JP2596967B2 - Masking jig for painting and painting method - Google Patents

Description

The present invention relates to a masking jig and a coating method suitable for two-tone coating.

(Prior art) When different paints such as two-tone paint are applied separately,
The technique of attaching masking paper to the unpainted side is well known. However, a great deal of labor is required for attaching and detaching paper, and paper consumption is large. In order to solve these inconveniences, for example, JP-A-56-166969 and JP-A-58-166969
A technique disclosed in Japanese Patent No. 58168 has been proposed.

Japanese Patent Application Laid-Open No. 56-166969 discloses that a first masking plate is provided between a coating gun and an object to be coated, and a second masking plate is further provided on the object side of the first masking plate for coating. The method for performing

The first masking plate clearly defines the paint parting line, and the second masking plate functions to catch paint splashing around the back of the first masking plate.

Japanese Patent Application Laid-Open No. 58-58168 relates to a painting robot in which a masking device is attached to a robot arm, and the masking device is composed of a masking plate and a support rod for rotatably supporting the masking plate.

(Problems to be Solved by the Invention) In recent years, as a part of pollution prevention, the use of non-solvent paint or a water-soluble metallic paint with no solvent or a very small amount of solvent has been increasing.

Such a paint has a high viscosity and is difficult to atomize, so that the spray pressure of the gun needs to be increased, and the scattering speed of the coating particles increases.

As a result, the second masking plate disclosed in Japanese Patent Application Laid-Open No. 56-166969 is insufficiently shut off, and paint splashes enter the gap between the second masking plate and the object to be coated, making the parting line unclear.

Further, in the masking plate disclosed in JP-A-58-58168,
The gap formed between the curved coated surface and the lower edge of the masking plate and the intrusion of paint splashing from above the masking plate cannot be prevented, and the coated surface deteriorates.

(Means for Solving the Problems) In order to solve the above-described problems, the present invention provides a magnet material on a front surface, an upright wall on a back surface, and connecting the back surface and the upright wall front surface with a curved surface to form an upright wall. The front end of the wall is curved toward the parting line to form a coating masking jig.

(Function) A masking jig having an upright wall for preventing the paint from scattering on the non-painted surface side is attached along a parting line of the vehicle body, and air is blown from the back side of the upright wall toward the masking jig. Spray paint on the painted surface while exhausting from the front side of the standing wall.

(Example) Hereinafter, an example of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a plan view of a masking jig according to the present invention, and FIG.
The figure is the same sectional view.

The masking jig 1 for painting includes a contact member 2 having a substantially strip shape facing the surface to be coated, a magnet member 3 attached to the front surface 2a of the contact member 2 and attaching the contact member to the surface to be coated. ,
An upright wall 4 protrudes from the back surface 2b of the contact member 2.

The magnet material 3 is preferably, for example, a resin magnet plate in which magnetic metal powder is mixed into plastic, and this is fixed to the front surface 2a with an adhesive or a screw.

The base of the front surface 4a of the upright wall 4 is connected to the back surface 2b by a smooth curved surface 4b.
It is curved forward.

In FIG. 2, reference numeral 5 denotes a back surface 4d of the upright wall 4 and a back surface of the contact member 2.
2b, which is a strength member of the upright wall 4 and guides an air flow described later.

The coating masking jig 1 formed into a hollow substantially triangular prism by the abutting member 2, the upright wall 4, and the diagonal member 5 can be mass-produced at a low cost and can be freely shaped if, for example, an integrally molded product of polycarbonate. You can choose.

FIG. 3 and FIG. 4 are a side view and a sectional view of a coating booth suitable for using the coating masking jig 1.

A car body 12 moves horizontally on a conveyor 11 inside the painting booth 10, and robots 14 and 14 having painting guns 13 and 13 are arranged on both sides of the car body 12.

On the ceiling of the coating booth 10, a ceiling filter 15 for averaging and discharging air downward is arranged, and on the floor of the coating booth 10, a floor slat 16 for sucking the air flowing out and passing the paint particles is arranged. Have been.

Above both sides of the vehicle body 12, the ceiling filter
Suspended air ejection ducts 17 and 17 for ejecting air at a higher speed than the air flowing down from 15
Air intake ducts 18, 18 are provided on the floor opposite to 7,17.

The operation of the coating masking jig 1 and the coating booth 10 configured as described above will be described below.

First, as shown in FIG. 5, the coating masking jig 1 is arranged along the parting line L of the vehicle body 12 with the front surface 4a of the upright wall 4 facing downward. The masking jig 1 includes a magnet material 3
And is locked to the vehicle body 12.

The air is sent downward from the ceiling filter 15 of the coating booth 10, and the high-viscosity paint is jetted from the coating guns 13 while sending the air more strongly from the air ejection duct 17.

If the paint is deep on the masking jig 1,
As shown in FIG. 5 (a), the paint advances along the curved line 4b of the upright wall 4 toward the parting line L. This part is reversed following the curved surface 4b and scatters in a direction away from the vehicle body 12, but is pushed back to the coating gun 13 side by the airflow discharged from the air ejection duct 17.

When the paint is shallow on the masking jig 1, as shown in FIG. 5 (b), the paint goes up the front wall 4a of the upright wall via the curved surface 4b and the coating gun 13 at the tip 4c. The air is then deflected to the side and is pushed back to the coating gun 13 by the jet airflow of the air jet duct 17.

The masking jig 1 is made of a plastic injection or extruded product, or a light metal sheet metal bent product.
And the upright wall 4.

(Effects of the Invention) Therefore, according to the present invention, even in the coating of a paint having a high viscosity and a high injection speed, the intrusion of the paint due to the gap between the masking jig and the vehicle body and the sneaking from the tip of the masking jig. Can be prevented, the parting line can be made clear, and a good finished painted surface can be obtained.

[Brief description of the drawings]

1 is a plan view of a masking jig according to the present invention, FIG. 2 is a sectional view of the same, FIG. 3 is a side view of a painting booth, FIG. 4 is a sectional view of the same, and FIGS. ) Is an operation diagram. In the drawings, 1 is a coating masking jig, 2 is an abutting member, 2a is a front surface, 2b is a rear surface, 3 is a magnet material, 4 is an upright wall, 4a is a front surface, 4b is a curved surface, and 4c is a curved surface. The tip, 4d is the back of the standing wall, 12 is the vehicle body, and L is the parting line.

Claims (2)

(57) [Claims] 1. An upright wall is provided on a back surface with a magnetic material provided on a front surface, and the back surface and the upright wall front surface are connected to a curved surface, and a front end of the upright wall front surface is curved toward a parting line. A masking jig for coating characterized by the following. 2. A masking jig having an upright wall for preventing the paint from scattering on the non-painted surface side is adhered along a parting line of the vehicle body, and air is blown from the back side of the upright wall toward the masking jig. Spraying paint on the painted surface while exhausting air from the front side of the standing wall.