JPH07112637B2 - Method for molding compression molded body and molding apparatus therefor - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention contains a raw material to be molded, such as a powdery material or granular material, inside a molding die, and presses the molding die from above and below to form the raw material to be molded into a predetermined shape. TECHNICAL FIELD The present invention relates to a method for molding a compression-molded body and a molding apparatus therefor.

[0002]

2. Description of the Related Art Conventionally, a shelf plate or a furnace material used in a heating furnace is manufactured by putting a ceramic material to be molded made of powder or granules into a molding die and pressing it.
It is molded as a compression molded body having a predetermined shape. Thereafter, the compression molded body is fired.

As a compression molding method, generally, there is a method in which a material to be molded is contained in a molding die composed of a lower die and an upper die, and the molding die is vertically compressed by a pressing machine.

However, this method has a problem in that the degree of compression with respect to the raw material to be molded is not so high that the material is prone to oxidative deterioration and is easily deformed by a load under high temperature conditions. As a countermeasure, there is one in which a vibration generator is attached to a press machine and a high-frequency micro-vibration is given to a molding die.

[0005]

By the way, in the case where the molding die is vibrated, it is not clear how much frequency vibration is effective for molding. Empirically, an empirical experience is to appropriately find and use a vibration generator having a good molding finish. Furthermore, as the vibration component, there is acceleration in addition to the frequency, and this acceleration component is not taken into consideration. As the vibration generator, a vibrator or an eurrus motor is often used.

However, when the thickness of the molded body is uniformly thin, the degree of compression can be increased to some extent as a whole, but in reality, only the surface portion is densified, and the degree of compression inside is increased. It often causes a problem that the density is not so high and the density is low. The reason is that, when the above vibration generator is used, if the vibration frequency is high, the vibration propagates only on the surface of the raw material to be molded, and as a result, only the surface portion has a high density and the inside is not highly densified. .

Even if the frequency is low, it is considered that even if the acceleration given to the material to be molded is low, even if it takes a long time, the inside cannot be densified for the same reason. In particular, when the thickness of the molded body is large, the variation in the degree of compression is large, and the degree of improvement in deformation and distortion is low. Also, FIG.
As shown in Fig. 3, when the surface shape of the molded body is formed into a corrugated shape, the degree of compression of the surface portion does not increase so much, the surface portion becomes rough, and the occurrence rate of oxidative deterioration is high. However, there is a problem in that this is not sure about uniform molding of a high-density molded body.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a compression-molded body which is capable of obtaining a molded body which is uniform in overall shape and has a high density when the molding material is compression-molded. A molding method and a molding apparatus therefor are provided.

[0009]

The method for molding a compression-molded article of the present invention comprises the steps of accommodating a material to be molded such as a powdery material or a granular material inside a molding die and pressing the molding die from above and below. Regarding compression molding of the raw material to be molded into a predetermined shape,
A frequency of 0.5 to 100 [Hz] and an acceleration of 5 are provided on one or both of the upper and lower parts of the mold.
It is characterized in that a vibration of up to 30,000 [G] is applied (the invention of claim 1).

A molding apparatus for a compression-molded article according to the present invention comprises a mold for containing a raw material to be molded such as a powder raw material or a granular raw material, and a pair of pressing members for pressing the molding die from above and below. One or both of the pair of pressing members has a frequency of 0.5 to 100 [Hz] and an acceleration of 5 to 3
The present invention is characterized in that it is provided with a vibration generator that gives a vibration of 0000 [G] (the invention of claim 2).

The method of molding a compression-molded article according to the present invention is such that a raw material to be molded such as a powdery material or a granular material is housed inside a molding die and the molding die is pressed from above and below to form the raw material to be molded into a predetermined shape. In the case of compression molding into a molded body of (1), a frequency of 0.5
Acceleration is 2000 to 30000 [G] at up to 25 [Hz]
The present invention is characterized in that it is adapted to give the vibration of (3).

The compression molding body molding apparatus of the present invention comprises a molding die for containing a molding raw material such as a powder raw material or a granular raw material, and a pair of pressing members for pressing the molding die from above and below. A vibration generating device that is attached to one or both of a pair of pressing members and that generates a vibration having a frequency of 0.5 to 25 [Hz] and an acceleration of 2000 to 30000 [G]. It has (the invention of claim 4).

