JP2012016640A - Dip coating apparatus, compound dip coating apparatus, and dip coating method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dip coating apparatus for efficiently dip-coating many treating objects such as bolts and nuts, efficiently removing excessive coating liquid, and stably forming a uniform coating layer on each treating object, and to provide a compound dip coating apparatus having it and a dip coating method.SOLUTION: This dip coating apparatus or the like includes a dipping tank for storing the coating liquid, a storing means for dipping the treating object in the coating liquid while the treating object is stored, and a rotating means for rotating the storing means about the vertical rotary axis. The center section on the bottom surface of the storing means has a projecting section that uses the rotary axis as the center axis and extends toward the inside of the storing means. The peripheral surface and projecting section of the storing means have a plurality of openings.

Description

The present invention relates to a dip coating apparatus, a composite dip coating apparatus, and a dip coating method.
In particular, a dip coating apparatus capable of efficiently removing excess coating solution even when a large amount of objects to be processed is processed at once by utilizing centrifugal force and airflow, such dip It is possible to efficiently remove excess coating processing liquid by using a composite dip coating apparatus that further includes a workpiece input mechanism and a recovery mechanism, and centrifugal force and airflow. The present invention relates to a dip coating method.

Conventionally, as a method of forming a coating film on the surface of an object to be processed, the object to be processed is immersed in a coating treatment liquid, then lifted, and then applied to the object to be processed while removing the excess coating treatment liquid. A dip coating method (dip coating method) in which the coating solution is dried and cured is widely implemented. And, for the purpose of applying a prescribed amount of paint, a dip coating apparatus having a predetermined structure is provided. It is disclosed (for example, see Patent Document 1).
More specifically, as shown in FIG. 13, the substrate A to be coated is connected between the origin limit switch 207 and the lower limit overrun limit switch 208 along the pole screw 202 via a pole screw nut 203. A dip provided with a coated substrate support unit 204 that supports the substrate to be moved up and down, a drive unit 201 that drives the coated substrate support unit 204 to move up and down, and a coating tank 212 that dip the coating material onto the coated substrate A In the coating apparatus 200, a non-contact type displacement sensor 209 that detects the distance to the liquid level of the paint tank 212 is provided in the coated base material support unit 204, and based on the detection signal from the non-contact type displacement sensor 209, the driving unit 201. A non-contact displacement sensor amplifier 210 and a shim as a driving unit control means for controlling the driving of the motor. Kensa 211 is a dip coating device 200 provided with.

Further, for the purpose of shortening the liquid draining time in the dip coating method, there has been proposed a dip coating apparatus provided with an airflow generating means for generating an airflow below the elevating member (see, for example, Patent Document 2). .
More specifically, as shown in FIG. 14, the tank 301 is filled with a coating liquid containing a volatile solvent component, and the coating object 302 such as a circuit board is immersed in the coating liquid in the tank 301. This is a dip coating apparatus 300 that pulls up from the liquid surface by a suspending means 305 connected to the elevating member 303 and forms a coating film on the surface of the coating object 302 in a stable liquid.
Then, when the application target 302 is completely pulled up by the elevating member 3 connected to the support rod 304, an air current is generated that generates an air current in a lower portion of the elevating member 303 including the blower 311, the filter 312, and the telescopic tube 313. Since the means 309 is provided, the dip coating apparatus 300 is configured such that an air flow indicated by an arrow is generated toward the air discharge port 306 and the solvent component is volatilized by the air flow.

On the other hand, as a device that can solve the problem of liquid drainage in small metal products such as bolts and nuts in the dip coating method, a step of curing the coating treatment liquid immediately after spraying the coating treatment liquid on the workpiece to be stirred. A tumbler coating apparatus that forms a coating film by repeating the process has been proposed (for example, Patent Document 3).
More specifically, the tumbler coating apparatus 400 shown in FIG. 15 includes a chamber 405 for agitating and processing the small metal product 403, and the bottom thereof is centered on a recessed portion 406 that is recessed in the inner direction. The fixed spray nozzle 408 for spraying the coating treatment liquid 402 at a predetermined time and its circulation path 410 are provided so as to have a central axis 407 for continuous rotational movement and to be located inside the chamber 405. ing.
The coating liquid 402 is sprayed from the fixed spray nozzle 408 while the chamber 405 is slowly rotated at about 30 to 60 rpm by the central shaft 407 and cured immediately thereafter, and the spray process and the curing process are performed several times. It is a tumbler coating apparatus 400 that repeatedly forms a coating film having a predetermined thickness over a period of time.

JP-A-9-248507 (Claims) JP 2007-38210 A (Claims) Japanese translation of PCT publication No. 2003-516841 (Claims)

However, since the dip coating apparatus disclosed in Patent Document 1 (see FIG. 13) uses natural fall to remove excess coating processing liquid from the workpiece, so-called liquid draining time becomes very long. The problem was seen.
In addition, since the excess coating solution moves downward due to gravity on the surface of the object to be processed until the liquid is drained, the coating thickness at the upper and lower parts of the object to be processed is not uniform. There was also a problem that it was easy to become.

  Moreover, since the dip coating apparatus of patent document 2 (refer FIG. 14) does not utilize centrifugal force, when trying to dip-coat a lot of processed objects, such as a volt | bolt and a nut, to-be-processed object However, there is a problem in that the airflow does not reach the workpiece to be processed inside, making it difficult to efficiently drain the liquid, and the coating thickness becomes uneven. It was.

  On the other hand, the tumbler apparatus of Patent Document 3 (see FIG. 15) needs to spray a small amount of coating treatment liquid over a long period of time and perform a curing treatment each time, and collectively using the tumbler apparatus. There was a problem that the amount of workpieces that could be processed was very small.

Therefore, as a result of intensive studies, the inventor of the present invention can efficiently use centrifugal force and airflow by providing a predetermined immersion tank, a storage unit, and a rotation unit in a dip coating apparatus or the like. As a result, even when a large amount of objects to be processed is processed at once, it is found that an excessive coating treatment liquid can be efficiently removed and a coating layer having a uniform thickness can be stably formed. The present invention has been completed.
Further, in the composite dip coating apparatus, it is found that production efficiency is remarkably improved by providing not only a predetermined dip coating apparatus but also a predetermined workpiece input device, a predetermined processed material recovery device, etc. The present invention has been completed.
That is, the object of the present invention is to enable a dip coating process to be performed on a large amount of objects to be processed at a time, and to efficiently remove excess coating processing liquid, and to obtain a uniform thickness for each object to be processed. Another object of the present invention is to provide a dip coating apparatus and a dip coating method capable of stably forming a coating layer of the above, and a composite dip coating apparatus including such a dip coating apparatus.

  According to the present invention, a dip coating apparatus for immersing a predetermined amount of an object to be processed in a storage means in a coating processing liquid stored in a dipping tank to provide a processing object having a coating layer. In this case, the drive means for immersing the storage means in the state where the object to be processed is immersed in the coating treatment liquid and the storage means are rotated or reciprocated around the vertical axis of rotation (positive in one direction). A rotating means for removing excess coating treatment liquid, and a rotating means for removing the excess coating treatment liquid. In addition to providing a convex portion having a predetermined space inside, a plurality of openings for communicating the coating treatment liquid is provided on the peripheral surface and the convex portion of the storage means, and by rotating or reciprocating rotation of the storage means, Centrifugal force and damn The by generating excess coating treatment solution dip coating apparatus characterized by removing there is provided, it is possible to solve the problems described above.

In other words, since such a dip coating apparatus is provided with an accommodating means having a predetermined opening and a convex portion, even when a dip coating process is performed collectively on a large amount of objects to be processed. By immersing the storage means in the coating treatment liquid in the immersion tank, the coating treatment liquid can be efficiently applied to the object to be treated.
In addition, after the container means is pulled up from the coating treatment liquid, it is rotated or reciprocally rotated by a predetermined rotating means, thereby efficiently removing excess coating treatment liquid adhering to the object to be treated using centrifugal force. be able to.
In addition, by rotating or reciprocating the accommodating means, an airflow that moves in the accommodating means from the convex portion toward the outside in the accommodating means without providing a special airflow generator. Therefore, excess coating treatment liquid adhering to the object to be treated can be efficiently removed using such an air flow.
Therefore, with the dip coating apparatus of the present invention, even when a large amount of objects to be processed are processed at once, a coating layer having a uniform thickness can be stably formed on each object to be processed. it can.

In configuring the dip coating apparatus of the present invention, it is preferable that the shape of the convex portion is a cylindrical shape having a pointed portion or a conical shape.
By comprising in this way, while becoming easy to generate an air current toward the exterior direction of a storage means from a convex part in a storage means, when storing a processed material with respect to a storage means, The mechanical damage in the convex part due to the collision with the convex part can be reduced.

Moreover, when comprising the dip coating apparatus of this invention, it is preferable that the bottom face of an accommodating means has an inclination part which inclines below toward a center part from a peripheral part.
By configuring in this way, the impact on the object to be processed can be improved, and a coating layer having a more uniform thickness can be stably applied to a small object to be processed having an opening like a nut. Can be formed.

