JPH09108823A - Method for pouring molten metal and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a molten metal pouring method which can effectively pour molten metal into a sprue arranged an arbitrary fixed position of a mold flask, and a device therefor by holding the positional relation (L, H) between the dropping starting point of the molten metal poured from the pouring hole of a ladle and the sprue of the mold flask through the molten metal pouring work by tilting the sector-form ladle. SOLUTION: The sector-form ladle 1 holding the molten metal is tilted with a driving means providing a sector gear 3 to pour the molten metal into the mold flask. At this time, the sector-form ladle 1 is made to be possible to tilt while using the molten metal pouring center set at the molten metal dropping starting point or near this point of the pouring hole 2 of the ladle as a ladle tilting center O1 , and the sector gear 3 has the turning center O2 at the different position to the ladle tilting center O1 of the sector-form ladle 1. Then, the sector- form ladle 1 is tilted while centering the ladle tilting center O1 by driving with the sector gear 3 which turns while centering the turning center O2 .

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention generally relates to a casting technique, and in particular, a mold is formed by tilting a ladle having a fan-shaped vertical cross section, that is, a fan-shaped tribe by a driving means. The present invention relates to a pouring method and device for pouring molten metal into a frame, in which a positional relationship (L, H) between a start point of molten metal overflowing from a ladle spout and a mold frame spout is constant during pouring work by tilting the ladle. The present invention relates to a pouring method and device capable of pouring molten metal into a sprue formed at an arbitrary fixed position of a mold frame.

[0002]

2. Description of the Related Art Conventionally, in a foundry, the work of pouring molten metal into a mold frame has been done by skilled workers who have long experience. That is, the molten metal was loaded from a melting furnace into a ladle having a tap hole at the upper end of a generally cylindrical shape, and was transported to a position where the pouring section, that is, the mold frame is arranged. Since the ladle is usually supported by the suspending means, it is necessary for an operator to rotate and tilt the ladle and inject the molten metal into the sprue of the mold frame. At this time, the spout of the ladle and the sprue of the mold frame are provided at a distance, and this distance fluctuates with the inclination of the ladle. Further, the surface area of the molten metal in the tribe fluctuates with the inclination of the ladle, and when the ladle is inclined at a constant speed, the amount of molten metal gradually changes. Therefore, the operator adjusts the positional relationship of the ladle outlet with respect to the mold frame gate and the tilt rotation angle of the ladle in order to correct the variation in the distance between the tap hole of the ladle and the mold frame gate and the variation in the pouring amount. The adjustment work must be done at the same time while observing the hot water flow curve. As described above, these operations are extremely difficult and require a high level of technology, and at the same time, extremely dangerous.

In view of the above points, the applicant of the present application has proposed
2-9580 and FIGS. 7 and 8 of the present application.
As shown in Fig. 2, a ladle having a fan-shaped vertical cross-section through the tap hole 2 is used so that the surface area (S = S ₁ + S ₂ ) of the molten metal in the ladle 1 during pouring is approximately constant. The proposed pouring method was proposed. In the fan-shaped tribe pouring method, the positional relationship between the molten metal drop start point of the spout 2 and the mold frame sprue 100c is always kept constant, that is, L and H (FIG. 8) are varied, regardless of the rotation angle of the tribe 1. Without, the molten metal pouring streamline T between the fan-shaped tribute 1 and the mold frame gate 100c
It has the feature that the molten metal can be poured without change.

[0004]

However, conventionally,
The sector-shaped trolley 1 is driven by integrally arranging the sector gear 3 on the side wall of the sector-shaped trolley 1 and driving the sector gear 3 by the drive gear 4. Therefore, the center of rotation of the sector gear and the center of rotation of the fan-shaped tribe were located on the same rotation axis O ₁ .

Therefore, in the vicinity of the pouring port 2 of the fan-shaped tribe,
The rotation support shaft and related mechanisms are arranged in a concentrated manner, which makes it difficult to arrange the mold frame 100 very close to the fan-shaped trowel 1, and normally the mold frame gate 100c is located around the mold frame 100. That is, it was formed in the peripheral portion of the mold frame close to the fan-shaped tribe 1.

