JP2680786B2 - Foundry sand filling device in casting method of disappearing model - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a vanishing model, especially a strain resistant model.
In the most suitable casting method for vanishing models with poor durability and deformation resistance
Casting sand filling device .

[0002]

2. Description of the Related Art Conventionally, for example, in a casting method using a vanishing model (vanishing model casting method), sand grains such as dry silica sand are not excessively deficient around the vanishing model disposed in a metal frame. Need to be filled. A number of inventions have been proposed as an automatic foundry sand filling device for filling the sand grains easily and reliably, and an example thereof will be outlined. (1) There is a foundry sand filling device disclosed in Japanese Unexamined Patent Publication No. 5-38554, and vibration motors are provided in the three-dimensional X-, Y-, and Z-axis directions on the movable table to impart three-dimensional vibration to the movable table. This is the configuration. (2) There is a casting method using an extinguishing model of Japanese Patent Laid-Open No. 5-138299, and the same configuration as that of (1) is adopted. (3) There is a vibration control method and a molding sand filling device in Japanese Patent Laid-Open No. 5-277634, and a movable table is provided with vibration motors in the three-dimensional X, Y, and Z axis directions, respectively. A method and apparatus for applying a three-dimensional vibration to the movable table and feeding back the vibration frequency and the exciting force of each vibration motor. (4) There is a three-dimensional vibrating sand filling machine for casting disclosed in JP-A-5-309446, and for the purpose of applying vibration in the X and Y directions to the metal frame base plate (movable table), This is a configuration in which two vibration motors are arranged in the direction opposite to the side ends.

[0003]

Each of the inventions outlined above employs a configuration in which the vibration motor is devised and created to impart a three-dimensional vibration force to the movable table. Certainly, the effect that three-dimensional vibration is applied to the movable table can be considered on one side. However, in the configuration in which the respective vibration motors are respectively arranged on both side surfaces and the bottom surface of the movable table, that is, in the so-called three-dimensional direction, the plane sand vibration in the X and Y axis directions and the vertical vibration in the Z axis direction are applied to the molding sand. When,
A precise three-dimensional vibration does not occur, only by applying a vibration force of In particular, the inclination of 45 ° which is the object of the present invention
Horizontal vibration by two vibration motors installed at an angle and close to
Up and down (vertical) vibration of two motors installed at a distance
It is possible to achieve a resonance phenomenon (resonance waveform) that is matched by
Is impossible at all.

[0004]

The present invention produces a resonance phenomenon.
The following constitution is adopted for the purpose of providing a useful vibration flow state to the foundry sand layer, and utilizing this characteristic to ensure reliable and precise filling of the foundry sand.

That is, in the method for casting a vanishing model according to the present invention,
The foundry sand filling device is provided with a metal frame base plate, which is arranged on a base via a cushioning material and which is provided with vibrations in the three-dimensional X, Y, and Z axis directions, and a metal base plate on the metal frame base plate. A molding sand filling device composed of a metal frame in which a vanishing model to be mounted is embedded, and when attaching a vibration motor to a metal frame base plate of the molding sand filling device, two vibration motors are used. In a direction opposite to the side edge of the horizontal bottom surface of the metal frame base plate , and with respect to the horizontal bottom surface of the metal frame base plate.
Provided at an inclination angle of 45 °, and the horizontal bottom surface of the metal frame base plate
Two vibration motors are installed in close proximity to the
Structure characterized by arranging them side by side approximately in the center of the plate
It is .

[0006]

First of all, a small amount of molding sand is filled in the metal frame clamped on the metal frame base plate (the clamp is operated if necessary), but if necessary, four motors are driven, In some cases, the filled foundry sand may be flattened. Subsequently, the fusible runner and the fusible model (hereinafter simply referred to as the fusible model ) are placed, and then the molding sand is filled again to make the model and the like almost buried. And
The four vibration motors are driven simultaneously. Specifically, with a tilt vibration vector of approximately 45 ° generated by two vibration motors provided in the direction opposite to the side ends, the metal frame base plate is given a swinging motion about its center, and the metal frame Waves in the X- and Y-axis directions are given to the foundry sand filled inside to fill the periphery of the fugitive model or the like without excess or deficiency. In addition, at the same time to the horizontal bottom
Vibration is generated in the vertical direction by two vibration motors provided at a short distance, and the metal frame base plate is vertically moved around the center of the metal frame base plate (as an example) to be filled in the metal frame. Waveforms in the Z-axis direction are given to the foundry sand, and the waveforms in the X- and Y-axis directions are matched to produce an excellent resonance phenomenon.
There is a characteristic to be formed. Therefore, from this type of vanishing model,
Various vanishing models up to vanishing models with poor strain resistance and deformation resistance
Aiming for reliable and precise filling of the molding sand around the mold ,
Moreover, through the use of sand pressure and angle of repose, reliable and easy filling of small gaps is achieved, resulting in the disappearance of the above.
From the plastic model to the extinction model, which is inferior in strain resistance and deformation resistance, the molding sand is precisely and precisely filled. still,
After stopping the driving of the motor of Quaternary optionally depleting model
Fill the area around the mold, etc. gently and reliably with normal molding sand.

