JP2904721B2 - 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 for curved tiles in which a tile material composed of powder is filled in a mold and compression-molded, and the fired curved tiles have a top strength and an accurate shape. The present invention relates to a method for manufacturing a mold for curved tiles, and a method for manufacturing a mold for curved tiles, which employs a simple manufacturing method for manufacturing 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.
Since the raw material filling density at the top decreases and the density at the lower part increases, it is even more difficult to achieve a uniform raw material filling density with curved tiles. It had disadvantages that occurred.

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.

Further, as shown in FIG. 13, an elastic body b having an irregular plate shape 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 shrinkage due to firing or cracked at the top. And a method of manufacturing a mold in which a thin elastic body is bonded by direct coating work on the surface of the tile back mold when manufacturing the mold having an opening in the tile back mold. is there.

[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 and a weak top with a uniform molding density based on the above-mentioned prior art. In contrast to a mold having a long surface and a bent surface formed with a large number of concave and convex patterns for forming, a concave and convex pattern is also formed on the top surface, and the inside of the convex portion is formed with a large number of hollow portions. And
Moreover, by communicating all the cavities in the lower mold, sealing it in a water-tight structure, filling the inside with liquid, and applying a pre-press with a weak pressure, it is possible to perform compression molding by pressing the upper mold. The above problem is solved by uniformly compressing the lower mold with a uniform pressure by expanding or contracting the convex portion according to the difference in pressure acting on the convex portion with respect to the variation in the packing density of the powder raw material. It was something we did not solve.

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. At the same time, the cavity is filled with an integral upper and lower filling, and the top cavity is filled with a top filling of powdered material (heat-resistant substance) and coated with an elastic material such as urethane rubber or synthetic resin. After that, the upper and lower fillings are sequentially pulled out from the lower cavity, and liquid (water) is applied to the top filling to separate and remove the granular material (substance). Solves the above-mentioned problem by closing the opening of the cavity, and by filling the upper and lower fillers and the top fillers to form the uneven portion of the elastic body and directly bonding the elastic body to the lower mold. It's a neat thing.

[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 molds 5 and 5a will be described. The bent two-plane longitudinal portion of the curved tile, the short bent portion bent 90 degrees from the long portion, and the top portion between the long portion and the bent portion. Corresponding to the longitudinal faces 8 of the lower molds 5 and 5a, respectively.
The surfaces of the bent surface 8a and the top surface 9 are covered with an elastic body 11 having irregularities 10, 10a..., And the elastic body 11 of the longitudinal surface 8 is provided with a plurality of parallel convex portions 12, 12a. Provided on the elastic body 11 of the bent surface 8a are formed a plurality of circular convex portions 13, 13a,.
A plurality of convex portions 14, 14a are also formed on the elastic body 11 on the top 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 have an inverted trapezoidal shape, and the convex portions 13, 13a... Provided on the elastic body 11 of the bending surface 8a have a circular shape, but similarly have a rectangular shape and an inverted trapezoidal shape. May be formed, and the top surface 9
The shape of the convex portions 14, 14a provided on the elastic body 11 is 2
Although this series is illustrated, the shape can be selected as appropriate, that is, the shape is selected according to the sole foot groove of the tile base T to be formed.

An elastic body provided on the longitudinal surface 8 and the bent surface 8a
.., 13, 13a,... Corresponding to the convex portions 12, 12a.
…, 13,13a… Cavities 16,16a…, 1 communicating with the inside of
7, 17a... Are provided, and as shown in FIG.
In the plan view of FIG. 3, the cavities 16, 16a... Of the longitudinal portion 15 are shown by dashed ellipses, and the cavities 17, 17a.
Is shown by a broken circle.

Also, cavities 16, 16a..., 1 in lower dies 5, 5a
7, 17a ... are vertically communicated in layers, and the cavity 17, 17a ... located below is a bent surface which is the surface of the bent portion 15a.
8a and a through-opening on the opposite side of the bent portion 15a. A screw portion is provided in the opening 18 to make the lid 18a detachable. The opening 18 is opened only when the lower dies 5, 5a are manufactured. Also, there is provided a communication hole 19 for connecting all 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 convex portion 1 of the elastic body 11 provided on the top surface 9
In correspondence with 4, 14a, the top 21 of the lower mold 5, 5a has a convex portion 1
Cavities 22, 22a communicating with the insides of the lower dies 5, 5a are provided as shown in FIG.
The hollow portions 22 and 22a are indicated by dashed ellipses.

