JPH0629761U - Ladle that changes the pouring direction - Google Patents

Abstract

(57) [Summary] [Purpose] To improve the shape of the ladle of the automatic pouring device for pouring into the pouring port of the injection sleeve, and to provide a ladle suitable for cycle improvement, quality improvement and sleeve life extension. [Structure] When pouring, the molten metal pouring portion of the ladle was curved so that the molten metal turned to the injection direction of the injection sleeve at an angle with the ladle pouring direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a ladle for an automatic water heater for a die casting machine, and relates to a ladle for changing the pouring direction, which can improve cycle up and product quality.

[0002]

[Prior art]

 Hereinafter, a conventional technique will be described with reference to the drawings. FIG. 6 is a top view of a part of the cold chamber die casting machine, FIG. 7 is a side view showing the state of the ladle in a stationary state and a pouring state, and FIG. 8 is a schematic configuration diagram of an automatic water heater of the die casting machine. That is, the fixed die 13 is attached to the left side surface 9 of the fixed die plate 8 of the die casting machine, and the injection sleeve 1 penetrates the die plate 8 at a right angle and communicates with the fixed die 13. A pouring port 2 is provided on the upper surface of the injection sleeve 1, and the molten metal 12 in the molten metal heat-retaining furnace 11 is measured by a ladle 5 and pumped up by an automatic hot water supply device 10 including a link mechanism and a chain mechanism shown in FIG. Move horizontally to the side of the sleeve 1, and as shown in FIG. 6, the ladle 5 inverts and rotates the ladle mounting member 6 at the tip of the arm 7 around the axis x in the direction of the arrow c, and melts the molten metal in the ladle 5. Is poured into the pouring port 2 of the injection sleeve 1 as shown by an arrow d.

At this time, the angle formed by the center line AA of the ladle 5 (on the ladle reversal direction line) with respect to the injection sleeve 1 is in the same direction (180 degrees) as the center line (Y-Y) of the injection sleeve 1. It is best if the molten metal can be poured from the top, but when the ladle 5 is moved horizontally to the side of the injection sleeve 1 by the automatic water heater 10, the tip of the swollen molten metal measuring portion 5b below the pouring port 5a of the ladle 5 is moved. Since the portion comes into contact with the injection sleeve 1, this angle θ is set at an angle of about 135 degrees as shown in FIG. This is a condition that the ladle 5 does not hit the injection sleeve 1 and thus is a condition that is barely in terms of mechanical arrangement, and this is a condition that the ladle 5 does not hit the fixed die plate 8 of the die casting machine.

Therefore, as shown in FIG. 6, the molten metal in the ladle 5 has the center line AA of the molten metal measuring portion 5b of the ladle 5 arranged parallel to the arm 7 of the automatic water heater 10, and thus the injection slot The pouring direction of the plunger tip provided at the tip of the plunger rod 4 is poured in the pouring direction 2 shown in FIG. And is supplied to the die unit 13 fixed on the surface 9 side of the fixed die plate 8. At this time, the pouring direction b of the ladle 5 and the injection direction a of the injection sleeve 1 form an angle θ of about 135 ° in the mechanical design as described above. Incidentally, such a conventional technique is disclosed in JP-A-63-248557.

[0005]

[Problems to be solved by the device]

 By the way, in such a method of pouring molten metal by the automatic water heater 10 of the die casting machine, when the ladle 5 is swung rapidly so as to shorten the pouring time, the center line Y-Y of the injection sleeve 1 is moved. On the other hand, since the angle θ is poured at an angle of about 135 degrees, the poured molten metal hits the side wall of the injection sleeve 1 and the molten metal overflows at the pouring port 2 portion of the injection sleeve 1, and the state shown in FIG. As shown in (), a turbulent flow is generated in the injection sleeve 1 and the molten metal does not flow smoothly. That is, the poured molten metal foams and entrains air, and this air is injected into the mold device 13 together with the molten metal to form cavities in the molded product, resulting in quality deterioration. Also, if you wait for the bubbling to subside, the water will be too cold, which also reduces the quality of the product. Moreover, since the molten metal directly hits the side wall, the sleeve is also easily melted and, as a result, the life of the sleeve is shortened.

The present invention has been made in view of the above circumstances, and improves the shape of the ladle of the automatic pouring device for pouring the pouring port of the injection sleeve to improve cycle, quality, and sleeve life. The aim is to provide a suitable ladle.

[0007]

[Means for Solving the Problems] This invention is directed to a molten metal pouring portion of a ladle so that the molten metal changes its direction in the injection direction of the injection sleeve having an angle with the ladle inversion direction line during pouring. It is a ladle that changes the pouring direction, which is formed by bending it in the direction of.

[0008]

[Action]

 The molten metal poured from the ladle aims to improve the cycle by approaching the ideal molten metal flow direction in the injection sleeve, that is, θ = 180 degrees, and further reduces the entrainment of air and melts the sleeve. Product quality can be improved without loss.

[0009]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing the structure of a ladle that changes the pouring direction of an embodiment. The ladle 20 is provided with a curved molten metal pouring portion 20a for changing the pouring direction at its tip, and is formed integrally with the rear molten metal measuring portion 20b. The angle θ formed by the central axis (Y'-Y ') of the injection end of the molten metal pouring portion 20a is 180 degrees with respect to the molten metal extrusion direction of the injection cylinder 1, that is, the central axis (Y-Y) of the injection cylinder 1. It is formed by drawing a curve so that.

