JPS6145971Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a pouring device in which a pouring nozzle formed on the bottom of a pouring ladle is opened and closed by vertical movement of a stopper disposed inside the pouring ladle. It is something.

Generally, a pouring nozzle is formed on the bottom of the pouring ladle,
In a pouring device that supplies molten metal from the pouring nozzle to the mold, the pouring speed is determined by the flow rate of the molten metal from the pouring nozzle, and if this pouring speed changes, the quality of the casting will vary. . Therefore, in such pouring equipment, it is necessary to keep the flow rate of the molten metal from the pouring nozzle as constant as possible, but in reality, the pressure applied to the pouring nozzle varies depending on the amount of molten metal. Therefore, in order to maintain a constant flow rate of molten metal from the pouring nozzle, it is necessary to adjust the opening degree of the pouring nozzle according to the amount of molten metal.

However, in the past, the opening degree of the pouring nozzle was adjusted by the amount of rotation of the operating lever that moves the stopper up and down via a link mechanism, etc., and it was difficult to move the heavy stopper up and down. Because it required physical strength, it required a great deal of effort to adjust the opening of the pouring nozzle to the desired opening at the start of the casting process and to maintain that opening at a constant level during the casting process. However, there was a problem in that it was difficult to maintain a constant outflow velocity because the degree of change in the outflow velocity with respect to changes in the opening of the nozzle was large.

Also, in the past, the central part was engaged with the tip of the piston rod of the cylinder device for opening and closing the nozzle.
A lever is provided, one end of which is pivoted so that its vertical position can be adjusted by an opening adjustment device, and the stopper for opening and closing the nozzle is moved up and down by the vertical movement of the other end of the lever due to the operation of the cylinder device. This device has the advantage that the amount of opening when the nozzle is opened can be adjusted by moving the pivot point of the lever up and down using the opening adjustment device, making it easy to adjust the flow rate. In this device, the nozzle opening/closing mechanism requires a link mechanism as described above, and has the disadvantage that the nozzle opening/closing mechanism is large and complicated.

In view of these conventional problems, the purpose of the present invention is to provide a pouring device equipped with a nozzle opening/closing mechanism that allows easy adjustment of the nozzle opening degree and has a simple structure. Examples will be described based on the drawings.

In FIG. 1, reference numeral 10 indicates a support stand that supports a pouring ladle 11 having a rectangular horizontal cross section, and this support stand 10 is connected to a pair of support rails arranged in parallel on the ground at an appropriate interval. It is guided and supported by 12 and 13 so as to be movable in a direction perpendicular to the plane of the paper, and is moved by a drive device (not shown). A nozzle body 15 having a pouring nozzle 15a is fixed to the bottom of the pouring ladle 11 by penetrating the bottom surface,
The pouring nozzle 15a is closed by a stopper 16 which is disposed within the pouring ladle 11 so as to be movable up and down. Then, the molten metal is filled into the pouring ladle 11 at a molten metal replenishment position (not shown), and the molten metal is supplied into the mold 18 set on the workbench 17 by opening the pouring nozzle 15a at the shown casting position. It's summery.

Note that 20 indicates a worker platform installed on one side of the support platform 10, and 23 indicates an operation panel fixed via a support plate 22 to the same side of the support platform 10 as the worker platform 20. A push-button switch SW for nozzle opening command, which is operated by the operator OP, is attached to the panel 23.

Next, to explain the opening/closing mechanism for opening and closing the pouring nozzle 15a, an air cylinder device 30 for opening and closing the nozzle is provided on the upper part of the outer wall 11a of the pouring ladle 11 on the side closer to the worker platform 21. The piston rod 32 is mounted so that the moving direction of the built-in piston 31 is vertical, and the tip of the piston rod 32 protruding above the piston 31 is connected to the upper part of the stopper 16 via a connecting member 35 extending in the horizontal direction. The piston 31 and the stopper 16 are configured to move up and down integrally.

On the other hand, the tip of the piston rod 33 that projects downward from the piston 31 extends downward through a reference member 36 fixed to the pouring ladle 11.
A male thread 37 is formed on the outer periphery of the tip portion that protrudes downward from the reference member 36 . A contact member 38 that comes into contact with the lower surface of the reference member 36 to regulate the rising end position of the piston 31 is screwed into the male thread 37 .

