JPH10277436A - Intermediate coater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily change brightness and to eliminate complicated work at the time of changing brightness by connecting a white based coating material supply system and a black based coating material supply system respectively and independently to a rotary atomizer gun. SOLUTION: This intermediate coating device is provided with a white based coating material supply system 1, a black based coating material supply system 2 and a rotary atomizer gun 3. A pipe line 5 of the white based coating material supply system 1 and a pipe line 9 of the black based coating material supply system 2 are independently connected to the rotary spray type coating gun 3. Each of a white based coating material and a black based coating material is supplied to the rotary atomizer gun 3 by controlling the work of motors 7, 11 with a control unit 12 to make each feed rate variable. As a result, mixing the white based coating material and the black based coating material with the optional change of the mixing ratio enables not only to deal with the easy change of lightness but to unnecessitate the disposal of a needless coating material, to save the cleaning work of the pipe lines 5, 9 and to eliminate the complicated works.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intermediate coating apparatus using an intermediate coating obtained by mixing a white paint and a black paint with a variable mixing ratio.

[0002]

2. Description of the Related Art For example, when painting a car body,
The intermediate coat color is required to be concealed by the finish color as much as possible, and the intermediate coat color is required to have a lightness close to the lightness of the finish color. In addition, in the vehicle body painting line, since it is necessary to sequentially perform intermediate coating of a vehicle body having a different finish color, it is necessary to sequentially adjust the lightness with respect to the finish color. An apparatus in which the mixing ratio is arbitrarily changed to perform intermediate coating of a desired brightness is disclosed in, for example,
No. 859 and JP-A-57-35958.

[0003]

However, in the apparatus disclosed in Japanese Patent Application Laid-Open No. 60-859, a white paint and a black paint whose supply amounts are variable are mixed by a mixing device, and then a coating gun is used. When the mixing ratio is changed, the mixed paint before the mixing ratio change remains between the mixing device and the coating gun, so that the remaining mixed paint is discarded and cleaned. It is necessary, and a complicated operation is required when changing the brightness. Also, in the apparatus disclosed in Japanese Patent Application Laid-Open No. 57-35958, the paint after mixing is supplied to the coating gun. Therefore, when the brightness is changed, similarly complicated work is required. .

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an intermediate coating apparatus which can easily change brightness and does not require a complicated operation when the brightness changes.

[0005]

In order to achieve the above object, the present invention provides an intermediate coating apparatus using an intermediate coating obtained by mixing a white paint and a black paint with a variable mixing ratio. White paint supply system that supplies white paint with variable supply amount, black paint supply system that supplies black paint with variable supply amount, and rotary atomization that enables mixing and atomization of multiple paints And a white paint supply system and a black paint supply system are connected to the rotary atomizing paint gun independently of each other. According to this feature, not only can the white paint and the black paint be mixed by arbitrarily changing the mixing ratio to easily cope with the change in lightness, but also unnecessary paint disposal is unnecessary when the mixing ratio is changed. This also eliminates the need for cleaning the pipeline and the like.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below based on embodiments of the present invention illustrated in the accompanying drawings.

In the accompanying drawings, FIG. 1 is a system diagram showing an entire configuration of an intermediate coating apparatus, and FIG. 2 is a longitudinal sectional view of a rotary atomizing type coating gun.

First, in FIG. 1, the intermediate coating apparatus includes a white paint supply system 1 for supplying a white paint with a variable supply amount, and a black paint supply system for supplying a black paint with a variable supply amount. 2 and a rotary atomizing type coating gun 3 capable of mixing and atomizing a plurality of paints.

The white paint supply system 1 comprises a storage tank 4 for storing white paint, and a variable displacement pump 6 interposed in a pipe 5 connected to the storage tank 4. The black paint supply system 2 includes a storage tank 8 storing the black paint, and a variable capacity pump 10 interposed in a pipe 9 connected to the storage tank 8. The operation of the motors 7, 11 for driving the motors 6, 10 is controlled by the control unit 12.

The pipe 5 of the white paint supply system 1 and the pipe 9 of the black paint supply system 2 are connected to the rotary atomizing type coating gun 3 independently of each other.
2 controls the operation of the motors 7 and 11
The white paint and the black paint are supplied to the rotary atomizing coating gun 3 with the supply amounts being variable.

In FIG. 2, a casing 15 of an air motor 14 is screwed to the tip of the gun body 13 of the rotary atomizing type coating gun 3. The air motor 14 includes a rotating shaft 17 rotatably supported by a sleeve 16 press-fitted into a casing 15, and a flange portion 18 provided integrally with a rear end (left end in FIG. 2) of the rotating shaft 17. A large number of row holes 19 are provided on the outer periphery of the flange portion 18. The flange portion 18 is sandwiched between the spacer 20 fitted to the distal end portion of the gun body 13 and the sleeve 16 so as to freely rotate around the axis.

