JP3716922B2 - Gravity tilting die casting machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a gravity tilting mold casting apparatus that casts a cast metal by pouring molten metal (for example, aluminum) using gravity while tilting the clamped upper and lower molds.
[0002]
[Prior art]
Conventionally, as a gravitational tilting die casting apparatus as described above, an apparatus described in JP-A-5-318090 has been publicly known. This device is configured so that the rotation of the entire mold casting device and the rotation of the upper die (opening above the lower die) are performed by a rotating shaft with the center of rotation at the same axis (outside position of the die). Has been.
[0003]
[Problems to be solved by the invention]
However, in the above apparatus, since the rotation axis for tilting the apparatus and opening / closing the upper mold is a coaxial line rotation axis, when the upper mold is opened, the upper position of the lower mold is set to the outer position to open the upper mold. It was necessary to arrange the rotating shaft. Therefore, when tilting pouring, the center of the upper and lower molds will rotate at a position away from the center of rotation, giving a large rotational inertia to the molten metal flowing in the upper and lower molds, resulting in a flow of molten metal with a large inertia, The oxide film is easily generated and entrained. In order to prevent the generation and entrainment of the oxide film, it is necessary to move the upper and lower molds without applying a large inertia. However, as in the above-described apparatus, the rotating shaft is located outside the upper and lower molds. In the configuration provided, there is a limit to minimizing the tilt radius of the upper and lower molds to slow the peripheral speed and prevent large inertia. Therefore, the tilting process time is extended, which is a problem.
In addition, since the limit of the tilt radius is minimized and the lower die lifting / lowering cylinder and the lower die casting extrusion mechanism operate in series, the lower die lower device becomes longer. The device has a large tilt radius (rotational inertia), and it is necessary to take a large installation space for installing the device. Furthermore, the height from the installation surface of the apparatus to the lower mold is high, making it difficult to insert the core and take out the casting, and there is a problem that a pit or a work table is required to facilitate workability.
[0004]
The present invention has been made to solve the above-described problems, and minimizes the tilt radius at the center of the upper and lower molds without increasing the tilting process time for the pouring speed for preventing the oxide film from being caught. In addition, when the upper mold is opened, when the upper mold is opened, the upper part of the lower mold is opened, the apparatus tilt radius is minimized, and the apparatus height is lowered to reduce the size. An object of the present invention is to provide a gravity tilting die casting apparatus that can reduce the installation space of the apparatus without impairing the workability of the core insertion and casting removal operation and can be installed without a pit.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the gravitational tilting mold casting apparatus in the present invention is an apparatus for casting a casting using an upper and lower mold that is poured using gravity and can be opened and closed and tilted. A mold opening and closing mechanism for opening and closing the upper and lower molds is configured to be tiltable by a horizontal main body rotation shaft whose center line passes through the center of gravity of the mold opening and closing mechanism and tilting means,
The mold opening / closing mechanism includes a main body frame supported by the main body rotation shaft so as to be rotatable up and down, one of which is mounted on the main body frame so that the upper and lower molds are attached. A mold and a lower mold die plate; mold clamping means that is mounted on the main body frame and moves either the upper mold or the lower mold die plate; and the upper mold and the lower mold that are mounted on the main body frame. Rotating means for vertically rotating any one of the mold die plates, and a pouring means for pouring the upper and lower molds with a ladle tilted by a ladle rotating mechanism is mounted on the main body frame. It is characterized by.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 and 2, main body rotation shafts 3 and 3 are provided on upper ends of support frames 2 and 2 erected on a base 1 so as to face each other on the same horizontal axis. A mold opening and closing mechanism 50 for opening and closing the upper and lower molds 17 and 10 is mounted between the three and the third so that the center line of the main body rotation shafts 3 and 3 passes through the center of gravity of the mold opening and closing machine 50. ing. The mold opening / closing mechanism 50 includes a lower mold die plate 6 to which the lower mold 10 is attached, electric cylinders 5 and 5 as mold clamping means for moving the lower mold die plate 6 up and down, Cylinders 5 and 5 are mounted, supported by the main body rotation shafts 3 and 3, and a main body frame 4 that can be turned up and down. The upper mold die plate 16 is provided, and a rotating means 51 for rotating the upper mold die plate 16 up and down.
