JP2746814B2 - Rotary gravity mold casting machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to rotary casting, in which a mold is provided for an upper die, a lower die, and a horizontal die to form a gate and a feeder formed by a casting method according to the shape of various castings. Even so, the present invention relates to a rotary gravity mold casting machine capable of performing casting by giving rotation control under optimum conditions of the casting shape plan by one unit.

[0002]

2. Description of the Related Art Conventionally, a rotary gravity mold casting machine of this kind has been designed to be a dedicated machine even when the rotation angle of a rotating frame rotatably mounted on a base is about 90 degrees and the rotation range is large. It was fixed to the operation decided as, and various casting shapes were supported by many casting machines. In the casting machine, the movable die plate and the fixed die plate are vertically opposed to each other, so when removing the cast product after casting is completed, the cast product is lifted together with the upper die and placed adjacently. The take-out machine was horizontally moved, removed from the mold and taken out.

[0003]

As described above, in the conventional rotary gravity mold casting machine, the movable range and the movable system are limited. Therefore, a casting plan is set within the limited range to ensure casting quality. In order to do so, casting has been performed by arranging a lot of feeders, vents, and the like. For this reason, depending on the type and shape of the cast product, the amount of the riser and the excess wall thickness are large, the mold structure becomes complicated, and a dedicated casting machine corresponding to the cast product is required. In addition, in the conventional casting machine, the die plate is disposed vertically, so that the cast product is taken out in a horizontal direction, so that a special take-out machine is required. There is a point, and it is necessary to turn to the opposite side of the casting machine when opening the mold in order to check the matching condition of the upper mold attached to the movable die plate and the lower mold fixed to the fixed die plate during casting However, there is a problem that the quality cannot be sufficiently confirmed because the shot cannot be rotated for each shot. In addition, there is a problem that, for example, distortion occurs when the cast product is removed along with the upper mold.

[0004] The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a rotary gravity mold casting machine which can substantially cope with casting schemes corresponding to the shapes of various castings. It is intended for.

[0005]

SUMMARY OF THE INVENTION In order to solve the above technical problems, the present invention relates to an upper die plate and a movable die plate of a machine frame comprising an upper die plate, a lower die plate, and a movable die plate provided therebetween. casting mold of the upper mold, mounting the lower mold and horizontal, in and clamping each of these mold gravity die casting machine for casting by gravity, the
The lower mold of the casting mold is located at the center of the movable die plate.
And the horizontal type is divided into a plurality of divided elements.
And the upper mold is provided so as to be able to contact and separate around the lower mold.
Is rotatably provided on the upper part of the horizontal type, and the upper side of the horizontal type is
Release position and close the upper side of the horizontal type and cavity
Pivotably and clamping position for forming the provided, the machine frame before
With the casting mold as the center, the upright position is
It is provided so as to be rotatable in a range of approximately 180 degrees before and after, and can be set to be rotatable at an arbitrary rotation speed in an arbitrary angle range of the 180 degrees range based on the casting bill of the casting mold. It is a rotary gravity mold casting machine.

[0006]

According to the above construction, according to a casting plan of various casting shapes, it is possible to perform casting by giving rotation control of optimum conditions suitable for the casting shape to the casting mold.

[0007]

FIG. 1 is a front view of a rotary gravity mold casting machine 1 (hereinafter simply referred to as a casting machine), and FIG. 2 is a plan view of the casting machine. The right and left sides of the base 2 correspond to the footrests 3 having a predetermined height.
The rotary drive unit 4 is provided on the leg base 3 in a corresponding manner, and the rotary drive unit 4 is provided with a hydraulic cylinder 6 as a drive source as shown in the figure. Also,
A rotating shaft 5 whose rotation is controlled by the rotating drive device 4 is provided on the facing surface side of the rotating drive device 4 so as to face each other, and a rotating machine frame 10 is mounted between the rotating shafts 5.

The rotating machine frame 10 is formed by a left and right side plate 11, an upper die plate 12, and a lower die plate 13, and the upper die plate 12 has a short width of left and right die plates 12a and 12a as shown in FIG. 12b, and an upper die 21 is provided between the plates 12a and 12b.
The fitting portion 14 having a predetermined width is formed so that the mounting plate 31 can be fitted. The distance between the upper and lower die plates 12a, 12b and the lower die plate 13 is 4
A tie bar 15 is attached, and a movable die plate 16 is attached to the tie bar 15 so as to be able to move up and down.

The movable die plate 16 is formed in a substantially square shape, and the lower surface of the movable die plate 16 has piston rods 17a of left and right lifting cylinders 17 erected on the lower die plate 13.
The lower die 19 and the horizontal die 20 constituting the casting die 18 are disposed on the movable die plate 16.

