JPH0225495Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a paint supply device. More specifically, the present invention relates to a paint supply device suitable for supplying paints of different viscosities to each of a plurality of paint guns.

[Conventional technology]

2. Description of the Related Art Conventionally, in painting lines for automobile bodies and the like, paint supply devices have been used that mix a paint stock solution and diluting thinner and supply the viscosity-adjusted paint to a plurality of paint guns.

Conventional paint supply devices, such as the paint supply device for solid coating shown in FIG.
The raw paint solution and thinner for dilution are supplied to a mixing tank b equipped with an agitator a, mixed, and the viscosity-adjusted paint is transferred to a pressure tank d by a pump c, and from the pressure tank d is transferred by a pump e. The paint is sent to a common pressure-feeding pipe f, and is further supplied to each painting gun h from the pressure-feeding pipe f through a branch pipe g. In the case of a paint supply device for metallic coating, a return pipe i from the coating gun h is additionally provided as shown in FIG.

[Problem that the invention attempts to solve]

Since the conventional paint supply device includes only one common mixing tank b for each painting gun, the viscosity of the paint supplied to each painting gun h is all the same. Paint guns normally installed on a painting line have a combination of different uses and structures, such as pre-hand correction, automatic machine process, and post-hand correction, and supply paint with the appropriate viscosity for each. It is preferable to do so.

However, as described above, with conventional paint supply devices, all the paints have the same viscosity, making it difficult to apply appropriate coating.

Therefore, an object of the present invention is to provide a paint supply device that can supply paints of different viscosities to suit each painting gun.

[Means for solving problems]

The paint supply device of the present invention includes a viscosity adjusting device installed individually in a plurality of paint guns, a first common pipe for pumping the paint stock solution, a second common pipe for pumping the diluting thinner, and the above-mentioned. A first branch pipe branched from the first common pipe line and reaching each viscosity adjusting device, a second branch pipe branched from the second common pipe line and reaching each viscosity adjusting device, a first branch pipe line, and a second branch line. Its structural feature is that it consists of a flow rate regulating valve installed in each of the pipes.

[Effect]

When using the paint supply device of the present invention, the paint stock solution and diluting thinner supplied through the first common pipe line and the second common pipe line are individually sent to the viscosity adjusting device for each paint gun through each branch pipe line. Supplied. Moreover, the supply amount is adjusted by a flow rate regulating valve.

Therefore, the viscosity of the paint supplied to each painting gun can be varied depending on the purpose and function of each painting gun.

〔Example〕

Next, embodiments of the present invention will be described based on the drawings.

FIG. 1 is a circuit diagram of a paint supply device for solid coating, which is one embodiment of the present invention, and FIG. 2 is a circuit diagram of a paint supply device for metallic coating, which is another embodiment of the present invention.

In FIG. 1, A is a paint supply device for solid coating. 1a is a hand painting gun for pre-correction, 1
b is an automatic painting gun for automatic painting, 1c is a hand painting gun for post-correction, 2 is a first common pipe for pumping the paint stock solution, and 3 is a second common pipe for pumping diluting thinner. , 4 is a first branch pipe branched from the first common pipe line 2 near each painting gun, 5 is a second branch pipe branched from the second common pipe line near each painting gun, and 6 is a branch pipe branched from the second common pipe line near each painting gun. Reference numeral 7 designates a flow rate adjustment valve installed in each of the first branch pipes, 7 a flow rate adjustment valve installed in each of the second branch pipes, and 8 a viscosity adjustment device located near each painting gun. .

The paint stock solution in the pressure feed tank 9 is fed to the first common pipe line 2 under pressure by a pressure feed pump 10 . Reference numeral 11 denotes a back pressure regulator for applying back pressure to the outward path of the first common pipe line 2. The diluting thinner in the pressure feed tank 12 is fed under pressure to the second common pipe line 3 by a pressure feed pump 13 .

The paint stock solution is branched from the first common pipe line 2 into each of the first branch pipe lines 4, and the flow rate thereof passing therethrough is adjusted by a flow rate regulating valve 6. Further, diluting thinner is branched from the second common pipe line 3 into each of the second branch pipe lines 5, and the flow rate thereof passing therethrough is adjusted by a flow rate regulating valve 7.

Note that the flow rate adjustment valve is a concept that includes all valves that have the function of adjusting the passing flow rate by opening and closing a valve body.

The viscosity adjusting device 8 includes a mixer 8a and a reversal valve 8b, and its inlet port is connected to the first branch pipe line 4 and the second branch pipe line 5, respectively, and its outlet port is connected to each of the coating guns 1a, 1b and 1c. The mixer 8a is supplied with the paint stock solution in an amount adjusted by the flow rate adjustment valve 6 through the first branch line 4, and is supplied through the first branch line 5 with the amount adjusted by the flow rate adjustment valve 7. amount of dilution thinner is supplied.

By changing the amount of opening thereof, the flow rate regulating valves 6 and 7 described above play the role of arbitrarily changing the blending ratio of the paint stock solution and diluting thinner supplied to each mixer 8a. The paints having various blending ratios are stirred by the mixer 8a, then discharged by back pressure, and supplied to the paint guns 1a, 1b, 1c via the paint pressure regulator 16.

As described above, the paint supply device A of this embodiment can perform painting operations with different viscosities depending on the purpose of use and the function of the paint gun.

The paint supply device B for metallic coating shown in FIG. 2 has the same structure as the paint supply device A for solid coating shown in FIG. However, the rest of the structure is the same as that of the solid coating paint supply device A described above. Therefore, this paint supply device B for metallic coating can also perform coating operations with different viscosities depending on the purpose of use and the function of the coating gun.

In each of the above embodiments, the case where there are three painting guns is shown, but when two or four or more painting guns are provided, the number of branch pipes 4 and 5 and the viscosity adjusting device 8 can be increased or decreased. By doing so, the paint supply device of the present invention can be easily configured.

[Effect of idea]

When using the paint supply device of the present invention, it is possible to vary the viscosity of the paint supplied to each painting gun, making it possible to perform coatings that suit each purpose, improving the efficiency of painting work and the quality of the finish. improves.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram of a paint supply device for solid coating which is an embodiment of the present invention, Fig. 2 is a circuit diagram of a paint supply device for metallic coating which is another embodiment of the present invention, and Fig. 3 is a conventional circuit diagram. FIG. 4 is a circuit diagram of a conventional paint supply device for metallic coating. Main symbols in the drawing, 1a, 1b, 1c...Painting gun, 2...First common pipe line, 3...Second common pipe line,
4...first branch pipe line, 5...second branch pipe line, 6,
7...Flow rate adjustment valve, 8...Viscosity adjustment device.

Claims (1)

[Scope of utility model registration request] A viscosity adjusting device provided individually in the plurality of painting guns, a first common pipe for pumping the paint concentrate, a second common pipe for pumping the diluting thinner, branched from the first common pipe. Interposed in each of a first common pipe leading to each viscosity adjusting device, a second branch pipe branching from the second common pipe leading to each viscosity adjusting device, a first branch pipe, and a second branch pipe. A paint supply device consisting of a flow rate regulating valve.