JP2916087B2 - Molding mold for curved tiles and method for manufacturing mold - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dry molding method of a curved tile in which a tile material made of powder is filled in a mold and compression-molded, and a curved shape capable of giving an accurate shape to a fired curved tile. The present invention relates to a method of manufacturing a mold for bent tiles, which employs a simple manufacturing method for a mold for a tile and the manufacture of the mold.

[0002]

2. Description of the Related Art Conventionally, when a curved tile is formed by dry molding as in a conventional molding die shown in FIGS.
An elastic body b such as urethane rubber is provided on the surface of the tile back mold a in order to form a back foot having a high adhesive effect on the back of the bent tile.
Are bonded so that the surface becomes streaks of an uneven pattern, for example, an elastic body b having an uneven plate shape having a plurality of projections d in a parallel state is bonded, or a plurality of parallel bodies are formed in parallel with a lower mold c made of metal. Of the elastic body b.

[0003] In addition, when filling a tile material into a molding die in general tile molding, it is extremely difficult to obtain a uniform filling density due to the characteristics of the raw material powder and the structure of the filling device, and it is difficult to obtain a uniform density. When the molded body pressed in is fired, it is difficult to obtain an accurate shape by deforming due to firing shrinkage, and in a mold using the tile back mold a to which the elastic body b is bonded, Although the elastic body b contracted slightly to absorb unevenness in filling of the raw material, it was not satisfactory.

[0004] In order to solve such non-uniform compression molding in the general tile molding, molding of a tile in which a rubber body containing a liquid is mounted on a lower frame is disclosed in Japanese Utility Model Publication No. 4-32251. A device was devised, but according to this invention, when there is uneven density of raw material filling, where the raw material density is low, tiles become thinner when pressed and molded, and flat tiles cannot be made. When a pressure load is applied to the liquid, the flatness of the surface of the rubber body is impaired.

Also, in the tile forming apparatus disclosed in Japanese Utility Model Publication No. 4-32251, a rubber body is placed on a lower bridge forming a back foot groove of the tile. Since the surface of the natural rubber body is located, there is a drawback that the sole foot groove of the tile cannot be formed.

Further, the forming of curved tiles is more difficult than the general tile forming. For example, a curved tile has two flat portions, that is, a long portion and a bent portion, and the shape of the forming die is also changed from the top of the forming die. Two molding surfaces each having an inclination of 45 degrees were formed, and the material was filled on the top and the two molding surfaces.

Accordingly, when the raw material is filled into the inclined molding surface, even though the raw material can be filled substantially uniformly as a whole, some raw material particles flow downward from the top along the two molding surfaces.
As the density of the raw material at the top decreases and the density of the lower part increases, it has been even more difficult to achieve a uniform raw material density with the curved tile.

Further, in recent years, there has been a problem of a peeling accident of a tile applied to a wall surface, and irregularities on the back surface of the tile, that is, generally streak-like grooves have been further deepened as a measure for preventing peeling. The sole-foot groove is formed by a convex part in the molding die, but when the pressure molding is performed, the compression ratio of the part is larger than that of the other part, and therefore, a molding die in which the sole-foot groove is deepened is used. In this case, if there is unevenness in the filling of the raw materials, the variation in the molding density becomes large, and the shape after firing tends to be deteriorated.

[0012] Further, as shown in FIG. 12, an elastic body b in the form of an uneven plate is adhered to the surface of a tile back mold a as shown in FIG. Even if it has irregularities, the entire base is present, but as in the mold of the present application described later, the tile back mold a
When the elastic body b is bonded to the base, it is impossible to form the elastic body b by direct coating on the tile back mold a, and the elastic body b formed into a predetermined shape is bonded. It is assumed that the work must be performed and the work becomes difficult.

[0010]

DISCLOSURE OF THE INVENTION The present invention relates to a bent tile having a deep sole muscle, which is capable of forming a bent tile which is less likely to be deformed by firing shrinkage, and an opening in a tile back mold. It is an object of the present invention to provide a method of manufacturing a mold in which a thin elastic body is adhered by a direct coating operation on a surface of a tile back mold when the mold having the portion is manufactured.

