JPH0577264U - Drainage treatment tank - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent re-dispersion of liquid mist crystals and dust. [Structure] In a liquid draining treatment tank in which air is blown from a nozzle (15) to an object to be treated (25) suspended and held in a tank main body (10), liquid is disposed close to both inner side walls. An opening provided with a plurality of guides (31) and forming a downflow channel (34) between each guide plate (31) and the inner wall surface (11) and provided below the tank body (10). An exhaust device (30) communicating with (32) is provided to discharge liquid mist and the like removed from the object to be treated (25) to the outside through the downflow channel (34).

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a liquid draining treatment tank for draining liquid by blowing air onto an object to be processed.

[0002]

[Prior Art]

 Many of the various surface treatment devices are equipped with a so-called liquid drainage treatment tank using an air knife. A general conventional structure of such a liquid draining treatment tank is shown in FIG. In the figure, reference numeral 10 denotes a tank main body in which nozzles 15 and 15 for forming an air knife are arranged. Reference numeral 20 denotes a transfer frame, which holds and suspends an object to be processed 25 via a hanger 21, and is transferred by a crane or the like and placed on an upper frame support 22.

Therefore, by spraying the air from the nozzles 15 and 15 on the front and back surfaces of the processing target object 25 which is held down, the attached liquid can be easily and quickly drained. This is convenient because it does not damage the object to be processed 25. In order to further improve the liquid draining effect and the liquid draining speed, the amount of sprayed air or its flow velocity may be increased.

[0004]

[Problems to be solved by the device]

 However, the above conventional structure has the following problems. That is, the liquid mist removed from the object to be treated 25 adheres to the inner wall surfaces 11 and 11 and the bottom floor 12 and is dried and crystallized. In addition, dust that has entered from the outside also accumulates. On the other hand, the air discharged from the nozzles 15 and 15 flows in the tank body 10 and is finally discharged to the upper outside. Therefore, depending on the amount of air blown from the nozzles 15 and 15, the blowing speed, the form of the object to be processed 25, etc., adhered crystals and dust are scattered and adhere to the front and back surfaces of the object to be processed 25.

This adhesion may be recognized as a mere appearance deterioration depending on the object to be processed 25 or the subsequent processing. For example, when the printed wiring board (25) is subjected to electrodeposition resist processing, It is unacceptable as it will cause poor exposure and reduced resolution.

Therefore, conventionally, the nets 19 and 19 are attached as shown by the one-dot chain line in FIG. However, although the nets 19 and 19 are temporarily effective, they must be replaced frequently, which is expensive and time-consuming. Further, since the collection of the liquid mist is not perfect, crystals are still seen on both inner wall surfaces 11, 11. It also deposits on the floor bottom 12. Therefore, since these crystals and deposits are scattered again, it is difficult to say that this is a drastic measure in the case of the above electrodeposition resist treatment.

Thus, no matter how carefully pre- and post-treatments including the electrodeposition resist treatment are carried out, if fine crystals and dusts which are difficult to see are adhered in the liquid draining treatment, the quality may deteriorate. The yield is bad.

An object of the present invention is to provide a liquid-cutting treatment tank capable of completely preventing liquid mist crystals and dust from adhering to an object to be treated.

[0009]

[Means for Solving the Problems]

 The liquid draining treatment tank according to the present invention is a liquid draining treatment tank in which air is blown from a nozzle to an object to be processed that is suspended and held in the tank body, and the liquid draining treatment tank is close to both inner side walls of the tank body. A plurality of guide plates that descend and incline toward the wall surface are arranged, a downflow channel is formed between these guide plates and the inner wall surface, and the tanks are opened from the openings below both inner wall surfaces. It is characterized by the provision of an exhaust device for discharging the air inside the main body to the outside.

[0010]

[Action]

 In the present invention having the above-mentioned configuration, when air is blown from the nozzle, the processing liquid adhering to the surface of the object to be processed is drained, and the liquid mist flows with the air to both inner wall sides. Then, it is guided by the inclined guide plate and reaches the downflow channel formed between the guide plate and the inner wall surface. Then, since a downflow by the exhaust device is formed in the downflow passage, the downflow is discharged to the outside from the opening below the tank body. Therefore, the crystals due to the liquid mist stagnation do not deposit on the guide plate or the inner wall surface, so that re-scattering due to the crystals can be prevented. The same applies to dust that enters the tank body. Furthermore, since the air discharged from the nozzle becomes a flow for discharging liquid mist and re-scattered crystals and is discharged from the opening, backflow scattering from the upper part of the tank body to the frame cradle side can also be prevented.

[0011]

【Example】

 An embodiment of the present invention will be described below with reference to FIG. In FIG. 1, the tank main body 10 is one of a large number of tanks for subjecting the object to be processed 25 to the electrodeposition resist treatment, and is used in the draining process. The object to be processed 25 in this embodiment is a flat-plate-shaped printed wiring board, and is hung and held by the transport frame 20 via a hanger 21. By placing the transport frame 20 on the frame pedestal 22, it is suspended and held at a predetermined position in the tank body 10.

The nozzle 15 blows air for forming an air knife onto the suspended object 25 to be processed, and each nozzle 15, 15 is supplied with a predetermined pressure from a compressed air source (not shown). A flow of compressed air is supplied. Therefore, the processing liquid adhering to the front and back surfaces of the object to be processed 25 can be drained quickly and highly efficiently.