The lower portion of each of the cavities 22, 22a communicating with the convex portions 14, 14a of the top surface 9 has a longitudinal surface 8 and a bent surface 8a.
Are provided with connecting cavities 23, 23a ... communicating with the cavities 16, 16a ..., 17, 17a ...
Three connecting cavities 23 for each of the cavities 22 and 22a,
23a ..., but the cavities 22, 22a and the connection cavities 23, 23a ... are one-to-one correspondences, or all the connection cavities 23, 22 23a ... may be connected.

The elastic members 11 provided on the surfaces of the longitudinal surface 8, the bent surface 8a and the top surface 9 of the lower dies 5, 5a have substantially the same thickness, and have convex portions 12, 12a, 13, 13a. , 14, 14a are defined as spaces and the cavities 16, 16a…, 17, 17a…, 22, 22
a and the connecting cavities 23, 23a... are shown, but as shown in FIG. 5, the convex portions 12, 12a.
, 14, 14a are made flat and the convex part 1
, 13, 13a ..., 14, 14a may be formed in a protruding state. In this case, the convex portions 12, 12a ..., 13, 13
, 17, 17a..., 22, 22a are located on the lower surface of the elastic body 11 at the positions where the protrusions a,.

In the figure, reference numeral 31 denotes a molding machine base for the lower dies 5 and 5a. A mold base 31a mounted on the upper part of the molding machine base 31 communicates with the introduction hole 20 of the lower dies 5 and 5a. A through hole 32 is provided, and the upper dies 2 and 2a are attached to a molding machine base 33.

FIG. 1 shows a pressure load device as an accessory mechanism for the above-mentioned main part. Numeral 34 denotes a liquid-to-pneumatic converter incorporating a liquid 35, and connection of the liquid-to-pneumatic converter 34 to the liquid 35 side. Piping
36 is provided with a check valve 37 and a stop valve 38, while the hydraulic / pneumatic converter
A pressure control valve 40 and a pressure gauge 41 connected to a pneumatic pressure source 39 are connected to the air side of 34.

The distal end of the connection pipe 36 of the pressure load device is connected to all the hollow portions 16 through the through holes 32 provided in the mold base 31a, the introduction holes 20 and the communication holes 19 provided in the lower dies 5, 5a. 16a…,
, 22, 22a and the liquid 35 contained in the connecting cavities 23, 23a...
, 13, 13a..., 14, 14a of the elastic body 11 are pressed when the powder raw material W filled in the container is pressurized, and the high liquid pressure generated in the liquid 35 in the inside is stopped. The valve 37 is designed to catch it.

Next, the details of the main parts of the lower dies 5, 5a according to the present invention will be described with reference to FIGS. 7, 8, and 9. The lower dies 5, 5a and the elastic body 11 are in close contact with each other as a whole. Elastic body 11
, 12, 13a…, 13, 13a…, 14, 14a are hollow
16, 16a…, 17, 17a…, 22, 22a and are free to move up and down within the elastic limit, and the cavities 16, 16a…,
Liquid in 17, 17a ..., 22, 22a and connecting cavities 23, 23a ...
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. 10, the powder raw material W filled in the cavity 7 formed by the mold frame 6 and the lower molds 5, 5a, etc. is compressed to form a tile body T as a compact. In the figure, the dimension d is the raw material filling depth, the dimension t is the thickness of the tile base T, and the dimension h is the elastic body 11.
, 13, 13a..., 14, 14a.

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 pneumatic source 39 is reduced to 0 to 2 kg by the pressure control valve 40.
When properly adjusted within the range of / cm ² and loaded on the upper part of the liquid-to-pneumatic converter 34, the liquid 35 passes through the connection pipe 36, the through hole 32, the introduction hole 20, the communication hole 19, and passes through the lower mold 5. Cavities 16, 16 in 5a
a…, 17, 17a…, 22, 22a and connecting cavities 23, 23a…
By applying pressure to the liquid 35 filled with
, 13, 13a..., 14, 14a have a convex shape slightly expanded by receiving pressure from below.

As shown in FIG. 9, the powder raw material W filled in the cavity 7 composed of the mold frame 6 and 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..., 14, 14a. At this time, a strong pressure is generated in a high density place in the tile base T, for example, the tile base T above the left convex portion 12a in the figure. Then, the convex portion 12a of the elastic body 11 is pushed down.

