JPH0342071A - Pretreating device for painting and painting booth - Google Patents

Abstract

PURPOSE:To provide a pumping device for low pressure water feeding which is trouble- free and inexpensive and a paint recovering device which is also trouble-free and inexpensive and to clean air by adopting a downflow system for a washing liquid, etc., and providing a water curtain on the front face of painting nozzles. CONSTITUTION:The washing liquid, etc., in a tank 4 are pumped up to flow down from downflow holes 5, 5a... of receiving trays 6, 6a..., by which a large volume of the washing liquid, etc., are supplied to above a work W and the work is sufficiently washed. The washing liquid, etc., are circulated by returning to the inside of the tank 4. The work is successively moved in treating tanks 1, 1a... with conveyor, and are thereby subjected to pretreatments, such as degreasing, rinsing and filming. The work is thereafter transported to the painting booth 14 where the work is painted by the paint sprayed from the painting nozzles 20, 20a.... The water in the tank 21 is pumped up at this time to flow over from the receiving trays 22, 22a... from which the water flows down on the surface of a partition wall 17 to form the water curtain to capture and recover the sprayed paint. The paint is captured in the water at the time when the simultaneously sprayed air passes the downflow holes 5, 5a... of a guide plate 29 in a ventilation chamber 19. The clean air is thus discharged.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] The present invention relates to a pre-treatment device and a painting booth for painting which are designed to reduce the occurrence of failures.

Traditionally, pre-treatment equipment for painting involves installing a tank with an open top at the bottom, attaching a shower nozzle to the tip of a pipe connected from the tank, and placing the workpiece in front of the shower nozzle. The cleaning liquid or water was sucked up from the tank using a pump installed in the middle of the pipe, and forced to spray it onto the workpiece through a shower nozzle. Pumps have the disadvantage of being expensive, and although the shower nozzle has many fine nozzles, the nozzles may become clogged with dirt, making continuous operation impossible, or dust may rub against the inside of the pump. This has the drawback that the blades etc. may wear out and break down, and many shower nozzles must be installed in the direction of movement and on the front and back surfaces of the workpiece, making the equipment complex and expensive. Because of this, the cleaning liquid spouted from the shower nozzle has the disadvantage of scattering after hitting the workpiece, and the workpiece was immersed in a dip tank for coating pretreatment such as rust prevention treatment, but this has the disadvantage of requiring a large space. Was.

In addition, as a painting booth, adsorption paper was placed on the back and a spray nozzle was placed in front, and the workpiece was placed in front of the spray nozzle for painting. It has the disadvantage of requiring a lot of effort to replace, and also has the disadvantage of wasting paint.

Accordingly, the present invention uses a flow-down system for the cleaning liquid, etc., so that the cleaning liquid, etc. can be sent at low pressure without damaging the lift device, and is simple and inexpensive, and also has a dipping effect and saves space. Furthermore, by installing a pre-treatment device for painting that prevents the scattering of cleaning liquid, etc., and a water curtain in front of the painting nozzle, the paint can be collected, eliminating the need for absorbent paper and preventing the paint collection device from malfunctioning. The purpose of this invention is to provide a painting booth that is simple, inexpensive, and capable of recovering paint mixed in the air and cleaning the air. In view of this, the present invention includes a treatment tank with a conveyor installed at the top, a tank disposed at the bottom, and a saucer with a flow hole bored at the top, and the tank and saucer are connected by a lift device. The lift device is a pre-treatment device for painting with a screw shaft inside the pipe body, a box body with a conveyor on the top, a bulkhead installed, one nozzle installed, and a tank placed at the bottom of the box body. ,
A saucer is placed along the bulkhead at the top, and the tank and saucer are connected by a lift device.The lift device has a screw shaft built into the pipe body, and a ventilation chamber and fan are provided behind the bulkhead to ensure ventilation. The present invention attempts to solve the above-mentioned drawbacks by providing a painting booth in which a guide plate with diagonal flow holes is arranged in the chamber and a water pipe is arranged on the guide plate.

