JPH06102262B2 - Casting equipment - Google Patents

Description

The present invention relates to a casting device for a long billet of aluminum or the like which is continuously cast in an aluminum casting plant.

[Prior Art] In a conventional aluminum casting plant, a casting apparatus for continuously casting an aluminum billet (hereinafter, simply referred to as a billet) has a mold table for molding a molten aluminum alloy into a cylindrical shape, and a vertically downward direction from the mold table. It has a base part to which a receiving part for receiving the billet tip part that comes out first is attached, and the base part descends as the billet is cast, and a long billet of several meters is cast.

Here, the long billet is not held in any way on the way, and the receiving portion merely holds the tip portion of the billet slightly, so that it may fall down. Therefore,
At the time of casting, the bills are inserted one by one into a tilt-prevention frame having a lattice-shaped insertion portion in the frame body. This fall prevention frame is placed on the base part,
When the base part is lowered, it falls part way, and the engaging convex part provided on the frame of the anti-tilt frame engages with the locking part that is fixed in the pit of the casting machine at the position where the billet becomes long to some extent. To be done. However, at this time, the base portion continues to descend at a predetermined speed regardless of the locking of the fall prevention frame.

[Problems to be Solved by the Invention] In the case of the above-described conventional technique, a plurality of engaging convex portions are attached to the frame body in order to securely hold the fall prevention frame,
It is not possible for the engaging protrusions to be engaged with the engaging portion at the same time, and the timing of engaging the engaging protrusions is deviated, which causes the base portion to vibrate. Then, due to this vibration, there is a problem that wavy unevenness is formed on the billet surface coming out of the mold table.

Particularly in recent years, the weight of the fall prevention frame tends to be heavy due to an increase in the number of castings for mass production, measures for use as a work floor, and the like. As a result, due to the above-mentioned timing shift when the anti-tilt frame engages with the locking part, the load on the base part changes greatly and the position of the center of gravity of the entire base moves greatly. The vibration generated in the part tended to increase.

The present invention has been made in view of the above-mentioned conventional technique, in which vibration does not occur in the base portion even when the fall prevention frame is locked,
An object of the present invention is to provide a casting device that enables good continuous casting of billets.

[Means for Solving the Problems] The present invention relates to a mold table for molding a billet,
A base portion to which a receiving portion that receives the billet tip portion that first comes out vertically downward from the mold table and that descends together with the billet is attached; and is provided between the mold table and the base portion. The casting apparatus is provided with a fall prevention member through which the billet is inserted, and an elevating device that holds the fall prevention member and moves the fall prevention member up and down by a drive device that is provided independently of the base portion.

[Operation] The casting apparatus of the present invention raises and lowers the fall prevention member independently of the base portion supporting the billet, and vibrates on the base portion even when the fall prevention member is locked midway when the base portion descends. Is to prevent the occurrence of.

Embodiments Embodiments of the present invention will be described below with reference to the drawings.

1 to 3 show a first embodiment of the present invention. The casting apparatus of this embodiment is a mold table 10 for simultaneously forming a plurality of molten aluminum alloys vertically and horizontally into a cylindrical billet. , Vertically downward from the mold table 10, the receiving portion 12 for receiving the tips of a plurality of billets that come out first (only two of them are shown in the figure for simplification)
And a base portion 14 having. The base portion 14 is billet 16 by a well-known hydraulic cylinder mechanism (not shown).
Pit which is the casting space at a constant speed with the casting of
Descend in 18

Between the mold table 10 and the base part 14, there is a billet.
A fall prevention frame 20 which is a member for preventing the fall of 16 is provided. As shown in FIG. 2, the fall prevention frame 20 has a frame body 22.
Insertion portions 24 of the billet 16 are formed in a lattice shape, and the billets 16 are inserted one by one. On the outer side wall on the long side of the frame 22, each side 2 for stopping and placing the fall prevention frame 20 on the locking portion 30 provided at a predetermined position in the pit 18. A total of four engaging projections 26 are provided for each. In addition, the fall prevention frame 20 is provided on the outer wall on the short side of the frame body 22.
There are provided a total of four engaging projections 28, two for each side, for holding the same when moving up and down.

In the fall prevention frame 20, the engaging convex portions 28 are placed and held in the concave portions of the holding portions 34 of the pair of lifting mechanisms 32 provided on the front surface and the back surface, respectively, and the pair of holding portions 34, Mounted on a single horizontal member 36, the horizontal member 36 includes a rack 38
Is provided and is supported by a drive column 40 mounted in the vertical direction and guide columns 42 provided on both sides of the drive column 40. A pinion 44 is engaged with the rack 38 of the drive column 40, and the pinion 44 is connected to a drive motor 46 of a drive device 45 via a transmission 48. Below the pinion 44, a guide member 50 having a guide roller 48 for guiding the drive column 40 is provided, and below the guide column 42, two pairs of facing members for guiding this are also provided. A guide member 54 having a guide roller 52 is provided.

