JPS60165206A - Method of forming flow sinking pattern of molding green foundation and block-shaped molding material made of ceramicobtained through said method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The present invention provides a method for forming a flow pattern that creates an aesthetically pleasing design on the surface of a green molded material, and a method for drying, firing, and other various steps on the molded material using the method. The present invention relates to a ceramic block-shaped molded material obtained by this method.

In this specification, the flow pattern refers to the movement of the coarse raw material relative to the fine raw material when extrusion molding the molding raw material in which the fine grain raw material as the main material and the coarse grain raw material as the rigid material are kneaded. It refers to the shape that is created by temporarily stopping or delaying the relationship and carving its locus on the surface of the green material.

Conventionally, the patterns obtained by wet extrusion methods have been limited to continuous patterns drawn along the extrusion direction and uneven patterns regularly stamped. The formation of other patterns was considered to be impossible due to the structure of the extrusion molding machine, and for this reason, there was no room for attempts at developing new patterns.

In view of the above circumstances, the present invention has been made to overcome the conventional conventional wisdom, and is a novel method for forming a flow pattern scattered unspecified on the surface of a green substrate by a wet extrusion method, and a method thereof. Ceramic block-shaped molded material obtained by (hereinafter referred to as
The object of the present invention is to provide a method of the present invention and a molding material of the present invention.

The gist of the method of the present invention for forming a flow pattern on the surface of an extruded raw material is that a peeling line for removing the skin layer of the extruded raw material is placed in an extrusion molding machine in which a peeling line is stretched over the die outlet. A molding raw material kneaded so that the raw material and a coarse grained raw material as an auxiliary material are uniformly distributed is loaded and extruded, and during extrusion, the molding product is The process involves drawing a flow pattern on the carved surface of the base material.

Moreover, the gist of the ceramic department block-shaped molded material obtained by the method of the present invention is that the flow pattern due to the coarse raw material mixed in the molding raw material is depicted as scattered unspecified on its surface. be.

The method of the present invention and the molded material of the present invention will be explained below based on drawings showing examples thereof.

FIG. 1 is a schematic perspective view showing an outlet of a die portion 1a of an extrusion molding machine 1 used in the method of the present invention. In addition, the same figure shows the case where the molded raw material 2 is a chive split tile material,
In the figure, 28 is the plane to be divided, and 2b.

2b, . . . indicate the portions that will form the sole feet of the tile after the division.

The most characteristic structure of the apparatus used in the method of the present invention is the die section 1a of the extrusion molding machine 1.

In FIG. 1, two peeling wires 6, 6 are stretched parallel to each other in the die portion 1a of the extrusion molding machine 1 so as to cross the upper and lower sides of the extrusion opening surface, respectively. The peeling wire 6 is made of, for example, a piano wire, a PC steel wire, etc., and its fixed structure at both ends is such that one end is locked by a suitable pin 6a and the other end is stretched by a wing nut 8.

Another feature of the method of the present invention is the molding raw material. That is, the coarse raw material 3 having a relatively coarse particle size of about 5 to 25 meshes is mixed as an auxiliary material into the molding raw material used in the method of the present invention.

In the method of the present invention, the above-mentioned forming raw material is loaded into the extrusion molding machine 1 and extruded under pressure into a block shape, and at the same time, the peeling line 6 is connected to the forming starting end of the green material 2 that is being formed. It bites into the upper and lower portions of the surface 2d and cuts the skin portions 2c and 2c on the upper and lower surfaces of the green molded material 2 so as to peel them off.

By the way, in the wet molding method, the moisture content of the extrudable green material is generally 20 to 25%, and the extrusion pressure is 15 to 20%.
kgf/a (accordingly, the above-mentioned beer uA
The diameter dimension of No. 6 is set to approximately 0.3 to 0.7 so as not to break in a short period of time under the above-mentioned wet molding conditions and not to exceed the load limit of cutting resistance. Also,
The tension is also approximately 1.5 to 2.0 for the same reason.
It is said to be within the numerical range of kg/aJ.

Moreover, the particle size of the coarse grain raw material 3 is within a size range that can be locked at the time of cutting with respect to the diameter of the peeling wire 6. The trajectory is larger than the size that can be visually judged from a design perspective, and smaller than the size that does not cause baking cracks when the green molded material 2 is fired. Therefore, the value that satisfies all of these conditions is approximately 5 to 25 meshes.

By defining the ranges of the various numerical values in this way, the coarse grains on the planned cutting surface of the peeling line 6 out of the coarse grain raw material 3, which is the main material contained in the green material 2 being cut, are The movement of the raw material 3 is temporarily stopped or delayed by the peeling line 6. As a result, on both surfaces of the green material 2' from which the upper and lower surface skin parts 2c and 2c have been cut and peeled off, there is a trajectory in which the coarse grain raw material 3, which is the rigid material, is reduced into the fine grain raw material 4, which is the main material. is engraved, thereby drawing the flow pattern 5.

FIG. 2 shows a perspective view of the present molded material, in which the molded material 2' obtained by the above-mentioned method of the present invention is subjected to drying, firing and other various steps. It will change over time. On the surface of this molded material, the flow pattern 5 as described above is depicted as being scattered in an unspecified manner.

Here, various numerical values will be listed for the examples carried out by the present inventors.

〔Example〕

The mixing ratio of the forming raw materials is, first, 40 to 50 wt% of feldspar.
In addition, the clay content is within each numerical range of 50 to 60 wt%, and the total mixture is 100 wt%, and this is used as fine grain raw material 4 (see 1st FgJ).

