JP2003147592A - High-speed barrel type surface treatment device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high-speed barrel surface treatment device which can perform the surface treatment at a high speed in a short time, in which an article to be treated is easily charged and taken out and which can reduce the pumping frequency of a treatment solution. SOLUTION: A basket-like barrel 5 with an upper side thereof opened is rotatably inserted in a treatment tank 2 which can assume two positions of the horizontal state and the tilted state, the treatment tank 2 is tilted together with the barrel 5, and a treatment solution spray nozzle 20 is inserted in the barrel 5 to spray the treatment solution on the article in the barrel 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high speed barrel type surface treatment apparatus for performing surface treatment in a short time in a barrel type surface treatment apparatus for accommodating a small object to be treated in a barrel for surface treatment such as plating. .

[0002]

2. Description of the Related Art Conventionally, in the case of surface-treating a small object to be treated such as a bolt, the object to be treated is housed in a cylindrical barrel or a polygonal cylindrical barrel which is placed sideways, A barrel-type surface treatment apparatus is often used in which a barrel containing an object to be treated is immersed and surface treatment is performed while rotating around a shaft. In such a barrel type surface treatment apparatus, it is difficult to increase the processing speed, and there is a problem that it is difficult to automate the loading and unloading of the object to be treated into the barrel. Further, when the barrel is moved to the next treatment tank, the treatment liquid inside the barrel cannot be discharged quickly, so if the treatment liquid is sufficiently discharged, the entire treatment time will be longer and the treatment liquid will not be discharged sufficiently. If it is moved as it is, there is a problem that the pumping out of the treatment liquid is increased, the treatment liquid is wasted, and the waste water treatment is burdened. Further, in the case of plating treatment, power is supplied to the object to be treated in the barrel through a lead wire on the rotating shaft of the barrel, which causes a problem of disconnection.

In order to solve these problems, a barrel that automatically opens and closes the lid for loading and unloading the object to be processed is used, or a basket-shaped barrel having an open upper surface is inclined and conveyed. Put the processed material into the barrel,
A barrel-type plating device that enables automated takeout was considered. However, since the processing liquid in the barrel is not replaced promptly, the processing speed cannot be increased, and the problem regarding pumping of the processing liquid has not yet been solved. Especially in the case of the plating process, which requires the longest time among various surface treatments, the movement of metal ions is carried out by the movement of the treatment liquid that moves through the through holes of the barrel, so the movement of metal ions is slow and the current is simply increased. However, there is a problem that the speed cannot be increased because the water is electrolyzed.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above problems and enables surface treatment such as plating in a short time and at high speed.
The object of the present invention is to provide a high-speed barrel type surface treatment apparatus which can easily automate the loading and unloading of the processing object and can reduce the pumping-out of the processing solution.

[0005]

The above problem can be solved by taking a basket-shaped barrel having an open upper surface and rotatably inserting the barrel into two positions, that is, a horizontal state and a tilted state together with the barrel. The high-speed barrel-type surface treatment apparatus of the present invention, which comprises the treatment tank thus configured and an injection nozzle that is inserted into the barrel when the treatment tank is tilted and injects the treatment liquid onto the object to be treated in the barrel. Alternatively, a basket-shaped barrel having an open upper surface, a processing tank in which the barrel is rotatably inserted so that the barrel can be placed in two positions, a horizontal state and a tilted state, and a tilting of the processing vessel. Sometimes it is inserted into the barrel and is composed of a spray nozzle for spraying the processing liquid onto the object to be processed in the barrel and a processing liquid tank for storing the processing liquid provided below the processing tank. Integrated with the treatment tank Overflow tank is formed and a processing solution outlet and an overflow outlet are provided under the processing tank and the overflow tank, respectively, and the processing solution discharged from the overflow outlet is returned to the processing solution tank. A first pump that supplies the processing liquid to the injection nozzle, and a second pump that transfers the processing liquid from the processing liquid outlet to the processing liquid tank.
Is provided so that the liquid feed amount of the first pump is larger than the liquid feed amount of the second pump. This can be solved by the high-speed barrel type surface treatment apparatus of the present invention.

