JP2011251336A - Rubber mold for cold isostatic pressing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To save useless cost such as waste of forming material cost, processing cost, processing time, and manufacturing cost of rubber mold, in the rubber mold which is held in a forming vessel of a cold isostatic pressing device and pressed on its whole outer surface.SOLUTION: The rubber mold 1 for the cold isostatic press device includes a mold body 20 having a cavity 25 with an opening upward to enable supply of forming material, a lid 21 to be placed on the mold body 20 so that it can close the opening of the cavity 25. A cavity 27 for forming the forming material into the designated shape is formed by the inner face of the cavity 25 composed in the mold body 20 and the closed face of the opening of the cavity 25 of the lid 21. The cavity 27 comprises a bottom pressing section 30 that is the cavity hemispheric downward, a top pressing section 31 that is the cavity hemispheric upward and opposing to the bottom pressing section 30 above the bottom pressing section 30, and a middle extra length section 32 that connects the bottom pressing section 30 and the top pressing section 31 through a straight cylindrical face.

Description

  INDUSTRIAL APPLICABILITY The present invention relates to a cold isostatic pressurizing apparatus that can be suitably used when a molded body having a spherical shape or the like is formed from a molding material such as ceramic powder using a cold isostatic pressurizing apparatus. It is related with the rubber mold for.

The cold isostatic press (CIP device) is equipped with a vertical cylindrical molding container, and a rubber mold filled with a molding material such as ceramic powder is loaded into this molding container. Then, by pressing the entire outer surface of the rubber mold, it is an apparatus for producing a molded body compressed along the cavity shape (molding chamber shape) in the rubber mold.
In this CIP apparatus, a method for forming a spherical molded body by forming a cavity (molding chamber) in a rubber mold in a spherical shape is known (see, for example, Patent Document 1).

  The rubber mold used in Patent Document 1 has a mold main body provided with a concave portion of an upper opening that can supply a molding material, and a lid that closes the opening of the concave portion by being placed on the mold main body. It has become. A cavity for molding the molding material into a predetermined shape is formed by the inner surface of the recess formed in the mold body and the opening closing surface of the recess by the lid. The recess formed in the mold body communicates with the outside through a small-diameter circular communication hole that passes upward, while the lid is provided with a cylindrical fitting projection that projects downward. When the lid is placed on the upper part of the mold body, the fitting projection is fitted into the communication hole of the recess.

  The lower end of the fitting protrusion provided on the lid is formed as a spherical surface that is recessed upward, and has the same curvature as the hollow inner surface of the recess provided on the mold body (which is spherical as described above). Has a radius. Therefore, the cavity formed in the rubber mold in a state where the lid is placed on the mold main body becomes a molding space closed in a spherical shape.

Japanese Utility Model Publication No. 5-34871

  In the rubber mold disclosed in Patent Document 1, even if the molding material is filled in the concave portion of the mold body and the fitting projection of the lid is fitted and sealed in the communication hole of the concave portion, the lower end portion of the fitting projection ( It is impossible to fill the molding material into the spherical portion recessed upward). That is, in the cavity that is a closed spherical space, a gap that is not filled with the molding material is generated at the lower end of the fitting protrusion.

  Therefore, even when such a rubber mold is loaded into a molding container of a CIP device to produce a molded body, there is a problem that only a distorted spherical shape in which the upper hemisphere portion is flattened can be obtained. In this case, in order to obtain a spherical molded body having a high sphericity, a considerable amount of processing is required in the polishing processing after molding, and as a result, only a product smaller than the spherical size to be obtained can be obtained. It will be.

In other words, the cavity size of the rubber mold must be considerably larger than the spherical size to be finally obtained, so that a large amount of processing allowance is allowed, and therefore the cost of the molding material is wasted. Was supposed to occur. Naturally, the processing cost and processing time related to the polishing processing after molding and the like, and the manufacturing cost of the rubber mold included waste.
The present invention has been made in view of the above circumstances, and it is possible to eliminate the waste in terms of processing cost, processing time, rubber mold manufacturing cost, etc., including costly waste of molding materials. An object is to provide a rubber mold for an isotropic pressure press.