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 35 at all positions is represented by the principle of Pascal. And the same pressure.

Therefore, the liquid 35 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, 16a.
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.

The operation of the liquid 35 on the convex portion has been described for the convex portions 12, 12a... Provided on the longitudinal surface 8, but the convex portions 13, 13a. The same is true for the convex portions 14 and 14a provided in the above.

Also, as in the embodiment shown in FIG.
, 13, 13a..., 14, 14a also have convex portions 12, 12a,..., 13 as compared with those having uneven portions 10, 10a. , 13a…,
Although the elastic limit of 14 and 14a decreases, the convex portions 12 and 12a
..., 13, 13a ..., 14, 14a are hollow parts 16, 16a ..., 17, 17
a,..., 22a and the connecting cavities 23, 23a... are moved up and down with respect to the surfaces of the longitudinal surface 8, the bent surface 8a and the top surface 9 of the lower dies 5, 5a, and the same pressure is applied. Has.

Next, the pressurized state at each position of the elastic body 11 having the concave and convex portions 10, 10a.
As shown in the figure, when the powder raw material W is compressed at a pressure of about 250 to 350 kg / cm ^2, it becomes a tile base T formed to have a thickness t of about half of the raw material filling depth d.

Now, suppose that the raw material filling depth d = 20, the thickness t of the tile base T = 10, the convex portions 12, 12a..., 13, 13a.
, 14, 14a, when the height h is 2, concave portions 12z, 12y, 13z, 13y, 14z, 14y on the surfaces of the lower molds 5, 5a.
, The compression ratio of the tile base T in the convex portions 12, 12a..., 13, 13a..., 14, 14a is (20−2) / (10−). 2) = 18/8 = 2.25, and the convex portions 12, 12a ...,
13, 13a ..., 14, 14a are compressed more strongly.

Since the tile raw material is a powder raw material W,
Although the principle of Pascal is not applied as in 35, a slight force acts not only in the vertical direction but also in the horizontal direction as shown by arrows in FIGS. 9 and 10, and the convex portions 12, 12a. 13a
…, 14, 14a to the concave portions 12z, 12y
.., 13z, 13y,..., 14z, 14y.
, 13z, 13y, 14z, 14y, etc., the density of the tile base T is slightly improved.

Further, in the conventional molding dies shown in FIGS. 13 and 14, when the packing density of the powder raw material is uneven, a portion having a low packing density has a higher compression density than a portion having a higher 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 dies 5, 5a, the upper cavities 16, 16a are opened and the lower dies 5, 5a are opened. , The lower cavities 17, 17a,... Are open, and the cavities 22,
22a and the connecting cavities 23, 23a... Are opened, and the opening 18 opposite to the bent portion 15a is opened.
Further, the lower dies 5, 5a having the communication hole 19 and the introduction hole 20 are manufactured.

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

[0041] Also, all the cavities 22,22a and the connecting cavity 23, 23a ..., the top surface of the lower mold 5,5a top <br/> portion padding C, C1 ... made freely separated by the action of the liquid 9 and the top fillings C, C1,... Project from the top surface 9 of the lower dies 5, 5a by a predetermined amount.

The following conditions are required for the material of the top fillings C, C1...
When coating on the upper surface of the metal part, the metal part is kept at 100 ° C. to 1 ° C. to completely adhere the elastic body 11 to the metal part.
Need to be heated to 20 ° C., so that the top fillings C, C1...
After loading into the connecting cavities 22a and the connecting cavities 23 , 23a, it is necessary that the top fillings C, C1,... Can be easily discharged , that is, separated by the action of liquid .

As a result of various experiments under the above conditions, as an example, a paste obtained by kneading feldspar fine powder and clay with a liquid such as CMC (sodium cellulose glycolate, sodium cellulose glycolate or carboxymethyl cellulose) and water was used. When the paste is molded and dried and solidified, it is almost satisfactory in terms of moldability, strength required for coating the elastic body 11, heat resistance, dimensional change, and solubility. Things were obtained.

Although the above embodiment has been described as a material for the top fillings C, C1,..., The feldspar fine powder may be any other substance as long as it is a water-insoluble powder, for example, fine powder of various ceramic materials,
Powders and granules are possible, that is, while being heat resistant ,
As long as the material is not deteriorated by a binder or the like, powders (substances) of any material such as metal and nonmetal can be used. Also various powders
The binder or glue material that solidifies (substance) is not limited to CMC, but is a water-soluble binder (which has solubility by the action of liquid).
If ) , other substances can be used.

