tank. Application tank 1
The structure and the fact that the paint circulates through the paint tank 3 and the ponder 11 (however, the paint tank 3 and the ponder 11 are not shown in FIG. 1) are the same as the conventional example shown in FIG. 10, and will not be explained. omitted.

In this embodiment, a flow straightening member 5 (referred to as 1) having a plurality of flow passage windows or flow passage holes is attached to the base of a conventional flow straightening member at the same position as the conventional flow straightening member. . As shown in FIG. 2, the flow regulating member 5 has a shape in which a cone having the same diameter and a predetermined angle as the diameter of the cylinder abuts on one end surface of a cylinder having a predetermined diameter and length. The rectifying member 5 has three grooves penetrating its outer peripheral portion in the axial direction in a concentric circle from the axis. Each of the three grooves has a predetermined groove width, and the outermost groove among the three grooves has the widest groove width, and the groove width becomes narrower toward the inner groove. Moreover, all three grooves are inclined, as shown in FIG. 2(b), and have a shape that approaches the axial direction as they proceed from the cylindrical side to the conical side. These grooves also have 4 grooves in the radial direction.
The connecting members 14 are left symmetrically in this direction, and as a result, the flow path window 9 made of 3×4=12 arcuate grooves is provided in the rectifying member 5. Note that the rectifying member 5 includes:
A hole 8 of a predetermined diameter runs through the axis, and the hole 8 is used to attach the flow regulating member 5 to the coating tank l, and the hole 8 is not a paint flow path. It won't happen.

The flow regulating member 5 is attached to the upper part of the paint supply port with the conical part facing downward (the installation method is not shown).
, a certain distance exists between the circumference of the flow regulating member 50 and the inner circumference of the coating tank 1.

From the paint supply port 2, the paint is distributed between the periphery of the rectifying member 5 and the inner periphery of the coating tank 1, as shown by the arrow in FIG.
It is provided in the rectifying member 5 and rises through the Kukiji window.

The rising paint then overflows from the upper end 6 of the cylinder into which the object to be coated is placed. Therefore, there is no possibility of overselling immediately above the rectifying member, and the paint in the coating tank is not circulated within the coating tank.

FIG. 3 and FIG. 4 show other implementation rows, in which four types of rectifying members different from those used in the first embodiment (
By installing the respective flow regulating members in place of the flow regulating member 5 in the coating tank 1 shown in FIG. 1, the second embodiment, the third embodiment, This is a fourth embodiment and a fifth embodiment.

The second embodiment uses a rectifying member 5h (A2) shown in FIGS. 3(a) and 3(b), and the rectifying member 5a has a circular plate with a predetermined outer diameter and thickness, Three concentric grooves pass through the outer periphery in the axial direction. Each of the three grooves has a predetermined groove width, and the outermost groove among the three grooves has the widest groove width, and the groove width becomes narrower toward the inner groove. In addition, connection members 14 are left in these grooves symmetrically in four directions in the radial direction, and in the end, the flow regulating member 51 has 3
A channel window 9 made of a book arc-shaped groove is provided. A ninth hole 8 is provided in the center of the disk for attachment to a coating tank l of a predetermined diameter.

The third embodiment is a rectifying member 5b (43) shown in FIGS. This can be obtained by molding the flow regulating member 5a shown in the second embodiment into a funnel shape using a press or the like.

The fourth embodiment uses a rectifying member 5c (mu 4) shown in FIGS. 4(1) and 4(b), and the rectifying member 5c is
It has a shape in which a cone with the same diameter and a predetermined angle as the diameter of the cylinder is in contact with both end faces of a cylinder with a predetermined diameter and length, and is spaced at equal intervals around the axis in a plane perpendicular to the axis. Holes (a-way holes 10) of the same diameter penetrate parallel to the axis at the intersections of the book's rays and four equally spaced concentric circles. Further, between each radius line, a hole is bored on the same circumference as the outermost hole and has the same diameter as the hole on the radius line. Therefore, the rectifying member 5eK is provided with 8×4+8=40 flow passage holes 10. Incidentally, a hole 8 of a predetermined diameter is provided on the axis.

