JP2002210399A - Coating liquid stirring method and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coating method and device capable of preventing a generation of sedimentation of a solid content in a coating liquid or a generation of skinning and bubbles on a skin surface of the coating liquid by stirring a whole of the coating liquid well even in the case where an aqueous coating liquid is used in the coating liquid stirring method and the device therefore. SOLUTION: In the coating liquid stirring device 15, a water-feed panel in which a bent blade material 12 bent to a V-shaped cross section and having a short lateral width and a bent blade material 14 bent to a reverse V-shaped cross section and having a short lateral width are alternately adjacent to each other and are arranged to a multi-step is inserted into the coating liquid filled in a stirring tank 2. The water-feed panel can be horizontally reciprocally moved in the stirring tank 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention stirs the entire coating liquid in a stirring tank or stirs to remove skinned film, dust, air bubbles, etc. floating on the surface of the coating liquid (hereinafter referred to as stirring). The present invention relates to a coating liquid stirring method and a device therefor, which is simply referred to as stirring. The present invention relates to a method and an apparatus for stirring a coating liquid.

[0002]

2. Description of the Related Art Heretofore, a large number of methods and apparatuses have been developed and put into practical use as immersion coating methods or stirring methods and apparatuses for performing the methods. A typical method and apparatus among a number of conventional dip coating methods or stirring methods and apparatuses for performing the methods will be specifically described as follows.

[0003] That is, as a conventional representative dip coating method or stirring method and an apparatus for performing these methods, for example, FIG.
Pump dip coating apparatus shown in FIG. 1, liquid level swing type dip coating apparatus shown in FIG. 12, blade stirring type dip coating apparatus shown in FIG. 13, liquid level overflow shown in JP-A-3-94858 or FIG. Type dip coating system, or JP 2000
2. Description of the Related Art A defoaming type dip coating apparatus shown in JP-A-218220 or FIG. 15 is known.

[0004] Pump circulation type dip coating apparatus 5 shown in FIG.
0, the coating liquid 52 filled in the immersion tank 51 is circulated in the immersion tank 51 using the liquid circulation pump 53, so that the solid content of the coating liquid 52 is settled or the surface of the coating liquid 52 This is a dip coating device that prevents the formation of a skinned film. In the figure, 54 is a temperature control heat exchanger, 55 is a chiller, and 56 is a heater.

[0005] A liquid level swing type dip coating apparatus 57 shown in FIG.
Are provided with rocking plates 58 on both inner side surfaces of the immersion tank 51, respectively, and configured such that these rocking plates 58 can be rocked by a plurality of air cylinders 58a arranged outside the immersion tank 51, By swinging the swing plate 58, the coating liquid 52
This is a dip coating apparatus which prevents the solid content from settling or forming a skin coating on the surface.

A blade stirring type dip coating apparatus 59 shown in FIG.
Is constituted by attaching a plurality of blade stirring members 60 to the side surface of the immersion tank 51, and operating the blade stirring members 60 to form the coating liquid 52.
This is a dip coating apparatus that prevents the solid content of the coating liquid 52 from settling or forming a skinning film on the surface of the coating liquid 52 by rotating the blades 60a inserted therein. .

A liquid surface overflow type dip coating apparatus 61 shown in FIG. 14 or the above-mentioned JP-A-3-94858 is
A liquid circulation pump 53 and a temperature control heat exchanger 5 are provided beside the immersion tank 51.
4. The cooling water device 55 and the heater 56 are installed, and the coating liquid 52 in the immersion tank 51 is caused to flow in the immersion tank 51, and at the same time, the new coating liquid 52 is gradually added and filled. The coating liquid 52 is caused to flow down from the coating liquid 52a, thereby preventing the solid content of the coating liquid 52 from settling or forming a skinning film on the surface of the coating liquid 52, and further floating on the surface of the coating liquid 52. This is a dip coating device designed to remove the upholstery film, dust and air bubbles.

A defoaming type dip coating apparatus 62 described in FIG. 15 or JP-A No.
1, the paint liquid 52 filled in the paint supply pipe 63,
This is an apparatus that circulates through a paint return pipe 64 and a liquid circulation pump (not shown) to reduce bubbles 65 generated on the surface of the paint liquid 52.

This device comprises a shaft 67 of an umbrella-shaped linear body 66.
Is rotated by a motor 69 mounted on a base 68 to agitate the surface layer of the coating liquid 52 with the linear body 66 to eliminate bubbles 65.

[0010]

However, FIG.
To the coating devices 50, 57, 59, 61, 6 shown in FIG.
When dip coating is carried out using No. 2, many problems specific to dip coating and described in detail in the following sections have occurred.

