JPH08267180A - Semi-continuous casting method and mold supporting carriage for semi-continuous casting apparatus - Google Patents

Abstract

PURPOSE: To lengthen the length of the obtd. ingot without changing the depth of a pit and the ascending/descending stroke of a bottom mold by pouring molten metal into a mold, ascending a mold supporting body after the bottom mold reaches the descending position and the solidification of the molten metal in the mold completes, and taking out the upper end part of the cast ingot from the mold. CONSTITUTION: The pouring of the molten metal into each mold 3 from a casting trough 7 is started. The poured molten metal in the mold 3 is cooled from this periphery and solidified from the lower part in the mold 3 to form the cast ingot 1. Successively, the bottom mold 5 is descended by descending a casting table 6, and the ingot 1, in which the solidification at the lower part in the mold 3 completes, is drawn out downward from the inner part of the mold 3 at the constant speed. The pouring of the molten metal is executed so that the upper part of the ingot 1 remains in each mold 3 even after the bottom mold 5 reaches the descending position. Then, after the bottom mold 5 reaches the descending position and the solidification of the molten metal in each mold 3 completes, the upper end part of each cast ingot 1 is remained in each mold 3, and the mold holding body 4 is ascended to take out the upper end part.

Description

Detailed Description of the Invention

The present invention relates to a semi-continuous casting method for casting an aluminum or aluminum alloy ingot such as a rolling slab or an extrusion billet, and a semi-continuous casting apparatus in which a plurality of casting molds are held in a rectangular shape. The present invention relates to a mold support carriage that supports a holder.

[0002]

2. Description of the Related Art A conventional semi-continuous casting method is carried out by using a semi-continuous casting apparatus in which a mold holder holding a plurality of molds is supported by a mold supporting carriage.
In this semi-continuous casting apparatus, the mold support carriage is designed to run on rails provided on both sides of a pit where an elevating body for holding and elevating the bottom die is arranged.
After the casting, it can be moved from the pit to take out the ingot or replace the mold.

Semi-continuous casting is performed as follows. That is, the injection of the molten metal is stopped before the bottom die reaches the lowered position, and after the solidification of the molten metal in the mold is completed, the bottom die is lowered to the lowered position and the upper end of the ingot is taken out of the mold, The mold support cart is moved after the bottom mold reaches the lowered position.

[0004]

However, in the conventional semi-continuous casting apparatus equipped with the mold supporting carriage and the semi-continuous casting method using this apparatus, the carriage is only after the ingot is completely removed from the mold. However, when the pit depth and the bottom die raising / lowering stroke are constant, the length of the ingot to be manufactured cannot be lengthened, resulting in poor productivity. Further, in order to increase the length of the ingot, it is necessary to increase the depth of the pit and increase the lifting stroke of the bottom die, which causes a problem of cost increase.

An object of the present invention is to provide a semi-continuous casting method and a mold support carriage for a semi-continuous casting apparatus that solve the above problems.

[0006]

According to the semi-continuous casting method of the present invention, when casting is performed using a semi-continuous casting apparatus in which a mold holder having a plurality of molds held by a mold support carriage is supported, After the molten metal is injected into the mold so that the upper end of the ingot remains in the mold even after the mold reaches the lowered position, the bottom mold reaches the lowered position and after the solidification of the molten metal in the mold is completed It is characterized in that the mold holder is raised and the upper end of the ingot is taken out of the mold.

A mold supporting carriage for a semi-continuous casting apparatus according to the present invention is a mold supporting carriage for supporting a mold holder that holds a plurality of molds in the semi-continuous casting apparatus, and includes a frame to which wheels are attached and a frame. It is provided with an elevating body which is provided so as to be vertically movable and on which a mold holder is placed, and elevating means for elevating the elevating body.

[0008]

[Operation] Molten metal is injected into the mold so that the upper end of the ingot remains in the mold even after the bottom mold reaches the lowered position, and the bottom mold reaches the lowered position to solidify the molten metal in the mold. According to the semi-continuous casting method, which is characterized by raising the mold holder and taking out the upper end of the ingot from the mold after the completion of the process, the pit depth and the bottom die lifting stroke are not changed. The length of the ingot to be cast can be increased as compared with the conventional method.