[0007]
The main body frame 4 is attached to the main body rotating shafts 3 and 3 in a suspended manner. Further, a main body frame electric rotating device 19 as a tilting means for tilting the mold opening / closing mechanism 50 is attached to one of the support frames 2, and an output shaft of the main body frame electric rotating device 19 is one end of the main body rotating shaft 3. It is connected to.
[0008]
The electric cylinders 5 and 5 are provided on the bottom of the main body frame 4 so as to face upward, and the lower mold die plate 6 is connected and supported at the piston rod tip. A hollow rod 7 is connected to the center of the lower surface of the lower mold die plate 6, and the hollow rod 7 is fitted to a guide cylinder 8 provided at the bottom of the main body frame 4 so as to be movable up and down. The die die plate 6 is guided up and down.
[0009]
A lower mold casting extrusion mechanism 23 is attached to the upper part of the lower mold die plate 6, and the lower mold 10 is connected to the lower mold die plate 6 on the left and right sides of the lower mold 10 in FIG. The lower mold clamps 25 and 25 are fixed. A hollow mold extrusion cylinder 12 for operating the lower mold casting extrusion mechanism 23 is housed in the hollow portion of the hollow rod 7, and a lower mold extrusion plate 24 is connected to the tip of the piston rod. It is supported. The lower mold extruding plate 24 is disposed so as to be able to move up and down in the central opening of the lower mold die plate 6 and can be attached to and detached from the lower mold casting extruding mechanism 23 by a forced return mechanism 36. It is connected.
[0010]
Further, upper mold tilting shafts 13 and 13 are horizontally provided on the back side (right side in FIG. 2) shifted from the main body rotation shafts 3 and 3 at the upper end of the main body frame 4. An upper mold mounting frame 14 is connected to the mold tilting shafts 13 and 13 such that one end thereof is rotatable.
[0011]
An upper die die plate 16 is attached to the lower surface of the upper die mounting frame 14, and an upper die casting extrusion mechanism 26 is attached to the lower portion of the upper die die plate 16. The upper mold 17 is fixed to the left and right sides of the upper mold 17 by upper mold clamps 27 and 27 connected to the upper mold die plate 16. The upper die mounting frame 14 is provided with an upper die casting extrusion cylinder 28 for operating the upper die casting extrusion mechanism 26 so as to face downward, and the upper die is disposed at the tip of the piston rod. An upper mold extruding plate 29 arranged to be movable up and down in the central opening of the die plate 16 is connected and supported. Guide rods 30, 30 are connected to the upper surface of the upper mold extrusion plate 29, and the guide rods 30, 30 can be moved up and down on guide cylinders 31, 31 provided on the upper mold mounting frame 14. The upper die push-out plate 29 is guided to be raised and lowered.
[0012]
In the figure, reference numerals 18 and 18 denote the upper mold reversing electric cylinders, and 20 and 20 denote lock cylinders for stopping and fixing the upper mold 17 at the correct positions.
[0013]
Further, the lower mold die plate 6 is provided with a pouring means 52 for pouring the upper and lower molds 17 and 10, and in the pouring means 52, as shown in FIGS. 21 is tilted by the ladle rotation mechanism 11. That is, when the upper and lower molds 17 and 10 are brought into contact with each other, a tip is inserted into a cavity 31 that forms a casting shape, and the ladle 21 is arranged. The ladle 21 is fixed to the ladle support frames 32 and 32, The support frames 32 and 32 are rotatable by ladle rotating shafts 34 and 34 provided at the tips of the arms 33 and 33 fixed to the main body frame 4 so as to face each other on the horizontal line. Further, one of the ladle rotating shafts 34 is connected to the ladle electric rotating device 9 through a chain 35.
