JP2953596B2 - Mold form - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding mold, and more particularly, to a molding using a polymer elastic material, for example, which can rapidly mold a sphere or the like by a fluid pressure molding device. For formwork.

[0002]

2. Description of the Related Art Conventionally, when a spherical molded product made of, for example, ceramic is formed by a molding die used in a fluid pressure molding device, ceramic powder as a molding material is mixed with a molding material as shown in FIG. The lower mold 51 is filled with a hemispherical concave portion 52 formed on the upper surface of the lower mold 51 and then, as shown in FIG. The ceramic powder is filled into the concave portion 54 through a communication hole 55 communicating with the concave portion 54 provided in the upper die 53 to fill the spherical molding space formed by the concave portion 52 and the concave portion 54 with the ceramic powder. Alternatively, the lower mold 51 and the upper mold 53 are
4 and overlap so that a spherical molding space is formed,
Ceramic powder is filled into the spherical molding space from the communication hole 55.

Further, as shown in FIG. 13, a plurality of forming mold frames 50 each including the above-described lower mold 51 and upper mold 53 and filled with ceramic powder in a formed molding space are stacked. As shown in FIG.
Are arranged in a pressurized space 40 of a fluid press forming apparatus, for example, a rubber press (CIP) apparatus, and the recess 52 and the concave 5
4 isotropically pressurizes the ceramic powder filled in the molding space formed by (4). Thereafter, each mold 50 is removed from the pressurized space 40, and each mold 50 is separated as shown in FIG. Thereby, a large number of spherical moldings 56 can be obtained at one time.

[0004]

However, the production of a molded article using the molding mold requires an extremely complicated operation and a large number of molded articles as described below. There is a problem that cannot be molded. That is, as a complicated operation using the molding die, first, a pair of upper and lower dies are formed so that a spherical molding space is formed by the upper and lower hemispherical concave portions. And carefully overlap. Next, each of the spherical molding spaces is filled with the ceramic powder through the through hole.
After that, a large number of molds filled with ceramic powder in the molding space obtained by such an operation are overlaid one on top of the other. The molding frames are fixed to each other by an appropriate means such as an adhesive tape. A set of a plurality of molds fixed to each other is loaded into, for example, a rubber press molding apparatus, and a pressure molding operation is performed. As described above, it is extremely complicated to fill each of the molding spaces formed by the upper mold and the lower mold with the ceramic powder. Therefore, an object of the present invention is to provide a molding form using a polymer elastic body, which can improve the efficiency of a molding operation by performing structural improvement.

[0005]

Means for Solving the Problems The invention according to claim 1 for solving the above problems has a plurality of mold elements, each of which is formed of a polymer elastic body, Each of the upper and lower surfaces of each mold element has an upper engaging portion and a lower engaging portion with which adjacent ones engage in a stacked state. 3. A molding die frame, characterized in that a plurality of molding depressions are formed, and a communication hole communicating between the molding depressions formed on the upper surface and the lower surface of the mold element is formed. The invention described in (1) has a plurality of mold bodies, each mold body being formed of a polymer elastic body, and having an upper engaging portion and a lower engaging member in which adjacent ones engage in a laminated state. Each part has a mating part, and the upper and lower surfaces of each mold are formed when the molds are laminated. A plurality of molding recesses forming the shape of the mold element, and a through hole extending from the upper surface to the lower surface of each mold element is provided so as to penetrate each of the stacked mold elements. And a plurality of branch holes communicating with the mold.

[0006]

The molding form according to the first aspect is used as follows. First, an arbitrary number of type element fields are prepared. The upper engaging portion of one mold body is connected to the lower engaging portion of the other mold body. By repeating this, an arbitrary number of type element bodies are integrally connected. In a state where an arbitrary number of mold elements are stacked vertically, for example, a molding space corresponding to a molded product is formed by the molding recesses in one mold element and the molding recesses in the other mold element. In each mold element, since a communication hole is formed in the molding concave part formed on the upper surface and the molding concave part formed on the lower surface, the molded article formed by the stacked mold element bodies is formed. Are formed to communicate with each other by the communication holes. At this time, a molding recess is opened on the lower surface of the lowermost mold element vertically stacked, and a molding recess is opened on the upper surface of the uppermost mold element.

Therefore, a lower lid member is mounted on the lower surface of the lowermost mold element of the mold elements stacked vertically. As a result, the molding recess opening on the lower surface of the lowermost mold element is closed. Next, a forming raw material, for example, a ceramic powder is supplied to the upper surface of the uppermost mold element of the stacked mold elements. By applying, for example, an appropriate vibration to the stacked mold bodies, the ceramic powder is allowed to pass through the communication holes, and the molding space formed by each mold body is filled with the ceramic powder. After the filling is completed, the upper lid member is mounted on the upper surface of the uppermost die body among the stacked die bodies.