That is, when the dip coating method or the stirring method is carried out, sedimentation of solids such as pigments proceeds, a skin coating film is formed on the surface layer of the coating solution, and the surface layer of the coating solution is further formed. This causes problems such as the difficulty in using the above-mentioned conventional immersion coating method or stirring method and the apparatus for carrying out them.

The present invention is a completely new invention which has been developed in view of the many problems of the above-mentioned conventional immersion type coating method or stirring method and an apparatus for performing the same, and is an immersion tank filled with a coating liquid. By inserting the liquid-passing panel into the inside, and reciprocating the liquid-passing panel horizontally in the immersion tank, solids in the coating liquid settle out or a skinning film is formed on the surface of the coating liquid. It is intended to provide a new technology capable of preventing the generation of air bubbles or bubbles.

[0013]

The coating liquid stirring method according to the present invention is an invention which fundamentally improves the above-mentioned conventional problems, and the gist of the first invention of the coating liquid stirring method is as follows. In the method of stirring the entire coating liquid in the tank, a liquid passing panel capable of substantially stirring and passing the entire cross section of the coating liquid is rotated or reciprocated horizontally in the stirring tank. This is a coating liquid stirring method characterized by moving.

In the above-described method for stirring a coating liquid according to the first aspect of the invention, a liquid-passing panel capable of substantially stirring and passing the entire cross section of the coating liquid is inserted into a stirring tank, and the liquid-passing panel is inserted into the stirring tank. To reciprocate or rotate horizontally in
When the liquid-passing panel moves, the coating liquid is forced to pass through the gap between the liquid-passing panels, which generates a vortex in the coating liquid, and the vortex causes the entire coating liquid to be thoroughly stirred and stirred. Can be done.

As described above, a vortex is generated in the coating liquid by the movement of the liquid-passing panel, and by stirring the entire coating liquid, a skinning film or a bubble is generated on the surface of the coating liquid. Can be prevented. Further, the solid content in the coating liquid can be prevented from settling by substantially agitating and stirring the entire coating liquid by the movement of the liquid panel. When the present invention is carried out, a vortex is generated in the coating liquid, so that the side and the lower part of the moving liquid passing panel can be stirred well as well as the center of the coating liquid. Therefore, the solid content settled at the bottom of the stirring tank can be scraped up and dispersed in the whole coating liquid.

The gist of the second invention of the coating liquid stirring method according to the present invention is the coating liquid stirring method of the first invention, wherein the liquid passing panel is intermittently moved.

In the second invention of the above-mentioned coating liquid stirring method, the liquid passing panel is moved intermittently in the stirring tank, so that the liquid passing panel comes to a predetermined position in the stirring tank. The coating can be applied to the material to be coated by stopping it at that time and immersing the material to be coated in the stirring tank when the liquid passing panel is at rest.

The gist of the third invention of the coating liquid stirring method according to the present invention is that the liquid passing panel is moved to the surface of the coating liquid filled in the stirring tank so that the coating liquid floats on the surface of the coating liquid. The coating liquid stirring method according to the first or second aspect of the present invention, which removes a skinned film, dust, air bubbles, and the like.

In the coating liquid stirring method according to the third aspect of the present invention, the liquid-passing panel inserted into the stirring tank is moved along the surface of the coating liquid, so that it floats on the surface of the coating liquid. The coming skinning film, dust and air bubbles can be easily removed.

Further, the dip coating method according to the present invention is an invention which fundamentally solves the above-mentioned conventional problems, and the gist of the first invention of the coating liquid stirring method is that the coating liquid is coated in the stirring tank. In a coating method in which a coating material is immersed and a coating process is performed, a liquid-passing panel capable of stirring and passing a coating liquid is reciprocated or rotated horizontally in the stirring tank. This is an immersion type coating method characterized in that a coating liquid is applied to the surface of a material to be coated to perform coating.

In the immersion coating method according to the first aspect of the present invention, a liquid-passing panel through which a coating liquid can pass is inserted into a stirring tank, and the liquid-passing panel is rotated or horizontally moved in the stirring tank. Because it moves back and forth, when the liquid passing panel moves,
The coating liquid is forcibly passed through the gap between the liquid-passing panels, whereby a vortex is generated in the coating liquid, and the vortex allows the entire coating liquid to be well stirred.

As described above, a vortex is generated in the coating liquid by the movement of the liquid-passing panel, and by stirring the entire coating liquid, a skinning film or a bubble is generated on the surface of the coating liquid. Can be prevented. Furthermore, by stirring the entire coating liquid by moving the liquid panel,
It is also possible to prevent the solid content in the coating liquid from settling. When the present invention is implemented, since a vortex is generated in the coating liquid,
The sides and the lower part of the moving liquid passing panel can be stirred well as well as the center part of the coating liquid. Therefore, the solid content settled at the bottom of the stirring tank can be scraped up and dispersed in the whole coating liquid.

