JPH0269206A - Method for embossing projecting and recessed pattern on inorganic sheet - Google Patents

Abstract

PURPOSE:To make it possible to perform embossing at high speed even on inorganic sheet material, the shape retention of which can not expect, by a method wherein an embossing roll, which has peripherally continuous projecting and recessed pattern, is urged on the surface of a band-like inorganic sheet, which is made of cement stock and continuously produced in the form of the sheet, and rotated synchronously with the production speed of the sheet. CONSTITUTION:Band-like sheet is continuously produced by so-called dry method. Projecting and recessed pattern is embossed on the surface of the sheet with an embossing roll 2 having peripherally continuous projecting and recessed stripes 1...1. After that, the sheet is cut at intervals, each of which is equal to the width (b) of a produced item, and cured. Further, when projecting and recessed stripes, which are continuous in the width direction of the produced item, is intended to be embossed, the width S of the band-like sheet A, which is continuously produced in the form of the sheet, is made to be equal to the longitudinal length (l) of the produced item and the band-like sheet A may well be cut at pitches, each of which is equal to the width B of the produced item.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a method for forming an uneven pattern on an inorganic plate.

(Prior Art) Conventionally, when manufacturing boards for construction using fiber-reinforced cement boards, etc., a textured pattern is often applied using a textured roll or the like in order to enhance the surface decoration effect of these boards.

As shown in Fig. 2, these uneven patterns are applied to a continuously formed aluminium-free board using a mold roll B, which has an uneven pattern continuous in the axial direction. Usually, the product is cut into lengths e.

[Problems with conventional technology]

However, when the above-mentioned uneven patterning method is used, there is no problem while the production speed is slow, but when the production speed is increased, the plate material stretches in the opposite direction to the direction of travel (arrow X) when pressurized by the patterning roll. There was a drawback that this caused defects such as cracks in the product.

Furthermore, these drawbacks become even more pronounced in cement board materials containing asbestos, which have been strongly demanded in recent years, because the excellent shape retention of asbestos cannot be expected.

(Problem to be Solved by the Invention 3) In view of the above-mentioned drawbacks, this invention enables high-speed molding without causing defects, even for inorganic board materials that are asbestos-free and cannot be expected to have sufficient shape retention. The purpose of this invention is to provide a method for forming an uneven pattern on an inorganic plate.

[Technology that led to solving the problem]

That is, the method of providing an uneven pattern on an inorganic board according to the present invention is to form a strip-like pattern made of cement bases 1' and 21 that are continuously formed.
Type 1 with a concave and convex pattern that continues in the surface direction of the hostage board
It is characterized in that a concave and convex pattern is created continuously by pressing the rolls together and rotating them by the same amount.

[Function] When the plate material that is continuously formed and supplied is compressed with a roll, ■" (with some degree difference in the traveling direction of the plate material: hj
Rolling of the plate material in the opposite direction L occurs.

Therefore 1. When the L roll is provided with uneven stripes parallel to the axial direction, the above-mentioned rolling becomes even more pronounced because there is no slippage between the roll surface and the surface of the plate material to be compressed.

Therefore, in the present invention, as shown in FIG. 1, the uneven strips 1...1 are provided continuously in the circumferential direction of the forming roll 2 to prevent the above-mentioned rolling as much as possible.

In addition, when adding continuous uneven stripes in the width direction of the molded product,
As is clear from the comparison with Fig. 2, the strip 1 is continuously formed.
The width S of fiA is made equal to the vertical length β of the molded product, and one shakuhachi strip is cut at a pitch equal to the width of the molded product.

〔Example〕

Next, the present invention will be explained in detail.

A band-shaped plate with a width of 90 cm is continuously formed by a so-called dry method, and as shown in FIG. 1, an uneven pattern is applied to the surface using a mold roll 2 having uneven stripes 1...1 continuous in the circumferential direction. The dirt was cut into pieces at intervals of 45 cm equal to the width of the molded product, and the pieces were cured to obtain test pieces.

[Comparative example]

A strip plate with a width of 45 cm is continuously formed by a so-called dry method, and as shown in Fig. 2, an uneven pattern is applied to the surface using a mold roll B with continuous uneven stripes in the axial direction. The specimens were cut at intervals of 90 cm equal to the length β to obtain test specimens having the same appearance as those of the examples.

Bending strength in the longitudinal direction (kg
/cI11) and deflection (mm), the results are shown in the table below.

77 times [Effects] As explained above, this invention has the effect that by simply changing the continuous direction of the uneven pattern, the strength can be improved if production is performed at the same speed, and the production speed can be improved if the strength is the same. have

[Brief explanation of the drawing]

FIG. 1 is a plan view of an embodiment of the present invention, and FIG. 2 is a 'F side view of a conventional example.

Claims (1)

[Claims] (1) A patterning roll having a continuous uneven pattern in the circumferential direction is press-contacted to the surface of a band-shaped inorganic plate made of cement raw material and rotated synchronously to continuously form an uneven pattern. A method for forming an uneven pattern on an inorganic board, which is characterized by: