JPH1177280A - Tilting type gravity casting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the deterioration of quality of a cast parts and to easily execute the automation by almost perfectly preventing the flowing of oxide layer formed on the surface in a molten metal receiver into the cast parts. SOLUTION: In a tilting type gravity casting device for pouring molten metal stored in the molten metal receiver 20 into a mold 21 from a pouring hole by tilting a casting machine frame to which the molten metal receiver 20 for storing the molten metal and the mold 21 into which the molten metal is powered are fitted, a baffer plate 58 fitted to the pouring hole 20a of the molten metal receiver 20 from the upper part, is fitted so as to be freely shaken at the pouring side of the molten metal into the mold 21.

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. 4, 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]

By the way, in the inclined gravity casting apparatus, as shown in FIG. 6, the upper surface of the molten metal transferred to the hot water receiver 6 is oxidized in contact with air to form a thin oxide layer. It is formed. If it is poured into the mold as it is, the oxide layer will flow into the cast part and impair its quality, so the operator rotates (inclines) the mold and the hot water pan.
Immediately before the removal, the oxide layer on the surface of the molten metal was scraped off by hand. Since such manual scraping work is required, it is difficult to automate the casting work, and there is a possibility that the removal of the oxide layer may be incomplete due to the manual work.

The present invention has been made in view of the above circumstances, and it is possible to almost completely prevent an oxide layer formed on a surface in a hot water reservoir from flowing into a cast part, thereby improving the quality of the cast part. It is an object of the present invention to provide a tilt type gravity casting apparatus which can prevent the drop and can easily perform the automation.

[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. A tilt type gravity casting device for pouring molten metal into the mold from an inlet, wherein a baffle plate fitted into the inlet of the hot water receiver from above is rocked on a side of the mold into which the molten metal is poured. It is characterized by being movably mounted.

Further, the hot water receiver is attached to the casting machine frame via an advancing / retreating means which can be moved toward and away from the mold, and after rotating the casting machine frame to pour molten metal into the mold, It is preferable that after a predetermined time has elapsed, the advance / retreat means is driven to retract the hot water receiver with respect to the mold so as to release the engagement with the baffle plate. Further, after pouring the molten metal into the mold, it is preferable that the molten metal receiver is retracted with respect to 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 tank substantially solidifies. .

[0007]

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. 2, the casting apparatus 10 is configured by mounting a hot water receiver 20 in which molten metal is stored and a mold 21 into which the molten metal is poured, to a casting machine frame 22. 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. Shaft 2
An arm member (not shown) is fixed to an end of the arm member 4. A piston rod (not shown) of a swing cylinder (not shown) is connected to a tip of the arm member. By extending or retracting, the casting machine frame 22 can be driven to rotate (swing) about the shaft portion 24 as the 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.

A cylinder 45 (corresponding to the advancing / retracting means of the present invention) is fixed to the casting machine frame 22 via a bracket 45b, and a piston rod 45a of the cylinder 45 is attached to a joint member attached to the outside of the bottom of the bath 20. 50
It is connected to. The hot water receiver 20 can be moved toward and away from the mold 21 by the forward and backward driving of the piston rod 45a.

As shown in FIG. 1, on the side of the mold 21 into which the molten metal is poured, support members 57 each having a ring portion 57a formed at the tip thereof are provided upright on both sides of the mold 21. A rod-shaped member 59 is provided on the ring portion 57a of each support member 57.
Is loosely inserted into the ring portion 57a, and the bar-shaped member 59 is integrally provided with a plate-shaped baffle plate 58 for preventing the oxide on the surface of the molten metal in the hot water receiver 20 from flowing into the mold 21. Fixed. For this reason, the baffle plate 58 can swing about the respective ring portions 57a, and hang down in the vertical direction due to gravity. Further, the baffle plate 58 is set to have such a width that the baffle plate 58 can be fitted into the inlet 20a of the baking plate 20 from above when the boiler plate 20 is brought close to the mold 21. The dimensions are such that a slight gap is formed between the inner surface of the hot water receiver 20. Incidentally, in the present embodiment, the dimensions are set such that a gap of about 10 mm is formed between the lower edge of baffle plate 58 and the inner surface of hot water receiver 20.

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

First, a molten metal is pumped out from a melting and holding furnace by a ladder or the like, and is conveyed to a vicinity of a 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
Extend a. Thereby, the hot water receiver 20 is advanced in the direction of the mold 21, and as shown in FIG. 1, the inlet 20 a of the hot water receiver 20 and the mold 21 are closely engaged with each other, and the inlet 20 a of the hot water receiver 20 is The baffle plate 58 is fitted.

