JP4560345B2 - Painting equipment - Google Patents

Description

The present invention supplies a paint sprayer through the paint feed channel, to a coating apparatus for coating the object to be coated by spraying the coating object the supply paint by the sprayer.

  When coating the object by spraying paint with a sprayer, the paint to be supplied to the sprayer (that is, the paint sprayed on the object) meets the coating conditions by mixing with a viscosity adjusting liquid such as a solvent for dilution. Although it is necessary to adjust the viscosity to a compatible viscosity, conventionally, the paint stored in the paint tank of the paint supplier is applied by manual or automatic mixing of the paint viscosity adjusting liquid while the painting operation is suspended. By adjusting the viscosity in conformity with the conditions in advance and supplying the paint from the paint tank to the sprayer through the paint supply path, the paint having the above-mentioned suitable viscosity is sprayed on the object to be coated (Patent Document 1). reference).

JP-A-9-225365

  However, the conventional coating method and coating apparatus have the following problems (a) to (c).

  (B) Since the coated paint tends to spread to the surroundings due to gravity on the upward surface of the object to be coated, the coated paint tends to flow down due to gravity on the lateral surface (vertical surface) of the coated object. There is a difference in the viscosity of the spray paint on each side of the surface to be coated (or the surface close to the top) and the side surface (or the surface close to the side). In conventional coating methods and coating equipment that require viscosity adjustment processing for paint stored in the paint tank while the painting operation is suspended, the surface to be coated with different orientations on a single object to be coated, or the surface to be painted For example, when continuously coating multiple objects with different orientations, it is not possible to respond immediately to changes in the compatible viscosity due to changes in the orientation of the surface to be coated. Painted However, in the painting of the sideways surface, it is easy to cause the coating failure that the coating paint drips, and in order to prevent the coating failure due to this sagging, the thickness of the coating film is restricted to be smaller than that of the upward surface As a result, there has been a problem that the coating quality (for example, the smoothness of the coating film and the feeling of flesh) of the lateral surface is lower than that of the upward surface.

  (B) The coating thickness on the side surface is limited to be smaller than that of the upward surface, so that the above-mentioned problem that the coating quality of the side surface is lower than that of the upward surface is interposed with an appropriate drying time. However, it is possible to secure a large coating thickness in the painting on the side surface while preventing dripping by repeating the coating by spraying the paint from the sprayer several times on the side surface (so-called overcoating). Because of the repeated coating while interposing an appropriate drying time, the time required for coating becomes longer and the productivity is lowered. Also, the required line length is required for a coating line that coats in steps while conveying the object to be coated. However, there is a problem that the equipment cost and the operating cost increase.

  (C) Although the viscosity of the paint changes depending on the temperature and with time, it is necessary to adjust the viscosity of the paint stored in the paint tank while the painting operation is suspended in order to adjust the viscosity of the spray paint on the object to be coated. In the coating method and coating apparatus of the above, it is not possible to flexibly cope with the change in the viscosity of the spray paint due to the change in the viscosity of the paint due to a temperature change or a change over time in the paint tank storage process. There is also a problem in that the viscosity of the sprayed paint deviates from the compatible viscosity corresponding to the coating conditions, which causes a reduction in coating quality.

  In view of the above circumstances, the main problem of the present invention is to effectively solve the above-described problems by adopting a rational adjustment method in adjusting the viscosity of the paint.

In the coating method of supplying the coating material by supplying the coating material to the sprayer through the coating material supply path and spraying the supplied coating material on the coating material by the sprayer,
You may make it adjust the viscosity of the sprayed coating material with respect to a to-be-coated object by inject | pouring a coating-material viscosity adjustment liquid into the said coating-material supply path in the middle of a paint passage along with the spraying of the coating material to the to-be-coated object by the said sprayer .

In this coating method, the paint viscosity adjusting liquid is injected into the paint supply path through which the paint is passing in parallel with the spraying of the paint onto the object to be coated by the sprayer, whereby the paint passing through the paint supply path (that is, to the sprayer). The viscosity of the spray paint with respect to the object to be coated is adjusted by sequentially performing the viscosity adjustment process by mixing the paint viscosity adjusting liquid on the paint in the feeding process. Therefore, according to this coating method, when it is necessary to change the viscosity of the spray paint even during the painting operation, the injection amount and the injection type of the paint viscosity adjusting liquid to be injected into the paint supply passage while the paint is passing are changed. By doing so, the viscosity of the spray paint can be changed immediately, and thereby various problems in the above-described conventional coating method can be effectively solved.

  In other words, the orientation of the surface to be painted is different when, for example, the surface to be coated with different orientations on a single object is continuously coated or when a plurality of objects with different orientations of the surface to be painted are continuously painted. When the viscosity changes due to a change, the viscosity of the spray paint is immediately changed from the previous viscosity suitable for painting the surface to be painted to a new viscosity suitable for painting the new surface. As a result, the above-mentioned problem (a) can be effectively solved, and the improvement of the coating quality of the entire article to be coated can be effectively achieved.

