JPS5874165A - Cleaning method of painting gun - Google Patents

Abstract

PURPOSE:To prevent clogging of a jet port of a painting gun, by jetting a cleaning agent to the tip part of the painting gun, and after that, jetting cleaning agent wiping-out gas, when a mortar cement painting gun has ended painting jet of once. CONSTITUTION:A painting agent is jetted from a painting agent jet port 27. After jet of the painting agent has been stopped, a gun tip opening 51 of a cleaning gun is directed to the painting agent jet port 27. The painting agent adhering to the head part of the painting gun is scattered by operating a cleaning agent feeding solenoid valve 54, and making a cleaning agent collide against the head part of the painting gun being at a cleaning position. After feed of the cleaning agent has been stopped, jet gas for wiping out the cleaning agent is sprayed to the head part of the painting gun by operating a solenoid valve 55, and the cleaning agent is scattered, dried and wiped out.

Description

[Detailed description of the invention] The present invention relates to a coating gun cleaning method.

It has not been possible to obtain high-quality coating materials for cement mortar press molded products, but it is suitable as a material that should be coated immediately after molding and before curing! This is because I could not obtain anything. Such a coating agent was obtained (Tokugan Sho S@
-0811!00), this coating agent has low water content and high viscosity, so it solidifies quickly, making the coating gun difficult to use.

In order to overcome the above-mentioned defects, the present invention provides a simple and reliable method for cleaning the m-type gun by incorporating it into the painting cycle.
The purpose is to provide a cleaning method that allows the paint gun to finish one spray of paint, and then sprays the paint cleaning agent t11 to the tip of the paint gun for a certain period of time, and then sprays the cleaning agent. This is achieved by a coating gun cleaning method characterized by injecting a cleaning agent wiping gas to the spray gun tip after finishing the cleaning.

As mentioned above, after spraying the cleaning agent, the gas (air) that wipes and dries the cleaning agent can be injected into the paint gun nozzle, so keep the paint gun clean at all times and use paint with low moisture content. However, it can withstand relatively long hours of work.

BRIEF DESCRIPTION OF THE DRAWINGS In the following, the features of the invention will be explained in more detail with reference to the accompanying drawing, which shows an embodiment of the apparatus for use in the method of the invention.

The drawings show a coating gun cleaning device, a coating gun, and a coating agent supply device to the coating gun used in the method of the present invention. A cylindrical tank 14 that stores slurry as a coating agent.
This tank 14 is supported by a machine frame 21, and a rotating shaft 15 passes vertically through the center, and is rotatably supported above and below the tank. The upper end of the rotary shaft 150 is connected to a drive shaft of a rotary motor 13, which is preferably continuously variable speed and is mounted on the machine frame 21 above the tank 140. The lower end of the tank 14 ends in a pump 111. This pump 1
It is also possible to use a spiral diamond 7 ram pump as 6, but one O1# screw O shaft 22 is connected to the stator 34.
It is best to use a monopump that rotates eccentrically in a double-start threaded sleeve. A rotating shaft IS passing through the tank 14 is connected to a threaded shaft 22 of the Mono pump 16.

Attaching the stirring blade 11 to the lower part of the rotating shaft 15 maintains the homogeneity of the coating agent and improves heat transfer. The astringency and viscosity of the paint used are easily affected by temperature. An outlet 24 is provided at the bottom of the pump 16 to keep the temperature of the paint constant by circulating hot water in winter and cooling water in summer. Outlet 21a at the lower end of pump 16, slurry 1
The coating gun 18 for slurry is being used by the coating gun 18.
The front part (II on the right in the drawing) is a paint agent supply chamber 26), and the tip of the paint agent supply chamber 26 has a paint agent injection port 21, and the other end has a K11k scissors agent inlet, making it flexible. 6-coated pipe y11 communicates with the outlet 25 of the pump 1s through a connecting pipe.
A cylindrical sliding tube 20 passes through the gun, extends inside the paint supply chamber 26 at the front of the gun, and is aligned with the paint injection port 2T at its front end. The sliding tube 28 is a supply tube for the injection gas, that is, air, and its tip is formed in a tapered shape, and the inner wall of the paint injection port 2T of the gun casing has a tapered shape inside. Injection port 2TJ
When the ICs are combined, the paint supply chamber 26 is disconnected from the paint nozzle 27, and the rear end of the sliding tube 28 passes through the rear of the gun casing and is connected to the rear of the gun. It's out. And the rear end of the sliding tube 28 is 1
Point 1, - Connected to the air source 80 via the injection gas on-off valve 2s, which is preferably a normally closed VWi solenoid valve.
I am under control. A cylinder chamber 31 for operating the sliding tube 28 is formed at the rear of the gun, and the cylinder chamber 5tKti sliding tube 2
An actuating histone 32 that is fitted and fixed around 8 slides. An O-ring 33 is connected between the wall of the cylinder chamber 31 and the piston 32.
sealed by. L1iK separating the cylinder chamber 31 and the paint supply chamber 26 is provided with a through hole 34 for guiding the sliding tube 28, and both chambers are sealed by an O-ring 35. Inner end Ka working gas inlet 36 of cylinder chamber 31
This is connected to working air via a switching valve 31, which is preferably a two-point, two-position, closed-circuit solenoid valve. Cylinder chamber $1 (D outer end or +11 after the gun casing is a return spring 38 between the end wall and the piston 32
to be placed. Butterfly sliding pipe 28 and coaxial screw gate 4 on the oven wall
0 is provided, and an adjusting screw 41 having an opening 311 through which the sliding tube 28 passes through the center is screwed into the flange opening 40, and the piston 32
The end position of the sliding tube 28, that is, the retracted position of the sliding tube 28 can be adjusted KL, thereby making it possible to adjust the amount of paint supplied at the paint injection port 27.Sliding tubes 28 and 111! Although the openings of the I screws 41 may be slidable, a gap may be provided.

