JPH0574660U - Coating equipment - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention makes it possible to easily wash the paint path by changing the paint color in a circulating pipe coating device using an automatic coating machine, and to enable small-volume production in an automatic coating machine. .. [Structure] Main pipe 3 for pumping paint pumped from paint tank 1 by pump 2 and returning it to the paint tank, and this main pipe 3
The automatic paint machine 12 connected from the take-out port 4 of the main pipe 3 through the color switching valve 5, the trigger valve 7, the dump valve 10 and the gate valve 11 and the paint path from the take-out port 4 of the main pipe 3 to the automatic paint machine 12 A high pressure air valve 8 and a high pressure thinner valve 9 for cleaning, a low pressure air valve 8a and a low pressure thinner valve 9a are provided, and an opening / closing valve 25, an air valve 26, a thinner valve 27 and a three-way switching valve 28 are provided at the outlet 4 of the main pipe 3. And a gear pump 22, a bypass passage 23 that bypasses the gear pump 22, and a bypass valve 24 disposed in the bypass passage 23 are provided between the color switching valve 5 and the trigger valve 7. To do.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a coating device with improved paint supply, cleaning, and color change in an automatic coating machine.

[0002]

[Prior Art]

 As shown in Fig. 3, the conventional automatic coating machine uses a paint supply, cleaning, and color-changing type coating device. The paint pumped from the paint tank 1 containing the prepared paint is pumped, and the paint is pumped again. The main pipe 3 returned to the paint tank 1, the automatic painter 12 from the paint outlets 4a, 4b, 4c of the main pipe 3, the pipe 13 for supplying the paint, and the automatic painter 11 for each paint color were arranged. For cleaning the gear pump 6 and the color switching valve 5, the trigger valve 7, the dump valve 10 and the gate valve 11 arranged between the color switching valve 5 and the automatic coating machine 12, and the color switching valve 5 for cleaning. It is composed of a high pressure air valve 8 and a high pressure thinner valve 9, and a low pressure air valve 8a and a low pressure thinner valve 9a for cleaning the automatic coating machine 12.

With the above configuration, although the coating depends on the opening and closing of the trigger valve 7, when the coating is interrupted, the color switching valve 5 is switched to the circulation side, and the gear pump 6 is left free.

For cleaning and color change, after painting, the color switching valve 5 is switched to the circulation side, the high pressure air valve 8 and the high pressure thinner valve 9 are alternately opened and closed, and the trigger valve 7, the dump valve 10, the gate valve 11, The low-pressure air valve 8a and the low-pressure thinner valve 9a are opened for short-time cleaning. After this cleaning, the color change valve 5 for the next color is opened to supply the next color at a high flow rate between the dump valves 10 and at a low flow rate after the dump valve 10.

[0005]

[Problems to be solved by the device]

 In the color change and paint supply of the automatic coating machine in the conventional coating device described above, the paint is always circulated, and it is possible to paint continuously and randomly.Therefore, it is suitable for mass-produced paint, but the paint path is washed. It is not easy to change to another paint color.

Therefore, for a paint color that is not constantly produced in a small amount and is produced in a lot in a small amount, the cleaning operation in the paint supply path must be frequently performed after the production is completed.

Therefore, at present, the paint is not manually supplied to the above-mentioned paint supply path, but the paint is put into a small tank so that the paint color can be easily changed and the paint is manually sprayed. In this case, since automatic painting cannot be performed, it is difficult to secure personnel for hand-blown painting that can handle small amounts of paint color, and manual painting may have a difference in quality compared to automatic painting.

[0008] Therefore, the development of a coating apparatus capable of supplying the coating material, cleaning, and changing colors by solving the above problems with an automatic coating machine even in a small lot production is an issue.

In view of the above problems, an object of the present invention is to provide a coating apparatus in which the coating material supply path can be easily cleaned and the color can be changed even in a small lot production.

[0010]

[Means for Solving the Problems]

 The gist of the present invention for achieving the above-mentioned object is the main pipe for pumping the paint pumped up from the paint tank and returning it to the paint tank, and the color switching valve, trigger valve, dump from the outlet of this main pipe. Equipped with an automatic painting machine connected via a valve and a gate valve, a high pressure air valve and a high pressure thinner valve, and a low pressure air valve and a low pressure thinner valve that wash the paint path from the outlet of the main pipe to the automatic painting machine. Further, an opening / closing valve, an air valve, a thinner valve, and a three-way switching valve are arranged at the outlet of the main pipe, a gear pump is provided between the color switching valve and the trigger valve, and a bypass passage bypassing the gear pump, A bypass valve disposed in the bypass passage is provided.

[0011]

[Action]

 With the above configuration, the main pipe is cleaned by the air valve and thinner valve arranged at the outlet of the main pipe, and the paint path from the color switching valve to the trigger valve is opened by opening the bypass valve and using the high pressure air valve and high pressure thinner valve. Wash with a flow of air and thinner. Clean the automatic coating machine with a low pressure air valve and a low pressure thinner valve. In addition, the three-way switching valve is used to discharge the main pipeline cleaning waste liquid, and the main pipeline paint is switched to be supplied to the color switching valve, and the gear pump supplies the paint to the automatic coating machine.