The fifth embodiment uses the rectifying member s a (A5) shown in Figs. A disk is used instead of the one with a good shape that abuts, and the other aspects are the same as the fourth embodiment.

Streaming member 5 = 5as5b-5cp5d (41 to 45), flow path windows and flow path holes in the flow regulating member, number 1 area, diameter in the direction perpendicular to the axis of the flow regulating member (circumference of the flow regulating member and inside of the coating tank) The distance between the gap and the surrounding area] is such that the paint can overflow from the coating tank without causing turbulence directly above the rectifying member, and without circulating the paint in the coating tank. The paint concentration, R speed, etc. are determined optimally so that the objects of the present invention can be achieved by completely equalizing them.

FIG. 5 shows three examples of conventional rectifying members, which were used in experiments of Examples described later.

Rectifying member 13aC&6 shown in Fig. 5(,),(b)
) consists of a circular plate with a predetermined diameter and thickness, and a hole 8 is provided in the center along the axis for attachment to the coating tank 1 of a predetermined diameter.

The rectifying member 13 (referred to as A7) shown in FIGS. 5(a) and 5(c) has a cone having the same diameter and a predetermined angle as the diameter of the cylinder abutting one end surface of a cylinder having a predetermined diameter and length. The mounting hole 8 has a predetermined diameter along the axis.

The rectifying member 13 b (
A 8) has a shape in which a cone is in contact with both end faces of a cylinder of a predetermined diameter, and a hole 8 of a predetermined diameter extends over the axis and passes through it.

FIGS. 6 and 7 are explanatory diagrams showing a sixth embodiment of the present invention.

In this embodiment, as shown in FIG. 6, a flow straightening member 13 according to the conventional example shown in FIG. t-installation and next thing. Therefore, the explanation other than the installation of the second flow regulating member 13 on the flow regulating member 13 is the same as that of the conventional example shown in FIG. 1O, so the explanation thereof will be omitted.

The second rectifying member 7 has a predetermined diameter as shown in FIG.

It has an outer shape in which the end of a cylinder with a certain thickness and length is covered with a funnel-shaped roof that is approximately concave and has a predetermined angle with the cylinder. And on the outer periphery of the funnel-shaped roof.

Three grooves penetrate in the axial direction in the form of concentric circles from the axis. Each of the three grooves has a predetermined width.
The outermost groove of the book has the widest groove, and the groove width becomes narrower toward the inner groove. Furthermore, as shown in FIG. 7(b), all three grooves have a shape that is inclined and approaches the axial direction as they proceed from the cylindrical side to the funnel-shaped roof side. These grooves also have 4 grooves in the radial direction.
The connecting members 14 are left symmetrically in the direction, and as a result, the fL adjusting member 5 is provided with a flow path window 9 consisting of 3×4=12 arcuate grooves. Note that a hole 8 of a predetermined diameter passes through the funnel-shaped roof of the flow regulating member 7 along the axis, and the hole 8 serves as a hole for attaching the flow regulating member 7 to the coating tank l. Therefore, the hole 8 does not serve as a flow path for the paint.

The rectifying member 7 is attached to the coating tank 1 with the cylindrical part facing downward, covering the conventional rectifying member 13 that is attached to the upper part of the paint supply port (installation is as follows). (Method not shown). The periphery of the lower end of the cylindrical portion is in close contact with the circumference of the coating tank l, and therefore the flow regulating member 13
All the paint that has risen through the gap between the circumference of the coating tank L and the inner circumference of the coating tank L enters the cylinder of the second flow regulating member 7, and passes through the flow path window 9 provided in the funnel-shaped roof part. and rise.

In this embodiment, since the rectifying members are provided in two stages as described above, the speed is weakened to some extent by passing between the conventional rectifying member 13 and the inner periphery of the coating tank l, and the speed is not uniform. All of the rising paint passes through the flow path window 9 provided in the second straightening member 7, so that the speed is further made uniform, and as shown by the arrow in FIG. The paint rises not only near the outer periphery but also near the center, and the rising paint overflows from the upper end 6 of the cylinder into which the object to be coated is placed. Therefore, by having two stages of rectifying members, it is possible to more effectively generate turbulent flow just above the rectifying member 13, and to prevent the paint in the paint tank from circulating in the paint tank.

