JPS6250237B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a welding rod coating coating apparatus, and more particularly to a coating apparatus in which a coating die head and a flux cylinder can be separated and connected as necessary.

As one of the manufacturing processes for coated welding rods, there is a coating process in which a kneaded coating agent (flux) is uniformly applied around the core wire. A conventional coating system for this purpose is one in which a flux forming machine and a coating machine are separated. That is, after the flux sent from the flux shoot is formed into a short cylindrical shape using a forming press or the like, the flux molded product is sent to the next flux coating machine using a conveyor or the like. In a coating machine, when a flux molded product is pushed into a cylinder and pressurized by a piston of a pressurizing cylinder such as a hydraulic cylinder, the flux is discharged from a die portion of a die head attached to the rear end of the cylinder. At this time, the core wire is supplied to the die of the die head from another direction at a predetermined speed, so that the core wire exits the die with its periphery covered with a flux layer concentrically.

Due to its structure, the conventional coating equipment described above has the problem that the interruption time from the end of coating one lot of flux to the start of coating the next lot is relatively long, and when changing the flux, the changeover time is quite long. are doing. Therefore, the inventors of the present invention have solved these problems and developed a revolver-type coating device in which at least one pair of flux cylinders is held interchangeably between two positions: a flux forming position and a flux painting position. It has been developed and has already been filed.

The present invention is effective when applied to this new coating method, and provides a coating agent coating device that can automatically connect and disconnect the flux cylinder and die head, and can smoothly bleed air from the flux. The purpose is to provide

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

First, to explain the new coating method, in Fig. 1, 1 is a flux chute that can cut out the flux sent from a wet mixer in predetermined amounts by an extrusion cylinder 2, and 3 is the cutting opening of the chute 1. 4 is a base on which the molding/painting machine 3 is installed, 5 is a core wire feeder, 6 is a cross conveyor, 7 is a molding press cylinder, and 8 is a die head for painting. be.

The flux forming and coating machine 3 is provided with two rotating disks 10, 11 whose centers are fixed to a rotating shaft 9 supported on a base 4.
A pair of flux cylinders 12 and 13 are held symmetrically across the rotating shaft 9, and a pair of flux cylinders 12 and 13 is held at one end side (opposite side of the die head) at a distance for painting. It is constructed by fixing a pressure cylinder 14 and a molding pressure cylinder 15 to a base 4. The rotating disks 10, 11 are rotated by the rotation of a rotating shaft 9 connected to a suitable drive device, and the pair of flux cylinders 12, 13 are moved to two desired positions, that is, the flux coating position (coating cylinder). The axial center of the flux cylinder 14 coincides with the axial center of the flux cylinder) and the flux forming position (the axial center of the flux cylinder coincides with the axial center of the forming cylinder 15).

Further, the forming presser cylinder 7 is installed at the other end of the flux cylinder corresponding to the flux forming position, and the coating die head 8 is installed at a position connectable to the flux cylinder at the coating position. A flux receiving cylinder 16, which is integrated with the cutting opening of the flux shoot 1, is arranged between the molding pressure cylinder 15 and the flux cylinder 12 or 13.

Therefore, a pair of flux cylinders 1
2 and 13 are in the predetermined flux forming and painting position, the painting pressurizing cylinder 14 is operated to move the piston 17 into the flux cylinder 1.
2, the flux is pressurized and ejected from the die of the die head 8. At this time, the core wire is supplied to the die head 8 from the core wire feeder 5, and the core wire is coated with flux. At the same time, the other molding pressurizing cylinder 15
, the piston 18 is inserted into the flux cylinder 13 through the receiving tube 16, and the piston of the forming presser cylinder 7 is inserted from the other end of the flux cylinder 13, and the flux is formed by these two pistons. Let's do it. 1
Immediately after completing one batch of painting and molding operations, the flux cylinder is rotated and replaced, and then the next painting and molding operation is restarted.

Therefore, in the above-mentioned coating apparatus, the pair of flux cylinders are made interchangeable by rotating the respective positions, and the die head 8
Since the flux molded material in the flux cylinder connected to the die head is supplied under pressure to the die head side, a good connection state is obtained between the flux cylinder and the die head when flux is supplied under pressure, and when disconnected, the flux is supplied to the die head side under pressure. It is necessary to leave a sufficient distance from the die head so that rotational movement of the cylinder is not hindered. Further, if excess air exists in the flux, it will have a detrimental effect on the painting operation, so it is necessary to remove air almost completely during painting.

The present invention aims to provide a coating apparatus having a flux cylinder and die head connection structure that can satisfy the above requirements.
A specific example is shown in FIG. 2 and below.

FIG. 2 shows an example of the present invention in which the die head 8 is of a single head type. As shown in the figure, the flux cylinder 12 is held slidably in the axial direction with respect to a frame 10' (in the case of FIG. 1, this portion corresponds to the rotating disk or is fixed to the disk). , a gap adjustment ring 19 is screwed onto the tip thereof. A groove 20 is formed in the other die head 8 to guide the flux in a direction perpendicular to the axial direction of the flux cylinder 12, and a die 21 is detachably attached to the outlet side of the groove 20.
Further, a core wire guide 22 is built-in so as to face the die 21 . Furthermore, as shown in FIG. 3, at least one (two in the figure) circumferential air venting groove 23 and a plurality of communication grooves 24 are formed in the distal end surface 12a of the flux cylinder 12 in the radial direction. There is. It is preferable that such air vent grooves and communication grooves are also formed on the die head 8 side end surface 8a with which the distal end surface 12a of the cylinder 12 comes into contact.

