JPS6223712A - Manufacture of building board - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a method for manufacturing architectural boards such as flat roof tiles.
In detail, it relates to a method of forming paper-made raw materials in an undried and uncured state (hereinafter referred to as green sheets). related to technology.

[Background Art 1 Conventionally, in order to manufacture architectural boards such as flat tiles by press-cutting and forming green sheets that are continuously supplied after papermaking as raw materials for forming architectural boards such as flat tiles, the method shown in Fig. 3 is used. As shown in FIG. 4, a part of the approximately linear cut 1ia is left uncut, and its curing is performed by stacking many pieces as shown in FIG. Because they are placed close to each other and stacked on top of each other during curing, problems such as cracks and cracks are likely to occur. In addition, the notch decoration b in the middle of the cutting line a was made by punching or post-processing.
The mold becomes complicated, post-processing is required, and the shape of the product is limited due to the relationship with neighboring products, making it impossible to meet market needs.

[Object of the invention 1 The present invention has been made in view of such problems,
The purpose of this is to simplify the mold by avoiding punching, and also to avoid problems during curing (and to create an architectural structure where the product shape can be set in various shapes regardless of the adjacent ones). An object of the present invention is to provide a method for manufacturing a board.

DISCLOSURE OF THE INVENTION 1 The method for manufacturing a construction board of the present invention involves press-cutting an undried, uncured raw material 1 to form an edge 2 around the circumference of a predetermined shape to be removed, and forming an edge I! This method is characterized by removing the portions 52 and curing them at intervals, and by this method, the above object has been achieved. In other words, by forming the ear part 2 around the circumference of a predetermined shape to be press cut, there is no need to design a press mold in relation to the adjacent predetermined shape, and even when forming outside the notch, punching There is no need to make a mold, and the mold can be simplified.Moreover, since the molded product is cut into a predetermined shape and is molded, the ears on the periphery are removed and the molded product is cured at intervals, so there is no problem during curing. It is designed to prevent scratches, cracks, etc.

Embodiments of the present invention will be described in detail below based on the drawings.

The raw material 1 is like an asbestos-cement raw material, which is made into paper in an undried and uncured state, and is molded into a flat tile made of asbestos-cement board or the like. A press molding die in which a dewatering material such as felt for dewatering is spread on the lower surface of the raw material 1 in an undried and uncured state on a carrier plate, and an edge part of the raw material 1 to be transferred is hemmed in a predetermined shape A and hangs down. The raw material 1 can be press-cut and formed into a predetermined shape A. This predetermined shape A is a curved cutting line B formed by a substantially S-shaped blade.
It has a shape in which two flat roof tiles D are formed so as to have rotational symmetry of 180° with respect to the roof. In this curved cutting line B, as shown in FIG. 1(b), the groove bottoms E of the curved cutting line B are continuous, so that it can be cut and separated at the groove bottom E after curing and hardening. It is. Then, an ear portion 2 is removed from the circumference of the predetermined shape A before curing.
is formed and press-cut, the undried and uncured ears 2 are removed, and the predetermined shapes A are placed on a pallet 3 at intervals and cured in a curing process.

According to such a method, by forming the ears 2 on the circumference of the predetermined shape A and performing press cutting, there is no need to design a press molding die in relation to the adjacent predetermined shape A. Even when forming a notch, there is no need to use a punching die, the die is simplified, and the molded product cut into the predetermined shape A can be cut into the local ear 2 [Fig. 1 (a)
J, which is shown by the diagonal lines, is removed and cured at intervals, so that no cracking or cracking occurs during curing.

[Effects of the Invention] In short, the present invention forms ears around the circumference of a predetermined shape to be press-cut and molded, so there is no need to design a press molding die in relation to the adjacent predetermined shape. There is no need to use a punching die when forming a notch, and there is an advantage that the die can be simplified. Furthermore, since the molded product cut and formed into a predetermined shape is cured by removing the edges on the periphery and leaving intervals, there is an advantage that no cracks or cracks occur during curing. Furthermore, the predetermined shape can be set to various shapes regardless of the neighboring ones, making it possible to set the predetermined shape to various shapes on the market. 1
Rokushi Ira Geki 1 Urajima L”

[Brief explanation of drawings]

FIG. 1(a) is a plan view of an embodiment of the present invention, and FIG. 1(b) is a plan view of an embodiment of the present invention.
) is an x-xi cross-sectional view of Fig.
The figure is a sectional view of the same molded product as above, and FIG. 5 is a perspective view of a conventional example during curing, where 1 is the raw material and 2 is the ear. Agent Patent Attorney Ishi 1) Ai Figure 7, Figure 4, Figure 5

Claims (1)

[Claims] (1) For architectural use, which is characterized in that undried and uncured raw materials are press-cut and molded by forming ears to be removed around the periphery of a predetermined shape, and the ears are removed and cured at intervals. Method of manufacturing the board.