[0014]
The operation of the ladle rotating mechanism 11 configured as described above transmits the rotation of the ladle electric rotating device 9 to the ladle 21 through the chain 34, the ladle rotating shaft 33, and the ladle support frames 31 and 31. At this time, since the leading end portion of the ladle 21 is located on the extension line of the ladle rotating shafts 33 and 33, the ladle 21 rotates around the leading end portion.
[0015]
The operation of the thus configured will be described with reference to FIGS. First, the case where the casting is taken out by adhering to the upper mold 17 side is shown in FIGS. First, the upper and lower molds 17 and 10 are set in the gravity type tilting mold casting apparatus of the present invention, and then the upper mold clamps 27 and 27 and the lower mold clamps 25 and 25 are fastened to connect the upper and lower molds 17 and 10. Are fixed to the upper die die plate 16 and the lower die die plate 6, respectively.
[0016]
Next, the electric cylinders 5 and 5 are contracted from the state shown in FIG. 5 so that the lower die 10 is pulled down and separated from the upper die 17 to obtain the state shown in FIG. Next, after the lock cylinders 20 and 20 are actuated to release the upper die 17 from being fixed, the upper die reversing electric cylinders 18 and 18 are actuated to cause the upper die 17 to move the upper die tilt shafts 13 and 13. Inverted by 90 degrees about the center, the state shown in FIG. 7 is obtained.
[0017]
In this state, after performing auxiliary work such as inserting a core in the lower mold 10, the upper mold reversing electric cylinders 18, 18 are reversely operated to reversely reverse the upper mold 17, and then the lock cylinder 20. , 20 are reversely operated to fix the upper mold 17 to the state shown in FIG.
Next, the electric cylinders 5 and 5 are extended as shown by arrows, and the lower mold 10 is clamped to the upper mold 17 to obtain the state shown in FIG.
[0018]
Next, after the molten aluminum is supplied to the ladle 21, the main body frame electric rotating device 19 is operated and the entire device attached to the main body frame 4 is centered on the main body rotating shafts 3 and 3 as shown in FIG. Rotate 90 degrees in the pouring direction (counterclockwise direction). Since this rotation is rotated around the center of gravity of the mold opening / closing mechanism 50, the swing of the upper and lower molds 17, 10 is minimized. The speed is rotated slowly. For this reason, the molten metal poured into the upper and lower molds 17 and 10 can be poured smoothly without causing large inertia, jumping up and shaking, preventing the entrainment of air and an oxide film and smoothly pouring the molten metal.
[0019]
At this time, in a state in which the ladle 21 is fixed without rotating, the amount of molten aluminum poured from the ladle 21 to the cavity portion 31 is uniquely determined by the tilt angles of the upper and lower molds 17 and 10, while on the other hand Since the amount of molten aluminum that can be poured into the cavity 31 at the tilt angle of the molds 17 and 10 is determined by the shape of the cavity 31, the ladle electric rotating device 9 rotates as the upper and lower molds 17 and 10 tilt. The amount of molten aluminum required by the cavity 31 is poured into the cavity 31 by appropriately rotating the ladle 21 clockwise or counterclockwise. Since there is no excess or deficiency of the molten aluminum to be poured in this way, the entrainment of air and oxide film can be further prevented and the molten metal can be poured smoothly. The state of FIG. 10 in which these operations have been completed is held for a certain period of time, and waiting for the molten aluminum to solidify.
[0020]
Next, by extending the lower mold casting extrusion cylinder 12 and operating the lower mold casting extrusion mechanism 23 via the lower mold extrusion plate 24, the electric cylinders 5 and 5 are contracted to operate the lower mold 10. 11 is pulled down and separated from the upper mold 17 as shown in FIG. At this time, the casting is attached to the upper mold 17 side. Next, after the lock cylinders 20 and 20 are actuated to release the upper die 17 from being fixed, the upper die inversion electric cylinders 18 and 18 are actuated to tilt the upper die 17 as shown in FIG. The shafts 13 and 13 are inverted. Thereafter, the upper die casting extrusion cylinder 28 is extended to operate the upper die casting extrusion mechanism 26 via the upper die extrusion plate 29 to separate the casting from the upper die 17, which is not shown. Use the tray of the unloader to catch and remove the casting.