  In addition, in order to ensure a sufficient coating thickness while preventing dripping when painting the sideways surface of the object to be coated by being able to respond quickly to changes in the compatible viscosity due to changes in the direction of the surface to be coated. It is also possible to eliminate the need to repeat the coating by spraying the coating on the lateral surface several times while interposing an appropriate drying period, or to reduce the number of repetitions. This can be effectively eliminated and the productivity of the coated product can be improved, and the required line length of the coating line can be shortened, and the equipment cost and the operating cost can be effectively reduced.

  In addition, even when the viscosity of the spray paint on the object changes due to changes in the temperature of the paint tank during storage or changes in the viscosity of the paint due to changes over time, By changing the injection type, it is possible to cope with fine and flexible, regardless of the temperature of the paint tank storage process and the change in paint viscosity due to changes over time. The matching viscosity can be stably maintained, and the above-mentioned problem (c) can be effectively solved, and the coating quality can be improved more effectively.

In a coating apparatus for supplying a coating material by supplying a coating material to a sprayer through a coating material supply path and spraying the supplied coating material on the coating material by the sprayer,
Injecting means for injecting a paint viscosity adjusting liquid into the paint supply path while passing the paint in parallel with the paint spraying on the object to be coated by the sprayer,
You may make this injection | pouring means the structure which can change the injection quantity or injection | pouring seed | species of the coating-material viscosity adjustment liquid inject | poured into the said coating material supply path .

In this coating apparatus, the paint viscosity adjusting liquid is injected into the paint supply path through which the paint is passing by the injection means in parallel with the spraying of the paint onto the object to be coated by the sprayer, so that the paint passing through the paint supply path (that is, The viscosity of the spray paint on the object is adjusted by sequentially performing a viscosity adjustment process by mixing the paint viscosity adjusting liquid on the paint in the process of feeding to the sprayer. Then, when necessary, the injection means or the injection type of the paint viscosity adjusting liquid to be injected into the paint supply path is changed by operating the injection means.

Therefore, according to this coating apparatus, when it is necessary to change the viscosity of the spray paint even during the painting operation, the injection amount or the injection seed of the paint viscosity adjusting liquid to be injected into the paint supply passage while the paint is passing is injected. By changing the operation with the means, the viscosity of the spray paint can be changed immediately, and thereby the above-mentioned effect obtained by the above-described coating method can be obtained.

In the implementation of these coating methods or coating equipment, the viscosity of the spray paint is changed by changing the amount and type of injection of the paint viscosity adjusting liquid when the conformity viscosity changes due to the change in the orientation of the surface to be applied. , It may be only one when the viscosity of the spray paint deviates from the compatible viscosity due to a change in the viscosity of the paint due to a change in temperature or a change over time, and not limited to this, and it is not limited to this, but a paint type (for example, paint color) When adjusting the viscosity of the spray paint after changing the paint type to a compatible viscosity that suits the coating conditions, or when changing the type of coating, it is suitable for the coating after changing the type of spray coating It may be when adjusting to a suitable viscosity.

In the implementation of these coating methods or apparatuses, the viscosity of the paint stored in the paint tank of the paint supplier is adjusted to some extent as a basic adjustment, and then the viscosity of the paint sent from the paint tank to the sprayer (that is, , The viscosity of spray paint on the object to be coated) is adjusted to the appropriate viscosity at the time of each application by injecting the paint viscosity adjusting liquid to the paint supply path while the paint is passing, or the paint viscosity is adjusted to the paint supply path while the paint is passing Any method of adjusting the viscosity of the spray paint with respect to the object to be applied to the compatible viscosity at the time of each application only by injecting the liquid may be adopted.

In the implementation of these coating methods or apparatuses, when changing the injection type of the paint viscosity adjusting liquid (that is, changing the type of the paint viscosity adjusting liquid injected into the paint supply path), the change of the injection type is simply In addition, it is not limited to changing the injection type for the purpose of changing the viscosity of spray paint, but when changing the paint type, the viscosity adjustment of the paint after changing the paint type can be done by changing the type of paint viscosity adjusting liquid injected into the paint supply path. For example, the injection type may be changed to a suitable one.

In the implementation of these coating methods or coating apparatuses, it is desirable that the paint viscosity adjusting liquid is injected into the paint supply path as close as possible to the sprayer in the paint flow direction.

As a preferred embodiment of the coating apparatus,
An automatic painting means for automatically painting an object to be coated using the sprayer is provided,
By operating the injection means in cooperation with this automatic painting means, depending on the paint spraying site at each time point of the object to be coated, or according to the type of each object to be coated sequentially, or sequentially Viscosity control means for automatically changing the injection amount or injection type of the paint viscosity adjusting liquid to be injected into the paint supply path according to the spray paint type for each object to be coated may be provided .

According to this configuration, regardless of whether the paint spraying portion of the article to be coated, the type of the article to be coated, or the type of spray paint changes as the automatic painting by the automatic painting means progresses, it is linked with the automatic painting. The viscosity of the spray paint on the coating object is changed by the automatic change of the injection amount or the injection type as described above, which is executed by the viscosity control means, and the coating spray portion of the coating object or the type of the coating material or the spray coating at each coating time It is possible to automatically and accurately adjust the viscosity suitable for the seeds, so that the effects of the above-mentioned coating method or coating device can be reliably obtained in each process of automatic coating by automatic coating means. The improvement of the coating quality in coating can be achieved very effectively.

