JPH085053B2 - Method for forming uneven patterns on inorganic extruded building materials - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a method for forming an uneven pattern on an inorganic extruded building material.

[Conventional technology]

BACKGROUND ART So-called extruded building materials have heretofore been widely known, in which an inorganic raw material made of a cement mixture is extrusion-molded into a predetermined cross-sectional shape by an extruder, and this is cured and cured to obtain a product.

Even if the extruded building material is a product having a considerably complicated cross-sectional shape, continuous molding is possible as long as unevenness is continuous in the extrusion direction, and it is effective as a molding means for mass-consumed materials.

However, in this extruded building material, if the surface is provided with a concavo-convex pattern that crosses vertically and horizontally for brick building, for example, it is necessary to add a laterally running joint to the surface of the extruded product immediately after extrusion by a roll or a press machine. .

[Problems of conventional technology]

However, when the laterally running joint is applied by roll or press, the molded product immediately after extrusion molding is considerably rich in plasticity, so that the material is compressed and rolled by the press pressure to generate a flow, which causes a problem that the contour of the pattern and the contour of the molded product collapse. there were.

Therefore, it is very difficult to provide the above-mentioned laterally running joints which are not continuous in the extrusion direction by the extrusion molding method.

[Problems to be Solved by the Invention]

In view of the above problems, the present invention provides a method for forming an uneven pattern on an inorganic extruded building material that can be easily attached to the surface of an extruded product even if it has an uneven pattern that continues vertically and horizontally such as a brickwork pattern. It was made for the purpose of providing.

[Technology that has solved the problem]

That is, the method for imparting a concave-convex pattern to an inorganic extruded building material of the present invention is to uniformly supply super-fast-hardening cement to the surface of the molded body immediately after extrusion molding the inorganic raw material consisting of a cement mixture into a product having a predetermined cross-sectional shape by an extruder, It is characterized in that the surface of the supply is provided with a surface irregular pattern by pressing.

[Action]

In this invention, immediately after extrusion molding an inorganic raw material consisting of a cement mixture into a product having a predetermined cross-sectional shape by an extruder, the super-hardening cement is uniformly sprayed and supplied to the surface of the molded product surface hardness. This is because the fluidity of the material due to the uneven press immediately after is raised quickly.

Therefore, even a molded article having a high degree of plasticity has a sufficiently high surface hardness, so that the material does not flow and a sharp uneven pattern is formed.

〔Example〕

 Next, an embodiment of the present invention will be described.

FIG. 1 is a side view showing an example of an apparatus for carrying out the method of the present invention.

Cement mixture 1 consisting of cement, siliceous raw material, calcareous raw material, lightweight aggregate, reinforcing fiber and necessary amount of water is extruded from extruder 2 into a plate having a width of 30 cm and a thickness of 2 cm and extruded immediately after extrusion. On the surface of the molded article G, super rapid hardening cement 3 (for example, Onoda Cement Co., Ltd .: trade name jet cement) with a setting time of 15 minutes is sprayed with a spraying device so as to have a layer thickness of 50 to 100 μm, and then has a brick-like vertical and horizontal uneven pattern An uneven pattern was applied on the uneven press board 4.

At this time, the depth of the uneven pattern is 5 mm, and the width of the uneven groove is 10 m.
m, uneven pitch is 5 cm for horizontal joints, 10 for vertical joints
cm, and the pressing pressure was 10 to 30 kg / cm ² .

When observing the surface shape of the product after uneven pressing, vertical and horizontal joints have clear contours and a certain depth, and the rolling expansion of the molded product in the width direction due to press compression is within 1 mm, and there is almost no problem in product accuracy. There wasn't.

As a comparative example, when a press pattern was applied under the same conditions as above without spraying ultra-rapid hard cement, rolling expansion in the width direction of the contour of the molded product by press compression was 5 to 10 mm, and considerable deformation was observed in an indefinite state. In addition, the vertical and horizontal joint patterns were partially broken, and this part was unsuitable for commercialization.

〔effect〕

As described above, according to the method of the present invention, while being an extruded building material, when performing patterned pressing, the surface hardness is increased by the super-rapid hardening cement spraying, so excessive deformation is prevented even when pressed by the press platen. Therefore, even if the pattern of protrusions and recesses is not continuous in the extrusion direction, it is possible to form the product clearly and at a constant depth without breaking the contour shape of the product.

Further, when the method of the present invention is carried out, since it is only necessary to add a device for spraying the ultra-rapid hardening cement to the surface of the extruded product, there is an effect that the method is easy to carry out.

[Brief description of drawings]

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

Claims (1)

[Claims] 1. Immediately after extrusion molding an inorganic raw material made of a cement mixture into a product having a predetermined cross-sectional shape by an extruder, ultra-fast hardening cement is uniformly supplied to the surface of the molded body, and a surface uneven pattern is formed on the supplied surface by pressing. A method for applying an uneven pattern to an inorganic extruded building material, which comprises applying.