JPH106326A - Roofing material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a flat roofing material enhanced in positioning accuracy at a time of punching and not generating the positional shift of surface patterns or small crack grooves. SOLUTION: A high density part (e.g.; a small crack groove 3a of a side end part) is molded to one side end part of a product material 1 before primary ageing larger than a final product shape and, after primary ageing, the product material is positioned by setting the high density side end part to a reference surface and punched to obtain the final product shape. When positioning is performed,,a pair of left and right pressure cylinders 4a,4b different in acting pressure are used and the pressure cylinder 4a having higher acting pressure is set on the side of the side end part being the high density part to hold the punched material along with the pressure cylinder 4b to press both side end parts of the punched material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a roofing material from a raw cement sheet, and more particularly, to an improvement in positioning accuracy when a flat roofing material is punched from a mat body or a semi-hardened plate body. The present invention relates to a method for manufacturing a roofing material.

[0002]

2. Description of the Related Art Conventionally, in order to manufacture a flat roof material, for example, as described in Japanese Patent Application Laid-Open No. 4-44805, a roll cutter is used while a belt-shaped raw cement sheet is conveyed by a belt conveyor. Cut according to a predetermined cutting line to obtain a product material having a size larger than the final product shape, after primary curing this product material, press-punching the final product shape, and finally curing the punched product. To obtain a flat roof material as a product.

[0003]

On the surface of a product material having a size larger than the shape of the final product, a small groove or other surface pattern is pressed and formed by a press, and this is subjected to primary curing to form the final product shape. When press punching is performed, positioning (positioning with a press punching machine) is not easy, and much time is required for positioning. If punching is performed with insufficient positioning, the position of the surface pattern on the surface of the roofing material will not be constant, leading to a deterioration in design. In particular, when manufacturing a flat roofing material having a sub-groove formed at the side end, if the positioning is not constant, the groove width of the sub-groove will be uneven, and when the roof is roofed, the sub-groove with a different groove width will be used. Since the grooves appear on the roof surface, the appearance is bad. In an extreme case, it is possible that a small groove which should be originally formed in the side end portion is not formed.

[0004] In particular, when manufacturing a large and long flat roofing material having a large width dimension, the expansion and contraction of the surface pattern generated due to the curing conditions, the curing state, and the like during the primary curing are accumulated, and the dimensional change is large. In other words, in the conventional method, it is more difficult to punch at an intended position.

[0005] It is an object of the present invention to provide a primary curing of a product material cut to a size larger than the final product size, press-cutting the material into a final product shape, and final curing.
In a method of manufacturing a flat roof material as a product, it is an object of the present invention to provide a method of manufacturing a roof material that eliminates the inconvenience of alignment at the time of punching, and more specifically, press-molds with a press before primary curing. The position of the finished surface pattern on the surface of the final product, and particularly, the width of the small groove formed at the side end, can be punched as always constant, thereby causing a deterioration in design. It is another object of the present invention to provide a method for manufacturing a roofing material, which does not cause deterioration in appearance when roofing.

[0006]

Means for Solving the Problems The present invention has been obtained by conducting various studies in order to solve the above-mentioned problems. Basically, the method for producing a roofing material according to the present invention is intended for use in a final product. The high-density portion is pressed and formed on at least one end of the product material before the primary curing larger than the shape, and after the product material after the pressure molding is primarily cured, the high-density side end portion is positioned with respect to the reference surface. And a step of punching into a final product shape. Preferably, the high-density portion is a small groove at an end of a roof material as a final product.

In the present invention, more preferably, when positioning is performed, a pair of left and right pressing cylinders having different working pressures are used, and the pressing cylinder having a higher working pressure is used as the high-density side end portion. The product material after the primary curing is positioned by being sandwiched between the pair of left and right pressing cylinders and pressing both side ends.

According to the manufacturing method of the present invention, a high-density portion, preferably in the form of a small groove, is pressed and formed on at least one side end of the product material before the primary curing, and the primary curing causes the other portion to be formed. More solidified. At the time of press punching, if the positioning is performed with the high-density side end side as the reference plane, the reference plane is prevented from being compressed and deformed or damaged, and the reference plane at the time of punching changes for each roof material. It does not happen. Thereby, the position of each pattern from the reference surface on the surface of the roofing material becomes substantially constant, and when the high-density portion is a small groove, the small groove at the side end as a final product Can always have a constant width dimension. Therefore, the roofing material obtained by the production method of the present invention is excellent in design properties, and the design properties are not deteriorated at the time of roofing.

In particular, when a pair of right and left pressing cylinders having different working pressures are used for positioning, the pressing cylinder having the higher working pressure is used as the high-density side end. By doing so, the roof material can be easily aligned with the high-density side end side of the roof material on the positioning reference line on the press-punching device side, and the punching operation becomes easier and more reliable.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail based on preferred embodiments. FIG. 1 shows a part of a manufacturing process of a roofing material by a manufacturing method according to the present invention. FIG. 1 (a) shows a paper-made dehydration molding of a slurry composed of cement, silica sand, valp or the like to obtain a band-like mat body (raw plate) or a semi-cured plate body. 1 shows a product material 1 as an intermediate product which is slightly larger than the final product to be obtained and is roughly cut by an appropriate cutting means. The process up to obtaining the product material 1 may be any of the conventionally known methods for manufacturing a flat roof material, and a detailed description thereof will be omitted.

