JP3151694B2 - Vibration device for casting sand filling table - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibrating device for a molding sand filling table for filling molding sand in vanishing model casting or molding of a self-hardening mold.

[0002]

2. Description of the Related Art Conventionally, as a method of casting a disappearing model casting or a self-hardening mold, a method of placing a casting frame on a vibrating table and fixing the casting table by vibrating the vibrating table has been generally employed. I have.

[0003] An example of this filling method will be described.
As shown in FIGS. 5 and 6, a table 3 is swingably disposed on a machine base 1 via springs 2 and 2, and two tables having a horizontal axis parallel to the Y axis on a lower surface of the table 3. By attaching the vibration motors 4 and 4 and rotating the vibration motors 4 and 4 in directions opposite to each other, the table 3 and the casting flask 5 mounted and fixed on the table 3 are vibrated in the Z-axis direction.
A vibrating device configured to fill casting sand 7 around the disappearing model 6 is used.

As shown in FIGS. 7 and 8, in addition to the vibration motors 4 and 4, the table 3 has a horizontal axis parallel to the two vibration motors 4 and 4, that is, the Y axis. Two vibrating motors 8 having a vertical axis parallel to the Z axis are additionally fixed to both sides in the direction orthogonal to each other.
8 in opposite directions to rotate the table 3 to X
Vibration in the axial direction, that is, the direction perpendicular to the parallel horizontal axis of the two vibration motors, is applied to vibrate the flask 5 in two directions, the Z-axis direction and the Y-axis direction. Is filled with a casting sand 7.

[0005]

However, in a vibration device provided with two vibration motors 4 and 4 having a horizontal axis parallel to the Y axis on the lower surface of the table 3, the table 3 has a Z axis direction (vertical direction). ) Can be generated, but when the vanishing model has a horizontal hole or a horizontal depression, etc., it is not possible to expect a sufficient filling action just by flowing the molding sand up and down. . In addition, a horizontal axis parallel to the two vibration motors 4 and 4 of the table 3, ie, Y
In the case of a vibration device in which two vibration motors 8 having a vertical axis parallel to the Z axis are additionally fixed to both sides in a direction perpendicular to the axis, vibration in the Z axis direction (vertical direction) and Y axis direction (In a direction perpendicular to the parallel horizontal axis of the two vibration motors 4 and 4), and a vibration of 1
Vibration in two directions, one in the horizontal direction and one in the horizontal direction, can be applied. However, when the horizontal model has horizontal holes or horizontal depressions in the vanishing model, the casting sand is simply moved in each of the upper and lower directions. However, it is not possible to expect a sufficient filling effect simply by making the fluid flow.

[0006] Since this was confirmed by the following experiment, an explanation will be added. The filling experiment of the casting sand was performed using the experimental apparatus shown in FIG. That is, in the experimental apparatus, the test piece 9 is set inside the casting flask 5 having a side length W of 300 mm and a height H of 400 mm, and the surrounding area is filled with molding sand 7. The test piece 9 is made of a transparent acrylic resin and has a uniform inner diameter (d1 = 25 mmφ).
And a uniform inner diameter (d2 = 15 mmφ) and length (L = 90 mm) branched from the main pipe section 9A having an axis C2 orthogonal to the axis C1 of the main pipe section 9A. Of the main pipe 9A.
1 is vertically oriented, and the axis C2 of the branch pipe portion 9B is
Is set to a predetermined depth (D = 225 mm) from the top surface 7A, and the upper end of the main pipe portion 9A protrudes from the top surface 7A of the molding sand 7.

[0007] Such an experimental apparatus is mounted and fixed on the table 3 of the first embodiment shown in FIGS.
Table 1 shows the measurement results when the time was set to seconds. In the conventional vibration device corresponding to Table 1, it was confirmed that the inflow amount of the molding sand 7 in the X-axis direction was relatively low. This means
If a hole in the X-axis direction is formed in the disappearance model 6, it indicates that it is not possible to secure a sufficient density of sand filling in the hole.

According to the present invention, in a vibration device provided with two vibration motors at a lower portion of a table, molding sand can be filled at a high density around a disappearing model, particularly, in a horizontal hole or a lateral depression of the disappearing model. Further, in a vibration device having two vibration motors added to both sides of the table, it is another object of the invention to further enhance the filling effect.