Moreover, when comprising the dip coating apparatus of this invention, it is preferable that the surrounding surface and convex-shaped part of an accommodating means are comprised from the metal plate which has the punching hole as a some opening part.
With this configuration, when the storage means is immersed in the coating treatment liquid in the immersion tank while the mechanical strength of the storage means is maintained above a certain level, the coating treatment liquid enters the storage means. It becomes easy to do.
Moreover, when comprised in this way, when the accommodating means is pulled up from the coating treatment liquid and then rotated by the rotating member, excess coating treatment liquid can be efficiently removed.
Furthermore, by comprising in this way, the intensity | strength of an accommodation means can be improved, for example, even when it is a case where the large amount of to-be-processed objects whose total weight is 80 kg or more are accommodated, it rotates stably. be able to.

Further, in configuring the dip coating apparatus of the present invention, it is preferable that the rotating means is provided with a disc brake for suddenly stopping the rotating means while rotating the accommodation means while rotating.
By comprising in this way, an excess coating process liquid can be removed more effectively.

In another aspect of the present invention, a predetermined amount of processing object charging device and a predetermined amount of processing object are immersed in a coating treatment liquid stored in an immersion tank in a state of being stored in a storage unit. A dip coating apparatus having a coating layer and a processing object recovery apparatus on the circumference of the virtual circle at predetermined intervals, and the object to be processed is accommodated in the accommodating means. In order to perform the input of the workpiece, the dip coating of the workpiece, and the recovery of the workpiece while rotating along the circumference of the virtual circle around the rotation axis in the first vertical direction. A composite dip coating device,
The workpiece input device comprises a conveying device having a ramp for charging a predetermined amount of the workpiece into the processing object storage means,
The dip coating apparatus rotates or reciprocates the driving means for immersing the accommodating means in the state where the object to be treated is contained in the coating treatment liquid and the accommodating means about the second vertical rotation axis. A rotating means for removing excess coating treatment liquid, and a convex portion having a predetermined space inside is provided on the bottom surface of the accommodating means, and the peripheral surface and the convex portion of the accommodating means are covered. Provided with a plurality of openings for the treatment liquid to communicate,
Furthermore, the processing product recovery apparatus has a rotating means for taking out the processing object by tilting the storage means storing the processing object,
Is a composite dip coating apparatus characterized by

That is, since the composite dip coating apparatus of the present invention includes a predetermined dip coating apparatus, a large amount of objects to be processed can be dip coated in a lump, and centrifugal force can be used at that time. Or, since an airflow that moves toward the outside from the convex portion through the inside of the housing means is generated in the housing means, it is used to efficiently remove excess coating treatment liquid, A coating layer having a uniform thickness can be stably formed for each workpiece.
In addition, a predetermined throwing device and a predetermined rotary dropping device are provided, and these are divided into three on the circumference of the virtual circle so that the center angle between them is 120 ° (± 20 °), for example. Therefore, the processing object can be efficiently moved sequentially at a predetermined location in order to synchronize the dip coating process with its pre-process and post-process in a short tact time. Can be efficiently manufactured.

Further, in configuring the composite dip coating apparatus of the present invention, it has moving means, and by the moving means, it moves horizontally from a rotation stop position on the circumference of the virtual circle to a predetermined position outside the virtual circumference. Then, it is preferable to rotate the accommodating means about the second vertical rotation axis.
By configuring in this way, it is easy to smoothly move only the accommodating means that is a considerable heavy object as a whole, which accommodates the unprocessed object by the moving means, and attach it to the rotating means, It is also easy to remove the accommodating means that accommodates the processed object from the rotating means and move it smoothly.

Further, in configuring the composite dip coating apparatus of the present invention, a drying device is provided at the end of the processing product recovery device, and the processing product provided with the coating layer is placed in the middle of the drying device by gravity. It is preferable that an impact applying device for dropping in the direction is provided.
By comprising in this way, it becomes possible to heat-process a processed material immediately and it can prevent that adjacent processed materials adhere | attach through a to-be-processed object.
Further, even if adjacent processed objects are bonded via the object to be processed, they can be effectively separated by the impact applying device.

Still another aspect of the present invention provides a drive means for immersing the storage means in a state in which the object to be processed is stored in the coating treatment liquid, and the storage means by rotating the storage means around the vertical rotation axis. A rotating means for removing the excess coating treatment liquid by reciprocating rotation, and a convex portion having a predetermined space inside is provided on the bottom surface of the accommodating means, and the peripheral surface and the convex portion in the accommodating means And using a dip coating apparatus provided with a plurality of openings for allowing the coating treatment liquid to communicate, in the coating treatment liquid contained in the immersion tank in a state where a predetermined amount of object to be treated is contained in the accommodation means. The dip coating method is a dip coating method comprising the following steps (a) to (d):
(A) The step of accommodating the object to be treated in the accommodating means (b) The step of immersing the accommodating means in the state of accommodating the object to be treated in the coating treatment liquid accommodated in the immersion tank (c) The accommodating means, The step (d) of pulling up from the coating solution is rotated by the rotating means in the immersion tank, and the centrifugal force and the air flow generated from the convex portion toward the outside of the containing means are used in the containing means. And removing excess coating solution adhering to the workpiece

That is, according to the dip coating method of the present invention, since a predetermined dip coating apparatus is used, a large amount of objects to be processed can be dip coated at a time, and centrifugal force can be used at that time. .
In addition, since an airflow is generated that moves outward from the convex portion in the housing means through the inside of the housing means, it is used to efficiently remove excess coating treatment liquid, A coating layer having a uniform thickness can be stably formed for each workpiece.

In carrying out the dip coating method of the present invention, in the step (b), it is preferable that the container is rotated by a rotating means while being immersed in the coating treatment liquid.
By carrying out in this way, it is possible to reduce the variation in the thickness of the coating layer due to unevenness in the concentration of the coating treatment liquid, and even to a small object having an opening such as a nut. A coating layer having a sufficient thickness can be formed stably.

In carrying out the dip coating method of the present invention, in the step (d), it is preferable to switch the rotation direction after suddenly stopping the rotating accommodation means.
By carrying out in this way, it is effective even for a small object to be processed or an object having an opening among a large amount of objects to be processed accommodated in the accommodating means. Can be coated with a coating solution.

FIG. 1 is a diagram for explaining the operation of the dip coating apparatus of the present invention (part 1). FIG. 2 is a diagram for explaining another operation of the dip coating apparatus of the present invention (part 2). FIG. 3 is a diagram for explaining still another operation of the dip coating apparatus of the present invention (part 3). FIGS. 4A to 4B are diagrams provided for explaining a configuration example of the accommodating means. FIG. 5 (a) is a diagram for explaining a moving means including a rail-like member, FIG. 5 (b) is a plan view of the rail-like member, and FIG. 5 (c) is a rail-like member. It is a front view of the state which attached the accommodating means to the moving means containing this. FIG. 6 is a diagram for explaining the operation of the accommodating means by the moving means including the rail-like member. Drawing 7 is a figure offered in order to explain a position adjustment member which adjusts a height position of a dipping tank. FIG. 8 is a diagram for explaining a planar state of the composite dip coating apparatus. FIGS. 9A and 9B are diagrams for explaining the horizontal position adjusting means for preventing the inclination of the accommodating means and the like. FIG. 10 is a diagram for explaining a planar state of a composite dip coating apparatus including a heating device at an end. FIG. 11 is a diagram for explaining the operation of the storage means in the processing product recovery apparatus. FIG. 12 is a diagram for explaining a heating device coupled to an end of the composite dip coating device. FIG. 13 is a diagram for explaining a conventional dip coating apparatus (part 1). FIG. 14 is a diagram for explaining a conventional dip coating apparatus (part 2). FIG. 15 is a diagram for explaining a conventional tumbler coating apparatus.

[First Embodiment]
In the first embodiment, as shown in FIGS. 1 to 3, a predetermined amount of an object to be processed is immersed in the coating treatment liquid 31 stored in the immersion tank 30 in a state of being stored in the storage means 12. The dip coating apparatus 10 is a dip coating apparatus 10 having a coating layer, and a dip tank moving unit 32 for immersing the container 12 in a state in which the object to be processed is stored in the coating liquid 31. , A rotating means 25 for rotating or reciprocating the containing means 12 around a vertical rotation shaft 23 to remove excess coating treatment liquid, and a bottom surface 12a of the containing means 12 A convex portion 14 having a predetermined space is provided, and a plurality of openings (not shown) are provided in the peripheral surface 12c and the convex portion 14 of the accommodating means 12 for allowing the coating treatment liquid to communicate therewith. Dip coating It is a device 10.
Hereinafter, the dip coating apparatus as the first embodiment and the object to be processed and the constituent means (immersion tank, accommodating means, driving means, rotating means) will be specifically described with reference to the drawings as appropriate. To do.