In order to achieve the above object, the present invention has taken the following measures.
That is, the rubber mold for a cold isostatic pressurizing apparatus according to the present invention is a molding rubber mold that is housed in a molding container of a cold isostatic pressurizing apparatus and pressurizes the entire outer surface. The molding rubber mold has a mold body provided with a recess in an upper opening that enables supply of a molding material, and a lid that closes the opening of the recess by being placed on the mold body. A cavity for molding a molding material is formed by the inner surface of the concave portion formed in the mold body and the opening closing surface of the concave portion by the lid, and the cavity includes a lower pressurizing portion that becomes a hemispherical concave portion downward. The upper pressurizing part which is a hemispherical concave portion upwardly opposite to the lower pressurizing part above the lower pressurizing part, and the lower pressurizing part and the upper pressurizing part on a straight cylindrical surface It is comprised by the center surplus length part made to communicate, It is characterized by the above-mentioned.

  Here, the “hemispherical concave portion” is not limited to the one having a spherical surface that forms a true sphere. That is, it also includes a spherical surface that forms a deformed sphere whose longitudinal axis is somewhat longer than the horizontal axis and a deformed sphere whose longitudinal axis is slightly shortened relative to the horizontal axis (for example, an elliptical sphere or a capsule shape). It is also possible to use a spherical surface that forms an elliptical sphere, a deformed sphere with a constant curvature radius such as an oval shape).

  By adopting such a configuration, it is possible to fill the filling chamber of the mold body with more molding material than before, by increasing the amount of the molding material to be filled in the central extra length portion. Accordingly, in this state, when the lid is placed on the mold body and the recess is made into a sealed cavity, and then the rubber mold is loaded into the molding container of the CIP device, the molded body is manufactured. Even when a distorted spherical shape having a flattened shape is obtained, the height in the vertical direction of the molded body can ensure a dimension corresponding to the plane sectional diameter of the sphere.

Therefore, compared with the spherical size to be finally obtained, the rubber mold cavity size may be the minimum necessary size, and the cost of the molding material can be suppressed as much as possible. Naturally, waste such as processing cost and processing time related to polishing after molding can be eliminated.
Note that the provision of the central surplus portion only extends the cavity shape vertically, so that the filling material of the mold body can be filled with a molding material, or the mold body can be filled after molding. When taking out the molded body from the chamber, there are no operational problems (such as difficulty in filling the molding material and taking out the molded body). Also, there is no problem that the production cost of the rubber mold becomes high.

Preferably, the length of the central surplus portion is set based on a shrinkage rate at which the molding material shrinks during the cold isostatic pressing process.
By doing in this way, the waste of a molding material can be suppressed as much as possible, and the yield accompanying a process can be made favorable.
A plurality of recesses are defined in the mold body, and by placing the lid on the mold body, all the recesses are closed by the lid to form a plurality of cavities corresponding to the recesses. It may be a thing.

Thus, the manufacturing efficiency of a molded object can be raised by increasing the number of formation of a cavity.
More preferably, it has a second mold body in which a second recess having an upper opening that enables the molding material to be supplied is formed, and a second surface that can close the second recess is formed on the lower surface of the mold body. 2 opening closing surfaces are formed, and the second mold body is disposed on the upper portion of the mold body, so that the second recesses and the second opening closing surface make the second mold body second. It is preferable that the cavity is formed.

  Thus, by increasing the number of cavities formed, the manufacturing efficiency of the molded body can be further increased.

  The rubber mold for the cold isostatic pressing apparatus according to the present invention can eliminate waste in terms of processing cost, processing time, rubber mold manufacturing cost, etc., as well as costly waste of the molding material.

(A) is a sectional side view showing a conventional rubber mold, (B) is a sectional side view showing a first embodiment of a rubber mold according to the present invention. It is explanatory drawing which showed the process in which a spherical molded object is manufactured using the rubber mold of 1st Embodiment. It is the sectional side view which showed the state which loaded the rubber type | mold of 1st Embodiment to the CIP apparatus. The rubber mold | type 2nd Embodiment which concerns on this invention is shown, Comprising: (A) is a top view, (B) is the sectional view on the AA line of (A). It is the sectional side view which showed 3rd Embodiment of the rubber type | mold which concerns on this invention. It is the sectional side view which showed 4th Embodiment of the rubber type | mold which concerns on this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
1B and 2 show a first embodiment of a rubber mold according to the present invention.
This rubber mold 1 can be suitably used for a CIP device 2 as shown in FIG. 3, for example. In the rubber mold 1 according to the present invention, the CIP device 2 to be used is not particularly limited. First, the CIP device 2 illustrated in FIG. 3 will be briefly described in advance.