As a seventh embodiment, a conventional flow regulating member xabC plate 8) is installed above the paint supply port 2 of the coating tank l, and a second flow regulating member 7 (A9) is installed above the flow regulating member 13b. The following may be considered (not shown).

As an eighth embodiment, a rectifying member 5b (43) according to the present invention is installed above the paint supply port 2 of the coating tank 1 instead of the rectifying member according to the conventional example, The one in which the second rectifying member 7 (A9) according to the present invention is installed (
That is, we considered a structure in which the rectifying members according to the present invention were installed in two stages, upper and lower (not shown).

In this example, since both of the upper and lower flow rectifying members have a plurality of flow path windows or flow path holes, the concentration of the paint is made uniform through the lower flow path windows or flow path holes. By passing the paint, which is designed to equalize the velocity and prevent the occurrence of turbulence, through the upper channel window or channel hole, it further equalizes the concentration, equalizes the velocity, and prevents the occurrence of turbulence. Moreover, the paint overflows from the upper end 6 of the cylinder without circulating through the coating tank.

8 and 9 show the second rectifying member 7 used in the sixth embodiment in order to consider the ninth to twelfth embodiments to be described later.
Two types (410, Al and I) of the second rectifying member different from the above are shown.

The second rectifying member 7a shown in FIGS. 8(a) and 8(b)
(410) is the flow regulating member 7 (49) with all the funnel-shaped roof parts inside the innermost groove removed (therefore, that part is a large nameplate (flow passage hole)).
), and the rest is the same as the rectifying member 7.

The second rectifying member 7b shown in FIGS. 9(a) and 9(b)
(All) is a circular plate having a predetermined diameter and a predetermined angle around the end of a cylinder having a predetermined diameter, thickness, and length, and having approximately the same thickness as the cylinder. It has an external shape covered with a roof. In the conical surface of this roof, there are three holes on the circumference that draw concentric circles around the axis.
It penetrates in the axial direction. All holes on the same circumference have the same diameter, and they are all equally spaced.
There are 16 holes lined up on the outermost circumference, 12 holes lined up on the middle circumference, and 16 holes lined up on the innermost circumference. In the end, the second rectifying member 7bK is provided with 16+12+16=44 holes (channel holes) 10. Note that the diameter of the hole at the outermost circumference is the largest, and the hole diameter becomes smaller toward the inner circumference. In addition, a hole 8 of a predetermined diameter for attaching to the coating tank 1 along the axis is penetrated through the disk portion of the roof of the rectifying member 7b.

As a ninth embodiment, a conventional flow regulating member 13b (48) is installed above the paint supply port 2 of the coating tank 1, and a second flow regulating member 7a (mu 10) is installed on the flow regulating member 13b. I considered what was installed (not shown).

As the first embodiment, a rectifying member 5b (7fL3) according to the present invention is installed above the paint supply port 2 of the coating tank 1 instead of the light regulating member according to the conventional example, and a rectifying member 5b (7fL3) is installed above the rectifying member 5b. A case in which a second rectifying member 7 & (mu 10) was installed was considered (not shown).

As an eleventh embodiment, 1. A rectifying member x3b (48) according to the conventional example is installed above the paint supply port 2 of the coating tank 1, and a second rectifying member 7b (All) is installed on the rectifying member 13b. (not shown).

As the twelfth implementation row, a rectifying member 5b (mu 3) according to the present invention is installed above the paint supply port 2 of the coating tank 1 instead of the rectifying member according to the conventional example, and further above the rectifying member 5b. A configuration in which a second rectifying member 7b (411) is installed is considered (not shown).

Second rectifying member 7, 7m, 7b (49-A
11) The placement position of the flow path window and the tIt path hole in the rectifying member.