However, for example, when it is desired to cast four products at the same time in one mold frame 100, in terms of forming the runners in the mold frame 100, the quality of the cast product is extended. From this point, it is extremely preferable to form the mold frame gate 100c at the center of the mold frame 100.

Therefore, in such a case, in the conventional case, as shown in FIG. 9, an intermediate gutter is provided between the fan-shaped trowel 1 and the mold frame 100 in order to form the mold frame gate 100c at the center of the mold frame 100. 200 is arranged, the fan-shaped trolley 1 is rotated and tilted about its rotation support shaft, the molten metal from the fan-shaped trolley 1 is first fed to the intermediate gutter 200, and then poured into the sprue 100c of the mold frame 100. I had no choice but to adopt the method. Such a method is
There is a problem that the pouring temperature is lowered, defective products are generated due to the disturbance of the streamline due to sticking of glue, and the maintenance and replacement work of the intermediate gutter 200 are forced.

Therefore, an object of the present invention is to provide a positional relationship (L, L) between the falling start point of the molten metal overflowing from the outlet of the ladle and the mold gate through the pouring work by tilting the fan-shaped ladle.
H) is kept constant, and a pouring method and device capable of efficiently pouring the molten metal into a sprue set at an arbitrary fixed position of the mold frame.

Another object of the present invention is to maintain a constant positional relationship (L, H) between the start point of the molten metal overflowing from the outlet of the ladle and the mold gate through the pouring work by tilting the fan-shaped ladle. It is an object of the present invention to provide a pouring method and device capable of pouring a mold frame spout at the center of the mold frame.

[0010]

The above objective is fully achieved by the present invention. In summary, the present invention relates to a pouring method of pouring a fan-shaped ladle holding molten metal into a mold frame by inclining the fan-shaped ladle holding the molten metal by a driving means. or it is tiltable for pouring center which is set in close proximity thereto as ladle rotation center O _1, wherein the drive means includes a sector having a center of rotation O ₂ at a position different from the ladle rotation center O ₁ of the fan-shaped ladle The sector-shaped tribe includes a gear and is driven by the sector gear when the sector gear rotates about its rotation center O ₂ and tilts around the tribe rotation center O ₁ to discharge hot water. This is the pouring method. Preferably, the fan-shaped tribe is movably supported on the sector gear on the side opposite to the tap hole, and the sector gear is rotated about its rotation center O ₂ to rotate the tribe rotation center O ₁ Is rotated in the same direction as the sector gear.

According to another aspect of the present invention, the fan-shaped ladle holding the molten metal and the fan-shaped ladle are set at the molten metal drop start point at the tap opening of the ladle or in the vicinity of the tribe rotation center O. ₁ and a rotation center O ₁ different from the rotation center O _{1 of the} fan-shaped tribe.
_The driving means provided with a sector gear rotatably attached to the tribe holding device around ₂ and the fan-shaped tribe are relatively movable with respect to the tribe support shaft on the side opposite to the pouring port. Carrying means for carrying the gear on the gear, and by urging the driving means to rotate the sector gear about its rotation center O ₂ , its rotational force is transferred via the carrying means. A pouring device is provided, which is transmitted to a fan-shaped tribe and tilts around the tribe rotation center O ₁ to discharge the hot water. Preferably, the carrying means is composed of a tribe receiving roller provided on the sector gear side and a support arm provided on the fan-shaped tribe side and mounted on the tribe receiving roller, or The carrying means can be formed by a supporting roller rotatably provided on a side portion of the fan-shaped tribe and an upper end surface of the sector gear for carrying the supporting roller.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Next, a pouring method and apparatus according to the present invention will be described with reference to the drawings.