The gist of the second invention of the immersion type coating method according to the present invention is that the liquid-passing panel is intermittently moved and the material to be coated is immersed in the stirring tank when the liquid-passing panel is stationary. A dip coating method according to the first invention, characterized by performing a treatment.

In the second invention of the immersion type coating method described above, the liquid passing panel is intermittently moved in the stirring tank, so that the liquid passing panel is at the rear end or the front end of the stirring tank. Alternatively, the material to be coated can be coated by stopping it when it reaches a predetermined place such as an intermediate position, and immersing the material in the stirring tank when the liquid-passing panel is stationary.

The gist of the third invention of the immersion type coating method according to the present invention is that the liquid passing panel is moved to only the surface layer of the coating liquid filled in the stirring tank or to both the surface layer of the coating liquid. And removing the skin film, dust, air bubbles and the like floating on the surface layer of the coating liquid.

In the immersion coating method according to the third aspect of the present invention, the liquid-passing panel inserted into the stirring tank is moved only along the surface of the coating liquid or along both the coating liquid and the surface. Therefore, the skinning film, dust, air bubbles, and the like floating on the surface of the coating liquid can be easily removed.

The coating liquid stirring apparatus according to the present invention is also a technique which fundamentally improves the above-mentioned problems of the conventional apparatus. The gist of the coating liquid stirring apparatus of the first invention is to store the coating liquid. A coating liquid stirring apparatus characterized in that a liquid passing panel capable of substantially stirring and passing the entire cross section of the coating liquid is installed so as to be capable of rotating or reciprocating in a horizontal direction in the obtained stirring structure. It is.

The above-mentioned coating liquid stirring device of the first invention rotates or horizontally moves a liquid passing panel capable of substantially stirring and passing the entire cross section of the coating liquid in a stirring tank capable of storing the coating liquid. The liquid-passing panel can be moved in the circumferential direction or the horizontal direction in the stirring tank because the liquid-passing panel is installed and configured to be reciprocally movable in the direction. In addition, when the liquid-passing panel is moved, the coating liquid is forcibly passed through the gap between the liquid-panels, and a vortex is generated in the coating liquid, whereby the liquid can be stirred and well stirred.

The gist of the second invention of the coating liquid stirring apparatus of the present invention is that the liquid-passing panel is formed by forming a cutout or a hole in a flat plate. It is a stirring device.

In the second aspect of the above-mentioned coating liquid stirring device, a cut-out groove or a hole is formed in the flat plate to form the liquid-passing panel. When the coating liquid is moved in the horizontal direction, the coating liquid passes through the relatively narrow kerf or hole of the flat plate, so that a vortex is generated in the coating liquid, and the vortex can stir the coating liquid and stir it well. .

The gist of the third invention of the coating liquid stirring device of the present invention is that the liquid passing panel is composed of a plurality of inclined blades, a bent blade having a cross section bent into a predetermined shape such as a V shape, a polygonal bar-shaped blade, and the like. The coating liquid stirring device according to the first invention, wherein the blade members are arranged in parallel in a multistage manner.

In the third invention of the above-mentioned coating liquid stirring apparatus, a plurality of inclined blades, bent blades having a V-shaped cross section, polygonal bar-shaped blades, etc. are passed in parallel in a multistage manner. Since the panel is configured, when the liquid passing panel is moved in the stirring tank, the coating liquid passes through the gap between these blades,
In addition, when passing through, the coating liquid flows in a direction corresponding to the shape of each blade member, and generates a vortex, whereby the coating liquid can be stirred.

Therefore, by selecting the blade material of the liquid-passing panel to have a desired shape, adjusting the gap between these blade members, and changing the moving speed of the liquid-passing panel, it is possible to obtain various shapes. A vortex having a shape and a size can be generated in the coating liquid in the stirring tank.

In constructing the above-mentioned liquid-passing panel, it is possible to use a combination of blades having various shapes having different shapes, whereby each location of the coating liquid in the stirring tank can be used. For example, the method of stirring the coating liquid in the lower layer, the middle layer, the upper layer, or the surface can be changed.

The gist of the fourth invention of the coating liquid stirring device of the present invention is that the liquid passing panel is constituted by arranging the blades having different directions alternately adjacent to each other. 3 is a coating liquid stirring device of the third invention.

In the above-described coating liquid stirring device of the fourth invention, the blades having different directions such as the inclination direction and the bending direction are arranged alternately adjacent to each other on the left and right sides, for example. With this configuration, by moving the liquid-passing panel in the stirring tank, swirls having different directions are alternately generated in the coating liquid, and the entire coating liquid can be well stirred and stirred more effectively.

The gist of the fifth invention of the coating liquid stirring device according to the present invention is that the plurality of liquid passing panels are arranged in parallel in the front-rear direction, and the coating liquid of the first invention to the fourth invention is characterized in that: It is a liquid stirring device.

