JPH0380876B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a chemical conversion coating treatment device, and more specifically, a tiltable conveyor is pivotally supported in a chemical conversion coating treatment tank to improve the agitation of the treated material and to take out the chemical solution. The present invention relates to a reduced chemical conversion coating treatment device.

[Prior Art] Conventionally, the treatment methods for lubrication treatment (formation of metal soap) after phosphate treatment are mainly (A) a treatment method in a barrel, (B) a treatment method in a basket, ( C) There are three methods of processing using a conveyor.

As shown in Figure 6, the in-barrel processing method (A) involves lining up treatment tanks for pre-treatments such as degreasing, water washing, and pickling, as well as lubrication treatment, and placing the objects to be treated in the barrel. The barrel is immersed and rotated to process the treatment layers one after another in order, and after the treatment, the object to be treated is taken out and the barrel is returned to its original position for circulation. Barrel movement is by automatic carrier or manual hoist. The disadvantage of this method is that the chemical solution adheres to the barrel and is carried out of the processing tank. As a result, when the barrel is returned to the pretreatment process, the lubricating liquid adheres to the barrel and is carried into the pretreatment process, reducing the life of the bath. Furthermore, if the lubrication treatment liquid contains expensive MoS ₂ , chemical costs will be particularly high. In order to eliminate this problem of carrying out the chemical solution, a mechanism is required to transfer the object to be treated from one barrel to another.

In the method (B) of processing in a basket, as shown in FIG. 7, the objects to be processed are placed in the basket and processed by vibrating up and down. Although this method does not take away the chemical solution, it has the disadvantage that the material to be treated is poorly stirred and the film is not uniformly applied.

The method of processing using a conveyor (C) is called the mesh method, as shown in Figure 8, where the object to be processed is placed on a conveyor belt made of nets or bars, and the conveyor moves. The object to be processed is sequentially submerged in a processing tank from pre-treatment to lubrication. This method has disadvantages such as poor agitation of the material to be treated, which prevents uniform coating, a large amount of chemical solution being brought in and taken out of the bath, shortening of bath life quickly, and a large amount of chemical solution being used. Furthermore, since the equipment is highly corroded, a pickling process cannot be included.

[Problems to be solved by the invention] The present invention has been made in view of the above-mentioned problems of conventional chemical conversion coating treatment equipment, and it is possible to form a uniform coating by sufficiently stirring the object to be treated, and It is an object of the present invention to provide a chemical conversion coating treatment device that hardly requires bringing in and out of chemical solutions, reduces chemical costs, and improves bath life.

[Means for solving problems]

The chemical conversion coating treatment apparatus of the present invention includes a chemical conversion coating treatment tank containing a treatment liquid, a drive pulley pivotally supported on the upper edge of the chemical conversion coating treatment layer, an end pulley that rotates around the drive pulley, and a drive pulley. a conveyor consisting of a liquid-permeable belt that is hung on the end pulley and immerses the object to be processed in the processing liquid; a side plate that holds both sides of the conveyor so that the conveyor can be driven; a dispensing prevention part that functions to prevent the processed material from discharging to the outside by the processing liquid;
It is an object of the present invention to provide a chemical conversion coating treatment apparatus equipped with a tilting means for tilting the conveyor.

[Effect]

Initially, the objects to be processed loaded on the belt of the conveyor are immersed in the processing liquid by the tilting means of the present invention. Then, the belt is driven by the drive pulley.
By being driven, the objects to be processed are agitated, but the side plates and the dispensing prevention section prevent the objects to be processed from being discharged from the conveyor.

After the processing of the objects to be processed is completed, the conveyor is tilted by the tilting means, and the objects to be processed on the conveyor are discharged from the belt.

[Example] A preferred example of the present invention will be described based on the drawings.

FIG. 1 is a side view of one embodiment of the present invention. In FIG. 1, a chemical conversion coating treatment tank 1 is filled with a lubricating liquid, which is a treatment liquid, and a drive pulley 22 of a conveyor 2 is pivotally supported at the upper edge of one end of the chemical conversion coating treatment layer. The conveyor 2 is sandwiched between side plates 24 on both sides so that the conveyor 2 can be driven, and the end pulley 26 of the conveyor 2
At the same time, the drive pulley 22 is configured to rotate around the drive pulley 22 as a fulcrum. The belt 28 is stretched in a dish shape between the drive pulley 22 and the end pulley 26, with the drive pulley 22 side having a gentle slope 28a and the end pulley 26 side having a steep slope 28b serving as a release prevention part. A motor 3 is installed on the side surface of the chemical conversion coating treatment tank 1 , and a belt or chain 32 is hung between the motor 3 and the drive pulley 22 to drive the drive pulley 22 . Also,
One end of an air cylinder or hydraulic cylinder (hereinafter simply referred to as cylinder) 5 is pivotally attached to the side surface of the chemical conversion coating treatment tank 1 as a means for tilting the conveyor 2, and the tip of a piston rod 52 of this cylinder 5 is attached to the side plate 24. There is. A barrel 7 for pre-processing and supplying the object to be processed is movable above the conveyor 2. Also, drive pulley 2
2, there is a discharge conveyor 6 for carrying out the material to be processed.
is installed.