A mold for a semi-continuous casting apparatus comprising a frame to which wheels are attached, an elevating body provided on the frame so as to be vertically movable and on which a mold holder is mounted, and elevating means for elevating the elevating body. According to the support cart, after the bottom mold reaches the lowered position and the solidification of the molten metal in the mold is completed,
Even if the upper end of the manufactured ingot exists in the mold, the upper end of the ingot can be taken out of the mold by raising the elevating body by the elevating means.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. In addition, in the following description, FIG.
The left and right of is called the left and right, the lower side of FIG. 2 is called the front, and the opposite side is called the rear.

FIG. 1 shows the whole structure of a semi-continuous casting apparatus,
2 to 5 show a mold support carriage. 6 and 7 show the state of the semi-continuous casting apparatus at the final stage of casting.

In FIG. 1, the semi-continuous casting apparatus is equipped with a pit.
(P) Front and rear rails that extend in the left-right direction
(1) Mold support trolley running on (2) and mold support trolley
A mold holder (4) supported by (2) and holding a plurality of water-cooled molds (3), and a plurality of bottom molds (5) that are vertically movable in the pit (P). Casting table
(6) and a casting gutter (7) arranged above the mold holder (4) and extending in the left-right direction for guiding molten metal to each mold (3).
It has and.

1 to 5, a mold support carriage (2)
Is a horizontal rectangular frame (9) with wheels (8) attached to it that is long in the left-right direction, and a long rectangular shape that is mounted on the frame (9) so that it can move up and down and the mold holder (4) is placed. It is provided with a horizontal rectangular frame-shaped lifting body (10) and a pneumatic bellows type lifting device (11) for lifting the lifting body (10).

The frame (9) includes front and rear frame members (12).
And a left and right frame member (13) connecting the left and right ends of the front and rear frame member (12). Front and rear frame members
The (12) includes a pair of front and rear I-shaped frame member constituting bars (14) arranged at intervals in the front-rear direction. Both frame member configuration bars (14) have horizontal high-level portions (15) which are present at both left and right ends thereof and each have a predetermined length,
It has a horizontal lower part (16) existing between both higher parts (15). Both the high-order part (15) and the low-order part (16) are integrally connected via a vertical connecting part (17). In addition, both frame member configuration bars (14) have their left and right end surfaces connected to each other by a connecting member (18), and at the same time, the high-order portion (15).
The inner ends in the left-right direction of are connected to each other by a connecting plate (19) extending between the upper surfaces thereof. A pair of front and rear hanging walls provided on the lower surface of each connecting plate (19) at a distance from each other.
A wheel support bracket (21) having (20) is fixed. A wheel (8) rolling on the rail (1) is rotatably supported between the hanging walls (20) of the wheel support bracket (21).

A wheel support bracket having a pair of front and rear hanging walls (24) provided on the lower surfaces of both left and right ends of the front and rear frame members (23) of the elevating body (10) and spaced apart from each other.
(25) is fixed. Then, the wheel support bracket (2
Wheels (26) rolling on the rail (1) between the hanging walls (24) of (5)
Are rotatably supported. Wheel Support Bracket (25)
Are arranged between the left and right ends of both frame member constituting bars (14) of the front and rear frame members (12) of the frame (9) so as to be vertically movable with respect to the frame member (12).

The bellows type lifting device (11) utilizing air pressure is provided on both left and right ends of the lower portion (16) of both frame member constituting bars (14) in the front and rear frame members (12) of the frame (9). There is. Bellows type lifting device using air pressure (1
1) is both frame constitution bar (14) of front and rear frame members (12)
The board (27) fixed across the upper surfaces of the board and the board (27)
Lifting plate (28) placed above the board, board (27) and lifting plate (28)
A bellows (29), which is interposed between the lower end and the base plate (27), and the upper end is fixed to the lift plate (28).
And consists of. The lifting plate (28) is a front and rear frame member of the lifting body (10).
It is located below (23). Although not shown, the bellows (29) may be supplied with pressurized air inside the bellows (29),
An air supply / discharge device for discharging the compressed air in the bellows (29) is connected. Further, vertical slide bushes (30) are attached to the inner edge portion in the front-rear direction of the substrate (27) of each pneumatic bellows type lifting device (11) at intervals in the left-right direction. A cushion ring (31) made of synthetic resin or the like is placed on the upper end of the slide bush (30). On the other hand, the lifting plate (28) of each pneumatic bellows type lifting device (11)
The guide bar (3) that is slidably fitted to the slide bush (30) at the inner edge of the
2) is attached in a hanging shape. The frame member constituting bar (14) on the inner side in the front-rear direction of the front and rear frame members (12) of the frame (9) is partially notched so as not to interfere with the guide bar (32).

