JP2630167B2 - Curved tile forming method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a curved tile, and more particularly to a curved tile having a groove or a notch along a curved direction of a curved surface, which can be easily manufactured with high production efficiency. The present invention relates to a method for forming a tile.

[0002]

2. Description of the Related Art In corners of buildings, etc.,
A curved tile 1 as shown in the figure may be constructed.
Conventionally, when such a curved tile 1 is extruded from a raw material kneaded material from an extruder to form a formed body, a formed body 2 curved in a direction perpendicular to the extrusion direction A is continuously extruded as shown in FIG. And cut it into fixed lengths (broken line position in FIG. 7)
After that, it is manufactured by firing.

[0003] By the way, a tile may be provided with a notch in a corner portion from the construction surface, or a groove or the like may be formed on the surface for the purpose of decoration or the like. And, as shown in FIG.
Also in the curved tile 3, notches 3a,
In some cases, grooves 3c and 3d are formed on the surface 3b and the surface.

[0004] The method of manufacturing a curved tile shown in FIG.
It is suitable for the manufacture of the curved tile 1 having no notch or groove as shown in FIG. 6, but has notches 3a and 3b and grooves 3c and 3d along the curved direction of the curved surface as shown in FIG. It is extremely unsuitable for the manufacture of the curved tile 13.

That is, in the extrusion molding method as shown in FIG. 7, it is not possible to form notches or grooves along the curved direction of the curved surface of the curved tile during extrusion. For this reason, it is necessary to perform a cutting operation for forming a notch or a groove on the molded body obtained by extrusion molding, but it is not possible to form the notch or the groove along the curved direction of the curved surface of the curved tile. The productivity is very poor because it is very troublesome and requires a high degree of skill.

In order to solve such a problem, the present applicant has filed a Japanese Patent Application No. Hei.
No. 02), the extrudate from the extruder for kneaded clay is cut into a straight body so that the extrusion direction is the longitudinal direction, and the straight body is pressed against a curved surface and curved along the longitudinal direction. This paper proposes a method for forming curved tiles.

In such a method for forming a curved tile, the extruded direction of the kneaded clay from the extruder is a curved direction. For this purpose, grooves and notches are formed in advance by extrusion molding, and this is cut so that the extrusion direction is the longitudinal direction to form a straight body, and the straight body is pressed against a curved surface to form the straight body. , A curved tile having a groove or a notch along the curved surface can be easily obtained.

[0008]

Problems to be Solved by the Invention Japanese Patent Application No. 2-11092
In the method of No. 8, since a straight extruded product is bent, the amount of deformation given to the molded product is large. for that reason,
In the case of manufacturing a curved tile having a large degree of curvature, there is a possibility that a crack may occur in the molded body during bending.

[0009]

According to the method of forming a curved tile of the present invention, a kneaded material is extruded from an extrusion port of an extruder, and the extruded product is cut so that the extrusion direction becomes a longitudinal direction. In the method of obtaining, in a plane perpendicular to the extrusion direction of the extrusion port, the extrusion speed distribution is adjusted so that the extrusion speed on one side of the extrusion port is increased, thereby extruding the extrudate extruded from the extrusion port. Warped to a curved extrudate,
The curved extrudate is cut to obtain a bent tile.

[0010]

When the extrusion speed of the material from the extrusion port is increased on one side of the extrusion port in a plane perpendicular to the extrusion direction (hereinafter, sometimes referred to as an extrusion cross section), the extrudate is extruded while warping. Become so.

In a general tile forming process, the extrusion speed of a material in an extrusion cross section is adjusted so as to be as uniform or symmetrical as possible so as not to generate such warpage. The non-uniformity of the extrusion speed distribution in the extrusion cross section is promoted to generate the warpage positively, thereby producing a warped extruded product.

[0012]

Embodiments will be described below. FIG. 1 is a perspective view of a tip portion of an extrusion molding machine, and FIG. 2 is a perspective view from the back side of a molding die having an extrusion speed adjusting function.