In the fifth invention of the above-mentioned coating liquid agitating apparatus, a plurality of liquid passing panels are arranged in parallel in the front-rear direction. By moving these liquid passing panels in the stirring tank, The coating liquid can be stirred more complicatedly and effectively.

[0039]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing one embodiment of a dip coating method or a stirring method according to the present invention and an apparatus for performing the method. FIG. 1 shows a first embodiment according to the present invention. FIG. 2 is a simplified perspective view of a second embodiment of the stirring device according to the present invention, FIG. 3 is an enlarged cross-sectional view of a main part showing the configuration of the liquid passage panel of FIG. 2, and FIG. It is a sectional enlarged view of an important section showing the composition of the liquid passage panel of the 3rd example of a stirrer concerning the present invention.

FIG. 5 is a simplified perspective view of a fourth embodiment of the stirring apparatus according to the present invention, FIG. 6 is a perspective explanatory view showing the structure of the liquid-passing panel of FIG. 5, and FIG. 7 is AA or FIG. It is sectional drawing in BB.

FIG. 8 is a perspective explanatory view showing the structure of a liquid passage panel of a fifth embodiment of the stirring device according to the present invention, and FIG.
It is sectional drawing of -C or DD. FIG. 10 is an explanatory perspective view of a stirring device according to a sixth embodiment of the present invention.

In FIG. 1, reference numeral 1 designates a stirring device which can be used also as a dip coating device of the first embodiment, which can be used in a solvent type coating liquid generally used at present or in the future. A liquid which can move in the horizontal direction in the stirring tank 2 is disposed in the rectangular stirring tank 2 in which any of the water-soluble coating liquids or the liquid containing an adhesive can be stored. Panel 3 is inserted.

The liquid passing panel 3 is suspended by a frame 4, and the frame 4 is configured to be able to reciprocate along the upper edge of the stirring tank 2 via a motor 5 and a belt 6. ing.

The liquid-passing panel 3 is constituted by forming a plurality of cut grooves 8 and holes 9 in a metal flat plate 7. The cut groove 8 provided in the flat plate 7 may be a vertical groove as shown in the figure, or may be a horizontal groove or an inclined groove. However, in order to generate more swirl in the coating liquid, the inclined groove is preferable.
The holes 9 provided in the flat plate 7 may be circular holes as shown in the figure, or may be triangular holes or polygonal holes.

The diameters of the cut grooves 8 and the holes 9 and the numbers provided on the flat plate 7 are determined in advance in accordance with the viscosity of the coating liquid to be used, the speed at which the liquid passing panel 3 is moved, and the like. You can do it. In the above-described embodiment, the liquid passage panel 3 has the cut groove 8 and the hole 9 provided side by side. However, the liquid flow panel 3 may be formed by the cut groove 8 or the hole 9 alone.

The liquid passing panel 3 can be reciprocated intermittently in the stirring tank 2. Therefore, when the liquid passing panel 3 comes to the front end or the rear end of the stirring tank 2, it can be temporarily stopped. It can be inserted into the stirring tank 2 and immersed in the coating liquid, and the coating liquid can be applied to the surface of the material to be coated to perform the coating.

As described above, when the liquid passing panel 3 is moved in the stirring tank 2, the coating liquid flows into the cut grooves 8 of the liquid passing panel 3.
And through the hole 9, the coating liquid passing through the kerf 8 and the hole 9 flows into the entire coating liquid to form a vortex, and the entire coating liquid is stirred by the vortex. And can be stirred well. The kerf 8 and the hole 9
When the diameter of the liquid passage panel 3 is reduced, or when the moving speed of the liquid passing panel 3 is increased, a large vortex is generated, so that the coating liquid can be stirred better.

When the liquid-passing panel 3 is moved in the stirring tank 2 by using the coating apparatus 1 of the first embodiment, the whole coating liquid can be uniformly and well stirred. No solid content in the liquid settled to the lower part of the stirring tank 2, no skinning film was formed on the surface of the coating liquid, and no bubbles were generated.

In particular, even when stirring or dip coating is performed using a non-polluting aqueous coating liquid that can be used in the future, the above-described sedimentation of solids, skinning of the surface layer, and generation of bubbles There was almost no occurrence, and good stirring or dip coating could be performed.

In preparing the liquid-passing panel 3, the present inventors initially prepared a comb-shaped liquid-passing panel by arranging a plurality of wires in parallel on the left and right sides (see JP-A-2000-218220).
No. 2), the experiment was carried out using this liquid-passing panel. In this case, almost no vortex was generated in the coating liquid, and therefore the coating liquid was well stirred and stirred. It was difficult. In this case, sedimentation of the solid content of the coating solution, generation of a skinned film, and generation of air bubbles occurred.