  FIG. 1 is a diagram for explaining an example of the operation of the dip coating apparatus 10, and the accommodating means 12 in the dip coating apparatus 10 is moved by the moving means (first vertical rotation shaft 42) 40. A state at a predetermined stop position (P2 in FIG. 8) with respect to the immersion tank 30 that rotates and moves along the circumference of the virtual circle (φ in FIG. 8) and contains the coating treatment liquid 31. FIG.

  FIG. 2 is a diagram provided for explaining another example of the operation of the dip coating apparatus 10, in which the storage means 12 is moved from the predetermined stop position in FIG. 1 (P 2 in FIG. 8) to the immersion tank 30. When a horizontal movement is made to a position close to (P3 in FIG. 8), a rail-like member (first rail-like member) 18 that is a part of the moving means of the accommodating means 12 extends in the horizontal direction and rotates. It is a figure which shows the state joined with another rail-shaped member (2nd rail-shaped member) 24 provided under the drive part 27. FIG.

  Further, FIG. 3 is a view for explaining still another example of the operation of the dip coating apparatus 10, and the accommodating means 12 is arranged along the connected rail-like members 18, 24 by a pressing means (not shown). ) Is moved horizontally and moved below the rotating member 22 and then only the first rail-like member is separated from the second rail-like member and returned to the initial position (P2 in FIG. 8). FIG.

1. Object to be treated The object to be treated that can be applied to the dip coating apparatus is not particularly limited. For example, metal parts such as bolts, nuts, washers, plate-like objects, rod-like objects, deformed-shaped articles, motor cores, Ceramic parts, resin parts and the like are preferred.
In addition, the dip coating device can be used to make the surface more uniform or thicker for surface-treated products such as metal parts, ceramic parts, and resin parts that have been roughly surface-treated once. Such a surface-treated product is also one of the objects to be treated.

Moreover, although the total weight of the to-be-processed object accommodated in an accommodating means is based also on the form, material, etc. of a to-be-processed object, it is usually preferable to set it as the value within the range of 1-150 kg.
The reason for this is that by setting the total weight of the objects to be processed collectively to a value within this range, the excess coating treatment liquid adhering to the objects to be processed can be efficiently removed, and individual objects to be processed On the other hand, it is because a uniform coating layer can be formed stably.
That is, when the total weight of the objects to be processed becomes a value of less than 1 kg, the amount of objects to be processed that can be dip coated at a time is reduced, and the processing efficiency may be excessively lowered. On the other hand, when the total weight of the objects to be processed exceeds 150 kg, it becomes difficult to stably rotate the storage means, and the excess coating treatment liquid adhering to the objects to be processed is efficiently removed. This may be difficult.
Therefore, the total weight of the objects to be processed accommodated in the accommodating means is more preferably set to a value within the range of 10 to 100 kg, and further preferably set to a value within the range of 50 to 80 kg.

2. Container (1) Basic Configuration As shown in FIGS. 1 to 3, the dip coating apparatus 10 has a basic configuration in which the object to be processed is applied to the coating treatment liquid 31 in a state where the object to be processed is stored. The container is characterized in that the container 12 is provided as a container for rotating the object to be processed so that the object to be processed and the coating treatment liquid 31 are in uniform contact with each other.
Specifically, the bottom surface 12a, the inclined surface 12b on the bottom surface, and the peripheral surface 12c have a plurality of openings (not shown), and the central portion of the bottom surface 12a of the housing means 12 is the internal direction of the housing means 12 It is characterized by comprising a receiving means 12 formed with a convex portion 14 extending in the direction.
The reason for this is that the container 12 is provided in the coating treatment liquid 31 in the immersion bath even when a dip coating process is performed on a large amount of objects to be processed. This is because the coating treatment liquid 31 can be easily applied to the object to be processed by being immersed in the substrate.

Further, in the case of the storage unit 12, after the dip coating process is performed, the storage unit 12 is pulled up from the coating treatment liquid 31, and then rotated by the rotation unit 25, so that the excess coating process adhered to the object to be processed. The liquid 31 can be removed efficiently.
More specifically, in the case of the accommodation unit 12, the rotation is generated by the rotation unit 25 to generate centrifugal force and the convex portion 14 toward the circumferential direction of the accommodation unit 12 inside the accommodation unit 12. It is possible to remove the excess coating treatment liquid 31 adhering to the object to be processed while scattering using the airflow.
Therefore, even when a large number of objects to be processed are collectively applied by the dip coating apparatus 10, a coating layer having a uniform thickness can be stably formed on each object to be processed. .

(2) Opening As also understood from the plan view shown in FIG. 4A and the side view shown in FIG. 4B, the bottom surface 12a and the peripheral surface 12c of the accommodating means 12 are made of a metal plate, A plurality of openings 15 are preferably provided by punching or the like.
The reason for this is that when the storage means is immersed in the coating treatment liquid in the immersion tank, the coating treatment liquid can easily enter the storage means by adopting such a configuration of the storage means. This is because, when the container is pulled up from the coating treatment liquid and then rotated by the rotating member, excess coating treatment liquid can be efficiently removed.
On the other hand, if it is the structure of such a storage means, even if it is a case where a plurality of openings are provided, and further, even when a large amount of processing object is charged, without excessive deformation, This is because the predetermined form can be maintained.

Moreover, as a metal plate which comprises the surrounding surface and bottom face of an accommodating means, for example, an aluminum plate, an aluminum alloy plate, a stainless plate, a nickel plate, an iron plate, a zinc plate, a copper plate, and the surface of these metal plates were plated. Examples thereof include a plated metal plate and a resin-coated metal plate whose surface is coated with a resin.
The thickness of the metal plate is usually preferably a value in the range of 0.2 to 10 mm, more preferably a value in the range of 0.5 to 8 mm, and a range of 1 to 5 mm. More preferably, the value is within the range.

And it is preferable to make the diameter (equivalent circle diameter) of the opening part which an accommodating means has into the value within the range of 0.1-5 mm.
The reason for this is that when the diameter of the opening is less than 0.1 mm, it is difficult for the coating treatment liquid to enter the housing means during immersion, and when rotating by the rotating member, the coating from the housing means is performed. This is because it may be difficult to scatter and remove the processing liquid.
On the other hand, when the diameter of the opening exceeds 5 mm, it may be difficult to accommodate a relatively small object to be processed, or the mechanical strength of the accommodation unit may be excessively reduced. Because.
Therefore, the diameter of the opening in the housing means is more preferably set to a value within the range of 0.5 to 3 mm, and further preferably set to a value within the range of 1.0 to 2 mm.
Note that the planar shape of the opening included in the housing means is not particularly limited, and may be, for example, a circle, an ellipse, a triangle, a quadrangle, other polygons, and an indefinite shape.

In addition, the ratio of the total area of the openings included in the storage means is not particularly limited, but is usually set to a value in the range of 5 to 80% with respect to the total surface area on the peripheral surface and the bottom surface of the storage means. It is preferable.
The reason for this is that when the ratio of the total area is less than 1%, the amount of intrusion of the coating treatment liquid into the housing means tends to decrease during immersion, and when rotating by the rotating member, This is because it may be difficult to sufficiently scatter and remove the coating treatment liquid. On the other hand, when the ratio of the total area exceeds 80%, the mechanical strength of the housing means may be easily reduced excessively.
Therefore, the ratio of the total area of the openings of the housing means is more preferably a value within the range of 10 to 60%, and even more preferably a value within the range of 20 to 40%.

(3) Convex part As shown in Drawing 4 (a)-(b), the shape of convex part 14 which has predetermined interior space 14a is made into the cylindrical type with a thin tip, or the cone type. It is preferable.
The reason for this is that, when the convex portion has such a shape, when the workpiece is accommodated in the accommodating means, mechanical damage in the convex portion due to the collision between the workpiece and the convex portion is caused. This is because it can be reduced.

Moreover, it is preferable to make the internal volume of a convex part into the value within the range of 1000-500,000 cm < ³ >.
The reason for this is that when the internal volume of the convex portion becomes a value less than 1000 cm ³ , the generation of an air flow that occurs inside the convex portion, that is, an air flow that moves through the inside of the housing means and moves toward the outside. This is because the amount becomes excessively small, and it may be difficult to scatter and remove excess coating processing liquid adhering to the object to be processed.
On the other hand, when the internal volume of the convex portion exceeds 500,000 cm ³ , the amount and shape of the object that can be accommodated in the accommodating means may be excessively limited.
Therefore, it is more preferable to set the internal volume of the convex portion within a range of 5,000～300,000Cm ^3, still more preferably a value within the range of 10,000~100,000cm ^3.

