JPS6223710A - Method of molding 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 1] The present invention relates to a method for forming architectural boards such as flat tiles,
Specifically, the present invention relates to a method of forming a plate material in an undried and uncured state (hereinafter referred to as a green sheet), and more specifically relates to a technique for forming holes with a simple configuration.

[Background technology] Conventionally, punching using a punching bin or the like has been considered for punching holes in green sheets that are continuously supplied after papermaking as raw materials for forming building boards, but this processing method requires a lower die. Therefore, it is difficult to perform hole processing on a green sheet that has been made into paper and is being transported by a carrier plate. Therefore, to form a green sheet into a predetermined shape and form small holes in it, this is usually done in post-processing using a grinder, whetstone, cutter, etc., which has low productivity and makes it difficult to process into complicated shapes. It is extremely difficult to do so, and there are also problems such as severe wear of the cutting tool.

[Object of the invention] The present invention has been made in view of these problems,
The purpose of this invention is to provide a method for forming a construction board, which has a simple structure and can easily form holes in a green sheet.

[Disclosure of the Invention] The method for forming a construction board of the present invention includes punching an undried and uncured board material 1 into a punched shape using a hollow cylindrical cutter 3 whose edge portions 2 are bordered, and punching into the cutter 3. The object to be punched 4 is returned to the hollow hole 5 of the plate material 1 using air pressure when the blade 3 is raised, and the object to be punched 4 is removed after curing and hardening. The purpose has been achieved. In other words, the object to be punched 4 punched into the hollow cylindrical blade 3 is returned to the hollow hole 5 by air pressure, and the object to be punched 4 is cured and hardened.
Since the holes are removed, it is possible to easily drill holes in the green sheet without using any cutting equipment.

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

The board material 1 is like an asbestos cement board material,
It is paper-made in an undried, uncured state, and is then molded into tiles made of asbestos-cement boards. The cutter 3 is attached to an upper mold 8 for press-forming the outer shape of the flat tile B, and its edge portion 2 is shaped to frame the punched hole shape, and the cutter 3 itself is formed into a hollow cylinder shape. An airtight packing 10 is interposed between the upper mold 8 and the base plate 9, and a conduit 11 formed in the base plate 9 is communicated with the hollow interior of the cutter 3, and an air pipe 12 is connected to the hollow interior of the cutter 3. air through the blade a
This allows it to be pumped into the hollow interior of ttJ3.

The plate material 1 that has been placed on the carrier plate 6 via the felt 7 and transferred is then moved to the upper mold 8 by lowering the base plate 9.
The forming blade 13 and the edge part 2 of the cutting tool 3 are inserted into the plate material 1 to form the material, and at the same time, the hollow cylindrical cutting tool 3 punches out the object 4 to be punched.

In such a case, the object 4 to be punched has entered the inside of the blade 2, and as the base plate 9 is raised, air is forced into the hollow interior of the blade 3 from the air pipe 12, and the object 4 to be punched is inserted into the plate material. It is returned to the hollow hole 5 of No. 1. In such case,
Even if a pressure switch 14 is provided in the air pipe 12 and the pressure rise is detected when the corrugated material 4 does not escape from the cutter 3 due to air pressure, an alarm etc. is issued for automation. good. Thereafter, after drying and hardening in a curing process, the material to be punched 4 is removed, and holes are easily formed in the green sheet without using any cutting engineer.

[Effects of the Invention] In short, the present invention returns the punched object punched into a hollow cylindrical blade into the hollow hole using air pressure, and removes the punched object after curing and hardening. This method has the advantage that the hole can be machined without using any cutting engineer, and the hole can be easily machined even if the shape of the hole is complicated.

[Brief explanation of the drawing]

Fig. 1 is a schematic plan view of a press-cut plate material according to an embodiment of the present invention, Fig. 2 is a schematic side sectional view showing the same forming method as above, and Fig. PIIJ3 shows the cutter in section A of Fig. 1. 4 is a partial bottom view of the edge portion of the above, FIG. 5 is a side view of the same, and FIG. 6 is a plan view showing the molded flat tile of the above, 1 is a plate material, 2 is a plate material. Edge part, 3 is a knife,
4 is an object to be punched, and 5 is a hollow hole. Agent Patent Attorney Ishi 1) Chief Figure 7 6

Claims (1)

[Claims] (1) Punch an undried, uncured plate material into a punched shape using a hollow cylindrical blade with a hemmed edge, and insert the punched object into the blade into the blade by using air pressure to make holes in the plate material. A method for forming architectural boards, characterized by removing the material to be punched after curing and curing.