JPS64105B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for efficiently cleaning the inside of a flux cylinder and die head of a coating machine that coats coated welding rod core wire with flux upon completion of coating.

When manufacturing a coated welding rod, it is well known that a coated welding rod is obtained by applying a wet-kneaded flux adjusted to a desired composition around a core wire, and then sending the flux to a drying process and drying it. A commonly used coating method will be explained based on the drawings.

In Fig. 1, 1 is a wet mixer for selectively mixing fine powders of various metal oxides, silicate compounds, carbonates, etc. and kneading them with water glass; 2 is a wet mixer for selectively mixing fine powders of various metal oxides, silicic acid compounds, carbonates, etc.; A flux chute 3 that can be cut out is a flux forming machine connected to the cutting opening of the chute 2, and as shown in the figure, it has a forming cylinder 4 that receives the flux from the shoot 2, and one end inside the forming cylinder 4. It is composed of a piston 5 that is inserted so as to be movable forward and backward, and a hydraulic cylinder 6 that operates the piston 5. The flux is extruded by the molding machine 3 to the other end of the molding cylinder 4 as a relatively short cylindrical molded product 7. Reference numeral 8 denotes a coating machine for coating the core wire with the molded flux 7 sent from the molding machine 3 via the conveyor, and the coating machine 8 places a plurality of the fluxes 7 in series. a flux cylinder 10 installed on one end of the receiving plate 9, and a flux pushing piston 11 installed on the other end of the receiving plate 9.
and a hydraulic cylinder 12 for moving the piston 11 forward and backward, and the flux cylinder 10
A die head with a built-in die is integrally attached to the tip of the die. Reference numeral 13 denotes a core wire feeder that supplies the core wire to the die head in a direction intersecting the line of the coating machine 8, and is composed of a core wire storage box 14 and a supply roller 15. 16 is a cross conveyor for transporting the coated core wire; 17 is the cross conveyor 1;
A conveyor that conveys the core wire in a direction perpendicular to 6.
This continues to the next drying process.

When actually applying the coating material using the above-mentioned conventional coating device, a plurality of pieces of flux 7 formed by the flux forming machine 3 are simultaneously placed on the receiving plate 9 of the coating machine 8, and this one lot is applied by hydraulic pressure. The piston 11 operated by the cylinder 12 pushes the flux into the flux cylinder 10 and pushes it out from the die of the die head while applying pressure.
From step 3, the core wires are fed one by one to the die head, and extruded from the die head with a constant thickness of flux coated around the core wires. The supply of core wire is carried out sequentially and continuously until the pressure extrusion of one lot's worth of flux is completed, but when the extrusion limit is reached, the pressurizing operation and the core wire supply operation are stopped, and the piston 11 returns to the starting position. The flux of the next lot waiting on the side of the receiving plate 9 is received on the receiving plate 9, and the above-mentioned pressure extrusion operation is repeated again.

If the same brand of flux is used, a coated welding rod is manufactured by repeating this coating cycle.
However, when manufacturing a wide variety of coated welding rods of various brands, it is necessary to change the type of core wire and/or the type of flux. Particularly in the case of special brands of welding rods that are produced in small quantities, switching is performed frequently. When the brand is changed in this way and the type of flux is changed, the previous flux will remain in the die head, so unless it is quickly removed, the changeover time will be longer and the coating machine will be damaged. The operating rate of the equipment will inevitably be low. Flux remaining inside the die head is tightly compressed under high pressure by the piston of a hydraulic cylinder, and the shape of the die head is complex, so conventionally it required a lot of effort and a long time for workers to remove it. and manually remove the
After that, I washed it with water. In order to reduce the time and labor required for this manual work, attempts have been made to press and insert a piston with a convex jig attached to the piston head into a flux cylinder or die head, but this method reduces the amount of flux remaining inside the die head. Although only the part inserted by the convex jig can be removed, the flux firmly attached to the inner surface wall of the die head cannot be removed and the operator has to resort to manual work. As a result, it took about 50 minutes to switch brands, which lowered the operating rate of the coating machine and hindered productivity improvements.

The present invention solves the problems found in the above-mentioned conventional coating means. In other words, the flux remaining inside the die head when switching to a different brand, as well as the flux adhering to the inner surface of the flux cylinder, can be removed without manual intervention, and the cleaning time can be shortened as much as possible with a highly productive coating. The purpose of the present invention is to provide a method for cleaning a welding rod paint machine. The gist of the present invention to achieve this object is to press and insert ice or solid carbon dioxide chunks into the flux cylinder and die head using the piston of a hydraulic cylinder, thereby reducing the amount of ice or solid carbon dioxide that adheres to and remains inside the paint sprayer. The purpose is to remove flux.