[0011]

DISCLOSURE OF THE INVENTION The present invention has been made in consideration of the problem that it is difficult to form a deep sole groove at a uniform molding density based on the above-mentioned prior art. The surface is the same as a molding die whose surface is composed of a large number of uneven patterns, but the interior of the convex part is made up of many cavities, and all the cavities in the lower mold are communicated. In a watertight structure, the inside is filled with liquid, and a preload is applied with a weak pressure. The above object has been achieved in that the convex portion expands or contracts in accordance with the difference in pressure acting on the portion, so that the lower mold is compression-molded at a uniform pressure.

Further, in view of the problem that it is impossible to form an elastic body directly on the back of a tile having an opening based on the above-mentioned prior art, the upper and lower cavities perforated in the lower mold are stacked. The upper and lower fillers are loaded into the cavity, and the upper and lower fillers are sequentially drawn out from the lower cavity after coating the elastic body such as urethane rubber or synthetic resin into the cavity. Closes the opening of the cavity, and the upper and lower fillers contribute to the formation of unevenness of the elastic body,
The above object has been achieved by directly bonding an elastic body to a lower mold.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 is a press forming apparatus for a curved tile having two curved planes, which is used for a corner or a stair of a building according to the present invention. As shown in FIG. 1, the lower surfaces of the upper dies 2 and 2a vertically controlled by hydraulic pressure or the like are
The long and short inclined molding surfaces 3, 3a are formed, and the surface sides of the pair of tile bases T are successively molded by the molding surfaces 3, 3a of the upper dies 2, 2a.

At the lower position of the upper dies 2, 2a, on the back side of the tile base T, a tile back surface having molding surfaces 4, 4a formed in a predetermined inclined shape corresponding to the molding surfaces 3, 3a. Lower molds 5 and 5a (only one part is shown in the figure) are provided.

Reference numeral 6 denotes a mold frame provided with an upper end surface corresponding to a line connecting the vertexes of the pair of filled powdery raw materials W. The mold frame 6 surrounds the lower molds 5 and 5a. It is arranged to be able to move up and down by a cylinder (not shown), and the inner surface of the mold frame 6, the lower mold 5,
The molding surfaces 4 and 4a of 5a constitute a cavity 7 as a raw material filling space.

The work of filling the powder material W into the cavity 7 is performed by a material supply device (not shown) having a supply port having the same shape as the tile base T to be formed. If the raw material is filled in this state, the overall collapse does not occur due to the composition of the powder raw material W.

Next, the details of the lower dies 5 and 5a will be described. The surfaces of the longitudinal surfaces 8 and the bent surfaces 9 of the lower dies 5 and 5a corresponding to the bent portions of the bent two planes and the bent portion of the curved tile are described. , An elastic body 11 having uneven portions 10, 10a,..., And a plurality of parallel convex portions
Are provided, and a plurality of circular convex portions 13, 13a are formed on the elastic body 11 of the bent surface 9.

The convex portion provided on the elastic body 11 of the longitudinal surface 8
Are formed in a rectangular shape, but the convex portion 1 is formed on the tile base T to be formed so that a dovetail-shaped back foot groove can be formed.
May be formed in an inverted trapezoidal shape, and the convex portions 13, 13a... Provided on the elastic body 11 of the bent surface 9 are formed in a circular shape. The selection may be made according to the bottom foot groove of the tile base T to be formed.

The convex portions 12, 12a..., 13,
13a, corresponding to the longitudinal portions 14 and the bent portions 15 of the lower dies 5, 5a.
Are provided with cavities 16, 16a..., 17, 17a... Communicating with the interiors of the convex portions 12, 12a. Then, the cavity 1 of the longitudinal part 14
6, 16a...
Are indicated by broken-line circles.

Also, cavities 16, 16a..., 1 in lower dies 5, 5a
, 17a... Are vertically communicated with each other in layers, and the hollow portions 17, 17a.
And a through-opening is formed on the opposite side of the bent portion 15, and a screw portion is provided in the opening 18 so that the lid 18 a can be detached and opened only when the lower molds 5 and 5 a are manufactured. There is provided a communication hole 19 for connecting all of the plurality of lower cavities 17, 17a... Which are communicated with the upper cavities 16, 16a..., And an introduction hole 20 communicates with the communication hole 19.

The elastic members 11 provided on the surfaces of the longitudinal surfaces 8 and the bent surfaces 9 of the lower dies 5, 5a have substantially the same thickness, and the interior of the convex portions 12, 12a,. , 17, 17a... Are shown, but as shown in FIG. 5, the convex portions 12, 12a.
And the convex portions 12, 12a..., 1
May be formed in a protruding state. In this case, the hollow portions 16, 16a,..., 17 are formed on the lower surface of the elastic body 11 at the positions where the protruding portions 12, 12a. , 17a…
Position.

In the figure, reference numeral 21 denotes a molding machine base for the lower dies 5 and 5a. A mold base 21a mounted on the upper part of the molding machine base 21 communicates with the introduction hole 20 of the lower dies 5 and 5a. A through hole 22 is provided, and the upper dies 2 and 2a are mounted on a molding machine base plate 23.

FIG. 1 shows a pressure load device which is an accessory mechanism for the above-mentioned main part. Reference numeral 24 denotes a liquid-to-pneumatic converter incorporating a liquid 25, and connection of the liquid-to-pneumatic converter 24 to the liquid 25 side. Piping
26 is provided with a check valve 27 and a stop valve 28, while a hydraulic / pneumatic converter
A pressure control valve 30 and a pressure gauge 31 connected to an air pressure source 29 are connected to the air side of 24.

The distal end of the connection pipe 26 of the pressure load device is connected to all the hollow portions 16 through the through holes 22 provided in the mold base 21a, the introduction holes 20 and the communication holes 19 provided in the lower dies 5, 5a. 16a…,
17, 17a ... preload is applied to the liquid 25 contained in the upper mold 2,
When 2a pressurizes the powder raw material W filled in the cavity 7, the convex portions 12, 12a..., 13, 13a. The valve 27 is designed to catch it.

Next, the details of the main parts of the lower dies 5, 5a of the present invention will be described with reference to FIGS. 6, 7, and 8. The lower dies 5, 5a and the elastic body 11 are in close contact with each other as a whole. Elastic body 11
, 13, 13a ... are hollow parts 16, 16a
…, 17, 17a… are free to move up and down within the elastic limit, and liquid 25 is placed in the cavities 16, 16a…, 17, 17a…
In the figure, T indicates a tile body which is a compact formed by compressing the powder raw material W filled in the cavity 7.

In FIG. 9, the mold frame 6 and the lower mold 5,
FIG. 5 is a view for explaining a compression ratio when a powder raw material W filled in a cavity 7 composed of 5a or the like is compressed to form a tile base T which is a molded body. The dimension t represents the thickness of the tile base T, and the dimension h represents the height of the convex portions 12, 12a..., 13, 13a.

Next, the operation of the curved tile forming die according to the present invention will be described. As shown in FIGS. 1 and 4, the air pressure supplied from the air pressure source 29 is reduced to 0 to 2 kg by the pressure control valve 30.
When the liquid 25 is properly adjusted within the range of / cm ² and loaded on the upper part of the liquid-to-pneumatic converter 24, the liquid 25 passes through the connection pipe 26, the through hole 22, the introduction hole 20, the communication hole 19, and passes through the lower mold 5. Cavities 16, 16 in 5a
A pressure is applied to the liquid 25 filled in a, 17, 17a, so that the convex portions 12, 12a, 13, 13a of the elastic body 11 are formed.
Has a convex shape slightly expanded by receiving pressure from the lower part.