The casting mold 18 is for molding, for example, a tire wheel made of aluminum, and comprises a lower mold 19, a horizontal mold 20 and an upper mold 21 as shown in FIG. The horizontal die 20 is formed into four divided elements 20a divided vertically. The lower die 19 is attached to the upper surface of the central part of the movable die plate 16 by a lower die clamping device 22 attached to the lower surface. The lower mold clamping device 22 includes a support plate 24 of the support member 23.
A clamping cylinder 25 is attached to the lower mold 19.
An operating member 26 for detachably fixing the mounting member 26 is attached.

At a predetermined position on a diagonal portion of the movable die plate 16, a four-divided horizontal type divided element 20 a
Is provided so as to be able to contact and separate from the lower mold 19 at the center.
A support bracket 27 is provided at a predetermined position on the diagonal line of the movable die plate 16, and a horizontal operating cylinder 2 is provided at a vertical portion of the support bracket 27.
8 are mounted horizontally, and the splitting elements 20a are detachably mounted on the ends of the piston rods, and the operating cylinders 28 are extended in synchronism, so that the splitting elements 20a move the movable die plate 16 The horizontal mold 20 is formed by being slid on four sides of the lower mold 19, and is separated from the lower mold 19 by a shortening operation so as to be able to remove the casting. An upper actuator 30 is attached to the fitting portion 14 between the upper die plates 12a and 12b.

The upper die operating device 30 comprises an upper die mounting plate 31 for mounting the upper die 21 and an upper die operating cylinder 36. The upper die mounting plate 31 is
And upper arms 32a and 33b attached to the left and right sides thereof.
An upper die clamping device 34 for detachably mounting the upper die 21 is mounted on the upper surface side of the upper die plate 32. The left and right operating arms 33a, 33b are connected to the upper die plate 12a,
12b is pivotally attached to a rotation support portion 35 attached to the lower surface on the rear side.

The one operating arm 33a is formed to extend longer than the pivot point than the other operating arm 33b,
An upper die operating cylinder 36 is mounted between the end and the lower part of the rotating machine frame 10, and the base side of the cylinder 36 is attached to a mounting bracket 37 provided at a predetermined position on the lower side of the rotating machine frame 10. The piston rod 36a is pivotally connected, and the distal end side of the piston rod 36a is pivotally connected to the extension end of the operating arm 33a. When the operating cylinder 36 of the upper die operating device 33 thus formed is extended, the upper die mounting plate 31 is turned around the rotation support portion 35 and is accommodated in the fitting portion 14. As shown in FIG.
0 is closed, and the molded convex portion 21a is inserted into the horizontal die 20 to form the cavity 18a. When the operating cylinder 36 is shortened, the upper mold mounting plate 31 is moved to the rotation support portion 35.
Is provided so as to rotate upward at an angle of approximately 90 degrees with the center as the center, and is configured to be separated from the set position of the cavity 18a. Also, the left and right upper die plates 12
At predetermined positions of a and 12b, an upper lock mechanism 38 for pressing and fixing the upper plate 32 to prevent the lower die 19 from floating during pouring is detachably attached.

The mold casting machine 1 provided in this way controls the rotation driving device 4 by a control device (not shown), and the rotating machine frame 10 shown in FIG.
For example, as shown in FIG. 4, it is possible to rotate +90 degrees counterclockwise to the rear side around the rotation shaft 5, and further from the erect state to the clockwise front side (the worker side) as shown in FIG. Is rotatably provided in a rotation range of 180 degrees, and is provided to be rotatable from a tilt position in an appropriate position within the 180 degree range to a predetermined angle position. The rotation speed is provided so that it can be set arbitrarily.

Next, a case where a wheel is cast by the casting die 18 shown in FIG. 7A by the die casting machine 1 constructed as described above will be described. 19, a horizontal die 20, and an upper die 21. Of these, the horizontal die 20 is formed into four parts vertically,
As shown in the figure, at a predetermined position of the horizontal die 20 and the upper die 21, a gate 40 is formed which opens upward and communicates with the rim portion of the wheel of the cavity 18a. Each of the molds 19.20, 21 formed in this way is mounted at a respective set position. In this case, the movable die plate 16 is set at a predetermined height position, and the upper die operating cylinder 36 is shortened to thereby cause the upper die mounting plate 31 to jump upward by about 90 degrees around the rotation support part 35. As a result, the fitting portion 14 is opened, so that the lower element 19 and the split element 20a of the horizontal type 20 can be easily attached.

After the molds 19, 20, and 21 have been mounted in this manner, when the horizontal operating cylinder 28 is operated, each of the split elements 20a is positioned and set on the four circumferences of the lower mold 19 and the upper mold is operated. When the cylinder 36 is extended, the upper mold 21 is formed from the upper part of the horizontal mold 20 by the forming convex portion 21a.
Is inserted and the casting mold 18 is assembled to form the cavity 18. In this state, the upper mold locking mechanism 38 is operated, the upper mold mounting plate 31 is solidified, and the casting mold 18 is clamped.

