JPS634464B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a painting pretreatment device, and particularly to improvements in its water supply system.

When painting objects to be painted, such as automobile white bodies and frames, the surface of the object is usually cleaned before painting, and phosphates are used to improve the corrosion resistance of the painted surface and the adhesion of the paint film. A chemical conversion treatment is performed by, for example, the following steps.

Preliminary degreasing → Main degreasing → 1st washing → 2nd washing → 3rd
Washing→Surface conditioning→Chemical treatment→Fourth washing→Fifth washing→Sixth washing The pre-painting treatment is carried out by, for example, an apparatus as shown in FIG.

In Fig. 1, 10 is a preliminary degreasing booth, 20
30 is the first washing dip tank, 40 is the second washing booth, 50 is the third washing booth, 60 is the surface conditioning booth, 70 is the chemical cleaning treatment dip tank, and 80 is the fourth washing dip tank. , 90 is a fifth washing booth, and 100 is a sixth washing booth.
1 is a conveyor that runs above the booth and the dip tank, and from the conveyor 1 there is a hanger 2.
An object to be treated, for example, an automobile body 3 is placed on the hanger 2 and is moved from the preliminary degreasing booth 10 to the sixth washing booth 100. 4
is a partition wall that separates each booth. The preliminary degreasing booth 10 is equipped with a degreasing liquid storage tank 11, and the degreasing liquid in the storage tank 11 is sent to a spray riser 13 by a pump 12, and after being sprayed onto the object to be treated 3, is collected in the storage tank 11 and used for circulation. The main degreasing and chemical conversion treatments are carried out in full-deep tanks 20 and 70, respectively, in order to perform each treatment sufficiently for rust prevention. Also, the first water washing immediately after main degreasing and the fourth washing immediately after chemical conversion treatment.
Washing with water is also carried out in full-deep tanks 30 and 80, respectively, to ensure sufficient washing. Second washing booth 40, third washing booth 50, fifth washing booth 90
And the sixth washing booth 100 is equipped with washing water storage tanks 41, 51, 91 and 101, respectively.

In the above device, water is supplied to each washing booth and washing dip tank through a water supply system A to the first washing dip tank 30, the second washing booth 40, and the third washing booth 50, the fourth washing dip tank 80, and the fifth washing booth. 90 and the water supply system B to the sixth washing booth 100, and in each system, washing water is sent from the rear stage to the front stage.

That is, in the case of water supply system A, fresh water is sent from the water supply port 52 to the spray riser 53 of the third washing booth 50, is sprayed onto the object 3, and then is collected in the storage tank 51. The washing water in the storage tank 51 is sent to the storage tank 41 through the communication pipe 54, and the washing water in the storage tank 41 is sent to the second washing booth 40 by the pump 42.
After being sent to the spray riser 43 and sprayed onto the object 3 to be treated, it is collected in the storage tank 41 and used for circulation. Further, the washing water in the storage tank 41 is sent to the spray riser 31 above the first washing dip tank 30 by a pump 44, and after being sprayed, it is collected in the first washing dip tank 30. The wash water in the first wash dip tank 30 is sent to the drainage system through an overflow pipe 32.

In water supply system B, as in the case of water supply system A, fresh water is first sent from the water supply port 102 to the sixth washing booth 100, and then sequentially sent to the preceding fifth washing booth 90 and the fourth washing dip tank 80. .

Note that there is a case where the seventh flush booth 106 is provided after the sixth flush booth 100, and in that case, fresh water from the water supply port 107 is supplied to the spray riser 108.
After being sprayed, it is sent to the storage tank 101 via piping 109.

