JPH1177278A - Tilting type gravity casting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely execute the separation of a cast parts from an oxide layer remained in the inner part of a molten metal receiver at the time of casting. SOLUTION: In a tilting type gravity casting device for pouring the molten metal stored in the molten method receiver 20 into a mold 21 by tilting a casting machine frame 22 to which the molten metal receiver 20 for storing the molten metal and the mold 21 into which the molten metal is poured are fitted, the molten metal receiver 20 is fitted to the casting machine frame 22 through an advancing/retreating means (cylinder 45) so as to be approachable/separable to the mold 21. After pouring the molten metal into the mold 21 by tilting the casting machine frame 22, the molten metal receiver 20 is retreated to the mold 21 by driving the advancing/retreating means (cylinder 45) after a prescribed time passes.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inclined gravity casting apparatus for rotating a casting machine frame on which a mold and a hot water receiver are attached, and for pouring molten metal in the hot water receiver into the mold.

[0002]

2. Description of the Related Art As a casting method, there is a so-called inclined gravity casting method. In this method, as shown in FIG. 3, the molten metal is transferred by a ladle 4 to a hot water receiver 6 connected and fixed to a mold 5, and then the mold 5 is rotated together with the hot water receiver 6 as shown in FIG. The molten metal in the hot water receiver 6 is poured into the cavity 7 of the mold. This inclined gravity casting method does not require a complicated casting scheme part, and the molten metal can be poured quietly and quickly by controlling the rotating (tilting) speed.

[0003]

According to the conventional inclined gravity casting method, when molten metal is poured from the hot water receiver 6 into the cavity 7 of the mold 5, a thin film is formed on the inner surface of the hot water receiver 6 as shown in FIG. When the molten metal remaining in the shape solidifies, it oxidizes to form a film-like oxide layer 8. If the next casting is performed with the oxide layer 8 remaining, the oxide layer 8 flows into the cast part and impairs the quality of the part. Therefore, the operator manually removes the oxide layer 8 after each casting. However, if the cast component is left unremoved until it solidifies, the cast component and the oxide layer 8 adhere to each other at the portion 6a in the figure, and the oxide layer 8 is easily removed. Can not be done. Therefore, the operator had to timely remove the oxide layer 8 before the cast part hardened.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides an inclined gravity casting apparatus capable of reliably separating an oxide layer remaining inside a hot water receiver and a cast part during casting. The purpose is to provide.

[0005]

SUMMARY OF THE INVENTION According to the present invention, a casting machine frame provided with a hot water receiver in which a molten metal is stored and a mold into which the molten metal is poured is rotationally driven to store the molten metal in the hot metal receiver. An inclined gravity casting device for pouring a molten metal into the mold, wherein the hot water receiver is attached to the casting machine frame via advancing / retreating means that can approach and separate from the mold, and After a predetermined time has elapsed after the molten metal has been poured into the mold by rotation, the advance / retreat means is driven to retract the hot water receiver with respect to the mold.

After the molten metal has been poured into the mold, the molten metal in the thin-film state remaining on the inner surface of the molten metal receiver is allowed to substantially solidify. Is preferred.

Another tilt type gravity casting apparatus according to the present invention rotates a casting machine frame in which a molten metal reservoir for storing molten metal and a mold into which the molten metal is poured is stored in the molten metal reservoir. An inclined gravity casting apparatus for pouring the molten metal into the mold, wherein the hot water receiver is attached to the casting machine frame via rotating means, and the molten metal is poured into the mold by rotating the casting machine frame. Then, after a lapse of a predetermined time, the rotating means is driven to rotate the hot water receiver with respect to the mold.

After the molten metal has been poured into the mold, the molten metal in the form of a thin film remaining on the inner surface of the molten metal receiver is allowed to substantially solidify, and then the molten metal receiver is rotated with respect to the mold. Is preferred.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an inclined gravity casting apparatus (hereinafter referred to as a casting apparatus) according to an embodiment of the present invention will be described with reference to the accompanying drawings.

As shown in FIG. 1, the casting apparatus 10 comprises a casting machine frame 22 having a hot water receiver 20 in which molten metal is stored and a mold 21 into which the molten metal is poured. The casting machine frame 22 is formed with a shaft portion 24 projecting therefrom. The shaft portion 24 is rotatably supported by a base frame (not shown) fixed to the floor surface. An arm member (not shown) is fixed to the shaft portion 24. The arm member is connected to a piston rod of a swing cylinder (not shown), and by extending or retracting the piston rod, The casting machine frame 22 can be rotated (oscillated) around the shaft portion 24 as a center of rotation. By this rotation (oscillation) operation, the molten metal stored in the hot water receiver 20 is poured into the cavity 21 a of the mold 21.

The cylinder 4 is mounted on the frame 22 of the casting machine.
5 (corresponding to the forward / backward means of the present invention) is a bracket 45
b. The tip of the piston rod 45a of the cylinder 45 is connected to the bottom outer surface of the hot water receiver 20 via a joint member 50, and the hot water receiver 20 can be moved toward and away from the mold 21 by driving the cylinder 45 forward and backward. ing.

Next, the operation of the casting apparatus 10 according to the present embodiment will be described.