In the method for molding a compression-molded article of the present invention, a raw material to be molded such as a powdery material or a granular material is contained in a molding die, and the molding die is pressed from above and below to form the raw material to be molded into a predetermined shape. For compression molding into a molded body of No. 1, the frequency is 25 to 100 [Hz] in one of the upper and lower parts of the mold.
And acceleration of 5 to 1500 [G] is applied, and the other frequency is 0.5 to 25 [Hz] and acceleration of 2000 to
It is characterized in that a vibration of 30,000 [G] is applied (the invention of claim 5).

The compression molding apparatus of the present invention comprises a molding die for containing a raw material to be molded such as a powder raw material or a granular raw material, and a pair of pressing members provided on the frame for vertically pressing the molding die. A member and a first member which is attached to one of the pair of pressing members and which generates a vibration having a frequency of 25 to 100 [Hz] and an acceleration of 5 to 1500 [G]
And a second vibration generator which is attached to the other of the pair of pressing members and which generates a vibration having a frequency of 0.5 to 25 [Hz] and an acceleration of 2000 to 30000 [G].
And a vibration generator of the present invention (the invention of claim 6).

In this case, the pair of pressing members may be removably attached to the upper portion and the lower portion of the frame through attaching means having the same structure, respectively (claim 7).

The first vibration generator is a cylinder, a piston which is provided inside the cylinder and receives a spring force in a predetermined direction and operates by the spring force and air pressure, and an actuator which is struck by the piston. It is also possible to adopt a configuration provided with (invention of claim 8).

Further, the second vibration generator is driven by a cylinder, a piston provided inside the cylinder and operated by the gas pressure and the hydraulic pressure to receive the pressure of the compressed gas in a predetermined direction. It may be configured to include an actuator (claim 9).

[0018]

According to the first and second aspects of the present invention, the frequency is 0.5 to 100 [Hz] and the acceleration is 5 to 30000 in either or both of the upper part and the lower part of the molding die.
Since the vibration of [G] is given, the raw material to be molded is actively moved in the entire region of the molding die, and as a result, the air contained in the raw material to be molded is released better and the raw material to be molded has a high density. Will be compressed into. Therefore, it is possible to surely obtain a molded body which is uniform in its entirety and compressed at a high density.

According to the third and fourth aspects of the present invention, the frequency is 0.5 to 25 [Hz] and the acceleration is 2000 to 30000 in one or both of the upper part and the lower part of the molding die.
Since the vibration of [G] is applied, the raw material to be molded is more actively moved in the entire area of the molding die.
In addition to being able to reliably obtain a compact that is uniform in its entirety and compressed at a high density, it is possible to favorably mold a compact having a considerably large thickness. According to the inventions of claims 5 and 6, the frequency is set to one of the upper part and the lower part of the mold.
5 to 100 [Hz] and acceleration of 5 to 1500 [G]
Vibration of 0.5 to 25 [H
Since a vibration having an acceleration of 2000 to 30000 [G] is given by z], a larger acceleration is generated by the synergistic effect of the different vibration modes, and in this case as well, a thick molded body can be molded.

In this case, according to the invention of claim 7, the pair of pressing members are removably attached to the upper portion and the lower portion of the frame through attaching means having the same structure, respectively. The pressing member having the vibration generator attached thereto and the pressing member having the second vibration generator attached thereto can be interchanged vertically, that is, the first vibration generator and the second vibration generator can be interchanged vertically. it can.

Further, in the invention of claim 8, the first vibration generator comprises a cylinder, and a piston which is provided inside the cylinder and which receives a spring force in a predetermined direction and operates by the spring force and air pressure. By having a structure provided with an actuator that is hit by this piston, the acceleration is 5 to 1500 [Hz] and the acceleration is 5 to 1500.
It is possible to satisfactorily generate the vibration of [G], and this can be achieved with a simple structure for generating the vibration.

