JPS63295205A - Preparation of tile of thin thickness and extrusion mold for tile molding raw material therefor - Google Patents

Abstract

PURPOSE:To make it possible to mass-produce a tile of thin thickness stably and without deforming the shape, by extrusion-molding a plurality of bodies for molding tiles formed in a parallel integrally connected with parts of shelf plates, cutting them in a specific length, calcinating them and thereafter removing therefrom the parts of shelf plates by cutting to obtain products. CONSTITUTION:Clay as a raw material kneaded by means of a clay-kneader is passed through a sleave 8 and extruded from a mold S. In this case a plurality (for example 10 pieces) of bodies T for molding tiles of 6mm in thickness formed in parallel are molded in equal distances (for example 6 mm) which are equal to the thickness of a core K. At the same time, they are extrusion-molded integrally with parts E of shelf plates of, for example, 6mm in thickness and extruded at the same time at the parts of their upper and lower edge faces. Then, these are cut in the lateral direction in the tile length by means of a wire and dried as they are. Then, they are put in an oven and baked. The parts E of shelf plates are striken to cut calcinated tile from the parts E of shelf plates and tile products are thereby obtained. At this time, when the parts E of shelf plates are striken, parts between dividing grooves Tb for forming edge faces and dividing grooves Tc from the rear parts of tile bodies are broken to have individual tiles.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for manufacturing thin tiles by wet extrusion and an extrusion mold for tile-forming fabric used therein.

(Problems to be solved by Development II) Thin tiles have traditionally been formed using dry press molding, but dry press molding generally takes time and effort to form tile fabric, making it unsuitable for mass production and requiring limited equipment. It is well known that this increases costs.

Therefore, wet press TF3L, which can be mass-produced at a low cost, is effectively used.This is a method of forming two rows of tile molding dough A by passing the tile raw material clay through a mold and facing each other on the back side, as shown in Figure 7. It is obtained by extruding and cutting into a predetermined length.

However, in this case as well, the thickness was limited to about 15 layers and could not be made any thinner. That is,
In wet extrusion, it is difficult to maintain a balance between horizontal and vertical extrusion pressures, which tends to cause shape defects, and if the material is made thinner, it becomes difficult to extract it and deformation occurs.

For this reason, in recent years, as shown in Figure 8, by extruding the thin tile molded fabric B facing below -E and integrally connecting the standing legs C through the grooves, it is possible to easily extract the material and maintain it. A method that allows for good shape is used.

However, this method has the following problems.

(a) In firing Jh, since the standing leg C, which will later be discarded, is removed, a large amount of raw clay is wasted, resulting in a poor yield.

(o) Since the connecting part of the standing leg C is the sole pedestal zone Ba of the tile, the surface of the pedestal zone Ba from which it is removed often becomes uneven, which causes problems during construction. In this case, applying a smooth finish is an extremely troublesome task.

(c) When building the kiln for firing, the tile molding dough is stacked lying flat on the shelves, which takes up a lot of space, making it impossible to fire all at once.Also, this is the same problem as before, but the shelves are stacked in multiple tiers. If you have to put up legs to support the shelves to stack them, stacking them in the kiln is a hassle.

(d) Since the surface of the tile is always located on the outside and pushed out, the corners are easily deformed or chipped when the tile is removed, cut or moved, resulting in poor product value.

(Means for Solving the Problems) Therefore, the present invention provides something that can sufficiently solve these problems.

For this reason, the manufacturing method of the first invention is such that a plurality of medium molds are formed in parallel at intervals equal to the thickness of the medium molds, by force-feeding raw material clay for tiles into a mold in which a plurality of medium molds are arranged in parallel in a base. Tile molding fabric.

Each part of the II4I4 side end is integrally connected and extruded with a shelf part extruded at the same time, and after cutting this into a predetermined length and firing, the shelf part is separated to produce a product. It consists of:

Further, the mold of the second invention is a mold consisting of one die and a medium die, and has a surface shape corresponding to the shape of the surface of the tile to be molded on one side, and a recess on the back surface of the tile that can form a sole protrusion. A plurality of medium-sized pieces each having a strip formed on the other side are spaced apart from each other by the thickness of the tile, and are oriented in the same direction so that both end surfaces perpendicular to one side are at a predetermined distance from the opposing inner peripheral surface of the cap. The gist of the invention is that end face forming protrusions, which are arranged in parallel and parallel to the tile extrusion direction on one side of each medium mold, are provided oppositely protruding toward the tile forming space side to form the side end face of the tile by means of the grooves formed. It is structured as follows.