As described above, the cavities 16, 16a..., 17, 17a
, 22, 22a and the connecting cavities 23, 23a, the upper and lower fillers A, A1,..., B, B1 and the top fillers C, C1,. , Ie, convex portions 12, 12a ..., 13, 13a ..., 14, 14a
Of the lower die 5, 5a, and apply an elastic material such as rubber or synthetic resin to the entire surface of the longitudinal surface 8, the bent surface 8a and the top surface 9 of the lower dies 5, 5a, and apply pressure, The upper and lower fillings A, A1,..., B, B1... And the top fillings C, C1.

The upper and lower fillings A, A1,..., B, B1... And the top fillings C, C1... Are projected from the longitudinal surface 8, the bent surface 8a, and the top surface 9 of the lower dies 5, 5a. As described above, in the case of the embodiment shown in FIG. 5, the thickness of the elastic body 11 at the upper portion of the upper and lower fillings A, A1,..., B, B1,. Convex parts 12, 12a…, 13, 13
a ..., 14, 14a may be formed in a protruding state.

.. Are pulled out from the openings 18 of the lower dies 5, 5a by pressing down the convex portions 13, 13a... Of the elastic body 11, and thereafter, the upper fillings B, B1. Are pressed down on the convex portions 12, 12a... Of the elastic body 11 to be positioned in the lower cavities 17, 17a... From the upper cavities 16, 16a. Upper part B, B1 from part 18
… Also pull out.

[0048] The cavity 22,22a and the connecting cavity 23, 23a ... are incorporated in the granular material relative to the top filling and solidifying (substance) C, C1 ..., opening 1 of the lower mold 5,5a
8, by injecting a liquid such as water through the cavities 16, 16a, 17, 17a, etc., the injected water dissolves the binder, etc. of the top fillings C, C1,. Are softened and separated into individual powders (substances), and are discharged from the openings 18 of the lower dies 5, 5a together with the drainage of the injection water, and the cavities 16, 16a, 17, 17a,.
Are hollowed out, and finally the lid 18a is attached to the opening 18 of the lower mold 5, 5a.

The upper and lower paddings A, A1,..., B, B1 from the longitudinal faces 8, the bent faces 8a and the top faces 9 of the lower dies 5, 5a.
, And the solidified top fillings C, C1... Are protruded by a predetermined amount to apply the elastic material.
..., B, B1 ... and top fillings C, C1 ... are longitudinal faces 8, bent faces
After the release agent is applied to the entire surface (upper surface and side surface) of the portion protruding from the top surface 9a, the elastic material is applied.
..., B, B1 ... and top fillings C, C1 ... and the elastic material do not adhere to each other, so that upper and lower fillings A, A1 ..., B, B1 ... and top fillings C, C1 ... can be easily removed from the lower molds 5, 5a. It has the effect that it can be pulled out and discharged.

The cavities 22, 22a and the connecting cavity 2
When filling the top fillings C, C1,... Into the tops 3, 23a.
2a and the connecting cavities 23, 23a.
It may be cured, or using other molds, water
Filling (soluble by the action of liquid) top filling C, C1
May be fitted after being dried and solidified, and the cavities 22, 22a and the connecting cavities 23, 23a, can be formed separately or integrally.

In the above embodiment, the cavities 16, 16a
..., 17, 17a ... are metal upper and lower fillings A, A1
, B, B1,..., And the tops C, C1,... Of the particulate form are loaded into the cavities 22, 22a and the connecting cavities 23, 23a. …, 17, 17a…
, A1, A1, ..., B, B1 ... to be charged into the powdery and granular material are also formed into cavities 16, 16a ..., 17, 17a ..., 22, with water.
The upper and lower fillers A, A1,..., B, B1... And the top fillers C, C1,.