The area of the number 1, the axial length of the second flow regulating member, the distance between the flow regulating member above the paint supply port and the second flow regulating member, etc.
It is possible to overflow from the paint tank without causing overflow immediately above the rectifying member, and without the paint circulating in the paint tank, which equalizes the paint concentration, flow rate, etc. Optimally determined so that the purpose of the invention can be achieved.

Next, an experiment was actually conducted using the above example.

The inner diameter of the coating tank 1 was 110 mm and the height was 420 mm.

The object to be coated is an aluminum cylinder with an outer diameter of 80 cm and a length of 360 cm, and a 0.7μ polyamide undercoat layer (product name,
Amiran AN-8000 (manufactured by Teikoku Kagaku) was prepared.

Next, paints using an azo pigment and a hydrazone compound were prepared.

A paint using an azo pigment is prepared by adding 2,190 parts by weight of cyclohexanone to 100 parts by weight of an azo pigment having the following structure and 40 parts by weight of butyl resin (trade name, S-LEC BM-2, manufactured by Sekisui Chemical Co., Ltd.). Dispersion was carried out for 8 hours at 2000 revolutions/minute using a sand mill using large diameter beads. After separating the pieces, 2,300 parts by weight of methyl ethyl ketone was added and filtered under pressure using a 10 micron membrane filter to form a paint.

A paint using a hydrazone compound consists of 10 parts by weight of a hydrazone compound with the following structure, polycarbanate resin (trade name,
Kneepilon N3. (Mitsubishi Gas Chemical Exhibition) 10 parts by weight and 35 parts by weight of monochlorobenzene.

A mixture containing 10 parts by weight of zochloromethane was prepared.

In the experiment, a paint containing an azo pigment was first stored in a coating tank 1 and circulated through a glass pong 11 at a speed of 0.61/min.

The prepared aluminum cylinder was immersed in this, and 260μ/
Coating was carried out while pulling up at a speed of 1 minute, and after drying at 90° C. for 10 minutes, an azo pigment layer of 0.2 μm was obtained.

In addition, in order to measure the film thickness unevenness of the azo pigment layer, the outer diameter is 80cm,
A 50μ mylar sheet is wrapped around a 360μ long aluminum cylinder and a 0.7μ polyamide undercoat layer (product name,
Amiran EN-8000' (manufactured by Kokugaku Kagaku) was prepared and coated in the same manner as above to obtain an azo pigment layer.

Next, the paint using the hydrazone compound was stored in the coating tank 1 and circulated in the same manner as the paint using the azo pigment.

The above aluminum cylinder on which the azo pigment layer was formed was immersed in this, and the coating was carried out while being pulled up at a speed of 155 m/min. After drying at 120° C. for 60 minutes, a photoreceptor having a hydrazone layer of 21 μm was obtained.

The experiment was conducted for all of Examples 1 to 12.

The method for measuring film thickness unevenness after coating is described below.

Regarding the azo pigment layer, the above-mentioned azo pigment-coated 50
Peel the μ Mylar sheet from the aluminum cylinder and use a transmission type Macbeth densitometer (trade name: a TD-904° manufactured by Macbeth) to determine the concentration. Measurement is on the top of the sheet, bottom edge 5
Measurements were taken every 26 cm k 1 cm inside cW1.

For the hydrazone layer, use the Kerato film thickness meter (product name).

The film thickness was measured at 36 points in the local direction at positions 5.10, 15, 20.25, and 30α from the upper end of the photoreceptor using a HEL-MUT (manufactured by FISCHER).

Furthermore, the resulting photoreceptor was subjected to image evaluation using a copying machine, with particular attention paid to image density unevenness in halftones.

As a result of the above measurements, in all of Examples 1 to 12, the photoreceptors obtained had uniform film thicknesses in both the azo pigment layer and the hydrazone layer, and good images with little unevenness in image density were obtained.

For comparison, a conventional rectifying member with a diameter of 6°7. &
An experiment was conducted using only 8, under the same conditions as above (referred to as comparative column 1, comparative example 2, and comparative example 3, respectively), but there was a difference in film thickness for both the azo pigment layer and the hydrazone layer. was large, and uneven tone appeared on the image.