From the experiments described above, it was found that relatively narrow gaps such as the kerf 8 and the hole 9 were formed in the liquid passing panel 3 and the coating liquid was forced to pass through these narrow gaps. And found that it was necessary to stir the entire coating liquid.

As a result of various experiments, as will be described in detail later, the liquid-passing panel 3 is formed by providing the flat plate 7 with the cut grooves 8 and the holes 9 and a plurality of blades having various shapes. It has been invented that it is also possible to configure materials in parallel in multiple stages.

Further, by changing the shape of the kerfs 8, the holes 9 and the blade material, the inner diameter or size of the kerfs 8, the holes 9, or the interval and arrangement of the blade materials arranged in parallel, the coating liquid in the coating liquid is changed. It has also been invented that the shape, direction, size, etc. of the vortex generated in the vortex can be freely changed.

In FIGS. 2 and 3, reference numeral 10 denotes a coating liquid stirring device of the second embodiment, which has the same basic structure as the coating liquid stirring device 1 of the first embodiment shown in FIG. In this stirrer 10, as shown in FIG. 3 in particular, the liquid passing panel 11 has a plurality of V-shaped bent blade members 1.
2 in parallel.
The gap between the folded blade members 12 is configured to be relatively narrow, so that the bent tops (valleys) of the folded blade members 12 are formed at the two leading edges of the bent blade members 12. It is configured to be disposed inside.

In the above-mentioned liquid-passing panel 11, a plurality of bent blade members 12 are arranged in a multi-stage so as to be V-shaped, respectively. In the case of moving in the direction, the coating liquid that has passed through the gap between the bent blade members 12 flows along each bent blade member 12,
The coating liquid discharged into the surrounding coating liquid becomes an upward flow and can generate a vortex in the coating liquid.

In FIG. 4, reference numeral 13 denotes a liquid passage panel used in the coating liquid stirring device (not shown) of the third embodiment. The liquid passage panel 13 is bent into a plurality of inverted V shapes. It is configured by arranging the folded blade members 14 in multiple stages. The bent blade material 14 is the bent blade material 12.
Are substantially the same as those described above, and are simply reversed when used.

Since the above-mentioned liquid-passing panel 13 is formed by folding the blade members 14 bent in an inverted V shape in a multi-step manner, the liquid-passing panel 13 is moved in the coating liquid. In the meantime, since the coating liquid that has passed through the gap between each of the folded blades 14 flows along each of the bent blades 14, when the coating liquid is released into the surrounding coating liquid, it flows downward and forms a downward flow. Vortices can be generated in

In FIGS. 5 to 7, reference numeral 15 denotes a coating liquid stirring device of the fourth embodiment, and a liquid flowing panel 16 is inserted into the stirring tank 2. The liquid passage panel 16 is formed by combining the above-mentioned folded blade members 12 and 14 having a small width in a predetermined manner.

That is, as is apparent from FIGS. 6 and 7, the liquid-passing panel 16 is composed of a multiplicity of folded blade members 12 and 14 having a small width and being alternately adjacent to each other. It is arranged in a shape.

When this is moved in the coating liquid using the liquid passing panel 16 as described above, as shown in FIGS. 6 and 7, the coating liquid passing through the gaps between the bent blade members 12 is moved. The liquid generates an upward vortex, and the coating liquid that has passed through the gap between the adjacent folded blade members 14 can generate a downward vortex.

Therefore, the rising vortex and the falling vortex are generated alternately after the liquid passing panel 16 passes, and these vortices collide with each other and intersect with each other, so that an extremely complicated vortex is generated as a whole. Thereby, the coating liquid in the stirring tank 2 can be well stirred.

In the above embodiment, the blade material used for the liquid passing panel is a bent blade material. However, the blade material used in the fifth embodiment shown in FIGS. And a liquid-passing panel 18 in which inclined blades 17 are arranged in parallel in multiple stages.
It is also possible to use

In the case of the fifth embodiment, a large number of inclined blades 17 can be configured to be inclined in an arbitrary direction and at an arbitrary angle in advance. The fifth example illustrated in FIGS. 8 and 9
In the case of the embodiment, a large number of short inclined blades 17 having a small width are used, and when these inclined blades 17 are adjacent to each other, they are arranged in a multi-stage by combining them so that the inclination directions are alternately opposite. It is configured.

When the liquid passing panel 18 having such a structure is used, the liquid passing panel 16 of the above-described fourth embodiment is used.
As in the case of using the coating liquid, a vortex is generated in the coating liquid and the coating liquid in the stirring tank 2 can be well stirred.