[0052]

In short, the present invention is a thin type having a lower surface 5, 5a made of metal and having irregularities 10, 10a... At least on the three surfaces of a longitudinal surface 8, a bent surface 8a and a top surface 9 at least on the surface side. The elastic body 11 is adhered, and the convex portions 12, 12 of the elastic body 11 on the three surfaces are bonded.
a,.., 13, 13a..., 14, 14a so that the lower surfaces thereof are in contact with the hollow portions 16, 16a..., 17, 17a..., 22, 22a and the connecting hollow portions 23, 23a. , 17, 17a..., 22, 22a and connecting cavities in the lower molds 5, 5a
23 and 23a are all connected to each other, and are formed in a sealed structure to fill the cavities 16, 16a ..., 17, 17a ..., 22, 22a and the connecting cavities 23, 23a ... with the liquid 35. , 5a, the convex portions of the uneven portions 10, 10a... Of the elastic body 11
The hollow portions 16, 16a, 17, 17a, 22, 22a in contact with the lower surfaces of 12, 12a, 13, 13a, 14, 14a are filled with a liquid 35, and the upper portion of the liquid 35 Convex parts 12, 12a…,
, 14, 14a are simultaneously pressed when the powder material W is pressed by the upper mold 2, 2a, and the convex portions 12, 12a,.
13, 13a…, 14, 14a Liquid 35
The pressure is evenly applied by the pressure generated in.

Therefore, when there is density unevenness in the filled powder raw material W, or when density unevenness of the powder raw material W filled in the longitudinal surface 8, the bent surface 8a and the top surface 9 is high, The convex portions 12a, 13a, and 14a near the powder raw material W are pressed, and the convex portions 12b, 13b, and 13 near the low-density powder raw material W are pressed.
14b presses the powder raw material W in reverse with uniform hydrostatic pressure, and as a result, the tile base T becomes the convex portion 12 of the elastic body 11,
, 13, 13a..., 14, 14a Near the positions, compression molding can be performed under a substantially uniform density.

As described above, the convex portions 12, 12a...
Since the compression densities at the upper portions of 3, 13a..., 14, 14a are almost uniform, the concave portions 12z, 12y..., 13z, 13y from the upper portions of the convex portions 12, 12a. …, 14z,
The pressure acting in the lateral direction on the tile body T on the upper part of 14y is uniform, and therefore, the concave portions 12z, 12y..., 13z, 13y.
Since a lateral pressure is applied to the powder raw material W above z, 14y... in the same manner as where the density is high, a tile base T having a substantially uniform density can be obtained. Long surface 8, bent surface 8a and top surface 9 generated during filling
Regarding the density unevenness between them, the density of the tile substrate T formed on the top surface 9 can be increased by the pressure increase on the top surface 9 to improve the strength.

Also, the convex portions 12, 12a ..., 13, 13a ..., 1
4 and 14a slightly move up and down according to the packing density of the powder raw material W, so that the tile base T corresponding to the sole foot groove of the bent tile is used.
The groove portions of the concave portions are not constant in depth, and even if there are variations, the concave portions 12z, 12y ..., 13z, 13y ..., 14z, 14y
Since the thickness t of the tile base T formed by... Is constant, if the tile base T is fired, a good-quality bent tile with extremely little deformation can be obtained.

The convex portions 12, 12a,..., 13, of the elastic body 11 adhered to the longitudinal surface 8, the bent surface 8a and the top surface 9 of the lower molds 5, 5a.
The lower surfaces of 13a…, 14, 14a are hollow portions 16, 16a…, 17, 17a
, 22, 22a and the connecting cavities 23, 23a, etc., the same pressure acts on the adjacent convex portions 12, 12a.
.., 13, 13a..., 14, 14a function and effect the cavities 16, 16a... Of the longitudinal surface 8, the cavities 17, 17a.
This also occurs in the relationship between the hollow portions 22 and 22a and the relationship in the respective longitudinal directions, that is, the density can be made uniform in the vertical and horizontal directions and all positions of the tile base T.

The convex portions 12, 12a..., 13,
, 14, and 14a form a space, and the space communicates with the cavities 16, 16a, 17, 17, 17a, 22, 22a and the connecting cavities 23, 23a. Thin elastic body
11, 12a ..., 13, 13a ..., 14, 14a in 11
Has increased elastic limit, and the convex portions 12, 12a ..., 13, 13a
.., 14 and 14a with respect to the longitudinal surface 8, the bent surface 8a and the top surface 9 and the degree of expansion can be increased, so that the degree of achieving uniform compression density can be increased.

The cavities 16, 16a..., 17, 17a.
Since the pressure loading device for the liquid 35 in the connecting cavities 22a and the connecting cavities 23, 23a... Is connected, the cavities 16, 16a.
a,..., 22, 22a and the connecting cavities 23, 23a... by pressurizing to form the compression molding at a high pressure and the shape of the convex portions 12, 12a..., 13, 13a. By holding, the groove portion of the tile base T can be reliably formed.