In this state, when the rotary drive unit 4 is operated to rotate the rotary machine frame 10 to the -90 degree side to the state shown in FIG. 5, the casting mold 18 is also rotated 90 degrees, and FIG. State. In this state, a hopper 41 is attached to the sprue 40 as shown, and a predetermined amount of molten metal is supplied to the hopper 41. Thereafter, the rotation drive device 4 is operated to gradually rotate in the original erect direction. In this case, the rotation is performed in approximately 15 seconds between the rotation speeds of the casting method, for example, between −90 degrees and −60 degrees, and approximately 10 seconds from −60 degrees to the 0 ° position of the upright position. Is set to work. Thereby, the molten metal in the hopper 41 is injected into the cavity 18a, and a predetermined tire wheel can be formed according to a predetermined casting method. After a predetermined time has elapsed, the upper mold locking mechanism 38 is released, and then the upper mold operating cylinder 36 is shortened and the upper mold mounting plate 31 is flipped up and rotated.
When the horizontal operating cylinder 28 to which each of the split elements 20a of the horizontal die 20 is attached is shortened, the cast product is placed on the lower die 19, and the left and right directions and the upper side thereof are open. A cast product can be easily taken out from a predetermined direction without being distracted by a horizontal demolding device, and a cast product of product quality and shape quality based on a casting plan can be formed. .

FIG. 8 shows a casting mold 18 for molding a tire wheel similar to the above embodiment. In this case, the casting mold 18 is based on another casting method. In this case, as shown in FIG. The gate 41 may be formed at a predetermined angle from the side toward the wheel portion of the tire wheel, for example, at an angle of 60 degrees. In this case, as shown in FIG. When the machine frame 10 is tilted approximately 30 degrees to the -90 degrees side shown in FIG. 5 from the upright state, the hopper 41 attached to the gate 40 is positioned horizontally. In this state, a predetermined amount of molten metal is supplied. Thereafter, the rotation drive device 4 is operated to rotate the rotating machine frame 10 gradually 120 degrees in the upright direction. The rotation in this case is a rotation speed which is a casting method, for example, approximately 25 seconds from -30 degrees to 0 degrees, and approximately 55 seconds from the 0 degrees position of the erect position to the +90 degrees position in FIG. Is set to rotate. This allows hopper 4
1 is injected into the cavity 18a to form a predetermined tire wheel according to a predetermined casting method. Thereafter, the cast product is taken out in the same manner as in the above embodiment.

[0019]

As described above, the present invention is particularly applicable to machine frames.
With the casting mold as the center and the upright position via the rotary drive.
Since it is rotatable in a range of about 180 degrees before and after the casting , the same rotary gravity mold casting machine can be used to tilt and rotate the casting under various optimum conditions for various casting shapes under the optimum conditions. The casting speed can be set at the dynamic speed, and the casting mold is open at the left and right sides and the upper side of the lower mold four-way horizontal and upper molds. A cast product can be easily taken out without being restrained from a predetermined direction without distortion or the like, and a cast product having a product quality and a shape quality based on a casting plan can be formed.

[Brief description of the drawings]

FIG. 1 is a front view of a rotary gravity mold casting machine.

FIG. 2 is a plan view of FIG.

FIG. 3 is a left side view of FIG.

FIG. 4 is a view showing a state in which the rotating machine frame is rotated 90 degrees counterclockwise in FIG. 3;

FIG. 5 is a view showing a state in which the rotating machine frame is rotated clockwise by 90 degrees in FIG. 3;

FIG. 6 is a rear view of the rotary gravity mold casting machine.

FIG. 7 is a cross-sectional view of one embodiment of a casting mold, and is an explanatory view corresponding to rotation of a rotating machine frame.

FIG. 8 is another sectional view showing a casting mold, corresponding to the rotation of the rotating machine frame.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 rotary gravity mold casting machine 4 rotary drive device 5 rotary shaft 10 rotary machine frame 12a, 12b upper die plate 13 lower die plate 16 movable die plate 18 casting die 18a cavity 19 lower die 20 horizontal die 20a split element 21 upper die

Claims (1)

(57) [Claims] An upper die and a movable die plate of a machine frame comprising an upper die plate, a lower die plate, and a movable die plate provided therebetween;
In a gravity mold casting machine in which a lower mold and a horizontal mold are attached, and these molds are clamped and cast by gravity, the lower mold of the casting mold is located at the center of the movable die plate.
The horizontal type is divided into multiple
Formed on the element and provided detachably around the lower mold,
The upper mold is provided rotatably on the upper part of the horizontal mold,
A position releasing the side cavity and closed upper side of the horizontal
The machine frame is provided rotatably in a substantially 180-degree range before and after the erect position through a rotary drive device, with the mold frame being the center, and A rotary gravity die casting machine characterized in that it can be set to be rotatable at an arbitrary rotation speed within an arbitrary angle range of the 180-degree range based on a casting bill of a casting mold.