The CIP device 2 in FIG. 3 includes a forming container 3 formed in a vertical cylindrical shape, a disk-shaped upper lid 4 that closes the upper opening of the forming container 3, and a disk-shaped lower cover that closes the lower opening of the forming container 3. And a lid 5.
The lower portion of the upper lid 4 is formed to be slightly smaller in diameter as a fitting portion 4a that fits inside the upper opening of the molding container 3 and maintains a sealed state. The upper lid 4 is formed with a through hole 7 for introducing or discharging a pressure medium such as compressed air into the molding container 3.

  On the other hand, the upper portion of the lower lid 5 is formed with a small diameter as a fitting portion 5a that fits inside the lower opening of the molding container 3 and maintains a sealed state. The lower lid 5 includes an outer frame portion 10 that is vertically penetrated and provided with a central opening 8, and a central base portion 11 that is fitted to the central opening 8 of the outer frame portion 10 so as to be movable up and down. Have. The rubber mold 1 is placed on the central base 11.

  The lower part of the central base part 11 is supported by the base 12, and the base 12 can be moved up and down with the central base part 11. When the cradle 12 is lowered, the upper end portion of the central base portion 11 is pulled out downward from the central opening 8 of the lower lid 5, and the rubber mold 1 can be replaced with the central base portion 11 that has been pulled out. . Further, when the cradle 12 is raised, the upper surface of the central platform 11 protrudes upward from the central opening 8 of the lower lid 5 or is flush with the upper surface of the outer frame 10.

  A cylindrical wall rubber mold 15 is provided in the molding container 3 so as to surround the rubber mold 1 placed on the central platform 11 of the lower lid 5 in contact with the outer peripheral surface thereof. A lid rubber mold 16 that fits the wall rubber mold 15 while being in contact with the upper surface of the rubber mold 1 is provided on the upper portion of the rubber mold 1. Further, an external rubber mold 17 having a reverse cup shape is provided in a state of covering the wall rubber mold 15 and the cover rubber mold 16.

During operation of the CIP device 2, a press frame 18 is attached in a side fitting manner so as to surround the upper lid 4 and the lower lid 5 fitted and mounted on the upper and lower sides of the molding container 3. The repulsive force is carried.
Next, the rubber mold 1 according to the present invention will be described.
The rubber mold 1 has a mold body 20 and a lid body 21 placed on the mold body 20. Needless to say, the mold body 20 and the lid body 21 are formed of an elastic body such as rubber.

As shown in FIG. 1, the mold body 20 has a recess 25 that can be filled with a molding material. The concave portion 25 is formed by forming a cylindrical communication hole 25b extending upward in the ceiling portion of a hollow 25a having a slightly vertically long spherical shape (details will be described later).
That is, an upper end opening by the communication hole 25b is formed on the upper surface of the mold body 20, and a lower end opening by the communication hole 25b is formed on the inner ceiling of the cavity 25a. It is in communication.

The inner diameter d of the communication hole 25b is smaller than the inner diameter D of the cavity 25a when the cavity 25a is viewed in plan. Therefore, the ceiling portion of the cavity 25a has a shape that gradually decreases in diameter toward the lower end opening of the communication hole 25b (becomes an upper dent), and the diameter reduction becomes a spherical surface that is recessed upward. Is formed.
The lid body 21 is for sealing the recess 25 (communication hole 25 b) of the mold body 20 by being placed on the upper part of the mold body 20. The planar view shape of the lid body 21 is matched to the planar view shape and size of the mold body 20 and is circular in the first embodiment.

The lid body 21 is provided with a columnar fitting protrusion 21a that protrudes downward from the center of the lower surface. The fitting projection 21 a is adapted to fit into the communication hole 25 b of the recess 25 when the lid 21 is placed on the upper part of the mold body 20. The lower end portion of the fitting projection 21a is formed as a spherical surface that is recessed upward.
The curvature radius of the spherical surface formed at the lower end portion of the fitting protrusion 21a is the same as the curvature radius of the annular spherical surface formed at the ceiling portion of the cavity 25a in the recess 25. Therefore, as the fitting projection 21a is fitted in the communication hole 25b of the recess 25, the spherical surface at the lower end and the annular spherical surface formed on the ceiling of the cavity 25a are continuous without any step. Yes.