Further, an anode is provided on the lower side of the inside of the treatment tank when tilted, and the anode is exposed on the inner surface of the bottom of the barrel to a plurality of current collectors independently provided so as to equally divide the outer circumference on the upper part of the barrel. The current-carrying electrodes are connected to each other and a current is passed between the anode and the current collector for plating, and an arc-shaped power supply bar that contacts the current collector when the barrel is inserted is provided above the processing tank. Shifting the center of the arc-shaped power supply bar in the circumferential direction from the center that is downward when the processing tank is tilted, providing an anode in the processing liquid injection nozzle, and providing a gear part on the outer periphery of the barrel. Provided, a drive mechanism that meshes with the gear part of the barrel to rotate the barrel at the top of the treatment tank, rotates the barrel after the treatment to shake off the treatment liquid, and further, a plurality of barrels, Treatment tank and treatment liquid injection A nozzle, a first pump, can be embodied by composed of a combination of the second pump, the single processing solution tank.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of a high-speed barrel type surface treatment apparatus of the present invention will be specifically described with reference to the drawings. FIG. 1 is a vertical side view when applied to a plating process, in which a rectangular box-shaped processing tank 2 is provided on a pedestal 1 so as to be able to tilt forward about a shaft 3, and the shaft 3 is a processing tank. 2, the processing tank 2 is driven by a tilting device (not shown) so as to assume either a horizontal position or a tilting position. The upper surface of the processing tank 2 is covered with an upper lid 4, and an insertion hole 6 for inserting the barrel 5 is provided at a position near the rear of the upper lid 4. A partition 7 is provided on the front side of the processing tank 2 to form an overflow tank 8,
An overflow outlet 9 is provided at the bottom of the overflow tank 8.
Is provided, and the processing liquid discharge port 11 is provided at the rear bottom of the partition wall 7.
Is provided. FIG. 3 shows a state in which the upper lid of the processing tank 2 is removed, and an anode 10 is installed behind the partition wall 7 so as to face the barrel 5 to be inserted. The anode 10 is preferably a frame body of insoluble metal to which an anode metal which is a plating metal is fixed. For example, in the case of galvanizing, it is preferable to fix a zinc plate to a frame body made of titanium.

The upper lid 4 has a motor 12 behind the insertion hole 6.
A gear 13 attached to the shaft of the motor 12 is provided so as to face the insertion hole 6, and an arc-shaped power supply bar 14 is provided along the edge of the insertion hole 6 so as to extend approximately half the circumference thereof. The center of the power feeding bar 14 in the circumferential direction is offset from the front center of the processing tank 2 in the rotation direction of the barrel, and the upper lid 4 is provided with a collector provided on the barrel 5 at a position facing the center of the power feeding bar 14 in the circumferential direction. A collector presser 16 for pressing the electrons 15 against the power supply bar 14 is provided. A barrel receiver 17 for supporting the bottom portion of the barrel 5 is provided on the bottom surface of the processing tank 2 below the center of the insertion hole 6, and an anode connection terminal 18 connected to the anode 10 is provided on the upper lid 4.
It is provided so as to project upward from. A column 19 is provided upright on the front end of the gantry 1, and a treatment liquid injection nozzle 20 is tiltably provided at the tip of the column 19. Reference numeral 21 denotes a processing tank receiver that supports the rear portion of the processing tank 2 when the processing tank 2 is in a horizontal posture.

The barrel 5 has a structure as shown in FIG. 6, and is formed by closing the bottom surface of an octagonal cylindrical barrel body 22 having an opening on the top surface, and an inclined portion 23 is provided on the outer periphery of the bottom surface. The engaging convex portion 24 is provided in the lower center of the bottom surface. Current collectors 15 and 15 are provided on the upper end of the barrel body 22 so as to divide the outer circumference equally. In the case shown in FIG. 6, one collector 1 is provided for each side of the octagonal barrel body 22.
5 and 15 are provided. Conducting bars 25, 25 are connected to the current collectors 15, 15, and the conducting bars 25, 25 extend downward in the wall of the barrel body 22 to expose the lower end portion to the inner surface of the inclined portion 23. The current-carrying electrodes 26, 26 are provided. Further, a gear 27 is provided on the upper peripheral edge of the barrel body 22, and a hanging fitting 28 is provided on the upper surface. Although not shown, the barrel body 22 is provided with a large number of through holes as in the conventional barrel.
It is arranged so that 5 is not exposed. The barrel main body 22 and the gear 27 are preferably made of synthetic resin such as polypropylene, and the current-carrying electrodes 26, 26 are preferably made of corrosion-resistant metal such as titanium.