The operation of the chemical conversion coating treatment apparatus of this embodiment configured as above will be explained. As shown in FIG. 1, various positions are shown in which the conveyor 2 is tilted by operating the cylinder 5. Position A is a processing position where the conveyor 2 is immersed in the lubricant liquid, and position B is a processing position where it is lifted out of the lubricant liquid. The liquid draining position, C position, is a position for discharging the object to be processed. The operation at each position will be explained based on Fig. 2 A, B, and C.

FIG. 2A shows a side view of the processing position, FIG. 2B shows a liquid draining position, and FIG. 2C shows a side view of the dispensing position. First, the conveyor 2 is in the liquid draining position shown in FIG. Next, the piston rod 52 of the cylinder 5 is retracted, the conveyor 2 is rotated about the drive pulley 22, and the end pulley 2
6 is lowered, and the belt 28 is immersed in the lubricant liquid in the chemical conversion coating treatment tank 1 as shown in FIG. At the same time, the motor 3 drives the drive pulley 22 and rotates counterclockwise so that the upper belt 28 rotates from the drive pulley 22 to the end pulley 26. As the belt 28 rotates, the object 8 to be treated is moved along the belt 28 toward the end pulley, but since the end pulley side has a steep slope 28b, the object 8 is pushed back and moved to the chemical conversion coating treatment tank 1. The object to be treated 8 is appropriately agitated in the lubricant liquid 10 without flying out, and a uniform film is formed.

When the chemical conversion coating treatment of the object to be treated 8 is completed, the second
As shown in Figure B, the piston rod 52 of the cylinder 5 is pushed out, and the conveyor 2 is
2 and lifts the belt 28 above the liquid level. At this position, the drive pulley 22 is rotated by the motor 3 in the same direction as before, and while the workpiece 8 is being rotated on the belt 28, the workpiece 8 is rotated by the motor 3.
Drain off any excess liquid that has adhered to it.

After draining the object 8, as shown in FIG.
Tilt it towards the side. At this position, move the drive pulley 22 in the opposite direction to that used during processing, that is, the belt 2
The motor 3 is reversed so that the motor 8 moves toward the drive pulley 22, and the drive pulley 22 is rotated clockwise. As a result, the object to be processed on the belt 28 is carried by the belt 28, moves on the gentle slope 28a on the drive pulley side, and is discharged onto the discharge conveyor 6.

In addition, to explain the structure and operation of the barrel 7, the barrel 7 carries the workpiece 8 on the conveyor 2.
The barrel 7 has a lid that automatically opens and closes, or one without a lid is usually used. In either case, the barrel 7 stops on the conveyor 2 and rotates in the opposite direction to the normal direction, so that the object to be processed 8 is discharged.

The barrel with an automatic opening/closing lid is shown in Figure 3 A, B, C,
Figure 2 shows its configuration and operation. The lid 9 of the barrel 7 and the lever 10 are integrated, and the lid 9 is placed inside the side of the barrel 7.
is equipped with an outer lever 10. This lid 9 is hinged and can be opened and closed freely. The cam 11 is attached to the outside of the side of the barrel 7 and is fixed and does not move. The object to be processed 8 is placed in the state shown in FIG. 3A. During processing, the third
As shown in Figure B, when the barrel 7 is rotated clockwise, the object 8 is placed on top of the lid 9 and
is closed and rotates. When discharging the object 8, the barrel 7 is rotated in the opposite direction as shown in FIG. 3C. Therefore, the lever 10 hits the cam 11, the lid 9 is opened, and the workpiece 8 is discharged from the open lid 9 onto the conveyor 2 of the present invention, as shown in FIG. 3D.

The operation of the structure of the lidless type barrel is shown in Fig. 4 A, B, and C. This type of barrel is commonly called the dendenmushi type, and the cross section of the barrel is shaped like the shell of a dendenmushi. The object 8 to be processed is put in the state shown in FIG. 4A, and rotated clockwise during processing as shown in FIG. 4B. The object to be processed 8 is discharged by rotating counterclockwise in the opposite direction to that during processing.
The object to be processed 8 is discharged.