1 to 4 show an embodiment of the pouring device of the present invention. With particular reference to FIGS. 2 to 4, in the present embodiment, the pouring device includes a ladle 1 and a holding device 10 that holds the ladle 1. In the present embodiment, the holding device 10 is a frame structure that defines a space portion in which the ladle 1 can be arranged, and the ladle 1 is held inside thereof so as to be tiltable about its rotation axis. In the present embodiment, the ladle 1 is, as shown in FIGS. 2 and 4,
A fan-shaped tribe whose longitudinal cross-section is roughly fan-shaped, is capable of storing a predetermined amount of molten metal, and a crow which is communicated with this molten metal reservoir 1A and which corresponds to a fan-shaped main portion. It has a tap 2 called a mouth. In the present embodiment, the center of rotation of the ladle O ₁ is set at or near the start point of molten metal drop at the tip of the tap hole 2. Therefore, the inner surface of the rear wall of the fan-shaped ladle 1 is centered around this center of rotation O _1. It is formed in a shape with a radius R.

A support arm 5 is provided on the fan-shaped tribe 1 so as to project outward from the rear wall for the purpose described later. In this embodiment, the support arms 5 are arranged at two positions in the width direction of the tribe within the same horizontal plane. A support plate 6 is integrally fixed to the side wall of the fan-shaped trolley 1 on the side of the tap hole 2 and has an opening downward at the front end (referred to as the tap hole 2 side). Bearing notch 6a
(FIG. 3) is formed. On the other hand, the support wheels 7 for carrying the trolley 1 are rotatably fitted to the support shafts 7a mounted so as to project from the frames on both sides of the frame structure constituting the trolley holding device 10 toward each other by a predetermined distance. It is equipped. The bearing notch 6 a of the tribe support plate 6 is mounted on the support wheel 7 from above the support wheel 7. The axis of rotation of the bearing notch 6a and the support wheel 7 is aligned with the center of rotation O _{1 of the} tribe.

Further, in the present embodiment, the sector gears 3 are arranged adjacent to both sides of the fan-shaped trolley 1 and inside the frame structure of the trolley holding device 10. As shown in FIG. 4, a rotary shaft 12 is provided at a main part of the rotation center of the sector gear 3 so as to project to the side thereof, and is rotatable by a bearing 13 provided at a side frame of the frame structure. Is carried by. The sector gear 3 also meshes with a drive gear 4, which also extends laterally at the rear end of the side frame and is rotatably attached to the frame structure via bearings 14. It is fixed to the arranged support shaft 15. The frame structure 10 is provided with a drive motor M, and the drive force from the drive motor M is provided in parallel with the drive gear 4 via a transmission mechanism 17 such as a belt or a chain and is applied to the support shaft 15. It is transmitted to the drive gear 4 by driving the fixed pulley 18.

[0016] Incidentally, according to the present invention, the rotation center O ₁ of the fan-shaped ladle, although the adjacent to the rotational center O ₂ of the toothed sector 3, are set at different positions. This will be described in detail later.

Further, according to the present embodiment, the connecting shaft 20 is provided by connecting the two sector gears 3 with each other.
The tribe receiving roller 21, which is rotatable in two positions in this embodiment, is arranged at an arbitrary position on 0. The tribe receiving roller 21 serves to carry the support arm 5 arranged so as to project outward from the rear wall of the tribe 1. That is, the tribe receiving roller 21 and the support arm 5
Means that the fan-shaped trowel 1 is movable relative to the trowel support shaft 7a on the side opposite to the pouring port 2 in the sector gear 3
A carrier means for supporting the carrier is constructed.

In the present embodiment, the trove holding device 10 is
The first trolley structure is provided with the rotating wheel 25 at the bottom of the frame structure, moves on the rail 26 installed below, and each mold frame 100 on the mold line laid out adjacent to the pouring device. It is configured so that the position can be changed in the front-back direction by contacting with and separating from. Further, in this embodiment, the rail 26 is also installed on the second carriage 30. The rotating wheel 31 of the second carriage 30 is movable on a rail 32 laid along the mold line.

According to the pouring device having the above structure, for example, when the molten metal in the trolley 1 is consumed, the first trolley, that is, the trolley holding device 10 is moved backward from the molding line to replenish the molten metal. By moving to the position and lifting the trolley 1 upward, it can be detached from the pouring device and independently transported to the molten metal replenishing position. Also, when mounting on the pouring device, move it from above into the pouring device,
Align the bearing notch 6a of the support plate 3 with the support shaft 7,
The support arm 6 can be mounted by placing it on the tribe receiving roller 6a.