In the above-described embodiment, the liquid-passing panel is constructed by arranging the folded blades or the inclined blades in a multi-stage manner. In addition to these blades, a polygonal bar-shaped blade (not shown) is used. Can also be used as a blade material for liquid passing panels

When the above-mentioned blade material is used for the liquid-passing panel, it is necessary that a large number of blade materials arranged in a multi-stage can be wound up in a blind shape as required. Is also possible. In the case where the liquid-passing panel can be wound up to a certain height in this way, only the surface of the coating liquid stored in the stirring tank 2 can be scraped by the liquid-passing panel. Skin membranes, air bubbles, dust and the like floating on the surface can be easily removed.
Of course, the same effect can be obtained when the liquid-passing panel inserted into the coating liquid is slightly raised so that the upper part of the liquid-passing panel is exposed from the surface of the coating liquid.

[0067]

EXAMPLE A description will be given of a process of dip coating 60 light-weight cellular concrete reinforcing steel cages (not shown) using the coating liquid stirring device 15 of the fourth embodiment.

[0068] 1.6m wide x 7.6m long x 0.8m deep
The solid content, latex, water and the like are mixed in a predetermined ratio in the square stirring tank 2 of the above, and the set liquid specific gravity is about 1.30, the temperature is about 20 degrees, and the liquid viscosity is about 0.8 Pa · s. Was filled. Then, the liquid-passing panel 16 having the above-described configuration is inserted into the coating liquid filled in the stirring tank 2, and the frame 4 is operated via the motor 5 and the belt 6, so that the liquid-passing panel 16 is moved to 10 to 20 m / m. It was reciprocated at a speed of minutes.

As a result, a complicated vortex was generated in the coating liquid in the stirring tank 2 and the coating liquid was well stirred, and no skinning film and no bubbles were formed on the surface of the coating liquid. And, as a result of measuring the upper part and the lower part of the coating liquid in the stirring tank 2,
The vertical specific gravity difference was within 0.3% and the vertical temperature difference was within 0.9%, and the coating liquid could be made uniform throughout. As a result, sedimentation of the solid content in the coating liquid could be almost completely prevented.

As described above, while the coating liquid is being stirred by the liquid flowing panel 16, the liquid flowing panel 16 is temporarily stopped at the rear end or the front end of the stirring tank 2, and while the liquid flowing panel 16 is stopped. The rebar cage was immersed in the coating solution for about 2 to 20 seconds to paint the surface of the rebar cage. As a result, a beautiful coating having a uniform composition and a uniform thickness was obtained on the surface of the reinforcing cage without any adhesion of skinning film, bubbles or liquid surface dust.

In the first to fifth embodiments shown in FIGS. 1 to 9 described above, all the stirring tanks 2 are formed in a rectangular shape, and the liquid passing panels 3 inserted into the stirring tank 2 11, 1
3, 16, and 18 are configured to reciprocate in the horizontal direction, respectively. However, the stirring tank 2 is the sixth tank shown in FIG.
As shown in the embodiment, it is also possible to configure a cylindrical shape.

Referring to FIG. 10, the sixth embodiment will be described in detail. The stirring tank 2 comprises a cylindrical inner tank 2a and an outer tank 2b which are filled with a coating liquid. Between the inner tank 2a and the outer tank 2b, a gap 19 having a predetermined width capable of storing the overflowing coating liquid is formed. A small-diameter cylinder 2c stands upright in the center of the inner tank 2a.

In the drawing, reference numeral 20 denotes a liquid passage panel having a number of small holes 9 formed therein, which is rotatably inserted into the inner tank 2a. The upper part of the liquid passage panel 20 is attached to a rotating shaft 22 via a support arm 21.
Therefore, when the rotating shaft 22 is rotated by the motor 23,
The liquid passage panel 20 is configured to rotate along the outer peripheral surface of the inner tank 2a and the outer peripheral surface of the cylinder 2c so as to stir the coating liquid in the inner tank 2a.

[0074]

According to the method for stirring a coating liquid of the present invention, a liquid-passing panel capable of substantially stirring and passing the entire cross section of a coating liquid is inserted into a stirring tank, and the liquid-passing panel is inserted into the stirring tank. As the liquid-passing panel moves, the coating liquid is forcibly passed through the gap between the liquid-passing panels because the liquid-passing panel moves, so that a vortex is generated in the coating liquid. This has the effect that the entire coating liquid can be stirred well and stirred.

As described above, a vortex is generated in the coating liquid by the movement of the liquid-passing panel, and the entire coating liquid is stirred, so that a skinning film or a bubble is generated on the surface of the coating liquid. This has the effect that it can be prevented from being performed. Further, the solid content in the coating liquid can be prevented from settling by substantially agitating and stirring the entire coating liquid by the movement of the liquid panel. When the present invention is carried out, a vortex is generated in the coating liquid, so that the side and the lower part of the moving liquid passing panel can be stirred well as well as the center of the coating liquid. Therefore, it has a great effect that the solid content settled at the bottom of the stirring tank can be scraped up and dispersed in the whole coating liquid.