FIG. 7 shows the flow of the processing liquid. A processing liquid tank 29 having a capacity capable of storing the entire amount of the processing liquid used in the processing tank 2 is provided at a position lower than the processing tank 2, and The treatment liquid to be used is stored in the treatment liquid tank 29 and is constantly filtered by a filter, a heat exchanger or the like attached thereto to keep the temperature constant. The processing liquid in the processing liquid tank 29 is supplied to the processing liquid injection nozzle 20 by the first pump 30, and the processing liquid in the processing tank 2 is supplied from the processing liquid discharge port 11 to the second pump 3
It is discharged by 1 and returned to the processing liquid tank 29. The amount of liquid sent from the first pump 30 is slightly larger than the amount of liquid sent from the second pump 31, and the excessive amount of the processing liquid in the processing tank 2 passes over the partition wall 7 and enters the overflow tank 8 to overflow. It returns to the processing liquid tank 29 from the discharge port 9.

FIG. 8 shows a preferred structure of the treatment liquid injection nozzle 20. A coil-shaped auxiliary anode support 33 made of an insoluble metal is provided on the inner surface of a cylindrical nozzle body 32, and the auxiliary anode support 33 is provided with the auxiliary anode support 33. A rod-shaped anode metal 34 is held so that the treatment liquid moves in the nozzle body 32 while being in contact with the auxiliary anode support 33 and the anode metal 34 and is ejected from the tip of the treatment liquid ejection nozzle 20. Is.

The high-speed barrel type surface treatment device configured as described above for performing the plating treatment is arranged next to the surface treatment device for performing pretreatment such as degreasing, pickling and electrolytic degreasing. Figure 1
When the treatment tank 2 shown in FIG. 2 is horizontal and the treatment liquid injection nozzle 20 is raised forward, and the barrel 5 after the pretreatment is put into the treatment tank 2 by inserting the object to be treated is inserted into the treatment tank 2 through the insertion hole 6, 4, the engaging convex portion 24 is supported by the barrel receiver 17, the gear portion 27 meshes with the gear 13, and the current collector 1
Since 5 contacts the power supply bar 14, the current collector 15 is pressed against the power supply bar 14 by moving the current collector retainer 16. Next, when the treatment tank 2 is tilted together with the barrel 5 and the treatment liquid jet nozzle 20 is tilted backward, the treatment liquid jet nozzle 20 is inserted into the barrel 5 as shown in FIG. Will be done.

When the first pump 30 and the second pump 31 are operated in this state, the processing liquid stored in the processing liquid tank 29 is injected into the barrel 5 from the processing liquid injection nozzle 20,
It enters into the processing tank 2 through the through hole of the barrel 5.
The processing liquid that has entered the processing tank 2 is discharged from the processing liquid discharge port 11 by the second pump 31 and returned to the processing liquid tank 29. However, the amount of the processing liquid supplied from the processing liquid injection nozzle 20 is the processing liquid. Since the amount of the liquid discharged from the discharge port 11 by the second pump 31 is slightly larger, the processing liquid is gradually accumulated in the processing tank 2 and eventually crosses the partition wall 7 into the overflow tank 8 to overflow. Returning from the discharge port 9 to the processing liquid tank 29, the liquid level of the processing liquid in the processing tank 2 is maintained at the height shown by the alternate long and short dash line in FIG.

If the motor 12 is rotated here, the gear 1
3, the barrel 5 is rotated via the gear portion 27, and the workpiece W has the inclined portion 2 located at the bottom of the inclined barrel 5.
3 to form a nodule, which is lifted in the rotation direction as the barrel rotates, and the upper part of the lifted nodule repeatedly collapses and falls, resulting in a position biased from the bottom of the barrel 5 in the rotation direction. Will be accumulated in. When a direct current power supply is connected between the anode connection terminal 18 and the power supply bar 14 and an electric current is applied, the metal ions eluted from the anode 10 into the treatment liquid will flow along with the treatment liquid, the treatment liquid discharge port 11, and the second pump. 31, the treatment liquid tank 29, the first pump 30, and the treatment liquid injection nozzle 20 reach the surface of the object W to be treated, and the particles W are deposited and plated on the object W to be treated.