In this state, that is, the stacked mold bodies,
The lower lid member and the upper lid member are placed in a pressurized space in the fluid pressure molding apparatus while the upper lid member and the lower lid member are integrated. By pressurizing and filling the pressurized space with a fluid, an isotropic pressure is applied to the integrated body composed of the stacked mold elements, the lower lid member, and the upper lid member. As a result, the ceramic powder in the molding space is pressurized and molded into a certain shape. After the pressure molding, the integrated material is taken out of the pressure space. The upper cover member and the lower cover member are removed from the integrated body, and the respective mold elements are separated from each other to take out a compression-molded molded article having a predetermined shape.

The molding form according to the second aspect is used as follows. First, an arbitrary number of type element fields are prepared. A plurality of mold elements are stacked in the same manner as the molding mold according to claim 1. In this state, a molding space corresponding to the molded product is formed by the molding concave portion in one mold element and the molding concave portion in the other mold element. In addition, since each mold element is provided with a through hole, a through hole is formed in the stacked mold elements from the uppermost mold element to the lowermost mold element. In addition, since each mold element has a plurality of branch holes communicating with the through holes and the respective molding recesses on the lower surface side, the through holes and the branch holes are continuous spaces. In a plurality of the mold bodies stacked in this way, a molding recess is opened on the lower surface of the lowermost mold body vertically stacked, and a molding recess is opened on the upper surface of the uppermost mold body. doing.

Therefore, a lower lid member is attached to the lower surface of the lowermost die body of the vertically stacked die bodies. As a result, the molding concave portion and the through hole that are opened on the lower surface of the lowermost mold element are closed. Next, a forming raw material, for example, a ceramic powder is supplied to the upper surface of the uppermost mold element of the stacked mold elements. By giving, for example, appropriate vibrations to the stacked mold bodies, ceramic powder is allowed to pass through the through holes. The ceramic powder guided to the through hole is filled into each molding space via the branch hole. After filling each molding space with the ceramic powder, the ceramic powder present in the through-hole is removed by an appropriate method. A filling member made of the same material as that of the mold element is loaded into the empty through-hole which has become an empty space.
Thereafter, the upper lid member is mounted on the upper surface of the uppermost die body among the stacked die bodies.

In this state, ie, the stacked mold bodies,
The lower lid member and the upper lid member are placed in an integrated state in a pressurized space in the fluid pressure forming apparatus while the lower lid member and the upper lid member are integrated, and the ceramic powder is added in the same manner as in the case of the forming mold in claim 1. Press molding is performed, and each molded body is taken out after molding.

[0012]

Next, embodiments of the present invention will be described in detail. FIG.
FIG. 2 is a cross-sectional view showing a mold body constituting a molding mold according to an embodiment of the present invention, FIG. 2 is a perspective view showing the mold body, and FIG. FIG. A molding mold according to an embodiment of the present invention has a plurality of mold bodies 1 as shown in FIGS. 1 and 2.

As shown in FIGS. 1 and 2, the mold body 1 has twelve hemispherical upper opening recesses 3 formed on the upper surface of a substantially disc-shaped mold body main body 2. . The lower surface of the mold body 2 is located at a position corresponding to the upper opening recess 3.
Two hemispherical lower opening recesses 4 are provided. 12
Of the nine upper opening recesses 3, nine upper opening recesses 3 are formed such that the center of each upper opening recess 3 on the circular opening surface is virtually drawn with a certain radius from the circular center of the mold element body 2. It is opened so that each center on the opening surface of each upper opening concave part 3 is located at equal intervals on the circumference. The remaining three upper opening recesses 3 are arranged at equal intervals on a virtual circumference located inside a virtual circumference formed by arranging the nine upper opening recesses 3. So that the centers of the upper opening concave portions 3 in the circular opening surface are aligned.
Be established. The upper opening recess 3 and the corresponding lower opening recess 4 located immediately below the upper opening recess 3 communicate with each other through a communication hole 5.

The mold body 1 is provided with an annular flange 6 protruding from the upper surface of the mold body 1 at an edge portion on the upper surface thereof. The flange 6 has three notches 7 for positioning at its upper end. The three positioning notches 7 have a shape that is substantially rectangular when viewed from the side surface of the mold body 1. The three positioning notches 7 are provided so as to form a central angle of 120 degrees with the adjacent positioning notches 7.

The inner surface of the flange 6 is formed with a tapered surface 8 so that the diameter thereof is reduced.
The base of the tapered surface 8 has an annular groove 9 formed annularly along the flange portion 6 and hollowed out to have a semicircular cross section.

On the other hand, the mold element 1 has an edge portion on the lower surface at a position corresponding to the positioning notch 7, in other words, on the side surface of the mold element 1, A positioning projection 10 having the same shape as the positioning notch 7 is provided at an edge portion located immediately below the provided position. Since the positioning projections 10 are provided corresponding to the positioning notches 7, the number of the positioning projections 10 is three, and the central angle between the adjacent positioning projections 10 is 120 degrees. is there.

