JPH0129622B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a method for switching the flow path of molten metal.

(Prior Art) Generally, in casting, when pouring molten metal in a ladle into each mold, the ladle is tilted each time the ladle is poured and then returned.

(Problems to be solved by the invention) This increases the number of times the ladle is tilted, which takes time, and the temperature of the molten metal in the ladle tends to drop, making it easy for casting defects to occur due to the temperature of the molten metal. .

In addition, when returning the ladle, if the molten metal does not flow well at the tap opening of the ladle and pouring the molten metal with high precision is desired, advanced control technology must be applied to the tilting of the ladle.

The present invention has been developed in view of these points, and it is possible to instantly switch the flow path of the flowing molten metal and to enable continuous pouring of the ladle, thereby simplifying the pouring work. The purpose is to improve efficiency and prevent casting defects, and to achieve accurate quantitative pouring by improving the flow of the molten metal when changing the molten metal flow path.

[Structure of the invention]

(Means for Solving the Problems) The present invention provides a branch portion 5 located at the top of a mountain-shaped cross section.
Opposing molten metal channels 55, 5 separated by 4
A method for switching a molten metal flow path using a flow path switching body 46 having a molten metal flow path 55 provided in a downwardly inclined manner. This is a molten metal flow path switching method in which the molten metal passes through the branch portion 54 and falls into the molten metal flow path 56 on the other side by displacing the flowing molten metal relative to the flowing molten metal.

(Function) In the present invention, by shifting either the flow path switching body 46 or the flowing molten metal falling onto the flow path switching body 46, the branching section Molten metal flow path 5 by 54
5 and 56 and continue pouring into another mold. At this time, the molten metal flow path is quickly switched by the branching part 54, and the flow rate of the poured metal does not gradually change at the time of switching, and a constant molten metal guide path is ensured by the downwardly inclined molten metal flow paths 55 and 56. Ru.

(Example) Next, an example of the present invention will be described based on FIGS. 1 to 4.

A support column 1 is erected and fixed on a floor surface, and the upper and lower bearing parts 2 and 3 of this support column 1 have a vertical rotation shaft 4 and a horizontal arm 5 integrally provided at the upper and lower ends of this rotation shaft 4.
A support part 7 on one side is integrally provided above the tip of the arm 6, and a motor 9 is fixed to the lower part of the arm 5 via a mounting frame 8. 9 rotating screw shaft 11
The upper part of the square frame-shaped support part 12 is screwed together.

Further, a ladle 13 is arranged and attached between the support part 7 on one side and the support part 12 on the other side. That is,
A tilting support shaft 14 integrally protruding from both sides of the ladle 13 is rotatably fitted into a bearing portion 16 on the lower surface of the members 15 on both sides, and the members 15 on both sides protrude outward from the upper surface. It is fixed to the supporting parts 7 and 12 on both sides via the provided mounting plate 17. The side cross section of the ladle 13 is formed into a fan shape with the tilting support shaft 14 as the center of a constant radius, and two tap holes 18 are provided at the front opening edge of the upper surface of the ladle 13.

Further, a support part 21 is fixed to the outside of the support part 7 on one side at a parallel interval, and a fan-shaped plate 22 is arranged between the support parts 7 and 21 to support the support shafts 23 on both sides of the fan-shaped plate 22. Bearing portion 24 on the lower surface of portions 7 and 21,
25 to hold it rotatably. This fan-shaped plate 22 is formed into a fan shape similar to the side cross section of the ladle 13, with the support shaft 23 part being the center of a constant radius, and the support shafts 23 on both sides are connected to the tilting support shaft 14 of the ladle 13. Place it concentrically. Further, a push-up piece 26 is provided protruding from the inner surface of the fan-shaped plate 22 toward one side of the ladle 13, and an engaging convex portion is provided from one side of the ladle 13 toward the upper surface of the push-up piece 26. 27 is installed protrudingly.

