JPH03211010A - Molding method for two-dividable tile - Google Patents

Abstract

PURPOSE:To narrow the widths of respective connecting sections while securing the required bonding strength and cut well by dispersing the connecting sections in a plurality of lines in the extrusion direction and square direction on at least one continuous joint surface and carrying out molding in the state that respective tiles are connected at a plurality of connecting sections. CONSTITUTION:A molding die 10 is provided with a mold recessed section 12, and an intermediate mold 14 for molding a channel on the rear face of a tile and fin sections 18 for forming a cut for separating the tile are formed on the intermediate positions of both side faces. On the other hand, the intermediate mold 14 for forming a plurality of cuts for separation on the joint face of the tile are provided with a plurality of projected lines 20. When raw material body is extrusion molded, tiles 22 for drying work are in the state of overlapping two pieces. At that time, channels 24 on the rear surface side are formed simultaneously in a manner of being connected with a plurality of connecting sections 28 dispersed in the extrusion direction and square direction. When dried, calcined and divided, the same are separated in a beautiful manner in a plurality of connecting sections 28 and no flashes are generated. Also, as a plurality of connecting sections 28 are provided, enough strength can be secured.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for molding a split tile, and more particularly to a method for molding each tile in a state where each tile is connected by a connecting portion extending along the extrusion direction.

(Prior Art and Problems to be Solved by the Invention) As a method for extrusion molding tiles, a method is widely used in which two pieces of raw clay are extruded through a molding die at the tip of an extruder. In this case, the tiles are extruded while being connected to each other by connecting portions extending in the extrusion direction. Third
The figure shows the configuration of a molding die used when carrying out the molding method for a 2-split tile for dry construction. As shown in the figure, in this forming method, raw material clay is passed through a forming recess 102 formed in a forming die lOO to form two tiles for dry construction that have a groove in the center of the back side. Then, cuts for tile separation are made by projections provided on the outer frame 104 and the middle mold 106 of the molding die lOO, respectively. That is, in the conventional method, as shown in FIG. 4, each tile 108 is connected to each other by one wide connecting part 110 extending in the extrusion direction for each continuous mating surface 109. I tried to mold it in the same condition. This is necessary to prevent the two tiles 108 from separating from each other at the stage after the tiles 108 are formed and before firing, so in order to join each tile 108 with a certain degree of force, They are connected to each other by a wide connecting part.

(Problem to be Solved by the Invention) However, if the width of the connecting portion 110 is made wide in this way, it becomes difficult for the shearing force to act equally on each part of the connecting portion ito when dividing into each tile 108 after firing. As a result, as shown in FIG. 4(B), when the tile is forcibly divided at the connecting portion 110, the meat of one tile 108 may be torn off, or the connecting portion 110 may be removed from the other tile.
This can cause problems such as a large amount of meat remaining on the tiles, and this becoming flaky and protruding from the back of the tiles. If such cracks occur, not only will the appearance of the tile 108 as a product be impaired, but also, in the case of dry-installed tiles, the back side of the tile may come into contact with the mounting surface when it is attached to a wall or other mounting surface. This may lead to problems such as poor mounting posture of the tile 108.

Therefore, as shown in FIG. 5, the tiles 112 are formed so as to be connected to each other by connecting rods (disposable rods) 114, and the fired tiles 112 are separated at the joints with the connecting rods 114. There is. In this case, the connecting rod 114
Even if a break occurs as shown in FIG. 5(B) at the joint between the tile 112 and the tile 112, the break is located within the recess 116 created in the product tile 112, so special precautions should be taken when installing the tile 112. No inconvenience will occur.

However, in the case of this method, a large amount of active parts (connecting rods 11
4), there is a problem in that a lot of material is wasted and the product cost increases.

(Means for Solving the Problems) The present invention has been made to solve the above problems, and the gist thereof is to extrude raw clay through a molding die provided at the tip of an extrusion molding machine, thereby forming tiles. 2
When molding the sheets in a state in which they are connected to each other by connecting portions extending along the extrusion direction, the connecting portions are dispersed into a plurality of strips in a direction perpendicular to the extrusion direction on at least one continuous mating surface, and the plurality of sheets are The purpose is to form each tile in a state where they are connected at the connecting part.