On the lower surface of the mold body 1, a mold body 1
If the space defined by the upper surface of the upper surface, the flange portion 6, the tapered surface 8 of the flange portion 6 and the annular groove 9 is a female type, the cross-section is substantially so as to be a male type that can be fitted to the female type. A semicircular annular protrusion 11 and a mold element 1
And a tapered surface 12 directed toward the peripheral surface of. The mold element 1 is integrally formed of an elastic polymer such as silicone rubber, urethane rubber, butadiene rubber, and isoprene rubber.

On the other hand, as shown in FIG.
Has a disk shape having the same diameter as the mold body 1. The upper surface of the lower lid member 13 has the same structure as the upper surface of the mold element 1. That is, the upper surface of the lower lid member 13 has an upper opening recess 13a having the same shape, number, and positional relationship as the upper opening recesses 3 in the mold body 1, and is provided on the lower surface of the mold body 1. However, the male mold formed by the annular protrusion 11 having a substantially semicircular cross section and the tapered surface 8 extending from the annular protrusion 11 toward the peripheral surface of the mold element 1 can be fitted. It has a flange 6a, a tapered surface 8a of the flange 6a, and an annular groove 9a similar to those in the mold body 1. The lower cover member 13 includes a mold element 1
The communication hole 5 is not provided. That is, the lower lid member 13 has no kind of through-hole that passes from the upper surface to the lower surface, and thereby functions as a bottom lid.

As shown in FIG. 3, similarly to the lower surface of the mold element 1, the upper lid member 14 has an annular protrusion 11a having a substantially semicircular cross section, and a peripheral part of the mold element 1 from the annular protrusion 11a. And a tapered surface 12a directed toward the upper surface. Further, unlike the lower surface of the mold element 1, it has the same opening diameter as the upper opening recess 3 provided on the upper surface of the mold element 1, and the opening position of the upper opening recess 3 Are provided with the same number of hemispherical lower convex portions 15 as the upper opening concave portions 3. Assuming that the space formed by the upper surface of the mold element 1, the flange portion 6, the tapered surface 8 of the flange portion 6 and the annular groove 9 is a female mold, the lower convex portion 15 and the annular projecting portion having a substantially semicircular cross section are provided. 11a and a tapered surface 12 extending from the annular projecting portion 11a to the peripheral surface of the mold body 1.
With (a), a male mold fitted to the female mold is formed.

Next, the operation of the mold will be described. The forming mold is formed by stacking a plurality of mold elements 1. That is, first, the upper surface of one mold body 1 and the lower surface of the other mold body 1 are overlapped. In this case, when the annular projection 11 of the other mold element 1 is applied to the flange 6 of the one mold element 1 and the other mold element 1 is pressed toward the upper surface of the one mold element 1. , The other annular projection 11 is provided on one mold element 1
Of the flange 6 at the tapered surface 8.

When the positioning protrusion 10 on the other mold element 1 and the positioning notch 7 on the one mold element 1 do not correspond to each other,
When the positioning projection 10 on the other mold element 1 contacts the upper end surface of the flange 6 on the one mold element 1, the other mold element 1 is moved toward the upper surface of the one mold element 1. Even when pressed, the upper surface of one mold element 1 and the other mold element 1
Does not adhere to the lower surface of

Therefore, the other mold element 1 is replaced with the one mold element 1.
When the other mold element 1 is rotated so as to rub against each other, the notch 7 for positioning on one mold element 1 and the projection 10 for positioning on the other mold element 1 coincide with each other. Then, the annular protrusion 11 of the other mold element 1 advances against the resistance of the tapered surface 8 of the flange 6 of the one mold element 1, and the annular protrusion 11 fits into the annular groove 9. At the same time, positioning notch 7
The positioning projection 10 fits into the projection. Thereby, one mold element 1 and the other mold element 1 are firmly and integrally joined.

In this coupled state, the upper surface of one mold element 1 and the lower surface of the other mold element 1 are in close contact with each other, and the upper surface of one mold element 1 is opened. The upper opening concave portion 3 and the lower opening concave portion 4 formed on the lower surface of the other mold element 1 coincide with each other, and a molding space is formed by the coincidence. As described above, in this embodiment, since the positioning notch 7 and the positioning projection 10 are provided in the mold body 1, one mold body 1 and the other mold body 1 are overlapped. By simply rotating one or both of the mold elements 1 in combination, the upper opening recess 3 in one mold element 1 and the lower opening recess 4 in the other mold element 1 can be aligned. .

The mold element 1 is provided with a flange 6, a tapered surface 8 and an annular groove 9 on its upper surface, and an annular protrusion 11 and a tapered surface 12 on its lower surface. The upper surface of one mold body 1 and the lower surface of the other mold body 1 can be easily fitted by the relationship between male and female,
The mold elements 1 can be combined.