[0021]
Next, the main body frame electric rotating device 19 is operated to be in the state of FIG. 7, and auxiliary operations such as mold cleaning and core insertion are performed, and the operations of FIGS. 7 to 12 are repeated. When the casting is attached to the lower mold 17 and taken out, the operations from FIG. 5 to FIG. 10 are performed in the same manner, and then the main body frame electric rotating device 19 is operated to remove the main body frame 4 and the like from the main body rotating shaft. Inverted to a vertical state centering on 3 and 3, and the state shown in FIG. 13 is obtained. Next, when the upper mold casting extrusion cylinder 28 is extended to operate the upper mold casting extrusion mechanism 26 via the upper mold extrusion plate 29, the electric cylinders 5 and 5 are contracted and shown in FIG. Thus, the lower mold 10 is pulled down and separated from the upper mold 17.
At this time, the casting is attached to the lower mold 10.
[0022]
Next, after the lock cylinders 20 and 20 are actuated to release the upper die 17 from being fixed, the upper die reversing electric cylinders 18 and 18 are actuated to cause the upper die 17 to move the upper die tilt shafts 13 and 13. Invert around the center. Next, the lower mold casting extrusion cylinder 12 is operated by extending the lower mold casting extrusion cylinder 12 to operate the lower mold casting extrusion mechanism 23 via the lower mold extrusion plate 24, and then the casting is removed by a casting removal apparatus (not shown). It becomes a state. Thereafter, auxiliary operations such as mold cleaning and core insertion are performed, and the above operation is repeated.
[0023]
In the above embodiment, the main body frame 4 is positioned by a positioning stopper (not shown) at times other than rotation and tilting.
[0024]
In the embodiment of the present invention, the upper die die plate 16 is rotatable and the lower die die plate 6 is moved straight. However, the type and direction of movement of each die plate 16, 6. However, the present invention is not limited to this, and for example, the lower mold die plate 6 may be rotatable, and the upper mold die plate 16 may be moved straightly.
[0025]
In addition, in the embodiment of the present invention, the guide rod that guides the raising and lowering of the lower die die plate 6 is the hollow rod 7, and the lower die casting extrusion cylinder 12 is built in the hollow portion of the hollow rod 7. However, a commercially available cylinder may be purchased and used for the lower die casting extrusion cylinder.
[0026]
【The invention's effect】
As is apparent from the above description, the present invention is an apparatus for casting a casting using an upper and lower mold that is poured using gravity, and that can be opened and closed and tilted, and that opens and closes the upper and lower molds. The mold opening / closing mechanism is configured to be tiltable by a horizontal main body rotating shaft whose center line passes through the center of gravity of the mold opening / closing mechanism and tilting means, and the mold opening / closing mechanism can be rotated up and down with respect to the main body rotating shaft. A main body frame that is supported in this manner, an upper mold and a lower mold die plate to which either one of the main body frame can be vertically rotated and the upper and lower molds are attached, and the main body frame. A mold clamping means for moving one of the upper mold and the lower mold die plate, and a rotating means for rotating one of the upper mold and the lower mold die plate mounted on the main body frame. and, with a, Since the pouring means for pouring the upper and lower dies comprises a ladle that is tilted by dollar rotation mechanism mounted to the body frame, when opening the upper die, both can be the lower mold upward to open pouring In order to minimize the swing of the upper and lower molds and slow down the peripheral speed so as not to have a large inertia , and because the ladle can be rotated independently of the tilting movement of the upper and lower molds, the molten aluminum can be used without excess or deficiency. Since pouring can be performed, air and oxide film can be prevented from being caught in the molten aluminum. In addition, the installation space of the apparatus can be reduced by minimizing the swing of the entire apparatus.