Upper and lower cavities whose main bodies are located vertically at the longitudinal portion 15 and the bent portion 15a of the metal lower molds 5, 5a.
, 17, 17a ... are respectively formed, and the upper and lower cavities 16, 16a ..., 17, 17a ... are respectively opened in the surfaces of the longitudinal surface 8 and the bent surface 8a. The hollow portions 22 and 22a are formed in the top portion 21 of 5a, and the hollow portions 22 and 22a of the top portion 21 are formed.
Is opened on the surface of the top surface 9 so that pressure can be applied to the two curved planes and the top surface 9, and the lower cavity 17,
17a are provided with openings 18 on the opposite surface of the bent surface 8a, and the cavities 16, 16a ..., 17, 17a ... on the upper and lower sides of the longitudinal surface communicate in the same direction, and all the cavities 16, 16a …, 17, 17
a, ..., 22, 22a and the connecting cavities 23, 23a ... are made to communicate with each other, so that when applying pressure to the two planes and the top surface 9, equal pressure is applied by hydrostatic pressure. Can be done.

The upper and lower cavities 16, 16a,.
, B1, 7, and 17a.
B1..., Respectively, and the hollow portion 22 of the top portion 21,
22a are filled with top fillings C, C1,... Having heat resistance and solubility by the action of a liquid, and the thin elastic body 11 is placed in the lower molds 5, 5,
a, A1,..., B, B1... and top and bottom fillings C, C1. , 10a,..., The elastic body 11 is
When bonding to the lower mold 5a, the lower mold 5, 5a can be directly coated, and the bonding operation can be easily performed.

Also, the lower fillings A, A1... Are withdrawn from the opening 18 and the upper fillings B, B1.
7a ..., and then the upper fillings B, B
Are drawn out and liquid is injected from the opening 18 to dissolve and discharge the top fillings C, C1..., So that the upper and lower fillings A, A1,.
B, B1... And top fillings C, C1.
a, 17, 17a, 22, 22a and connecting cavity 2
3, 23a..., And 17a... 22, 22a and the connecting cavities 23, 23a. 11 for adhesion, it is not necessary to perform unnecessary work during compression molding, and large cavities 16,1
, 17, 17a... Can be performed smoothly because they are integrally formed.

The lower, upper and lower cavities 16, 16a..., 17, 17a.
2a, and the upper and lower cavities 16, 1
, 17, 17a..., 22 and 22a are respectively opened on the surfaces of the longitudinal surface 8, the bent surface 8a and the top surface 9, and the lower cavity portions 17, 17a. , 16, 17a ..., 17, 17a ..., 22, 22
The lower molds 5 and 5a are manufactured in a communicating state, and the upper and lower cavities 16, 16a..., 17, 17a.
<br/> filler A having a solubility by the action of heat and liquid within 2,22a, A1 ..., B, B1 ..., C, C1 ... after each loaded, longitudinal surface of the lower die elastic member 11 8, while being adhered to the bending surface 8a and the top surface 9, the upper and lower top fillings A, A1,.
, C, C1,... Are formed on the elastic body 11, and irregularities 10, 10a... Are formed, and liquid is injected from the opening 18 to fill the upper and lower top fillings A, A1,. B1
, C, C1 are dissolved and discharged, so that all the cavities 16, 16a, 17, 17a, 22, 22
a and the connecting cavities 23, 23a... can be performed in the same work mode, and work efficiency such as setup can be improved.

The cavities 16, 16a,...
Top and bottom top fillings A, A1,.
When loading B, B1 ..., C, C1 ..., the upper and lower top fillings A, A1 ..., B, B1 ..., C, C1 ... slightly protrude from the surface of the lower molds 5, 5a. , A1..., And the height of the upper fillings B, B1... And the top fillings C, C1.
, 13, 13a ..., 14, 14a
Can be set freely, and when the elastic body 11 is formed, upper and lower top fillings A, A1,..., B, B1,.
The elastic body 11 is adhered to the surface of the lower molds 5 and 5a in contact with the surface of.
Since the uneven portions 10, 10a,...
, 12, 13a…, 13, 13a…, 14, 14a and the cavity
, 17, 17a..., 22, 22a have the same positional relationship, and therefore, the practical effects thereof are extremely large, for example, the bonding operation and the bonding state of the two can be improved.