As described above, when the lid 21 is placed on the mold body 20, the communication hole 25b of the recess 25 is closed by the fitting protrusion 21a. As a result, the rubber mold 1 has an inner periphery of the cavity 25a. A sealed cavity 27 (molding chamber) is formed by the surface and the lower end surface of the fitting protrusion 21a.
The cavity 27 has a lower pressurizing part 30 that becomes a hemispherical concave part downward, and an upper pressurization that becomes a hemispherical concave part upward above the lower pressurizing part 30 so as to oppose the lower pressurizing part 30. A portion 31 and a central extra length portion (hereinafter referred to as a central pressure portion 32) in which the lower pressure portion 30 and the upper pressure portion 31 are communicated with each other through a straight cylindrical surface in the vertical direction.

That is, unlike the spherical cavity 101 provided in the conventional rubber mold 100 shown in FIG. 1A, as is clear from FIG. 1B, the rubber mold 1 according to the present invention has a central pressure. Due to the presence of the portion 32, the cavity 27 is formed in a vertically long spherical shape.
Note that the “hemispherical recesses” employed in the lower pressurizing unit 30 and the upper pressurizing unit 31 are each provided with a hemispherical surface that forms a true sphere having a diameter of D in the first embodiment. is there.

The lower pressurizing unit 30 and the central pressurizing unit 32 are formed by a region excluding the ceiling portion of the cavity 25a of the concave portion 25 in the mold body 20. On the other hand, the upper pressurizing part 31 is formed by a combination of a ceiling part region and a lower end surface of the fitting protrusion 21 a in the lid 21 in the cavity 25 a of the recess 25 in the mold body 20.
The center pressurizing part 32 is a circular space with a diameter of D in plan view. In addition, the inner peripheral surface of the central pressurizing portion 32 is a straight cylindrical inner surface that is not uneven. The communication distance h between the lower pressurizing unit 30 and the upper pressurizing unit 31 by the central pressurizing unit 32 is set in consideration of the contraction rate at which the molding material contracts during the cold isostatic pressing process.

In the first embodiment, the shape of the molded body to be manufactured is spherical (substantially true sphere), and ceramic powder is used as the molding material. About 10% of the radius (D / 2) of the sphere when viewed.
Note that if the communication distance h by the central pressure unit 32 is excessively increased, the amount of processing after molding (the amount of meat removed by machining or the like) to be described later increases, so the yield as a molding material tends to deteriorate rather. It becomes. Therefore, the upper limit of the communication distance h by the central pressure unit 32 may be determined as a range in which the yield as the molding material is allowed.

  By the way, it is assumed that the shape of the concave portion of the upper pressurizing unit 31 is less than a hemisphere (assuming that the internal height h1 of the upper pressurizing unit 31 is smaller than D / 2). In this case, since the central pressurizing part 32 is disposed closer to the upper pressurizing part 31, the amount of processing the molded body obtained after molding tends to increase somewhat, but the yield as a molding material is increased. If it is within the allowable range, such an arrangement of the central pressure unit 32 is also allowed.

On the other hand, it is assumed that the shape of the concave portion of the lower pressurizing unit 30 is less than a hemisphere (assuming that the internal height h2 of the lower pressurizing unit 30 is smaller than D / 2). In this case, the central pressurizing part 32 is arranged closer to the lower pressurizing part 30, but such an arrangement of the central pressurizing part 32 makes the shape of the molded body obtained after molding easily distorted. It is not preferable because it only makes it happen.
Furthermore, since the inner peripheral surface of the central pressure unit 32 strongly affects the surface shape of the molded body (printed), the central pressure unit 32 is connected to the lower pressure unit 30 and the upper surface. It is important to have a circular shape in plan view that matches the pressurizing unit 31, and to make the inner peripheral surface of the central pressurizing unit 32 a straight surface without unevenness.

Next, a situation in which a spherical molded body is manufactured using the rubber mold 1 of the first embodiment will be described based on FIGS.
As shown in FIG. 2A, the concave portion 25 of the mold body 20 is filled with a molding material M such as ceramic powder through the communication hole 25b. It is preferable to fill the mold material M so as to reach the middle of the communication hole 25b. At this time, the upper part of the filling surface of the molding material M is not spherical but is substantially flat.