Semi-continuous casting using the semi-continuous casting apparatus equipped with the above-described mold supporting cart is carried out as follows. Bellows of bellows type lifting device (11) using pneumatic pressure in advance
The pressurized air in (29) is removed and the lifting body (10) is lowered. At this time, the wheel (26) of the lifting body (10) is also attached to the rail (1).
Listed above. In this state, the mold support carriage (2) is moved to above the pit (P). Also casting table
(6) is in the raised position and the top of each bottom mold (5) is
Within (3).

Then, the injection of the molten metal from the casting gutter (7) into each mold (3) is started. The molten metal injected into the mold (3) is cooled from its surroundings and solidified from the lower part in the mold (3) to form an ingot (I). Then, the casting table
By lowering (6), the bottom mold (5) is lowered, and the ingot (I) whose solidification in the lower part of the mold (3) has been completed is pulled out from the mold (3) downward at a constant speed. Go. The molten metal is injected so that the upper end of the ingot (I) remains in each mold (3) even after the bottom mold (5) reaches the lowered position. And bottom mold (5)
After the molten metal in each mold (3) is solidified by reaching the lower position, the upper end of each ingot (I) remains in each mold (3) as shown in FIG. . Therefore, as shown in FIG. 7, the mold holder (4) is lifted and the upper end of each ingot (I) is taken out from each mold (3). That is, compressed air is supplied into the bellows (29) of each bellows type lifting device (11) utilizing air pressure,
By raising the lifting plate (28), the lifting body (10) is raised, and the mold holder (4) is raised. At this time, the lifting body (1
The wheels (26) mounted on (0) move away from the rails (1).
After that, the mold support carriage (2) is moved from above the pit (P) to take out the ingot (I) or replace the mold (3).

In the above-mentioned embodiment, the pneumatic bellows type lifting device is used as the lifting means for lifting the lifting body (10), but instead of this, a fluid pressure cylinder, a pantograph or the like may be used.

[0020]

As described above, according to the semi-continuous casting method of the present invention, the obtained ingot can be produced in the same manner as the conventional equipment without changing the depth of the pit and the lifting stroke of the bottom die. The length can be made longer than the conventional method. Therefore, the productivity can be improved without increasing the cost.

Further, according to the mold support cart for the semi-continuous casting apparatus of the present invention, even if the upper end of the manufactured ingot is present in the mold after the bottom mold reaches the lowered position, the mold is lifted and lowered. Since the upper end of the ingot can be taken out of the mold by raising the elevating body by the means, the length of the obtained ingot can be made longer than in the conventional method. Therefore, the productivity can be improved without increasing the cost.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing an overall configuration of a semi-continuous casting apparatus equipped with a mold support cart according to the present invention.

FIG. 2 is a plan view showing a mold support carriage according to the present invention.

3 is a partially cutaway enlarged view of FIG.

FIG. 4 is an enlarged sectional view taken along line IV-IV of FIG.

5 is an enlarged sectional view taken along line VV of FIG.

FIG. 6 is a partially cutaway front view of the semi-continuous casting apparatus showing the state of the final stage of casting in the semi-continuous casting method according to the present invention.

FIG. 7 is a partially cutaway front view of the semi-continuous casting apparatus showing another state at the final stage of casting in the semi-continuous casting method according to the present invention.

[Explanation of symbols]

(2) Mold support cart (3) Mold (4) Mold holder (5) Bottom mold (8) Wheels (9) Frame (10) Lift (11) Pneumatic bellows type lifting device (lifting means)

Claims (2)

[Claims] 1. When casting using a semi-continuous casting apparatus in which a mold holder holding a plurality of molds is supported by a mold support cart, casting is performed in the mold even after the bottom mold reaches a lowered position. The molten metal is poured into the mold so that the upper end of the ingot remains, and after the bottom die reaches the lowered position and the solidification of the molten metal in the mold is completed, the mold holder is raised to raise the upper end of the ingot. The semi-continuous casting method is characterized in that 2. A mold support carriage for supporting a mold holder holding a plurality of molds in a semi-continuous casting apparatus,
A frame to which wheels are attached, an elevating body provided on the frame so as to be vertically movable and on which a mold holder is mounted,
A mold support cart for a semi-continuous casting apparatus, comprising a lifting means for lifting a lifting body.