Furthermore, in the invention of claim 9,
The second vibration generator includes a cylinder, a piston provided inside the cylinder, which receives pressure from a compressed gas in a predetermined direction and operates by the gas pressure and hydraulic pressure, and an actuator which is struck by the piston. With the configuration, it is possible to satisfactorily generate a vibration of 0.5 to 25 [Hz] and an acceleration of 2000 to 30000 [G], and to achieve the vibration, this is achieved by simplifying the structure. it can.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 shows a molding apparatus of the present invention. A fixed base 4 is fixed to the lower portion of the frame 1 via a bracket 2, an intermediate support base 21 a, and a support column 3. An anti-vibration rubber 5 is interposed between the support column 3 and the intermediate support base 21a. A bolt insertion hole is formed in the bracket 2 in a predetermined arrangement as an attachment means for attaching the intermediate support base 21a, and a bolt insertion hole is also formed in the intermediate base 21a in the same arrangement as the bolt insertion hole. The intermediate base 2 by tightening the nuts of the bolts 21c passed through the bolt insertion holes.
1a is detachably attached.

A holder 7 is suspended from the fixed base 4 via four air cylinders 6 (only two of which are shown). A second vibration generator 8 is attached to the holder 7 so as to face upward. Has been. A pressing member 9 is attached to the upper part of the fixed base 4 via a vibration-proof rubber 10. An actuator 13 (described later) of the second vibration generator 8 is connected to a lower portion of the pressing member 9.

The second vibration generator 8 is constructed as shown in FIG. That is, the second vibration generator 8 is configured to include the cylinder 11, the piston 12, the actuator 13, the valve 14, and the plunger 15. A piston 12 is provided inside the cylinder 11, and when the piston 12 moves downward, its lower end surface receives upward pressure by the compressed nitrogen gas in the gas chamber 11e. In addition to the piston working chamber 11a and the valve chamber 11b, a predetermined oil passage and an oil chamber are formed in the cylinder 11.

Then, a high pressure (for example, 1
When 20 [kilogram / square centimeter] of oil is supplied, the oil is discharged from the oil discharge port 11d through the internal oil passage, but when the piston 12 is moved downward, the oil passage is formed accordingly. The pattern changes, and further valve 1
By the movement of 4 or the like, hydraulic pressure acts on the piston 12 in addition to the gas pressure of the compressed nitrogen gas, and the hydraulic pressure moves upward at a stroke.
This strikes the actuator 13, which causes the pressing member 9 to vibrate. In the second vibration generator 8, by adjusting the hydraulic pressure (see each table described later) and the like, the frequency is in a certain frequency range of 0.5 to 25 [Hz] and the acceleration is 2000 to 30000 [. G] that generate vibration of acceleration in a certain acceleration range,
The frequency is 7 to 8 Hz in this embodiment. [G] is represented by the following formula.

[0028]

[Equation 1] On the other hand, on the upper part of the frame 1 shown in FIG.
a and 1a are fixed respectively, and this horizontal frame 1
There are four guide bearings 16a in total (only two are shown).
Is fixed to the guide bearing 16.
7 is inserted vertically. A movable base 18 is connected to the upper end of each guide shaft 17, and a frame-shaped member 19 is connected to each lower end of the guide shaft 17. An intermediate support base 21b is suspended from the movable base 18 via a bracket 20, and the intermediate support base 21b is suspended.
A lower support base 23 is suspended from the suspension base 22 via a suspension shaft 22. The bracket 20 has an intermediate support base 21b.
A bolt insertion hole is formed in a predetermined arrangement as an attachment means for attaching the bolt insertion hole, and the intermediate base 21b is also formed with a bolt insertion hole in the same arrangement as the bolt insertion hole.
The intermediate base 21b is detachably attached by tightening the nuts of the bolts 21d passed through the bolt insertion holes.

Further, a pressing member 25 is attached to the lower support base 23 via a rubber cushion 24.
Four first vibration generators 26 are attached and fixed to the upper surface of the pressing member 25 in the arrangement shown in FIG.

Air cylinders 27, 27 are fixed to the lateral frames 1a, 1a, and rods 27a of each cylinder 27 are connected to the frame-shaped member 19, so that each air cylinder 27 is connected. Is the rod 27
When a is moved downward, the frame-shaped member 19 and the guide shaft 1
7, movable base 18, bracket 20, intermediate support base 21b, suspension shaft 22, lower support base 23, pressing member 2
The fifth vibration generator 26 and the first vibration generator 26 are integrally moved downward.