An annular front chamber 21 is formed between the outer periphery of the spacer 20 and the gun body 13, and the outer periphery of the flange portion 18 is formed between the front end of the spacer 20 and the rear end of the sleeve 16. It is arranged facing the room 22. The spacer 20 and the gun body 13 are provided with an air supply hole 23 connected to an air pressure passage (not shown). The spacer 20 has a plurality of turbine air ejection holes 24 for ejecting air from the front chamber 21 to the rear chamber 22. A plurality of row holes 19 in the portion 18 are formed. An air discharge hole 25 is formed in the gun body 13 and the casing 16, and the rear chamber 22 is communicated with the air discharge hole 25 through an exhaust hole 26 formed in the spacer 20.

In such an air motor 14, the turbine air supplied from the air supply hole 23 to the front chamber 21 is blown from the turbine air ejection hole 24 to the row holes 19 of the flange portion 18 to be rotated and driven. The air in the chamber 22 is discharged from the exhaust hole 26 to the outside via the air discharge hole 25.

At the tip of the rotating shaft 17 of the air motor 14, a disk plate 2 having a plurality of outflow holes 28 on the outer periphery is provided.
9 is fixed by a screw member 31. Inside the cup 30, a paint discharge nozzle 33 connected to a white paint supply path 32 provided in the casing 15 and a paint discharge nozzle 33 provided in the casing 15 are provided. And a paint discharge nozzle 35 connected to the black paint supply path 34.
The white paint supply path 32 is connected to the pipe 5 of the white paint supply system 1, and the black paint supply path 34 is connected to the pipe 9 of the black paint supply system 2.

At the tip of the casing 15, a cup 30 is provided.
Provided with a plurality of shaping air ejection holes 36 at circumferentially spaced positions along a virtual circle surrounding the cap 3
7, the cap 37 and the casing 15 are screwed.
An annular air chamber 38 is formed between the air chamber 3 and the tip of the air chamber 3.
8, an air supply hole 39 formed in the casing 15.
Is connected to an air passage for guiding the shaping air pressure.

According to the rotary atomizing type coating gun 3, the cup 30 is driven to rotate in response to the rotation of the air motor 14, and the paint supplied from the paint ejection nozzles 30 and 35 into the cup 30 is centrifugally applied. The mixing is performed while moving forward along the inner surface of the cup 30, and reaches the leading edge of the cup 30 through the outflow hole 28 of the disk plate 329. On the other hand, shaping air is ejected from the shaping air ejection hole 36 toward the outer periphery of the cup 30, and the
The coating material that has reached the leading edge of No. 0 is formed into a predetermined pattern by shaping air and sprayed on an object to be coated (not shown).

The rotation of the cup 30, that is, the rotation of the air motor 14, ensures that the white paint ejected from the paint ejection nozzle 30 and the black paint ejected from the paint ejection nozzle 35 in the cup 30. Will be mixed.

Next, the operation of this embodiment will be described. The white paint supplied from the white paint supply system 1
The black paint supplied from the black paint supply system 2 is surely mixed in the rotary atomization type coating gun 3 and applied to the object to be coated such as a vehicle body. The black paint supply system 2 supplies the white paint and the black paint with the supply amount being variable. Therefore, when the lightness is changed in accordance with the change in the finish color of the vehicle body when painting the body of the automobile, the white paint is used. What is necessary is just to change the mixing ratio of the two paints in the coating gun 3 by changing the paint supply amounts of the system paint supply system 1 and the black paint supply system 2.

Further, since the white paint supply system 1 and the black paint supply system 2 are connected to the rotary atomizing type coating gun 3 independently of each other, the mixing ratio according to the change in brightness is changed. At the time of the change, the paint having the mixing ratio before the change does not remain in the two paint supply systems 1 and 2, so that not only the unnecessary paint is not discarded, but also the cleaning work of the pipe and the like is not required. .

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments, and various design changes can be made without departing from the present invention described in the appended claims. It is possible to do.

[0021]

As described above, the apparatus of the present invention comprises a white paint supply system for supplying a white paint with a variable supply amount, and a black paint supply system for supplying a black paint with a variable supply amount. With a rotary atomizing type paint gun that enables mixing and atomization of multiple paints, the white paint supply system and the black paint supply system are connected to the rotary atomizing type paint gun independently of each other, By changing the mixing ratio arbitrarily, the white paint and the black paint can be mixed to easily cope with the change in lightness. Cleaning work is not required, and there is no need to perform complicated work.

[Brief description of the drawings]

FIG. 1 is a system diagram showing an entire configuration of an intermediate coating apparatus.

FIG. 2 is a vertical sectional view of a rotary atomizing type coating gun.

[Explanation of symbols]

 1 White paint supply system 2 Black paint supply system 3 Rotary atomizing paint gun

Claims (1)

[Claims] 1. A white paint supply system for supplying a white paint with a variable supply amount in an intermediate coating apparatus using an intermediate paint obtained by mixing a white paint and a black paint with a variable mixing ratio. (1), a black paint supply system (2) for supplying a black paint with a variable supply amount, and a rotary atomizing type coating gun (3) capable of mixing and atomizing a plurality of paints, An intermediate coating apparatus characterized in that a white paint supply system (1) and a black paint supply system (2) are independently connected to a rotary atomizing paint gun (3).