JPS6235824B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a spray coating apparatus, and more particularly to the removal of paint that has dried on the inside of the gun body and the outside of the nozzle.

Spray painting is widely used in the field of industrial painting. In recent years, spray coating using a water-based high viscosity paint (for example, stucco finish coating) has been increasingly used. When applying this type of high-viscosity paint using a spray gun, the paint gradually dries and solidifies inside the gun body even during operation, which tends to cause clogging inside the gun body. In addition, sprayed paint adheres to the outside of the nozzle, dries and solidifies, and gradually grows into an icicle-like form (for example, in winter, it is easy to
It grows to a length of 50 mm in ~50 minutes and in 15-20 minutes in summer). As a result, the coating efficiency decreases, and furthermore, the coating pattern becomes distorted, which adversely affects the quality of the product. Therefore, conventionally, the nozzle cover and nozzle of the gun body were removed and the dried and solidified paint was removed and cleaned manually.
It has been difficult to completely remove anything that has flowed back into the air circuit.

In view of the above-mentioned current situation, the present invention provides a new and improved spray coating device that can quickly remove dried and solidified paint inside and outside the gun body and maintain extremely good coating efficiency and product quality. The purpose is to

The purpose of the above is that the paint inflow pipe and the paint atomizing air inflow pipe are connected to the gun body through the socket, respectively, and the joint is connected between the air inflow pipe socket and the gun body. A water inflow pipe for cleaning the inside of the gun body is connected through the nozzle; on the other hand, a scraping means movable relative to the nozzle of the gun body is provided to scrape off dried paint adhering to the outside of the nozzle of the gun body. This is achieved by the spray coating apparatus of the present invention, characterized in that the scraping means is provided with a water outlet for cleaning the outside of the nozzle and a water inlet pipe for supplying the cleaning water.

Hereinafter, the present invention will be explained using specific examples with reference to the drawings.

FIG. 1 is a schematic perspective view of the apparatus of the present invention. In the apparatus of the present invention, the paint gun body 1 includes a paint inflow pipe 2.
and an air inflow pipe 3 for atomizing paint are attached via tips 4 and 5, respectively. In particular, in the device of the present invention, a cleaning water inflow pipe 6 is connected via a socket 7 between the air inflow pipe socket 5 and the gun body 1. A partial sectional view of the internal structure of such a spray painting gun is shown in FIG. During normal painting, the cleaning water inlet pipe 7 is closed, and the pipes 4 and 5 are closed.
is opened, and the paint supplied from the paint inlet pipe 2 is mixed with air from the air inlet pipe at the nozzle 8 and sprayed.

In the device of the invention, a scraping means 9 is provided which can move relative to the nozzle 8. This relative movement may be such that the scraping means 9 is fixed and the gun body 1 is moved so as to skim over it, or vice versa. Furthermore, both may be movable. As shown in FIG. 1, the scraping means 9 is preferably in the shape of a spatula, or has a stretched wire rod, etc. The material of the scraping means 9 is, for example, rubber, and the material stretched with a wire rod is piano wire. A water outlet 10 is provided at the upper part of the scraping means 9, and a water supply pipe 11 for supplying water is further connected to the outlet 10. It is preferable to cover the scraping means with a suitable cloth 12,
Further, it is preferable to provide a gutter 13 for receiving the washed liquid blown out from the water outlet 10 and used for washing the outside of the nozzle 8.

In the apparatus of the present invention, the gun body internal cleaning water and the nozzle external cleaning water are supplied via pipes 6 and 11, respectively, by a plunger type water pump 14, for example. The liquid drained from the gutter 13 of the scraping means 9 is collected into a tank 17 through pipes 15 and 16 and recycled by the pump 14, or when the concentration of paint in the collected liquid becomes high. Take it out from the drain 18 of the tank 17. 19
is an air supply source for the pump 14, 20 is an air filter, 21 is a water source, 22 is a filter, and 23 is a suction filter.

FIG. 3 is a schematic explanatory diagram showing the usage state of the device of the present invention. In this case, the gun body 1 is fixed to the swinger 25 of the reciprocator 24. When the workpiece A is transferred toward the front on the conveyor 26, the gun body 1 is transferred to the reciprocator 24.
Spray painting while moving from side to side. To remove paint that has dried and solidified inside the gun body, use the paint inflow pipe 4 of the gun body 1.
After closing the air inlet pipe 5, the gun body 1 is positioned on the right side and stopped, and the cleaned liquid recovery means 27 is positioned below it. The collecting means 27 may be normally located outside and can be moved to the position shown in the figure if necessary. Next, the cleaning water inflow pipe 7 is opened and cleaning water is forced in, thereby peeling off and dissolving the dried solidified paint inside the gun body 1, and discharging it from the nozzle 8 as a cleaned liquid.
7. Collect. In addition, to remove dried solidified paint that has adhered to the outside of the nozzle 8 in the form of icicles or whiskers, close all the tips 4, 5, and 7 of the gun body 1, position the gun body 1 on the left side, and scrape it off. The means 9 is moved by the telescopic cylinder 28 to just below it and scraped. At the same time, water is blown out from the water outlet 10 to clean the outside of the nozzle 8. As a result, the outside of the nozzle is moistened, and further adhesion of paint can be prevented as much as possible.

In addition, in the apparatus of the present invention, an electromagnetically actuated type can be used for remote control, and furthermore, it can be operated automatically.

As described above, the device of the present invention can quickly remove dried and solidified paint from inside and outside the gun body 1 with almost no manual effort, and can also reuse the cleaned liquid, thus saving resources. It also greatly contributes to labor saving.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view of the device of the present invention, and FIG.
The figure is a partial sectional view of the spray painting gun, and FIG. 3 is a schematic explanatory view showing the usage state of the apparatus of the present invention. 1: Painting gun body, 2: Paint inflow pipe, 3: Air inflow pipe, 4, 5, 7: Kotoku, 6: Cleaning water inflow pipe, 8: Nozzle, 9: Scraping means, 10: Water outlet, 11: water supply pipe, 13: gutter, 14: water pump, 15, 16: pipe, 17: tank, 24: reciprocator, 27: washed liquid recovery means.

Claims (1)

[Claims] 1. In a spray painting device using a spray painting gun, a paint inflow pipe is connected to the gun body via a kettle, and an air inflow pipe for atomizing paint is connected to the gun body, and the air inflow pipe and the gun body are connected to each other via a kettle. A water inflow pipe for cleaning the inside of the gun body is connected through a cot, and a scraping means movable relative to the nozzle of the gun body is provided to scrape off dried paint adhering to the outside of the nozzle of the gun body. A spray coating apparatus, characterized in that a water outlet for cleaning the outside of the nozzle and a water inlet pipe for supplying the cleaning water are attached to the scraping means.