JPS6247074B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides coating materials (flux) from different methods.
The present invention also relates to a coating die head capable of supplying a core wire and coating a flux around the core wire to obtain a coated welding rod.

When manufacturing coated welding rods, it is necessary to uniformly apply flux around a core wire of a desired size. Painting equipment for this purpose requires a painting die head that has a conical guide groove for guiding the flux and a die that is replaceably attached to the tip of the groove, and flux is supplied under the required pressure to this die head. At the same time, the core wire is fed along the axis of the die to perform the coating work.

A conventional coating die head of this type has a structure in which it is firmly attached to the tip of a pressurized flux supply cylinder (flux cylinder) by means of bolts or the like. Therefore, when changing the flux due to a change in welding rod brand, for example, once the die head is removed from the flux cylinder, the previous flux remaining in the die head is manually cleaned, and the die is adjusted to the specified size. After replacing it, I reattached it to the cylinder and started painting again. For this reason, when changing the flux, a considerable amount of switching time is required, and the coating interruption time becomes long.As a result, the operating rate of the coating equipment is reduced, and productivity improvement is hindered. In addition, there are also problems with maintenance and inspection of the die head, which prevents work from proceeding smoothly.

The inventors of the present invention have conducted various studies to solve the problems of conventional coating equipment including the die head described above, and have installed at least a pair of flux cylinders between the flux coating position and the flux forming position. We have developed a revolver-type painting device that can be held interchangeably with other tools, and have achieved the desired effect.

The present invention is ideal for use as a die head in this new coating equipment, and is practical because it can quickly respond to flux changes or core wire size changes, and can significantly shorten changeover time. The purpose of the present invention is to provide a die head for coating a coating material with high properties.

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

FIG. 1 is a plan view showing an example of a die head according to the present invention, and FIG. 2 is a plan view. In the figure, 1
2 is a long block-shaped die head body, 2 is a shaft that passes through the center of the die head body 1 in the short diameter direction and is fixed, and 3 is a bearing for the shaft 2, which allows the die head body 1 to move in one direction. Rotatably held. 4a and 4b are flux press-fit grooves formed symmetrically on both sides of the die head body 1 with the axis 2 as the center;
are curved from both opposing sides of the die head body 1 while narrowing in diameter, and are formed to pass through one surface of the die head body 1. 5 is a die that is replaceably mounted on the outlet side of the press-fit grooves 4a and 4b in the die head body 1, and 6 is a core wire guide that is inserted into the die head body 1 so as to coincide with the axis of the die 5. The guide 6 is also replaceable.

In addition, in the above-mentioned double-head type die head, one of the press-fit grooves is used to match the flux supply cylinder, and the die head is moved between the shafts as necessary.
Since the die head body 1 is rotated around the die head and replaced with the other press-fit groove, a means for firmly fixing the die head body 1 is required when the die head is used. As this fixing means, for example, as shown in FIG. 2, positioning cylinders 7 are placed oppositely above and below the die head body 1, and a holding part 8 attached to the tip of the cylinder rod is inserted into a recess 9 provided on the side of the die head body 1. It is configured by fitting.

Note that the means for fixing the position of the die head body 1 is not limited to the example shown in the drawings, but may be any other mechanism as long as it has the same function. In the figure, 19 is a flux cylinder filled with a desired flux, and 17 is the flux cylinder 19.
The figure shows a piston for pressurizing the flux inside and supplying it to the press-fitting groove 4a of the die head body 1, and the connection part between the die head body 1 and the flux cylinder 19 is designed to prevent flux from leaking and to smoothly bleed air. It is preferable to have a structure that does not impede rotational movement of the flux cylinder.

Next, the usage condition when the die head of the present invention is installed in an actual coating equipment will be explained.

The coating coating equipment shown in Fig. 3 is capable of simultaneously performing flux forming and coating and changing the forming and coating positions in a short period of time. A flux receiver 13 is connected to the cutting opening of the chute 11, and 13 is a pressure cylinder for forming flux fixed to one end of the receiver 12 in the axial direction.
Reference numeral 14 denotes a flux coating pressure cylinder fixed on the base 15 almost parallel to the molding pressure cylinder 13, and each pressure cylinder 13, 14 has a predetermined stroke in the axial direction by its operation. The rod has pistons 16 and 17 that reciprocate across the rod. 18 and 19 are a pair of flux cylinders in which the pistons 16 and 17 of the pressurizing cylinders 13 and 14 can be freely moved in and out, and the flux cylinders 18 and 19 are two circular cylinders that rotate about a rotating shaft at the center. They are held in a symmetrical position by plates 20 and 21 and interchangeable by rotation of the disks 20 and 21 through 180 degrees. Reference numeral 22 indicates a forming presser cylinder installed at the other end of the cylinder 18 at the flux forming position, 23 indicates a double-headed die head having the above-described structure and is set at the flux coating position, and 24 indicates a core for supplying the core wire to the die head 23. The wire feeder 25 is a cross conveyor that receives and transfers the coated core wire.

First, one flux press-fitting groove of the die head 23 is aligned with the flux cylinder 19, and the die head 23 is fixed by the positioning cylinder 7.
Started flux painting and molding work. The flux cylinder 19 is filled with a predetermined amount of flux (cylindrical molded material), and the pressurized cylinder 14 is operated to move the piston 17 (corresponding to the piston 10 in FIG. 1) into the cylinder 19. When the flux is moved forward, it is pressurized and ejected from the die at the tip through the press-fit groove of the die head 23. At this time, since the core wires are being sequentially fed to the die 5 of the die head 23 from the core wire feeder 24,
The flux is coated around the core wire, discharged from the die 5, and transferred to the cross conveyor 25.
At the same time as this flux coating operation, flux is being formed in the other flux cylinder 18 by the piston 16 of the pressurizing cylinder 13 and the piston of the forming presser cylinder 22. Therefore, when the pressure extrusion of the molded product in the flux cylinder 19 is completed and the flux forming in the other flux cylinder 18 is completed,
Return the pistons 16 and 17 and remove the discs 20 and 21.
Turn the flux cylinder 1 by 180°.
After changing the positions of 8 and 19, the above-described painting and molding operations may be performed again.

Therefore, in the case of flux change, etc., the die and wire guide on the unused part of the die head are installed in advance according to the next wire size, and when changing, the positioning cylinder 7
Release the fixation of the die head with
Swap the positions. The next flux coating and molding are restarted using the press-fit groove 4b newly set at the coating position and the flux cylinder whose interior has been cleaned. On the other hand, the press-fitting groove 4a, die 5, etc. that have been turned to the non-operating side are at that position, where the flux remaining inside is completely removed or maintained, and then they are put on standby in preparation for the next switching. Of course, the die or the wire guide may be replaced as necessary.

As explained above, according to the double-headed painting die head of the present invention, it is possible to change to a new ready-to-use die side whenever necessary, and to clean and maintain the used part while the other side is in use. can also be implemented. Moreover, the cleaning and maintenance side is located on the opposite side of the flux cylinder with sufficient space, making the work easier.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of the die head according to the present invention, FIG. 2 is a front view of FIG. 1, and FIG. 3 is a perspective view showing the die head of the present invention in use. DESCRIPTION OF SYMBOLS 1... Die head body, 2... Shaft, 3... Bearing, 4a, 4b... Flux press-fit groove, 5... Die, 6... Core wire guide, 7... Positioning cylinder, 8... Support part, 9 ... recess, 23 ... die head.

Claims (1)

[Claims] 1. In a die head for coating coating formed separately from a flux cylinder and connectable to the tip of the cylinder, a pair of symmetrical flux press-fitting grooves and a die are provided in the die head body, and the die head body is rotated. A die head for coating coating material, which is characterized by being able to be freely fixed at a predetermined position.