JP3252338B2 - Melt supply device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molten metal supply device for pouring molten metal into respective casting machines disposed along a conveying path for supplying molten metal from a melting furnace to a plurality of casting machines.

[0002]

2. Description of the Related Art Conventionally, in order to supply hot water from a melting furnace to a plurality of casting machines, a main runner called a launder system and a branching runway corresponding to each casting machine are provided between the melting furnace and the plurality of casting machines. There is provided a molten metal supply device for disposing a molten metal path formed from the molten metal and pouring the molten metal from the inside of the branched molten metal path to the pouring port of the casting machine. As this molten metal supply device, for example, a well-known link mechanism type ladle hot water supply device is used, and by driving a link mechanism, the molten metal stored at the end of the branch hot water path is pumped up with a ladle and cast. The ladle is moved to above the pouring port of the machine, and the ladle is tilted at that position to pour the molten metal into the pouring port. In addition, it has been proposed to employ a pneumatic pressurized hot water supply apparatus. As shown in FIG. 5, an opening / closing gate provided on an end wall 55 of a branch hot water path 52 branched from a main hot water path 51. A pumping chamber 53 for storing the molten metal separated via 56 is provided adjacently, a pouring pipe 54 is set up from a lower portion of the side wall of the pumping chamber 53, and is turned U-turn downward above a pouring port 57 of the casting machine. With the open / close gate 56 closed, air pressure is introduced from the pneumatic device 58 into the pumping chamber 53, which pressurizes the molten metal surface to push down the molten metal surface, thereby pouring the molten metal from the tip of the pouring pipe 54. 57.

[0003]

In any of the above-described conventional molten metal supply devices, the molten metal drawn from the branching channel of the launder system is poured from above into the pouring port of the casting machine. The situation is that the molten metal drops once while being opened (open) and exposed to the air.
At this time, the temperature of the molten metal decreases, oxides are generated and mixed,
It has been clarified as a problem that various phenomena such as entrainment of air into the molten metal, which adversely affect the casting quality, occur. In order to solve this problem, it is necessary to supply the molten metal in a closed state (closed) via a hot water distribution pipe directly connected from the branching channel of the launder system to the pouring port of the casting machine.

According to the present invention, an electromagnetic pump is provided to directly connect a branching channel of a transporting channel, also called a launder system, provided between a melting furnace and a plurality of casting machines to a pouring port of the casting machine. It is an object of the present invention to provide a molten metal supply device in which a molten metal is poured in a closed state (closed) without being exposed to the air via a hot water distribution pipe.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is directed to a method of pouring molten metal from a melting furnace to a plurality of casting machines via a conveying hot water path comprising a main hot water path and a branch hot water path. A holding furnace which is provided along the branch hot channel and has means for introducing molten metal from the branch hot channel, and a holding furnace movable with respect to the branch hot channel; It is composed of an electromagnetic pump juxtaposed to the furnace, and a hot water distribution pipe liquid-tightly connected from the side wall opening of the holding furnace to the pouring port of the casting machine via the electromagnetic pump.

[0006] In this case, the means for introducing the molten metal from the branch hot water path includes an introduction pipe provided with the holding furnace below the branch hot water path and suspended from the bottom of the branch hot water path into the holding furnace. And a valve that detects the level of the molten metal in the holding furnace and opens and closes the upper end of the introduction pipe at the bottom of the branching metal path. And a siphon tube whose one end is located in the branch hot water path and the other end is located in the holding furnace and is immersed in the molten metal and communicates with the outer periphery of the siphon tube.

[0007] Further, the molten metal is supplied from the melting furnace to the plurality of casting machines via a conveying hot water path comprising a main hot water path and a branch hot water path, and is supplied along the branch hot water paths. An immersion type electromagnetic pump immersed and disposed in the molten metal in the branch hot water passage, a hot water distribution pipe connected from a discharge port of the electromagnetic pump to a pouring port of a casting machine, and a device for the electromagnetic pump. Means for oscillating the electromagnetic pump via a support shaft provided at an upper portion to maintain a connection portion between the hot water distribution pipe and the pouring port of the casting machine in a liquid-tight manner. It is.

[0008]