Tachi-ri This invention pumps up the cleaning liquid, water, coating liquid, etc. in the tank, flows down from the flow hole of the saucer, supplies a large amount of cleaning liquid, etc. above the workpiece, performs sufficient cleaning, and removes the cleaning liquid, etc. The workpieces are returned to the tank and circulated, and the workpieces are sequentially moved through the treatment tanks by a conveyor, where they are subjected to pretreatment such as degreasing, water washing, and coating.After the pretreatment has been completed, the workpieces are sent to the coating booth, where they are passed through the coating nozzle. Painting is done with the sprayed paint, and at this time the water in the tank is pumped up, overflows from the saucer, flows down the surface of the partition wall, forms a water curtain, captures and collects the paint sprayed from the painting nozzle, and During the painting process, the paint is sprayed with a large amount of air, and when it passes through the flow holes of the guide plate in the ventilation chamber, the paint is captured by water and clean air is exhausted.

1. Hereinafter, an embodiment of the present invention will be described based on the drawings. 1.1a... is a treatment tank of a pretreatment device that performs degreasing, water washing, coating, etc. in painting; ...
consists of a box body 2 and is connected continuously, and a processing tank], 1a
A conveyor 3 for suspending the workpiece W is disposed above the conveyor 3.

4 is a tank with an open top end, and this tank 4 is connected to the processing tank 1.
It is placed at the bottom of 1a..., and the processing till, la...
A saucer 6.6a having a large number of flow holes 5.5a is disposed above the tank 4, and the tank 4 and the saucer 6.6a are connected by a lift device 7.

8 is a pipe body disposed vertically, the lower end of the pipe body 8 is sunk into the tank 4, the upper end protrudes from the box body 2,
A spiral screw shaft 10 rotated by a motor 9 is installed inside the pipe body 8, and a connecting pipe 11, lla is disposed from the upper end of the pipe body 8 to the receiving tray 6.6a.

12 is a heater immersed in the tank 4, 13 is an inspection door, and a filter may be immersed in the tank 4.

In addition, in the lift device 7, a heat-resistant and chemical-resistant rubber seal may be attached to the end edge of the screw of the screw shaft 10 to ensure the pumping ability.

14 is a painting booth, and the f! ! ! The coating booth 14 consists of a box body 15, and a conveyor 16 for suspending the workpiece W is disposed at the top.A partition wall 7 is erected in the center of the box body 15 with the bottom open, and a painting room 18 is formed. and ventilation chamber 19
The cylindrical surface of the box body 15 is equipped with a coating nozzle 20.2.
0a is installed.

Reference numeral 21 designates a tank with an opening at the top. The tank 21 is placed at the bottom of the coating booth 14. A saucer 22 is placed at the top of the coating booth 14 along the partition wall 17. The tank 21 and saucer 22 are connected to a lift device 23. are connected by.

24 is a vertically arranged pipe body;
The lower end of 4 is inserted into the tank 2], a spiral screw shaft 26 rotated by a motor 25 is installed inside the pipe body 24, and a connecting pipe 27 is arranged from the upper end of the pipe body 24 to the saucer 22. ing.

28 is a fan installed in the upper part of the ventilation chamber 19, and in the middle part of the ventilation chamber 19, a guide 129 such as a punching plate with a large number of flow holes 5.5a... is arranged diagonally. At the same time, the water conduit 3 is connected from the middle part of the pipe body 24.
0 is connected on the guide plate 29.

In addition, in the lift device 7.23, a 11wj device 3] for the flow rate of cleaning liquid or water, etc. is installed to adjust the amount of flowing water in the treatment tanks ], ]a... or the amount of water in the water curtain in the painting booth 14. For example, a passage 71 hole 32 may be bored in the lower part of the pipe body 8.24, and a closing cover 33 that can open and close the opening surface of the water passage hole 32 may be provided.
It is adjusted with.

Next, to explain the operation of the pre-treatment equipment shrimp coating booth for painting according to the present invention, the cleaning liquid in the tank 4,
For water, coating liquid, etc., use screw shaft 1 using Mozu-9.
The water is pumped up by the 00 rotation, and flows into the saucer 6.6 through the connecting pipe 1], lla, and flows through the drain hole 5.5 of the saucer 6.6a.
a...≦A large amount of cleaning liquid flows down and is deposited above the work W, so that the surface of the work W is constantly covered with cleaning liquid, etc.! The workpieces W are thoroughly cleaned by being immersed in the workpieces, and the old cleaning solution is returned to the tank 4 and circulated.Also, the workpieces W are sequentially moved through the processing tanks 1a by the conveyor 3, Six treatments are performed, including degreasing, washing, and coating.