Incidentally, an example of a moving device for the barrel 7 is shown in FIG. The movement of the barrel 7 is carried out by a traveling carrier 44 running on a rail 42 installed on a pillar 40 of a building;
Traversing carrier 4 moving above traveling carrier 44
6. Also, the barrel 7 is connected to the frame 12.
There is a gear 18 around the body of the barrel 7, and a gear 13 coaxial with the gear 17 that meshes with the gear 18 is attached to the frame 12.
This frame is suspended from the traversing carrier by an elevator (not shown). barrel 7
, the gear 13 attached to the frame 12 meshes with the chain 14 of the transverse carrier, and the chain 14 is connected to the gear motor 1 via the sprocket 16.
5 rotations are transmitted.

[Advantages of the Embodiment] In this embodiment, the barrel 7 is made movable above the conveyor 2, the workpiece 8 is supplied to the conveyor 2, and a discharge conveyor is installed directly below the drive pulley 22 on the discharge side of the workpiece 8. 6 is installed, the flow from the pretreatment process of the object to be treated 8 is very smooth. Note that the carrier sequentially immerses the barrel 7 containing the workpiece 8 into the processing tank of the pretreatment process while rotating it, and supplies the workpiece 8 onto the conveyor 2, as well as the above-described actual implementation. A series of operations of the example device are all performed by a sequence controller, which stores the initially set movement and repeats the same movement every cycle. In addition, in the operation of the apparatus of this embodiment, it is also possible to move the conveyor 2 intermittently, and by changing the time, speed, and intermittent cycle, the object to be treated 8 can be appropriately agitated to form an optimal film. can be done. conveyor 2
The position where the object to be processed 8 is received is not limited to the liquid draining position, and the object to be processed 8 is received at another position.
I don't mind receiving it.

〔Effect of the invention〕

By employing the chemical conversion coating treatment apparatus of the present invention, it is possible to reduce the amount of chemical liquid carried in from the pretreatment process and carried out from the chemical conversion coating treatment tank, thereby extending the bath life. At the same time, it was also possible to prevent pollution by reducing the outflow of chemicals.

Further, since the dispensing prevention part was provided, by driving the belt, the object to be treated could be sufficiently stirred in the treatment liquid, and a uniform chemical conversion film could be obtained.

[Brief explanation of drawings]

Fig. 1 is a side view of one embodiment of the present invention, Fig. 2 A, B, and C are side views explaining the operation of the embodiment of Fig. 1, and Fig. 3 A, B, C, and D are views of the lid. Side sectional view showing the structure and operation of the automatic opening/closing type barrel, Figure 4 A,
B and C are side sectional views showing the structure and operation of a lidless type barrel, Fig. 5 is a side view of a barrel conveying device, and Figs. 6, 7, and 8 are side views showing conventional examples. be. 1... Chemical film treatment tank, 2... Conveyor, 22
... Conveyor drive pulley, 24 ... Side plate,
26... Conveyor end pulley, 28... Belt, 5... Cylinder, 7... Barrel.

[Claims]

1 Steel, zinc, and zinc alloy plated steel materials are pre-treated with 1 to 50 ppm of titanium ions and 200 to 200 ppm of phosphate ions.
3000ppm, pyrophosphate ion 50-600ppm, treated with a surface conditioner aqueous solution at 40℃ or less with pH 8.0-9.5, and then zinc ion 0.5% in the presence of an oxidizing agent such as nitrite ion or chlorate ion. g/ or more and less than 1.5 g/, phosphate ion (PO ₄ : g/
): Zinc ions (Zn:g/) = phosphate ions and nitrate ions at a ratio of 10 to 35:1, 2 to 20g/,
Using a zinc phosphate film chemical conversion treatment solution containing 5 ppm or more of trivalent iron ions (Fe ³⁺ ) as a chemical conversion accelerator,
A phosphate treatment method characterized by carrying out treatment at a low temperature range of 10 to 40°C while controlling the pH of the liquid to be over 3.5 to 4.5 or less. 2 Steel, zinc, and zinc alloy plated steel materials are pre-treated with 1 to 50 ppm of titanium ions and 200 to 200 ppm of phosphate ions.
3000ppm, pyrophosphate ion 50-600ppm, treated with an aqueous surface conditioner solution with pH 8.0-9.5 below 40℃, and then treated with nitrite ion, chlorate ion.