Next, the swinging cylinder is driven to rotate (swing) the casting machine frame 22 about the shaft portion 24. Thereby, as shown in FIG. 2, the mold 21 and the bath 20 rotate (oscillate) together, and the molten metal in the bath 20 flows into the cavity 21 a of the mold 21.

After a predetermined time (about 15 seconds in the present embodiment) has elapsed after the casting machine frame 22 has been rotated and the molten metal has been poured into the mold 21, as shown in FIG. And the hot water receiver 20 is retracted with respect to the mold 21. This is because if the molten metal is poured and left to stand, the oxide layer will enter between the baffle plate 58 and the inlet of the hot water receiver 20 and will harden, making it impossible to remove the hot water receiver 20. In the present embodiment, since the oxide and the baffle plate 58 are separated by the retreat of the hot water receiver 20, such a situation can be prevented.

Further, the timing of retreating the hot water receiver 20 is such that, after the molten metal is poured into the mold 21, immediately before the time when the thin-film molten metal remaining on the inner surface of the hot water receiver 20 is substantially solidified has elapsed. Is preferred. This is because if the retreat is too fast, the molten metal in the form of a thin film flows out, and a mountain such as an oxide layer is formed at the edge of the mold 21.

After a predetermined time has passed after the casting machine frame 22 has been rotated and the molten metal has been poured into the mold 21, the piston rod 45a of the cylinder 45 is retracted and the hot water receiver 20 is removed.
Is retracted with respect to the mold 21, so that the oxide layer remaining inside the hot water receiver 20 and the cast part are forcibly separated at the time of retreat, and both 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 solidified when the hot water receiver 20 is retracted, so that the separation is extremely easy.

As described above, the baffle plate 58 is fitted and disposed at the tip of the hot water receiver 20, so that the oxide layer formed on the surface of the molten metal is dammed by the baffle plate 58 as shown in FIG. And is prevented from flowing into the mold 21,
Clean molten metal with no oxides formed is baffle 5
8 flows into the cavity 21 a of the mold 21 through a gap formed between the lower edge of the mold 8 and the inner surface of the hot water receiver 20. Therefore, it is possible to almost completely prevent the oxide layer on the surface from flowing into the cast part, and it is possible to prevent the quality of the cast part from deteriorating.

Further, when the molten metal is poured by mounting the hot water receiver 20 and swinging the casting machine frame 22,
Since it automatically acts to block the inflow of the oxide layer,
There is also an advantage that there is no need to take the timing of removal, and automation becomes extremely easy.

Further, since the baffle plate 58 is swingably supported by the ring portion 57a of the support member 57, the casting machine frame 22 is swung to cast the molten metal in the hot water receiver 20 even when pouring the molten metal. It swings following the movement of the machine frame 22 and swings following the flow of the molten metal.
Thus, even if a wave occurs in the molten metal when the molten metal is poured, the baffle plate 58 swings with the wave and the oxide can be prevented from flowing into the mold 21.

[0021]

As described above, in the casting apparatus of the present invention, it is possible to almost completely prevent the oxide layer formed on the surface in the bath from flowing into the cast part, and to improve the quality of the cast part. Can be prevented and automation can be easily performed.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a main part of a casting apparatus according to an embodiment of the present invention.

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

FIG. 3 is a schematic view showing an operation state of the casting apparatus of FIG. 2;

FIG. 4 is a view showing a conventional casting method.

FIG. 5 is a view showing a casting state of the casting method of FIG. 4;

FIG. 6 is a view showing a problem of the casting method shown in FIGS. 4 and 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Casting apparatus 11 Holding furnace 20 Hot water receiver 20a Inflow port 21 Mold 22 Casting machine frame 45 Cylinder (advancing / retracting means) 45a Piston rod 57 Supporting member 57a Ring part 58 Baffle plate 59 Rod member

Claims (3)

[Claims] 1. A casting machine frame to which a molten metal reservoir in which molten metal is stored and a mold into which the molten metal is poured is rotationally driven to move the molten metal stored in the molten metal through an inlet. An inclined gravity casting apparatus that is poured into a mold, and on a side of the mold where molten metal is poured,
An inclined gravity casting apparatus, wherein a baffle fitted into the inlet of the hot water receiver from above is swingably attached. 2. The hot water receiver is attached to the casting machine frame via an advancing / retreating means that can approach and separate from the mold, and after rotating the casting machine frame to pour molten metal into the mold, The inclined type according to claim 1, wherein after a predetermined time has elapsed, the advance / retreat means is driven to retract the hot water receiver with respect to the mold so as to release the engagement with the baffle plate. Gravity casting equipment. 3. 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 2.