Further, a mounting frame 31 is fixed to the arm 6 and the supporting parts 7 and 21, and a hydraulic cylinder 32 is arranged inside the mounting frame 31. This hydraulic cylinder 3
2 has a piston rod 33 facing downward, the tip of the piston rod 33 being rotatably attached to the lower end of the mounting frame 31, and a hydraulic cylinder 32
A chain 35 is connected to the base end of the fan-shaped plate 22 via an expansion/contraction adjustment part 34, and this chain 35 is wound around a sprocket foil 36 that is rotatably supported on the upper end of the mounting frame 31. It is stretched along the concave groove on the outer circumferential surface, and the tip is the lower end stopping part 37 of the fan-shaped plate 22.
Connect to.

Then, the rotation shaft 4 and the horizontal arm 5,
6 by a predetermined angle, the ladle 13
is retracted from the mold conveyance line so that unnecessary molten metal in the ladle 13 can be disposed of, and the support part 7 on one side of the fixed position is connected to the support part 12 on the other side to the rotating screw shaft 11 of the motor 9. Therefore, by adjusting the vertical movement, the relative flow rate of the molten metal flowing out from the two tap holes 18 is adjusted, and by contracting the hydraulic cylinder 32 at a constant speed, the fan-shaped plate 22 is adjusted. The ladle 13 is rotated upward at a constant speed via the ladle 13, and since the ladle 13 is fan-shaped with the tilting support shaft 14 as the center of a constant radius, the volume at a level below the tap 18 decreases at a constant speed. , ladle 13
The molten metal flows out from each outlet 18 at a constant flow rate.

Next, a support portion 41 is attached to the lower surface of the member 15 on one side.
At the same time, the support part 42 is fixed to the lower surface of the support part 12 on the other side, and the support part 42 on both sides is fixed.
A holder 43 is provided to span between 1 and 42, and the two tap holes 18 of the ladle 13 are connected to this holder 43.
Two funnels 44 are attached correspondingly to the support parts 41 and 42 on both sides, and support pieces 45 are provided inwardly protruding from the lower portions of the support parts 41 and 42 on both sides. By fitting the slide groove 47, the flow path switching body 46 is supported so as to be movable forward and backward relative to the ladle 13. Further, a support part 48 is fixed from the support part 12 to the front of the flow path switching body 46, and the base end of a hydraulic cylinder 49 is pivotally attached to the inner surface of the distal end part of the support part 48, and the piston rod of this hydraulic cylinder 49 is fixed. Connecting rods 52 are pivotally attached to both ends of the connecting rods 51, and the ends of the connecting rods 52 on both sides are fixed to the front surface of the flow path switching body 46.

The flow path switching body 46 is formed in a chevron shape, and a central branch portion 54 located at the top of the chevron cross section and a branch portion 54 are formed at positions corresponding to the two funnels 44 in the flow path switching body 46. Molten metal flow channels 55 and 56 are formed at left and right positions, respectively, so as to be inclined downwardly in a concave manner.

Further, the conveying base 61 connected to the mold conveying line in series is arranged to intermittently face below the flow path switching body 46. Each of these transport bases 61
is conveyed by a chain conveyor, and four molds 62 are provided at the left and right front and back positions, and the conveyance base 61 is intermittently stopped so that the left and right positions of the molds correspond to the molten metal flow paths 55 and 56. Position.

Then, the hydraulic cylinder 49 is telescopically operated to move the flow path switching body 46 in the left-right direction in FIG.
4 is shifted in the left-right direction with respect to directly below the funnel 44, the falling position of the molten metal flowing out from the ladle 13 and passing through the funnel 44 due to the tilting of the ladle 13 is as follows.
The molten metal flow paths 55 and 56 on both sides are switched from one side to the other side.

For example, as shown in FIG. 4a, by moving the flow path switching body 46 to the right side,
The molten metal is dropped into the molten metal channel 55 on the left side and poured into the mold _62a on the left side, and when a certain amount of molten metal is poured into the mold _62a on the left side, the molten metal overflowing from this mold _62a is radiated. Detected with a thermometer etc.
As shown in FIG. b, the molten metal flow path is switched by moving the flow path switching body 46 to the left, and the molten metal is dropped into the molten metal flow path 56 on the right side, and poured into the mold 62 _b on the right side. Let's do it. When a certain amount of molten metal is poured into the mold _62b on the right side, the hydraulic cylinder 32 is extended and the ladle 13 is rotated downward to temporarily stop pouring, and the mold conveyance line is intermittently driven. The transfer base 61 of the next mold is positioned below the flow path switching body 46, and the above operations are repeated.