[Brief description of the drawings]
FIG. 1 is a front view of a schematic configuration showing an embodiment of the present invention.
FIG. 2 is a side view of FIG.
3 is a transverse sectional view of a ladle rotating mechanism 11 in FIG. 1. FIG.
4 is a longitudinal sectional view of a ladle rotating mechanism 11 in FIG. 1. FIG.
FIG. 5 is a front view showing a state where upper and lower molds are set in the gravity tilting mold casting apparatus of the present invention.
FIG. 6 is a front view showing a state where the lower mold is pulled down and separated from the upper mold.
FIG. 7 is a front view showing a state in which the upper mold is inverted by 90 degrees about the upper mold tilting axis.
FIG. 8 is a front view showing a state where the upper mold is fixed after reversely inverting the upper mold.
FIG. 9 is a front view showing a state in which a lower mold is clamped to an upper mold.
FIG. 10 is a front view showing a state where the entire apparatus attached to the main body frame is rotated 90 degrees in the pouring direction.
FIG. 11 is a front view showing a state where the lower mold is pulled down and separated from the upper mold.
FIG. 12 is a front view showing a state in which the upper mold is inverted about the upper mold tilting axis.
13 is a front view showing a state in which the main body frame 4 and the like are inverted to a vertical state after the state shown in FIG. 10;
FIG. 14 is a front view showing a state where the lower mold is pulled down and separated from the upper mold.
FIG. 15 is a front view showing a state in which the upper mold is inverted about the upper mold tilting axis.
[Explanation of symbols]
3 Main body rotating shaft 4 Main body frame 5 Electric cylinder 6 Lower mold die plate 10 Lower mold 16 Upper mold die plate 17 Upper mold 19 Main frame electric rotating device 50 Mold opening / closing mechanism

Claims (4)

An apparatus that casts castings using upper and lower molds that are poured using gravity and that can be opened and closed and tilted,
A mold opening and closing mechanism for opening and closing the upper and lower molds is configured to be tiltable by a horizontal main body rotation shaft whose center line passes through the center of gravity of the mold opening and closing mechanism and tilting means,
The mold opening / closing mechanism is
A main body frame supported by the main body rotation shaft so as to be rotatable up and down;
An upper mold and a lower mold die plate on which either one of the upper and lower molds is mounted, and either one of the main body frame is mounted so as to be rotatable up and down;
Mold clamping means mounted on the main body frame to move one of the upper mold and the lower mold die plate;
A rotating means that is mounted on the main body frame and vertically rotates one of the upper mold and the lower mold die plate;
With
A gravity-type tilting mold casting apparatus characterized in that a pouring means for pouring the upper and lower molds with a ladle tilted by a ladle rotating mechanism is attached to the main body frame. In the gravity tilting die casting apparatus according to claim 1,
The gravity-type tilting mold casting apparatus, wherein the mold clamping means raises and lowers the lower mold die plate by an electric cylinder. In the gravity tilting die casting apparatus according to claim 1 or 2,
The said rotation means rotates either one of the said upper metal mold | die and an upper metal mold attachment frame with an electric cylinder, The gravity type tilting mold casting apparatus characterized by the above-mentioned. An apparatus that casts castings using upper and lower molds that are poured using gravity and that can be opened and closed and tilted,
A mold opening / closing mechanism for opening and closing the upper and lower molds is configured to be tiltable by a horizontal main body rotation shaft having the center substantially the same as the center of the closed upper and lower molds, and tilting means,
The mold opening / closing mechanism is
A main body frame supported by the main body rotation shaft so as to be rotatable up and down;
An upper mold and a lower mold die plate on which either one of the upper and lower molds is mounted, and either one of the main body frame is mounted so as to be rotatable up and down;
Mold clamping means mounted on the main body frame to move one of the upper mold and the lower mold die plate;
A rotating means that is mounted on the main body frame and vertically rotates one of the upper mold and the lower mold die plate;
With
A gravity tilting mold casting apparatus characterized in that a pouring means for pouring the upper and lower molds is attached to the main body frame.

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