JPS5843260A - Washing device for painting gun - Google Patents

Abstract

PURPOSE:To incorporate washing of painting guns in the cycles of painting work and to wash the painting guns easily and surely by stopping the injection of painting materials by the painting guns then bringing a detergent and an injection gas into collision against the top parts of the guns simultaneously. CONSTITUTION:A passage 49 for supplying a detergent and a passage 50 for supplying a gas for wiping of the detergent are provided in a washing gun 48 of a cylindrical shape. The passage 49 is disposed concentrically to the axial line and the passage 50 around the passage 49, respectively and both passages are connected near an injection port 51 at the tip. Further, the passage 50 is connected to an air source 30 and the passage 49 to the tank 56, respectively, and the gun 48 is so disposed that the axial line thereof passes through the top part of a painting gun 18 in a pause position. More specifically, the detergent and the injection gas are brought into collision against the top of the painting gun simultaneously after the injection of the painting material by the painting gun is stopped, whereby the washing of the painting gun is incorporated into the cycles of the painting work and the washing is accomplished easily and surely.

Description

[Detailed description of the invention] The present invention relates to a paint gun cleaning device.

Coating agent 11 for cement mortar press molded products,
I haven't been able to get a good quality one since, but it's the 11th
Cedar u'ffi {& Because a suitable material to be painted before curing could not be obtained. Such a coating agent is
(Japanese Patent Application No. 56-091500), however, this coating agent has a low water content and high viscosity, so it hardens quickly and clogs the coating gun.

Therefore, in order to overcome the above-mentioned defects, it is an object of the present invention to provide a cleaning device that has a simple structure and is reliable in that the cleaning of the painting gun is incorporated into the painting cycle, and the purpose is to clean the painting gun in the rest position. A cleaning agent supply path and a cleaning agent wiping gas supply path are installed in the cylindrical body, which is arranged so that its axis passes through the front end.
IIIa! Next, the Sentsuno is placed concentrically around the J, the tip injection 11 is connected, the &li'C inner 11 (inner passage 1 is connected, and the cleaning agent wiping gas 11 (ship channel is used as the air source) is used for cleaning. The agent supply path is connected to the cleaning agent tank (connected by a paint gun cleaning device with 7 drips and all features).

□ ・:1・ As mentioned above, after spraying the cleaning agent, the gas (air) that wipes and dries the cleaning agent can be injected into the painting gun [1], so the painting gun can always be kept clean and the paint can be painted with less moisture. Even with the use of chemicals, it can withstand relatively long periods of work.

In the following, the features of the invention will be explained in more detail with reference to the accompanying drawings, which illustrate one embodiment thereof.

The drawings show a paint gun cleaning device, a paint gun, and a paint agent supply device to the paint gun according to the present invention.

A cylindrical tank 14 for storing slurry as a coating agent is shown, and this tank 14 is supported by a machine frame 21, with a rotating shaft 15 passing vertically through the center, and rotatably supported in the tank. ing. The upper end of the rotating shaft 15 is connected to the tank 1.
4. A drive motor for a rotary motor 3, which is preferably continuously variable speed, is mounted on the machine frame 21 above the motor 4.

It is connected to the moving shaft. The lower end of the tank 14 also ends in a pump 16. Although it is possible to use a helical diaphragm pump as the pump 16, a single threaded shaft 22 is moved eccentrically through a double threaded sleeve provided in the stator 34. Therefore, it is better to use a rotating Mono pump.

A rotating shaft 15 passing through the tank 14 is connected to a mono pump 16.
It is connected to a screw shaft 22 of. 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. Since the concentration and viscosity of the paint used are easily affected by temperature, the tank 14 is surrounded by a muffler 19, with a thermally conductive medium (i.e. water) inlet 23 at the bottom and an outlet [124] at the top. In the winter, hot water is circulated through cooling water in the summer to keep the temperature of the paint constant.

The outlet 25 at the lower end of the pump 16 is connected to the slurry coating gun 18.
is connected to. The slurry coating gun 18 has a coating agent supply chamber 26 at the front (right side in the drawing), a coating agent injection port 27 at the tip of the coating agent supply chamber 26, and a coating agent inlet at the other end. It communicates with the outlet 25 of the pump 16 by a flexible connecting tube. A cylindrical sliding tube 28 passes through the axis of the coating gun 18 and extends inside the coating agent supply chamber 26 at the front of the gun, with its front end aligned with the coating agent injection port 21 . The sliding tube 28 is a supply tube for 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 is also tapered.
When the sliding pipe 28 is moved and joined to the injection port 27, the paint supply chamber 26 is blocked from the paint injection port 2T. The rear end of the sliding tube 2B passes through the rear part of the gun casing and protrudes from the rear end of the gun. The rear end of the sliding tube 28 is connected to an air source 30 via an injection gas on-off valve 29 which is preferably a one-bottle, one-position normally closed type solenoid valve. A cylinder chamber 31 for operating the sliding tube 28 is formed at the rear of the gun, and an operating piston 32 that is fitted and fixed around the sliding tube 28 slides in the cylinder chamber 31. The space between the wall of the cylinder chamber 31 and the piston 32 is sealed by an O-ring 33. The wall separating the cylinder chamber 31 and the paint supply chamber 2B has a passage (L34) for guiding the sliding tube 28, and both chambers are sealed by an O-ring 35. The outer end of the gas inlet 31, that is, the rear end of the gun casing, is provided with a gas inlet 36 and connected to a working air source via a 2-boat, 2-position normally closed solenoid valve and a suitable switching valve 31. , a return spring 38 is disposed between the end wall and the piston 32.

