JPH07115157B2 - Pouring equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to a pouring device, and more particularly to a pouring device used for pouring into a rotary metal frame in a centrifugal casting device.

BACKGROUND ART Conventionally, in a centrifugal casting apparatus for manufacturing cast iron pipes, etc., a pouring device for pouring molten metal into a rotating metal frame is a triangular ladle in a pouring gutter whose tip can be inserted into the rotating metal frame. In general, it is configured to supply the molten metal through the chute. With such a configuration, since the tilt angle of the triangular ladle and the amount of tapping water are proportional to each other, it is possible to do a fixed amount of pouring by a simple control of tilting the triangular ladle at a constant speed.
By performing the quantitative pouring in this way, the thickness and structure of the cast iron pipe can be made uniform, and high quality products can be obtained.

The structure of such a conventional pouring device will be described more specifically. The pouring spout is configured to be rotatable about its longitudinal axis, and a rotation driving means is provided at the base end of the pouring spout. Are connected. A triangular ladle is arranged above the rotary drive device, and a chute for fluidizing the molten metal at the base end of the pouring gutter is arranged below the spout of the triangular ladle.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in such a conventional configuration, since the triangular ladle is provided above the rotary drive device of the pouring gutter, it is necessary to arrange the heavy triangular ladle at a high position. There is a problem that the whole pouring device becomes large in size. In addition, since the height of the pouring outlet of the triangular ladle increases, the outflow rate of the molten metal increases, and when the pouring device starts moving backward at the start of pouring, a large amount of molten metal is poured at once due to inertia. It For this reason, not only the end plate of the rotating metal frame has to be made large, but there is also a risk of creating a hot water level. Also, especially in the case of the dry coating casting method in which the casting material is sprayed just before pouring on the inner surface of the metal frame during pouring, if a large amount of molten metal is supplied at one time, the casting material may be caught in the molten metal or There is a problem that the molten metal may flow into a portion that has not been sprayed and casting defects are likely to occur. Furthermore, since the pouring outlet is high, the chute becomes large, and the chute cannot be rotated together when the pouring gutter is turned over for residual iron treatment. There is also a problem that the structure must be divided and the structure becomes complicated.

Therefore, the present invention solves such a problem, the entire size does not become large, the outflow rate of the molten metal does not become excessively high, and therefore, the encapsulation of the mold material does not occur even in the dry coating casting method. It is an object of the present invention to provide a pouring device capable of integrating a pouring gutter with a pouring gutter.

Means for Solving the Problems In order to achieve the above object, the present invention provides a pouring trough whose tip portion can be inserted into a rotary metal frame, and a pouring trough provided at the base end portion of the pouring trough. A chute that guides the molten metal into this pouring trough, and a tilting type ladle capable of supplying the molten metal toward this chute, the triangular ladle is arranged on the side of the chute, In addition, the pouring outlet of the triangular ladle is located above the chute so that the triangular ladle can be tilted around a horizontal axis substantially parallel to the axis of the pouring gutter.

Action According to such a configuration, even if the triangular ladle is installed at a low position, it does not interfere with the rotary drive device connected to the base end of the pouring gutter. Therefore, a large-scale structure for arranging the triangular ladle at a high position is not required, and the entire structure can be made smaller, and the height of the pouring spout of the triangular ladle can be reduced, so that the molten metal outflow rate can be reduced. It does not become excessive, and there is no possibility that a large amount of molten metal will flow out at once at the start of pouring to create a molten metal boundary, or that a mold material will be caught in the dry coating casting method to cause defects. In addition, since the triangular ladle can be tilted around a horizontal axis that is almost parallel to the pouring gutter axis, the molten metal is poured from the pouring outlet of the triangular ladle in a direction substantially orthogonal to the pouring gutter axis. The flow from the pouring outlet of the triangular ladle is changed in the chute so that the flow direction is changed to a substantially right angle, and the flow is decelerated. It is prevented from becoming excessive. Furthermore, since the height of the pouring outlet of the triangular ladle is low, the chute can be downsized, and the chute pouring gutter can be rotated integrally with the chute so that the structure can be simplified.

Embodiment 1 In FIGS. 1 and 2, reference numeral 1 denotes a rotating metal frame, which is supported by a supporting roller 2 so as to be rotatable around its axis.
At a position facing the end surface of the rotary metal frame 1, there is provided a pouring carriage 3 which is movable along a pair of guide rails 4 parallel to the axis of the rotary metal frame 1. Both guide rails
A rack 5 is provided between 4 and 4, and a drive gear 7 rotatably driven by a drive motor 6 installed in the pouring carriage 3 meshes with the rack 5 so that the pouring carriage 3 is driven by the drive motor 6. It is configured to move.

A pouring gutter 8 is mounted on one side of the pouring carriage 3 so as to be rotatable around its axis. This pouring gutter 8
Is extended toward the rotary metal frame 1 so that it can be inserted into the rotary metal frame 1. Pouring truck 3
In the vicinity of the base end of the pouring gutter 8, a pair of rollers 10
Are provided, and these rollers 10 rotatably support the support ring 9. A support member 11 supports these rollers 10 at predetermined positions. The base end of the pouring gutter 8 is the pouring gutter 8
To the rotary drive device 13 for reversing the shaft around its axis
Connected via 12. The rotary drive device 13 is supported by a bracket 15 installed on a pedestal 14 provided on a side portion of the pouring car 3 so that the position in the vertical and horizontal directions can be adjusted. A chute 16 is provided above the base end of the pouring gutter 8 to smoothly guide the molten metal supplied from above into the pouring gutter 8.
However, it is provided integrally with this pouring gutter 8.

