JPH0214831Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an apparatus for vibrating dry sand used in the production of full mold molds into a box-shaped casting flask.

(Prior art) Conventionally, in order to produce a full mold mold, a box-shaped casting flask is fixed on a vibrating table, a vanishing model is placed in the flask, dry sand is poured in, and the vibrating table is operated. The dry sand is then vibrated and filled.

When filling with dry sand like this, if the line of action of the excitation force does not match the center of gravity of the entire vibrating body including the flask, complete unidirectional vibration will not occur, especially if the flask has a high center of gravity. There was a problem that the degree of filling of dry sand inside the container differed depending on the location.

Also, if the disappearing model has a complicated shape,
There is also the problem that a sufficient filling effect of dry sand cannot be obtained with simple one-directional table vibration.

(Purpose of the invention) The present invention was made with the aim of solving the above-mentioned problems. be.

(Structure of the invention) Below, the structure of the invention will be explained in detail based on illustrated examples. Reference numerals 1 and 1 are four pillars (only two are shown) erected on the floor; A table 3 having a U-shaped cross section with flanges 2 integrally attached to the four corners of the upper end is swingably supported at the flange 2 via air springs 4, 4. A through hole 5 is bored in the center of the bottom wall of the U-shaped table 3, and the lower end of the through hole 5 is connected to a vacuum pump (not shown) via a flexible hose 6. Possibly connected.

Further, an annular seal 7 is pasted on the upper surface of the bottom wall of the table 3 having a U-shaped cross section, and a box-shaped casting flask 8 having a U-shaped cross section is placed on the upper part of the annular seal 7. A hollow chamber 9 is formed by the upper bottom surface, the annular seal body 7, and the lower bottom surface of the box-shaped flask 8.

Furthermore, even if the annular seal member 7 is attached to the lower surface of the box-shaped casting flask 8, the same effect can be obtained.

A pair of vibration motors 10, 10 for vertical vibration are attached to the lower surface of the table 3 in parallel with an appropriate distance therebetween. Further, on the vertical outer surface of the table 3, vibration motors 11, 11, 12 for horizontal vibration are installed at the same height as the center of gravity of the table 3, the box-shaped casting flask 8, dry sand, etc. ，
12 is attached, and the vibration motors 11, 11, 12, 12 for horizontal direction excitation are paired as a pair, and the pair of vibration motors 11,
The vibration direction of 11 is the same as that of the other pair of vibration motors 12, 12.
The horizontal direction is shifted by 90 degrees from the direction of vibration.

Further, cylinders 13 oriented toward the center of the table 3 are installed horizontally at the four corners of the upper end of the table 3.
At the tip of the piston rod, there is an attachment 14 shaped to match the shape of the four corners of the box-shaped flask 8.
is fixed. Note that 15 in the figure is dry sand in which the missing model (not shown) is buried.

(Operation of the invention) To explain the operation of the device configured as described above, a box-shaped casting flask 8 is placed in the recess of the U-shaped table 3 with an annular seal 7 interposed therebetween. After setting a disappearing model (not shown) inside, a predetermined amount of dry sand 15 weighed in advance is poured into a box-shaped casting flask 8.
put it in.

Next, the cylinder 13 is operated to bring the attachment 14 into contact with the four corners of the box-shaped flask 8, and the box-shaped flask 8
is clamped from the side, and the flexible hose 6 is connected to a vacuum pump (not shown) to reduce the pressure in the hollow chamber 9, and the lower bottom surface of the box-shaped casting flask 8 and the bottom upper surface of the table 3 are fixed by vacuum suction.

In this state, when the pair of vibration motors 10, 10 are rotated in opposite directions, the box-shaped casting flask 8 containing the dry sand 15
The table 3 vibrates in the vertical direction, and when the vibration motors 11, 11 or the vibration motors 12, 12 are similarly rotated, the table 3 vibrates in the horizontal direction. Furthermore, when the vibration motors 10, 10 and the vibration motors 11, 11 or the vibration motors 12, 12 are rotated at the same time, the box-shaped casting flask 8 and the table 3 containing the dry sand 15 are moved in the combined direction of the vertical and horizontal directions. is vibrated.

In this way, it is possible to generate vibrations in the vertical direction, two types of horizontal directions, and even two types of vibrations by combining these directions, depending on the shape of the vanishing model to be set. to appropriately control the direction of vibration generation.

In addition, the vibrations generated are particularly important when the vibration motors 11, 11, 12, and 12 for horizontal vibration are installed at the same height as the center of gravity of the entire structure including the table 3, casting flask 8, and dry sand 15. Since it is provided in the dry sand 15, a complete horizontal vibration is applied to the dry sand 15 instead of a pendulum movement.

Furthermore, since the box-shaped flask 8 is fixed to the table 3 by both clamping from four sides by the cylinder 13 and vacuum suction on the bottom surface, vibrations of the table 3 can be faithfully transmitted to the flask. become.

(Effect of the invention) This invention has a U-shaped table with a cross section of 6 as described above.
The installation position of the vibration motor for horizontal vibration is set at the same height as the center of gravity of the entire structure including the table, flask, dry sand, etc. The box-shaped casting flask is fixed to the table 3 using a combination of clamping from four sides using cylinders and vacuum suction on the bottom surface. Since the table and box-shaped casting flask are integrated into one body, the optimum vibration is generated in the table for filling with dry sand, and the vibration force generated in the table is faithfully transmitted to the casting flask. This provides an excellent effect of filling the dry sand well.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, and Fig. 1 is a plan view, Fig. 2 is a view taken along the line A-A in Fig. 1,
FIG. 3 is a view taken along the line B--B in FIG. 1. 3... U-shaped cross section table, 4... Air spring,
5... Through hole, 8... Box-shaped flask, 10... Vibration motor for vertical vibration, 11, 12... Vibration motor for horizontal vibration, 13... Cylinder, 15... Dry sand.

Claims (1)

[Scope of utility model registration request] A table 3 having a U-shaped cross section is swingably supported at its upper end via a plurality of air springs 4, 4,
A through hole 5 is bored through the bottom wall of the table 3 vertically, the lower end of the through hole 5 is connected to a flexible hose 6 leading to a vacuum pump, and the upper end 4 of the table 3 is U-shaped in cross section. Cylinder 13 with attachment 14 attached to the tip of its piston rod in the corner
A pair of vibration motors 10, 10 for vertical vibration are attached to the bottom surface of the table 3, and a motor for horizontal vibration is installed on each vertical outer surface of the table 3. Installation, the installation height of the horizontal vibration motor is the same as the height of the center of gravity of the entire table 3, the box-shaped casting flask 8 placed on the table 3, the dry sand 15, etc. to be charged. The vibration motors for horizontal direction excitation are attached to opposing surfaces as a pair, and the vibration generation direction of the pair of vibration motors 11, 11 is the vibration direction of the other pair of vibration motors 12, 12. A dry sand filling device that is installed horizontally at a 90 degree angle to the dry sand filling device.