If you want to make sliding contact, use it on the end wall! 2! Air relief opening 42t
- Required - An annular i-fuller 43 is attached and fixed around the front end of the painting gun 18, and the inner wall at the tip of this annular matsutsu 43 surrounds the injection port 21 so as to form an annular injection gas chamber 4.
4 is provided inside and the 2
An opening 4S facing diagonally forward and inward from the injection gas chamber 44 is provided at the location. Matsu 9-43 is also provided with an inlet 47 that communicates air *ao to the injection gas chamber 44 via a normally closed type electromagnetic 9P46.The air supplied to this muff j-43 is Opposing through diameter 2
Sekiguchi 45) Crossing airflow VI: forming forward,
Forms a paint spray pattern.

A cleaning gun that sprays cleaning agent toward the tip of this paint gun 18! 48. The illustrated cleaning device, ie, the cleaning gun 48, has a cleaning agent supply path 49 on its axis, and has a circumference of 1! I
For example, four or six injection gas supply paths 5o are arranged at equal angular intervals and parallel to the supply path 411, and communicated with the cleaning agent supply path 4s near the gun tip opening 51 to supply the cleaning agent. The inlet opening 52 at the other end of the passage 49 and the common inlet opening s3 of the cleaning agent wiping jet gas supply path 50 are connected to the cleaning agent tank 56 and the common inlet opening s3 of the cleaning agent wiping jet gas supply path 50, respectively, via one-bottom, one-position normally closed solenoid valves 54 and 55, respectively. A cleaning agent tank 51iK connected to the air source 30 stores cleaning agents such as alcohol and water thinner.

The operation of the coating apparatus having the above structure will be described below.

When the coating device is driven, the electromagnetic valves 211, 37, and 46 operate simultaneously with the rotation of the Tanabata 13, allowing communication between the coating agent injection port 2T of the coating gun 18 and the coating agent supply chamber 28, and the injection gas for conveying the coating agent. Injection of pattern forming gas begins.

The injection is stopped by stopping the motor and closing the opening of the paint supply chamber 2T.

Since the motor 13 is of a continuously variable speed type, it is possible to adjust the supply amount of the coating agent and the injection amount of the coating gun.

The spraying of the pattern forming gas and the spraying of the paint spraying gas are continued even after the spraying of the paint has stopped.
l'j.

Peel off the paint from the tip of the paint gas, especially around the injection port 2T. The paint gun paints the molded part at the painting position, and this -
When the coating operation is completed and the operation of the coating gun is stopped, the coating gun is rotated to the tt position or to the cleaning position. When the cleaning device is activated, the cleaning agent supply solenoid valve s4 is activated, and the cleaning agent collides with the front end of the coating gun in the cleaning position, causing the paint to scatter. The jetting power of the cleaning agent can be increased by operating the injection gas supply solenoid valve sq at the same time as the cleaning agent is supplied, but when the cleaning agent can be sprayed with just the internal pressure of the cleaning agent tank and the widespread scattering of the cleaning agent becomes an obstacle. The injection gas is not used to transport the cleaning agent, and after the supply of cleaning agent is stopped, the injection gas is supplied to the coating gun to wipe off the cleaning agent by operating the solenoid valve 56, and the spraying gas is supplied to the coating gun to wipe off the cleaning agent.
Scatter and dry any cleaning agent present. Of course, when starting the supply of the cleaning agent and the injection gas at the same time, it is sufficient to stop the supply of the cleaning agent and then continue supplying only the injection gas 6.

After stopping, the painting gun moves from the cleaning position to the painting position. ! Scissors''/12) 131st period has ended f, b.

[Brief explanation of drawings]

The drawings are a schematic diagram and an operational system diagram of a coating device used in the method of the present invention. 18...Painting gun 30...Air source 49...Cleaning agent supply path 50...Cleaning agent wiping gas supply path 56...Cleaning agent tank Patent applicant Shigeo Ando

Claims (1)

[Claims] When the paint gun finishes spraying one coat of paint, a paint cleaning agent is sprayed at the top of the painting gun for a certain period of time, and after the spraying of the cleaning agent is finished, a cleaning agent wiping gas is sprayed on the tip 111BK of the scissors painting gun. A painting gun cleaning method characterized by the following.