Therefore, when the molten metal is poured by the ladle 20, the molten metal is poured from the molten metal measuring portion 20b of the ladle 20 into the injection cylinder along the curve of the molten metal pouring portion 20a. It can be smoothly drawn by drawing a curve on it and can be supplied without creating bubbles.

FIG. 2 is a perspective view showing the structure of a ladle that changes the pouring direction according to the second embodiment. That is, the ladle 21 is composed of almost the same molten metal measuring portion 21b as the ladle 20 shown in FIG. 1, except that the molten metal pouring portion 21a is formed in a cylindrical shape. Therefore, when the molten metal is poured by the ladle 21, the molten metal does not overflow and is drawn in a curved line along the shape of the curved molten metal pouring portion 21a of the raddle 21 to increase the reversing rotation speed of the ladle. Can be even faster.

The above-mentioned two examples are the center axes (Y′-Y ′) of the injection ends of the molten metal pouring portions 20a and 21a for pouring the ladles 20 and 21, and the center axis (YY) of the injection cylinder 1. Although the angle θ formed by and is formed to be 180 degrees, the two examples shown in FIGS. 3 and 4 below are different in that they are formed at an intermediate angle, for example, 165 degrees. It is only doing. That is, the center axes (Y'-Y ') of the injection ends of the molten metal pouring portion 22a of the ladle 22 and the molten metal pouring portion 23a of the ladle 23 are at 165 degrees with the center line (Y-Y) of the injection cylinder 1. It is a case where it is formed so that. The molten metal pouring portion 23a of the ladle 23 shown in FIG. 4 is formed in a tubular shape.

Therefore, as shown in FIG. 5, these ladles 20, 21, 22 and 23 are used as the ladles of the automatic water heater 10 of the die casting machine to rotate the tip of the arm 7 around the rotation axis XX. When the molten metal in the ladle 20 is poured into the ladle 20 smoothly through the pouring port 2 of the injection sleeve 1, the molten metal in the ladle 20 does not bubble and is poured when the ladle 20 is poured in such a manner that the ladle 20 is rotated in the reverse direction (perpendicular to the ladle center axis ZZ). After being melted, the molten metal smoothly flows without causing turbulence in the injection sleeve 1 as shown in FIG. 9 (B). Moreover, the reversing speed for pouring the ladle can be made faster than the conventional one. Therefore, the formation of cavities and defects in the product is reduced. The die plate 8 of the die casting machine, the injection sleeve 1, and the automatic water heater 10 may have the same configuration as the conventional one.

[0014]

[Effect of device]

 As explained above, according to the ladle for changing the pouring direction of the present invention, the angle θ between the reversal direction in which the ladle is tilted for pouring and the pushing direction of the injection cylinder is close to 180 °. Since the molten metal is poured into the injection sleeve in a curved line, it is possible to improve the cycle and to reduce air entrainment, which contributes to the improvement of product quality. Further, it is possible to reduce the melting loss of the sleeve and prolong its life.

[Brief description of drawings]

FIG. 1 is a perspective view of a ladle for changing a pouring direction according to an embodiment of the present invention,

FIG. 2 is a perspective view of a ladle for changing a pouring direction according to a second embodiment of the present invention,

FIG. 3 is a perspective view of a ladle for changing a pouring direction according to a third embodiment of the present invention,

FIG. 4 is a perspective view of a ladle for changing a pouring direction according to a fourth embodiment of the present invention,

FIG. 5 is a top view showing the tip of the automatic water heater and a part of the die casting machine;

FIG. 6 is a top view showing a part of a conventional cold chamber die casting machine and a tip part of an automatic water heater.

FIG. 7 is a side view for explaining a pouring state of the ladle,

FIG. 8 is a schematic configuration diagram of an automatic hot water supply device for a die casting machine,

FIG. 9A is a perspective view for explaining a flow state of molten metal in an injection sleeve in a conventional automatic water heater.
(B) is a perspective view for explaining the state of the flow of molten metal in the injection sleeve when pouring using the ladle of the automatic water heater of the present invention.

[Explanation of symbols]

 1 Injection Cylinder 2 Pouring Port 4 Plunger Rod 5, 20, 21, 22, 23 Ladle 5a, 20a, 21a, 22a, 23a Molten Metal Pouring Section 5b, 20b, 21b, 22b, 23b Melt Measuring Section 8 Fixed Die Plate 10 Automatic Hot water supply device 11 Molten metal heat insulation furnace 12 Molten metal 13 Fixed mold

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kenichi Okabe, 1 Toyota Town, Toyota City, Aichi Prefecture, “Toyota Motor Co., Ltd.” (72) Toshiaki Moriya, 1 Toyota Town, Toyota City, Aichi Prefecture, Toyota Motor Corporation "Inside the company" (72) Inventor Shiro Uonishi "Toyota Motor Co., Ltd." 1 Toyota-cho, Toyota-shi, Aichi

Claims (1)

[Scope of utility model registration request] 1. The molten metal pouring portion of the ladle is curved so that the molten metal changes its direction toward the injection direction of the injection sleeve at an angle with the ladle molten metal pouring direction during pouring. A ladle that changes the pouring direction.