[0009]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is a vibrating apparatus for a molding sand filling table fixed on a top surface so as to be detachable from a casting frame, and is provided on a machine base via a spring. And a table movably disposed on the table, and two vibration motors attached to a lower portion of the table with a parallel horizontal axis and rotating in the same direction. The vibration generated by one of the vibration motors is provided. And the vibration generated by the other vibration motor is configured to simultaneously generate two directions of vibration in a direction perpendicular to the table and in a horizontal direction orthogonal to a parallel horizontal axis of the two vibration motors. , Took the measure.

In the present invention, the table 2
Two vibration motors mounted with parallel vertical axes on opposite sides orthogonal to the parallel horizontal axis of the two vibration motors and rotating in opposite directions to each other,
It is preferable to add vibration in one horizontal direction orthogonal to the parallel horizontal axis direction of the two vibration motors.

[0011]

According to the present invention, a vibrating device mounted on a lower portion of a table with a parallel horizontal axis and rotating two vibration motors in the same direction by rotating the two vibration motors in opposite directions. In this case, vibrations in the vertical direction and the horizontal one direction perpendicular to the parallel horizontal axes of the two vibration motors can be simultaneously generated on the table. Thereby, first, a vertical flow is given to the molding sand of the flask, and the molding sand is densely filled in a vertical direction with respect to the periphery of the lost model of the flask, and the two units By applying a flow in the horizontal direction perpendicular to the parallel horizontal axis of the vibration motor, the filling density in the horizontal direction for the disappearing model is increased, and high-density filling is performed in the horizontal holes and lateral dents of the disappearing model. Can be done.

In general, when the table is vibrated up and down by one vibration motor at the lower part of the table, the actual center of gravity of the upper casting frame (including the vanishing model) (the upper and lower center to the lower part in a front view). Position, approximately at the center of the left and right, varies depending on the casting flask and the vanishing model), but it is actually impossible to position it directly above the vibration source, so the casting flask shakes around its center of gravity. Will occur. However, according to the present invention, since the two vibration motors are mounted and arranged with a horizontal axis parallel to the lower portion of the table, such unexpected vibrations do not first occur. In addition, vibrations in two directions, that is, a vertical direction and a horizontal direction with respect to the molding sand can be effectively applied.

[0013] Further, two tables which are attached with parallel vertical axes to both sides of the table in a direction orthogonal to the parallel horizontal axes of the two vibration motors and rotate in opposite directions to each other. If a vibration motor is provided,
Horizontal 1 perpendicular to the parallel horizontal axis direction of the vibration motor
Direction vibration can be added, so that
The casting sand can be given fluidity in three directions, vertical and horizontal, so that even if the disappearing model has horizontal holes and horizontal depressions in different directions, high density filling for these The effect is obtained.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing the first embodiment, and FIG. 2 is a plan view of FIG. In the same or equivalent parts as the conventional example,
The description is given with the same reference numerals. 1 and 2, a table 3 is horizontally and swingably disposed on a machine base 1 via springs 2 and 2, and two tables having a horizontal axis parallel to the Y axis are provided on the lower surface of the table 3. The vibration motors 4 and 4 are attached. In the casting flask 5, a casting sand 7 is filled, and a disappearing model 6 (naturally having irregularities, side holes (holes) on the surface) is installed inside the casting sand 7.

In such a configuration, when the vibration motors 4 and 4 are rotated in the same direction, the table 3 and the flask 5 mounted and fixed on the table 3 are moved vertically (Z axis) and horizontally (X axis). ), That is, simultaneously vibrate in two directions perpendicular to the horizontal axis (parallel to the Y axis) of the two vibration motors 4 and 4. At this time, since the two vibration motors are mounted and arranged with a horizontal axis parallel to the lower portion of the table, the casting sand is prevented from generating such an unexpected shake. Can be applied in two directions, a vertical direction and a horizontal direction.

As “Comparative Experimental Example 1”, the experimental results shown in FIG. 9 are mounted on the table 3 of FIGS. 1 and 2 and the measurement results when the vibration time is set to 10 seconds are shown in Table 2. Show.

In Table 2, it was confirmed that the inflow in the X-axis direction was significantly increased as compared with the measurement results of the first conventional example (Table 1). This proves that even if a hole in the X-axis direction is formed in the vanishing model, a sufficient filling density of the molding sand 7 can be secured in the hole.