Moreover, although the height of a convex-shaped part is based also on the magnitude | size of an accommodation means, it is usually preferable to set it as the value within the range of 5-80 cm from a bottom face.
The reason for this is that when the height of the convex portion is less than 5 cm, the air flow toward the outside of the housing means through the inside of the convex portion is excessively reduced, and the excess adhered to the object to be processed. This is because it may be difficult to scatter and remove the coating treatment liquid.
On the other hand, when the height of the convex portion exceeds 80 cm, the convex portion is damaged due to a collision between the workpiece and the convex portion when the workpiece is accommodated in the accommodating means. It is because it may become easy.
Therefore, the height of the convex portion is more preferably set to a value within the range of 10 to 60 cm from the bottom surface of the housing means, and further preferably set to a value within the range of 20 to 40 cm.

(4) Overall shape of storage means The overall shape of the storage means is not particularly limited, but is substantially cylindrical as shown in FIGS. While having the surface 12c, it is preferable to have the convex part 14 in the center part of the bottom face 12a, and also to have the bottom face 12b inclined downward toward the convex part 14.
The reason for this is that by having such a peripheral surface and a bottom surface, even a small object to be processed, an object having an opening inside, or an irregularly processed object. However, this is because a predetermined impact force can be applied by the rotating means, and the coating can be applied more uniformly.

Also, as shown in FIGS. 4 (a) to 4 (b), it is generally polygonal (hexagonal) on the side opposite to the bottom surface 12a of the accommodating means, and is fitted with rail-like members 18 and 24 on both sides. It is preferable that the frame member 21 provided with the rail contact member (groove part) 21b for combining is provided.
That is, even when the outer shape of the storage means includes a curved line such as a circle, a polygonal frame member (generally a quadrangle, etc.) having a straight portion with a groove is formed on a part of the storage means, and welding or an adhesive is used. It is preferable to attach by such as.
By configuring in this way, it is possible to exert a predetermined reinforcing effect on the housing means, and to make the contact between the moving member and the rotating member strong and easy by using the linear portion of the frame member. it can.
In addition, as shown in FIGS. 4A to 4B, it is preferable that a flange 21 a is provided for reinforcement further below the frame member 21 and around the accommodating means 12.

In addition, when the accommodating means is substantially cylindrical, it is usually preferable to set the diameter to a value within the range of 20 to 160 cm, more preferably within the range of 40 to 120 cm, and 60 to 80 cm. It is more preferable to set the value within the range.
Moreover, it is preferable to make the height of a surrounding surface into the value normally within the range of 40-180 cm, it is more preferable to set it as the value within the range of 50-150 cm, and it is set as the value within the range of 60-120 cm. More preferably.
Therefore, the capacity of the storage means is preferably set to a value within the range of 10 to 10,000 liters, more preferably set to a value within the range of 100 to 5,000 liters, and a range of 500 to 1,000 liters. More preferably, the value is within the range.

In addition, the inclination angle θ when the bottom surface has an inclined portion is preferably a value within a range of 5 to 45 ° with respect to the horizontal direction, and more preferably a value within a range of 10 to 30 °. Preferably, the value is in the range of 15 to 25 °.
Furthermore, it is preferable to change the inclination angle θ depending on the form of the object to be processed.
For example, if the object to be processed has no opening inside and a relatively large surface area such as a bolt or a metal plate plate, the liquid to be processed is likely to adhere to the surface. It is characterized in that the liquid to be treated tends to adhere uniformly when it is relatively suppressed. Therefore, when the object to be processed is a bolt, a metal plate, or the like, the inclination angle θ is preferably set to a value in the range of 5 to 15 °.
On the other hand, if the object to be processed has an opening or groove inside, such as a nut or screw, or if the surface area is relatively small, the liquid to be processed is likely to enter the inside excessively or easily adhere to the surface. For this reason, there is a feature that adjacent treatment objects are less likely to adhere to each other when the impact generated by the rotation process is relatively large. Therefore, when the object to be processed is a nut, a screw, or the like, the inclination angle θ is preferably set to a value in the range of more than 15 to 45 °.

3. Rotating means As shown in FIG. 1, the dip coating apparatus 10 fixes the accommodating means 12 by a fixing means (not shown) and also has a vertical rotating shaft (second vertical rotating shaft) 23. And a rotation means 25 including a rotation drive means 22 for rotating the storage means 12 through a rotation drive unit 27.
The reason for this is that, by constructing in this way, the container means in the state in which the object to be treated is accommodated is pulled up from the coating treatment liquid, and then rotated by the rotating means having such a rotation drive unit, thereby allowing the object to be treated. This is because the excess coating solution that has adhered can be efficiently removed.
In addition, when immersing the storage means containing the object to be processed in the coating treatment liquid, by rotating by the rotating means, among the large number of objects to be processed, those buried inside, This is because the coating treatment liquid can be efficiently applied.

Further, as shown in FIG. 1, the rotating means 25 is approximated to the outer shape so that the accommodating means 12 can be easily fixed, and for example, the rectangular rotation driving unit 27 and the accommodating means 12 are firmly fixed. It is preferable that a fixing means (not shown) is provided and a rectangular rotation driving unit 27 and the like are positioned above an immersion tank 30 described later.
The reason for this is that, by configuring in this manner, the storage means that is a considerable heavy object in the state in which the object to be processed is stored is firmly fixed to the rotation drive unit via the fixing means, and the immersion tank is in that state. This is because the object to be processed is immersed in or raised from the inner coating treatment liquid.
Note that an electric motor, an air motor, an engine, or the like can be used as the rotation driving means 22 described above.

Further, as shown in FIG. 1, the rotation drive unit 27 in the rotation unit 25 removably fixes the storage unit 12 via a fixing unit (not shown) such as a hook, a clamp member, or a guide rail. It is preferable.
The reason for this is that the storage means in which the unprocessed object is stored is firmly fixed to the rotating means via the fixing means (not shown), soaked in the coating treatment liquid, and excess coating treatment liquid. This is because, after the removal, the housing means can be removed from the rotating member and can be efficiently transferred to the next process such as a drying process.

Moreover, as shown in FIG. 1, it is preferable that the rotation drive unit 27 in the rotation unit 25 further includes a disc brake 26 that can switch the rotation direction and that suddenly stops the storage unit in the rotation state.
The reason for this is that the extra coating treatment liquid can be more effectively removed by such a configuration.
That is, in addition to the centrifugal force and the air flow generated from the convex portion toward the outside of the accommodating means in the accommodating means, and further, the inertia force generated by suddenly stopping the accommodating means in the rotating state, This is because the excess coating treatment liquid adhering to the workpiece can be scattered and removed more efficiently.
In addition, the position of the object to be processed in the storage means is shifted by the inertial force, and the remaining coating treatment liquid that cannot be scattered and removed due to the positional relationship between the objects to be processed is changed to a state where it can be easily scattered and removed. Can be made.
Therefore, the coating treatment liquid that is in a state in which it can be easily scattered and removed can be more efficiently scattered and removed by switching the rotation direction after suddenly stopping the accommodating means in the rotating state.
In addition, the effect mentioned above is exhibited as an effect which improves application | coating efficiency, when a coating processing liquid is dip-applied with respect to a to-be-processed object.

4). Immersion Tank As shown in FIG. 1, the dip coating apparatus 10 includes an immersion tank 30 for immersing an object to be processed (not shown) in the coating treatment liquid 31.
The reason for this is that a large amount of treatment is performed by immersing the accommodation means in the state in which the untreated workpiece is accommodated in the coating treatment liquid accommodated in the immersion tank. This is because the coating treatment liquid can be applied to the object all at once.

Moreover, as shown in FIG. 7, it is preferable that the immersion tank 30 can be moved up and down by an immersion tank moving means 32 which is a position adjusting member (jack).
The reason for this is that by allowing the immersion tank to move up and down in this way, the storage means fixed to the rotating member can be easily immersed in the coating treatment liquid in the immersion tank or pulled up. is there.
However, since the same effect can be obtained, the immersion tank may be fixed and the rotating member may be moved up and down.

In addition, it is preferable that the height of the immersion tank is a value that is at least twice the height of the housing means.
The reason for this is that the housing means in a state where the object to be processed is immersed in the coating treatment liquid in the immersion tank is exposed to the outside of the immersion tank by configuring in this way. This is because they can be pulled up and rotated by the rotating means in that state.
Moreover, it is because the excess coating processing liquid which should be removed can also be collect | recovered in an immersion tank as it is by the inner wall of an immersion tank.

5. Moving means The dip coating apparatus further includes moving means for moving the containing means to a predetermined location in a state where the containing means is detachably mounted on the reinforcing support member.
More specifically, as shown in FIG. 5A, the rotary shaft (first rotary shaft in the vertical direction) 42 as the main part of the moving means 40 is connected to the rotary shaft 42 and is substantially triangular. And a supporting member 43 for accommodating means for cantilevering the accommodating means 12 via the reinforcing supporting member (reinforcing plate) 16 and the like.
Further, as shown in FIG. 5 (b), the moving means 40 includes a rail-like member 18 whose planar shape is generally U-shaped or U-shaped, and moves the accommodating means 12 in the horizontal direction. It is easy.
Further, as shown in FIG. 5 (c), the moving means 40 uses the rail contact members (grooves) 21b provided on both sides of the flange 21a and the frame member 21 in the horizontal direction. While holding, it has the square pillar-shaped reinforcement member 16a, The surface is provided with the bearing member 20, The rail-shaped member 18 (18b, 18c, 18d) is hold | maintained through it via it.

