JPH0740324A - Method for manufacturing split skin accessory tile - Google Patents

Abstract

(57) [Summary] [Object] To provide a manufacturing method capable of obtaining an accessory tile having a split surface in an integrally molded state. [Structure] Extrusion mold 20 at the tip of extruder 18 for tile raw material
When wet-extruding through the opening 22 of the above to obtain a preformed body of the split skin accessory tile, the tile raw material is extruded from the first piece portion 12 with a certain amount of thick wall in an annular cross section, and at the time of extrusion, the second piece portion 14 and The portion adjacent to the opposite side in the thickness direction is separated by the separating portion provided in the extrusion molding die 20 so that the second piece 14 has the same thickness as the product and the facing piece is the second piece. After extrusion molding with a wall thickness corresponding to 14, and firing the obtained molded body or prior to firing, forcibly dividing the first piece portion 12 and a portion adjacent to the first piece portion 12 in the thickness direction. Then, a split skin surface is formed on the first piece portion 12, and unnecessary portions in the circumferential direction are separated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a bent accessory tile having a split surface.

[0002]

2. Description of the Related Art Tiles having a compulsory dividing surface, that is, a so-called split surface, are widely used as a tile having a natural aesthetic appearance. The conventional manufacturing method of this kind of split skin tile is, as shown in FIG. 6 (a), wet-extruding two tiles 100 into a combined state, and after drying or firing, the divided portion indicated by an arrow. It was something like forcing a knife to divide into pieces. When the blade is forcibly divided in this way, the divided surface 102 is irregular and has an uneven surface.
Becomes

However, the tile obtained by such a method is limited to the flat-shaped split-skin tile 100, and the split-skin surface 1
The accessory tile having No. 02, for example, the L-shaped accessory tile 104 shown in FIG. 6B, could not be manufactured by such a method in the related art.

Therefore, as a method of manufacturing such a split skin accessory tile 104, as shown in FIG. 6B, a first piece portion 106 having a split skin surface 102 and a first piece portion 106 having no split skin surface are provided. A method has been used in which the two piece portions 108 are manufactured independently and separately, and they are bonded and integrated with an adhesive.

However, when the split-skin accessory tile 104 is manufactured by such a method, not only the number of manufacturing steps increases and the productivity deteriorates, but also the adhesive portion becomes apparent in appearance, and the aesthetic appearance of the tile is improved. There is a problem of being damaged.

Another method that can be considered as a method of manufacturing an accessory tile having a split surface corresponds to the first piece portion 106 on which the split surface is to be formed, as shown in FIGS. The portion to be formed is formed to have approximately twice the thickness (in the figure, two tiles are formed in a combined state), and after that, the divided body is divided into two parts by the dividing part 110 after drying or firing. For example, it is difficult to actually mold and manufacture accessory tiles satisfactorily by such a method.

The reason is that the thickness of the second piece portion 108 becomes thinner than the combined thickness of the first piece portion 106 and the portion 112 to be divided later, and the wall thickness balance is significantly deteriorated. It is impossible to obtain a good product because it cannot be satisfactorily molded or warpage or other deformation or crack occurs after molding.

[0008]

The present invention has been made to solve the above problems, and its gist is to provide a first piece having a split surface and a second piece having no split surface. In the method for producing a bent-shaped split skin accessory tile, the tile raw material is wet extruded through an opening of an extrusion mold at the end of the extruder to obtain a preformed body of the split skin accessory tile. The tile material is extruded from the first piece in a certain amount with a thick wall in an annular cross-section, and at the time of extrusion, a portion adjacent to the second piece and the opposite piece in the thickness direction is formed by the extrusion molding die. The second piece is extruded to have the same wall thickness as the product and the facing piece is extruded with a wall thickness corresponding to the second piece, and the obtained molded body is fired. The first piece portion and a portion adjacent to the first piece portion in the thickness direction after or before firing. Force divided and the form of split skin surface to said piece part is to and separating an unnecessary portion in the circumferential direction.

[0009]

As described above, according to the present invention, when the tile raw material is extruded, the tile raw material is extruded in a certain amount thicker than the thickness of the first piece portion to form the split skin surface and in an annular cross section. Thus, according to this method, it is possible to prevent the extruded wall thickness of the tile raw material from being significantly unbalanced in the circumferential direction, and the tile raw material can be satisfactorily extruded.

In the present invention, the portion adjacent to the second piece portion and the opposite piece portion in the thickness direction is automatically separated at the same time as the extrusion by the separation portion provided in the extrusion mold. Therefore, the second piece can be molded at the same time as the extrusion molding to have a wall thickness equivalent to that of the product.

During this extrusion molding, the first piece portion and the portion adjacent thereto in the thickness direction are integrally formed.
Thus, the portion adjacent to the first piece portion in the thickness direction is forcibly divided after firing or prior to this, whereby a forced division surface, that is, a split surface is formed on the first piece portion. That is, a bent skin split accessory tile having a first skin and a second skin integrated with a skin split surface on the first skin is obtained.

[0012]

Embodiments of the present invention will now be described in detail with reference to the drawings. In FIG. 4, reference numeral 10 denotes a split skin accessory tile having an L-shaped cross section, which has a first piece part 12 and a second piece part 14, and a split skin surface 16 is formed on the first piece part 12. There is.