In this state, as shown in FIG. 2 (B), the lid body 21 is placed on the mold body 20, and the rubber mold 1 is assembled. Thereby, in the cavity 27 formed by sealing the concave portion 25 of the mold body 20, a void 40 not filled with the molding material M is formed in the upper portion (below the fitting protrusion 21 a in the lid body 21). Become.
In this state, the rubber mold 1 is loaded into the molding container 3 of the CIP apparatus 2 and the CIP apparatus 2 is operated to pressurize the entire outer surface of the rubber mold 1. Thereby, the molding material M in the cavity 27 is formed as a molded body F by compressing and compressing the entire outer surface thereof as shown in FIG.

  In this molded body F, the lower half formed by the lower pressure part 30 of the cavity 27 is formed in a hemispherical shape that protrudes downward. However, the upper half formed by the upper pressurizing portion 31 of the cavity 27 is formed in a deformed hemispherical shape extending slightly upward due to the presence of the central pressurizing portion 32 of the cavity 27. Moreover, the upper surface of the upper half is partially flat because of the gap 40 (see FIG. 2B) generated by not being filled with the molding material M in the cavity 27.

  However, in the molded body F, the height of the upper half is secured to a dimension equal to or greater than the height of the lower half (the radius of the lower hemisphere). In short, as the overall dimension of the molded body F, it has the sphere diameter of the final molded body (sphere) to be obtained, and the outer circumference closer to the top of the upper half of the molded body F It can be said that an extra meat part (see symbol G shown in FIG. 2D) is attached so as to surround the.

  As shown in FIG. 2 (D), the molded body F formed in this way is taken out from the rubber mold 1, and in this molded body F, the excess meat portion G attached to the upper outer periphery of the upper half is polished or the like. Is removed by machining or the like, and finished into a shape (spherical shape) to be finally obtained. At this time, the processing allowance, processing time, and the like for the molded body F need only be those for the extra meat portion G.

  As is clear from the above description, in the rubber mold 1 according to the present invention, while the cavity 27 is formed, the amount of the molding material M to be filled in the central pressure part 32 is increased. Thus, more molding material M can be filled into the recess 25 of the mold body 20 than in the past. Therefore, if the molded body F is formed in this state, even if a distorted sphere with a flattened upper hemisphere is obtained, the height in the vertical direction is determined by the planar cross-sectional diameter of the sphere (final to be obtained). The dimension corresponding to the spherical diameter of the compact body can be secured.

  In this way, the cavity size of the rubber mold 1 may be a minimum size as compared with the spherical size to be finally obtained, and the cost of the molding material M can be suppressed as much as possible. . Naturally, waste such as processing cost and processing time related to polishing after molding can be eliminated. Therefore, waste of the molding material M can be suppressed as much as possible, and the yield associated with processing can be improved.

In the rubber mold 1, by providing the central pressure portion 32 in the cavity 27, the cavity shape is extended vertically, but the opening shape and the opening size of the communication hole 25 b are formed as the concave portion 25 of the mold body 20. There is no need to change anything in comparison with the prior art.
Therefore, the filling operation of the molding material M and the removal operation of the molded body can be performed as usual.
[Second Embodiment]
4A and 4B show a second embodiment of the rubber mold according to the present invention.

In the rubber mold 1 of the second embodiment, a plurality (three) of recesses 25 are defined in the mold body 20 inside the peripheral wall 24. The internal shape of each recess 25 is the same as in the first embodiment. The lid body 21 is provided with a fitting protrusion 21a that corresponds to the concave portion 25 of the mold body 20 and that matches the opening size of the communication hole 25b.
Therefore, when the lid body 21 is placed on the mold body 20, all the recesses 25 are sealed, and as a result, a plurality of cavities 27 corresponding to the respective recesses 25 are formed.

In the example shown in the figure, the number of recesses 25 (that is, the number of cavities 27) is three, but may be two or four or more.
As described above, since the number of the cavities 27 formed in the rubber mold 1 is increased, there is an advantage that the production amount of the molded body increases when the CIP device 2 is operated once.
[Third Embodiment]
FIG. 5 shows a third embodiment of the rubber mold according to the present invention.