(Example) Hereinafter, the manufacturing method of the first invention will be explained while explaining an example of the mold of the second invention.

The mold S of this example shown in FIGS. 1 to 3 consists of a die 1 and nine medium molds K, and the die 1 forms a molding cavity 1a opening in a horizontally long rectangular shape on its inner periphery. .

The medium-sized tile has a thickness of about 6 mils, and can be formed with a surface shape (in this example, a flat surface) on one side 2 according to the shape of the tile surface to be molded, and a sole protrusion can be formed on the back surface of the tile. A dovetail groove-like concave zone 3a is formed on the other side surface 3.

Then, the medium-sized K are erected at intervals equal to the thickness of the tile fabric, and are lined up horizontally in the same direction, and each medium-sized K is supported by a support rod 6, and a mounting frame is secured to the base 1 by bolts. The support rod 6 is bolted to 7 to form an integral connection structure between the medium-sized K and the support rod 6.

In addition, wedge-shaped projecting bands 2a for forming grooves for forming the side end surfaces of the tiles are provided on the upper and lower ends of one side surface 2 of each medium mold parallel to the tile extrusion direction, protruding toward the tile forming space, - A wedge-shaped protruding strip 2 is formed on the medium-sized sturdy medium-sized part, and a protruding strip 3b forming a split groove on the back side of the tile is provided near the top and bottom ends parallel to the tile extrusion direction on the other side 3 of the medium-sized part.
It protrudes toward a.

Then, the mold S is formed by placing a medium mold in the molding cavity 1a of the mouthpiece 1 at a predetermined distance (about 6 m in this example) from the inner circumferential surface of the molding cavity 1a.

Note that one side of the molding cavity 1a has a medium shape and the other side 3
A dovetail groove-like concave band 1b and a protruding strip 1c are formed in the same shape as the molding cavity 1a, and a wedge-shaped protruding band 1d is provided in the upper and lower parts of the mold by making the other side surface of the molding cavity 1a the same as the shape of one side surface 2 of the medium mold. ing. Further, 8 is a sleeve for raw clay, which is connected to the tip of a clay kneading machine (not shown).

A method for manufacturing the tile of this example using the mold S configured as described above will also be explained.

First, the raw clay kneaded in the clay kneader passes through the sleeve 8 and is extruded from the mold S, as in the conventional method.

At this time, the characteristic feature is that the medium thickness is equally spaced (6I).
As shown in Fig. 4, multiple pieces of 6 mm thick tile molding fabric formed in parallel (10 pieces in this example) are extruded at the same time from part of the upper and lower end surfaces of each tile fabric. It is extrusion molded integrally with the shelf board E of the. That is, as shown in FIG. 5, a tile-formed fabric T having a flat surface and a sole protrusion Ta protruding from the back side has an end face forming section formed by a wedge-shaped protrusion 2a and a protrusion 3b at the upper and lower ends, respectively. The groove Tb is connected to the shelf E between the groove Tc and the groove Tc from the back of the tile material.

Next, this is cut to the length of the tile in the width direction with a wire, dried as it is, packed in a kiln and fired, and the shelf board E is struck to separate the fired tile from the shelf board E to produce a tile product. This is what we get. At this time, by hitting the shelf E,
The tile shown in FIG. 6 is created by cracking between the end face forming groove Tb and the groove Tc from the back of the tile fabric.

Although this example is configured as described above, the present invention is not limited thereto.

In the manufacturing method of the first invention, the shape of the tile molding dough and the shape of the seed plate portions that are extruded at the same time from part of both end surfaces of the tile molding dough are not limited, and the tile molding dough is required to be oriented in the same direction. Furthermore, in addition to arranging the tile molding fabric vertically and horizontally as in this example, it is also possible to arrange the tile molding fabric vertically with the shelf board section vertical and extrude it. Note that the continuous portion between the tile molding material and the shelf board portion may be a part of the end face portion of the tile molding material.

2) In the A Ming mold, the shape of the medium size and the shape of the inner circumferential surface of the base do not matter, as long as it matches the shape of the tile to be molded, and the connection configuration of the medium size and the number of pieces to be provided are also appropriate. .

Roughly speaking, the shape of the end face forming protrusion that forms the end face shape of the tile using the split grooves may be arbitrary, but a wedge shape is optimal. In addition, in this example, one groove was also formed on the back side of the tile molding fabric by providing a protruding strip toward the end face forming protrusion.
This protrusion may not be provided.

(Effects of the Invention) According to the first production method of Ill, the following effects are obtained.