Next, the pouring method of the present invention carried out by the pouring device having the above-mentioned structure will be described mainly with reference to FIG.

The first and second carriages 10 and 30 are controlled and driven to set the pouring device at a predetermined position with respect to the mold frame 100. At this time, the fan-shaped trolley 1 full of molten metal is in a substantially horizontal state, as shown in FIG.

Next, when the drive motor M is energized and the drive torque is transmitted to the sector gear 3 via the drive transmission mechanism 17 and the drive gear 4, the sector gear 3 rotates around its rotation center as shown in FIG. Rotate counterclockwise at 2. Due to the rotation of the sector gear 3, the support arm 5 of the fan-shaped tribe 1 is pushed upward by the tribe receiving roller 21, so that the tribe 1 is also rotated, tilted, or tilted about its rotation center. It As a result, the molten metal in the trowel 1 overflows from the tap hole 2, draws a predetermined pouring stream line T, and is poured into the spout 100c of the mold frame 100. That is, according to the present invention, the positional relationship between the molten metal drop start point at the tip of the tap hole 2 and the mold frame tap 100c is maintained constant by the tilting of the trowel 1 despite the movement of the trowel 1. .

That is, in the present embodiment, the center of rotation O ₁ of the fan-shaped trolley 1 is located at a position different from the molten metal drop start point and close to the molten metal drop start point, that is, at the bottom wall portion of the tap hole 2. However, in the present embodiment, since the surface shape of the bottom wall of the tap hole 2 is formed to have a radius r centering on the rotation center O ₁ , the tip of the tap hole 2 is set. The positional relationship between the molten metal drop start point and the mold frame gate 100c is maintained substantially constant.

According to the invention, the rotation center O ₂ of the sector gear 3, is set at a position different from the rotation center O ₁ of the fan-shaped ladle 1. That is, in this embodiment, the rotation center O ₁ of the trowel ₁ is located at the position (L
₁ , H ₁ ), and the center of rotation O _{2 of the} sector gear 3
Is the position (L ₂ , H
₂ ) and the rotation center O of the sector gear 3 in FIG.
_It is located diagonally below and to the right of ₂ , and is the center of rotation O _{2 of the} sector gear 3.
It is located at a position closer to the tap hole 2 of the mold 1 than.

Therefore, the lobes of the tribe receiving roller 21 of the sector gear 3 and the supporting arm 5 of the tribe 1 are different from each other, so that the initial contact position C between the tribe receiving roller 21 and the supporting arm 5 is shown in FIG. ₀ is the sector gear 3
Becomes as moving the ladle receiving roller 21 is arcuate trajectory R ₂ above to follow, for the supporting arm 5 of the ladle 1, because the initial contact position C ₀ is moving along an arcuate trajectory R _1, On the support arm 5, the contact position between the tribe receiving roller 21 and the support arm 5 is the initial contact position C _0.
To the contact position C _{1 that} varies with the rotation of the trolley 1. That is, the contact position between the tribe receiving roller 21 and the support arm 5 is determined by the sector gear 3 and the tribe 1
Moves with the rotation of.

In the above embodiment, the fan-shaped tribe holding means is
The structure is such that the tribe receiving roller 21 is arranged on the sector gear 3 side and the support arm 5 is provided on the fan-shaped tribe 1 side, but the present invention is not limited to this, and, for example, FIGS. As shown in FIG. 3, a support shaft 35 fixed to the side of the fan-shaped trolley 1 is provided with a support roller 35 rotatably provided.
It is also possible to adopt a structure in which it is placed on the upper end surface 3A of the.

In addition, the ladle carrying means of the above-mentioned embodiment is for making the fan-shaped ladle 1 easy to remove upward from the pouring device, but the present invention is not limited to this. Instead of the above, any structure may be used as long as the supporting portions of the fan-shaped tribe 1 and the sector gear 3 have a structure capable of relatively moving as the two rotate.

