JPH1128394A - Closed type spray gun - Google Patents

Abstract

PROBLEM TO BE SOLVED: To expand a range of usage of a spray gun by improving a paint vessel and to maximize performance of paint at the same time and also to save painting work. SOLUTION: The spray gun is made into a closed type by using a bellows vessel 5 made of resin having stretching properties for a paint vessel of the spray gun for coating and the function of the spray gun is enhanced. Further, a function as the vessel for prolonged preservation is added. Energy conservation of cleaning work is enhanced by providing a branched pipe 3 and a changeover valve 4.

Description

The present invention seeks to expand the range of use of a coating machine by using a resin bellows for a paint container of a spray gun for spray coating and sealing the inside by using the expansion and contraction of the bellows. Things. Conventional spray gun paint containers are made of metal or resin, and the container lid has a small hole for air supply. Therefore, if the spray gun is tilted or shaken, paint may leak from the small holes, and careful operation is required. In addition, most of recent paints are of a type in which a curing agent is mixed and cured by a chemical reaction. In particular, an undercoat paint for automobile repair (Primer Surfacer (hereinafter referred to as "Prasaf")) requires quick drying. Therefore, the curing time is designed to be short, and the pot life after mixing the curing agent is considered to be 1 to 2 hours depending on the outside air temperature. For this reason, it is the current practice to mix plasaf and hardener each time the undercoat is applied, discard the excess plasaf after application, and clean the spray gun. Therefore, waste of Prasaf and the labor of cleaning work are major obstacles in labor saving of painting work. The present invention has been made in order to eliminate the obstacle, and FIG. FIG. 1 shows the configuration of a conventional general spray gun. FIG. 1 shows the configuration of the spray gun of the present invention. FIG. 3 shows the operation of the resin bellows container (5) of the present invention. FIG. First, paint (8) is applied to the container in FIG. And attach it to the spray gun body (1). Then, when compressed air flows into the spray gun to start spraying, the air above the container is sucked out, and FIG. The bellows part shrinks as shown in the figure, and the inside of the container is filled with the paint, and the contact between the paint and the air is completely cut off. Thus, the curing of the paint is suppressed, and the pot life can be extended. In addition, in the case of a conventional container at the time of high temperature and high humidity, there is a possibility that dew condensation occurs inside the container and water is mixed into the paint, thereby deteriorating the performance of the coating film. However, using the container of the present invention is safe. Further, since the lower part of the bellows container is pushed up by hand and pressurized, the discharge amount of the paint can be increased, so that a high-viscosity paint can be applied. And since the container is sealed, there is no fear of paint leakage, and painting from any angle is possible. And FIG. FIG. Branch pipe (3) to connection pipe (2) shown in
After the coating is completed, the flow path is changed by the switching valve (4) and the thinner for cleaning is injected into the branch pipe (3). Only the paint channel can be cleaned. Then, when painting again, the flow path may be returned to the original state by the valve. By repeating this operation, the labor of the cleaning operation can be largely saved. Also,
If you want to save this paint after painting, see Figure 6. The upper lid (9) provided with a small hole for air release as shown in (1) is tightened about half, then the bellows container (5) is shrunk to expel the air inside, and finally the upper lid (9) is completely tightened. Then, it can be used as a sealed storage container for paint. Further, since the bellows expands and contracts according to the amount of the paint, it is a great advantage that the storage space can be reduced.
In addition, since this container can be manufactured at low cost, it is basically disposable, and when the paint is discarded, the entire container is discarded, so that it is also environmentally friendly.

[Brief description of the drawings]

FIG. 1 is a front view of a spray gun according to the present invention.

FIG. 2 is a side view of the spray gun of the present invention.

FIG. 3 is a front view of a general spray gun.

FIG. 4 is a sectional view of the container of the present invention.

FIG. 5 is a sectional view of the container of the present invention.

FIG. 6 is a sectional view of a lid of the container of the present invention.

[Explanation of symbols]

 (1) Spray gun body (6) Lower lid (2) Connection pipe (7) Paint container (3) Branch pipe (8) Paint (4) Switching valve (9) Upper lid (5) Bellows container

Claims (1)

[Claims] 1. A closed type using resin bellows for a paint container of a spray gun for spray coating.