As shown in FIG. 4, the first vibration generator 26 is provided with a piston 29 in a cylinder 28, a return spring 30, and a top liner 31 and a bottom liner 31 as an actuator below the cylinder 28. 32 is attached. And
The bottom liner 32 is attached and fixed to the pressing member 25.

Therefore, in the first vibration generator 26, compressed air (for example, 9.9) is supplied from the air inlet 28a.
[Kilogram / square centimeter] or less), the internal piston 29 is moved upward against the spring force of the return spring 30, and the internal air passage to the uppermost position is switched, whereby the piston is moved. 29 is moved downward by spring force and air pressure. By this movement, the top liner 31 and the bottom liner 32 as an actuator are struck, so that the pressing member 25 is slightly vibrated. In the first vibration generator 26, compressed air supply control and air pressure (see each table described later).
The vibration of the acceleration in the frequency range of 25 to 100 [Hz] and the acceleration in the acceleration range of 5 to 1500 [G] depending on the adjustment of the lighting) or the number of the installed devices 26. The frequency is about 50 Hz in this embodiment.

Further , in FIG. 1, the molding die 33 is a lower die.
34, a frame mold 35, and an upper mold 36,
Inside, silicon carbide, alumina or zirconia
Raw material for molding ceramic granules or powders such as
The fee 37 is accommodated. In addition, this mold
The lower mold 34 of 33 is corrugated as shown in FIG.
The molding die 33 is arranged on the pressing member 9.

Here, the one pressing member 9 and the second
The intermediate support base 21a to which the vibration generator 8 is attached is detachably provided to the bracket 2 existing under the frame 1 via an attaching means (bolt tightening means), and the other pressing member 25 and The intermediate support base 21b to which the vibration generator 26 of No. 1 is attached is also detachably attached to the bracket 20 existing on the upper part of the frame 1 through the attaching means, and the upper and lower attaching means have the same structure. Therefore, the one pressing member 9 and the other pressing member 25 are configured to be replaceable via the mounting means, and therefore, the first
The vibration generator 26 and the second vibration generator 8 can be interchanged vertically.

Now, the operation of the above configuration will be described.

From the state shown by the solid line in FIG. 1, the air cylinder 27 is driven to lower the frame-shaped member 19 and thus the pressing member 25, and the upper mold 36 is pressed from above as shown by the chain double-dashed line. As a result, the molding die 33 is pressed by the pressing member 25 and the pressing member 9 which are a pair of pressing members. And after this,
The lower air cylinders 6 are driven to pull up the pressing member 9 via the holder 7 and then the second vibration generator 8, and thus the molding die 33 is held in a so-called mold clamped state.

Then, the second vibration generator 8 and the first vibration generator
The vibration generator 26 of FIG.

As a result, the second vibration generator 8 operates as described above to apply a strong vibration to the pressing member 9, and the first vibration generator 26 also operates as described above. The operation causes the pressing member 25 to be slightly vibrated.

Here, when only each first vibration generator 26 is driven, a minute vibration of 50 Hz is individually generated, and as shown in FIG. 6, a steep vibration waveform group is generated within 0.1 second. It occurs about 5 times.

When only the second vibration generator 8 is driven, the second vibration generator 8 produces a sharp vibration as shown in FIG.
The dynamic waveform occurs at a frequency of 7-8 Hz.

However, when both the first vibration generating device 26 and the second vibration generating device 8 are driven as in this embodiment, a slight vibration is applied to the upper portion of the molding die 33 and a strong vibration is applied to the lower portion.
Vibration gives et Re Rukoto of order, due to the synergistic of these vibration modes, occurs in a cycle where there is a very high acceleration in the vibration system of these molds 33. The vibration pattern of the molding die 33 at this time is shown in FIG. As can be seen from FIG. 8, an acceleration of approximately 20,000 G acts on the molding die 33. It should be noted that this acceleration measurement point is indicated by a symbol P in FIG.

As a result, since the large acceleration acts on the molding die 33 at a certain cycle, the raw material 37 to be molded is actively moved in the entire area of the molding die 33, and as a result, the raw material 37 to be molded is moved. The included air escapes better,
Moreover, since the pressing force itself increases due to the above-mentioned strong vibration , the material 37 to be molded comes to be compressed at a high density. Therefore, a molded body which is uniformly uniform and compressed at a high density can be obtained.

