JPH0596520A - Method of dry-forming board-like building material such as tile - Google Patents

Abstract

PURPOSE:To provide a dry forming method, by which even thin tile or irregular- shaped tile can favorably be formed. CONSTITUTION:Under the condition that forming recesses 21 for forming board- like building material 10 are longitudinally set so as to form the board-like building material 10 in order to face its board faces vertically. Under the condition just mentioned above, powder stock 30 is charged from the opening 32 at the upper ends of the recesses into the forming recesses 26. After that, a front face forming mold 18 and/or a rear face forming mold 16 are moved horizontally so as to compress the powder stock 30 laterally in order to form the predetermined form.

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 plate-like building materials such as tiles.

[0002]

2. Description of the Related Art As a method for molding a plate-like building material such as tiles, there are known an extrusion molding method in which a raw material containing a large amount of water is wet-molded and a dry molding method in which a powder raw material is press-molded using a mold. Has been.

In the latter dry molding method, the powder material is filled in the molding recess and the die is moved in the vertical direction, whereby the powder material in the molding recess is pressed and compressed to a predetermined shape. Molding is a common method.

FIG. 4 specifically shows this dry molding method. In this method, as shown in FIGS. (A)-(I), a molding recess 100 is formed laterally so that a tile or the like is molded in a state where its plate surface is horizontal, and its wide upper end opening is formed. The feeder cup 102 is horizontally moved along this, and the powder material is filled in the molding recess 100.

Then, as shown in (II), the upper mold 104 is lowered to vertically compress the powder raw material in the molding recess 100 to mold it into a predetermined shape.

After this compression step is completed, as shown in (III), the upper mold 104 and the lower mold 106 are moved upward to take out the molded product.

[0007]

However, this method has a problem that it is difficult to satisfactorily mold a thin product.

In this method, in the step (I), when the feeder cup 102 is moved in the horizontal direction to fill the powder material into the molding recess 100, the rear end of the peripheral edge of the feeder cup 102 is molded into the molding recess 100. The operation is performed by sliding along the upper surface of the powder raw material filled inside, that is, aligning the upper surface of the filled powder raw material with the upper surface of the frame die 108. At this time, as shown in FIG. As shown, the powder raw material in the molding recess 100 is dragged by the feeder cup 102, resulting in a problem that the powder raw material filling amount in the molding recess 100 becomes uneven. ..

In addition to this, in the case of the above method, the molding recess 10
Since the opening of 0 is large, the filled powder raw material is easily blown off from the opening or soared up, which also causes non-uniform filling of the raw material.

Further, in the case of this method, there is a problem that it is difficult to manufacture the irregularly shaped product 110 as shown in FIG. 5 (A).

When molding this irregularly shaped product 110, as shown in FIG.
As shown in (B), the powder material is filled in the molding recess 112 according to its shape. Generally, the powder material is sprayed powder having high fluidity (dried and granulated by a spray dryer). Molding recess 1
Even if an attempt is made to keep the powder raw material in a plane shape corresponding to the product shape in 12, the powder raw material flows in the molding recess 112 and does not work well. Therefore, the irregularly shaped product is molded with a uniform density. It becomes difficult to say.

[0012]

The molding method of the present invention has been devised in order to solve such problems, and the gist thereof is a dry molding method for plate-like building materials such as tiles. , A molding recess for molding the plate-shaped building material is formed vertically so as to mold the plate-shaped building material with the plate surface thereof facing up and down, and the powder raw material is molded from the upper end opening thereof. The purpose is to fill the inside of the recess and move the die forming the forming recess horizontally or substantially horizontally to compress the powder raw material laterally and form it into a predetermined shape.

[0013]

As described above, according to the present invention, the molding recess of the plate-like building material such as tiles is formed vertically and the powder raw material is compressed laterally.

According to this method, the opening at the upper end of the molding recess becomes extremely small, and the problem of the above-mentioned fraying when filling the powder raw material, that is, the raw material powder is unevenly filled due to the catch on the powder raw material. It is possible to smoothly cut through without causing a problem such as getting stuck.

Further, since the opening is small, there is no problem that the powder raw material is blown off from the opening or the powder is blown up, and even a thin product can be molded with a good and uniform density.

Also, when molding a deformed product, the plate surface is directly molded by the mold in the left-right direction, and there is no need to incline or step the upper surface of the powder raw material in the molding recess. Therefore, such a deformed product can be molded well.