In this embodiment, the falling position of the flowing molten metal was switched from the molten metal flow path 55 on one side to the molten metal flow path 56 on the other side by displacing the flow path switching body 46, but instead of this method, , flow path switching body 46
may be fixed at a fixed position, and the flowing molten metal falling onto the flow path switching body 46 may be displaced. For example, as shown in FIG. 5, a moving funnel 72 having a receiving groove 71 of a predetermined width in the moving direction is provided above the flow path switching body 46, and the outlet 73 of this moving funnel 72 is connected to the flow path switching body 46. Even if the molten metal flow path 55 is moved from above the molten metal flow path 55 on one side of the body 46 to above the branch portion 54 and above the molten metal flow path 56 on the other side, the same molten metal flow path switching can be performed in the results shown in FIG. .

Further, the support structure for the funnel 44 and the flow path switching body 46 may be provided independently from the support structure for the ladle 13. For example, as shown in FIG. 6 and FIG.
A support part 81 independent from the support part 3 is provided, and two rows of upper and lower rollers 8 are provided on each of the support parts 81 on both sides.
2, 83 are provided, and two rows of rollers 82, 83 on both sides are provided.
83 movably clamps the convex portions 84 on both sides of the flow path switching body 80, and two sets of hooks 85 are provided downwardly from the mounting portions of the rollers 83 on both sides. Four funnels 87 located below the flow path switching body 80 are engaged via two sets of holders 86, and the molds 62 of the mold conveyance line are positioned below each funnel 87 in a corresponding manner. Further, a hydraulic cylinder 88 is provided at the base of the support portion 81, and a piston rod 89 of this hydraulic cylinder 88 is provided.
is connected to the flow path switching body 80. Further, the hydraulic cylinder 88 is supported horizontally by a receiving portion 91.
In the case of this modification, if the members 15 of the bearings 16 on both sides of the ladle 13 are removably attached to the support parts 7 and 12 on both sides, the ladle 13 can be easily installed independently of the fan-shaped plate 22. It can be removed and therefore easily replaced with another ladle of different volume or shape.

Note that the mold 62 may be a sand mold or a metal mold.

〔Effect of the invention〕

As described above, according to the present invention, when pouring metal from a ladle into a mold, for example, by horizontally displacing the flowing molten metal and the flow path switching body relatively, the molten metal is poured into the flow path switching body. Since the molten metal flow path on one side is switched to the molten metal flow path on the other side, it is possible to continuously pour metal from the mold on one side to the mold on the other side without stopping the pouring from the ladle. As a result, the number of times the ladle is tilted is reduced, improving the efficiency of the pouring operation, and the temperature of the molten metal in the ladle does not drop, making it possible to prevent casting defects due to this temperature drop. Furthermore, since the flow path switching body is formed by descending a plurality of molten metal flow paths separated by branch portions, the molten metal flow paths can be quickly switched by the branch portions, and the molten metal flow paths can be quickly switched by the branch portions. The flow rate is clear and the pouring flow rate does not gradually change when switching, making it easy to pour accurately and in a fixed amount. Further, the downwardly inclined molten metal flow path allows a constant molten metal guide path to be ensured, and can also be used with small sprues of molds.

[Brief explanation of drawings]

Fig. 1 is a front view showing an embodiment of the flow path switching method of the present invention, Fig. 2 is a side view thereof, Fig. 3 is a plan view of the main part thereof, and Fig. 4 is a side cross-section explaining its operation. 5 is a side sectional view showing another embodiment of the present invention, FIG. 6 is a side view showing another embodiment of the main part thereof, and FIG. 7 is a sectional view taken along the line -- of FIG. 6. . 13... Ladle, 46... Channel switching body, 54...
...Branch portion, 55, 56... Molten metal channel, 62... Mold.

Claims (1)

[Claims] 1. A method for switching molten metal flow paths using a flow path switching body having opposing molten metal flow paths separated by branch portions located at the top of a mountain-shaped cross section in a downwardly sloping manner, in which the molten metal on one side of the flow path switching body is The molten metal falling into the flow path is caused to pass through the branch part and fall into the molten metal flow path on the other side by relatively displacing the flow path switching body and the flowing molten metal. molten metal flow path switching method.