As shown in FIG. 8, the powder raw material W filled in the cavity 7 composed of the mold frame 6, the lower molds 5, 5a, etc.
When pressed by the upper dies 2 and 2a from above, it becomes a tile base T, and the lower elastic body 11 and its convex portions 12, 12a
, 13, 13a..., And at this time, a portion having high density in the tile substrate T, for example, the convex portion 12a on the left side in the figure
A strong pressure is generated in the tile base T at the top of the
An attempt is made to push down the convex part 12a of 11.

On the other hand, where the density of the tile base T is low,
For example, in the figure, the tile base T above the right convex portion 12b
In this case, the generated pressure is weak, the convex part 12b of the elastic body 11 can be pushed down only weakly, and a plurality of convex parts 12, 12a, 12
Since the upper cavities 16, 16a communicating with the inside b are communicated by the lower cavities 17, 17a and the communication holes 19, the pressure generated in the liquid 25 at all positions is represented by the principle of Pascal. And the same pressure.

Therefore, the liquid 25 at the place where the high pressure is generated
a is pushed down by the elastic deformation of the elastic body 11 and is sent to the low pressure cavities 16, 16 a.
b rises and pushes up the convex portion 12b of the elastic body 11 within the elastic limit to compress the tile base T from below.

As shown in the embodiment shown in FIG.
Even when no space is formed inside 12a, 13, 13a, the convex portions 12, 12a, 13, 13a are formed as compared with the case where the uneven portions 10, 10a are formed with substantially the same thickness. Although the elastic limit is reduced, the convex portions 12, 12a ..., 13, 13a ... are hollow.
16, 16a ..., 17, 17a ... affected by the pressure of the lower mold 5, 5a
And moves up and down with respect to the surfaces of the longitudinal surface 8 and the bent surface 9 of the same, and has the same pressure action.

Next, the pressurized state at each position of the elastic body 11 having the uneven portions 10, 10a... Will be described. As shown in FIG. 9, the powder raw material W has a pressing force of about 250 to 350 kg / cm ^2. , A tile base T formed to a thickness t of about half of the raw material filling depth d is obtained.

Now, suppose that the raw material filling depth d = 20, the thickness t of the tile base T = 10, and the convex portions 12, 12a..., 13, 13a.
When the height h is 2, the concave portion on the surface of the lower mold 5, 5a
, 13z, 13y..., The compression ratio of the tile substrate T is 20/10 = 2, and the convex portions 12, 12a
, 13, 13a, the compression ratio of the tile base T is (20
−2) / (10−2) = 18/8 = 2.25 The convex portions 12, 12a..., 13, 13a.

Since the tile raw material is a powder raw material W,
Although the principle of Pascal is not applied as shown in FIG. 25, as shown by arrows in FIGS. 8 and 9, a slight force acts not only in the vertical direction but also in the horizontal direction so that the convex portions 12, 12a. 13a ... from the part above, concave parts 12z, 12y ..., 13z, 13y ...
., 13y, 13y,..., The density of the tile base T is slightly improved.

Further, in the conventional molding dies shown in FIGS. 12 and 13, when the packing density of the powdery raw material is uneven, a portion having a low packing density has a higher compression density than a portion having a higher packing density. Is low for both the convex and concave portions, so that the force acting laterally from the convex portion to the concave portion is weaker at the lower density and the compression ratio of the concave portion is lower. It cannot be corrected so that a lateral force acts to approach a high density area.

Next, a method of manufacturing a bent tile forming die according to the present invention will be described. In the longitudinal surface 8 of the lower die 5, 5a, the upper cavities 16, 16a. In the bent surface 9, the lower cavities 17, 17a... Are opened, the opening 18 opposite to the bent portion 15 is opened, and a communication hole 19 and an introduction hole 20 are further formed. The lower mold 5, 5a is manufactured.