Next, the fine grain raw material R4 is set to 80 wt%, and a coarse grain raw material 3 consisting of chamotte and sand having a grain size of 5 to 25 mesos.
(See Figure 1) is added at 20 wt % so that the total mixture of raw materials becomes 100 wt %, and this is used as a raw material mixture.

Furthermore, the raw material mixture was adjusted to 80 wt%, and 20 wt% of water was added to this.
wt% is added and kneaded to obtain a molding raw material of the present invention whose kneaded total amount is 100 wt%.

The moisture content of the molding raw material obtained as described above was approximately 20 to 25%.

The extrusion pressure of the molding raw material was 15 kgf/cd, the diameter of the peeling wire 6 was 0.5fi, and the tension of the peeling wire 6 was 2.0 kgf/-.

Then, the molded green material obtained by the extrusion was
After drying at 1250°C for 35 hours, it was glazed and then fired at 1250°C for 40 hours.

The outer dimensions of the thus obtained molded material (tile after division) are as follows: the short side is 60ts, and the long side is 3001s.
1 m, and the thickness was 12 m. The unit flow pattern formed on the surface of the molded material has a length of about 6 to
It was 10m long and about 1-3fi deep.

In addition, according to the experimental data conducted by the present inventors, it was found that as the diameter of the beering line 6 becomes larger, the formation depth of the unit sinking pattern also becomes larger.

Furthermore, it was found that as the particle size of the coarse raw material 3 becomes coarser, the shape growth and depth of the unit flow pattern become larger, and as the particle size becomes finer, it becomes smaller. but,
It is difficult to generally define the formation tendency of such flow patterns, and it can be said that these are merely the results of statistical experiments. Therefore, when the method of the present invention is carried out by variously changing the particle size of the coarse raw material 3, the diameter and tension of the beering wire 6, the extrusion pressure of the molding raw material, etc., the variegation field becomes rich. Therefore, a molded material with a novel surface design can be obtained.

3rd FI! J is a perspective view showing another embodiment of the molded material obtained by the method of the present invention, and the molded material is a nosing tile used for stairs and the like. As shown in FIG. 4, the molded material shown in the same figure has one of the fixed ends 6a, 6a supporting both ends of a single beeling wire 6 attached at different heights. Alternatively, it can be easily formed by simply stretching the two peeling lines 6, 6 in a diagonal manner. As described above, the detailed structure and shape of the method of the present invention and the molding material of the present invention can be changed as appropriate depending on the mode of implementation, and of course, the molding material may be other than chive split tiles.

As is clear from the above description, according to the method for forming a flow pattern on a green molded material according to the present invention and the ceramic block-shaped molded material obtained by the method, on the surface of the molded material,
Since the flow pattern of the coarse-grained raw material is depicted as being scattered in an unspecified manner, a molded material with an aesthetically designed surface can be obtained.

In addition, since the scattering pattern of the flow pattern changes depending on the crosstalk state of the forming raw material each time,
No two molded materials are formed with exactly the same pattern. but,
The flow pattern is summarized by a unique, unified aesthetic personality, which arouses a sense of beauty in those who view it. In other words, this molded material does not give the impression of lacking individuality, which is the case with mass-produced products made through general assembly-line operations, and gives a high-class feel, as if each item were custom-made by hand. Moreover, to form it, it is very simple as all you need to do is to stretch a beer wire at the exit of the die section of the extrusion molding machine. No special work is required (and no extra effort is required compared to the conventional method. Also, by slightly bending the beading line during extrusion, a wavy pattern is formed on the surface of the molded material. If conventionally known methods are carried out at the same time, a completely new surface pattern that has never existed before can be formed.Furthermore, the flow pattern as described above is formed as the coarse grained raw material is reduced into the fine grained raw material. Therefore, a plurality of raised pieces of the coarse-grained raw material are formed on the unit peripheral surface of the flow pattern.Therefore, when viewed as a whole, the surface has a rough shape with countless raised pieces protruding. When applied to flooring, it also has the advantage of being hard to slip.

[Brief explanation of drawings]

Figure 2 is a schematic perspective view showing the outlet of the die part of the extrusion molding machine used in this method, Figure 2 is a perspective view showing the molded material, and Figure 3 is a perspective view showing another embodiment of the molded material. FIG. 4 is a schematic perspective view showing the exit of the die section of the extrusion molding machine for forming the present molded material in FIG. 3; 1... Extrusion molding machine 1a... Die part 2... Molding raw material 2a... Indexing surface 3... Coarse grain raw material 4...
・Fine raw material 5... Flow pattern 6... Peeling line Figure 2 Figure 3

Claims (1)

[Scope of Claims] 1. A fine-grain raw material as a main material and a coarse-grain raw material as an auxiliary material are uniformly distributed in an extrusion molding machine in which a peeling line for removing the skin layer of the extrusion-molded raw material is stretched over the outlet of the die part. Loading and extruding the kneaded forming raw material so that it is distributed in the shape of the molding material, and drawing a flow pattern on the cut surface of the green molded material due to movement resistance caused by the coarse raw material being caught on the peeling line during extrusion. A method for forming a flow pattern on a molded raw material, characterized by: 2. A ceramic block-shaped molded material, characterized in that a flow pattern due to coarse raw materials mixed in the molding raw material is drawn on the surface of the ceramic block-shaped molded material so as to appear scattered in an unspecified manner.