That is, as shown in FIG. 8, along the circumference of the virtual circle (φ), from the place (P1) to which the workpiece is introduced to the dip coating position (P2), or the recovery position from the dip coating position (P2). The moving means 40 is provided for smoothly moving from the stop position (P2) when performing the dip coating process to the position (P3) for performing the dip coating process until (P4).
By providing such a moving means, the accommodating means, which is a considerable heavy object containing the object to be processed, can be smoothly moved, and at the dip coating position, it can be accurately attached to the rotating means, and the processed object can be treated. This is because the storage means storing the processed product can be removed from the rotating means and moved to move to the next drying step or the like.
Here, the movement operation of the storage means (partly including dip coating treatment) by the movement means will be specifically described below.

(1) First, as shown in FIG. 8, at a predetermined position (P1), a predetermined storage means 12 is prepared, and an unprocessed workpiece is stored while being weighed by a weight measuring means (balance) 13. . This accommodation operation will be described more specifically in the second embodiment.

(2) Next, as shown in FIG. 8, the container 12 is kept at a predetermined position (P2) on the circumference of the virtual circle (φ) with respect to the immersion tank 30 of the dip coating apparatus 10 while maintaining the horizontal state. ).

At that time, it is preferable to provide a predetermined horizontal position adjusting means to prevent the housing means from shaking in the left-right direction or from shifting the front-rear position.
For example, as shown in FIG. 8, when the accommodating means 12 is rotationally moved from the predetermined position (P1) to the predetermined position (P2) along the circumference of the virtual circle (φ), the accommodating means 12 If the position (including the horizontal position and right / left inclination) is shifted, the accommodating means 12 and the rail-shaped member 18 are moved by the operation of the pressing member driving device 46 as shown in FIG. It becomes difficult for the rail retainer 46b to smoothly move horizontally to a predetermined position (P3) for dip coating.
On the other hand, if the position of the storage means 12 is shifted after the dip coating is performed, the storage means 12 and the rail-shaped member 18 are moved by pressing the storage means pressing device 46 as shown in FIG. It becomes difficult for 46a and the rail presser 46b to smoothly move horizontally and return to a predetermined position (P3) before dip coating is started.

Therefore, if the positioning pin 33 as the horizontal position adjusting means as shown in FIG. 9A is provided, the position of the accommodating means 12 can be determined accurately and easily.
More specifically, the positioning pin 33 is provided in a part of the moving means 40, and when the accommodating means 12 moves and comes to a predetermined place, the positioning pin 33 moves forward in a predetermined direction and is positioned. By physically fitting with the pin receiver 34, the position of the accommodating means 12 can be determined accurately and easily.
Further, if the horizontal position adjusting means includes such a positioning pin 33 and a positioning pin receiver 34, even if it is a simple configuration, the container means that is a heavy object that accommodates the workpiece is rotated. When moved, the positioning can be performed extremely accurately and quickly.

Further, as shown in FIG. 9B, a positioning member 33 ′ having a positioning member 34 ′ having two V grooves 34a ′ and 34b ′ in parallel and two positioning rotary bearings 33a ′ fitted thereto. Therefore, it is also preferable that the horizontal position adjusting means is configured.
That is, a positioning member 33 ′ having two positioning rotary bearings 33 a ′ is provided in a part of the accommodating means 12 and a part of the moving means 40, and two V grooves 34 a ′ and 34 b ′ formed in parallel. A positioning member 34 ′ having is installed at a predetermined location.
With such a horizontal position adjusting means, even if the storage means 12 having a considerable weight for storing an object to be processed, the two V grooves 34a 'and 34b' formed in parallel and the two rotary bearings 33a for positioning are positioned. By fitting with ′, positioning can be performed quickly with respect to a predetermined position without lateral shaking in the left-right direction.
Therefore, even when the accommodating means 12 is moved up and down, the two positioning rotary bearings 33a ′ easily enter between the two V grooves 34a ′ and 34b ′ formed in parallel. By fitting, the position of the accommodating means 12 can be determined quickly and accurately.

(3) Next, as shown in FIG. 6, a rail-like member as a part of the moving means 40 (hereinafter sometimes referred to as a first rail-like member) while maintaining the horizontal state of the accommodating means 12. 18 is clamped by the rail presser 46b.
That is, as shown in FIG. 6, after the rail presser 46b is moved in the left direction of the arrow A by the operation of the presser member driving device 46, it is further lowered in the downward direction of the arrow B, The end 18a is clamped.
By operating in this way, the first rail-shaped member 18 can be moved horizontally by the rail presser 46b.

As shown in FIG. 5B, the first rail-shaped member 18 has, for example, a substantially U-shaped or U-shaped planar shape, and includes a right rail portion 18b and a left rail portion. It is comprised from 18c and the connection part 18d which connects them, and the space part 18e is provided in the center location so that it may not interfere with the accommodating means 12. FIG.
As shown in FIG. 5C, the first rail-shaped member 18 is a part of the moving means 42 via the bearing member 20, for example, inside the reinforcing support member (reinforcing plate) 16. Accordingly, the first rail-shaped member 18 can be moved horizontally alone, or the housing means 12 can be moved horizontally alone.

(4) Next, as shown in FIG. 6, the handle of the storage means 12 (not shown, but represented by 21d in FIG. 4) is held by holding the storage means 12 while maintaining the horizontal state of the storage means 12. 46a clamps.
That is, after the accommodating means holder 46a is moved in the left direction of the arrow C by the operation of the pressing member driving device 46, it is further lowered in the downward direction of the arrow D to clamp the handle of the accommodating means 12.
By operating in this way, the storage means 12 can be moved horizontally by the storage means presser 46a.
As shown in FIGS. 4B and 5C, the frame member 21 includes rail contact members 21b having a U-shaped cross section on both sides when viewed from the traveling direction, and Since the bearing member 21c is provided on the contact surface with the rail-like members 18 and 24, the horizontal movement of the containing means 12 alone along the rail-like members 18 and 24 is further facilitated.

(5) Next, as shown in FIG. 6, the rail holder 46b moves to the left in the direction of the arrow A while the handle of the holder 12 is clamped by the holder holder 46a, so that the first The rail-shaped member 18 advances in the left direction of the arrow F.
And the 1st rail-shaped member 18 is the horizontal direction in a part of rotation member 22, and is provided in the same height position as the 1st rail-shaped member 18, What is the 1st rail-shaped member? The different rail-like members (second rail-like member objects) 24 are engaged while being in contact with each other.

In addition, while the 1st rail-shaped member 18 and the 2nd rail-shaped member 24 engage firmly, on the other hand, it can isolate | separate easily, and also on the surface of a rail-shaped thing As shown in FIG. 5B, it is preferable to have predetermined engaging members 18f on the side portions of the rail-like members 18 and 24, respectively, so as not to form irregularities.
Further, as shown in FIG. 1 to FIG. 3, the engagement portion is arranged so that precise alignment when the first rail-like member 18 and the second rail-like member 24 are engaged is unnecessary. It is preferable that a guide member 24a is provided in the vicinity.
Accordingly, since the accommodating means presser 46a moves in the left direction of the arrow C along the engaged rail-like members 18 and 24, the accommodating means 12 advances correspondingly to just below the rotating means 25. Will move.
That is, by operating in this way, the accommodating means 12 smoothly moves horizontally along the engaged first rail-like member 18 and second rail-like member 24 even for a heavy object. It becomes possible to do.

(6) Next, as shown in FIG. 3, the frame member 21 of the housing means 12 and a predetermined stopper (not shown) provided in a part of the rotation driving unit 27 are engaged, and the housing means 12 is It is arranged at a predetermined position of the rotation drive unit 27.
And the rotational drive part 27 descend | falls below the arrow G of FIG. 6, and then the horizontal state of the accommodating means 12 is maintained by firmly clamping the accommodating means 12 with a predetermined stopper, Smooth rotation operation and reciprocation rotation operation via the rotation drive unit 27 are possible.
That is, in this state, as shown in FIG. 7, the dipping bath 30 is moved up to a predetermined position by a dipping bath moving means (jack) 32 which is a position adjusting member of the dipping bath 30 and moved to a predetermined position. The coating process can be performed efficiently. Furthermore, even if it is suddenly stopped by a disc brake or the like, the housing means 12 can be stably held.

(7) Dip coating process The rotation operation (dipping and liquid draining) when performing the dip coating process will be described in the section of the dip coating method.
In the dip coating process, after the rotation means performs a predetermined rotation operation, the first rail-like member 18 and the second rail-like member 24 are engaged again and can be connected. It is necessary to return the rotation driving unit 27 to which the housing unit 12 is fixed to a predetermined position.
Therefore, as shown in FIG. 9, a rotatable positioning rotary bearing that fits with a knock pin 33 as a positioning mechanism for stopping at a predetermined position and a positioning member 34 ′ having two V grooves 34 a ′ and 34 b ′. It is preferable to prepare 33a 'etc. and confirm whether the knock pin 33, the positioning rotary bearing 33a', etc. have returned to the positions where they can be inserted.

(8) Next, the immersion tank 30 moves downward in the direction of the arrow H in FIG. 7 and descends to the initial position. Thereafter, as shown in FIG. 6, the first rail-shaped member 18 clamped by the rail press 46 b moves forward to a predetermined position and is connected again to the second rail-shaped member 24. Next, the storage means holder 46a moves horizontally to clamp the handle of the storage means 12, and retract the storage means 12 to return it to the initial position. Then, the rail presser 46b and the housing means presser 46a release the clamps and return to the initial state.
Thus, in this way, the dip coating process for the object to be processed is once completed, and the object to be processed can be transferred to the next curing step.

6). Coating treatment liquid The coating treatment liquid contains a coating component for forming a cured coating film on the surface of the object to be treated, and is cured after the coating component is attached to the surface of the object to be treated. Thus, a liquid material capable of forming a predetermined cured coating film on the surface of the object to be processed.
Such a coating treatment liquid can contain various thermoplastic components, thermosetting components, photocuring components, or a combination thereof as a coating component.
More specifically, as the coating component, acrylic resin, urethane resin, polyimide resin, epoxy resin, oxetane resin, polyester resin, polyamide resin, phenol resin, silicone resin, etc. These may be used alone or in combination of two or more.
Furthermore, when the object to be treated is a disc brake, one or more curing components that can be polymerized with a polyimide resin precursor such as polyamic acid, a polyimide resin, and a polyimide resin such as an epoxy compound or an epoxy resin. It is preferable that it is the solution or dispersion liquid containing the polyimide resin composition containing these.

Further, as a solvent, sulfoxide solvents such as dimethyl sulfoxide and diethyl sulfoxide, N, N-dimethylformamide, N, N-diethylformamide, N, N-dimethylacetamide, N, N-diethylacetamide, N-methyl-2- Examples include polar solvents such as pyrrolidone (NMP), phenol, cresol, xinol, halogenated phenol, catechol, hexamethylphosphoramide, γ-butyrolactone (GBL), tetrahydrofuran, etc. More preferably, water or alcohol (including glycol) is used.
That is, by using water or the like as the solvent, the coating treatment liquid can be made aqueous, so that not only the manufacturing cost is reduced, but also environmental problems can be taken into consideration.
Therefore, when the coating component contained in these coating treatment liquids is solidified, it is possible to form a predetermined coating film made of polyimide resin, epoxy resin, or the like.
In addition, the concentration of the solvent or the dispersion medium in the coating treatment liquid is preferably a dilute liquid of 5 to 50% by weight, for example, with respect to the total amount of the coating treatment liquid, and a value within the range of 10 to 35% by weight. It is more preferable to set the value within the range of 15 to 25% by weight.

Moreover, it is preferable that the viscosity of the coating treatment liquid (measurement temperature: 25 ° C., hereinafter the same) is usually set to a value in the range of 10 to 10,000 mPa · sec.
This is because a coating treatment liquid having such a viscosity can uniformly adhere droplets to an object to be processed.
That is, if the viscosity of the coating treatment liquid is less than 10 mPa · sec, it may be difficult to form a coating having a uniform thickness as a whole due to the surface tension.
On the other hand, if the viscosity of the coating treatment liquid exceeds 10,000 mPa · sec, it may be difficult to remove the excess coating treatment liquid by centrifugal force.
Therefore, the viscosity of the coating treatment liquid is more preferably set to a value within the range of 50 to 5000 mPa · sec, and further preferably set to a value within the range of 100 to 1000 mPa · sec.

7). Dip coating method In addition, using the above-described dip coating apparatus, a predetermined amount of an object to be processed was immersed in a coating treatment liquid stored in a dipping tank in a state of being stored in a storage unit, and a coating layer was provided. It is the dip coating method used as a processed material, Comprising: It is preferable that the following process (a)-(d) is included.
(A) The step of accommodating the object to be treated in the accommodating means (b) The step of immersing the accommodating means in the state of accommodating the object to be treated in the coating treatment liquid accommodated in the immersion tank (c) The accommodating means, The step (d) of pulling up from the coating solution is rotated by the rotating means in the immersion tank, and the centrifugal force and the air flow generated from the convex portion toward the outside of the containing means are used in the containing means. And removing excess coating solution adhering to the workpiece

(1) Step (a)
The step (a) is a step of storing the object to be processed in the storage means, and will be specifically described in the second embodiment.

(2) Step (b)
Step (b) is a step in which the coating means is uniformly rotated by the rotating means while the containing means is immersed in the coating treatment liquid, that is, a dip coating treatment process.
By this step (b), the variation in the thickness of the coating layer due to the unevenness of the concentration of the coating treatment liquid can be reduced, and even for a small object having an opening such as a nut, it is uniform. A coating layer having a thickness can be stably formed.
The rotational operation and the reciprocating rotational operation of the rotating member are not particularly limited.For example, the rotational member rotates clockwise at a low speed a plurality of times, then stops, and then stops counterclockwise. It is preferable to repeat this rotation cycle 1 to 10 times after rotating at low speed a plurality of times and further stopping.

(3) Step (c)
Step (c) is a step of lifting the storage means from the coating treatment liquid. That is, in the step of the arrow H in FIG. 7, the immersion tank moving means 32 (jack) is reduced, the position of the immersion tank 30 is lowered, and the object to be processed in the storage means 12 is brought into a non-immersion state. is there.

(4) Step (d)
Step (d) is a liquid running-out step for removing excess coating solution by rotating the containing means at high speed with a rotating member using centrifugal force and airflow.
That is, the accommodating means is in the immersion tank but is rotated at high speed by the rotating means in the non-immersed state, and centrifugal force is generated from the convex portion toward the outside of the accommodating means in the accommodating means. This is a step of removing excess coating processing liquid adhering to the object to be processed using an air flow.
Specifically, as shown in FIG. 4 (b), when the accommodating means 12 is rotated at a high speed, a predetermined centrifugal force is generated and the pressure is reduced, so that the outside air is indicated by an arrow R. The inside of the convex portion 14 enters from the opening corresponding to the convex portion 14 below.
Next, the outside air that has entered the inside of the convex portion 14 is further pushed out by the centrifugal force through the opening of the convex portion 14 and the peripheral surface 12c, as indicated by the arrow R ′. become.
Therefore, the airflow generated in the direction toward the outside of the storage means invades between the overlapping objects to be processed, and the excess coating processing liquid adhering to the objects to be processed is efficiently removed. Can do.
In addition, the rotation condition of the rotating member when removing the excess coating treatment liquid adhering to the object to be processed is not particularly limited. For example, it is rotated clockwise at a high speed a plurality of times, and then rotated. After stopping, it is preferable to rotate it counterclockwise a plurality of times at a high speed, and further stop and then repeat this rotation cycle 1 to 10 times.

In addition, in the step (d), it is preferable to switch the rotation direction after the storage means in the rotated state is suddenly stopped by a disc brake or the like.
The reason for this is that, by carrying out in this way, among a large amount of objects to be processed accommodated in the accommodating means, even for small objects to be processed and objects to be processed that have openings. This is because the coating treatment liquid can be effectively coated.

[Second Embodiment]
In the second embodiment, as shown in FIG. 8 or FIG. 10, a predetermined amount of the object to be processed 50 is accommodated in the immersion tank 30 in a state where the object to be treated is accommodated in the accommodating means 12. A dip coating apparatus 10 that is immersed in a coating treatment liquid to form a treated product having a coating layer, and a treated product recovery device 12 '(80) are arranged at predetermined intervals on the circumference of a virtual circle (φ). In addition, the object to be processed is rotated and moved along the circumference of the virtual circle (φ) around the rotation axis 42 in the first vertical direction while the object to be processed is accommodated in the accommodating means 12. This is a composite dip coating apparatus 100 for loading an object, dip coating the object to be processed, and collecting the object to be processed.
And it is the composite dip coating apparatus 100 characterized by having the following structures (1)-(3).
(1) As shown in FIG. 8, the workpiece input device 50 includes a workpiece transport means 52 having a ramp for feeding a predetermined amount of the workpiece into the workpiece storage means 12. ing.
(2) As shown in FIG. 1, the dip coating apparatus 10 includes an immersion tank moving means 32 for immersing the storage means 12 in a state where the object to be processed is stored in the coating treatment liquid, and the storage means 12. A rotating means 25 for rotating or reciprocatingly rotating around the second vertical rotation axis 23 to remove excess coating treatment liquid, and a predetermined space is provided in the bottom surface 12a of the containing means 12 The convex portion 14 is provided, and the peripheral surface 12c and the convex portion 14 of the accommodating means 12 have a plurality of openings for allowing the coating treatment liquid to communicate therewith.
(3) As shown in FIG. 11, the processing product collection device 44 has a rotating means 43 for taking out the processing object by inclining the storage means 12 storing the processing object in the lateral direction.
Hereinafter, with reference to the drawings as appropriate, the composite dip coating apparatus 100 according to the second embodiment is omitted as appropriate with respect to the contents overlapping with the dip coating apparatus 10 of the first embodiment, and other parts are mainly described. This will be described in detail.

