JPS62127153A - Automatic pouring device for die casting machine - Google Patents

Abstract

PURPOSE:To shorten a conveyance distance so as to shorten the time for pouring and to prevent the decrease of a molten metal temp. by driving a lifting mechanism which moves a ladle in a vertical direction into the molten metal in a crucible and to ladle the molten metal by a rotating mechanism which turns the ladle to make pouring. CONSTITUTION:An air cylinder 14, etc., on a lifting frame 9 and the ladle 4 are guided by guides 11, 11 and guide bars 10, 10 so as to descend to the crucible 5 side when a cylinder 12 is extended. The descending is once stopped by molten metal surface detecting electrodes 24, 24 when the ladle 4 descends down to the position where the molten metal 6 enters the ladle. The necessary time until the molten metal 6 is ladled into the ladle 4 is measured by a timer and thereafter the ladle 4 is lifted by the shrinkage of the cylinder 12. A rack 15 is lowered by the extension of a cylinder 14 to turn a driving shaft 18 in a counter-clockwise direction by which a supporting arm 19 and the ladle 4 are turned around a driven shaft 21 in a counter-clockwise direction. The molten metal is thus poured from a spout 23 into a pouring port 7.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to an automatic water supply device for a die-casting machine that pumps up molten metal in a crucible and supplies it to a spout of the die-casting machine.

[Background of the invention]

As shown in FIG. 3, the automatic hot water supply system for this type of die casting machine has a small arm 3 rotatably pivoted to the tip of a large arm 2 whose base end is fixed to a reciprocating shaft 1. It consisted of a ladle 4 attached to the tip.

Then, the molten metal 6 in the crucible 5 is scooped up by the ladle 4 at the position shown by the solid line in FIG. The ladle 4 was lifted to the position shown by the chain line, and then the trajectory of the ladle 4 became almost horizontal, and the ladle 4 was moved along the trajectory to the position shown by the broken line, and the molten metal 6 in the ladle 4 was poured into the pouring lower. .

By repeating the reciprocating movement of the ladle 4 between the crucible 5 and the pouring lower in this manner, the molten metal 6 in the crucible 5 was conveyed to the pouring lower of the die-casting machine.

However, because the distance between the pouring lower of the die-casting machine and the crucible 5 is generally 1.4 to 1.7 m, the hot water supply time is too long, especially when the amount of molten metal 6 in the ladle 4 is small. There was a drawback that the temperature of the molten metal 6 itself decreased during the process, resulting in poor casting quality.

In addition, since the amount of hot water supplied was adjusted by the inclination of the ladle 4, even a slight change in the inclination angle of the ladle 4 caused a significant change in the amount of molten metal 6 supplied, resulting in a disadvantage that the accuracy of oil supply deteriorated.

[Object of the invention] The present invention aims to eliminate such conventional drawbacks,
The objective is to create an automatic hot water supply system for die-casting machines that can reduce the conveyance distance as much as possible, shorten the hot water supply time, prevent a drop in hot water temperature, and improve the accuracy of hot water supply. be.

[1 Summary of the Invention] In order to achieve the above-mentioned object, the present invention includes an elevating mechanism that moves a ladle upward and downward into the molten metal in a crucible to draw it up, and a lifting mechanism that rotates this ladle to pour the molten metal. It is driven by a rotating mechanism.

[Embodiments of the invention]

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

FIG. 1 is a longitudinal sectional view showing an automatic hot water supply device for a die casting machine according to an embodiment of the present invention, and FIG. 2 is an explanatory view showing how hot water is supplied by the ladle of FIG.

In FIGS. 1 and 2, reference numeral 4 indicates a ladle, 5 indicates a crucible, 6 indicates molten metal, and 7 indicates a spout, which are the same as those of the conventional one.

Reference numeral 8 denotes a lifting mechanism for moving the ladle 4 upward and downward.
It is composed of a guide bar 10.10, guides 11, 11, and a cylinder 12 that support the.

Reference numeral 13 denotes a rotating mechanism that rotates the ladle 4 and pours the molten metal. 19, sprocket 20
A driven shaft 21 and a chain 22 that support the lifting frame 9
It is made up of. 23 is a gutter, and 24 is a scene detection electrode.

In such a structure, the molten metal 6 in the crucible 5 is transferred to the ladle 4.
When scooping the crucible, both the elevating mechanism 8 and the rotating mechanism 13 are lowered toward the crucible 5 side.

In other words, due to the expansion of the cylinder 12, the elevating frame 9
Air cylinder 14, rack 15, pinion 16, sprocket 17, drive shaft 18, support arm 19,
The sprocket 20, the driven shaft 21, the chain 22, the level sensing electrode 24 and the ladle 4 are all guided along the guides 11, 11 and the guide bar 10.10, and the crucible 5
descend to the side.

When the molten metal 6 descends to the position where it enters the ladle 4 (FIG. 1) in this manner, its descent is temporarily stopped by the scene detection electrodes 24,24.

