JPS61259864A - Automatic pouring device for aluminum furnace for small-sized die casting machine - Google Patents

Abstract

PURPOSE:To stop surely pouring and to assure the safety of a pouring operation by connecting a piston valve having a semi-spherically shaped top end of an aluminum furnace disposed on a moving carriage to an air cylinder by means of a universal joint and rotating and lowering the piston valve so as to contact with a nozzle seat. CONSTITUTION:The piston valve 7 having the semi-spherically shaped top end of a molten aluminum pouring furnace 1 disposed on the moving carriage 2 is connected to the air cylinder 18 and a piston rod 15 by means of the universal joint 9. The valve 7 which is rotated by a motor 12 is pressed surely to the nozzle 24 seat 11 to clost a through-hole 11a when the rod 15 descends while pressing the piston valve. The pouring to a die casting machine and the stoppage thereof are surely and safely executed. The pouring trouble is thus prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to an automatic pouring device for an aluminum furnace for a small die-casting machine. In addition to providing a valve that can be raised and lowered,
This invention relates to an automatic pouring device in which molten aluminum is poured into a sleeve via a seat and a nozzle as a piston valve rises, and the seat is closed and the supply of molten aluminum is stopped as the piston valve rotates downward.

B6 Conventional technology Die-casting machines that automatically mass-produce castings in a short time by press-fitting molten alloy into precision molds at high temperatures are used to cast zinc alloys, tin alloys, lead alloys, etc. Hot chamber die casting machines with a furnace as part of the machine are mainly used, while cold chamber die casting machines with a separate heat retention furnace are mainly used for casting aluminum alloys, magnesium alloys, copper alloys, etc.

Therefore, for example, when casting small aluminum products, a cold chamber type die casting machine is usually used.

Problems that the invention aims to solve In die-casting machines used to cast aluminum products, the molten metal is pumped up from a separate heat-retaining furnace using a ladle, so the molten metal cools down during transfer of the ladle or during standby. This often had a negative impact on the product. This tendency was particularly strong in the case of casting small aluminum products because the amount of hot water was small.

20 Means for Solving the Problems In view of the above points, the present invention is provided with a piston valve 7 disposed in the hot water supply furnace 1 so as to be able to rise and fall freely, and a lower surface of the piston valve 7 provided on the bottom surface of the hot water supply furnace 1 so as to be freely openable and closable. The sheet 11 to be installed is inserted, and the upper end of the nozzle 24 whose lower end is directed toward the pouring port 25a side of the sleeve 25 is connected to the through hole 11a of the sheet 11, and the die-casting machine can be heated without cooling the molten aluminum 3. An object of the present invention is to provide an automatic pouring device for an aluminum furnace for a small die-casting machine, which can pour the metal into a sleeve 25 and press-fit it into a mold.

In the automatic pouring device for an aluminum furnace for a small die-casting machine of the present invention, when the air switching valve 23 connected to the near compressor 20 is turned ON, compressed air is supplied from the lower part of the air cylinder 18 to the air piston. 19 is pushed up against the repulsive force of the coil spring 17. When the air piston 19 is pushed up, the piston valve 7, which is connected to the air piston 19 via the piston rod 15, the shaft 10, and the universal joint 9, moves up. When the piston valve 7 rises and the through hole 11a of the seat 11 is bent,
The molten aluminum 3 in the hot water furnace 1 passes through the through hole Lla of the sheet 11 and the inclined nozzle 24 to the funnel 26 and the pouring spout 25.
Molten metal is poured into the sleeve 25 from a.

When a certain amount of molten metal is poured, the air switching valve 23 is switched to lower the air piston 19 and at the same time, the servo motor 12 rotates the shaft 10 via the gears 13 and 14. In this way, the piston valve 7 is lowered while rotating, and its lower surface is pressed against the seat 11, thereby completely closing the through hole 11a and stopping the supply of the molten aluminum 3.

On the other hand, the molten aluminum 3 poured into the sleeve 25 is press-fitted into the mold by the plunger tip 28 of the injection cylinder 29.

To, Example Hereinafter, one example of implementing the present invention will be explained in detail with reference to the drawings.

1 is a hot water furnace mounted on a frame-shaped cart 2, and there are approximately 70
Molten aluminum melted at 0℃, 3 is the supply port 4 on the rear top surface
Molten metal is poured from the top, and a lid is attached to the top.

A cart 2 carrying a hot water supply furnace 1 is movably mounted on a rail 6 laid on a floor surface.

A piston valve 7 passes through a hole 8 in the lid 5 and is suspended vertically from the hot water furnace 1, and is suspended from a shirt 10 via a universal joint 9.