Then, all the lower cavities 17, 17a are filled with the lower fillings A, A1,.
are loaded from the front side or the opening 18 side, and the lower fillings A, A1... are projected from the bent surface 9 of the lower molds 5, 5a by a predetermined amount, and all the upper cavities 16, 16a. Filling B, B1
Are loaded from the longitudinal surfaces 8 of the lower dies 5, 5a, and the upper fillings B, B1... Are projected from the longitudinal surfaces 8 of the lower dies 5, 5a by a predetermined amount.

When the upper and lower fillings A, A1,..., B, B1,... Are loaded into the hollow portions 16, 16a,.
.., 13a... Of the elastic body 11, that is, the height h of the convex portions 12, 12a..., 13, 13a. And an elastic material such as rubber or synthetic resin is applied to the entire surface of the bent surface 9 and pressure is applied or heat-cured so that the lower filling A, A1.
The elastic body 11 is coated along the state where B1.

Although the upper and lower fillers A, A1,..., B, B1,... Have been described as projecting from the longitudinal surfaces 8 and the bent surfaces 9 of the lower dies 5, 5a, the embodiment shown in FIG. , A, A1,..., B, B1,...
13a may be formed in a protruding state.

Then, the lower fillings A, A1... Are pulled out from the openings 18 of the lower dies 5, 5a, and then the upper fillings B, B1. .., And is positioned in the lower cavities 17, 17a... From the upper cavities 16, 16a..., And the upper fillings B, B1. The lid 18a is attached to the opening 18 of the mold 5, 5a.

The upper and lower fillers A, A1,..., B, B1,... Are projected from the longitudinal surfaces 8 and the bent surfaces 9 of the lower dies 5, 5a by a predetermined amount to apply an elastic material. , B1, B1,... Protrude from the longitudinal surface 8 and the bent surface 9, apply a release agent to the entire surface (upper surface and side surfaces), and then apply an elastic material. The upper and lower fillers A, A1,..., B, B1,.
Can be easily pulled out from the lower molds 5, 5a.

[0042]

In short, the present invention is directed to a thin elastic body 11 having two surfaces, namely, a long surface 8 and a bent surface 9 of a lower mold 5 or 5a made of a metal, at least on the surface side.
And the convex portions 12, 12a..., 1 of the elastic body 11 on the two surfaces
Cavities 16, 16a in which the lower surfaces of 3, 13a ... are drilled in lower molds 5, 5a
, 17, 17a ... and the cavities 16, 16a ..., 17, 17a ... in the lower dies 5, 5a are all connected,
Liquid in the cavities 16, 16a…, 17, 17a… with a sealed structure
25, the convex portions 12, 12a, 13, 13 of the uneven portions 10, 10a,... Of the elastic body 11 on the surfaces of the lower molds 5, 5a.
The hollow portions 16, 16a, 17, 17a, which are in contact with the lower surface of the liquid a are filled with a liquid 25, and the upper convex portions 12, 12a, 13, 13, 13a of the liquid 25 Powder material W in molds 2 and 2a
When pressurizing, simultaneously pressurized and convex portions 12, 12a
, 13, 13a are evenly pressurized by the pressure generated in the liquid 25 by the reaction.

Accordingly, when there is density unevenness in the filled powder raw material W, the convex portion 12a near the high density powder raw material W
, 13a are pressed, and the convex portions 12b, 13b in the vicinity of the low-density powder raw material W press the powder raw material W conversely under uniform hydrostatic pressure.
.., 13, 13a... Can be compression-molded under a substantially uniform density at positions near the convex portions 12, 12a.

As described above, the convex portions 12, 12a..., 1
Since the compressed density at the upper part of 3, 13a ... becomes almost uniform, the concave part 12z from the upper part of the convex part 12, 12a ..., 13, 13a ...
, 12y..., 13z, 13y..., The laterally acting pressure on the tile body T becomes uniform, so that the concave portions 12z, 12y.
Since a horizontal pressure is applied to the powder raw material W above 13z, 13y... In the same manner as where the density is high, a tile base T having a substantially uniform density can be obtained.