By joining the two mold elements 1 as described above, the upper opening recess 3 and the lower opening recess 4
Two molding spaces 3 are formed.

The two combined mold elements 1 are combined with one other mold element 1 in the same manner as described above. As a result, 24 molding spaces are formed by the three joined mold elements 1. At this time, each of the twelve spherical molding spaces formed by the first mold element 1 and the second mold element 1 is composed of the second mold element 1 and the third mold element. Each of the spherical molding spaces 3 formed by the body 1 is spatially connected by a communication hole 5.

By repeating the above operations, in other words, by stacking a predetermined number of mold elements 1, a required number of spherical molding spaces are formed. In this state, as shown in FIG. 3, the spherical molding spaces formed by the mold elements 1 are arranged in a vertical line, and the molding spaces arranged in a vertical line are spatially connected to each other by the communication holes 5. ing.
In a state where the plurality of mold elements 1 are vertically stacked as described above, the lower surface of the mold element 1 located at the lowermost portion has the lower opening concave portion 4 opened, and the mold element 1 located at the uppermost portion is opened. The upper opening concave portion 3 is opened on the upper surface of the substrate.

Therefore, the lower cover member 13 is attached to the lowermost mold element 1.
To join. This combining operation is basically the same as combining the type body 1 with another type body 1. This is because a flange 6a, a tapered surface 8a, and an annular groove 9a are provided on the upper surface of the lower lid member 13 similar to those provided on the mold body 1. Therefore, a detailed description of the joining operation between the lower lid member 13 and the lowermost mold element 1 will be omitted.

In any case, when the lower lid member 13 is connected to the lowermost mold element 1, as shown in FIG. Are formed in the vertical direction, and the respective molding spaces are connected to each other through the communication holes 5.

In this state, when, for example, ceramic powder is supplied to the upper surface of the uppermost mold element 1 and an appropriate vibration is applied to the molding frame, the ceramic powder is supplied to the upper surface of the uppermost mold element 1. Ceramic powder is filled into each spherical molding space through the communication hole 5. After all the molding spaces are filled with the ceramic powder in the respective molding spaces and the communication holes 5, the upper lid member 14 is thereafter mounted on the upper surface of the uppermost mold element 1.

The mounting operation is basically the same as the connection operation between the mold elements 1. That is, the female mold formed by the annular groove 9 and the tapered surface 8 provided in the mold body 1 has the annular projecting portion 11 a and the tapered surface 1 in the upper lid member 14.
The male mold formed by 2a is fitted. In this manner, the molding space and the communication hole 5 are filled with the ceramic powder, and the integrated mold frame 16 in which the plurality of mold elements 1, the lower lid member 13, and the upper lid member 14 are integrally joined is formed. , A fluid pressure molding device (not shown) such as a rubber press (CI
P) It is housed in the pressurized space of the device. In the pressurized space of the rubber press device, the integrated formwork 16 is disposed on the bottom surface of the pressurized space, and the bottom surface of the lid member that closes the pressurized space is placed on the upper surface of the upper lid member 14 in the integrated formwork 16. Abut. In the pressurized space, a fluid is press-fitted into a space formed by the peripheral surface of the integrated mold frame 16 and the inner wall of the pressurized space.

When the fluid is press-fitted, fluid pressure is directly applied to the peripheral side surface of the integrated mold 16 by the pressurized fluid, and the integrated mold 16 is compressed. The compressed integrated form 16 is swelled up and down, but is pressed up and down because it is regulated by the bottom surface and the lid member in the pressurized space above and below. As a result, the ceramic powder in the molding space is molded under an isotropic pressure.

After the pressure molding, the integrated mold 16 is taken out of the pressure space. Upper lid member 14 in integrated formwork 16
When the lower lid member 13 is removed, and then each mold element 1 is removed, a ceramic molded body having a spherical shape smaller in diameter than the sphere formed by the molding space is obtained. In the state where each mold element 1 is removed, the spherical ceramic molded body is connected by a ceramic rod formed by the communication hole 5, and this rod is removed from the spherical ceramic molded body, for example. By cutting off, each spherical ceramic molded body can be separated.

As described in detail above, according to this embodiment, a plurality of mold elements 1 are stacked, then the lower lid member 13 is attached, and then ceramic powder is supplied to the uppermost mold element 1. The ceramic powder can be filled in the molding space 3 formed by the mold elements 1 only by applying appropriate vibration to the stacked mold elements 1. Then, after the ceramic powder is filled, by mounting the upper lid member 14,
An integral form can be formed. By loading the integrated mold into a fluid pressure molding device and performing pressure molding, a large number of spherical ceramic molded bodies can be manufactured at once. Therefore, by using the forming mold in this embodiment, as in the prior art, the lower mold and the upper mold are overlapped, or the molding space formed by the lower mold and the upper mold is filled with ceramic powder one by one, This eliminates the need for complicated operations such as further stacking the integrated mold frame of the upper mold and the lower mold filled with ceramic powder.