An appropriate surface pattern 2 and a small groove 3 are formed on the surface of the obtained product material 1 by a conventionally known pressing means.
Is molded. In the present invention, in particular, on one side end, a small split groove 3a wider than the small split groove 3 formed by pressing on the surface is formed by pressing with the side end opened,
The portion is a portion having a higher density than a portion that is not pressed (FIG. 1B).

Next, the press-formed product material 1 is primarily cured. The primary curing conditions may be the same as those of the conventional method, and it is desirable to cure at room temperature or under relatively low temperature conditions of 50 ° C. or less. This is because, when steam curing is performed at 50 ° C. or more, efflorescence is likely to be generated on the surface of the product material, and even at a temperature of 50 ° C. or more, drying of the end of the product material proceeds, making it difficult to produce a uniform product. It depends.

Next, as shown in FIG. 1C, the product material 1 after the primary curing is set on a platen of a press punching machine. On the left and right sides of the surface plate, a pair of left and right pressing cylinders 4a and 4b having different working pressures (where the pressing cylinder 4a is designed to exert a higher working pressure than the pressing cylinder 4b) are arranged. Cured product material 1
Are set between the pressing cylinders such that both end portions thereof face the working plate end surfaces 5a and 5b of the pressing cylinders 4a and 4b. However, the end on the side where the wide small groove 3a which is the high-density portion of the product material 1 is formed is located on the side of the pressing cylinder 4a which generates a large working pressure. In FIG. 1C, reference numerals 6a and 6b denote pins provided to stabilize the vertical posture of the roofing material.

In this state, a hydraulic mechanism (not shown) is operated to supply hydraulic oil to the pair of pressing cylinders 4a and 4b. Then, the working plate end surface 5a of the high pressure side pressing cylinder 4a is moved until it reaches a predetermined reference position on the surface plate, and the supply of hydraulic oil to the pressing cylinder is stopped at that position by a control mechanism (not shown). , Pressing cylinder 4a
To stop. By the movement of the pair of pressing cylinders 4a and 4b, both end surfaces of the product material 1 are pressed cylinder 4a,
4b is held between the end faces 5a and 5b of the operation plate (the state shown in FIG. 1 (c)).
Is larger than the pressure of the pressing cylinder 4b, the product material 1 gradually moves leftward in FIG. 1 (c), and the pressing cylinder 4a reaches the specified position on the surface plate. Stop at the place. The position is the specified punching position of the material to be cut (product material 1) in this press punching apparatus, and in this state, a cutting blade (not shown) punches the final product shape.

In this process, the small groove 3a formed at the right end in the drawing is pressed with a strong pressing force by the working end face 5a of the pressing cylinder 4a, but is a mat body or a semi-cured plate body. Since the pressed portion of the product material 1 is a high-density portion, the portion is not crushed, deformed, or damaged. In addition, the small groove 3
a is made wider than the other small grooves 3 and
Since the strong pressing force side is used as the reference plane, the deviation of the cutting cut position in the small groove 3a is very small, and the small groove 3 is reliably cut as the small groove having the same width as the other small grooves.

In particular, in the case of a large plate having a width of about 1 m, expansion and contraction of the plate during the primary curing is expected, and misalignment at the other end is expected. ,And,
By not forming the small split groove at the left end, the positional deviation in the width direction can be prevented from causing a problem in appearance. The product material 1 punched into the final product shape as described above is subjected to final curing in the same manner as in a conventional roofing material manufacturing process, and becomes a flat roofing material as a product.

As can be seen from the above description, according to the manufacturing method of the present invention, since the positional shift on the reference plane side does not occur as described above, when the final product is cut, Since the positional relationship from the reference plane is substantially the same for all the flat roofing materials, and the small groove at the side end also has the same width dimension as the other small grooves, The design is not reduced. Therefore, a flat roofing material having a high product value can be easily obtained.

In the above description, the supply of the working oil is stopped when the working plate end face 5a of the pressing cylinder 4a having the higher working pressure reaches a predetermined position on the surface plate.
The same effect can be achieved even if the movement start point and stroke length of the pressing cylinder 4a having a higher working pressure are specified in advance, and the pressing cylinder is operated not only by hydraulic oil but also by compressed air. There may be.

[0019]

According to the present invention, it is possible to easily and surely obtain a flat roofing material in which the surface patterns of the final product are all arranged in the same positional relationship as viewed from the reference plane, and a high design can be obtained at the time of roofing. As a result, a flat roofing material with high product value can be obtained. In addition, even when a small groove is formed at the side end, a groove having the same width as the other small grooves can be surely obtained, and the roofing material manufactured from this point is considered to have high product value. Become.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a part of a manufacturing process in a method for manufacturing a roofing material according to the present invention.

[Explanation of symbols]

Reference numeral 1 denotes a product material which is an intermediate product of a flat roof material; 2 denotes a surface pattern; 3 denotes a small groove; 3a denotes a small groove (high-density portion) formed at a side end; 4a and 4b; Cylinder, 5a, 5b ... end face of operating plate, 6 ... pin

Claims (2)

[Claims] 1. A method of manufacturing a roofing material from a raw cement sheet, comprising: forming a high-density portion on at least one side end of a product material before primary curing that is larger than a final product shape; Characterized in that it comprises a step of: after the primary curing of the product material, positioning the high-density side end side as a reference surface and punching the product material into a final product shape. 2. When positioning, a pair of left and right pressing cylinders having different working pressures are used, and the pressing cylinder having a higher working pressure is used as the high-density side end portion side. The method for manufacturing a roofing material according to claim 1, wherein the product material after the primary curing is positioned by being sandwiched between cylinders and pressing both end portions.