[0012]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1 and 1, reference numeral 1 is a paint tank in which the prepared paint is stored. Reference numeral 2 is a pump for pumping paint from the paint tank 1, and 3 is a main pipe for pumping the paint discharged from the pump 2 and returning the paint tank 1. An auxiliary pipe (third line) may be provided to return the paint to the paint tank 1. Reference numeral 4 is a paint outlet provided in the main pipe 3. An open / close valve 25, an air valve 26, a thinner valve 27, and a three-way switching valve 28 are arranged at the coating material outlet 4.

Reference numeral 5 denotes a color switching valve, a large number of which are arranged in parallel in the manifold 20 and are connected to the main pipe 3 via the three-way switching valve 28. Further, the manifold 20 is provided with a high pressure air valve 8 and a high pressure thinner valve 9.

Reference numeral 12 denotes an automatic coating machine, which is connected to the manifold 20 via a pipe 21. A trigger valve 7, a dump valve 10 and a gate valve 11 are arranged in a pipe 21 between the manifold 20 and the automatic coating machine 12, and a low pressure air valve 8a and a low pressure thinner valve 9a are connected to the gate valve 11. ..

A gear pump 22 driven by a servomotor 29 is arranged in a pipe 21 between the manifold 20 and the trigger valve 7, and a bypass passage 23 bypassing the gear pump 22 and a bypass valve 24 are provided. ing.

Since the present invention has the structure as described above, the paint pumped up from the paint tank 1 by the pump 2 passes through the inside of the main pipe 3 and the open / close valve 25 of the paint outlet 4 and the three-way switching valve are used. Through it, the color switching valve 5 is reached, and when the color switching valve 5 is switched to the circulation side, the paint is circulating.

When coating with the automatic coating machine 12, the color switching valve 5 is switched so as to send the coating material to the automatic coating machine 12 side, pressure is fed by the gear pump 22, and the trigger valve 7, the dump valve 10, and the gate valve. 11 is opened. In this case, the gear pump 22 improves the responsiveness of opening and closing the trigger valve 7.

When cleaning each paint path by changing the paint color, first close the three-way switching valve 28, open and close the open / close valve 25, and open the air valve 26 and the thinner valve 27 to clean the main pipe 3. To do. After cleaning, the waste liquid is discharged to the outside by switching the 3-way switching valve 28 to the drain side. Further, the interior of the paint tank 1 is cleaned by putting a thinner in the tank and circulating it after the production is finished.

On the other hand, for cleaning from the three-way switching valve 28 to the color switching valve 5 and from the color switching valve 5 to the automatic coating machine 12, the bypass valve 24 and the trigger valve 7 are opened, and the high pressure air valve 8 and the high pressure thinner valve 9 are opened. And the low-pressure air valve 8a and the low-pressure thinner valve 9a are opened and cleaning is performed in a short time.

[0020]

[Effect of the device]

 As described above, according to the present invention, the main pipe for pumping the paint pumped up from the paint tank and returning it to the paint tank, and the color switching valve, trigger valve, dump valve, and gate from the outlet of this main pipe. It is equipped with an automatic coating machine connected via a valve, a high-pressure air valve and a high-pressure thinner valve, and a low-pressure air valve and a low-pressure thinner valve for cleaning the paint path from the outlet of the main piping to the automatic coating machine. An on-off valve, an air valve, a thinner valve, and a three-way switching valve are arranged at the outlet of the gear pump, and a gear pump is provided between the color switching valve and the trigger valve, a bypass passage bypassing the gear pump, and a bypass passage. It is easy to clean the paint path by changing the paint color because it has a bypass valve. It can be carried out, a small amount in the automatic coating machine, to allow for batch production. Therefore, it has the advantages of improving the coating quality in small lot production and eliminating the need to secure workers.

[Brief description of drawings]

FIG. 1 is a circuit diagram of the device of the present invention.

FIG. 2 is a circuit diagram of a conventional device.

[Explanation of symbols]

 1 paint tank 2 pump 3 main piping 4 paint outlet 5 color switching valve 7 trigger valve 8 high pressure air valve 9 high pressure thinner valve 8a low pressure air valve 9a low pressure thinner valve 10 dump valve 11 gate valve 12 automatic coating machine 22 gear pump 23 bypass passage 24 bypass Valve 25 Open / close valve 26 Air valve 27 Thinner valve 28 3-way switching valve

Claims (1)

[Scope of utility model registration request] 1. A main pipe for pumping paint pumped up from a paint tank and returning it to the paint tank, and a connection port from a take-out port of the main pipe through a color switching valve, a trigger valve, a dump valve, and a gate valve. Equipped with an automatic coating machine, a high-pressure air valve and a high-pressure thinner valve for cleaning the paint path from the outlet of the main pipe to the automatic coating machine, and a low-pressure air valve and a low-pressure thinner valve. An air valve, a thinner valve, and a three-way switching valve are arranged, and a gear pump, a bypass passage bypassing the gear pump, and a bypass valve arranged in the bypass passage are provided between the color switching valve and the trigger valve. Coating equipment characterized by.