The following phenomenon can be considered for achieving this high density. That is, since the raw material 37 to be molded contained in the molding die 33 is in the form of powder or granules, each granule has a so-called bridge structure, and air is present between the granules. Exists. However, if the raw material 37 to be molded in such a situation is temporarily
When a certain constant pressure is applied and pressed, the bridge structure is crushed by a certain pressure, but if the pressure does not fluctuate there, the degree of breakage of the bridge structure is small.

On the contrary, if a large pressure (acceleration) acts during the transition period when the bridge structure is destroyed, the bridge structure is largely destroyed. That is, as described above, in this embodiment,
Since a large acceleration acts on the molding die 33 in a certain cycle, the large acceleration is given during the break transition period of the bridge structure, so that the movement of the material to be molded becomes very active and the air escapes. As a result, a high density molded body can be obtained. Therefore, even if the thickness of the molded body is large, the variation in the degree of compression can be made extremely small, which can greatly contribute to the prevention of deformation and distortion under high temperature conditions.
Further, even when the surface shape of the molded body has a complicated shape such as a corrugated shape, a high density molded body can be obtained, and the occurrence of oxidative deterioration can be prevented.

Although the four first vibration generators 26 are provided in the above embodiment, the number and arrangement of the first vibration generators 26 are not limited to this, and a diagram showing a second embodiment of the present invention is shown. You may change like 9. Further, the positional relationship between the first vibration generator 26 and the second vibration generator 8 may be reversed.

Table 1, Table 2, Table 3 and Table 4 show the data that the applicant experimented with.

[0047]

[Table 1]

[0048]

[Table 2]

[0049]

[Table 3]

[0050]

[Table 4] Tables 1 and 2 show that the material to be molded was compression-molded by applying various modes of vibration to either the upper part or the lower part of the mold containing the material to be molded, and the molded product was fired. , Shows various measurement results. Also, Table 3
Shows various measurement results in a state where the raw material to be molded is similarly compression-molded by applying vibrations of various modes to both the upper part and the lower part of the molding die, and the molded body is fired.

Specifically, the molding material used in this experiment contained 97% by weight of SiC particles and 2% of bentonite.
A kneaded material is obtained by adding 3 to 5% by weight of water to a mixture of 1% by weight and 1% by weight of a cellulosic binder and then kneading the mixture with a kneader. The particle size distribution of the SiC particles is about 40% by weight for particles of 500 to 3360 microns,
About 20% by weight of 100-500 micron particles, 100
About 40% by weight of micron particles or less is specified. Such a kneaded material was put into a flat mold having a width of 400 mm and a length of 350 mm, compression-molded to an arbitrary thickness, and the molded body was fired at 1400 ° C.

The way to read this table is as follows: As the vibration generators, the first vibration generators A to F having the same structure as the first vibration generator used in the first embodiment (the specifications are slightly different from each other). 2) and second vibration generators P to S having the same configuration as the second vibration generator used in the first embodiment (specifications are slightly different from each other). The first vibration generator is abbreviated as “first” in the table, and the second vibration generator is abbreviated as “second” in the table.

In the table, the pressure (kilogram / square centimeter) indicates the working air pressure in the first vibration generator, the working oil pressure in the second vibration generator, and the frequency (Hz) and acceleration (G) indicate each vibration generation. The mode of vibration generated in the device is shown. The acceleration is measured at a point T on the pressing member 25 in FIG. 3, an FFT analyzer CF-350 manufactured by Oda Sokki Co., Ltd. is used for analysis, and a TEAC accelerometer 508S manufactured by TEAC is used as a sensor.
The same 507LF, 507 and ENDEVCO accelerometers 7270A-200K were used.

The bulk density (gram / cubic centimeter) shown in the table is 400 mm wide as shown in FIG.
The bulk density is measured for each of the test pieces h obtained by further dividing the fired product H having a length of 350 mm and an appropriate thickness into 16 and the average value is shown.

The size difference (gram / cubic centimeter) is obtained by subtracting the minimum value from the maximum value of the bulk density of each test piece h.

