JP2752633B2 - Surface treatment equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an improvement of a device for preventing mist and vapor leakage from a processing chamber in pretreatment for painting by an immersion method or the like.

(Prior art) Conventionally, a immersion method or a spray method is generally used for degreasing and film conversion treatment of a metal surface. Further, as this immersion method or spraying method, a method as disclosed in JP-A-62-33787 is also implemented. The case of the spraying method of the conventional surface treatment apparatus will be described with reference to FIG. 4 as an example.

When processing the surface-treated material 110 while passing it through the processing chamber 109, a trolley conveyor 101 on which the cantilever hanger 100 is hung is used, and the side of the cantilever hanger 100 is vertically mounted on the ceiling of the processing chamber 109. An opening groove 102 through which the arm passes is provided. A spray nozzle 111 is mounted in the processing chamber so as to surround a hanger on which the surface-treated material is loaded, and the heated processing liquid is sprayed from the many spray nozzle holes toward the surface-treated material. Therefore, mist, vapor, and the like of the processing liquid accumulate in the processing chamber 109 and try to exit the chamber through the opening groove 102 in the ceiling. If spilled out of the processing chamber, other equipment may be defective, such as condensation of the processing solution on a hanger outside the processing chamber, corrosion of the conveyor, or adverse effects on the current collector parts in the case of the electrodeposition coating line. An air outlet duct 103 and a fan 104 are provided at the upper part of the air outlet 102, and air is blown out from the air outlet 105 toward the opening groove 102 to prevent a flow of steam or the like to be outflow, and together with the steam or the like. A suction duct 106 having a suction port 108 for sucking air and the fan 107 are provided.

Although the spraying method has been described above as an example, even in the immersion method, the processing liquid in the liquid tank in the processing chamber is used after being heated, and the necessity of a countermeasure against steam generated from this is the same as in the case of the spraying method. And the steam shut-off device have the same configuration.

(Problems to be Solved by the Invention) As described above, in the past, an outlet and an inlet were provided in order to prevent harmful steam from leaking from the processing chamber, but the adjustment of the supply and exhaust of these is very delicate. However, if the blowing amount is large, the steam is pushed back downward, and if the blowing amount is small, the steam diffuses from the opening groove and leaks. Further, two fans and a duct are required for blowing and suction, which increases costs.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides a method for degreasing an object to be treated,
In order to carry out a surface treatment such as a film conversion treatment by an immersion method, while loading an object to be processed on a hanger suspended from a trolley conveyor arranged above and outside the processing chamber, and a processing chamber through which a vertical arm of the hanger passes. The upper wall is gradually lowered along the moving direction of the object to be processed, and is made horizontal and then gradually raised, and an upper wall opening groove through which the vertical arm of the hanger passes is formed on the upper wall. An exhaust duct having an exhaust opening outside the processing chamber is provided along the upper wall opening groove,
In a surface treatment device that passes through the treatment liquid tank and treats it, the plate material extends vertically downward from the side edge of the upper wall opening groove to form a skirt, and the lower end of the skirt portion in the horizontal part of the upper wall is immersed in the treatment liquid In the place where the lower end of the skirt portion is to be separated from the processing liquid surface, and where the object to be processed is going down to the horizontal portion and where it is going up from the horizontal portion,
By passing the partition plate to the side wall and the skirt portion of the processing chamber facing the skirt portion, joining the upper side of the partition plate to the upper wall, and immersing the lower side in the processing liquid, the front and rear partition plates, the skirt portion and The structure is characterized in that the side wall and the upper wall of the processing chamber surround the surface of the processing liquid and suppress the emission of vapor.

(Operation) At the point where the tip of the skirt portion of the upper wall opening groove is in the processing liquid, the evaporation from the processing liquid surface which is going to go out of the processing chamber is only from a small gap of the upper wall opening groove. Since this is small, it is easily sucked into the exhaust duct from the exhaust opening provided near the upper wall opening groove.

(Example) Hereinafter, an example of the present invention will be described with reference to the accompanying drawings.

1 to 3 show an embodiment of the present invention. FIG. 1 is a longitudinal sectional view showing the whole of an immersion surface treatment apparatus according to the present invention, and FIG. A line enlarged sectional view,
FIG. 3 is a view showing a state in which the front end of the skirt portion is separated from the liquid surface before and after the processing liquid tank.

In FIG. 1, a processing liquid tank 1 containing a processing liquid 6 is installed in a processing chamber 2, and an upper wall 16 forms a U-shaped pan bottom type.
A narrow portion between the upper wall 16 and the liquid surface 7 is a place where the object to be treated is immersed. In FIG. 2, an upper wall opening groove 14 is provided at a position where the vertical arm of the hanger 5 on which the object to be processed is loaded crosses the upper wall 16, and the upper wall opening groove 14 is directed downward from both side ends thereof. Vertical skirt portions 15, 15 are provided. The skirt portions 15, 15 are immersed in the processing liquid at the immersion place in the center of the processing chamber, and are separated from the liquid surface before and after the tank. ing. In addition, the upper wall 16 at two locations before and after the tip of the skirt portion 15 tries to separate from the processing liquid surface, has an upper wall opening groove 14.
The partition plates 19, 19 and 20, 20 are attached in a skirt shape with the upper wall opening groove 14 interposed between the upper and lower side walls 18, and the ends thereof are immersed in a processing solution to be processed in cooperation with the skirt portion 15. In some cases, it is configured to surround the liquid level at the center of the chamber.