Here, a plurality of guide plates 31 that are inclined downward toward the inner wall surfaces 11, 11 are provided near both inner side walls of the tank body 10. These guide plates 31 are unitized on the left and right, and can be taken out of the tank and cleaned. The role of each guide plate 31 is to first guide the air flow containing the liquid mist removed from the object to be treated 25 to the inner wall surface 11 side without recirculating in the tank body 10, and secondly to the bottom floor 12. It is to prevent the upward flow of the air flow repelled from the side and redirect the air to the inner wall surface 11, and thirdly, to guide the dust entering from the upper part of the tank body 10 to the inner wall surface 11 side.

Downflow channels 34, 34 are formed between the guide plate 31 and the inner wall surfaces 11, 11. Therefore, the liquid mist and dust guided to the inner wall surface 11 side falls downward.

Moreover, the downflow channels 34, 34 are connected to the openings 32, 32 provided on the lower side of the tank body 10, and the exhaust device 30 forms a forced suction flow. Therefore, the liquid mist does not stay in each guide plate 31 or the inner wall surface 11 and crystallize. Also, no dust is deposited.

Next, the exhaust device 30 is composed of ducts 33, 33 surrounding the openings 32, 32 and an exhaust fan 35. In this embodiment, the transport frame 20 is mounted on the frame pedestal 22. It is formed so as to perform exhaust operation under the conditions. The discharge from the exhaust fan 35 is processed by an air purifier (not shown) arranged in a proper place, and is discharged to the atmosphere.

Further, in this embodiment, the bottom (12) of the tank is water-filled (W) in order to complete the prevention of re-scattering of crystals and dust. Therefore, liquid mist, crystals, or dust that has fallen directly from the object to be treated 25 or indirectly dropped from the inner wall surfaces 11 and 11 can be absorbed in water.

In the present embodiment having such a configuration, when the transport frame 20 is placed on the frame pedestal 22 and the workpiece 25 is suspended and held at a predetermined position, the exhaust fan 35 is driven. An inclined downflow is formed in each guide plate 31, and a downflow toward the opening 32 and the duct 33 is formed in the downflow passage 34.

Here, air is blown from the nozzles 15 and 15 to drain the front and back surfaces of the object 25 to be processed. The removed liquid mist flows toward the inner wall of the tank, passes through the guide plate 31 and descends in the down flow passage 34 to reach the opening 32. Then, it is discharged through the duct 33. The dust that has entered from above the tank body 10 is directly sucked into the downflow channel 34 side. Further, the liquid mist or the like flowing toward the bottom floor 12 is collected in the water filled with water.

Therefore, according to this embodiment, the plurality of guides 31 arranged close to both inner side walls are arranged, and the downflow channel 34 is formed between each guide plate 31 and the inner side wall 11. An exhaust device 30 that is formed and communicates with an opening 32 provided below the tank body 10 is provided, and the liquid mist removed from the object to be treated 25 is discharged to the outside through the downflow channel 34. Therefore, it is possible to prevent the liquid mist from adhering and stagnating on the inner wall surface 11 and crystallizing, and it is also possible to prevent the dust that has entered from above from accumulating. Therefore, it is possible to completely prevent the crystals and dust from directly and re-scattering to adhere to the object to be treated 25, and it is possible to produce a high quality product with a high yield and reduce the cost.

Further, since the left and right guide plates 31 are unitized, they can be easily cleaned by removing them from the tank body 10. Therefore, it is possible to efficiently guide the air to the downflow channel 34 efficiently.

Further, since the exhaust device 30 is driven under the condition that the carrier frame 20 is placed on the frame receiving base 22, no wasteful power consumption occurs.

Furthermore, since the bottom floor 12 is water-filled (W), dust and crystals that have dropped downward are collected in water. Therefore, re-scattering can be prevented more reliably.

Although the electrodeposition resist treatment has been disclosed, the present invention can be directly applied to a drainage treatment tank of another surface treatment apparatus such as electroplating.

[0025]

[Effect of the device]

 According to the present invention, a plurality of guides disposed close to both inner side walls are arranged, a downflow channel is formed between each guide plate and the inner wall surface, and an opening provided below the tank body. An exhaust device that communicates with the liquid mist is provided so that the liquid mist removed from the material to be processed is discharged to the outside through the downflow passage, so that the liquid mist does not adhere to the inner wall surface and stays crystallization. It is also possible to prevent dust that has entered from above from accumulating. Therefore, it is possible to completely prevent the crystals and dust from directly and re-scattering to adhere to the object to be processed, and it is possible to produce a high quality product with a high yield and reduce the cost.

[Brief description of drawings]

FIG. 1 is a diagram for explaining an embodiment of the present invention.

FIG. 2 is a diagram for explaining a conventional example.

[Explanation of symbols]

 10 Tank Main Body 11 Inner Wall Surface 12 Bottom Floor 15 Nozzle 20 Transport Frame 22 Frame Cradle 30 Exhaust Device 31 Guide Plate 32 Opening 33 Duct 34 Downflow Channel

Claims (1)

[Scope of utility model registration request] 1. A liquid-cutting treatment tank in which air is blown from a nozzle to a workpiece to be drooped and held in the tank main body to drain the liquid, in which both inner side walls of the tank main body are approached and descend toward the wall surface. A plurality of sloping guide plates are arranged, a downflow flow path is formed between these guide plates and the inner wall surface, and the air in the tank main body is discharged from the openings provided below both inner wall surfaces. A liquid draining treatment tank, which is provided with an exhaust device for discharging the liquid to.