Further, the possible molding thickness (millimeter) is the maximum thickness that can be molded within a molding time of 60 seconds,
"-" In the column indicates that a wall thickness molded body having a minimum wall thickness of 5 mm was not obtained. The molding time (seconds) in the table is the maximum time required to obtain a molded product having the maximum wall thickness without causing surface roughness under the vibration conditions.

The evaluation of surface roughness in the table is shown by "x" when there is a problem in use and "○" when there is no problem. The evaluation of the judgment is good when the bulk density is 2.65 or more, the size difference is 0.05 or less, the molding time is 60 seconds or less, and the surface roughness is evaluated as "○". ". Other than this, it is defective and is shown by "x".

As can be understood by looking at the columns corresponding to the evaluation "x" of each judgment in Table 1, Table 2 and Table 3, when the frequency exceeds 100 [Hz] regardless of the acceleration, it becomes 0 again. When the frequency is lower than 2 [Hz], the evaluation of the judgment is bad (“×”), and the acceleration is 4 regardless of the frequency.
If it is less than [G] or exceeds 30,000 [G], the evaluation judgment is bad (“x”). In other words, the frequency exceeds 0.2 [Hz] (the frequency is 0.5
If the vibration of the mode in the range of 100 [Hz] or less and the acceleration of 5 [G] or more and 30000 [G] or less is applied to one of the upper and lower parts of the molding die, Also in this case, the raw material to be molded is actively moved in the entire area of the molding die. As a result, the air contained in the raw material to be molded is better released, and the raw material to be molded is compressed to a high density. Become. Therefore, it is possible to surely obtain a molded body which is uniform in its entirety and compressed at a high density. So,
The desired purpose can be achieved.

Particularly, one of the upper part and the lower part of the molding die has a frequency of 0.5 to 25 [Hz] and an acceleration of 200.
When the vibration of 0 to 30000 [G] is applied,
As can be understood from each table, the possible molding thickness can be considerably increased, and the difference in size can be suppressed to a considerably low level, and a further excellent effect can be obtained. Further, when the vibration of the mode is applied to both the upper part and the lower part of the molding die, a more excellent effect is exhibited.

As can be seen from Table 3, one of the upper and lower parts of the mold has a frequency of 25 to 100 [H].
z] and acceleration of 5 to 1500 [G] is applied,
On the other hand, the frequency is 0.5 to 25 [Hz] and the acceleration is 200.
When a vibration of 0 to 30000 [G] is applied, the frequency is 0.5 to 25 in only one of the upper part and the lower part of the mold.
As compared with the case where the acceleration of 2000 Hz to 30000 [G] is applied at [Hz], the possible molding thickness can be considerably increased, and the difference in size can be suppressed to a considerably low level.

In addition, the present invention is not limited to the above-mentioned embodiments, but various modifications can be made without departing from the scope of the invention.

[0062]

According to the first and second aspects of the present invention, it is possible to surely obtain a molded body which is uniform overall and extremely high in density when compression molding a raw material to be molded.

According to the third and fourth aspects of the present invention, in addition to being able to reliably obtain a compact which is uniformly and highly compressed as a whole, a compact having a considerably large thickness can be favorably molded. .

According to the fifth and sixth aspects of the invention, the frequency is 0.5 to 25 in only one of the upper part and the lower part of the mold.
It is possible to mold a molded body having a higher density and a thicker thickness as compared with the case where the acceleration of 2000 to 30000 [G] is applied at [Hz].

According to the invention of claim 7, in addition to the above effect being obtained, the first vibration generating device and the second vibration generating device can be switched up and down.

According to the invention of claim 8, the frequency is 25 to
It is possible to satisfactorily generate a vibration of 100 [Hz] and an acceleration of 5 to 1500 [G], and this vibration can be achieved with a simple structure.

According to the invention of claim 9, the frequency is 0.5.
~ 25 [Hz] and acceleration of 2000 to 30000
It is possible to satisfactorily generate the vibration of [G], and this can be achieved with a simple structure for generating the vibration.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of a molding apparatus showing a first embodiment of the present invention.

FIG. 2 is a vertical sectional side view of a second vibration generator.

FIG. 3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a side view of the first vibration generator.

FIG. 5 is a vertical sectional side view of the molding die.