The rubber mold 1 of the third embodiment is provided with a second mold body 50 (second mold body) below the mold body 20 so as to support the mold body 20 below the mold body 20. .
The second mold body 50 has substantially the same configuration as the mold body 20 described in the first embodiment, and a recess 53 (second recess) that can be filled with a molding material is formed therein. . The concave portion 53 is formed by forming a cylindrical communication hole 53b extending upward in the ceiling portion with respect to a slightly vertically long spherical cavity 53a.

On the other hand, the lower surface of the mold body 20 is provided with a fitting projection 55 that corresponds to the recess 53 of the second mold body 50 and matches the opening size of the communication hole 53b of the recess 53. Yes.
Therefore, by placing the mold body 20 on the second mold body 50, the recess 53 of the second mold body 50 is hermetically sealed. As a result, the cavity 57 corresponding to the recess 53 (second ) Is formed.

The cavity 57 has substantially the same configuration as the cavity 27 of the first embodiment, and a lower pressurizing part 60 that becomes a hemispherical concave part downward, and a lower pressurization above the lower pressurizing part 60. The upper pressurizing part 61 which becomes a hemispherical concave part upward so as to oppose the part 60, and the cylindrical central pressurizing part 62 connecting the lower pressurizing part 60 and the upper pressurizing part 61. It has become a thing.
As described above, in the rubber mold 1 of the third embodiment, since the number of cavities 27 and 57 formed is increased, the advantage that the production amount of the molded body is increased when the CIP device 2 is operated once. There is.
[Fourth Embodiment]
FIG. 6 shows a rubber mold according to the fourth embodiment.

The rubber mold 1 of the fourth embodiment adopts both the configuration adopted in the second embodiment (see FIGS. 4A and 4B) and the configuration adopted in the third embodiment (see FIG. 5). It is a thing.
That is, a plurality of recesses 25 are defined in the mold body 20, and a second mold body 50 is provided below the mold body 20 so as to support the mold body 20. Further, a plurality of recesses 53 are also defined in the second mold body 50.

As a result, compared to the second and third embodiments, more cavities 27 and 57 are provided, so that the production amount of the molded body associated with the single operation of the CIP device 2 is further increased. There is an advantage of increasing.
In addition, this invention is not limited to said each embodiment, It can change suitably according to embodiment.

  For example, the internal shape of the cavity 27 is not particularly limited. It is also possible to reversely analyze the shape of the molded body to make the cavity 27 an irregular shape (for example, an egg shape).

1 Rubber mold 2 CIP device (cold isostatic press)
DESCRIPTION OF SYMBOLS 3 Molding container 20 Type | mold main body 21 Cover body 25 Recessed part 27 Cavity 30 Lower pressurizing part 31 Upper pressurizing part 32 Central pressurizing part 50 Mold main body 53 2nd recessed part 57 2nd cavity 60 Lower pressurizing part 61 Upper pressurizing Part 62 Central pressurizing part

Claims (4)

A molding rubber mold that is housed in a molding container of a cold isostatic pressure pressurizer and pressurizes the entire outer surface,
The molding rubber mold has a mold body provided with a recess in an upper opening that enables supply of a molding material, and a lid that closes the opening of the recess by being placed on the mold body,
A cavity for molding a molding material is formed by the inner surface of the recess formed in the mold body and the opening closing surface of the recess by the lid,
The cavity has a lower pressurizing portion that becomes a hemispherical concave portion downward, and an upper pressurizing portion that becomes a hemispherical concave portion upward to be opposed to the lower pressurizing portion above the lower pressurizing portion, A rubber mold for a cold isostatic pressurizing apparatus, characterized in that the lower pressurizing part and the upper pressurizing part are constituted by a central surplus length part that communicates with a straight cylindrical surface.   2. The cold isostatic pressing according to claim 1, wherein the length of the central surplus portion is set based on a shrinkage ratio at which the molding material shrinks during the cold isostatic pressing process. Rubber mold for equipment.   A plurality of recesses are defined in the mold body, and by placing the lid on the mold body, all the recesses are closed by the lid to form a plurality of cavities corresponding to the recesses. The rubber mold for a cold isostatic pressurization device according to claim 1 or 2. A second mold body having a second recess having an upper opening that allows the molding material to be supplied; and a second opening closure capable of closing the second recess on a lower surface of the mold body The surface is formed,
A second cavity is formed in the second mold body by the second recess and the second opening closing surface by disposing the second mold body on the mold body. A rubber mold for a cold isostatic pressing device according to any one of claims 1 to 3.

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