1. Loading Device (1) Basic Configuration A composite dip coating apparatus 100 shown in FIG. 8 or FIG. 10 includes a loading device 50 for loading an unprocessed workpiece into the storage means 12 while measuring the weight. It is characterized by providing.
The reason for this is that by providing such a charging device, it is possible to always stably store a workpiece having a constant weight with respect to the storage means, and in the case of processing a large amount of the workpiece in a lump. However, it is because a uniform coating layer can be stably formed with respect to each to-be-processed object.

(2) To-be-processed object conveyance means Moreover, the input device is equipped with the to-be-processed object conveyance means for accommodating the to-be-processed object to be accommodated in the accommodation means while conveying the to-be-treated object to the upper part of the accommodation means.
That is, as shown in FIG. 8, the input device 50 has a workpiece transport means 52, and the workpiece transport means 52 is a stacking member (planar) for loading the workpiece. (Roof-like object) 52 ', a drive member (chain crane) 53 for moving the stacking member 52' up and down, and a support member 54 for supporting the stacking member 52 'moving up and down are preferable. .
This is because the input device 50 includes the workpiece transporting means 52 so that even a large amount of unprocessed workpieces having a considerable weight can be efficiently accommodated in the housing means. is there.

(3) Weight Measuring Means As shown in FIG. 8, the input device 50 includes a weight measuring means (balance) 13 for measuring the weight of the workpiece accommodated in the accommodating means 12. preferable.
That is, the weight measuring means has a placement portion for placing the accommodation means, and is positioned below the stacking member conveyed upward by the workpiece conveying means.

2. Dip Coating Device Also in the composite dip coating device, the dip coating device can have the same configuration as the dip coating device of the first embodiment.
Therefore, the description of the aspect of the dip coating apparatus is omitted here because it overlaps with the description of the aspect of the first embodiment.

3. Retrieval Device (1) Positional Relationship As shown in FIG. 8, it is preferable to provide the treated product collection device 12 ′ at a predetermined position (P4) on the circumference of the virtual circle (φ).
That is, it is preferable to provide each on the circumference of an imaginary circle (φ) so that the central angle formed by the processing material recovery device 12 ′ and the predetermined charging device 50 is 120 ° ± 20 °. More specifically, as shown in FIG. 8, the angle formed by the virtual center line L1 and L3 is preferably about 120 °.
Similarly, the center of the processing object collection device 12 ′ and the predetermined dip coating device 10 is provided on the circumference of a virtual circle so that the central angle is 120 ° (± 20 °). Is preferred. More specifically, as shown in FIG. 8, the angle formed by the virtual center line L1 and L2 is preferably about 120 °.

(2) Rotating and dropping operation Here, as shown in FIG. 11, in the collection device 80, the accommodating means 12 that accommodates the processing object is rotated along the horizontal rotating shaft 43 and tilted in the lateral direction. It is preferable to have a rotary dropping device configured to take out a processed product by dropping it.
More specifically, the rack and pinion mechanism is used to rotate the container 12 having a considerable weight, which accommodates the processed material, in the direction indicated by the arrow in order to rotate smoothly at a low speed. A rotation feed device (rack) 44 having a gear (pinion) with respect to the rotation shaft and having a gear (not shown) meshing with the gear (pinion), and the rotation feed device 44 are indicated by an arrow E. It is preferable to include a driving device 45 for driving in the downward direction.

That is, in order to rotate the accommodating means 12 in the direction of the arrow N in FIG. 11, the rotation feeding device 44 is pulled in the downward direction of the arrow E.
On the other hand, in order to rotate the accommodating means 12 in the direction opposite to the direction of the arrow N, the rotation feeding device 44 is pushed up in the upward direction of the arrow E.
The rotation feeding device 44 and the driving device 45 also function as position sensors. That is, a substantially rectangular or circular hook-like object 44 a is provided at the lower end of the rotation feeding device 44 and is configured to engage with the tip 45 a of the driving device 45.
Therefore, even if the accommodating means 12 is rotated and stopped at a predetermined position in the collection unit, if it is not the correct position, the hook-like object 44a provided at the lower end of the rotation feeding device 44 and the driving device 45 are provided. It does not engage with the tip 45a. Accordingly, it is possible to prevent the rotating feeding device 44 from being operated and rotating the accommodating means 12 by mistake.

(3) Processing after dropping Note that the manner of dropping the processed object 11 ′ is not particularly limited, and a predetermined container or a container having the same or similar form as the accommodating means as shown in FIG. 12 ', or a predetermined conveying device (for example, a stainless steel belt conveyor) 122 as shown in FIGS.

4). Moving Means The composite dip coating apparatus 100 has the moving means 40 described in the first embodiment.
Therefore, as shown in FIG. 8, after the accommodating means 12 is rotationally moved to the rotation stop position (P2) on the circumference of the virtual circle (φ) by the moving means 40, the circumference of the virtual circle (φ) It is horizontally moved to a predetermined position (P3) outside.
Then, the housing means 12 is rotated about the rotation axis (second vertical rotation axis) 23 of the rotation means 25 to perform dip coating processing or the like.

5. Drying apparatus Moreover, it is preferable that the drying apparatus is provided in the edge part of the collection | recovery apparatus of a processed material. And it is preferable that the impact provision apparatus which drops the processed material provided with the coating layer in the gravity direction is provided in the middle of the said drying apparatus.
That is, as shown in FIG. 12, it is preferable to provide a drying device 110 (120, 140) including a processed product moving device 122 at the end of the composite dip coating device 100.

Further, as shown in FIG. 12, it is preferable that the drying device 110 is divided into a first drying device 120 and a second drying device 140.
That is, the first moving device 122 of the processed product in the first drying device 120 is provided substantially in the horizontal direction, and the drying process is performed while being transferred in the direction of the arrow J. At that time, it is preferable to set the drying temperature in the first drying device 120 to a relatively low temperature, for example, a temperature range of 60 to 150 ° C., and to mainly remove the solvent and the like contained in the coating layer.
In addition, the second moving device 142 of the processed product in the second drying device 140 is inclined such that the position rises along the traveling direction (arrow K) by the inclination forming member 144 (with respect to the horizontal direction, The inclination angle is 3 to 20 °. And it is preferable that the drying temperature in the second drying device 140 is set to a relatively high temperature, for example, a temperature range of 180 to 300 ° C., and the thermosetting component contained in the coating layer is mainly completely cured.

In addition, a step (height: 10 to 100 cm) as the impact applying device 160 is provided between the first drying device 120 and the second drying device 140, and the processed product is provided with a coating layer. It is preferable that it is the structure which drops in gravity direction.
The reason for this is that by providing a drop-type impact applying device in this way, even when a plurality of processed objects having a coating layer are bonded to form a lump, a predetermined impact force is used. This is because it can be efficiently separated into individual processed products.
Further, by providing such a drop-type impact applying device, the length of the drying device can be substantially increased, and the curing treatment can be performed more completely.

6). Composite dip coating method Further, using the above-described composite dip coating apparatus, a predetermined amount of an object to be processed is immersed in a coating treatment liquid stored in an immersion tank in a state of being stored in a storage means, and a coating layer is formed. It is a dip coating method for providing a processed product, and preferably includes the following steps (a ′) to (e ′).
(A ′) A step of storing the object to be processed in the storage means while weighing the object (b ′) The storage means in a state in which the object to be processed is stored is moved along the circumference of the virtual circle by the moving means. Step (c ′) of immersing in coating treatment liquid accommodated in dipping bath after rotational movement to position (c ′) Step of pulling up accommodation means from coating treatment liquid (d ′) Rotating means in non-immersion state The excess coating treatment liquid adhered to the object to be processed by utilizing the centrifugal force and the airflow moving from the convex portion in the containing means toward the outside through the inside of the containing means (E ') The step of recovering the processed product after the accommodating means is rotated and moved to a predetermined position along the circumference of the virtual circle by the moving means.

(1) Steps (a ′) to (d ′)
Steps (a ′) to (d ′) are different from steps (a) to (d) described in the first embodiment regarding the operation of rotating and moving the storage means to a predetermined position, but the other steps are substantially the same. The description here is omitted.