The amount of the processing liquid in the processing tank 2 is sufficient to immerse the object W to be processed in the barrel 5, and the entire barrel 5 is not immersed in the processing liquid. The processing liquid sprayed from the spraying nozzle 20 into the barrel 5 can be easily moved from the barrel 5 into the processing bath 2, and the processing liquid is directly sprayed from the processing liquid spraying nozzle 20 onto the object W to be processed. It is possible to increase the circulation speed of the processing liquid around the processed material W, and it is possible to sufficiently supply the metal ions. Therefore, the plating rate can be increased by increasing the current density of the object W to be processed. Further, the auxiliary anode support 33 is provided in the treatment liquid injection nozzle 20.
If the anode metal 34 is provided and the auxiliary anode support 33 and the anode metal 34 are also energized, the metal ions eluted from the anode metal 34 will be immediately supplied to the object W to be treated, and the plating rate will be further increased. You can

During the plating as described above, the center of the feed bar 14 in the circumferential direction is displaced from the front center of the processing tank 2 in the rotation direction of the barrel, so that it is accumulated in the lower part of the barrel 5. Only the current collector 15 connected to the current-carrying electrode 26 with which the processed object W comes into contact comes into contact with the power supply bar 14, and the current-carrying electrode 26 not contacted with the object to be processed W is not connected to the power source. No useless plating is deposited on 26. Also, the collector 15,
The current-carrying bar 25 and the current-carrying electrode 26 are all fixed to the barrel 5 and are not broken.

When the first pump 30 is stopped after plating for a predetermined time, the treatment liquid in the treatment tank 2 becomes the second treatment liquid.
It is collected in the processing liquid tank 29 by the pump 31. If the processing tank 2 is tilted or returned to a horizontal state and the motor 12 is rotated and the barrel 5 is rotated, the processing liquid remaining in the barrel 5 and between the workpieces W is shaken off by the centrifugal force. . Next, the barrel 5 is taken out and transferred to the treatment tank of the next step through the water washing tank for post-treatment. When the barrel 5 is rotated while the treatment tank 2 is tilted, the treatment tank 2 is leveled. After returning to a proper state, the barrel 5 is taken out.
At this time, the treatment liquid remaining in the barrel 5 and between the objects to be treated W has been shaken off by the centrifugal force, and the amount of the treatment liquid pumped out is extremely small, so that the treatment liquid is not wasted and the plating is performed. There is also an advantage that the amount of washing water can be small in the subsequent washing step.

Although the mechanism for rotating the barrel 5 is provided on the processing tank 2 in the above-mentioned embodiment, it may be provided on the gantry 1 or any other place, and when the barrel 5 is transported. , The hook of the carrier is engaged with the hanging metal fitting 28 provided on the upper portion of the barrel 5 to lift it.
If the barrel 5 is rotated by the motor 12 so that the direction of the suspending metal fitting 28 is adjusted, it is possible to carry by the automatic carrier. Moreover, since the upper surface of the barrel 5 is open, the loading and unloading of the object to be processed can be easily automated. Furthermore, when a plating line is constructed using the high-speed barrel type surface treatment device of the present invention, the production amount can be increased simply by adding the high-speed barrel type surface treatment device of the present invention used for plating treatment. ,
In that case, there is an advantage that the treatment liquid tank 29 can be shared, and if the treatment liquid tank 29 is shared, the treatment liquid used for the plating treatment is the same in all the high-speed barrel type surface treatment devices, and therefore the quality is high. There is also an advantage that there is no variation.

Although the above description is applied to the plating process, the case of performing a process involving electrolysis such as electrolytic degreasing and electrolytic pickling is the same as the plating process, and degreasing without electrolysis is performed. In the case of performing a treatment such as washing with hot water, the same constitution can be adopted except that the anode is not provided.

[0020]

According to the present invention described above, since the metal ions can be sufficiently supplied, the plating speed can be increased by increasing the current density of the object W to be processed, and the upper surface of the barrel is opened. Therefore, it is easy to automate the loading and unloading of the material to be processed, and the plating solution can be shaken off by centrifugal force after plating, so the pumping out volume of the processing solution can be reduced and all the conventional problems are solved. It is extremely large that it contributes to the industry as providing such a high-speed barrel type surface treatment device.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a state in which a barrel according to an embodiment of the present invention is not inserted.

FIG. 2 is a plan view showing a state in which the barrel according to the embodiment of the present invention is not inserted.

FIG. 3 is a plan view showing a state in which an upper lid is removed.

FIG. 4 is a vertical sectional view showing a state in which a barrel is inserted.

FIG. 5 is a vertical cross-sectional view showing a state in which the processing tank is tilted.