A threaded opening 40 coaxial with the sliding tube 28 is provided in the end wall, and an adjusting screw 41 having an opening 3g through which the sliding tube 28 passes through the center is screwed into the opening 40 to adjust the end position of the piston 32, i.e. 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. Although the sliding tube 28 and the opening of the adjusting screw 41 may be slidable, a gap may be provided. If sliding contact is to be made, an air relief opening 42 is required in the end wall. Paint gun 18
An annular muffler 43 is attached and fixed around the front end, and the inner wall of the tip of the annular muffler 43 surrounds the injection port 2T, and an annular injection gas chamber 44 is provided inside the muffler 43.
- Openings 45 facing diagonally forward and inward from the injection gas chamber 44 are provided at two locations across the diameter on the tip-inward side. The muffler 43 also includes an inlet 4T that communicates the air source 30 with the injection gas chamber 44 via a one-bottom, one-position normally closed solenoid valve 46. The air supplied to this muffler 43 forms intersecting air flows forward through two diametrically opposing openings 45, forming a paint spray pattern.

A cleaning gun that sprays cleaning agent toward the tip of the coating gun 18 is indicated by 48. The illustrated cleaning device, that is, the cleaning gun 48, has a cleaning agent supply passage 49 on its axis, and four or six injection gas supply passages 50 arranged parallel to the supply passage 4B at equiangular intervals around the cleaning agent supply passage 49. 1 between the gun tips.
It communicates with the cleaning agent supply path 49 near the hole 51, and connects the inlet opening 52 at the other end of the cleaning agent supply path 49 and the common inlet opening 53 of the cleaning agent wiping injection gas supply path 50 to one bottle. The cleaning agent tank 56 and the air source 30 are connected through one-position normally closed solenoid valves 54 and 55, respectively. A cleaning agent tank 56 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 29, 37, and 46 operate simultaneously with the rotation of the motor 13, allowing communication between the coating agent injection port 2T of the coating gun 18 and the coating agent supply chamber 26, and the injection gas for conveying the coating agent, as well as pattern formation. Gas injection 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 injection of the pattern forming gas and the injection of the coating agent injection gas are continued even when the injection of the coating agent is stopped, and the coating agent is peeled off at the leading end of the coating gas, particularly around the injection 1127. When the paint gun coats the molded product in the coating station 1'L and the operation of N'It+-4#JJ is stopped after this -th coating is completed,
Simply rotate the paint gun to the cleaning position or to the cleaning position. When the cleaning device is activated, the cleaning agent supply solenoid valve 65 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 66 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 wide spread of the cleaning agent becomes an obstacle. Injected gas 1.1 For transporting cleaning agent, after stopping the supply of cleaning agent, the injection gas is supplied to the painting gun to wipe away the cleaning agent. ,
Spray and dry any cleaning agent present at the top of the paint gun. 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.

After stopping, the first cycle or painting gun moves from the cleaning position to the painting position, and one cycle of the first loading gun ends.

[Brief explanation of the drawing]

The drawings are a schematic diagram and an operation system diagram of the coating apparatus of the present invention. 18...Painting gun 30...Air source 49...Cleaning agent supply path 50...Cleaning agent t+: Wiping gas supply path 11□:1 56...Par cleaning agent evening patent applicant Ando Naruo

Claims (1)

[Scope of Claims] (11) A cleaning agent supply path and a cleaning agent wiping gas supply path are provided in a cylindrical body arranged so that its axis passes through the front end of the painting gun in the rest position. (One of the supply channels is placed on the axis and the other is arranged concentrically around the force L, both 11 are connected near the tip injection port (the supply channels are connected 12, the cleaning agent wiping gas supply channel is used as the air source, and the cleaning agent fE is placed concentrically around the force). Connect the cleaning agent supply path to the cleaning agent tank (+- characteristics and °t4I paint gun cleaning device. (2) Connect the cleaning agent supply path to the 1st m magnet?
In addition to communicating with the cleaning and cutting tank C, the cleaning and cutting gas lI
Paint gun cleaning according to the first patent scope, characterized in that the L supply path is connected to the air source via a second solenoid valve, and the stop of the injection gas I- is delayed by a certain period of time from the stop of the cleaning agent. Device. (3) 6; The painting gun cleaning device according to claim 2, characterized in that the supply start operation of both the electromagnetic valves and the convenience L for transporting the cleaning agent for cleaning agent wiping gas are performed simultaneously. 1
ilt.