Through the above operation and procedure, the first
When the burial of the disappearance model etc. is completed, the second burial of the disappearance model etc. is subsequently started. Of course, in the first time
There is a possibility that the burial of the disappearance model etc. will be completed. When burying the second disappearance model or the like, the above operation and procedure are repeated. This completes the second filling of the molding sand.

When the optimum packing density of the foundry sand is secured in the metal frame through the above-mentioned operations and procedures, the clamp is removed from the metal frame base plate, the metal frame is removed, and the next step is carried out. .

[0009]

An embodiment of the present invention will be described below with reference to the drawings. Sand filling apparatus A includes a base 11, and four pillar 12 erected from the base 11, the air spring 15 provided on the upper end face 12a of the pillar 12, the air spring 1
The main structure of the metal frame base plate 21 mounted on the No. 5 and four vibration motors 31 to 34 arranged on the metal frame base plate 21.
As an element .

The structure of the four vibration motors 31 to 34 will be described. X on the metal frame 41 provided on the substrate surface 21a of the metal frame base plate 21 via a clamp (not shown) (provided as necessary). The pair of vibration motors 31 and 32 for imparting a waveform in the Y-axis direction are provided in the facing direction of the side ends 21c and 21d of the horizontal bottom surface 21b of the metal frame base plate 21, and the mounting angle thereof is substantially with respect to the horizontal bottom surface 21b. It is provided with an inclination angle of 45 °. Therefore, the metal frame 41 provided on the substrate surface 21a
It is a structure that gives a tilt vibration vector of about 45 ° to
You. Reference numeral 22 in the drawing denotes a mount for the pair of vibration motors 31 and 32. Moreover, a vibration for imparting a waveform in the Z-axis direction to the metal frame 41 is provided.
The moving motors 33 and 34 are connected to the horizontal bottom surface 21b of the metal frame base plate 21.
It is provided on the horizontal plane portion 21bb of, but as shown in FIG.
A pair of positional relationship perpendicular to the facing direction H of the vibration motors 31 and 32, or 5, as shown in FIG. 6, a facing direction H, the positional relationship in the same direction, or distribution of positional relationships of confronting direction H and inclined direction There is a facility . In addition, as shown in FIGS. 7 and 8, the horizontal bottom surface 21b of the metal frame base plate 21 is provided with a stopper 23 (which is an example) on the horizontal bottom surface 21b via a rotary plate 24, which is a close distance to the horizontal bottom surface 21b.
Two vibration motors 33 and 34 are provided in B. In addition, the rotary plate 24 has the vibration motors 33 and 34 connected to the horizontal bottom surface 21.
In one example, the vibration motor 33,
The configuration is such that the mounting state of 34 and / or the mounting position of the tilt angle, the mounting state of the mounting angle, etc. can be changed, and other rotary brackets, swinging mounting plates, screwing systems (not shown), etc. included. Thus, the horizontal bottom surface 21
Two vibration motors 33 and 34 are provided at a close distance B to b,
As described above, the pair of vibration motors 31 and 32 are connected to the metal frame base plate.
21 is a horizontal bottom surface 21b side edge 21c, 21d facing direction
It is arranged to be installed at an angle of 45 °. Therefore, this closest distance B
By the two vibration motors 33 and 34 provided in the
And a pair of obliquely installed vibration motors 31 and 32
There is a characteristic that an excellent resonance phenomenon that is matched with
You.

Next, the relationship between the pillars 12 and the air springs 15 will be described. An air spring 15 is provided on the upper end surface of each pillar 12, and the metal frame base plate is provided by the respective air springs 15. The four corners of the substrate surface 21a of 21 are elastically supported, and the substrate surface 21a is held horizontally. Soshi
Then, on the upper surface of the substrate surface 21a, a metal frame 41 on which one or many disappearing models 70 are placed is installed, and the metal frame 41 and the metal frame base plate 21 are fixed by a clamp (an example. It is.) Note that FIG. 5 is installed on the upper surface of the substrate surface 21a.
The metal frame 41 has one or a large number of
2 shows a state in which the disappearing model 71 is placed.