Although the first embodiment of the present invention has been described above, it goes without saying that the invention described in the first embodiment can be variously modified within the scope of the first embodiment. For example, in the above embodiment,
The upper opening recess 3 is provided on the upper surface of the mold body 1 so as to be located directly above the lower opening recess 4 provided on the lower surface of the mold body 1. The communication hole 5 is provided so that the distance connecting the two becomes the shortest distance. However, as shown in FIG. 4, the communication hole 5 is provided at a position which is not directly above the lower opening concave portion 4 provided on the lower surface of the mold element 1. The upper opening concave portion 3 may be provided on the upper surface of the mold body 1 so as to be formed.

That is, when viewed from above, the mold body 1
The center of the lower opening recess 4 provided on the lower surface of the mold body 1 and the center of the mold body 1 with respect to a straight line connecting the center of the upper opening recess 3 provided on the upper surface of the mold body 1 and the center of the mold body 1. The upper opening concave portion 3 and the lower opening concave portion 4 may be opened with a positional relationship deviated from each other so that the line connecting the right and left crosses at a certain angle.

In this case, the lower opening concave portion 4 and the upper opening concave portion 3 are spatially connected by a communication hole 5 formed obliquely. When a large number of the mold bodies 1 shown in FIG. 4 are connected, a molding space formed by the upper opening concave portion 3 and the lower opening concave portion 4 and a continuous space formed by a communication hole 5 connecting the upper and lower molding spaces. However, it is better to draw a spiral as a whole. In the above embodiment, each of the upper opening concave portion and the lower opening concave portion has a hemispherical shape, but in the invention described in claim 1, the shape of the upper opening concave portion and the lower opening concave portion is a shape of a desired molded body. It can be arbitrarily selected depending on the situation.

Next, an embodiment of the present invention will be described in detail. FIG. 5 is a cross-sectional view showing a mold body constituting a molding die frame according to an embodiment of the invention according to claim 2, FIG. 6 is a perspective view showing the mold body, and FIG. It is sectional drawing which shows a mold. A forming mold according to an embodiment of the present invention has a mold body 21A as shown in FIGS.

As shown in FIGS. 1 to 7, the mold element 21A has nine hemispherical upper opening recesses 23A formed on the upper surface of a substantially disc-shaped mold element main body 22A. Nine hemispherical lower opening recesses 2 are also provided on the lower surface of the mold body 22A.
4A has been established. The nine upper opening recesses 23A are:
The center of each upper opening recess 23A in the circular opening surface is located on a circumference virtually drawn with a certain radius from the circular center of the mold element body 22A, and the opening of each upper opening recess 23A on the circumference. It is opened so that each center on the surface is lined up at equal intervals. Also in the nine lower opening recesses 24A, the center of the circular opening surface of each lower opening recess 24A is located on a circumference virtually drawn with a certain radius from the circular center of the mold element body 22A, and the circumference thereof is On the upper side, the openings are opened such that the centers of the opening surfaces of the lower opening recesses 24A are arranged at equal intervals. However, the positional relationship between the upper opening recess 23A and the lower opening recess 24A is determined by nine upper opening recesses 2.
The nine lower opening recesses 24A are adjusted so as to be opened so as to be shifted by a half pitch from the opening pitch of 3A.

On the other hand, in this embodiment,
Another mold element 21B is used together with 1A.

The mold body 21B differs from the mold body 21A in the following points. That is, as shown in FIG. 7, when the upper surface of the mold body 21A and the lower surface of the mold body 21B overlap each other, the mold body 21B
23A of the upper opening and the lower opening 24B of the mold body 21B coincide with each other to form a molding space for a stadium.
When the upper surface of the mold body 21B and the lower surface of the mold body 21A are overlapped, the upper opening recess 23B of the mold body 21B coincides with the lower opening recess 24A of the mold body 21A to form a spherical molding space. The upper opening concave part 23B and the lower opening concave part 24B in the mold element body 21B are perforated in the upper surface and the lower surface so as to form.

Since there is no difference between the mold body 21A and the other mold body 21B except for the opening positions of the upper opening recess and the lower opening recess, the mold body 21A will be described in detail below. The description of the other mold element 21B will be omitted.

The mold body 21A has an annular flange 26A protruding from the upper surface of the mold body 21A at an edge of the upper surface. The flange 26A has three positioning notches 27A formed at its upper end. The three positioning notches 27A are substantially rectangular when viewed from the side surface of the mold body 21A.
It has a shape. The three positioning notches 27A are provided so as to form a central angle of 120 degrees with the adjacent positioning notches 27A.

The inner surface of the flange portion 26A is substantially perpendicular to the upper surface of the mold body 21A. And, at the base of the inner surface of the flange 26A,
An annular groove 29A is formed along the flange 26A in an annular shape and is hollowed out to have a semicircular cross section.

