JP2874142B2 - Method of patterning irregularities on ceramic plate - 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 pattern on a ceramic board.

[0002]

2. Description of the Related Art In the past, inorganic plate materials formed of fiber-reinforced cement or the like have been widely used as wall plates. If this kind of outer wall plate material is as it is, the ground color is white gray ~
In addition to being a black-gray achromatic color, if it is simply a flat plate, there is a problem that the design of the exterior wall plate is poor. For this reason, various irregularities are provided on the surface to enhance the decorativeness.

[0003] As a means for imparting an uneven pattern to the surface of the ceramic wallboard, an uncured molded article formed by extrusion or the like is supplied to a press platen, and the surface uneven pattern is pressed one by one and simultaneously with the sheet thickness. In a press method to adjust the surface, a roll press method to apply a concavo-convex pattern to the surface of an uncured molded plate by a roll press or an extrusion method, a concavo-convex pattern roll is built in the molding die, and the concavo-convex pattern is applied to the surface simultaneously with extrusion. There are known methods.

[0004]

However, in the above-mentioned patterning method, the pressing method has general versatility which can be applied to any forming method regardless of the method of manufacturing a ceramic plate.
Processing becomes a batch system for each sheet, and productivity is poor,
In addition, when a deep uneven pattern is attached, the air is trapped in the concave surface of the mold, so that a deep and sharp uneven pattern cannot be formed, or the linearity of the uneven pattern is impaired due to the trapped air and brick-like joints etc. There was a drawback that an uneven pattern could not be accurately formed.

[0005] The following roll pressing method is advantageous in terms of continuous productivity, but when forming a deep uneven pattern, the convex part of the mold causes interference with the concave surface of the surface of the molded plate, and the uneven pattern is broken. There is a problem that it is not possible to form a very deep uneven pattern.

The method of pressing simultaneously in the third forming die has the advantage of good formability since the pressing is performed in the die, but it is basically impossible to provide a very deep uneven pattern as in the roll pressing method. In addition to the drawback that it is difficult, the base must have a complicated structure, and therefore, when a small number of different uneven patterns are produced in many kinds, the equipment becomes very expensive.

[0007]

DISCLOSURE OF THE INVENTION In view of the above problems, the present invention provides a method for forming an uneven pattern on the surface of an uncured ceramic plate, which can be reliably and accurately applied even to a deep uneven pattern. Moreover, it is an object of the present invention to provide a method of forming an uneven pattern on the surface of a ceramic plate material which can provide the uneven pattern with high productivity.

[0008]

That is, according to the method of the present invention for forming a textured pattern on the surface of a ceramic plate, a ceramic plate extruded in a plate shape is received on a pallet, and the pallet is synchronized with the extrusion speed. In the transfer process, a plate-shaped mold having a surface irregular pattern is brought into contact with the ceramic plate material surface in the transfer process,
It is characterized in that the linear pressure is gradually increased by a roll from the back of the plate-shaped mold and pressed to form an uneven pattern on the surface of the ceramic plate and adjust the plate thickness.

[0009]

In the method of the present invention, the uncured ceramic plate is transferred to a pallet after extrusion molding, so that deformation after shaping is prevented. In the transfer process using the pallet, the plate-shaped mold is brought into contact with the surface of the ceramic plate and the linear pressure is gradually increased by the roll from the back of the plate-shaped mold. The air interposed between the surface and the surface of the ceramic plate is gradually discharged and finally has almost no effect. Even in the case of a deep uneven pattern, it is formed with good linearity without biting air. At this time, the plate pressure of the ceramic plate is also regulated by the press pressure.
Then, at the time of mold release, the mold can be released from the surface of the ceramic plate-like body almost in a horizontal posture, so that even a deep uneven pattern can be attached without causing interference.

[0010]

Next, an embodiment of the present invention will be described. FIG. 1 is a side view showing an apparatus for carrying out the method of the present invention, and FIG. 2 is a front view of a die showing a plate-shaped die used in the method of the present invention.

[Example 1] A plate 1 having a thickness of 10 mm and a width of 45 cm is extruded with a fiber reinforced cement by an extrusion molding apparatus 2 and received on a pallet 3 immediately after being discharged from a molding die 2A. The pallet 3 was transported by a roll conveyor 4 at a speed synchronized with the extrusion speed, and in this transport process, the plate-shaped mold 5 having the surface uneven pattern 5A shown in FIG. The concavo-convex pattern of the plate-shaped mold 5 had a brick-like joint pattern, and the concavo-convex pattern had a difference of 4 mm.

Then, rolls 6... 6 are brought into contact with the back surface 5B of the plate-shaped mold 5 and the linear pressure of each roll 6. At the same time, it was formed so that the plate thickness became 9 mm. In the drawing, reference numeral 7 denotes a backup plate which is in contact with the rolls 6 to disperse the pressure, and is inserted as necessary.
After that, the plate-like body 1 having an uneven pattern on the surface was cut into pallets, transferred to a curing step, and cured and cured.

[Embodiment 2] As shown in FIG. 3, a plate member having an uneven surface pattern was formed in the same manner as in Embodiment 1 except that a caterpillar conveyor 4A was used as a conveyor for transferring a pallet 3. In FIG. 3, reference numeral 4A 'denotes a support bed of the caterpillar conveyor 4A.

[Embodiment 3] As shown in FIG. 4, a plate material having an uneven surface pattern is used in the same manner as in Embodiment 1 except that a moving board 4B having a pallet delivery function is used as a conveyor for transferring the pallets 3. Formed. In FIG. 4, reference numeral 4B 'denotes a cylinder device for moving the movable platen 4B up and down.

COMPARATIVE EXAMPLE As a comparative example, a brick-like joint pattern having an unevenness of 4 mm was applied by a roll press, and thereafter the plate was cured and cured in the same manner as in the above example.

Observation of the state of the surface unevenness pattern of the example and the comparative example revealed that in the case of the example, a deep and sharp unevenness pattern having good linearity was provided. It was observed that an abutment surface due to interference was formed in the concave joint portion in a direction parallel to the axis, resulting in a concave groove lacking sharpness.

[0017]

As described above, according to the method of the present invention, a plate-shaped mold is used for forming an uneven pattern on the surface of a ceramic plate, and this mold is gradually pressed by a roll over multiple stages. The air interposed during the pressure contact process is discharged without difficulty, and the harm caused by the air entrapment is reliably prevented, and the chipping due to the interference of the concave and convex molds can be prevented even when releasing the mold, so that the linearity is deep and sharp. An uneven pattern can be provided. Further, when carrying out the method of the present invention, the plate-shaped mold may be supplied on a conventional transfer device, so that it is easy to carry out, and the production of a ceramic-based plate having an uneven pattern can be continuously and easily produced. It has the effect that it becomes possible.

[Brief description of the drawings]

FIG. 1 is a side view of an apparatus for performing the method of the present invention.

FIG. 2 is a front view of a plate-shaped mold used in the method of the present invention.

FIG. 3 is a side view of another embodiment.

FIG. 4 is a side view of still another embodiment device.

[Description of Signs] 1 ... plate-like body 2 ... extrusion molding apparatus 2A ... molding die 3 ... pallet 4 ... roll conveyor 5 ... plate-like mold 5A ... surface irregular pattern mold 5B ... backside 6 ... roll 7 ... back-up plate

Claims (1)

(57) [Claims] 1. A ceramic plate extruded in a plate shape is received on a pallet, and the pallet is transferred at a speed synchronized with an extrusion speed. In the transferring process, the surface of the ceramic plate has an irregular pattern. Abutting the plate-shaped mold, gradually increasing the linear pressure by a roll from the back of the plate-shaped mold and pressing the plate-shaped mold, forming an uneven pattern on the surface of the ceramic-based plate material and adjusting the plate thickness; A method of patterning irregularities on the surface of a board.