When the liquid-passing panel is intermittently moved in the stirring tank, the panel is stopped when the liquid-passing panel reaches a predetermined position in the stirring tank, and the liquid-passing panel is stopped. Sometimes by immersing the material to be coated in the stirring tank,
It has the effect that the material to be coated can be painted.
In addition, when the liquid passing panel inserted into the stirring tank is moved along the surface of the coating liquid, the skinned film, dust, bubbles, etc. floating on the surface of the coating liquid are easily removed. There is an effect that can be.

In the immersion coating method of the present invention, a liquid-passing panel through which a coating liquid can pass is inserted into a stirring tank, and the liquid-passing panel is rotated or horizontally reciprocated in the stirring tank. Therefore, when the liquid-passing panel moves, the coating liquid is forcibly passed through the gap between the liquid-passing panels, thereby generating a vortex in the coating liquid, and the vortex can thoroughly stir the entire coating liquid. Has the effect that can be.

As described above, a vortex is generated in the coating liquid by the movement of the liquid-passing panel, and by stirring the entire coating liquid, a skinning film or a bubble is generated on the surface of the coating liquid. Has the effect of being able to prevent Further, by stirring the entire coating liquid by moving the liquid panel, it is possible to prevent the solid content in the coating liquid from settling. When the present invention is carried out, a vortex is generated in the coating liquid, so that the side and the lower part of the moving liquid passing panel can be stirred well as well as the center of the coating liquid. Accordingly, there is an effect that the solid content settled at the bottom of the stirring tank can be scraped up and dispersed in the whole coating liquid.

When the liquid-passing panel is moved intermittently in the stirring tank, it stops when the liquid-passing panel comes to a predetermined position such as the rear end, the front end, or the middle of the stirring tank. At least, by immersing the material to be coated in the stirring tank when the liquid-passing panel is at rest, there is an effect that the material to be coated can be coated. When the liquid-passing panel inserted into the stirring tank is moved only along the surface of the coating liquid or along with both the coating liquid and the surface, the skin floating on the surface of the coating liquid is moved. It has the effect of easily removing a film, dust, bubbles and the like.

The coating liquid agitating apparatus of the present invention rotates or horizontally reciprocates a liquid passing panel capable of substantially stirring and passing the entire cross section of the coating liquid in a stirring tank capable of storing the coating liquid. Because it was installed and configured to be able to move,
The liquid passing panel can be moved in the circumferential direction or the horizontal direction in the stirring tank. In addition, when the liquid-passing panel is moved, the coating liquid is forcibly passed through the gap between the liquid-panels, and a vortex is generated in the coating liquid, whereby the liquid can be stirred and well stirred.

In the case where the liquid-passing panel is formed by piercing a cut groove or a hole in the flat plate, when the liquid-passing panel is moved in the circumferential direction or the horizontal direction in the stirring tank, the paint liquid is compared with the flat plate. Since the fluid passes through a narrow groove or hole, a vortex is generated in the coating liquid, and the vortex has the effect of agitating and stirring the coating liquid well. Further, when a plurality of inclined blades, bent blades having a V-shaped cross section, a blade member such as a polygonal bar-shaped blade is arranged in a multi-stage to form a liquid-passing panel, the liquid-passing panel is placed in a stirring tank. When moved, the coating liquid passes through the gap between the blades, and when passing, the coating liquid flows in a direction corresponding to the shape of each blade and generates a vortex, thereby stirring the coating liquid. Has the effect that can be.

In the case where a liquid-passing panel is formed by arranging, for example, blades having different directions such as a tilt direction and a bending direction alternately adjacently on the left and right sides, the liquid-passing panel is placed in a stirring tank. By moving the inside of the coating liquid, swirling currents having different directions are generated alternately in the coating liquid, and the whole of the coating liquid can be stirred well and stirred more effectively. Further, when a plurality of liquid-passing panels are configured in parallel in the front-rear direction, moving these liquid-passing panels in the stirring tank makes it possible to more effectively and effectively agitate the coating liquid. It has such effects as possible.

[Brief description of the drawings]

FIG. 1 is a simplified perspective view of a stirrer according to a first embodiment of the present invention.

FIG. 2 is a simplified perspective view of a second embodiment of the stirring device according to the present invention.

FIG. 3 is an enlarged cross-sectional view of a main part showing the configuration of the liquid passage panel of FIG. 2;

FIG. 4 is an enlarged cross-sectional view of a main part showing a configuration of a liquid passing panel of a third embodiment of the stirring device according to the present invention.

FIG. 5 is a simplified perspective view of a fourth embodiment of the stirring device according to the present invention.

FIG. 6 is an explanatory perspective view showing the configuration of the liquid passage panel of FIG. 5;

FIG. 7 is a sectional view taken along AA or BB in FIG. 6;

FIG. 8 is an explanatory perspective view showing a configuration of a liquid passage panel of a fifth embodiment of the stirring device according to the present invention.