(2) Step (e ′)
The step (e ′) is a step of recovering the processed product after the storage unit is rotated and moved to a predetermined position by the moving unit, and the processing product recovery device tilts the storage unit storing the processed product. This is a step of dropping the processed material and taking it out.
That is, as shown in FIG. 8, the moving means 40 including the first rotating shaft 42 moves from the dip coating place (P2, P3) to the collection place (P4) along the circumference of the virtual circle (φ). Until the receiving means 12 is rotated. In that case, the accommodating means 12 and the rail-shaped member 18 should just be fixed to the moving means 40, respectively.
Therefore, if the storage means holder 46a and the rail holder 46b are unclamped, the collecting operation in the next process can be performed quickly.

Next, as shown in FIG. 11, the storage means 12 that stores the processing object is gradually rotated at a constant speed in the arrow direction N by a rack and pinion method to drop the processing object, and thereby a large amount of The processed product can be efficiently recovered.
In addition, even when a plurality of processed objects provided with a coating layer are bonded to each other to form a lump, a predetermined drop impact force can be applied. It can be separated efficiently.
Therefore, the treatment object provided with the coating layer collected in this way can be easily conveyed to the drying apparatus which is the next process.

In addition, as shown in FIG. 8, a predetermined collection device (rotating and dropping device) 80 for performing the step (e ′) and the dip coating device 10 have a predetermined interval, for example, a central angle formed by each is 120. It is preferably arranged on the circumference of the imaginary circle (φ) so as to be ° (± 20 °).
The reason for this is that the object to be processed is moved in a predetermined place efficiently and sequentially in a short tact time while synchronizing the dip coating process and the subsequent process. Because it can.

According to the dip coating apparatus and the dip coating method of the present invention, since a predetermined immersion tank, a housing means, and a rotating means are provided, a large amount of objects to be processed such as bolts and nuts can be dip coated in a lump. it can.
At that time, the excess coating liquid is efficiently removed by the centrifugal force generated by the rotating means and the air flow generated inside the accommodating means, and a coating layer having a uniform thickness is formed on the surface of each object to be processed. It can be formed stably and quickly.
That is, for example, the total tact time can be performed in 3 minutes from the time when 100 kg of the object to be processed is input to the time when the coating layer is formed on the surface of the object to be processed. The production weight of the processed product can be 2000 kg.

  Further, according to the composite dip coating apparatus of the present invention, not only the predetermined dip coating apparatus but also a predetermined throwing apparatus and a predetermined rotary dropping apparatus are provided, and these are substantially arranged on the circumference of the virtual circle. Since it is divided into three parts, the workpiece is moved sequentially in a predetermined place efficiently, and the dip coating process and its pre-process and post-process are synchronized with each other in a short tact time, A processed product can be produced efficiently.

  Therefore, the dip coating apparatus, composite dip coating apparatus, and dip coating method of the present invention are expected to significantly contribute to the efficiency of surface treatment of various machine parts such as bolts and nuts.

10: Dip coating apparatus, 11: Object to be processed, 11 ': Processed object, 12: Storage means, 12a: Bottom surface, 12b: Inclined slope, 12c: Peripheral surface, 13: Weight measuring means (balance), 14: convex portion, 14a: internal space, 16: reinforcing support member (reinforcing plate), 16a: square pillar-shaped sleeves, 18: rail-shaped member (first rail-shaped member), 18a: end of rail-shaped member Part, 18b: right rail part, 18c: left rail part, 18d: rail connecting part, 18e: space part, 18f: engagement member, 20 (20a, 20b): bearing member, 21: frame member, 21a: flange, 21b: Rail contact member (groove), 21c: Bearing member, 22: Rotation drive means, 23: Vertical rotation axis (second vertical rotation axis), 24: Rail-shaped member (second rail-shaped member) ) 2 a: guide member, 25: rotating means, 26: disc brake, 27: rotational drive unit, 28: support member of dip coating apparatus, 30: immersion tank, 31: coating treatment liquid, 32: immersion tank moving means, 33: Positioning pin, 33 ': Positioning member, 33a': Rotary bearing for positioning, 34: Positioning pin receiver, 34 ': Positioning member, 34a', 34b ': V groove, 40: Moving means, 42: Rotating shaft (first , 43: support member of the storage means, 44: rotation feed device, 46: pressing member driving device, 46a: storage member press, 46b: rail press, 48: support member of the moving means, 50 : Feeding device, 52: Means for transporting the workpiece, 53: Drive member (chain crane), 54: Support member, 80: Recovery device, 100: Composite dip coating device , 120: first drying device, 122: moving apparatus of the first treatment product, 140: second drying device, 142: moving unit of the second processing material, 144: inclination forming member, 160: tapping apparatus

Claims (11)

A dip coating apparatus in which a predetermined amount of an object to be processed is immersed in a coating treatment liquid accommodated in a dipping tank in a state of being accommodated in an accommodation means, and is a treatment object provided with a coating layer,
Drive means for immersing the storage means in a state of storing the object to be processed in the coating treatment liquid;
Rotating means for rotating or reciprocatingly rotating the containing means about a rotation axis in the vertical direction to remove excess coating treatment liquid;
With
A convex portion having a predetermined space inside is provided on the bottom surface of the storage means, and a plurality of openings for communicating the coating treatment liquid are provided on the peripheral surface and the convex portion of the storage means. A dip coating apparatus that removes excess coating treatment liquid by generating centrifugal force and air flow by rotating or reciprocating means.   The dip coating apparatus according to claim 1, wherein a shape of the convex portion is a cylindrical shape having a pointed portion or a conical shape.   3. The dip coating apparatus according to claim 1, wherein a bottom surface of the housing means has an inclined portion that is inclined downward from a peripheral portion toward a central portion. 4.   The dip coating according to any one of claims 1 to 3, wherein a peripheral surface and a convex portion of the housing means are made of a metal plate having punching holes as the plurality of openings. apparatus.   The dip according to any one of claims 1 to 4, wherein the rotating means is switchable in a rotating direction, and includes a disc brake for suddenly stopping the accommodating means during rotation. Coating equipment. A predetermined amount of workpiece input device;
A dip coating apparatus in which a predetermined amount of an object to be processed is immersed in a coating treatment liquid accommodated in a dipping tank in a state of being accommodated in an accommodation means, and a treatment object provided with a coating layer is provided.
Processing material collection device;
Are provided at predetermined intervals on the circumference of the virtual circle,
In a state where the object to be processed is accommodated in the accommodating means, the object to be processed is charged while being rotated along the circumference of the virtual circle around the first vertical rotation axis. A composite dip coating apparatus for performing dip coating and recovery of a processed product,
The workpiece input device comprises a conveying device having a ramp for charging a predetermined amount of the material to be processed with respect to the processing object storage means,
The dip coating apparatus rotates the accommodating means in the state where the object to be treated is immersed in the coating treatment liquid, and the accommodating means is rotated about a second vertical rotation axis. Or rotating means for removing the excess coating treatment liquid by reciprocating rotation, and providing a convex portion having a predetermined space on the bottom surface of the accommodating means, and a peripheral surface of the accommodating means and The convex portion is provided with a plurality of openings for communicating the coating treatment liquid,
Furthermore, the recovery device for the processed product has a rotating and dropping device for tilting the storage means that stores the processed product to drop and extract the processed product,
Composite dip coating equipment characterized by   The dip coating apparatus has a moving means, and after the horizontal movement from the rotation stop position on the circumference of the virtual circle to a predetermined position outside the virtual circle by the moving means, the containing means is moved. The composite dip coating apparatus according to claim 6, wherein the composite dip coating apparatus rotates about a second vertical rotation axis.   A drying device is provided at an end of the processing product recovery device, and an impact applying device is provided in the middle of the drying device to drop the processing product provided with the coating layer in the direction of gravity. The composite dip coating apparatus according to claim 7. A drive means for immersing the storage means in a state in which the object to be processed is immersed in the coating treatment liquid, and rotating or reciprocating the storage means about a vertical rotation axis, thereby providing an extra coating treatment liquid. And a convex portion having a predetermined space on the bottom surface of the storage means, and the coating treatment liquid communicates with the peripheral surface and the convex portion of the storage means. Using a dip coating apparatus provided with a plurality of openings for the purpose, a predetermined amount of the object to be processed is immersed in the coating treatment liquid accommodated in the immersion tank while being accommodated in the accommodating means, and the coating layer A dip coating method as a processed product comprising:
A dip coating method comprising the following steps (a) to (d):
(A) The step of accommodating the object to be treated in the accommodating means (b) The step of immersing the accommodating means in the state of accommodating the object to be treated in the coating treatment liquid accommodated in the immersion tank (c ) Step of pulling up the storage means from the coating treatment liquid (d) The storage means is rotated by the rotation means in a non-immersed state, and centrifugal force and the storage means from the convex portion in the storage means Removing excess coating treatment liquid adhering to the object to be processed using an air flow generated toward the outside of   The dip coating method according to claim 9, wherein in the step (b), the container is rotated by the rotating unit while being immersed in the coating treatment liquid.   11. The dip coating method according to claim 9, wherein, in the step (d), the rotating means is switched after a sudden stop of the containing means in a rotating state.

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