JPH09143796A - Dip water washing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely remove the bubbles generated at the time of putting a work into a tank. SOLUTION: A liquid feed pipe 10 and suction pipe 19 are disposed on the outer side of the surface layers of the sidewalls 3, 4 of the dip water washing tank 1. Discharge nozzles 11 disposed at the front ends of the branch pipes 12 of the liquid feed pipe 10 are disposed to be directed toward a discharge tank. As a result, the bubbles of the work surface are removed by the washing water flowing in the direction reverse from the transporting direction of the work and are surely discharged toward the discharge tank 2 side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an immersion water washing apparatus for pretreatment in electrodeposition coating or for cleaning an object to be coated after electrodeposition coating.

[0002]

2. Description of the Related Art When electrodeposition coating is applied to an object to be coated such as a car body, the car body is washed with rinsing water as a pretreatment. Generally, the immersion rinsing device used for this is rinsing with water. A discharge nozzle for washing water is installed on one side of the tank,
The suction port for rinsing water is arranged on the other side.

However, in this type of immersion water washing device, bubbles generated at the time of entering the tank are removed from the surface of the work by the washing water discharged from the discharge nozzle and then discharged from the suction port provided on the other side. Since this water flow is in a direction orthogonal to the traveling direction of the work, it is difficult to discharge all of the bubbles out of the immersion washing tank. Therefore, there arises such a problem that it adheres to the electrode and adversely affects the subsequent electrodeposition coating or causes defective electrodeposition.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of such a problem.
It is an object of the present invention to provide a new immersion water washing device capable of reliably removing bubbles generated when entering a tank.

[0005]

Means for Solving the Problems That is, the present invention is, as an immersion water washing apparatus for achieving such a problem, in the vicinity of the surface layer portion of one side wall of the immersion water washing tank having a discharge tank on the inlet side, The discharge means for flushing water is disposed toward the discharge tank, and the suction means for flushing water is disposed near the surface layer portion of the other side wall.

[0006]

Embodiments of the present invention will be described below. FIG. 1 shows an immersion water washing apparatus according to an embodiment of the present invention. In the figure, reference numeral 1 indicates a work W conveyed by a conveyor 41, that is, a car body in this embodiment. An immersion washing tank for immersion and washing. The immersion washing tank 1 has an immersion washing tank 1 on the entry side thereof.
A discharge tank 2 is provided for discharging the wash water overflowing from inside.

Immersion washing tank 1 to form a superficial flow of washing water
As shown in FIG. 3, the pipelines provided on both sides of the surface layer of the liquid supply pipe 10 and the suction pipe 19 are connected via the pressure pump 17 and the filter 18 as shown in FIG. ,
Further, in the liquid supply pipe 10 connected to the filter 18 side,
Discharge nozzle 11 at the tip of a plurality of branch pipes 12 branched therefrom
Is provided from the side wall 3 toward the discharge tank 2, and the suction pipe 19 connected to the pressure feed pump 17 side has a plurality of branch pipes 14 branched from the suction port 13 at the tip of the other side wall 4. It has an opening.

A liquid supply pipe 1 is provided on the outlet side of the immersion water washing tank 1.
A distribution pipe 16 connected to 0 is arranged so as to cross both side walls 3 and 4, and a plurality of discharge nozzles 15 are provided toward the discharge tank 2 here.

Further, a liquid supply pipe 20 and a suction pipe 27 for stirring the washing water in the bath are provided outside the lower layer portion of the immersion water washing tank 1, and a liquid supply pipe 10 and a suction pipe 19 on the surface layer side. And the filter 2
The liquid supply pipe 20 connected to the 6 side is provided with a plurality of branch pipes 24 branching from the discharge nozzle 23 at the tip of the side pipe 4 from the other side wall 4 toward one side wall 3, and a pressure pump 25.
In the suction pipe 27 connected to the side, a plurality of branch pipes 22 branched from the suction pipe 21 are provided with suction ports 21 at one end of the side wall 3. In the figure, reference numeral 31 indicates a washing shower pipe provided at the inlet and the outlet of the submerged washing tank 1.

In the embodiment thus constructed, when the work W suspended and supported by the hanger 42 is fed into the submerged washing tank 1 by the conveyor 41, the work W is washed by the washing nozzle 31. And then immersed in the immersion washing tank 1.

The bubbles generated on the surface of the work W at this time are washed with water which is discharged toward the discharge tank 2 from the discharge nozzle 11 for forming a superficial flow provided in the surface layer portion of the immersion washing tank 1. That is, it is effectively removed by washing water discharged in the opposite direction to the transport direction, and then taken out to the discharge tank 2 side and discharged.

In the above-mentioned embodiment, the case of the pretreatment of the electrodeposition coating was explained, but it can be applied to the case of immersing the workpiece which has passed through the electrodeposition coating tank by immersing it in the rinsing water of the immersion rinsing tank. Is clear.

[0013]

As described above, according to the present invention, the discharge means for flushing water is disposed near the surface layer portion of one side wall of the immersion washing tank having the discharging tank on the inlet side, facing the discharging tank. In addition to the above, a suction means for rinsing water was installed near the surface layer on the other side wall, so bubbles generated on the surface when entering the tank can be effectively removed by the surface layer flow that flows in the opposite direction to the workpiece transfer direction. In addition, it is surely discharged to the discharge tank provided on the inlet side.

Further, a branch pipe is arranged in the vicinity of the surface layer portion on the outlet side of the immersion water washing tank so as to cross the immersion water washing tank, and a large number of means for discharging washing water are directed to the discharge tank on the branch pipe. Since they are arranged, the interaction between the washing water here and the washing water on the side wall further enhances the bubble collecting ability, and the bubbles adhering to the surface of the work can be reliably removed and discharged.

[Brief description of the drawings]

FIG. 1 is a plan view of an immersion washing apparatus according to an embodiment of the present invention.

FIG. 2 is a transverse sectional view of the same device.

FIG. 3 is a partially enlarged view of the same device.

[Explanation of symbols]

 1 Immersion Washing Tank 2 Discharging Tank 3 One Sidewall 4 Another Sidewall 11 Discharge Nozzle 13 Suction Port 15 Discharge Nozzle

Claims (2)

[Claims] 1. A means for discharging washing water is provided near the surface layer portion of one side wall of the immersion washing tank having a discharge tank on the inlet side, and the surface layer portion of the other side wall is arranged near the surface layer portion. An immersion water washing device characterized in that a suction means for washing water is provided in the vicinity. 2. A branch pipe is arranged in the vicinity of a surface layer portion on the outlet side of the immersion water washing tank so as to cross the immersion water washing tank, and a large number of means for discharging washing water is provided in the branch pipe in the discharge tank. The immersion water washing device according to claim 1, wherein the dipping water washing device is disposed facing toward.