As a preferred embodiment of the above configuration,
In the automatic painting means, a movable arm for moving the sprayer that supports the sprayer may be provided with an adjustment liquid injection portion for the paint supply path of the injection means .

  In other words, the part of the paint supply path between the adjustment liquid injection part of the injection means (that is, the injection part of the paint viscosity adjustment liquid to the paint supply path) and the sprayer changes the injection amount or injection type of the paint viscosity adjustment liquid. The cause of the time delay when changing the viscosity of the spray paint (i.e., the time delay until the spray paint viscosity changes to the required viscosity after changing the injection amount or injection type of the paint viscosity adjusting liquid) If the adjustment liquid injection part is arranged upstream of the movable arm in the paint flow direction, the slack is formed to allow the movement of the movable arm by giving the paint supply channel forming tube material slack. The path portion is positioned between the adjustment liquid injection section and the sprayer, which increases the length of the path between the adjustment liquid injection section and the sprayer in the paint supply path, and the time delay is increased. Become.

On the other hand, according to the above configuration in which the adjustment liquid injection part for the paint supply path of the injection means is provided in the movable arm, the adjustment liquid injection part is positioned downstream of the slack path part in the paint supply path. Thus, the path length of the portion between the adjustment liquid injection part and the sprayer in the paint supply path can be effectively shortened, and thereby the time delay can be effectively reduced. Improvement of coating quality can be achieved more effectively.

As a preferred embodiment of the coating apparatus,
A temperature detecting means for detecting a temperature of a coating work area where the object to be coated is applied by spraying the paint from the sprayer, or a temperature of the paint supplied to the sprayer through the paint supply path;
By operating the injection means based on the temperature detected by the temperature detection means, the injection amount or injection type of the paint viscosity adjusting liquid to be injected into the paint supply path is automatically set according to the temperature detected by the temperature detection means. Viscosity control means for temperature compensation to be changed may be provided .

According to this configuration , the temperature compensation temperature controlling means as described above executes that the viscosity of the spray paint with respect to the object to be coated deviates from the compatible viscosity corresponding to the coating condition due to the viscosity change due to the temperature change. This can be prevented by automatically changing the injection amount or injection type based on the detection, and the viscosity of the spray paint can be stably maintained at a suitable viscosity corresponding to the coating conditions regardless of the viscosity change due to temperature change. As a result, the coating quality can be improved more effectively.

As a preferred embodiment of the coating apparatus,
Viscosity detection means for detecting the viscosity of the paint sent from the paint tank to the paint supply path is provided,
By operating the injection means based on the viscosity detected by the viscosity detection means, the injection amount or injection type of the paint viscosity adjusting liquid to be injected into the paint supply path is automatically set according to the viscosity detected by the viscosity detection means. Viscosity control means for compensating for change over time may be provided .

According to this configuration, the viscosity control means for compensating for the change over time indicates that the viscosity change due to the change over time of the paint stored in the paint tank is in a state in which the viscosity of the spray paint with respect to the object is out of the compatible viscosity corresponding to the coating conditions. It can be prevented by automatic change of the injection amount or injection type based on the viscosity detection as described above, and the viscosity of the spray paint conforms to the paint condition regardless of the viscosity change due to aging of the paint stored in the paint tank. Thus, the coating quality can be improved more effectively.

As a preferred embodiment of the coating apparatus,
A stirring means for stirring the paint passing through the paint supply path may be provided on the downstream side in the paint flow direction with respect to the adjustment liquid injection section for the paint supply path of the injection means .

According to this configuration, the paint viscosity adjusting liquid injected into the paint supply path passing through the paint is further stirred by the stirring means with respect to the paint being passed through the paint supply path (that is, the paint being fed to the sprayer). It is possible to mix evenly, and by this uniform mixing, the viscosity of the spray paint on the object to be coated can be adjusted more uniformly in the paint viscosity adjustment by injecting the paint viscosity adjusting liquid, thereby improving the paint quality. Can be achieved more effectively.

  Further, the mixing by the stirring means makes it unnecessary to secure a large path length of the portion between the adjusting liquid injection portion of the injection means and the sprayer in the coating material supply path for promoting the mixing of the paint viscosity adjusting liquid. It is possible to shorten the path length of the portion between the adjustment liquid injection part and the sprayer, thereby changing the injection amount or injection type of the paint viscosity adjustment liquid and changing the viscosity of the spray paint Since the time delay at the time can be reduced, the improvement of the coating quality can be achieved more effectively.

