JPS5935999B2 - Exhaust method and equipment for anodizing treatment equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an exhaust method and apparatus for an anodizing treatment apparatus.

In anodic oxidation equipment, which charges the electrodes in an electrolytic tank and the object to be processed, a large amount of toxic gas, mainly composed of hydrogen gas, generated from the electrolytic tank not only infects the working environment, but can also cause explosions. There is also a high risk of pollution, and if left unchecked, it will become a pollution problem.

Conventionally, toxic gases from an electrolytic cell were sucked in through a suction hood 2 provided on either side or one side of an electrolytic cell 1, as shown in FIG. 1, passed through an exhaust fan, treated with an exhaust gas cleaning device, and released into the atmosphere.

However, these conventional methods have poor suction efficiency and require large equipment because some toxic gases are scattered and a large amount of surrounding air is sucked in because the suction is carried out from the side of the electrolytic cell. There were drawbacks such as a large space being required between the processing tanks and the adjacent processing tanks arranged in rows, resulting in longer process lines.

The present invention overcomes the above-mentioned drawbacks of the prior art and provides a method and apparatus for reducing the intake of excess air and obtaining an efficient compact device by adapting to the situation of toxic gas generation. It is related to.

An embodiment of the present invention will be described below with reference to the drawings.

2 is a plan view, and FIG. 3 is a cross-sectional side view taken along the line A--A in FIG. 2.

In the drawing, 1 is an electrolytic cell, 2 is a suction hood, 3 is a cathode plate, and 4 is a suspension for hanging the cathode plate 3 in the electrolytic cell, which is installed on the upper surface of the wall of the electrolytic cell and has the suction hood 2 attached. A frame, 5 is an object to be processed, 6 is a transport frame for transporting the three objects to be processed and immersed in the electrolytic bath, T is an exhaust duct, 8 is an exhaust fan, 9 is an exhaust purifying device, 10 is the front tank, 11
is the latter tank.

In the anodizing treatment apparatus configured in this way,
The workpiece 5 to be electrolytically treated is suspended from a transport frame 6 and transported to the electrolytic bath 1 using a known crane or the like and immersed in the electrolytic bath 1.The workpiece 5 to be electrolytically treated is then transported to the electrolytic bath 1 using a known crane or the like and immersed therein. is connected, and the cathode of the power supply device is connected to the cathode plate 3 via a suspension frame installed in the electrolytic cell 1, so that when charged, a current flows through the specified electrolyte and the object to be treated is An oxide film is formed on the surface of the object 5.

Here, the chemical formula for the formation of the oxide film is 2Aι+3
It is expressed as H20→At2o3+3H2, and it is well known that hydrogen gas generated by this is generated from the vicinity of the cathode plate 3 and rises.

The present invention aims to provide an inlet for the generation of toxic gas such as hydrogen gas, in connection with the generation of hydrogen gas and the reinforced structure of the suspension frame of the cathode plate accompanying the recent increase in the size of aluminum sashes, etc. A suction hood is attached to a hanging frame as a method of installing it above the hot water area. In other words, the gas is sent to the suction hood 2
The air is sucked in, passed through an exhaust duct T and an exhaust fan 8, and then processed by an exhaust purifying device 9 and released into the atmosphere.

In this case, it is desirable that the suction hood 2 is provided with an air port 12 for sucking in a small amount of atmospheric air in order to prevent corrosion of the hanging frame 4 due to toxic gases.

In this way, the gas generated in the electrolytic cell 1 can be sucked in by the suction hood 2 of the hanging frame 4 located at the location where the gas is generated, and can be efficiently exhausted. Therefore, the method of the present invention is a method of discharging gas generated from an electrolytic cell by providing a suction port on the electrode or its hanging frame, so that exhaust gas with good suction efficiency can be achieved without sucking in excess air. can be done. In addition, the device of the present invention can reliably carry out the method of the present invention, has a simple structure because it does not require separate suction hood attachment mechanisms, and is less likely to break down. The effect it produces is extremely large.

[Brief explanation of drawings]

FIG. 1 is a conventional exhaust system, FIG. 2 is a plan view of the present invention, and FIG. 3 is a cross-sectional side view taken along the line A--A in FIG. 1: Electrolytic cell, 2: Suction hood, 3: Cathode plate, 4: Hanging frame, 5: Processed object, 6: Transport frame, T: Exhaust duct, 8: Exhaust fan, 9: Exhaust air cleaning device, 10: Front tank, 11: Back tank, 12: Air port.

Claims (1)

[Scope of Claims] 1. In an exhaust device for an anodizing treatment apparatus in which a cathode plate provided in an electrolytic cell and a workpiece immersed in the electrolytic cell are charged, an inlet for gas generated from the electrolytic cell is provided. 1. A method for exhausting an anodizing apparatus, characterized in that the electrode or its suspension frame is provided with the following: and then exhausted. 2. An anodizing treatment equipment comprising a cathode provided in an electrolytic cell or a suction hood attached to its hanging frame, an exhaust duct that leads gas from the suction hood to an exhaust fan, and optionally an exhaust purifying device. exhaust system.