The structure of the air unit 50 for operating the air spring 15 will be described with reference to FIG.
The air unit 50 includes a stop valve 51 and an air filter 5
2. A pressure reducing valve 53 and a manual switching valve 54. The high-pressure air sent through the high-pressure air pipe is made to have a predetermined pressure by the pressure reducing valve 53, and each air spring 15 is turned by the manual switching valve 54.
The required amount of air is injected into. Through this operation and procedure,
As shown in FIGS. 1, 2, and 5 , the substrate surface 21 a of the metal frame base plate 21 is a stopper provided on the column 12 of the base 11.
A state that has emerged from over 13.

[0013]

According to the present invention, a pair of vibration motors are installed in a metal frame base.
The horizontal bottom of the plate is installed at an angle of 45 ° opposite to the side edge, and
Two vibration motors are installed in close proximity and the horizontal bottom
The configuration is such that they are placed side by side approximately in the center of the surface. Therefore,
Waveforms from two vibration motors installed at this close distance
And the waveform of a pair of obliquely installed vibration motors
Has the property of generating an excellent resonance phenomenon, and
Resonance phenomenon has a positive effect on the movement of foundry sand.
There are signs. Especially, given to the movement of foundry sand due to the resonance phenomenon,
The positive effect is that it is thin-walled, rod-shaped, strain-resistant, and
Optimal for filling of foundry sand in a vanishing model with poor shape
You. In addition, for vanishing models with poor strain resistance and deformation resistance,
Poor oscillatory flow, i.e. unbalanced movement of foundry sand
It is possible to avoid the adverse effect that it has on the strain resistance and deformation resistance.
Features that help prevent distortion and deformation of inferior vanishing models
You. Even if it is the basis of weaker vibration and for a relatively short time,
Reliable and smooth filling of molding sand around the disappearing model
There is a feature that can be done.

The present invention also relates to the side edge of the horizontal bottom surface of the metal frame base plate.
A pair of vibration motors are installed diagonally at an angle of 45 ° in the opposite direction.
Two vibration motors are installed on the flat bottom in close proximity.
is there. Therefore, two vibration motors provided on the horizontal bottom surface
The capacity of the device can be reduced, and the size of the entire device can be reduced.
There are features that help reduce costs.

Further, the present invention provides a matched and excellent resonance phenomenon.
Is a configuration that is generated. Therefore, is it a normal vanishing model?
It has a thin shape and a rod shape, and is inferior in strain resistance and deformation resistance.
A versatile device that can accommodate a wide range of vanishing models
It is.

[Brief description of the drawings]

FIG. 1 is a front view showing an example of a state in which a fugitive model is placed on a foundry sand filling device.

FIG. 2 is a side view of FIG.

FIG. 3 is a plan view of FIG. 1;

FIG. 4 is a block diagram showing an example of a configuration of an air unit that supplies air to an air spring.

[Fig. 5] A state in which another fusible model is placed on the foundry sand filling device .
Ru front view showing an example of state.

FIG. 6 is a plan view of FIG.

FIG. 7 is a front view of a main part of another example of the foundry sand filling device.

FIG. 8 is a bottom view of FIG . 7 .

[Explanation of symbols]

11 base 12 pillar 12a upper end surface 13 stopper 15 air spring 21 metal frame base plate 21a substrate surface 21bb horizontal surface 21b horizontal bottom 21c side end 21d side end 22 mount 23 stopper 24 rotating plate 31 vibration motor 32 vibration motor 33 vibration Motor 34 Vibration motor 41 Metal frame 70 Disappearance model 71 Disappearance model A with inferior strain resistance and deformation resistance A Casting sand filling device B Closest distance H Opposite direction

Claims (1)

(57) [Claims] 1. A metal frame base plate provided on a base via a cushioning material and provided with vibration in three-dimensional X-, Y-, and Z-axis directions, and a mount on the metal frame base plate. And a metal frame in which the vanishing model is embedded, and when a vibration motor is attached to the metal frame base plate of the molding sand filling device, two vibration motors are used. 45 in the direction opposite to the side edge of the horizontal bottom surface of the frame base plate and with respect to the horizontal bottom surface of the metal frame base plate.
It is installed at an inclination angle of °, and it is installed on the horizontal bottom of the metal frame base plate.
The vibration motor of the base is installed at a close range, and the metal frame base plate
Disappearance model characterized by lining up almost in the center
Mold filling device in casting method of mold .