The lower end of this piston valve 7 comes into contact with the seat ll fitted into the bottom surface of the hot water supply furnace 1 at times other than when hot water is being supplied.
A is occluded.

The ground 1 is attached to the shirt 10 on which the piston valve 7 is hung.
A gear 14 is fixed to mesh with a gear 13 of a servo motor 12 fixed to the servo motor 6, and a thin piston row 15 is connected to the upper part.

This piston rod 15 is always urged downward by a coil spring 17 interposed between the upper surface of the shaft IO and the gland 16, and is connected to an air piston 19 of an air cylinder 18 at the upper part.

Air cylinder 1 mounted on gland 16 on lid body 5
8 communicates with the near compressor 20 via an air pipe 21 and is connected to an air switching valve 23 via an air pipe 22.

Note that this air switching valve 23 is also connected to an air pipe zl.

On the other hand, the through hole 1 of the sear) 11 fitted into the bottom of the hot water furnace 1
A ceramic acid nozzle 24, which is the same as the piston valve 7, is connected to the lower part of the sleeve 1a in an inclined manner.
The molten metal is supplied into the sleeve 25 from the funnel 26 of No. 5 through the pouring port 25a.

□The sleeve 25 to which the molten aluminum 3 is supplied is connected to the base 3
The plunger tip 28 is fitted horizontally in a penetrating state onto a fixed gouge plate 27 mounted on the base plate 2, and a plunger tip 28 is slidably inserted therein. A notch 33 into which the tip of the nozzle 24 and the funnel 26 fit is formed at the rear of the fixed gouging plate 27.

The plunger tip 28 is slidably inserted into the sleeve 25 and is connected to the rod 30 of the injection cylinder 29 at its rear side.

The injection cylinder 29 is mounted on the base 32, and a piston 31 connected to the rear end of the rod 30 is slidably inserted into the injection cylinder 29.

The lower surface of the piston valve 7 is formed into a hemispherical shape as shown in the figure, and when it comes into contact with the hemispherical concave surface formed on the upper surface of the seat 11, it comes into close contact and the molten aluminum 3 flows through the through hole 11a of the seat 11.
It is configured so that it does not leak to the nozzle 24 side through the.

Effects of the Invention As described above, in the present invention, the hot water supply furnace 1 mounted on the trolley 2 is integrally arranged on a cold chamber type die casting machine, and the piston valve 7 in the hot water supply furnace 1 rotates up and down. Since the molten aluminum 3 is poured into the sleeve 25 at high temperature through the through hole 11a of the sheet 11, the nozzle 24, the funnel 26, and the pouring ports 2, 5a, high-quality small aluminum products can be cast efficiently and safely. can. In addition, the device can be made smaller and does not require a ladle or the like, so it has the advantage of being inexpensive to manufacture.

[Brief explanation of drawings]

FIG. 1 is a schematic cross-sectional view showing one example of implementing the present invention, and FIG. 2 is a partial cross-sectional view with the piston valve 7 in an open state. Main symbols in the diagram l@φ・Hot water furnace 2...0 cars 3...molten aluminum 7・Φ・piston valve 9...universal joint 10 days・shaft 1z...servo motor 15...piston Loft 18...Air cylinder 19...Air piston

Claims (1)

[Scope of Claims] (1) A piston valve 7 is disposed in the hot water supply furnace 1 so as to be movable up and down, and a seat 11 is fitted onto the bottom surface of the hot water supply furnace 1 so that the lower surface of the piston valve 7 can freely open and close. An automatic pouring device for an aluminum furnace for a small die-casting machine, characterized in that the upper end of a nozzle 24 directed toward a pouring port 25a side of a sleeve 25 is connected in communication with a through hole 11a of a sheet 11. (2) The automatic pouring device for an aluminum furnace for a small die-casting machine according to claim (1), wherein the piston valve 7 is raised and lowered by an air cylinder 18. (3) The shaft 1 is placed between the piston rod 15 of the air cylinder 18 that raises and lowers the piston valve 7 and the piston valve 7.
0 and a universal joint 9, and the piston valve 7 is rotated and lowered by rotating the shaft 10 when the piston valve 7 is lowered. Automatic pouring device for aluminum furnace for small die casting machines. (4) The shaft 10 is connected to the gear 13 by the servo motor 11.
, 14. An automatic pouring device for an aluminum furnace for a small die-casting machine as set forth in claims (1), (2), and (3). (5) Claims (1), (2) and (3) characterized in that the lower surface abutting portion of the piston valve 7 is formed in a hemispherical shape.
, an automatic pouring device for an aluminum furnace for a small die-casting machine as described in item (4). (8) Claims (1), (2), (3), (
4) An automatic pouring device for an aluminum furnace for a small die-casting machine as described in items 4) and (5).