FIG. 3 is a front view showing the second embodiment, and FIG. 4 is a plan view of FIG. The same or corresponding parts as in the first embodiment are denoted by the same reference numerals. In this embodiment, in addition to the first embodiment, on both sides of the table 3, that is, on both sides of the table 3 in a direction orthogonal to a parallel horizontal axis of the two vibration motors 4 and 4, Parallel vertical axes (Z
(Parallel to the axis) and two vibration motors 8, 8 rotating in opposite directions to each other. In such a configuration, when these vibration motors 8 and 8 are vibrated in directions opposite to each other, the table 3 and the table 3
A vibration in one horizontal direction (parallel to the Y axis) orthogonal to the parallel horizontal axis direction of the two vibration motors can be applied to the flask 5 mounted and fixed on the table 3.
Combined with the vibrations of the vibration motors 4 and 4, the vertical direction (Z-axis direction) and two horizontal directions (X-axis and Y-axis directions)
Vibration can be applied simultaneously in three directions.

As "Comparative Experimental Example 2", the experimental apparatus shown in FIG. 9 was mounted and fixed on the table 3 shown in FIGS. 3 and 4, and the flow rate in the X-axis direction was measured when the vibration time was set to 10 seconds. Table 3 shows the results and the measurement results of the inflow amount in the Y-axis direction when the test piece 9 of the experimental apparatus of FIG. 9 is rotated by 90 degrees around the axis G1 of the main pipe section 9A.

In Table 3, there is no large difference in the inflow amount in the X-axis direction as compared with the measurement result of the first embodiment (Table 2).
Inflow in the axial direction can be secured. This is the disappearance model 6
It is proved that even if holes or depressions are formed in the X-axis direction and the Y-axis direction, a sufficient filling density of the molding sand 7 can be ensured in these holes and depressions.

In the above-described experimental example, the present invention is applied to filling of molding sand in vanishing model casting. However, the present invention is applicable to the molding of a self-hardening mold, and the same operation and effect as in the above-mentioned experimental example can be obtained. The effect can be achieved.

[0022]

According to the present invention, the two vibration motors arranged in parallel in the lower portion of the table rotate in the same direction, so that the casting frame is almost perpendicular to the molding sand with almost no shaking (swaying). Vibration in two directions in the horizontal direction perpendicular to the horizontal axis of the two vibration motors can be applied, and high-density filling can be applied not only to the smooth peripheral surface of the disappearing model, but also to the horizontal holes and horizontal depressions. And a remarkable effect that can be achieved.

[0023] Further, two tables mounted on the table with parallel vertical axes on both sides in a direction orthogonal to the parallel horizontal axes of the two vibration motors and rotating in opposite directions to each other. If a vibration motor is provided,
Horizontal 1 perpendicular to the parallel horizontal axis direction of the vibration motor
The direction, that is, the horizontal direction obtained by rotating the two vibration motors arranged in parallel in the lower part of the table in the same direction is 9
Horizontal vibrations in directions different by 0 degrees can be added, so that two vibration motors arranged in parallel in the lower part of the previous table rotate in the same direction, so that two vertical and horizontal
There is an advantage that vibrations can be simultaneously applied in three directions, that is, in three directions, so that the filling of lateral holes, depressions and the like directed in different directions on the surface of the disappearing model can be more effectively achieved.

[Brief description of the drawings]

FIG. 1 is a front view showing a first embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a front view showing a second embodiment of the present invention.

FIG. 4 is a plan view of FIG. 3;

FIG. 5 is a front view showing a first conventional example.

FIG. 6 is a plan view of FIG. 5;

FIG. 7 is a front view showing a second conventional example.

FIG. 8 is a plan view of FIG. 7;

FIG. 9 is a perspective view of an experimental apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Machine stand 2 Spring 3 Table 4 Vibration motor (lower part of table) 5 Cast frame 8 Vibration motor (side of table)

────────────────────────────────────────────────── (5) References JP-A-5-309446 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B22C 11 / 00-25 / 00 B06B 1 / 00-3/04

Claims (2)

(57) [Claims] 1. A vibrating device for a molding sand filling table fixed removably to a casting frame on an upper surface, the table being movably disposed on a machine base via a spring, and a table parallel to a lower portion of the table. And two vibration motors mounted with different horizontal axes and rotating in the same direction. The vibration generated by one vibration motor and the vibration generated by the other And said 2
A vibration device for a molding sand filling table configured to simultaneously generate two horizontal vibrations in one horizontal direction perpendicular to a parallel horizontal axis of a vibration motor. 2. Two tables mounted on the table with parallel vertical axes on opposite sides of the table in a direction perpendicular to the parallel horizontal axes of the two vibration motors and rotating in opposite directions to each other. 2. The vibration device for a molding sand filling table according to claim 1, further comprising a vibration motor, wherein vibrations in one horizontal direction orthogonal to a parallel horizontal axis direction of said two vibration motors are added.