The details of the present invention will be explained below based on embodiments shown in the drawings.

FIGS. 2A to 2E are work process diagrams for explaining the cleaning process of the coated welding rod coating machine according to the present invention.

That is, (a) the coating of the same brand of coated welding rod is completed after repeating the coating cycle as described above, and the piston 11 of the hydraulic cylinder 12 is returned to the starting position. At this time, the previous flux 7 remains inside the die head 18,
Further, flux 7' is attached to the inner surface of the flux cylinder 10.

(b) Square or round ice blocks 21, which are slightly smaller than the inner diameter of the flux cylinder 10, are filled into the flux cylinder 10 by moving the piston 11 back and forth. Since the coating machine 8 is cleaned not only on the die head 18 but also on the inner surface of the flux cylinder 10, the amount of ice cubes 21 should be approximately the same as the volume of the flux cylinder 10 as shown in the figure. Although the shape and size of the ice block are not particularly limited, it is preferable that the block be as large as possible so that it can be easily inserted into the flux cylinder 10. When cleaning again, the die head 18
Although the coating die 19 and the core wire guide tube 20 may be removed or left as they are as shown in the figure, it is better to remove them in order to improve work efficiency.

(c) Next, at the same time as painting the coated welding rod, the piston 1
1 is advanced and the ice block 21 is pressed and inserted into the inside of the flux cylinder 10. The ice block 21 is pressed and crushed by the piston 11 and deformed into a shape conforming to the internal shape of the flux cylinder and the die head, and the remaining flux stuck inside the die head is pushed out from the die part to the outside of the die head. The ice 21 crushed by the pressure of the piston 11 moves to the die portion of the die head while peeling off the flux 7' adhering to the inner surface walls of the flux cylinder 11 and the die head 18. As the piston 11 moves forward, flux is first extruded from the die 19 portion of the die head 18, then a mixture of ice and flux is extruded, and finally ice is extruded, and finally, when the extrusion limit of the piston 11 is reached, extrusion is stopped. finish.

(d) With the die head 18 filled with ice 21', the piston 11 is moved backward and stopped at the starting position.

(E) Next, after separating the die head 18 and the flux cylinder 10 to remove the ice packed inside the die head 18, the ice is pressed in the opposite direction from the die 19 portion toward the inside of the die head, as shown in E. The ice, which has taken on the internal shape of the die head, can be easily removed from the cylinder mouth.
Finally, the die head 18 is attached to the flux cylinder 10, and the cleaning of the atomizer is completed.

By performing the operations (a) to (e) above, the interior of the flux cylinder and die head can be thoroughly cleaned in every nook and cranny, and the time required for this is extremely short, about 5 minutes, compared to conventional methods. It takes about 1/10 the time compared to manual cleaning.

In addition to ice, a block of solid carbon dioxide (trademark dry ice) is used as a substance for cleaning the paint sprayer.
may also be used. Dry ice is convenient because it does not melt into water like ice.

As explained above, according to the method of cleaning a coated welding rod coating machine using ice or solid carbon dioxide of the present invention, the cleaning time, that is, the time for changing brands can be drastically shortened, and productivity can be improved. . Furthermore, according to the present invention, the structure of the coating machine can be made more complex in order to improve coating properties. Furthermore, since the cleaning work can be done without manual work by the worker, the labor of the worker can be significantly reduced, and the cleaning condition is also very clean, which is a great effect of the present invention. The present invention is suitable for producing many types and brands of coated welding rods, and has great industrial value.

[Brief explanation of drawings]

FIG. 1 is an overall perspective view showing the coating apparatus, and FIGS. 2A, 2B, 2C, 2 and 3 are work process diagrams for cleaning the coating machine according to the present invention. 7... Flux, 8... Painting machine, 9... Receiving plate, 10... Flux cylinder, 11... Piston, 12... Hydraulic cylinder, 18... Die head, 19... Painting die, 21... Ice block ,2
1'...Ice.

Claims (1)

[Claims] 1 When cleaning the inside of the coated welding rod coating machine,
A coated welding rod coating machine that removes flux adhering to and remaining inside the coating machine by pressing and inserting a lump of ice or solid carbon dioxide into a flux cylinder and a die head using a piston of a hydraulic cylinder. How to clean.