Since the convex portions 12, 12a..., 13, 13a... Slightly move up and down in accordance with the packing density of the powdery raw material W, the groove portions of the tile base T corresponding to the sole foot grooves of the curved tiles Even if the depth is not constant and varies, the concave part
Tile base T formed by 12z, 12y ..., 13z, 13y ...
Since the thickness t of the tile base is constant, a good-quality bent tile with very little deformation can be obtained by firing the tile base T.

Also, the lower surfaces of the convex portions 12, 12a,..., 13, 13a of the elastic body 11 adhered to the longitudinal surface 8 and the bent surface 9 of the lower molds 5, 5a are hollow portions 16, 16a, 17, 17a. The same pressure acts through the adjacent convex portions 12, 12a,.
The functions and effects of 13, 13a are hollow portions 16 and 16a of the longitudinal surface 8.
.. And the longitudinal relationship of the refraction surface 9, that is, the uniformity of the density at the bent portion, the inclined longitudinal portion, and the bent portion of the tile base T is achieved. Also, since pressure is applied to the bent tile in the lateral direction in the direction of the bent portion, the fired state of the bent portion can be made better than before.

The convex portions 12, 12a..., 13,
13a... Constitute a space, and the space and the cavity 16,
, 17, and 17a are communicated with each other, so that the convex portions 12, 12a..., 13, 13a... Of the elastic body 11 having substantially the same thickness and thinness have an increased elastic limit, and the convex portions 12, 12a. , 13a... With respect to the longitudinal surface 8 and the bent surface 9 and the degree of expansion can be increased, and therefore, the degree of achieving uniform compression density can be increased.

Also, since the pressure loading device for the liquid 25 in the cavities 16, 16a,..., 17, 17a.
6, 16a…, 17, 17a… by applying pressurization, high pressure compression molding, and convex parts 12, 12a…,
By maintaining the shapes of 13, 13a,..., The groove portion of the tile base T can be reliably formed.

The upper and lower cavity portions 1 whose main bodies are located vertically at the longitudinal portion 14 and the bent portion 15 of the metal lower molds 5 and 5a.
, 17, 17a... Are respectively formed, and the upper and lower cavities 16, 16a..., 17, 17a. The lower cavity 17, 17a,... Is provided with an opening 18 on the opposite surface of the bent surface 9 and the lower cavity 1, 1
6, 16a ..., 17, 17a ... are connected in the same direction,
Since the lower dies 5, 5a in which the lower cavities 17, 17a... Are communicated with each other through the communication holes 19 are manufactured, uniform pressure can be applied by hydrostatic pressure when pressure is applied to two planes.

The upper and lower cavities 16, 16a..., 17, 17a
, Are filled with upper and lower fillings A, A1,..., B, B1, respectively, and a thin elastic body 11 is adhered to the longitudinal surface 8 and the bent surface 9 of the lower molds 5, 5a. .., B, B1... And the uneven portions 10, 10a... Formed on the elastic body 11, so that when the elastic body 11 is bonded to the lower molds 5, 5a, It can be directly coated and can be easily bonded.

Also, the lower fillings A, A1,... Are withdrawn from the opening 18, the upper fillings B, B1... Are dropped into the lower hollow portions 17, 17a, and then the upper fillings B, B1,. Since the upper and lower fillers A, A1,..., B, B1... Required for the bonding work of the elastic body 11 are drawn out, the hollow portions 16, 16a.
..., the hollow portions 16, 16a, ..., 17, 17a ... become transmission paths for imparting hydrostatic pressure. Therefore, it is not necessary to separately perform unnecessary work during compression molding for bonding the elastic body 11. .