In the implementation of this configuration, the agitating means includes a drive type agitating means for agitating the paint by driving rotation of the agitating blade, or a non-agitator for agitating the paint by rotating the passing paint with a fixed guide blade. Any of the drive-type stirring means may be adopted, but the injection of the paint viscosity adjusting liquid is an injection into the paint supply passage while passing through the paint, and the injection of the paint viscosity adjusting liquid is considerably efficient for the paint. Therefore, it is generally possible to obtain a sufficient effect even if a non-drive type stirring means is adopted, and the non-drive type stirring means is more effective than the automatic coating means described above. Equipped with a movable arm for moving the sprayer.
[1] A first characteristic configuration of the present invention relates to a coating apparatus,
A coating apparatus that supplies a coating material to a sprayer through a coating material supply path and sprays the supplied coating material onto the coating material by the sprayer,
Injecting means for injecting a paint viscosity adjusting liquid into the paint supply path while passing the paint in parallel with the paint spraying on the object to be coated by the sprayer,
This injection means is configured to be capable of changing the injection amount or injection type of the paint viscosity adjusting liquid to be injected into the paint supply path,
Viscosity detection means for detecting the viscosity of the paint sent from the paint tank to the paint supply path is provided,
By operating the injection means based on the viscosity detected by the viscosity detection means, the injection amount or injection type of the paint viscosity adjusting liquid to be injected into the paint supply path is automatically set according to the viscosity detected by the viscosity detection means. There is a viscosity control means for compensating the change with time.
According to the first characteristic configuration, since the viscosity control means for compensating the change with time is provided, as described above (paragraph 0028 to paragraph 0029), the viscosity of the spray paint applied to the object by the change in viscosity due to the change with time of the paint tank storage paint It is possible to prevent the viscosity from deviating from the compatible viscosity suitable for the coating conditions by automatically changing the injection amount or injection type based on the viscosity detection as described above, which is executed by the viscosity control means for aging compensation. The viscosity of spray paint can be stably maintained at a suitable viscosity corresponding to the painting conditions regardless of the viscosity change due to the aging of the paint tank storage paint, thereby achieving more effective improvement of paint quality. be able to.
[ 2] The second characteristic configuration of the present invention specifies an embodiment suitable for the implementation of the first characteristic configuration.
By applying the injection means in conjunction with an automatic painting means for automatically painting an object to be coated using the sprayer, it is possible to apply the coating according to the paint spraying site at each time point of the article to be coated or sequentially. Viscosity control that automatically changes the injection amount or injection type of the paint viscosity adjusting liquid to be injected into the paint supply path according to the type of each object or according to the spray paint type for each object to be coated sequentially. Means, or
The injection means is operated based on the temperature of a painting work area in which the object to be coated is applied by spraying the paint from the sprayer or the temperature detected by the temperature detecting means for detecting the temperature of the paint supplied to the sprayer through the paint supply path. Thus, according to the temperature detected by the temperature detection means, a viscosity control means for temperature compensation for automatically changing the injection amount or injection type of the paint viscosity adjusting liquid to be injected into the paint supply path ,
It is provided with the viscosity control means for compensating the change with time.
According to the second characteristic configuration, when the viscosity control means is provided together with the viscosity control means for compensating for change with time, as described above (paragraph 0021 to paragraph 0022), as the automatic painting means progresses, the coating is performed. Regardless of whether the paint spraying part of the object, the type of object to be coated, or the type of spray paint changes, the automatic injection amount or injection type as described above performed by the viscosity control means in conjunction with the automatic coating By the change, the viscosity of the spray paint on the coating can be automatically and accurately adjusted to the suitable viscosity suitable for the paint spraying part of the coating at the time of each coating or the type of spray coating or the type of spray coating, Thereby, the improvement of the coating quality in automatic coating can be achieved very effectively.
Further, when the viscosity control means for temperature compensation is provided together with the viscosity control means for compensating for change with time, as described above (paragraphs 0026 to 0027), the viscosity of the spray paint with respect to the object to be coated is changed by the viscosity change due to temperature change. It is possible to prevent the viscosity from deviating from the suitable viscosity corresponding to the coating conditions by automatically changing the injection amount or injection type based on the temperature detection as described above, which is performed by the temperature compensation viscosity control means. The viscosity of the spray paint can be stably maintained at the compatible viscosity corresponding to the coating conditions regardless of the viscosity change due to the above, and thereby the coating quality can be improved more effectively.
[3] A third characteristic configuration of the present invention relates to a coating apparatus,
A coating apparatus that supplies a coating material to a sprayer through a coating material supply path and sprays the supplied coating material onto the coating material by the sprayer,
Injecting means for injecting a paint viscosity adjusting liquid into the paint supply path while passing the paint in parallel with the paint spraying on the object to be coated by the sprayer,
This injection means is configured to be capable of changing the injection type of the paint viscosity adjusting liquid injected into the paint supply path,
An automatic painting means for automatically painting an object to be coated using the sprayer is provided,
By operating the injection means in cooperation with this automatic painting means, depending on the paint spraying site at each time point of the object to be coated, or according to the type of each object to be coated sequentially, or sequentially Viscosity control means for automatically changing the injection type of the paint viscosity adjusting liquid to be injected into the paint supply path according to the type of spray paint for each object to be coated is provided.