However, in the water supply of the (A) system and (B) system, the amount of water sent from the second washing booth 40 to the first washing dip tank 30 and the amount of water sent from the fifth washing booth 90 to the fourth washing dip tank 80, respectively. The amount of water is low. This is mainly because the spray riser becomes clogged due to contaminants in the wash water. Therefore, water is constantly injected into the first washing dip tank 30 and the fourth washing dip tank 80 from the water supply port 5 through the pipes 33 and 83, respectively. As a result, water consumption has become extremely high, and the amount of water constantly supplied to the first washing dip tank 30 and the fourth washing dip tank 80 remains constant due to reasons such as unstable water pressure in the main pipe and clogging of the spray riser. Otherwise, problems arise such as the dip tanks 30 and 80 not being filled with wash water when necessary.

SUMMARY OF THE INVENTION In view of the above-mentioned points, the present invention provides a coating pretreatment device that can supply a sufficient amount of water and stably supply washing water.

That is, the present invention includes a degreasing device, a first water washing device,
In a painting pretreatment device in which a chemical conversion treatment device and a second water washing device are connected in this order, each of the first water washing device and the second water washing device is composed of a plurality of water washing devices, and at least the first stage thereof is a dip tank. , the washing water stored in the first buffer tank is supplied in a constant quantity to the last stage of the first washing device and the last stage of the second washing device, respectively, and the washing water supplied to the last stage of the first and second washing devices is sequentially The present invention relates to a coating pretreatment device which is configured to be sent to the first stage and supplied in a fixed amount to the first stage dip tank from the second stage via a second buffer tank and a third buffer tank, respectively.

Next, the apparatus of the present invention will be explained based on the drawings.

FIG. 2 is a schematic explanatory diagram showing an embodiment of the apparatus of the present invention. Note that in FIG. 2, the same reference numerals as in FIG. 1 indicate the same members as in FIG.

In the apparatus shown in FIG. 2, as in FIG. A processing dip tank 70, a fourth washing dip tank 80, a fifth washing booth 90, and a sixth washing booth 100 are connected in this order, the preliminary degreasing booth 10 is equipped with a degreasing liquid storage tank 11, the second washing booth 40, The third washing booth 50, the fifth washing booth 90 and the sixth washing booth 100 each have washing water storage tanks 41 and 5.
1, 91 and 101. Processed object 3
is placed on a hanger 2 hanging down from the conveyor 1 using a tact method, and is moved from the preliminary degreasing booth 10 to the sixth washing booth 100, undergoing various treatments along the way.

Water is supplied to each washing dip tank and washing booth as follows.

Fresh water from the water supply port 110 is first stored in a first buffer tank 111. The buffer tank is equipped with a sterilization device to prevent the generation of microorganisms. The water stored in the buffer tank 111 is pumped through pumps 112 and 1, respectively.
At step 13, water is supplied to the storage tank 51 and the storage tank 101. Note that this water pipe is arranged near the suction ports of the pumps of the storage tanks 51 and 101.

The fresh water sent to the storage tank 51 is sent to the spray riser 53 of the third washing booth by the pump 55, and is sprayed onto the object 3 to be treated, and then collected into the storage tank 51. The cleaning water in the storage tank 51 is sent to the storage tank 41 of the second washing booth 40 through the communication pipe 54, and the washing water in the storage tank 41 is sent to the spray riser 43 of the second washing booth 40 by the pump 42, and the object to be treated 3 is sent to the spray riser 43 of the second washing booth 40. After being sprayed on water, it is collected in a storage tank 41 and used for circulation. Also, the cleaning water in the storage tank 41 is transferred to the second buffer tank 11 through an overflow pipe 114.
It can be accumulated to 5. The washing water stored in the buffer tank 115 is supplied to the first washing dip tank 30 through a pipe 117 by a pump 116. 1st
The wash water in the wash dip tank 30 is sent to the drainage system through an overflow pipe 32.