The upper and lower cavities 16, 16a..., 17, 17a
When loading the upper and lower fillings A, A1,..., B, B1.
Since the upper and lower fillings A, A1,..., B, B1... Slightly protrude from the surface of the lower molds 5, 5a, the length of the lower fillings A, A1. By changing, the convex portion 1 in the uneven portion 10, 10a... Of the manufactured elastic body 11
, 13, 13a ... can be freely set, and when the elastic body 11 is formed, the upper and lower paddings A, A1
, B, B1,... Are bonded to the surfaces of the lower molds 5, 5a so as to form the uneven portions 10, 10a on the elastic body 11, so that the convex portions 12, 12a of the elastic body 11 are formed. …, 13, 13a… and the cavities 16, 16a…, 17, 17a…
The practical effects thereof are extremely large, for example, it is possible to improve the bonding work and the bonding state between the two.

[Brief description of the drawings]

FIG. 1 is a partial sectional view of a press forming apparatus using a bent tile forming die according to the present invention.

FIG. 2 is a plan view of a lower die.

FIG. 3 is a sectional view of a lower mold.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is another embodiment of FIG.

FIG. 6 is an enlarged sectional view of a main part of a lower mold.

FIG. 7 is an enlarged sectional view of a main part of a lower mold in a state where the liquid is filled.

FIG. 8 is an enlarged cross-sectional view of a main part of a lower mold showing a compression molding state.

FIG. 9 is an explanatory diagram of a compression ratio.

FIG. 10 is a sectional view showing a state in which the lower mold is manufactured.

11 is a sectional view taken along the line BB of FIG. 10;

FIG. 12 is a partial cross-sectional view of a conventional molding portion for forming a tile back foot groove.

FIG. 13 is a partial cross-sectional view of a molded part having another pattern according to the third embodiment.

[Explanation of symbols]

 5, 5a Lower die 8 Longitudinal surface 9 Bending surface 10, 10a… Uneven part 11 Elastic body 12, 12a… Convex part 13, 13a… Convex part 14 Long part 15 Bent part 16, 16a… Hollow part 17, 17a… Cavity 18 Opening 19 Communication hole 25 Liquid A, A1 ... Filling down B, B1 ... Filling up

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B28B 7/00 B28B 3/00 102 B28B 7/16 C04B 33/20

Claims (5)

(57) [Claims] 1. A thin elastic body having an uneven portion on at least the surface side is adhered to two surfaces of a longitudinal surface and a bent surface of a lower mold made of a metal, and a lower surface of a convex portion of the elastic body on the two surfaces is bonded. A curved tile forming mold characterized by being in contact with the cavity formed in the lower mold, making all the cavities in the lower mold communicate with each other, forming a sealed structure, and filling the cavity with liquid. . 2. The curved-tile molding die according to claim 1, wherein a space is formed inside the convex portion of the elastic body, and the space communicates with the cavity. 3. The bent-tile molding die according to claim 1, wherein a pressure loading device for the liquid in the cavity is provided in series. 4. An upper and lower cavity portion whose main body is vertically located in a longitudinal portion and a bent portion of a metal lower mold, respectively.
The upper and lower cavities are respectively opened on the surfaces of the longitudinal surface and the bent surface, and the lower cavity is provided with an opening on the surface opposite to the bent surface, and the upper and lower cavities are communicated in the same direction. After the lower mold is manufactured with the lower cavity communicating with the communication hole, the upper and lower fillers are loaded into the upper and lower cavity, respectively, and then the elastic body is bent to the longitudinal surface of the lower mold and bent. Adhering to the surface, making contact with the surface of the upper and lower filling, and forming an uneven portion on the elastic body, pulling out the lower filling from the opening, dropping the upper filling into the lower cavity, and then upward from the opening A method for manufacturing a bent tile forming die, characterized in that a filling material is pulled out. 5. When the upper and lower fillers are loaded into the upper and lower cavities, the upper and lower fillers slightly protrude from the surface of the lower die, and when the elastic body is formed, the upper and lower fillers come into contact with the surface of the upper and lower fillers to form the lower die. 5. The method according to claim 4, wherein the elastic body is formed with an uneven portion by adhering to the surface.