According to the third characteristic configuration, since the viscosity control means is provided, as described above (paragraphs 0021 to 0022), the paint spraying portion of the article to be coated and the article to be coated as the automatic painting by the automatic painting means proceeds. Regardless of whether the type of spray paint or the type of spray paint changes, the viscosity of the spray paint relative to the object to be coated can be changed by the above-described automatic change of the injection type performed by the viscosity control means in cooperation with the automatic paint. It is possible to automatically and accurately adjust the paint spraying part of the coated object at the time of painting or the compatible viscosity suitable for the type of coated object or the type of sprayed paint, which is extremely effective in improving the coating quality in automatic painting. Can be achieved.
[4] The fourth characteristic configuration of the present invention specifies an embodiment suitable for the implementation of the third characteristic configuration.
The injection means is configured to be able to change the injection amount and injection type of the paint viscosity adjusting liquid injected into the paint supply path,
By operating the injection means in cooperation with the automatic coating means, the viscosity control means, depending on the paint spraying site at each time point of the article to be coated, or for each type of article to be coated sequentially In accordance with or depending on the spray paint type for each object to be coated in sequence, the amount and type of paint viscosity adjusting liquid to be injected into the paint supply path are automatically changed. .
According to the fourth characteristic configuration, since the viscosity control means is provided, as described above (paragraph 0021 to paragraph 0022), the paint spraying portion of the article to be coated, or the article to be coated as the automatic painting by the automatic painting means progresses. Regardless of whether the type of spray paint or the type of spray paint changes, the viscosity control means performs the automatic change of the injection amount and the injection type as described above in cooperation with the automatic paint, so that the spray paint for the object to be coated is changed. Viscosity can be automatically and accurately adjusted to the appropriate viscosity suitable for the paint spraying area of the coating or the type of coating or the type of spray coating at each coating point, thereby improving the coating quality in automatic coating Can be achieved very effectively.
[5] A fifth feature of the present invention relates to a coating apparatus,
A coating apparatus that supplies a coating material to a sprayer through a coating material supply path and sprays the supplied coating material onto the coating material by the sprayer,
Injecting means for injecting a paint viscosity adjusting liquid into the paint supply path while passing the paint in parallel with the paint spraying on the object to be coated by the sprayer,
This injection means is configured to be capable of changing the injection type of the paint viscosity adjusting liquid injected into the paint supply path,
A temperature detecting means for detecting a temperature of a coating work area where the object to be coated is applied by spraying the paint from the sprayer, or a temperature of the paint supplied to the sprayer through the paint supply path;
A temperature at which the injection type of the paint viscosity adjusting liquid to be injected into the paint supply path is automatically changed according to the temperature detected by the temperature detecting means by operating the injection means based on the temperature detected by the temperature detecting means. A compensation viscosity control means is provided.
According to this fifth characteristic configuration, since the temperature compensation viscosity control means is provided, as described above (paragraphs 0026 to 0027), the viscosity of the spray paint on the object to be coated due to the viscosity change due to the temperature change becomes the coating condition. It is possible to prevent the condition from being out of the suitable viscosity by the automatic compensation of the injection type based on the temperature detection as described above, which is executed by the temperature compensation viscosity control means, regardless of the viscosity change due to the temperature change. It is possible to stably maintain the viscosity of the spray paint at a compatible viscosity corresponding to the coating conditions, and thereby it is possible to more effectively improve the coating quality.
[6] The sixth feature configuration of the present invention specifies an embodiment suitable for the implementation of the fifth feature configuration.
The injection means is configured to be able to change the injection amount and injection type of the paint viscosity adjusting liquid injected into the paint supply path,
The temperature compensation viscosity control means is configured to automatically change the injection amount and injection type of the paint viscosity adjusting liquid to be injected into the paint supply path in accordance with the temperature detected by the temperature detection means. is there.
According to the sixth characteristic configuration, since the temperature compensation viscosity control means is provided, as described above (paragraphs 0026 to 0027), the viscosity of the spray paint on the object to be coated due to the viscosity change due to the temperature change becomes the coating condition. It is possible to prevent the condition from deviating from the suitable viscosity, which can be prevented by the automatic change of the injection amount and the injection type based on the temperature detection as described above, which is executed by the temperature compensation viscosity control means. Regardless of this, it is possible to stably maintain the viscosity of the spray paint at a compatible viscosity corresponding to the coating conditions, and thereby it is possible to more effectively improve the coating quality.
[7] The seventh characteristic configuration of the present invention specifies an embodiment suitable for any one of the first to sixth characteristic configurations.
An automatic painting means for automatically painting an object to be coated using the sprayer is provided,
In this automatic coating means, a movable arm for moving the sprayer that supports the sprayer, an adjustment liquid injection part for the paint supply path of the injection means, and an adjustment liquid for injection adjustment liquid selection that is a component of the injection means The switching valve device is provided.
According to the seventh characteristic configuration, since the adjustment liquid injection section is provided in the operating arm for moving the sprayer, as described above (paragraphs 0023 to 0025), the adjustment liquid is disposed downstream of the slack path portion in the paint supply path. In the form of positioning the injection part, the path length of the part between the adjustment liquid injection part and the sprayer in the paint supply path can be effectively shortened, thereby changing the viscosity of the spray paint The time delay can be effectively reduced, and thereby the coating quality can be improved more effectively.
Further, according to the seventh characteristic configuration, the paint viscosity adjusting liquid to be injected into the paint supply path through the adjusting liquid injection section is selected by the adjusting liquid switching valve device provided in the operating arm for moving the sprayer.