An exhaust duct 11 extends along the upper wall 16 outside the processing chamber immediately above the upper wall 16, and the exhaust duct 11 extends along the upper wall opening groove 14 in order to suck the vapor flowing out of the upper wall opening groove 14. The exhaust opening 17 is provided in a slit shape. Further, inside two ducts separated from the skirt portions 15 and 15 and the liquid level 7 at the front and rear of the processing chamber, separate exhaust suction ports 8 and 8 are provided on a surface facing the exhaust opening 17. The suction ports 8, 8 are connected to the exhaust fan 3 through the exhaust suction port passages 12, 12.

Since the present invention is configured as described above, the processing chamber 2
The amount of harmful steam that accumulates on the ground is generally reduced. Also, in places where the skirt tip is separated from the processing liquid surface before and after the processing tank, the upper surface opening groove 14 evaporates from the entire surface of the liquid surface.
However, the exhaust fan 3 can be sucked in by the exhaust fan 3 because the exhaust suction ports 8 are provided in the exhaust duct 11.

As described above, the effect of the present invention is particularly remarkable in the dipping method, but is sufficiently effective in the spraying method. Also, if a trolley conveyor 4 having a small left and right swing is used, the upper wall opening groove 14 can be further narrowed,
It goes without saying that it is more effective.

(Effects of the Invention) As described above, the present invention has reduced the equipment cost for eliminating the need for the conventional blower fan and blower duct, and has eliminated the troublesome work of balancing supply and exhaust. In addition, adverse effects caused by the outflow of steam outside the processing chamber can be reliably prevented.

Further, since the partition plate is provided, the liquid surface at the center of the processing chamber is completely shut off in cooperation with the skirt portion, and vapor leakage evaporating from the liquid surface at this portion is infinite, which is more effective.

[Brief description of the drawings]

1 to 3 show one embodiment of the present invention.
FIG. 2 is a longitudinal sectional view showing the entire surface treatment apparatus of the immersion method according to the present invention. FIG. 2 is an enlarged sectional view taken along line AA of FIG. 1. FIG. FIG. 4 is an enlarged sectional view of a spray type showing a conventional example when the apparatus is separated from the apparatus. In the drawings, 1 is a processing liquid tank, 2 is a processing chamber, 3 is an exhaust fan, 4 is a trolley conveyor, 5 is a hanger, 6 is a processing liquid,
7 is the liquid level, 8 and 8 are the exhaust suction port, 9 is the overflow tank, 1
0 and 10 are partitions, 11 is an exhaust duct, 12 and 12 are exhaust suction passages, 13 is an exhaust passage, 14 is an upper wall opening groove, 15 and 15 are skirt portions, 16 is an upper wall, 17 is an exhaust opening, 18 is a side wall, 19 and 20 are partition plates, 100 is a cantilever hanger, 101 is a trolley conveyor, 10
2 is an opening groove, 103 is a blow duct, 104 is a blow fan, 105
Is an outlet, 106 is a suction duct, 107 is a suction fan, 108
Denotes a suction port, 109 denotes a processing chamber, 110 denotes a surface-treated product, and 111 denotes a spray nozzle.

──────────────────────────────────────────────────続 き Continuation of the front page (72) Susumu Yoshida, inventor of Daiki Co., Ltd. 2-6-1 Nishi Shinjuku, Shinjuku-ku, Tokyo (56) References JP-A-60-92499 (JP, A) JP-A Sho 62-33787 (JP, A) Japanese Utility Model Showa 58-34961 (JP, U) Japanese Patent Publication No. 55-39734 (JP, B2) (58) Fields investigated (Int. Cl. ⁶ , DB name) C23G 1/00 -5/04 C23C 22/73-22/86 C25D 13/00-13/24

Claims (2)

(57) [Claims] In order to carry out surface treatments such as degreasing and film conversion treatment of an object by an immersion method, the object is loaded on a hanger suspended from a trolley conveyor disposed outside the processing chamber. The upper wall of the processing chamber, through which the vertical arm of the hanger passes, is gradually lowered along the moving direction of the object to be processed, made horizontal, and then gradually raised.
An upper wall opening groove through which the vertical arm of the hanger passes is formed in the upper wall, an exhaust duct having an exhaust opening outside the processing chamber is provided along the upper wall opening groove, and passes through the processing liquid tank to perform processing. A plate material is vertically extended downward from a side end of the upper wall opening groove to form a skirt portion, and a lower end of the skirt portion in a horizontal portion of the upper wall is immersed in a processing liquid, and a lower end of the skirt portion is formed. At the place where the object to be processed is to be separated from the processing liquid surface, and where the object to be processed is to reach the horizontal part from the lowering and to the part to rise from the horizontal part, the partition plate is provided on the side wall and the skirt part of the processing chamber facing the skirt part. By joining the upper side of this partition plate to the upper wall and immersing the lower side in the processing liquid, the front and rear partition plates, the skirt, the side wall of the processing chamber, and the upper wall make the surface of the processing liquid It is possible to surround Surface treatment apparatus characterized by being configured to so that. 2. The exhaust duct is provided with an exhaust suction port separate from the slit-shaped exhaust opening, and the position of the exhaust suction port is set before and after the skirt of the object to be processed. 2. The surface treatment apparatus according to claim 1, wherein the front end is separated from the liquid surface of the processing liquid, and an exhaust fan is connected to the exhaust suction port through an exhaust suction passage.