JPS59203659A - High pressure mixing type liquid substance coating apparatus - Google Patents

Abstract

PURPOSE:To continuously forming a uniform coating film on a support, by successively providing a change-over valve and an accumulator on the way of a fluid arranged pipe connecting a high pressure mixer and a spray gun while performing the intermittent opening and closing of the change-over valve and the air pressure control of the spray gun. CONSTITUTION:The paint M mixed under pressure in a high pressure mixer 1 is supplied into an accumulator 4 through a pressure change-over valve 3. That is, a solenoid change-over valve 8 is opened by the liquid amount deficiency signal of a level sensor 7 while the change-over valve 3 is opened by the pressurization of an air pump 9 to discharge the paint M into the accumulator 4 and the influence of paint mixing pressure to the side of a spray gun 2 is blocked. When paint supply is finished, the manually operating type spray gun 2 is operated to blow the paint M in the accumulator 4 onto a support. At this time, the paint M is applied onto the support in a continuous non-pulsating state in desired amount portions by air pressure minutely adjusted by an air precise pressure reducing valve 6.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention provides high-pressure coatings such as two-component polyurethane paints.
Spread the combined liquid using an automatic spray canC
This article relates to a device for coating targets.

Unisus: When trying to apply the mixed paint to a support such as a lip using a II automatic spray gun 1. ';I,' When the pressure mixer and spray gun are connected directly, the pressure inside the mixer (polyurethane).

For example, in the case of 50 kgf / Cm'] f7), the amount of coating 1+5 (L) becomes too large, making it difficult to form a uniform, thin coating film on the support 1-. It is conceivable to use a pressure reducing valve between the gun and the gun, but since the source pressure is high, it is necessary to install three pressure reducing valves for high pressure, medium pressure, and low pressure phase, which increases equipment costs and increases the pressure inside each pressure valve. This is not practical as there is a risk that the paint may become sludge or the tire flam in the vacuum gun may be damaged by the paint solvent.Therefore, in the past, the paint was pre-mixed at high pressure and dispensed before using an automatic spray gun. However, this method increases the number of man-hours and reduces the amount of coating.
I get unsteady easily.

In view of the above, the present invention is capable of continuously applying a high-pressure mixed liquid to a support using an automatic spray gun, and has a simple structure and requires less than 100 yen of installation cost. The object of the present invention is to provide a high-pressure mixing type liquid coating device that is not bulky.

The high-pressure mixing type liquid coating device of this invention can be installed in the middle of the fluid piping that connects the high-pressure mixer and automatic spray can! ;I
A J J+ valve and an accumulator are installed in sequence, and the accumulator is equipped with an air precision pressure reducing valve that controls the air pressure in the accumulator, and a level sensor (3J, (ii), and the switching valve is intermittently opened and closed by the signal from the level sensor. With this configuration, the above objectives are achieved.

Hereinafter, one embodiment of the present invention will be described based on illustrated examples.

The embodiment is a coating device for applying a two-component polyurethane paint. Machining cut in the middle of fluid piping between high pressure mixer 1 and automatic spray can 2! A valve (2 points, 2 positions) 3 and an accumulator (bush storage tank) 4 are provided.

This accumulation rake 4 includes a precision pressure reducing valve 6 which is connected to an air pump 5 and controls the air pressure inside the accumulator.
and a level sensor 7. The processing cut-off V-valve 3 is intermittently opened and closed in response to a signal from the level sensor 7. In this embodiment, the transmitting part of the level sensor 7 is pyrolamically connected to the control part of the electromagnetic switching valve F (3 points, 2nd position, 1δ) 8, and the air pump 9 and the pressurizing switching valve 3 are connected via the electromagnetic switching valve R8. It is connected to the control unit via air distribution. In addition, 10.11 in the example is respectively A liquid and
The B liquid tank, 12.13, is the pre-A/B liquid phase pump. Also, although not shown, normally an accumulator 4
is equipped with a stirring device and a safety valve to prevent polyurethane from gelling.

Next, the manner of use of the above embodiment will be explained.

The polyurethane paint (liquid) mixed at high pressure in the high-pressure mixer l by the operation of the pre-A and B-liquid pumps 12 and 13 is supplied into the accumulator 4 through the pressurization switching valve 3. That is, the electromagnetic switching valve 8 is opened (left position connection) due to the liquid ii shortage signal from the level sensor 7, and the electromagnetic switching valve 3 is opened (left position 16 connection) due to pressurization of the air pump 9 for a predetermined period of time. is accumulator 4
The influence of paint mixing pressure on the spray gun side is blocked. After the paint is supplied, the electromagnetic switching valve 8 is closed (right position connected), and therefore the pressurizing switching valve 3 is closed (right position A).
1F'j connection), and the supply of urethane paint into the accumulation lake 4 is stopped. Next, when the start-up air spray can 2 is activated, the polyurethane in the accumulation lake 4 is released. *4 is sucked up and blown onto a support such as a weather strip.

At this time, the paint M in the accumulator 4 is air viscous!
The air pressure finely adjusted by the FI pressure reducing valve 6 ensures that the required amount of air flows into the spray gun 2, and the desired amount of air is continuously applied onto the support without pulsation. Therefore, the coating apparatus of this embodiment can easily cope with the required coating film thickness of +:, ti (+:, ti), and can form a uniform coating film on the support.

Since the high-pressure mixing type liquid coating device of the present invention has the above-described configuration, the high-pressure mixed liquid can be applied continuously and uniformly to the body using an automatic spray can! +r, and the structure is 1 immersion in the cylinder) 1
It doesn't cost you a single penny. Note that the coating 1) J apparatus of the present invention can of course be applied not only to a paint scale but also to adhesive coating.

[Brief explanation of the drawing]

The figure shows an example of the coating device of the present invention. This is a schematic diagram of the agency. 1...High pressure mixer, 2...Automatic air spray can, 3...Pressure switching valve, 4...Accumulator, 6
...Air precision pressure reducing valve, 8...Solenoid switching valve. Patent applicant

Claims (1)

[Claims] This is a device for continuously applying a high-pressure mixed liquid using an automatic spray gun, and is installed in the middle of the fluid piping connecting the high-pressure mixer and the spray gun.
A valve r and an accumulator are installed in sequence, and the accumulator is equipped with an air pressure reducing valve that controls the air pressure in the accumulator, and a level sensor, and the νJ8 valve is intermittently activated by signals from the level sensor # that it is to be opened and closed! j 61 high pressure mixing type liquid coating device.