[0028]

As described above, according to the pouring method and apparatus of the present invention, when the fan-shaped trolley holding the molten metal is tilted by the driving means to pour it into the mold frame, the fan-shaped trolley is used. Is tiltable about a molten metal falling start point of the tap opening of the tribe or a tapping center set in proximity to the tapping point as a center of rotation of the ladle O ₁ , and the driving means is rotated by the center of rotation of the ladle O _{1 of the} fan-shaped ladle. A sector gear having a rotation center O ₂ in a position different from that of the sector gear, and the sectoral tribe is driven by the sector gear to rotate about the rotation center O ₂ to drive the tribe rotation center O 2. Since it is configured to tilt around ₁ and to discharge the hot water, the start point of the pouring stream line that overflows from the hot water outlet of the ladle and the mold frame hot water through the pouring work by tilting the fan-shaped ladle. The positional relationship (L, H) with the mouth can be kept constant, and the molten metal can be efficiently poured into the sprue set at an arbitrary fixed position of the mold frame, for example, the center part of the mold frame.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating the principle of a pouring method according to the present invention.

FIG. 2 is a vertical sectional view of an embodiment of a pouring device according to the present invention.

FIG. 3 is a side view of the pouring device according to the present invention taken along line III-III in FIG.

FIG. 4 is a plan view of the pouring device according to the present invention.

FIG. 5 is a side view of another embodiment of the pouring device according to the present invention similar to FIG.

FIG. 6 is a plan view of the pouring device shown in FIG.

FIG. 7 is a perspective view of a fan-shaped trolley for explaining a pouring method using a conventional fan-shaped trolley.

FIG. 8 is a sectional view of a fan-shaped trolley for explaining a pouring method using a conventional fan-shaped trolley.

FIG. 9 is a cross-sectional view of a fan-shaped trolley for explaining another example of the pouring method using the conventional fan-shaped trolley.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fan-shaped tribe 2 Tribe outlet 3 Sector gear 4 Drive gear 5 Tribe receiving roller 10 Tribe holding device 21 Support arm 35 Support roller 100 Mold frame 100c Mold frame gate

Claims (5)

[Claims] 1. In a pouring method for pouring molten metal into a mold frame by tilting a fan-shaped ladle holding the molten metal with a driving means, the fan-shaped ladle is a molten metal drop starting point or a molten metal drop start point of the molten metal. Is tilted around the hot spring center O ₁ as the center of rotation of the ladle, and the drive means is provided with a sector gear having a center of rotation O ₂ at a position different from the center of rotation O ₁ of the fan-shaped tribe. In the fan-shaped tribe, when the sector gear rotates about its rotation center O ₂ , the sector gear is driven by the sector gear and tilted about the tribe rotation center O ₁ to discharge hot water. Method. 2. The fan-shaped tribe is movably supported on the sector gear on the side opposite to the tap hole, and the sector gear is rotated about its rotation center O ₂ to rotate the tribe rotation center. The pouring method according to claim 1, wherein the sector gear is rotated about O ₁ in the same direction as the sector gear. 3. A fan-shaped ladle holding the molten metal, and the fan-shaped ladle are arranged so as to coincide with a molten-metal drop start point at a tap of the ladle or a tribe rotation center O ₁ set in the vicinity thereof. A tribe holding device that holds a tiltable and rotatable via a support shaft, and a sector gear that is attached to the tribe holding device so as to be rotatable around a rotation center O ₂ different from the tribe rotation center O ₁ of the fan-shaped tribe. The driving means, and a carrying means for carrying the fan-shaped tribe on the sector gear so as to be relatively movable with respect to the tribe support shaft on the side opposite to the pouring port. by the sector gear is rotated about its rotation center O ₂ was energized, the rotational force is transmitted to the fan-shaped ladle through said bearing means, said fan ladle its ladle Rolling the center O ₁ tilts around pouring device, characterized in that the tapping. 4. The carrying means includes a tribe receiving roller provided on the sector gear side and a support arm provided on the fan-shaped tribe side and mounted on the tribe receiving roller. 3 pouring equipment. 5. The supporting means is formed of a supporting roller rotatably provided on a side portion of the fan-shaped tribe and an upper end surface of the sector gear for supporting the supporting roller. Pouring equipment.