On the other hand, the mold body 21A has an edge portion on the lower surface at a position corresponding to the positioning notch 27A, in other words, on the side surface of the mold body 21A, the positioning notch 27A. The positioning notch 2 is provided at an edge portion located immediately below the provided position.
A positioning projection 30A having the same shape as that of 7A is provided. Since the positioning projections 30A are provided corresponding to the positioning notches 27A, the number of the positioning projections 30A is three, and the adjacent positioning projections 30A are provided.
The central angle between them is 120 degrees.

On the lower surface of the mold body 21A, the space formed by the upper surface of the mold body 21A, the flange 26A, the inner surface of the flange 26A and the annular groove 9 is a female mold. A disk portion 32A protruding from the lower surface of the mold body 21A so as to be a male type that can be fitted to the female type, and an annular protrusion 31A having a substantially semicircular cross section formed on a peripheral side surface of the disk portion 32A. Are formed.

On the upper surface of the mold element 21A, a through hole 33A having a diameter smaller than the opening diameter of the upper opening concave portion 23A and extending from the upper surface to the lower surface is provided at the center of the circle. In the inner peripheral surface of the through hole 33A, an opening is formed near the upper surface of the mold body 21A and each lower opening recess 2 is formed.
9 branch holes 3 obliquely opened to communicate with 4A
4A. Each of the lower opening recesses 24A has an air vent hole 3 that opens on the inner surface of the lower opening recess 24A and opens near the flange 26A on the peripheral side surface of the mold element 21A.
5A is provided.

The mold body 21A is integrally formed of an elastic polymer such as silicone rubber, urethane rubber, butadiene rubber, isoprene rubber or the like. In this embodiment, in order to manufacture a spherical molded body, the mold element 21A, another mold element 21B, the lower lid member 36, the upper lid member 37, and a filling member (not shown) are used.

As shown in FIG. 7, the lower cover member 36 has a disk shape having the same diameter as the mold body 21A. The upper surface of the lower lid member 33 has the same structure as the upper surface of the mold element 21A. That is, on the upper surface of the lower lid member 33, the upper opening concave portion 23 of the mold body 21A is provided.
Upper opening recess 38 having the same shape, number and positional relationship as
38, and a male mold formed by a disc portion 32A protruding from the lower surface of the mold element body 21A and an annular protruding portion 31A having a substantially semicircular cross section provided on the peripheral side surface thereof can be fitted. To be able to do so, the same as in the mold body 21A,
The collar 39 includes a flange 39, an inner surface of the flange 39, and an annular groove 40 provided on the inner surface. The lower lid member 33 is not provided with the through-hole 33A as in the mold body 21A. That is, the lower lid member 33 does not have any kind of through-hole or branch hole that passes from the upper surface to the lower surface, and thereby functions as a bottom lid.

As shown in FIG. 7, the upper lid member 37 has a lid body having the same diameter as that of the mold body 21A and protrudes from the lower surface of the lid body as in the lower surface of the mold body 21A. Disk portion 41 and an annular protruding portion 42 having a substantially semicircular cross section and protruding from a peripheral side surface of the disk portion 41.
Unlike the lower surface of the mold body 21A, it has the same diameter as the upper opening recess 23A provided on the upper surface of the mold body 21A, and has an upper portion at a position corresponding to the opening position of the upper opening recess 23A. The same number of hemispherical lower convex portions 43 as the number of open concave portions 23A are provided. Further, a positioning projection 44 corresponding to the positioning notch 27A in the mold body 21A protrudes from an edge portion of the lower surface of the upper lid member 37. As a result, assuming that the space formed by the upper surface of the mold element body 21A, the flange 26A, and the annular groove 29A formed on the inner surface of the flange 26A is a female mold, the disk 41 and the disk 41 The lower convex portion 43 provided on the lower surface and the annular projecting portion 41 provided on the peripheral side surface of the disk portion 41 form a male mold fitted to the female mold.

The filling members are a mold body 21A and a mold body 21B.
Is a solid rod-shaped member formed of the same material as the mold element and having a diameter and a length that are mounted in a cylindrical space formed by a series of through holes 33A formed by alternately stacking .

Next, the operation of this embodiment will be described.
The molding frame is formed by alternately stacking the mold bodies 21A and 21B. That is, first, one type element 2
The upper surface of 1A overlaps the lower surface of the other mold element 21B. In this case, the annular projection (not numbered) of the other mold element 21B is applied to the flange 26A of one mold element 21A, and the other is projected toward the upper surface of one mold element 21A. When the mold element 21B is pressed, the other annular protrusion receives resistance from the flange 26A of the one mold element 21A.