Furthermore, a gear box 40 fixed to the lower part of the outer wall 11a supports a rotation shaft 42 having a worm wheel 41 fixed to the center thereof so as to be rotatable concentrically with the piston rods 32 and 33 of the cylinder 31.
An operation face plate 45 having approximately the same outer diameter as the abutment member 38 is integrally fixed to the tip of the protrusion of the rotation shaft 42 that protrudes toward the top of the gear box 40 . A plurality of engagement shafts 46a to 46a, which together with the operation panel 45 constitute an operation member, are provided on the outer edge of the upper surface of the operation panel 45.
6d protrude in a direction parallel to the axis of the piston rod 33 at equal angular intervals, and this engagement shaft 46a
As shown in FIG.
It is loosely fitted into engagement grooves 38a to 38d, which are formed parallel to the axis of No. 3 and have a U-shaped cross section. The lengths of the engaging shafts 46a to 46d are such that even when the piston 31 is raised and the abutting member 38 is in contact with the reference member 36, the engaging shafts 46a to 46d remain in the engaging grooves 38a to 38d.
The length is set so that it does not separate from the

On the other hand, the worm wheel 41 fixed to the rotation shaft 42 is attached to the outer wall 11 in the gear box 40.
It is supported so that the axis is oriented in the direction perpendicular to a,
It meshes with a worm 48 that constitutes a reduction gear mechanism together with the worm wheel 41, and this worm 48 is arranged on the upper part of the operation panel 23 via a universal joint 50 and a connecting shaft 51 extending in the horizontal direction. It is connected to the operating handle 52. Therefore, the operator OP operates the operation handle 52 in a state in which the contact member 38 is separated from the reference member 36, that is, in a state in which the stopper 16 is lowered by the lowering of the piston 31 and the pouring nozzle 15a is closed. When rotated, this rotational power rotates the operation face plate 45 via the connecting shaft 51, the universal joint 50, the worm 48, and the worm wheel 41, thereby changing the axial position of the contact member 38 on the piston rod 33. This adjustment changes the rising end position of the stopper 16, that is, the opening degree of the pouring nozzle 15a when the pouring nozzle 15a is opened.

In this way, when the opening adjustment operation is completed and the operator OP presses the switch SW on the operation panel 23,
An unillustrated control circuit operates and the air cylinder device 30
High-pressure air is supplied to the lower chamber, which causes the stopper 16 to rise and open the pouring nozzle 15a. However, since the opening degree of the pouring nozzle 15a has been appropriately adjusted by the above-mentioned operation, the pouring nozzle 15a is opened. The flow rate of the molten metal from the hot water nozzle 15a is regardless of the change in the amount of molten metal.
It can be brought close to a certain value. During the casting operation, the opening degree of the pouring nozzle 15a can be maintained constant, so there is no fear that the pouring speed of the molten metal will change and the casting speed will change, and the casting operation can be performed stably. .

If you want to adjust the opening of the pouring nozzle 15a during the casting operation, temporarily stop pressing the switch SW, adjust the opening with the pouring nozzle 15a closed, and then press the switch SW again. You can restart pouring the hot water. Further, a thrust bearing may be provided on the upper surface of the abutting member 38 or the lower surface of the reference member 36 so that the abutting member 38 can rotate even when the abutting member 38 is in contact with the reference member 36. In this way, the opening degree of the nozzle can be adjusted even when the nozzle is open.

As described above, in the present invention, the fluid pressure cylinder device for opening and closing the nozzle is fixed to a fixed part, and the abutment member is screwed to the piston rod of this fluid pressure cylinder device, and the position of this abutment member is adjusted. The opening of the nozzle is adjusted by using the operating handle provided on the fixed part, so even if you do not hold the operating handle during casting, you can easily open the pouring nozzle. It is possible to keep the casting rate constant and the casting speed almost constant, which has the advantage of good workability.

In addition, in this invention, the opening is adjusted by rotating the abutment member that is screwed onto the piston rod, so if the opening is adjusted with the pouring nozzle closed, the opening can be adjusted using the operating handle. The only rotational force that needs to be applied is the force that rotates the contact member along the thread of the piston rod, which has the advantage that the opening degree can be adjusted very easily.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a schematic longitudinal cross-sectional view showing the overall structure of the pouring device, and FIG.
46d is an enlarged perspective view showing the engagement relationship. 11...Pouring ladle, 15a...Pouring nozzle, 1
6... Stopper, 30... Air cylinder device, 3
1... Piston, 32, 33... Piston rod, 36... Reference member, 38... Contact member, 41
... Worm wheel, 42 ... Rotation axis, 45 ...
Operation face plate, 46a to 46d... Engagement shaft, 48...
Worm, 52...operation handle.

Claims (1)

[Scope of utility model registration request] In a pouring device in which a pouring nozzle formed at the bottom of a pouring ladle is opened and closed by vertical movement of a stopper disposed inside the pouring ladle, a piston rod is connected to the stopper through a connecting member. a fluid pressure cylinder device that houses an integrally connected piston so as to be movable up and down and is fixed to a side surface of the pouring ladle;
A contact member is screwed into a threaded portion formed on a piston rod of the piston that protrudes from below the fluid pressure cylinder device, and a contact member is provided on a fixed portion and engages with the contact member in the process of the piston moving up and down. a reference member that together regulates the rising end position of the piston; and an operating member that is rotatably supported below the cylinder device and engages with the abutting member by allowing relative movement only in the vertical direction. and a gear mechanism that transmits rotation of the operating handle to the operating member.