In FIG. 1, a molding die 12 is attached to the tip of an extruder 10. The forming die 12 has an extrusion port 14 for products and an extrusion port 16 for separating discarded portions (ears) at both ends separated by a partition plate.
The extruded product is extruded so that the ears at both ends are separated at the same time.

As shown in FIG. 2, two pairs of resistors (baffles) 18 and 20 are provided inside the molding die 12 on the back side so as to be extruded and retractable. These resistors 18,
20 is moved by operating the bolt 22. When the resistors 18 and 20 are brought close to the extrusion port 14, the extrusion speed of the material is reduced at the periphery of the extrusion port immediately adjacent to the resistor.
Conversely, when the resistors 18 and 20 are retracted and moved away from the extrusion port 14, the extrusion speed of the resistor from the nearest edge of the extrusion port increases.

In the forming die 12, an extrusion port 14
When the extrusion is performed by positioning the resistor 20 so that the extrusion speed from the one long side 140 side is higher than the other long side 141 side, as shown in FIG. The extruded material 24 extruded from the resin is bent so as to be concave toward the long side 141 side. In FIG. 3, reference numeral 26 denotes a discarded portion extruded from the extrusion port 16;
Reference numerals 0 and 32 are guide rollers.

When the molded product 24 extruded in such a warped state is cut into a predetermined length, a curved molded product 34 shown in FIG. 4 is obtained. The molded body 34 may be replaced by a fifth
Molding surfaces 36a, 38 of the finished curved dies 36, 38 shown in the figure.
a to finish the specified curvature. In this case, since the formed body 34 has already been bent to a required degree, the amount of bending deformation imparted by the bending dies 36 and 38 is small. Therefore, the formed body 34 is not cracked when being finished and bent by the bending dies 36 and 38.

The molded body 34 thus obtained is dried and fired to produce a curved tile. In the present embodiment, since the tiles are split tiles, the two bent tiles 34A and 34 are formed by firing and then splitting against the central hollow portion 34a and the slit 34b.
The product of B is obtained.

In the present invention, when it is necessary to provide a groove or a notch along a curved surface in a curved tile manufactured as shown in FIG. 8, a protrusion for forming a groove or a notch is provided on an extruder. An extruded body having a groove and a notch is provided in advance.

In FIG. 5, a curved mold 3 for forming a convex curved surface is shown.
Although a pair of dies 8 and concave curved surface forming dies 36 are used, only one of them may be used.

The method for forming a curved tile according to the present invention is extremely effective particularly for producing a curved tile having a groove or a notch along a curved direction of a curved surface, but producing a curved tile without such a groove or a notch. Needless to say, it can also be applied to.

[0021]

As described above in detail, according to the curved tile forming method of the present invention, even if the curved tile has grooves or cutouts along the curved direction of the curved surface, complicated groove processing or cutting of the curved surface is required. It is possible to manufacture easily and efficiently with high productivity without requiring chipping. Even a curved tile having a large degree of curvature can be formed without causing cracks.

[Brief description of the drawings]

FIG. 1 is a perspective view of an extruder used in a method for forming a curved tile according to the present invention.

FIG. 2 is a perspective view of a forming die.

FIG. 3 is a perspective view showing an extruded state.

FIG. 4 is a perspective view of a curved molded product.

FIG. 5 is a perspective view of a finishing mold.

FIG. 6 is a perspective view of a curved tile.

FIG. 7 is a perspective view showing a conventional method.

FIG. 8 is a perspective view of a curved tile.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 extruder 12 molding die 14, 16 extrusion port 18, 20 resistor 24 extruded product 34 molded product 36, 38 curved type

Claims (1)

(57) [Claims] 1. Extruding a kneaded clay from an extrusion port of an extrusion molding machine,
In a method of cutting the extrudate so that the extrusion direction becomes a longitudinal direction to obtain a tile molded body, the extrusion speed on one side of the extrusion port is increased in a plane orthogonal to the extrusion direction of the extrusion port. The extrudate extruded from the extrusion opening is warped into a curved extrudate, and the curved extrudate is cut to obtain a curved tile. Law.