When the positioning projection (not numbered) on the other mold element 21B and the positioning notch 7 on one mold element 21A do not correspond to each other, the other The positioning protrusion of the mold element 21B is a flange 26 of the one mold element 21A.
A by contacting the upper end surface of the first mold element 21A
Pressing the other mold element 21B toward the upper surface of
The upper surface of one mold element 21A does not adhere to the lower surface of the other mold element 21B.

Then, while pressing the other mold element 21B against the one mold element 21A and rotating the other mold element 21B so as to rub against each other, the one mold element 2B is rotated.
When the positioning notch 27A in 1A matches the positioning protrusion in the other mold element 21A, the annular protrusion in the other mold element 21B reduces the resistance of the flange 26A of the one mold element 21A. The positioning protruding portion is fitted into the positioning notch 27A at the same time as the annular protruding portion is fitted into the annular groove 29A. Thereby, one mold element 21A and the other mold element 21B are firmly and integrally connected.

In this combined state, the upper surface of one mold body 21A and the lower surface of the other mold body 21B are in close contact with each other, and the upper surface of one mold body 21A is opened. The upper opening concave portion 23A and the lower opening concave portion 24B formed on the lower surface of the other mold element 21B coincide with each other, and a spherical molding space is formed by the coincidence. Next, the mold body 2 connected to the upper surface of the mold body 21A
1B, the lower surface of the mold element 21A is connected in the same manner as described above, and the upper surface of the connected mold element 21A is connected to the mold element 21B in the same manner as described above. The number of model elements 21A and 21B are alternately connected.

As described above, in this embodiment, since the positioning notch 27A and the positioning projection 30A are provided in the mold body 21A, one mold body 2A is provided.
1A and the other mold element 21A are overlapped, and only one or both mold elements are rotated, and the upper opening recess 23A in one mold element 21A and the lower opening recess in the other mold element 21A are formed. 24B can be aligned.

The mold body 21A has a flange 26A and an annular groove 29A on its upper surface, and a disk portion 32A and an annular protrusion 29A on its lower surface. With this relationship, the upper surface of one mold element 21A and the lower surface of the other mold element 21A can be easily fitted, and the mold elements can be joined together.

In FIG. 7, four mold elements 21A and 4
The number of mold elements 21B are alternately stacked and combined, in other words, the required number of spherical molding spaces are formed by alternately stacking a predetermined number of mold elements 21A and the same number of mold elements 21B. It is formed. In this state, FIG.
As shown in FIG. 7, a cylindrical space is formed by the continuation of the through holes 33A. This cylindrical space communicates with the spherical molding space via a branch hole 34A. In a state where the plurality of mold elements 21A and 21B are vertically stacked as described above, the lower surface of the mold element 21A located at the lowermost portion is opened with the lower opening concave portion 24A, and the mold element located at the uppermost portion is opened. Body 21B
The upper opening recessed part 23B is opened in the upper surface of.

Then, the lower lid member 33 is connected to the lowermost mold element 21A. This joining operation is basically the same as joining the mold body 21A to another mold body 21B. This is because the upper surface of the lower lid member 33 is provided with a flange 39 and an annular groove 40 similar to those provided in the mold body 21A. Therefore, a detailed description of the joining operation between the lower lid member 33 and the lowermost mold element 21A is omitted.

In any case, when the lower lid member 33 is joined to the lowermost mold element 21A, as shown in FIG. 7, the two upper mold elements 21A and 21B are joined to form the upper opening recess 23A and the lower opening recess 23A. 24B are formed in the vertical direction, and each of the molding spaces is formed with branch holes 34A, 34B.
Through the through hole 33A, a state of communication with the cylindrical space formed by the continuation of the through holes 33A is formed.

In this state, when the ceramic powder is supplied from the through-hole 33B in the uppermost mold element 21B and an appropriate vibration is applied to the forming mold, the through-hole 33A,
Ceramic powder is filled into each spherical molding space via 33B and branch holes 34A and 34B. At this time, since the air vent holes 35A and 35B are provided, the filling of the ceramic powder into the molding space is performed smoothly. After all the molding spaces are filled with the ceramic powder into the molding spaces and the communication holes 5, and the filling member is loaded into the cylindrical space formed by the through holes 33A and 33B, the upper surface of the uppermost mold element 21B is formed. The upper cover member 37 is attached to the. Since the mounting operation of the upper cover member 37 is basically the same as the connecting operation of the mold elements 21A, the detailed description of the operation is omitted.

In this way, each molding space is filled with ceramic powder, and a plurality of mold elements 21A, 21
A spherical molded body is manufactured by performing an operation of molding ceramic powder on an integrated mold in which B, the lower lid member 33, and the upper lid member 37 are integrally joined, in the same manner as in the embodiment relating to claim 1. can do.

Although the embodiment according to claim 2 has been described above, the invention according to claim 2 is not limited to the embodiment.