9 is a sectional view taken along the line CC or DD in FIG.

FIG. 10 is a perspective explanatory view showing a sixth embodiment of the stirring device according to the present invention.

FIG. 11 is a perspective explanatory view of a conventional pump circulation type dip coating apparatus.

FIG. 12 is a perspective explanatory view of a conventional liquid level swing type dip coating apparatus.

FIG. 13 is a perspective explanatory view of a conventional blade stirring type dip coating apparatus.

FIG. 14 is a perspective explanatory view of a conventional liquid surface overflow type dip coating apparatus.

FIG. 15 is a perspective explanatory view of a conventional defoaming type dip coating apparatus.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 coating liquid stirring device of first embodiment 2 stirring tank 2 a inner tank 2 b outer tank 3 liquid-passing panel 4 frame 5 motor 6 belt 7 flat plate 8 kerf 9 hole 10 The coating liquid stirring device of the second embodiment 11 ... liquid passing panel 12 ... bent blade material 13 ... liquid passing panel 14 ... bent blade material 15 ... the coating liquid stirring device of the fourth embodiment 16 ... liquid flowing panel 17 ... inclined blade Reference Signs List 18 ... liquid passing panel 19 ... gap 20 ... liquid passing panel 21 ... support arm 22 ... rotating shaft 23 ... motor 50 ... pump circulation type dip coating apparatus 51 ... stirring tank 52 ... coating liquid 52a ... upper edge 53 ... liquid circulation pump 54 … Temperature control heat exchanger 55… Cooling water device 56… Heating heater 57… Liquid level swing type dip coating device 58… Swing plate 58a… Air cylinder 59… Blade stirring type dip coating device 60 Blade 61 ... liquid level overflow type dip coating apparatus 62 ... antifoaming type dip coating apparatus 63 ... paint supply pipe 64 ... paint return line 65 ... foam 66 ... linear body 67 ... shaft rod 68 ... seat 69 ... motor

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat ゛ (Reference) B05D 1/18 B05D 1/18 4G078 F term (Reference) 4D075 AB02 AB12 CA47 EA05 4F040 AA01 AB04 BA42 CC03 CC08 CC11 CC20 4F042 AA01 AB00 CA01 CA06 CA10 CB20 CB27 DH10 4G035 AB43 AE19 4G036 AB03 4G078 AA30 AB05 BA05 CA01 CA05 CA12 CA17 DA30 DC01 EA10

Claims (11)

[Claims] In a method of stirring the entire coating liquid in a stirring tank, a liquid-passing panel capable of stirring and passing substantially the entire cross section of the coating liquid is provided in a horizontal direction in the stirring tank. A paint liquid stirring method characterized by reciprocating or rotating in a direction. 2. The coating liquid stirring method according to claim 1, wherein the liquid passing panel is intermittently moved. 3. The liquid-passing panel is moved to a surface of the coating liquid filled in the stirring tank to remove a skinned film, dust, bubbles, and the like floating on the surface of the coating liquid. A coating liquid stirring method characterized by the following. 4. In a coating method in which a material to be coated is immersed in a stirring tank to perform a coating process, a liquid-passing panel capable of stirring and passing a coating liquid is horizontally disposed in the stirring tank. An immersion type coating method characterized in that a coating liquid is applied to the surface of the material to be coated while reciprocating or rotating in the direction to perform coating. 5. The immersion according to claim 4, wherein the liquid-passing panel is intermittently moved, and the material to be coated is immersed in the stirring tank when the liquid-passing panel is at rest, to perform the coating treatment. Formula painting method. 6. The skin floating on the surface of the coating liquid by moving the liquid-passing panel only to the surface of the coating liquid filled in the stirring tank or to both the surface and the surface of the coating liquid. 5. The method according to claim 4, wherein the film, dirt, bubbles and the like are removed.
6. A method of immersion coating according to claim 5. 7. A liquid-passing panel capable of substantially agitating and passing the entire cross section of the coating liquid so as to be rotatable or reciprocated in a horizontal direction in a stirring structure capable of storing the coating liquid. A coating liquid stirring device characterized by the following. 8. The coating liquid stirring device according to claim 7, wherein said liquid passing panel is formed by cutting a groove or a hole in a flat plate. 9. The liquid-passing panel includes a plurality of blades such as a plurality of inclined blades, bent blades having a cross section bent into a predetermined shape such as a V shape, and polygonal bar-shaped blades, which are arranged in a multistage manner. The coating liquid stirring device according to claim 7, wherein 10. The coating liquid stirring device according to claim 9, wherein the liquid passing panel is configured such that the blade members having different directions are arranged alternately adjacent to each other. 11. The coating liquid stirring device according to claim 7, wherein a plurality of the liquid passage panels are arranged in parallel in the front-rear direction.