The molten metal distributed from the melting furnace to the respective branching channels via the main channel is introduced into the holding furnace from the branching channels, and when the electromagnetic pumps juxtaposed to the holding furnace are driven, The molten metal in the holding furnace flows through the hot water distribution pipe and is supplied to the pouring port of the casting machine in a closed state (closed state). In this case, since the holding furnace is made movable, there is no influence of thermal deformation due to the high-temperature molten metal, and the hot water distribution pipe connected to the side wall opening of the holding furnace is constantly liquid-tight to the pouring port of the casting machine. It is guaranteed to be pressed and held.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a first embodiment. In the figure, reference numeral 12 denotes a branch runner, which is a transfer runner called a launder system, which branches from a main runner provided between a melting furnace (not shown) and a plurality of casting machines to correspond to each casting machine. Is formed. Reference numeral 13 denotes a holding furnace, which is disposed below the branch hot water path 12. Reference numeral 14 denotes an introduction pipe, which is connected to the bottom of the branch hot water channel 12 by providing an opening 15, and is suspended in the holding furnace 13 to communicate therewith. Molten branch water path 12
Through the inlet pipe 14 and into the holding furnace 13 for storage. Introducing pipe 14 at the bottom of branching hot water channel 12
The opening 15 connected to the upper end is provided with a valve 16 that is driven to open and close the opening 15, and is opened and closed by a signal from a level sensor 17 that detects the level of the level in the holding furnace 13. The molten metal in the holding furnace 13 is controlled to a constant level by connecting / disconnecting the introduction pipe 14 from the branch hot water path 12 into the holding furnace 13. In the case of FIG. 1, the rod of the valve 16 is connected to the valve opening / closing cylinder 18 to open / close the valve 16, but the valve may be opened / closed by other driving means, for example, an electric motor.

Reference numeral 19 denotes an electromagnetic pump, which is juxtaposed on a bracket projecting from the holding furnace 13 side. Reference numeral 20 denotes a hot water distribution pipe, which is liquid-tightly connected from a side wall port 21 of the holding furnace 13 to a pouring port 22 of the casting machine, and includes a duct 23 of the electromagnetic pump 19 and a mouthpiece 24 connected to the pouring port 22. I have. Wheel 25 and moving cylinder 2 are provided below holding furnace 13.
6 to make it movable, a gap is formed in a portion of the upper surface of the holding furnace 13 where the introduction pipe 14 is inserted, and the space is loosely fitted to be movable with respect to the branch hot water path 12. By cooperating with the sealing cylinder 27 provided, the mouthpiece 24 is pressed against the pouring port 22 of the casting machine to maintain liquid tightness. Holding furnace 13 and hot water pipe 1
It is a matter of course that a well-known means is used in 9 to provide a heating heater at a necessary place and to suppress the drop of the molten metal temperature to a minimum.

In the molten metal supply apparatus thus configured, the molten metal that flows from the melting furnace (not shown) through the main molten metal path and is distributed into the respective branched molten metal paths 12 flows through the opening 15 at the bottom of the branched molten metal path 12. It is introduced into the holding furnace 13 through the introduction pipe 14 and stored. In this case, the level of the molten metal in the holding furnace 13 is detected by a molten metal level sensor 17, and a signal for driving the valve 16 that opens and closes the opening 15 is used to open and close the introduction pipe 14. Is controlled so that the molten metal becomes a constant surface. Then, when a pouring command is issued from the casting machine, the electromagnetic pump 19 arranged in parallel with the holding furnace 13 is driven, and the molten metal of the holding furnace 13 is transferred from the side wall opening 21 to the hot water distribution pipe 20 by the duct 23 of the electromagnetic pump 18 and the mouthpiece. After passing through 24, it flows in a closed state (closed) and is supplied to the pouring port 22 of the casting machine. In addition, an inlet pipe 14 suspended from the bottom of the branch hot water channel 12.
Since there is a gap between the furnace and the holding furnace 13 in a free state in which it can be loosely fitted and moved with a gap, the influence of thermal deformation due to the high-temperature molten metal is eliminated. Further, by cooperating a wheel 25, a moving cylinder 26, and a sealing cylinder 27 provided at a lower portion of the holding furnace 13, the hot water distribution pipe 19 is connected to the pouring port 2 of the casting machine.
2 to keep it liquid-tight.

FIG. 2 shows a second embodiment in which the means for introducing the molten metal from the branching channel of the first embodiment of FIG. 1 is modified. The common portions are denoted by the same reference numerals and the description is simplified, and only different portions will be described. In this embodiment, the holding furnace 33 is different from the case of FIG.
2 are arranged on the sides. Numeral 34 denotes a siphon tube, one end of which is provided in the branch hot water passage 32 and the other end thereof is located in the holding furnace 33, and is immersed in the molten metal and communicated therewith. Therefore, in the second embodiment, since the molten metal is always introduced into the holding furnace 33 from the inside of the branching channel 12 according to the consumption according to the siphon principle, the presence or absence of the molten metal in the branching channel 12 is determined. Is confirmed, the control of the molten metal level in the holding furnace 33 becomes unnecessary, and the means for introducing the molten metal is simpler than in the first embodiment. As described above, the heater is provided on the outer periphery of the siphon tube 34 to keep the molten metal warm.