First, the molten metal is pumped out of the melting and holding furnace by a ladder or the like, transported to the vicinity of the hot water receiver 20, and the molten metal is transferred from the ladle to the hot water receiver 20.

Next, the piston rod 45 of the cylinder 45
a is projected. Thereby, the hot water receiver 20 is advanced in the direction of the mold 21, and the tip of the hot water receiver 20 and the mold 21 are closely engaged with each other.

Next, the swing cylinder is driven to rotate (swing) the casting machine frame 22 about the shaft portion 24. As a result, as shown in FIG.
The melted metal in the hot water receiver 20 flows into the cavity 21 a of the mold 21 by rotating (swinging) together with 0.

Here, after a predetermined time (about 15 seconds in this embodiment) has elapsed after the casting machine frame 22 has been rotated and molten metal has been poured into the mold 21, the piston rod 45a of the cylinder 45 is retracted. The hot water receiver 20 is retracted with respect to the mold 21. As a result, the cast component in the mold 21 and the thin oxide layer formed on the inner surface of the hot water receiver 20 are forcibly separated from each other, and the cast component and the oxide layer are reliably separated. Incidentally, in the present embodiment, the time required for the solidification of the cast component to be completed is 2 minutes and 30 seconds, and the cast component is not completely hardened when the hot water receiver 20 is retracted, so that the two can be separated very easily. .

Further, the molten metal receiver 20 is moved backward after the molten metal is poured into the mold 21 and after a lapse of time that the molten metal in a thin film remaining on the inner surface of the molten metal receiver 20 is almost solidified (immediately before solidification or solidification). It is preferable to carry out after. If the bath 20 recedes too quickly, the bath 20
Since the molten metal remaining inside the mold is not solidified, the molten metal drips from the hot water receiver 20 when retracted, and
This is because peaks such as an oxide layer are formed at the edge of the first layer, which hinders the subsequent casting operation.

In this manner, the operator does not need to work to separate the oxide layer and the cast part at a proper timing before the cast part hardens.

In the above-described embodiment, the oxide layer and the cast part are separated by retreating the hot water receiver 20 by the cylinder 45. However, as shown in FIG. A swing frame 51 is attached to the frame 22 so as to be rotatable about a pin 52, and the swing frame 5
A motor 53 (corresponding to the rotating means of the present invention) for rotating the cylinder 1 is attached, the cylinder 45 is fixed to the swing frame 51, and the piston rod 45a and the hot water receiver 20 are connected via the joint member 50. You may do so.

In this case, as shown in FIG. 2 (b), the oxide layer formed on the inner surface of the hot water receiver 20 is inverted by turning the motor
Can be dropped inside and discarded. Since the oxide layer can be automatically separated and discarded, the casting apparatus can be easily automated. Further, the oxide layer can be surely removed, and the oxide layer can be effectively prevented from being mixed into the cast part. Note that if air is blown toward the inner surface of the hot water receiver 20, separation of the oxide layer can be promoted.

[0021]

As described above, according to the present invention, it is possible to reliably separate the cast component from the oxide layer remaining inside the hot water receiver during casting.

[Brief description of the drawings]

FIG. 1 is a diagram showing a casting apparatus according to an embodiment of the present invention.

FIG. 2 is a view showing a casting apparatus according to another embodiment of the present invention.

FIG. 3 is a view showing another example of a conventional casting method.

FIG. 4 is a view showing a casting state of the casting method of FIG. 3;

FIG. 5 is a view showing a problem of the casting method shown in FIGS. 3 and 4.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Casting apparatus 20 Hot water receiver 21 Mold 22 Casting machine frame 45 Cylinder 45a Piston rod 50 Joint member 51 Swing frame 52 Pin 53 Motor (rotation means)

Claims (4)

[Claims] 1. A casting machine frame to which a molten metal reservoir for storing molten metal and a mold into which the molten metal is poured is rotationally driven to flow molten metal stored in the molten metal reservoir into the mold. An inclined gravity casting apparatus,
The hot water receiver is attached to the casting machine frame via advancing and retreating means that can approach and separate from the mold,
After the molten metal is poured into the mold by rotating the casting machine frame, after a predetermined time has elapsed, the advance / retreat means is driven to retreat the hot water receiver with respect to the mold. Gravity casting equipment. 2. After pouring the molten metal into the mold, after a lapse of time that the molten metal in the form of a thin film remaining on the inner surface of the hot water reservoir substantially solidifies, the hot water reservoir is retracted with respect to the mold. The inclined gravity casting apparatus according to claim 1. 3. A tilt for injecting the molten metal stored in the hot water receiver into the mold by rotating a casting machine frame to which a hot water receiver in which the molten metal is stored and a mold into which the molten metal is poured are mounted. A gravity casting apparatus, wherein the hot water receiver is attached to the casting machine frame via a rotating means, and after rotating the casting machine frame to pour molten metal into a mold, the rotation is performed after a predetermined time has elapsed. A tilt type gravity casting apparatus characterized in that the means is driven to rotate the hot water receiver with respect to the mold. 4. After pouring the molten metal into the mold, after a lapse of time that the molten metal in the form of a thin film remaining on the inner surface of the molten metal reservoir substantially solidifies, the molten metal reservoir is rotated with respect to the mold. The inclined gravity casting apparatus according to claim 3.