The above experimental results are summarized in Table-1.

<Effects of the Invention> In the present invention, since a flow rectifying member having a plurality of flow path windows or flow path holes is installed above the paint supply port, the paint rises from that part using the flow path windows or flow path holes as passages. In order to
In addition to preventing turbulence that occurs just above the rectifying member,
This allows the paint to overflow from the paint tank without being circulated in the paint tank, making it possible to equalize the paint concentration, flow rate, etc. in the paint tank, thereby making it possible to precisely uniformize the film thickness of the object to be coated.

Table-1

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing a first embodiment of the present invention, and FIG. 2 shows a rectifying member C&1 according to the present invention. same as below〕
It is an explanatory diagram showing the same figure (凰) is a plan view, the same figure (b)
is a ■-■ cross-sectional view, and FIG.
and 3), the figure (b) is a plan view common to A2 and A3, the figure (b) is a sectional view taken along the line ■-■ concerning the rectifying member A2, and the figure (,) is a rectifier. ■-■ Regarding member A3
The cross-sectional view and FIG.
), and the same figure (,) is a plan view common to the modules 4 and 45. The figure (b) is a sectional view taken along IV-IV of the rectifying member A4, the figure (c) is a cross-sectional view taken along IV-F of the rectifying member flat 5, and FIG. M7.A8)
This is an explanatory diagram showing 46. Mu7 and Mu8
The same plan view (b) is a common plan view of the rectifying member A6.
(c) is a V--■ cross-sectional view of the rectifying member A7, (d) is a v--■ cross-sectional view of the rectifying member 48, and FIG. 6 is a sixth embodiment of the present invention. It is an explanatory diagram showing the seventh
The figure is an explanatory view showing the second rectifying member (referred to as grave 9) according to the present invention, the figure (,) is a plan view, and the figure (b) is -
■Cross-sectional view, Figure 8 shows the second rectifying member (mu1
0), and the figure (,) is a plan view,
FIG. 9(b) is a cross-sectional view taken along ■-■, and FIG.
It is an explanatory view showing a rectification member (all), and the same figure (,) is a top view. FIG. 10(b) is a sectional view taken along the line IX, and FIG. 10 is an explanatory diagram showing the conventional row. l... Application tank, 2... Paint supply port, 4... Paint collection port, 5, 5 m, 5 b, 5 e, 5
d "" rectifying member according to the present invention, 6... paint liquid level,
? t7a*7b...Second rectifying member according to the present invention, 9
... Channel window, 10... Channel hole, 13.13 m, 13
b... Conventional rectifying member. Agent Patent Attorney Seki Taira Yamashita Figure 1 Figure 5

Claims (4)

[Claims] (1) By immersing a cylindrical or cylindrical object to be coated into a coating tank in which paint is supplied from the bottom of the coating tank, the paint overflowing from the top of the tank is collected and re-supplied, and then lifted up. A dip coating device for applying a paint, characterized in that a flow regulating member having a plurality of channel windows or channel holes is installed above a supply port arranged at the bottom of the coating tank. (2) A patent claim characterized in that the flow rectifying member provided with the plurality of flow path windows or flow path holes is a disk, a cylinder, a cone, a double cone, a truncated cone, a double truncated cone, or a combination thereof. The dip coating device according to item 1. (3) The above-mentioned flow rectifying member provided with a plurality of flow path windows or flow path holes is installed above the paint supply port, and is connected from the side wall of the coating tank to the top of the flow path window or flow rectifying member without flow path holes. Claim 1 or 2, characterized in that the flow channel window or flow channel hole protrudes in a manner that covers the flow rectifying member that does not have a flow channel hole.
Dip coating equipment as described in section. (4) The flow regulating member provided with the plurality of flow path windows or flow channel holes is composed of two stages, upper and lower, and the upper flow regulating member is placed above the lower flow regulating member from the side wall of the coating tank to the lower flow regulating member. 3. The dip coating device according to claim 1 or 2, wherein the dip coating device protrudes in a manner that covers.