For example, instead of the mold body in the above embodiment, a mold body in which the opening position of the upper opening recess provided on the upper surface and the opening position of the lower opening recess provided on the lower surface are made to coincide with each other vertically. Can also be used. This mold element is the same as the mold elements 21A and 21B in the above embodiment except that the opening positions of the upper opening concave portion and the lower opening concave portion are different. As described above, when the lower opening recess is formed in the lower surface of the mold body so as to be located immediately below the upper opening recess provided on the upper surface of the mold body, two types of molds are formed as in the above embodiment. It is not necessary to use the element bodies 21A and 21B, and the same operation and effect as in the above embodiment can be obtained by stacking a type of element bodies.

Further, even if the positional relationship between the upper opening recess formed in the upper surface of the mold body and the lower opening recess formed in the lower surface thereof is the same as that of the mold body 21A in the above-described embodiment, the positioning cut-out is provided. By appropriately adjusting the position of the notch, a molding die frame can be formed by merely stacking one type of element body 21A without using another element body 21B.

In the above embodiment, the upper and lower openings are both hemispherical, but the upper opening and the lower opening matching the upper opening are rectangular, tetrahedral, elliptical and cubic. , Cylinders, cones, triangular pyramids, and other irregular shapes. In particular, since this mold element is formed of an organic elastic body, it may be an upper opening recess and a lower opening recess having an internal shape that is wider than the openings in the upper opening recess and the lower opening recess.

[0067]

In any of the first and second aspects of the present invention, the molding space formed by a large number of mold elements can be filled with ceramic powder or the like in a single operation. Very simple. In addition, since a molding space can be formed by using at least one mold element and using a large number of the mold elements, labor due to the use of the upper mold frame and the lower mold frame as in the related art can be omitted. .

[Brief description of the drawings]

FIG. 1 is a sectional view showing a mold body used in an embodiment of the invention according to claim 1;

FIG. 2 is a perspective view showing a mold body used in one embodiment of the invention according to claim 1;

FIG. 3 is a cross-sectional view showing a forming mold formed by assembling a mold element, a lower lid member, and an upper lid member used in one embodiment of the invention according to claim 1;

FIG. 4 is a plan view showing a mold element used in another embodiment of the invention according to claim 1;

FIG. 5 is a sectional view showing a mold element used in one embodiment of the invention according to claim 2;

FIG. 6 is a perspective view showing a mold element used in one embodiment of the invention according to claim 2;

FIG. 7 is a cross-sectional view showing a molding frame formed by assembling a mold element, a lower lid member, and an upper lid member used in one embodiment of the invention according to claim 2;

FIG. 8 is a schematic sectional view showing a lower mold frame of a conventional molding mold.

FIG. 9 is a cross-sectional view showing a conventional forming mold formed by stacking a lower mold and an upper mold.

10 is a conceptual diagram showing a state where the molding die shown in FIG. 9 is arranged in a pressure space in a pressure molding device.

FIG. 11 is a conceptual explanatory view showing a state where a molded body is obtained using a conventional molding die.

[Explanation of symbols]

 Reference Signs List 1 mold body 2 mold body main body 3 upper opening concave portion 4 lower opening concave portion 5 communication hole 6 flange portion 6a flange portion 7 positioning notch portion 8 taper surface 8a taper surface 9 annular groove 9a annular groove 10 positioning protrusion 11 Annular protruding portion 11a Annular protruding portion 12 Tapered surface 12a Tapered surface 13 Lower lid member 13a Upper opening concave portion 14 Upper lid member 21A Type element 22A Type element body main body 23A Upper opening concave 23B Upper opening concave 24A Lower opening concave 24B Lower opening concave 26A Collar 27A Positioning cutout 29A Annular groove 30A Positioning projection 31A Annular projection 32A Disk 33A Through hole 33B Through hole 34A Branch hole 34B Branch hole 35A Air vent hole 36 Lower cover member 37 Upper cover member 38 Upper opening recess 39 Flange 40 Annular groove 41 Disk part 42 Annular projection 43 Downward projection 4 positioning projection

Claims (2)

(57) [Claims] 1. A plurality of mold bodies, each mold body being formed of a polymer elastic body, and an upper engaging portion and a lower engaging member in which adjacent ones engage in a laminated state. Each of the mold elements has an upper surface and a lower surface, and a plurality of molding recesses are formed on each of the upper and lower surfaces of the mold elements to form the shape of a molded product when the mold elements are stacked, and formed on the upper and lower surfaces of the mold element. A molding form characterized by forming a communication hole communicating between the formed molding recesses. 2. An upper body and a lower body having a plurality of mold bodies, each mold body being formed of a polymer elastic body, and adjacent bodies engaging with each other in a laminated state. Each of the upper and lower surfaces of each mold element has a plurality of molding recesses that form the shape of a molded product when the mold elements are stacked, and penetrates each of the stacked mold elements. Wherein a through hole extending from an upper surface to a lower surface of each of the mold elements is provided, and a plurality of branch holes communicating with the through hole and each of the forming recesses on the lower surface are formed.