After measuring the time necessary until the molten metal 6 of the crucible 5 is pumped into the ladle 4 by a timer (not shown),
This time, due to the contraction of the cylinder 12, the drive mechanism 8 and the rotation mechanism 13 also rise, but when rising, the rotation mechanism 8
The ladle 4 moves as shown in FIG.

Hereinafter, the manner in which the ladle 4 in FIG. 1 moves will be explained using FIG.
They are called a, 4b, 4c, 4d, and 4e.

In other words, the ladle 4a in FIG. 2 is located at the point where the ladle 4 in FIG. 1 draws the molten metal 6 from the crucible 5.

When the ladle 4a stops at the pouring point, a timer (not shown) operates, and when the timer expires, the ladle 4a is raised to the position of the ladle 4b by the elevating mechanism 8 shown in FIG. 1 and stopped.

This movement from the ladle 4a to the ladle 4b is caused by the contraction of the cylinder 12 shown in FIG. 20, the driven shaft 21 and the ladle 4 are all lifted by the contraction of the cylinder 12.

When the ladle 4a is lifted up to the position of the ladle 4b and the ladle 4b stops, the excess molten metal 6 in the ladle 4b overflows into the crucible 5 and is measured.

Then, when a timer (not shown) times out,
The ladle 4b now moves to the horizontal position of the ladle 4c, and the molten metal 6 in the ladle 4C is prevented from spilling.

That is, in the movement from the ladle 4b to the ladle 4c, the rack 15 is lowered by the expansion of the air cylinder 14 in FIG. 1, and the pinion 16 meshing with the rack 15 is rotated counterclockwise.

As the binion 16 rotates counterclockwise, the sprocket 17 and drive shaft 18 also rotate counterclockwise, and the chain 22 rotates the sprocket 20, driven shaft 21, support arm 19, and ladle 4 counterclockwise. Let me, second
It is driven from the position of the ladle 4b in the figure to the position of the ladle 4c.

Then, the ladle 4c in FIG. 2 is raised to the upper limit position by the lifting mechanism 8 in FIG. 1, and stopped at the position of the ladle 4d in FIG. 2.

Here, the second pouring signal is sent from the die casting machine.
The ladle 4d in the figure is rotated to the position of the ladle 4e, and the ladle 4d is rotated to the position of the ladle 4e.
The molten metal 6 in e is poured from the gutter 23 to the pouring lower.

That is, the rotation from the ladle 4d to the ladle 4e in FIG. 2 is achieved by extending the air cylinder 14 in the same way as described above, lowering the rack 15, and moving the pinion 16, sprocket 17, and drive shaft 18 counterclockwise. The chain 22 rotates the sprocket 20, the driven shaft 21, and the support arm 1.
9. By rotating the ladle 4 counterclockwise and rotating the supporting arm 19 and the ladle 4 counterclockwise using the driven shaft 21 as a fulcrum, the ladle 4d is moved from the ladle 4e as shown in FIG. The pot is turned over and poured into the pot.

The ladle 4e in FIG. 2 is timed by a timer (not shown), returns to the position of the ladle 4d, and waits for the next cycle.

In this way, the ladle 4 in FIG.
The ladle 4 is given upward, downward, and rotational motion by the ladle 4a, 4b, and 4c in FIG.

The molten metal 6 in the crucible 5 is transferred to the gutter 2 as shown in 4d and 4e.
The molten metal is supplied from No. 3 through the pouring lower.

According to an experiment conducted by the inventor on shortening the transport distance of the ladle 4, it was confirmed that the transport distance of water heaters with the same ladle capacity was significantly shortened as shown in the table below.

The conveyance distance of the dollars marked with * in the table refers to the conveyance distance from the ladle 4a to the ladle 4d in FIG.

〔Effect of the invention〕

According to the present invention, the ladle is driven by an elevating mechanism that moves the ladle upward and downward into the molten metal to draw it up, and a rotating mechanism that rotates the ladle to pour the molten metal, so that the molten metal is transported. By shortening the distance, it is possible to shorten the hot water supply time, prevent the temperature of hot water from decreasing during transportation, and improve the accuracy of hot water supply.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing an automatic hot water supply device for a die casting machine according to an embodiment of the present invention, Fig. 2 is an explanatory diagram showing the movement of the ladle shown in Fig. It is a sectional view showing a hot water supply device. 4... Ladle, 5... Crucible, 6...
・・・・・・7easiness, 7・・・・pouring port, 8・・・・
... Lifting mechanism, 13...Rotating mechanism. ,) Q Dan': 4b J., I\Ding agent Patent attorney Kenjibu Takeshi's enemy? :', 1 cho' + Figure 1 Figure 2

Claims (1)

[Claims] An automatic water supply device for a die-casting machine that pumps up molten metal in a crucible with a ladle and supplies it to a spout, includes a lifting mechanism that moves the ladle upward and downward into the molten metal in the crucible to draw it up, and a lifting mechanism that rotates the ladle. An automatic hot water supply device for a die casting machine, characterized in that it is driven by a rotating mechanism that pours hot water.