  FIG. 1 shows a painting facility, 1 is a painting booth, 2 is a painting robot installed in the painting booth 1 (that is, a painting work area), and a tip of a movable arm 2a in the painting robot 2 is coated with a coating object. A coating gun 4 as a sprayer for spraying the paint T is attached to the object 3 (automobile body in this embodiment). Reference numeral 5 denotes a transport device that transports the workpiece 3 continuously or at a constant interval, and in this coating facility, the coating robot 2 is operated in a set operation pattern for each of the workpieces 3 to be transported. The coating object 4 is sequentially coated by spraying paint from the coating gun 4 while changing the position of the coating gun 4 around the object 3.

  Reference numeral 6 denotes a plurality of paint tanks that store paints T of different colors at locations away from the paint booth 1. . Further, as shown in FIG. 2, any paint T of the paint T fed from the paint tank 6 by the paint pump 8 through the paint feed path 7 to the movable arm 2a of the painting robot 2 is applied to the movable arm 2a. A paint switching valve device 10 is provided for selecting whether to supply the paint gun 4 through the paint supply path 9 of the equipment.

  The paint switching valve device 10 is supplied with a supply path 11 for the spraying and cleaning compressed air A and a cleaning liquid S (for example, a cleaning thinner) for cleaning the paint supply path 9 when the paint T is switched. An air valve 11a and a cleaning valve 12a are connected to connect the passage 12 and intermittently supply the compressed air A and the cleaning liquid S.

  Further, in this embodiment, an example in which the paint pump 8 is interposed in each of the paint feed paths 7 from the respective paint tanks 6 is shown, but instead, a common paint pump for each paint tank 6 is connected to the paint supply path 9. You may employ | adopt the structure interposed in.

  Reference numeral 13 denotes a control panel. The control panel 13 is linked to the transport device 5 in accordance with a set coating schedule in which the type (vehicle type in this embodiment) and the planned coating color for each object 3 to be transported are written. The painting robot 2 is operated to operate the painting robot 2 with a set operation pattern according to the type of each object 3 to be coated, and the paint switching valve device 10, the paint pump 8, the air valve 11a, and the painting gun 4 are operated. Then, the paint T corresponding to the expected paint color of each object 3 is sprayed from the paint gun 4 in a spray start / stop pattern corresponding to the type of each object 3 and the air valve 11a and the cleaning are performed when the paint T is switched. A paint controller 14 for operating the valve 12a to perform washing of the paint supply path 9 is provided.

  Reference numeral 15 denotes a plurality of adjustment liquid tanks for storing different types of paint viscosity adjusting liquids L (for example, different types of dilution thinners) at locations away from the coating booth 1, and the movable arm 2a of the coating robot 2 includes The adjustment liquid feed paths 16 from the respective adjustment liquid tanks 15 are extended together with the paint supply paths 7 from the respective paint tanks 6.

  In addition, the movable arm 2a of the painting robot 2 is provided with an adjustment liquid injection path 17 for injecting the paint viscosity adjusting liquid L into the paint supply path 9 while the paint is passing along with the paint spray from the paint gun 4, and the adjustment liquid. Of the paint viscosity adjusting liquids L fed from the respective adjusting liquid tanks 15 by the adjusting liquid pump 18 through the feeding path 16, which paint viscosity adjusting liquid L is to be injected into the paint supplying path 9 through the adjusting liquid injection path 17 is selected. The adjusting liquid switching valve device 19 is provided, and the adjusting liquid injection path 17 has an injection amount adjusting apparatus 20 for adjusting the injection quantity q of the paint viscosity adjusting liquid L injected into the paint supply path 9 and the injection amount thereof. A flow rate sensor 21 for detecting q (that is, the flow rate of the adjustment liquid in the adjustment liquid injection path 17) is provided.

  The control panel 13 is operated with the adjustment liquid switching valve device 19 and the adjustment liquid pump 18 in cooperation with the automatic painting by the painting controller 14 and injected in a feedback manner based on the detection information of the flow sensor 21. By operating the amount adjusting device 20, the injection amount q and the injection type of the paint viscosity adjusting liquid L to be injected from the adjusting liquid injection path 17 to the paint supply path 9 are sequentially changed to the paint spraying sites at each time of the article 3. Viscosity controller 22 that automatically changes according to predetermined change reference data D according to the type of each of the objects to be coated 3 and the spray paint type (paint color) for each of the objects to be coated 3 in order. It is.

  That is, in this painting facility, the coating material T is supplied to the coating gun 4 through the coating material supply path 9 and the coating material 3 is sprayed onto the coating material 3 by the coating gun 4. By injecting the paint viscosity adjusting liquid L into the paint supply passage 9 passing through the paint in parallel with the spraying of the paint onto the article 3 by the paint gun 4, the paint viscosity is applied to the paint T passing through the paint supply passage 9. The viscosity of the spray paint with respect to the article 3 is adjusted by sequentially performing the viscosity adjustment process by mixing the adjustment liquid L.

  Then, the viscosity controller 22 performs the automatic change of the injection amount q or the injection type as described above, which is executed by the viscosity controller 22 based on the setting change reference data D in cooperation with the automatic coating by the coating controller 14, so The viscosity is automatically adjusted to a suitable viscosity suitable for the paint spraying portion of the object 3 to be coated, the type of the object 3 to be coated, the type of spray paint, and the like at each application time.

  Further, the paint supply path 9 and the adjustment liquid injection path 17 are provided in the movable arm 2a of the coating robot 2, and the adjustment liquid injection section for the paint supply path 9 (that is, the connection section of the adjustment liquid injection path 17 to the paint supply path 9). Is provided on the movable arm 2a of the coating robot 2 to shorten the length of the portion of the coating material supply path 9 between the adjusting liquid injection portion and the coating gun 4 and thereby the injection amount of the coating viscosity adjusting liquid L. After changing q or the injection type, the time delay until the viscosity of the spray paint changes to the required viscosity is reduced.