(+) Since a large number of thin tiles are integrally connected to the shelf board and extruded, it is possible to stably and mass-produce even thin tiles without deformation.

(2) After firing, it is only necessary to discard the shelf board, which results in waste material, resulting in less loss of raw clay and better yield compared to conventional methods.Tile molding dough because multiple pieces of tile molding dough can be molded at the same time. The portion of the seed plate per sheet is extremely small.

(3) Since the surface of each tile molding fabric is molded in a shape hidden inside the shelf board, it is possible to prevent movement, deformation during work, and breakage of the corners, allowing you to work with peace of mind. It is.

Also, since the tile molding fabric is hidden, there is no chance that 9g of powdered glaze applied to other products will scatter and adhere to the tile surface.

(4) Also, since the surface of the tile molding fabric is molded while being hidden inside the shelf board, when cutting the extruded tile molding fabric group to an appropriate length, it is necessary to cut the extruded tile molding fabric into appropriate lengths by cutting the wire from the shelf board. By cutting, the surface of the tile molding fabric can maintain its extruded flat state without causing the clay to shrink due to the wire.

(5) Since the shelf board section, which is a waste of material, is used as a shelf board when filling the kiln during firing, the conventional shelf board is no longer needed and the kiln can be stacked as is, which greatly simplifies the kiln filling work. It is.

(6) Since the shelf board is integrally molded into the tile molding material, shrinkage occurs in the tile molding material and the shelf board at the same time and in the same dimensions during firing, so conventional separate shelf boards are used. In this case, there is less deformation of the tiles compared to stacking.

Furthermore, since the tile molding materials are separated from each other, no separated powder (silica sand) is required during firing.

(7) Since the shelf board part that serves as a margin is connected to the side of the tile, the pedestal band remains pushed out and remains smooth, so there is no problem with construction, and the direction of the construction work is can be achieved.

In addition, after firing, there is a 6th plate on the side of the tile from which the shelf part has been removed.
Even if the convex portion lO or the four portions 11 as shown in the figure occur, there is no problem because they are not exposed on the surface due to the joints during construction.
There is no need to perform any work to remove the convex portion 10.

(8) In addition, since the tile molding materials are evenly arranged in parallel, there is no uneven drying or firing, and since it does not take up space when filling the kiln, it can be fired in large quantities and manufactured at low cost.

Furthermore, in addition to the effect of integrally extruding the tile molding fabric with the shelf board section described above, the mold of the second invention also reduces wear and tear on the mold because a large number of tile molding fabrics can be integrally molded at once. There are also some advantages.

[Brief explanation of drawings]

Fig. 1 is a front view showing an embodiment of the mold of the present invention; Fig. 2 is a reduced cross-sectional plan view thereof; Fig. 3 is a longitudinal cross-sectional side view similarly reduced; Fig. 4 is a perspective view of the mold in an extruded state; Figure 5 is a front view of the main parts of the extruded tile molding fabric group, Figure 6 is a side view of the tile with the shelf board removed, and Figures 7 and 8 are tiles extruded from a conventional mold. It is a perspective view of a group of molded doughs. TC: split groove, E: shelf part. Patent applicant Hidetoshi Matsushima, patent attorney representing Oribe Seito Co., Ltd. Figure 2

Claims (4)

[Claims] (1) By force-feeding tile raw material clay into a mold consisting of a plurality of medium molds arranged in parallel in a die, a plurality of tile molding doughs are formed in parallel at intervals of the thickness of the medium molds.
A thin product that is extrusion molded by being integrally connected with a shelf board part that is extruded at the same time at a part of both end faces of each part, which is cut to a predetermined length and fired, and then the shelf board part is separated to make a product. Method of manufacturing tiles. (2) The method for producing a thin tile according to claim 1, wherein, during extrusion, grooves are integrally formed on the back of the tile at the connection portions with the shelf portions on both end faces of each tile molding fabric. (3) A mold consisting of a cap and a medium mold, which has a surface shape that corresponds to the shape of the tile surface to be molded on one side, and a concave zone on the other side that can form a sole protrusion zone on the back side of the tile. A plurality of medium-sized medium-sized molds made of Extrusion of a thin tile-forming fabric, characterized in that edge-forming projecting strips for shaping the side end faces of tiles by grooves to be formed are provided on both ends parallel to the tile extrusion direction on one side, facing toward the tile-forming space side. Mold. (4) A patent claim in which protruding strips forming grooves on the back side of the tile are provided at both ends parallel to the tile extrusion direction on the other side of each medium size, protruding toward the end face forming protrusion of the adjacent medium size. The mold described in Range 2.