Further, as will be described later, the gap adjustment ring 19 serves as a stopper for the flux cylinder 12, which is pulled back by the frictional force of the piston after painting is completed. Therefore, by appropriately adjusting the position of the ring 19, a gap between the ring 19 and the die head can be created to a degree that does not hinder the rotational movement of the cylinder 12.

4 and 5, the die head 8' is constructed as a double-headed rotary head. That is, a shaft 25 passes through the die head main body so as to be orthogonal to the axis of the flux cylinder 12, and rotatably supports the die head. A pair of flux grooves 20A, 20B and dies 21A, 21 are provided in the die head 8' at symmetrical positions about the axis 25.
B is provided. Furthermore, as shown in FIG. 5, it is necessary to fix the position of the die head 8' during painting, so positioning cylinders 26 are provided at the top and bottom of the die head 8', and the extensible tip engaging tool 27 is fixed to the die head. It is necessary to be able to fit into the upper and lower surfaces of 8'. In addition,
Since the other parts are the same as those shown in FIG. 2, their explanation will be omitted.

Next, the operation of the present invention will be explained.

When supplying the flux molded product filled in the flux cylinder 12 to the die head 8, when the piston 17 of the pressure cylinder for painting is inserted from the left end of the flux cylinder 12 and moved forward, the packing 17a of the piston 17 and the cylinder Due to the frictional force between the cylinder 12 and the inner surface of the die head 8, the cylinder 12 and the piston 17 slide to the right with respect to the pedestal 10'.
a comes into close contact with a. In this state, the cylinder 12 stops and only the piston 17 continues to move forward. As a result, the flux in the cylinder 12 is forced into the groove 20 of the die head 8 through the connection between the cylinder 12 and the die head 8, and is coated around the core wire fed through the core wire guide 22 to form the die. Released from 21. While this painting operation continues, the cylinder 12 is pressed against the die head 8, and the connection state is maintained well, but the flux molding contains a considerable amount of air, which may cause excess If it passes through the die in this condition, it may interfere with the painting process, so it is necessary to bleed the air beforehand. In the present invention, since air vent grooves 23 and 24 are formed in the relative contact surfaces of the flux cylinder 12 and/or the die head 8, the air in the flux passing under pressure through this contact position is transferred to the air vent grooves. It will be discharged through the process.

When the forward movement of the piston 17 reaches its limit and the coating of flux for one lot is completed, the piston 1
7 begins to move back, but due to the backward movement of the piston 17, the flux cylinder 12 moves back due to frictional force, and the contact with the die head 8 is severed.
The flux cylinder 12 is retracted by the ring 19.
It stops when its rear surface hits the pedestal 10'.

When the piston 17 is retracted and returned to the position shown in FIG.
is rotated 180 degrees by rotating the rotating shaft 9 and the rotating disks 10 and 11, and one flux cylinder 12 is moved to the flux forming position and the other flux cylinder 13 is moved to the flux coating position. In addition, flux cylinder 1
While the flux coating in step 2 is progressing, the piston 18 of the pressurizing cylinder 15 and the forming presser cylinder 7 are being moved in the other flux cylinder 13.
The flux is shaped by the action of the piston. Therefore, even after the flux cylinder is rotated 180 degrees, flux painting and molding operations are resumed immediately.

In addition, in the case of flux replacement, etc., the flux cylinder and die head can be easily separated, so cleaning or maintenance thereof is easy and can be done quickly. In particular, when the die head is configured as a double-headed die head as shown in Fig. 4, simply rotating the die head 8' by 180 degrees at the time of switching will set the dies and flux press-fit grooves in advance for the next flux coating. This contributes to a significant reduction in switching time.

As explained above, according to the coating apparatus of the present invention, the flux coating and molding operations can be performed efficiently and these replacement operations can be performed quickly, and the connections between the coating die head and the flux cylinder can be automatically transferred. Since they can be connected and disconnected, they can be handled independently, which is very convenient. In addition, air removal from the flux is carried out extremely smoothly, resulting in good results in painting work.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the coating apparatus according to the present invention, FIG. 2 is a plan view showing a specific example of the connection structure between the die head and the flux cylinder, and FIG.
Figures A and B are a detailed sectional view and front view of the contact surface of the flux cylinder, Figure 4 is a plan view showing another example of Figure 2, and Figure 5 is a front view of Figure 4. 1... Flux shoot, 3... Flux molding/painting machine, 5... Core wire feeder, 6... Cross conveyor, 7... Forming presser cylinder, 8... Die head, 8'... Double-headed die head , 9... Rotating shaft, 10, 11... Rotating disk, 12, 13...
Flux cylinder, 14... Pressure cylinder for painting, 15... Pressure cylinder for molding, 16...
...Flux receiver, 17, 18... Piston, 1
9... Gap adjustment ring, 20... Groove, 21... Die, 22... Core wire guide, 23... Air release groove.

Claims (1)

[Scope of Claims] 1. A coating coating device consisting of a die head that performs coating by supplying core wire and flux from intersecting directions, and a flux cylinder rotatably provided so as to be connected to and disconnected from the die head. The coating material is characterized in that the flux cylinder is held on a stand so as to be slidable in the axial direction, and an air vent groove is formed in the contact end surface of at least one of the facing flux cylinder and die head. Painting equipment. 2. The die head is formed into a double-headed shape with a pair of flux guide grooves and a die at symmetrical positions,
2. The coating device according to claim 1, wherein the coating device can be rotated and fixed at a predetermined position.