[0017]

Embodiments of the present invention will now be described in detail with reference to the drawings. In FIG. 1, reference numeral 10 denotes a plate-shaped irregular shaped ceramic tile having an inclined portion 14 that is inclined at a predetermined angle with respect to the main portion 12.

FIG. 2 shows the structure of a mold for molding the irregularly shaped tile 10. In the figure, 16 is a rear surface molding die,
Reference numeral 18 is a front molding die, 20 is a lower molding die, 22 is an upper molding die, and 24 is a side molding die. Of these, the rear molding die 16, the lower molding die 20 and the side molding die 24 are The front molding die 18 and the top molding die 22 are movable while being fixed.

Reference numeral 26 is a molding recess for molding the irregularly shaped tile 10, and the plate surfaces 10a and 10b of the tile 10 are formed.
Molding surfaces 26a and 26b for molding are oriented vertically. That is, the molding recess 26 is formed vertically.

FIG. 1 shows a modified tile 1 using this molding die.
It shows a procedure for molding 0. The molding procedure will be described with reference to the drawings.

First, as shown in (I), the upper molding die 22 is moved to open the opening 32, and the rear molding die 16 and the front molding die 18 are opened to some extent, and As shown in (I) and (II), the feeder cup 28 is moved along the upper surfaces of the molds 16 and 18, and the powder raw material 30 is supplied into the molding recess 26 through the opening 32 and filled. To do.

Next, as shown in (III), the opening 32 is closed by the upper surface molding die 22, and the front surface molding die 18 is moved in the direction of the arrow in the drawing to move the powder in the molding recess 26. Raw material 30
Is compressed and molded into a predetermined shape.

Subsequently, as shown in (IV), the front molding die 18 is retracted, the upper molding die 22 is moved to open the opening 32, and the molded article is ejected from below by air or the like. , Remove from the molding recess 26.

As described above, according to the method of this example, the plate-shaped irregularly shaped tile 10 is vertically formed.

According to this method, the powder raw material 30 is ground in the narrow opening 32 of the molding recess 26. Therefore, the filling amount of the powder raw material in the molding recess is reduced by scraping as in the conventional method. It does not cause non-uniformity, and there is no inconvenience that the powder raw material 30 in the molding recess 26 blows off or rises up from the opening 32 to make the raw material density non-uniform.

Therefore, according to the present method, even an extremely thin product can be molded satisfactorily and uniformly, and a modified product as in the above example can be molded without problems.

That is, there is no inconvenience that the powder raw material flows in the molding recess during molding of the odd-shaped product and molding becomes difficult.

The above is merely an example of the present invention.
The present invention can be applied, for example, when molding a deformed tile 34 having a corrugated cross-section as shown in FIG. 3, and not only the front molding die 36 but also the rear molding die 38.
Alternatively, the powder raw material may be compressed from the front and the rear by the movement thereof so as to be molded into a predetermined shape.

It is also possible to form a plate-like building material such as a tile by using powder raw materials of various materials other than the above example, and to form a thin rubber on the surface for molding the back of the tile or for other purposes. The present invention can be implemented in variously modified forms based on the knowledge of those skilled in the art without departing from the gist of the present invention, such as the use of a mold having a stretched line.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a procedure of a molding method according to an embodiment of the present invention.

FIG. 2 is a configuration diagram of a mold used in the molding method.

FIG. 3 is an explanatory diagram of another embodiment of the present invention.

FIG. 4 is an explanatory diagram for explaining the background of the present invention.

FIG. 5 is an explanatory diagram for explaining the background of the present invention.

[Explanation of symbols]

 10,34 Tile 16 Rear surface molding die 18 Front surface molding die 20 Lower surface molding die 22 Upper surface molding die 24 Side surface molding die 26 Molding recess 30 Powder raw material

Front page continued (72) Inventor Hideo Iijima 5-1-1, Koiemotocho, Tokoname-shi, Aichi Prefecture Inatsusu Co., Ltd. (72) Inventor, Hirokazu Matsumoto 5-1-1, Koiemotocho, Tokoname-shi, Aichi Ltd. Inakusu Co., Ltd.

Claims (1)

[Claims] 1. A method of dry-molding a plate-like building material such as tiles, wherein a molding recess for molding the plate-like building material is formed with the plate surface of the plate-like building material facing up and down. The powder material is filled vertically into the molding recess through the upper end opening, and the mold forming the molding recess is moved horizontally or substantially horizontally to move the powder material laterally. A dry molding method for a plate-like building material such as a tile, which comprises compressing and molding into a predetermined shape.