The operation of the tilt-prevention frame elevating / lowering device of this embodiment is as follows.First, the billet 16 cast out from the mold table 10 is received by the receiving portion 12 at its end edge portion, and the base portion holding the receiving portion 12 in accordance with the casting. When 14 starts descending, at the same time, the fall prevention frame 20 located slightly away from the base portion 14 also begins descending. The descent is performed in synchronization with the descent of the base portion 14 by a drive control device (not shown).

Then, when the billet 16 is cast to a certain length, the fall prevention frame 20 engages with the engaging portion 30 in the pit 18 and the protruding portion.
26 is engaged and locked in that position. At this time, since the base portion 14 separates from the fall prevention frame 20 and descends independently, vibration does not occur even when the fall prevention frame 20 is locked. Further, the drive motor 46 is stopped at a position slightly lowered after the fall prevention frame 20 is locked, and the drive column 40 and other lifting mechanisms 32 are stopped.
Stops at that position.

After that, the base portion 14 is further lowered by several meters and stopped at a predetermined position to complete the casting of the billet 16.

According to this embodiment, the base portion 14 and the fall prevention frame 20 at the time of casting of the billet 16 descend separately, and the fall prevention frame is the base portion.
It is locked by the locking portion 30 in the pit 18 without affecting the lowering of the base 14, and no vibration is given during the lowering of the base portion 14.

Further, since the lifting mechanism 32 and the drive device 45 of this embodiment raise and lower the fall prevention frame 20 by the electric drive motor 46 and the rack and pinion 38, 44, the position control can be accurately performed and the base portion 14 It is possible to accurately follow the descent of. In particular, the frame for preventing falling from the initial casting of billet 16
Unless the 20 is lowered, the state of the billet 16 coming out of the mold table 10 cannot be understood by the fall prevention frame 20, which causes problems such as metal leakage and surface texture cannot be grasped. It is possible to synchronize with the lowering of the portion 14, and it is possible to reliably grasp the casting state from the initial stage of casting, and it is possible to perform good casting.

Next, a second embodiment of the present invention will be described with reference to FIG. Here, description of the same members as those in the above-described embodiment will be omitted.

In this embodiment, the lifting mechanism 60 for the fall prevention frame 20 is composed of two pairs of hydraulic cylinders 62 and pistons 64 facing each other at the front and the back, and guide members 66 are provided on both sides of each of them. The drive device is a hydraulic pump and a hydraulic control device (not shown).

According to this embodiment, the lifting control can be performed even for the extremely heavy fall prevention frame.

The frame elevating / lowering device for the fall prevention member according to the present invention is not limited to the above-described embodiment, and may be any fall prevention member that can be moved up and down independently of the base portion, and its shape or the form of the lifting mechanism does not matter. .

Further, the fall prevention member may be of any shape as long as it surrounds the billet in the front-rear direction and prevents the fall, in addition to the frame and the lattice.

[Advantages of the Invention] In the billet fall prevention frame elevating device of the present invention, the base portion holding the billet tip portion and the billet fall prevention frame descend in a state where they are separated from each other when the billet is cast,
The fall-prevention frame is uniquely locked by the locking part during lowering and does not affect the base part, so there is no vibration in the base part and the billet may be scratched when the fall-prevention frame is locked. Absent.

[Brief description of drawings]

FIG. 1 is a schematic front view showing a first embodiment of the casting apparatus of the present invention, and FIG. 2 is a schematic plan view of a fall prevention frame of this embodiment,
FIG. 3 is a partially cutaway left side view of the drive unit of this embodiment, and FIG. 4 is a schematic front view of the second embodiment of the present invention. 10 …… Mold table, 14 …… Base part, 16 …… Billet, 20 …… Tipping prevention frame, 26, 28 …… Engagement convex part, 30 ……
Locking part, 32,60 ... Lifting mechanism, 45 ... Drive device,

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Bibliographic references Sho 54-9112 (JP, U) Japanese Patent Sho 46-34311 (JP, B1)

Claims (1)

[Claims] 1. A mold table for molding a long billet by continuous casting, and a billet tip that first comes out downward from the mold table in a vertically downward direction,
In a casting apparatus having a base portion to which a receiving portion that descends together with a billet is attached, a fall prevention member that is provided between the mold table and the base portion to prevent the billet from falling, and holds this fall prevention member The casting apparatus is provided with an elevating device that elevates and lowers the fall prevention member by a drive device that is provided independently of the base portion.