On the other hand, fresh water sent to the storage tank 101 is supplied to the pump 10.
5, it is sent to the spray riser 103 of the sixth flush booth 100, and after being sprayed onto the object 3 to be treated, it is collected in the storage tank 101. The cleaning water in the storage tank 101 is sent to the storage tank 91 of the fifth washing booth 90 through the communication pipe 104, and the washing water in the storage tank 91 is sent to the spray riser 93 of the fifth washing booth 90 by the pump 92, and the object to be treated 3 is sent to the spray riser 93 of the fifth washing booth 90. After being sprayed on water, it is collected in a storage tank 91 and used for circulation. Also storage tank 9
1 is stored in a third buffer tank 119 through an overflow pipe 118. The cleaning water stored in the third buffer tank 119 is pumped to the pump 1.
20 and is supplied to the fourth washing dip tank 80 through piping 121. The washing water in the fourth washing dip tank 80 is sent to the drainage system through an overflow pipe 82.

In addition, when the seventh flush booth 106 is provided after the sixth flush booth 100, fresh water from the water supply port 107 is sent to the spray riser 108, and after being sprayed, it is sent to the storage tank 101 through the piping 109.

Water is supplied from the first buffer tank 111 to the storage tank 51 and the storage tank 101 by pumps 112 and 113, respectively, in conjunction with the movement of the object 3.
For example, the system is configured to supply a fixed amount of workpieces only when they arrive at each booth. Also, water is supplied from the second buffer tank 115 to the first washing dip tank 30 and from the third buffer tank 119 to the fourth washing dip tank 80 by pumps 116 and 120, respectively, in fixed amounts in conjunction with the movement of the objects to be treated. configured to supply. The amount of water to be supplied can be determined from the amount of liquid carried in and taken out by the object to be treated, the amount that overflows when the object to be treated enters the tank, and the quality of water. The quantitative supply to each of the booths and the dip tank can be carried out by detecting the progress of the material to be treated using a limit switch or the like, and operating the water supply pump accordingly.

Therefore, in the device of the present invention, fresh water is temporarily stored in the first buffer tank 111, and a fixed amount is supplied to the storage tank 51 and the storage tank 101, respectively.
The water is supplied from these booths 50 and 100 to the front stage, and the water is supplied to the first washing dip tank 30 and the fourth washing dip tank 80 by temporarily storing the washing water from the washing booth in the latter stage in the second buffer tank 115 and the third buffer tank 119, respectively. Because it supplies a fixed amount of water, unlike the device shown in Figure 1, a sufficient amount of water is ensured to be supplied to the washing dip tank, and there is no need to constantly supply water, which greatly reduces water consumption. This method is very advantageous because it saves money, and there is no fluctuation in the amount of water stored due to fluctuations in water pressure in the main pipe, and constant water washing can be performed at all times.

Although the apparatus of the present invention has been described above using a tact method as an example, it is of course applicable to a continuous method as well.

The degreasing process, surface conditioning process, chemical conversion treatment process, etc. may be performed in the same manner as conventional methods, and are not particularly limited.

[Brief explanation of the drawing]

Figure 1 is a schematic explanatory diagram of a conventional painting pretreatment device.
FIG. 2 is a schematic explanatory diagram showing an embodiment of the coating pretreatment apparatus of the present invention. (Main symbols in the drawing), 10: Preliminary degreasing booth,
20: Main degreasing dip tank, 30: First washing dip tank, 40: Second washing booth, 50: Third washing booth, 70: Chemical treatment dip tank, 80: Fourth washing dip tank, 90: Fifth washing booth , 100:
6th flush booth, 110: Water inlet, 111: 1st
Batsuhua tank, 115: 2nd Batsufua tank,
119: Third battle tank.

Claims (1)

[Claims] 1. In a painting pretreatment device in which a degreasing device, a first water washing device, a chemical conversion treatment device, and a second water washing device are connected in this order, each of the first water washing device and the second water washing device is composed of a plurality of water washing devices, and at least The first stage of these is a dip tank, and the washing water stored in the first buffer tank is supplied in a constant quantity to the last stage of the first water washing device and the last stage of the second water washing device, respectively. The painting pretreatment device is configured such that the cleaning water supplied to the stages is sequentially sent to the front stage, and a fixed amount is supplied to the dip tank at the front stage from the rear stage via a second buffer tank and a third buffer tank, respectively.