(Operation and Effects of the Invention) In this way, the present invention has made it possible to disperse the connecting portion, which was conventionally a single strip on one continuous mating surface, into a plurality of strips along the mating surface in a direction perpendicular to the tile extrusion direction. It is something.

By doing so, it is possible to reduce the width of each connecting portion while ensuring the required bonding strength between tiles. If the width of each joint can be made narrower, when dividing the tile after firing, concentrated shearing force will be applied to the joint, and each joint will be cut well, resulting in two pieces. Good separation of mating tiles.

(Example) Next, embodiments of the present invention will be described in detail based on the drawings.

In FIG. 1, numeral 10 is a molding die for molding tiles for dry construction, and has molding recesses 12 for molding two tiles together, and inside these recesses 12 are medium-sized molds 14. 16 are arranged. The medium mold 14 is for forming a groove on the back surface of the tile, and has a main body with a cross-sectional shape corresponding to the groove shape, and a cut for separating the tiles is made at the middle position of both sides of the main body. A fin portion 18 is formed for this purpose.

On the other hand, the medium size 16 is for making a plurality of separation cuts in the mating surfaces of the tiles, and has a plurality of protrusions 20, respectively.

When the above-described forming die IO is attached to the tip of the extruder and the raw clay is extruded through the recess 12 of this forming die, two tiles 22 for dry construction are formed as shown in FIG. molded in the state. During the molding, grooves 24 on the back side are simultaneously formed, and cuts 26 are made along the mating surfaces of the tiles 22. These cuts 26 are dispersed along the mating surfaces of the tiles 22. In other words, each tile 22 is molded in a state in which each continuous mating surface is connected to each other by a plurality of connecting portions 28 distributed in a direction perpendicular to the extrusion direction. Here, the width 1 of each connecting portion 28 is, for example, about 1 to 2 mm, the interval 2 between the connecting portions 28 is about 1 to 2 mm, and the thickness 3 is about 0.6 mm. Incidentally, the width of the conventional connecting portion in similar tiles is about 4 to 511 layers. However, these numerical values only show an example.

Now, dry the tile 22 formed as described above.

When fired and divided into tiles 22, each tile 22 is neatly separated at a plurality of connecting parts 28, and there are no marks on the separated surface where the meat has been torn off, or conversely, where the meat has been raised. Paris will not occur. This is each connection part 28
This is because the strength of each connecting portion 28 is weakened due to the narrow width of the connecting portion 28, and the shearing force at the time of division tends to act intensively on each connecting portion 28.

On the other hand, the overall connection strength between each tile 22 is ensured by the plurality of connection parts 28, and there is no problem such as the tiles 22 separating from each other before firing. do not.

Although the embodiments of the present invention have been described in detail above, the present invention can be applied, for example, to the molding of 2-split tiles in various other forms, and the dimensions, shape, number, etc. of the connecting portions can be changed depending on the tile. It is possible to make various changes based on the knowledge of those skilled in the art without departing from the spirit of the invention, such as making changes as appropriate depending on the size, shape, etc. of the invention.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram of a molding die used in a molding method according to an embodiment of the present invention, and FIG. 2 is a front view of a halving tile molded by the molding method. Fig. 3 is a schematic diagram of a forming die used in the conventional forming method, and Figs. 4 (A) and (B) respectively explain the two-split tiles obtained by the conventional method and their problems. 5A and 5B are explanatory diagrams of two-split tiles obtained by other conventional molding methods and their problems, respectively. lO: Molding die 22: Dry construction tile 28: Connecting section JP-A-3 211010 (4)

Claims (1)

[Claims] By extruding the raw clay through a molding die installed at the tip of an extrusion molding machine, when molding two tiles in a state where they are connected to each other by a connecting part extending along the extrusion direction, the connecting part is at least A method for forming a 2-split tile, which comprises dispersing it into a plurality of strips in a direction perpendicular to the extrusion direction on one continuous mating surface, and forming the tiles in a state in which each tile is connected at a plurality of connecting portions.