  Reference numeral 23 denotes a static mixer as a stirring means interposed in the paint supply path 9 in a state of being installed in the case 4a of the paint gun 4, and this static mixer 23 is provided in the paint supply path 9 after the injection of the paint viscosity adjusting liquid L. The passing paint T is stirred in a form that is sheared by a fixed guide vane, and this stirring improves the uniform mixing property of the paint viscosity adjusting liquid L with respect to the passing paint T.

  In order to install the static mixer 23 in the paint supply path 9 on the downstream side of the place where the paint viscosity adjusting liquid L is injected, the static mixer 23 is replaced with a case in which the static mixer 23 is installed in the case 4a of the paint gun 4 as described above. The static mixer 23 may be interposed in the paint supply path 9 outside the case 4a of the coating gun 4.

  The paint supply path 9 and the adjustment liquid injection path 17 are provided with check valves 24 and 25 that allow only the flow toward the paint gun 4 for the flows of the paint T and the paint viscosity adjustment liquid L, respectively. A supply path 26 for a cleaning liquid S ′ (for example, cleaning thinner) and a supply path 27 for cleaning compressed air A ′ for cleaning the adjustment liquid injection path 17 are connected to the liquid switching valve device 19 and the cleaning liquid S ′. And a cleaning valve 26a and an air valve 27a for intermittently supplying the compressed air A '. The viscosity controller 22 changes the injection type of the paint viscosity adjusting liquid L when changing the injection type of the paint viscosity adjusting liquid L. The adjustment liquid injection passage 17 is cleaned by operating the valve 27a.

  In short, in this embodiment, the adjustment liquid tank 15, the adjustment liquid supply path 16, the adjustment liquid injection path 17, the adjustment liquid pump 18, the adjustment liquid switching valve device 19, and the injection amount adjustment apparatus 20 are the coating gun 4 as a sprayer. The injection means for injecting the paint viscosity adjusting liquid L into the paint supply path 9 passing through the paint in parallel with the spraying of the paint on the object 3 by the coating is constituted, and this injection means is the viscosity of the paint injected into the paint supply path 9 The configuration is such that the injection amount q or the injection type of the adjustment liquid L can be changed.

  The painting robot 2 and the painting controller 14 constitute an automatic painting means for automatically painting the article 3 using the painting gun 4, and the viscosity controller 22 is an injection means in cooperation with the automatic painting means. The spray paint for each coating object 3 to be coated sequentially or according to the type of each coating object 3 to be coated sequentially or according to the type of each coating object 3 to be coated sequentially Viscosity control means for automatically changing the injection amount q or the injection type of the paint viscosity adjusting liquid L to be injected into the paint supply path 9 according to the species is configured.

[Another embodiment]
Next, other embodiments of the present invention will be listed.
In the above-described embodiment, by operating the injection means 15 to 20 in cooperation with the automatic painting means 2 and 14, depending on the paint spraying portion at each point of the article 3 or sequentially In accordance with the type of each object 3 or according to the spray paint type for each object 3 to be sequentially applied, the injection quantity q or the injection type of the paint viscosity adjusting liquid L to be injected into the paint supply path 9 is automatically set. Although the configuration in which the viscosity control means to be changed is shown is shown, the viscosity control means for temperature compensation and the viscosity control means for time-dependent compensation as described below may be provided together with this viscosity control means or independently.

  The injection means 15 is based on the temperature detected in the temperature detection means for detecting the temperature of the coating work area where the article 3 is applied by spraying the paint from the sprayer 4 or the temperature of the paint T supplied to the sprayer 4 through the paint supply path 9. The temperature compensation viscosity control means for automatically changing the injection amount q or the injection type of the paint viscosity adjusting liquid L to be injected into the paint supply path 9 according to the temperature detected by the temperature detection means by operating .

  By operating the injection means 15 to 20 based on the viscosity detected by the viscosity detection means for detecting the viscosity of the paint T delivered from the paint tank 6 to the paint supply path 9, the paint supply path is determined according to the viscosity detected by the viscosity detection means. Viscosity control means for compensating for changes over time, which automatically changes the injection amount q or the injection type of the paint viscosity adjusting liquid L to be injected into 9.

  In the above-described embodiment, an example in which the painting gun 4 is moved by the painting robot 2 to automatically paint the article 3 is shown. However, the painting gun 4 is repeatedly swung and lifted up and down by an automatic painting machine. The present invention may be applied in the case of automatically coating an object to be coated.

  The sprayer that sprays the coating material T supplied from the coating material supply path 9 onto the object to be coated 3 is not limited to the coating gun 4 shown in the above-described embodiment, and various types and structures may be applied. In the practice of the present invention, the object to be coated is not limited to the automobile body.

  In the above-described embodiment, the example in which the paint T and the paint viscosity adjusting liquid L are respectively fed from the tanks 6 and 15 is shown. However, in the implementation of the present invention, the paint T and the paint viscosity adjusting liquid L are fed in each case. It is not necessarily limited to feeding from a tank, and feeding through an extended pipe in a form not equipped with a tank may be used.