[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 a sectional view taken along the line BB of FIG. 2;

FIG. 7 is an enlarged sectional view of a main part of a lower mold.

FIG. 8 is an enlarged sectional view of a main part of a lower mold in a state where the liquid is filled.

FIG. 9 is an enlarged cross-sectional view of a main part of a lower mold showing a compression molding state.

FIG. 10 is an explanatory diagram of a compression ratio.

FIG. 11 is a sectional view showing a state in which the lower die is manufactured.

FIG. 12 is a sectional view taken along line CC of FIG. 11;

FIG. 13 is a partial cross-sectional view of a conventional molding portion for forming a tile back foot groove.

FIG. 14 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 Long surface 8a Bending surface 9 Top surface 10, 10a ... Uneven part 11 Elastic body 12, 12a ... Convex part 13, 13a ... Convex part 14, 14a Convex part 15 Long part 15a Bend 16 , 16a ... cavity 17, 17a ... cavity 18 opening 19 communication hole 21 top 22, 22a cavity 23, 23a ... connection cavity 35 liquid A, A1: lower filling B, B1 ... upper filling C, C1 ... top Filling

Continuation of the front page (56) References JP-A-49-118705 (JP, A) JP-A-2-169204 (JP, A) JP-A-8-127011 (JP, A) JP-A-8-80517 (JP) JP-A 8-108417 (JP, A) JP-A 7-232315 (JP, A) JP-A 8-197525 (JP, A) JP-A 8-108418 (JP, A) 5-13705 (JP, U) Japanese Utility Model Application Hei 6-53106 (JP, U) JP 494521 (JP, B1) (58) Fields investigated (Int. Cl. ⁶ , DB name) B28B 7/20 B28B 3/02 B28B 7/00 B28B 7/16

Claims (6)

(57) [Claims] 1. A thin elastic body having irregularities on at least the surface side is adhered to three surfaces of a metal lower mold having a longitudinal surface, a bent surface and a top surface, and a convex portion of the elastic material on the three surfaces A curved tile characterized in that the lower surface of the lower tile is in contact with the cavity formed in the lower mold, and all the cavities in the lower mold are connected to each other, and a sealed structure is formed and the cavity is filled with liquid. Mold. 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, and the upper and lower cavity portions are formed on the surfaces of the longitudinal surface and the curved surface. Open each one, and drill a cavity at the top of the lower mold,
The top cavity is opened on the top surface, the lower cavity is provided with an opening on the opposite side of the curved surface, and the upper and lower cavities on the longitudinal surface communicate with each other in the same direction. Manufacture a lower mold in which the cavities are in communication with each other, load the integrated upper and lower fillers in the upper and lower cavities, respectively, and heat-resistant and dissolve the liquid by the action of the liquid in the top cavity. After loading the elastic body, the elastic body is adhered to the longitudinal surface, the bent surface and the top surface of the lower mold, and is brought into contact with the surface of the upper and lower top fillings, and the unevenness is formed on the elastic body, and the lower filling is removed from the opening. After the upper filling is dropped into the lower cavity, the upper filling is pulled out from the opening, the liquid is injected from the opening, and the top filling is dissolved and discharged. The method of manufacturing the mold. 5. A hollow body of upper and lower parts and a top part is formed in a longitudinal part, a bent part and a top part of a lower mold made of a metal, respectively.
The upper, lower, and top cavities are opened on the longitudinal surface, the bent surface, and the surface of the top surface, respectively, and the lower cavities are provided with openings, so that all cavities are in communication with each other to produce a lower mold. Heat and liquid in the upper, lower and top cavities
After each of the fillings having solubility in is loaded, the elastic body is adhered to the longitudinal surface, the bent surface and the top surface of the lower mold, and is brought into contact with the surface of the upper and lower top fillings, and the unevenness is formed on the elastic body. A method of manufacturing a mold for a curved tile, wherein liquid is injected from an opening to dissolve and discharge top and bottom fillings. 6. When the upper and lower top fillings are loaded into the upper and lower and top cavities, the upper and lower top fillings slightly protrude from the surface of the lower mold, and when the elastic body is formed, the upper and lower top fillings are brought into contact with the surface of the upper and lower top fillings. 6. The method for manufacturing a bent-tile molding die according to claim 4, wherein the elastic member is formed so as to be in contact with and adhere to the surface of the lower die to form an uneven portion.