The workpiece W that has been pretreated is transported to the coating booth 14 by the conveyor 16L, and is coated with the paint sprayed from the coating nozzle 20.20a. At this time, the water in the tank 21 is pumped up by the rotation of the screw shaft 26 by the motor 25. The water flows into the saucer 22 via the connecting pipe z7, overflows from the saucer 22, flows down the surface of the partition wall 17, forms a water curtain, and is sprayed onto the coating nozzle 20.
．． The paint sprayed from 20a is captured and collected, and during the painting process, the paint is sprayed together with a large amount of air, and when the fan 28 is driven, the air mixed with paint flows from the painting chamber 18 to the ventilation chamber 19, and the ventilation chamber In one guide plate 29
When passing through the flow holes 5.5a..., the paint is captured by water and clean air is discharged.

(Effects of the Invention) In short, the present invention provides a treatment tank with a conveyor 3 disposed in the upper part, a tank 4 in the lower part of the processing tank 1a...
A saucer 6.6a with a flow hole 5.5a... drilled in the upper part.
Since the tank 4 and the saucer 6.6a are connected by the lift device 7, the cleaning liquid, etc. can be circulated and flowed down, and there is no need to spray out the cleaning liquid, etc. under high pressure, so there is no clogging, no wear, and no breakdown. It can be used permanently, after-sales work is easy, the lifting device 7 can be made simple and inexpensive, and because the pressure is low, a large amount of cleaning liquid can be circulated and flowed down, similar to when the workpiece is immersed. It is possible to obtain a deep dip effect, save space, and prevent the cleaning liquid from scattering.

Further, the lift device 7 has a screw shaft 1 inside the pipe body 8.
Since the pipe body 8 and the fins are provided internally, cleaning liquid and the like will not pass through the interior at high speed, thereby preventing wear of the pipe body 8, fins, etc.

In addition, a partition wall 1 is attached to a box body 15 with a conveyor 16 arranged on the upper part.
7 and installed the painting nozzle 20.20a,
A tank 21 is disposed at the bottom of the box 15, and a saucer 22 is disposed at the top along the partition wall 17, and the tank 21 and saucer 22 are connected by a lift device 23, so that the coating nozzle 2
A water curtain is installed in front of the 0.20a to collect the paint, making it possible to eliminate the need for conventional absorbent paper and reusing the paint.Also, since the water is of a flow-down type with overflow, the water is under high pressure. There is no need for this, and the lift device 23 can be made simple and inexpensive, and water can be prevented from scattering.

In addition, since the lift device 23 has a screw shaft 26 inside the pipe body 24, the cleaning liquid etc. does not pass through the inside at high speed, so it is possible to prevent wear of the pipe body 24, fins, etc. .

Further, a ventilation chamber 19 is provided behind the partition wall 17, and a fan 28 is provided, and flow holes 5.5a are provided diagonally in the ventilation chamber 9.
Since the guide plate 29 with a perforation is arranged and the water pipe 30 is arranged on the guide plate 29, the paint can be recovered and reused from the air mixed with paint, and clean air can be discharged. Its practical effects, such as being able to do so, are enormous.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is a sectional view of a processing tank, FIG. 2 is a plan view of a pretreatment device, and FIG. 3 is a sectional view of a coating booth. 1, la...processing tank 3 conveyor 4 tank 5.5
a... Flow hole 6.6a saucer 7 lift device 8 vibrator IO screw shaft] 4 painting booth 15 box 16 conveyor 17 bulkhead 19i! Air chamber 20.20a painting nozzle 21 tank 2
2 saucer 23 iJ% device 24 pipe body 26 screw shaft 28 fan 29 guide plate 30 water pipe or more

Claims (5)

[Claims] (1) A tank is placed at the bottom of a processing tank with a conveyor installed at the top, and a saucer with a drainage hole is placed at the top, and the tank and saucer are connected by a lift device. Pre-treatment equipment for painting. (2) The pretreatment device for painting according to claim 1, wherein the lifting device has a screw shaft installed inside the pipe body. (3) A partition wall is erected on a box with a conveyor on the top, and a painting nozzle is installed, a tank is placed on the bottom of the box, and a saucer is placed on the top along the bulkhead, and the tank and saucer are installed. A painting booth characterized by being connected by a lift device. (4) The painting booth according to claim 3, wherein the lift device has a screw shaft installed inside the pipe body. (5) A ventilation chamber is provided behind the partition wall, a fan is provided, and a guide plate with diagonal flow holes is placed in the ventilation chamber.
5. The paint booth according to claim 3, further comprising a water guide pipe arranged on the guide plate.