FIG. 3 shows a third embodiment. In the figure, reference numeral 39 denotes an immersion type electromagnetic pump which is immersed in the molten metal in the branch hot water passage 42 and disposed. Reference numeral 40 denotes a hot water distribution pipe, which connects the discharge port 41 above the electromagnetic pump 39 and the pouring port 22 of the casting machine in a liquid-tight manner. As shown in FIG.
A support shaft 43 is provided on both sides of the upper part of the immersion type electromagnetic pump 39, and a rotating wheel 44 is attached to the support shaft 43, and the wheel 44 is received by a rail 46 provided on a lid portion 45 of the branching runway 42, and electromagnetically. The pump 39 is swingably supported, and the connection between the hot water distribution pipe 40 and the pouring port 22 of the casting machine is kept liquid-tight.
In the case of FIG. 3, the hot water distribution pipe 40 is inclined and connected from the discharge port 41 of the immersion type electromagnetic pump 39 to the pouring port 22 of the vertical injection type casting machine by a substantially straight pipe, as in FIG. 1. Obviously, a mouthpiece 24 may be provided at the tip of the hot water distribution pipe 40 and pressed against the pouring port 22 of the casting machine. The operation as the molten metal supply device in the case of the third embodiment is basically the same as that of the first embodiment described above, and therefore the description thereof is omitted.

[0014]

According to the molten metal supply apparatus according to the present invention described above, the molten metal is supplied from the melting furnace to a plurality of casting machines.
A molten metal is distributed in each branching channel by flowing through a main channel from a melting furnace through a transporting channel called a launder system disposed between the melting furnace and a plurality of casting machines. The electromagnetic pump that is introduced into the holding furnace from the path and is arranged side by side with the holding furnace is driven, flows through the hot water distribution pipe from the side wall opening of the holding furnace holding furnace, and remains closed (closed) to the pouring port of the casting machine. Since the molten metal is supplied, the molten metal is no longer once opened (open) and is not exposed to the air, so that the temperature of the molten metal is lowered, oxides are generated and mixed, and air is introduced into the molten metal. Various phenomena such as entanglement that adversely affect the casting quality can be eliminated. In this case, since the holding furnace is movable, there is no influence of thermal deformation due to the high-temperature molten metal, and furthermore, the distribution pipe connected to the side wall opening of the holding furnace is constantly pressed in a liquid-tight manner to the pouring port of the casting machine. It is guaranteed to hold.

[0015] Further, without holding the holding furnace in the branch hot water path,
By immersing the immersion type electromagnetic pump directly in the branch hot water path and oscillatingly supporting and arranging it, it becomes a molten metal supply device having the same function as above, and it is possible to provide a simpler configuration. There are advantages.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing a first embodiment of a molten metal supply device according to the present invention.

FIG. 2 is a schematic configuration diagram showing a second embodiment of the molten metal supply device according to the present invention, which is a modification of the first embodiment.

FIG. 3 is a schematic configuration diagram showing a third embodiment of the molten metal supply device according to the present invention.

4 is a view as viewed in the direction of the arrow Z in FIG. 3;

FIG. 5 is a schematic configuration diagram showing an example of a conventional molten metal supply device.

[Explanation of symbols]

 12, 32, 42 Branch hot water path 13, 33 Holding furnace 14 Introducing pipe 16 Valve 19 Electromagnetic pump 20, 40 Hot water distribution pipe 22 Pouring port of casting machine 25 Wheel 26 Cylinder for movement 27 Cylinder for sealing 34 Siphon pipe 39 Immersion type electromagnetic Pump 43 Support shaft 44 Wheel 46 Rail

Continuation of the front page (56) References JP-A-64-15272 (JP, A) JP-A-6-87061 (JP, A) JP-A-48-78032 (JP, A) JP-A-6-238429 (JP) JP-A-63-93465 (JP, A) JP-A-64-15273 (JP, A) JP-A-6-87062 (JP, A) JP-A-3-42363 (JP, U) JP-A 60-69582 (JP, U) Japanese Utility Model Showa 62-123353 (JP, U) Japanese Utility Model 3-11452 (JP, U) Japanese Utility Model 6-29763 (JP, U) Japanese Utility Model 3-4355 (JP, U) U) (58) Field surveyed (Int. Cl. ⁷ , DB name) B22D 35/00 B22D 17/30 B22D 35/04

Claims (1)

(57) [Claims] 1. A molten metal supply provided along a branching hot water passage so as to pour molten metal from a melting furnace to a plurality of casting machines through a conveying hot water passage including a main hot water furnace and a branching hot water passage. A holding furnace having means for introducing the molten metal from the branching channel, a holding furnace movable with respect to the branching channel, an electromagnetic pump juxtaposed to the holding furnace, and a side wall opening of the holding furnace. A hot water supply pipe connected to a pouring port of the casting machine through an electromagnetic pump in a liquid-tight manner, and a means for introducing molten metal from the branch hot water path is provided with the holding furnace below the branch hot water path. An inlet pipe hanging down from the bottom of the branch channel into the holding furnace, and a valve for detecting the level of the molten metal in the holding furnace and opening and closing the upper end of the inlet pipe at the bottom of the branch channel. A molten metal supply device, characterized in that: