JPH0516117A - Concavo-convex patterning method for inorganic extruded building materials - Google Patents

Abstract

(57) [Summary] [Purpose] An object of the present invention is to provide a method for patterning an inorganic extruded building material that has a sharp shape and can be very easily patterned. [Structure] A gelation-promoting liquid agent containing an additive for lowering the gelation temperature is uniformly sprayed or applied on the surface of the extruded molded product, and the molded product is heated to the gelling temperature and then applied to the surface. It consists of a step of giving a concavo-convex pattern by pressing, and prevents the material from flowing away due to the press pressure by gelating the surface, and gives a concavo-convex pattern excellent in sharp linearity.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a method for forming an uneven pattern on an extruded inorganic building material.

[0002]

2. Description of the Related Art Heretofore, as a means for producing an inorganic building material molded from a cement mixture, an extrusion molding method has been known in which an inorganic kneaded material is extruded and molded. This extrusion molding method has an advantage that it is suitable for mass production of decorative wall plates because it can continuously mold any number of projections and depressions that are continuous in the extrusion direction. However, since this extrusion molding method cannot form an uneven pattern in a direction that is not continuous in the extrusion direction,
When applying such an uneven pattern, press the uneven pattern forming roll on the surface of the uncured molded product immediately after being discharged from the extruder, or once receive the molded product on the template, For example, the surface of the uncured molded product is pressed with a concavo-convex patterning roll, and the molded plate is once cured and cured, and then the surface is ground to give a concavo-convex pattern.

[0003]

However, in the case of the first and the second uneven pattern forming roll means among the means for providing the uneven pattern which is not continuous in the extrusion direction, the protruding portion for forming the uneven pattern is used. There is a problem that the corners of the uneven pattern will be rounded due to the galling interference and it is difficult to form a sharp pattern, and the uncured molded product still has fluidity, so the contact area of the uneven type when pressing the roll Due to the difference, the phenomenon of partial escape of the material occurs, the uneven pattern is distorted, and in the case of a brick-like uneven pattern, the linearity of the pattern does not appear. Further, in the case of the means for grinding treatment of the third curing and hardening plate, there is no problem described above, but there is a drawback that it takes a lot of time and labor to process a hardened molded product.

In order to eliminate such a defect, a press board may be pressed against the surface of the uncured molded plate to form an uneven pattern at once, but since the material has plasticity due to an extrusion aid such as methylcellulose, it is pressed. At times, there is a problem that "escape" occurs due to the fluidity of the material, making it difficult to make sharper patterns.

[0005]

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a method for patterning an inorganic extruded building material that has a sharp shape and can be very easily patterned. It was made.

[0006]

Means for Solving the Problems That is, the method for patterning unevenness of an inorganic extruded building material of the present invention is to uniformly disperse a gelling promoting liquid agent containing an additive for lowering the gelling temperature on the surface of an extruded product. Alternatively, it is characterized in that it is supplied by coating, the molded body is heated to the gelling temperature, and then an uneven pattern is formed on the surface by pressing.

[0007]

In the present invention, the extrusion-molded cement compound used may be any compound as long as the properties of the extrusion-molding material are not contradictory, and methylcellulose or the like is added as an extrusion aid. Is used.

The inorganic kneaded material containing the extrusion aid is extruded into a plate shape, and then a gelling promoting liquid agent containing an additive for lowering the gelation temperature is uniformly dispersed on the surface of the formed plate or If supplied by application and heated to a gelling temperature, the gelling liquid agent sprayed or applied to the surface by this heat promotes gelation of HC contained in the molded body, so the press pressure does not escape and is received. And, a concavo-convex pattern with a sharp shape is attached. Further, the surface of the molded product gels, so the mold can be easily released. Additives that lower the gelation temperature of HC and promote gelation include sodium chloride, sodium hydroxide, sodium sulfide, sodium carbonate, aluminum sulfate, ferric chloride, magnesium chloride, water glass and the like. In the above, the time of heating to the gelling temperature may be before or after the application of the gelling promoting liquid agent.

Next, an embodiment of the present invention will be described. Example: An inorganic compound 1 containing 43% by weight of cement, 43% by weight of silica, 7% by weight of pulp fiber and 7% by weight of lightweight aggregate 1
1.0% by weight of methylcellulose, relative to 00% by weight,
And 40% by weight of water are added and sufficiently kneaded and supplied to an extruder to extrude a molding plate having a thickness of 2 cm, a width of 20 cm and a length of 40 cm,
Next, an additive for lowering the gelling temperature as a liquid agent that accelerates thermal gelation on the surface of the molded plate is added to the molded product blending,
3% by weight of each was added in an external proportion, and the surface was heated until it gelled and the temperature was measured. The results are shown in the right column of Table 1. Then, it was pressed with a press board at 2 kg / cm ² to form a brick-like joint pattern having a depth of 4 mm. When the surface of the formed plate after pressing was observed, it was confirmed that the joint pattern with sharp corners was formed clearly.

COMPARATIVE EXAMPLE An inorganic kneaded material having the same composition as that of the example was extruded in the same manner as in the example, and the methylcellulose compounded in the inorganic kneaded material was gelated only by heating without spraying the liquid agent which gelated on the surface. Made into The temperature at this time was as shown in the bottom column of Table 1. Then, when a concavo-convex pattern was formed by pressing in the same manner as in the example, the corners of the concavo-convex part were considerably sharp, but the joint pattern was slightly distorted as a whole.

[0011]

[Table 1]

As is clear from Table 1, the gelling temperature is 27 ° C. at the maximum and about 13 ° C. on the average as compared with the case where no additive is added, and the gelling temperature can be lowered to form a sharp uneven pattern. found.

[0013]

As described above, according to the present invention, if a gelling agent is sprayed or applied on the surface of an extruded product and heated at a low temperature, the surface is gelated and an uneven pattern is easily formed by pressing. It is possible to prevent the deviation of the pattern due to the fluidity of the material, and it is possible to form a concavo-convex pattern having a sharp shape.

Claims (1)

Claim: What is claimed is: 1. A gelation-promoting liquid agent containing an additive for lowering the gelation temperature is uniformly sprayed or applied onto the surface of an extrusion-molded product to form the gelled product. A method for imparting an uneven pattern to an inorganic extruded building material, which comprises heating to a temperature and then applying an uneven pattern to the surface by pressing.