In FIG. 2, reference numeral 18 is an extruder, and an extrusion molding die 20 is fixedly provided at the tip thereof. The front structure of the extrusion molding die 20 is specifically shown in FIG. As shown, the extrusion mold 20 has an opening 22
The middle mold 24 for molding the hollow part of the molded body in the central part
Are fixedly placed.

The molding die 20 comprises a molding space 26 for molding the first piece portion 12, a molding space 28 for molding the second piece portion 14 continuous with the molding space 26, and the first piece portion 1.
2 is adjacent to 2 in the thickness direction, and has a molding space 30 for molding a portion to be forcibly divided from the first piece portion 12 in the circumferential direction with respect to the molding spaces 26 and 28. Adjacent molding spaces 32 having an L-shaped cross section are provided. Further, molding spaces 34, 36, 38 are formed on the outer peripheral side.

These outer peripheral molding spaces 34, 36, 38
Is partitioned from the molding space on the inner peripheral side by partition bars (separation portions) 40, 42, 44. In addition, 45 is a partition bar 40,4
2 and 44 are reinforcing portions, and 46 and 48 are portions formed through the L-shaped molding space 32 and the molding space 2
6, a projecting piece for forming a cut groove for separating the first piece portion 12 and the second piece portion 14 in the accessory tile 10 of FIG.

In this example, the dimension of each molding space in the thickness direction is l ₁ , l ₂ , l ₃ , l ₄ , l ₅ , l ₆ , l ₇ ,
l ₈ is 25 mm, 25 mm, 35 mm, 15 m, respectively
m, 15 mm, 20 mm, 15 mm, 20 mm.
However, this is just an example.

As described above, in this embodiment, a molding space having a certain width wider than the wall thickness of the first piece 12 is formed around the middle die 24 in the extrusion molding die 20 to extrude the tile raw material. Extrusion molding is performed through the extrusion molding die 20 attached to the tip of the machine 18 (FIG. 5 (I)).

When the tile raw material is extruded through the extrusion molding die 20, the outer peripheral molding spaces 34, 36,
The tile raw material extruded through 38 is automatically separated at the same time as it passes through the molding space of the extrusion molding die 20 as shown in FIG.
Only the tile raw material extruded through 0 and 32 constitutes an integral molded body.

The obtained molded body is then dried and fired,
After the firing, before firing, or after drying, the portion molded through the L-shaped molding space 32 is separated from the L-shaped accessory tile 10 having the first piece portion 12 and the second piece portion 14. (See FIG. 5 (III)).

Further, the portion extruded through the molding space 30 is forcibly divided from the first piece portion 12 of the accessory tile 10, whereby the split surface 16 is formed on the first piece portion 12.
Is formed.

The tile raw material extruded through the molding spaces 34, 36, 38 on the outer peripheral side divided by the partition bars 40, 42, 44 is returned to the raw material after extrusion and is reused.

As described above, according to the method of this embodiment, the tile raw material is extruded in a thickness-balanced state through four molding spaces surrounding the middle mold 24, and therefore the tile raw material can be excellently extruded. .

After the extrusion molding, the first piece 12 and the second piece 14 continuous with the first piece 12 are separated from the other parts, and the portion adjacent to the first piece 12 in the wall thickness direction is forced. By dividing, the split surface 16 is formed on the first piece portion 12, whereby the first piece portion 12 and the second piece portion 14 are integrated and the split surface 16 is provided on the first piece portion 12. The split skin accessory tile 10 can be obtained.

The embodiment of the present invention has been described in detail above, but this is merely an example, and the present invention can be implemented in a mode in which various modifications are made based on the knowledge of those skilled in the art without departing from the spirit of the invention. is there.

[Brief description of drawings]

FIG. 1 is a diagram showing a front structure of an extrusion molding die used in an embodiment method of the present invention.

FIG. 2 is a diagram showing a state in which this extrusion mold is attached to the tip of an extruder to perform extrusion molding.

FIG. 3 is a diagram showing a dimensional relationship of the extrusion mold of FIG.

FIG. 4 is a perspective view of a split skin accessory tile obtained by the method according to the embodiment of the present invention.

FIG. 5 is an explanatory view of the main steps of the method according to the embodiment of the present invention.

FIG. 6 is an explanatory diagram for explaining the background of the present invention.

[Explanation of symbols]

 10 Split skin accessory tile 12 1st piece part 14 2nd piece part 16 Split skin surface 18 Extruder 20 Extrusion mold 22 Opening 40, 42, 44 Partition bar 26, 28, 30, 32, 34, 36, 38 Molding space

Claims (1)

[Claims] 1. A method for producing a bent split skin accessory tile having a first piece portion having a split surface and a second piece portion having no split surface, and a tile raw material is extruded at the tip of an extruder. When obtaining a preformed body of the split skin accessory tile by wet extrusion through an opening of a forming die, the tile raw material is extruded from the first piece portion in a circular shape with a certain thickness and the second piece is extruded at the time of extrusion. Part and a part adjacent to the opposite part in the thickness direction are separated by a separating part provided in the extrusion molding die so that the second piece has the same thickness as the product and the opposite piece is formed. After extrusion molding with a wall thickness corresponding to the second piece, and after firing the obtained molded body or a portion adjacent to the first piece in the thickness direction with respect to the first piece before firing. And forcibly dividing to form a split surface on the first piece and separating unnecessary portions in the circumferential direction. A method for manufacturing tiles for split skin accessories.