FIG. 6 is a plan view and a sectional view of the barrel.

FIG. 7 is a conceptual diagram showing a flow of a processing liquid.

FIG. 8 is a cross-sectional view of a treatment liquid injection nozzle.

[Explanation of symbols] 1 stand 2 processing tanks 3 axes 4 Upper lid 5 barrels 6 insertion holes 7 partition 8 overflow tank 9 Overflow outlet 10 Anode 11 Processing liquid outlet 12 motors 13 gears 14 Power supply bar 15 Shu Denshi 16 Electronically controlled 17 barrel receiver 18 Anode connection terminal 19 props 20 Treatment liquid injection nozzle 21 Processing tank receiver 22 Barrel body 23 Inclined part 24 Engagement protrusion 25 energizing bar 26 energizing electrodes 27 Gear 28 Hanging bracket 29 Processing liquid tank 30 First pump 31 Second pump 32 nozzle body 33 Auxiliary anode support 34 Anode metal

Continued front page    (72) Inventor Tadayuki Date             1-8 Takahashi, Oguchi-cho, Niwa-gun, Aichi             Aoyama Seisakusho Oguchi Factory (72) Inventor Kiyoshi Nagai             1-8 Takahashi, Oguchi-cho, Niwa-gun, Aichi             Aoyama Seisakusho Oguchi Factory (72) Inventor Satoshi Morito             1-8 Takahashi, Oguchi-cho, Niwa-gun, Aichi             Aoyama Seisakusho Oguchi Factory

Claims (8)

[Claims] 1. A basket-shaped barrel having an open upper surface, a processing tank in which the barrel is rotatably inserted so that the barrel can take two positions, a horizontal state and a tilted state, and a processing vessel. A high-speed barrel type surface treatment apparatus comprising: a jet nozzle which is inserted into the barrel when it is tilted, and jets a treatment liquid onto an object to be treated in the barrel. 2. A basket-shaped barrel having an open upper surface, a processing tank in which the barrel is rotatably inserted so that the barrel can take two positions, a horizontal state and a tilted state, and a processing vessel. When the processing tank is tilted, it is composed of an injection nozzle that is inserted into the barrel when the processing tank is tilted and sprays the processing liquid to the object to be processed in the barrel, and a processing liquid tank that is provided below the processing tank that stores the processing liquid. An overflow tank is formed integrally with the processing tank on the lower side surface, and a processing liquid discharge port and an overflow discharge port are provided at the lower part of the processing tank and the overflow tank, respectively.
The first pump that supplies the processing liquid to the processing liquid injection nozzle from the processing liquid tank by returning the processing liquid discharged from the overflow outlet to the processing liquid tank, and the processing liquid from the processing liquid outlet to the processing liquid tank A high-speed barrel type surface treatment apparatus, wherein a second pump for transferring is provided and the liquid feed amount of the first pump is made larger than the liquid feed amount of the second pump. 3. An anode is provided on the lower side of the inside of the processing tank when tilted, and the anode is exposed on the inner surface of the bottom of the barrel to a plurality of current collectors independently provided so as to equally divide the outer circumference on the upper part of the barrel. The high-speed barrel type surface treatment apparatus according to claim 1 or 2, wherein the current-carrying electrodes provided as above are connected to each other, and an electric current is passed between the anode and the current collector for the plating treatment. 4. An arc-shaped power supply bar that contacts the current collector when the barrel is inserted is provided in the upper part of the processing tank, and the center of the arc-shaped power supply bar in the circumferential direction is located below the center when the processing tank is tilted. 4. The high-speed barrel type surface treatment device according to claim 3, wherein the high-speed barrel type surface treatment device is shifted in the rotation direction. 5. The high-speed barrel type surface treatment apparatus according to claim 1, wherein an anode is provided in the treatment liquid injection nozzle. 6. A gear mechanism is provided on the outer periphery of the barrel, and a drive mechanism for engaging with the gear mechanism of the barrel and rotating the barrel is provided on the upper part of the processing tank. The described high-speed barrel type surface treatment device. 7. The high-speed barrel type surface treatment apparatus according to claim 1, wherein after completion of the treatment, the barrel is rotated to shake off the treatment liquid. 8. A combination of a plurality of barrels, a processing tank, a processing liquid injection nozzle, a first pump and a second pump, and a single processing liquid tank. The high-speed barrel type surface treatment device according to any one of claims 2 to 7.