Reference numeral 17 denotes a triangular ladle, which is arranged beside the base end portion of the pouring gutter 8. The triangular ladle 17 is supported by a pair of supporting bases 19 installed on the pouring carriage 3, so that the pouring outlet 18 is located above the chute 16 and the pouring outlet 18 is provided.
Is configured so that it can be tilted about a horizontal axis substantially parallel to the axis of the pouring gutter 8. 20 is triangular ladle 17
A drive gear 21 attached to the output shaft of the motor for inclining the gear is engaged with a sector gear 22 attached to the side of the triangular ladle 17. And the drive motor 20
Is rotated at a constant speed, the triangular ladle 17 is tilted at a constant angular velocity, and the molten metal in the triangular ladle 17 can be supplied to the pouring gutter 8 in a fixed amount. Reference numeral 23 is a stopper that regulates the stop position of the triangular ladle 17.

Next, a pouring operation to the rotary metal frame 1 will be described. The molten metal is stored in advance in the triangular ladle 17. First, the pouring truck 3 is moved forward to insert the pouring trough 8 into the rotary metal frame 1, and the tip end thereof is positioned at the rear end of the rotary metal frame 1. Next, while the mold pouring material is being sprayed from the tip of the pouring gutter 8 onto the inner surface of the rotary metal frame 1, the pouring carriage 3 is started to retreat, and the drive motor 20 is operated to gradually move the triangular ladle 17 upward. Tilt. Then, the molten metal is supplied from the pouring outlet 18 of the triangular ladle 17 to the chute 16, the molten metal is supplied to the pouring gutter 8 through the chute 16, and the molten metal is poured from the tip of the pouring gutter 9 into the rotary metal frame 1. Make a bath.

At this time, since the height of the pouring port 18 of the triangular ladle 17 is low, the outflow rate of the molten metal from the pouring gutter 8 does not become excessive,
Moreover, since the triangular ladle is arranged on the side of the pouring gutter, when the pouring carriage 3 starts to retreat and starts pouring, a large amount of molten metal flows out at a time due to inertia, which creates a boundary. Occurrence is prevented. Further, since the triangular ladle 17 is configured to be tiltable around a horizontal axis substantially parallel to the axis of the pouring gutter 8, the pouring outlet 18 of the triangular ladle 17 is almost aligned with the axis of the pouring gutter 8. The molten metal can be poured out in the orthogonal direction.
Therefore, the molten metal from the pouring port 18 of the triangular ladle 17 is shot 16
At, the flow direction is changed to a substantially right angle, and the flow is deenergized, which also prevents the outflow rate of the molten metal from becoming excessive. Further, even if the dry coating casting method is carried out as described above, there is no possibility that the sprayed coating material may be rolled up or the molten metal may flow into a portion where the coating material is not applied, resulting in defects.

As described above, the pouring carriage 3 is moved backward while tilting the triangular ladle 17 at a constant angular velocity, whereby uniform pouring is performed on the entire inner surface of the rotary metal frame 1. Thus, when the pouring of the predetermined amount of molten metal is completed, the triangular ladle 17 tilts back to the stopper 23 until it stops and stops at the initial position, and the pouring gutter 8 is pulled out from the rotary metal frame 1. The pouring is finished.

Then, the pouring gutter 8 is reversed together with the chute 16 by the rotary drive device 13, and the residual iron in the pouring gutter 8 is dropped and removed. At this time, since the height of the spout 18 is low and the chute 16 is small, even if this chute 16 is integrally formed with the pouring gutter 8, there is no difficulty in terms of space and mechanism,
The pouring gutter 8 and the chute 16 can be integrally rotated.

As described above, according to the present invention, since the triangular ladle is provided on the side of the base end portion of the pouring gutter, the triangular ladle can be installed at a low position, and the triangular ladle can be installed. A large structure for arranging the pan at a high position is not required, and the overall structure can be made small.Because the height of the spout of the triangular ladle is low, the outflow speed of the molten metal does not become excessive, and At the start of pouring, there is no risk of a large amount of molten metal flowing out at once and creating a boundary, and there is no risk of defects such as involving the mold material even in the dry coating casting method. Since it can be tilted around a horizontal axis parallel to the axis, the molten metal can be poured from the pouring outlet of the triangular ladle in a direction almost orthogonal to the axis of the pouring gutter. Molten metal from the pouring outlet of the triangular ladle flows in the chute. The direction is changed to almost right angle,
The flow can be diminished, and this also prevents the outflow speed of the molten metal from becoming too high, and because the height of the pouring outlet of the triangular ladle is low, the chute can rotate together with the pouring trough and is compact. It can have a simple configuration.

[Brief description of drawings]

FIG. 1 is a plan view of a pouring device according to an embodiment of the present invention, and FIG. 2 is a view taken along the line II-II in FIG. 1 ... Rotating metal frame, 3 ... Pouring trolley, 8 ... Pouring gutter, 16 ...
… Shoot, 17 …… Triangle ladle, 18 …… Spout.

Claims (1)

[Claims] 1. A pouring trough whose tip can be inserted into a rotary metal frame, and a molten metal supplied from above which is provided at the base end of this pouring trough is guided into this pouring trough. And a tilting type triangular ladle capable of supplying molten metal toward the chute, the triangular ladle is arranged on the side of the chute, and the pouring outlet of the triangular ladle is located above the chute. The pouring device characterized in that the triangular ladle can be tilted around a horizontal axis substantially parallel to the axis of the pouring gutter.