FIG. 6 is a diagram showing a slight vibration mode.

FIG. 7 is a diagram showing a stronger vibration mode.

FIG. 8 is a view showing a vibration mode that acts on a molding die.

FIG. 9 is a diagram showing a second embodiment of the present invention.

FIG. 10 is a perspective view of the molded fired product used in the experiment.

[Explanation of symbols]

6 is an air cylinder, 8 is a second vibration generator, 9 is a pressing member, 11 is a cylinder, 12 is a piston, 13 is an actuator, 16 is a guide bearing, 17 is a guide shaft, 25 is a pressing member, and 26 is a first. , 28 is a cylinder, 29 is a piston, 30 is a return spring, 31 is a top liner (actuator), 32 is a bottom liner (actuator), 33 is a mold, and 37 is a material to be molded.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Takashi Osato 5-74 Sakuragaoka, Kani City, Gifu Prefecture (56) References Special Table Sho 59-501352 (JP, A) Special Table Sho 62-502973 (JP, A)

Claims (9)

[Claims] 1. A method for accommodating a raw material to be molded such as a powdery material or a granular material inside a molding die and pressing the molding die from above and below to compression-mold the raw material to be molded into a molded article having a predetermined shape, A compression molded article, characterized in that a vibration having a frequency of 0.5 to 100 [Hz] and an acceleration of 5 to 30000 [G] is applied to one or both of the upper part and the lower part of the molding die. Molding method. 2. A molding die containing a raw material to be molded such as powder raw material or granular raw material, a pair of pressing members for pressing the molding die from above and below, and one of the pair of pressing members. Frequency is 0.5 to 100 [Hz] on both sides
And a vibration generator that gives a vibration with an acceleration of 5 to 30000 [G]. 3. A method for accommodating a raw material to be molded such as a powdery material or a granular material inside a molding die, and pressing the molding die from above and below to compression-mold the raw material to be molded into a molded article having a predetermined shape, A frequency of 0.5 to 25 [Hz] and an acceleration of 2000 are applied to one or both of the upper part and the lower part of the mold.
A method for molding a compression molded article, characterized in that a vibration of up to 30,000 [G] is applied. 4. A molding die containing a raw material to be molded such as powder raw material or granular raw material, a pair of pressing members for pressing the molding die from above and below, and one of the pair of pressing members. It is attached to both sides and the frequency is 0.5-2
5 [Hz] and acceleration is 2000 to 30000 [G]
And a vibration generator that generates the vibration of the compression molded body. 5. A method for accommodating a raw material to be molded such as a powdery material or a granular material inside a molding die and pressing the molding die from above and below to compression-mold the raw material to be molded into a molded article having a predetermined shape, One of the upper and lower parts of the mold has a frequency of 2
5 to 100 [Hz] and acceleration of 5 to 1500 [G]
And a vibration having a frequency of 0.5 to 25 [Hz] and an acceleration of 2000 to 30,000 [G] are applied to the other. 6. A molding die for containing a raw material to be molded such as a powder raw material or a granular raw material, a pair of pressing members provided on a frame for vertically pressing the molding die, and a pair of the pressing members. Attached to one of them and has a frequency of 2
5 to 100 [Hz] and acceleration of 5 to 1500 [G]
And a frequency of 0.5 to 2 attached to the other one of the pair of pressing members.
5 [Hz] and acceleration is 2000 to 30000 [G]
And a second vibration generating device for generating the vibration of the compression molding body. 7. The apparatus for molding a compression molded article according to claim 6, wherein the pair of pressing members are removably attached to the upper and lower portions of the frame through attachment means having the same structure. . 8. A first vibration generator includes a cylinder, a piston provided inside the cylinder, which receives a spring force in a predetermined direction and operates by the spring force and air pressure, and an actuator struck by the piston. 7. The molding apparatus for a compression molded body according to claim 6, wherein the molding apparatus is provided with. 9. The second vibration generating device is struck by a cylinder, a piston provided inside the cylinder, which receives a pressure of a compressed gas in a predetermined direction and operates by the gas pressure and hydraulic pressure, and is struck by the piston. The molding apparatus for a compression molded body according to claim 6, wherein the molding apparatus comprises an actuator.