In the implementation of the coating method or the coating apparatus, the injection amount q or the injection type of the paint viscosity adjusting liquid L to be injected into the paint supply path 9 passing through the paint may be changed by human operation.

Configuration diagram of painting equipment Circuit diagram around the paint gun

DESCRIPTION OF SYMBOLS 9 Paint supply path 4 Sprayer T Paint 3 Coating object L Paint viscosity adjusting liquid 15-20 Injection | pouring means q Injection amount 2,14 Automatic coating means 22 Viscosity control means 2a Movable arm 23 Stirring means
19 Adjusting liquid switching valve device

Claims (7)

A coating apparatus that supplies a coating material to a sprayer through a coating material supply path and sprays the supplied coating material onto the coating material by the sprayer,
Injecting means for injecting a paint viscosity adjusting liquid into the paint supply path while passing the paint in parallel with the paint spraying on the object to be coated by the sprayer,
This injection means is configured to be capable of changing the injection amount or injection type of the paint viscosity adjusting liquid to be injected into the paint supply path,
Viscosity detection means for detecting the viscosity of the paint sent from the paint tank to the paint supply path is provided,
By operating the injection means based on the viscosity detected by the viscosity detection means, the injection amount or injection type of the paint viscosity adjusting liquid to be injected into the paint supply path is automatically set according to the viscosity detected by the viscosity detection means. A coating apparatus provided with a viscosity control means for compensating for change over time. By applying the injection means in conjunction with an automatic painting means for automatically painting an object to be coated using the sprayer, it is possible to apply the coating according to the paint spraying site at each time point of the article to be coated or sequentially. Viscosity control that automatically changes the injection amount or injection type of the paint viscosity adjusting liquid to be injected into the paint supply path according to the type of each object or according to the spray paint type for each object to be coated sequentially. Means, or
The injection means is operated based on the temperature of a painting work area in which the object to be coated is applied by spraying the paint from the sprayer or the temperature detected by the temperature detecting means for detecting the temperature of the paint supplied to the sprayer through the paint supply path. Thus, according to the temperature detected by the temperature detection means, a viscosity control means for temperature compensation for automatically changing the injection amount or injection type of the paint viscosity adjusting liquid to be injected into the paint supply path ,
2. The coating apparatus according to claim 1, wherein the coating apparatus is provided together with the viscosity control means for compensating for the change with time. A coating apparatus that supplies a coating material to a sprayer through a coating material supply path and sprays the supplied coating material onto the coating material by the sprayer,
Injecting means for injecting a paint viscosity adjusting liquid into the paint supply path while passing the paint in parallel with the paint spraying on the object to be coated by the sprayer,
This injection means is configured to be capable of changing the injection type of the paint viscosity adjusting liquid injected into the paint supply path,
An automatic painting means for automatically painting an object to be coated using the sprayer is provided,
By operating the injection means in cooperation with this automatic painting means, depending on the paint spraying site at each time point of the object to be coated, or according to the type of each object to be coated sequentially, or sequentially A coating apparatus provided with a viscosity control means for automatically changing an injection type of a paint viscosity adjusting liquid to be injected into the paint supply path in accordance with a spray paint type for each object to be coated. The injection means is configured to be able to change the injection amount and injection type of the paint viscosity adjusting liquid injected into the paint supply path,
By operating the injection means in cooperation with the automatic coating means, the viscosity control means, depending on the paint spraying site at each time point of the article to be coated, or for each type of article to be coated sequentially The injection amount and the injection type of the paint viscosity adjusting liquid to be injected into the paint supply path are automatically changed according to the spray paint type for each object to be sequentially applied. The coating equipment described . A coating apparatus that supplies a coating material to a sprayer through a coating material supply path and sprays the supplied coating material onto the coating material by the sprayer,
Injecting means for injecting a paint viscosity adjusting liquid into the paint supply path while passing the paint in parallel with the paint spraying on the object to be coated by the sprayer,
This injection means is configured to be capable of changing the injection type of the paint viscosity adjusting liquid injected into the paint supply path,
A temperature detecting means for detecting a temperature of a coating work area where the object to be coated is applied by spraying the paint from the sprayer, or a temperature of the paint supplied to the sprayer through the paint supply path;
A temperature at which the injection type of the paint viscosity adjusting liquid to be injected into the paint supply path is automatically changed according to the temperature detected by the temperature detecting means by operating the injection means based on the temperature detected by the temperature detecting means. A coating device provided with viscosity control means for compensation. The injection means is configured to be able to change the injection amount and injection type of the paint viscosity adjusting liquid injected into the paint supply path,
The viscosity compensation means for temperature compensation is configured to automatically change the injection amount and injection type of the paint viscosity adjusting liquid to be injected into the paint supply path according to the temperature detected by the temperature detection means. 5. The coating apparatus according to 5 . An automatic painting means for automatically painting an object to be coated using the sprayer is provided,
In this automatic coating means, a movable arm for moving the sprayer that supports the sprayer, an adjustment liquid injection part for the paint supply path of the injection means, and an adjustment liquid for injection adjustment liquid selection that is a component of the injection means The coating device according to any one of claims 1 to 6, wherein a switching valve device is provided .

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