JPH03219921A - Molding method for joint part of inorganic plate - Google Patents

Abstract

PURPOSE:To mold sharply even the joint part in a complicated form efficiently and damagelessly without requiring post-processing, by a method wherein cement slurry is cast into a joint part-molding part of a molding tool after arrangement of a molten row foamed material in a fixed form into the joint part-molding part of the molding tool, the real part is molded by performing autoclave-curing after demolding. CONSTITUTION:A surface molding tool 2 is arranged within a concrete shuttering molding tool 1 and a meltable foamed material 3 is arranged within a joint part molding part. Then cement slurry 4 as a mineral panel molding material is cast into the concrete shuttering. The cast cement slurry 4 is demolded from the concrete shuttering molding tool 1 after cure with precure. With this construction, a mineral cured plate 5 having the foamed material 3 is obtained. Then the demolded mineral cured plate 5 is autoclave-cured. The foamed material 3 is molten and the joint part 6 is formed, in this curing.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method of forming an inorganic plate solid part. More specifically, this invention utilizes inorganic plates such as lightweight aerated concrete plates that can be easily demolded after casting, do not require post-processing, and can sharply reproduce patterns in complex shapes. This relates to a method of molding the parts.

(Prior Art) Cement-based inorganic boards formed from cement slurry containing fillers such as fly ash and silica stone have been widely used as building materials such as exterior materials and ceiling materials.

Among these inorganic boards, lightweight aerated concrete boards, which are formed by introducing air bubbles into slurry, are attracting particular attention as a lightweight material with excellent heat insulation properties. Furthermore, various improvements have been made to manufacturing processes such as excipient methods, and improvements as a practical technology are being actively pursued. For example, methods for introducing air bubbles include the pre-form method, mix-form method, and after-form method. All of these methods are useful for streamlining and sophisticating the production process, as well as for producing lightweight aerated concrete plates. Various ways to improve quality are being considered.

Furthermore, conventionally, a so-called casting method has been known as a representative method for producing inorganic plates such as lightweight cellular concrete plates.

(Problem to be solved by the invention) However, when using such an inorganic board as a building material, the formation of its real part is an important issue from the viewpoint of workability, as well as productivity. . Normally, in the case of an inorganic board such as a lightweight aerated concrete board that does not have sufficient strength when demolded, the complex-shaped real part is formed by machining or the like after molding.

However, forming the real part by post-processing such as machining after forming is not preferable in terms of improving productivity because it adds a processing step, and it is also difficult to process the hardened cementitious inorganic board. In some cases, materials with low strength such as lightweight aerated concrete plates are easily damaged, and it is not possible to form a real part in a predetermined shape with high precision.

This invention was made in view of the above circumstances, and it improves the shortcomings of the conventional real part forming method, and makes it possible to efficiently sharpen even complex-shaped real parts without the need for post-processing and without damage. The aim is to provide a new method for molding.

(Means for Solving the Problems) This invention solves the above problems by disposing a meltable foam material of a predetermined shape in the real molding part of a mold, injecting cement slurry, and removing the mold. Provided is a method for forming an inorganic board fruit part, which is characterized in that the fruit part is formed by curing in an autoclave afterwards.

(Function) In the method of the present invention, cement slurry is injected using a meltable foam material into the molded part corresponding to the real part, and by curing in an autoclave after demolding, the foam material is melted and an inorganic plate is formed. The real part is formed by welding to the inner wall of the groove of the real part.

Therefore, it is possible to form a sharp real part of a complicated shape without requiring post-processing. Damage to the real part during processing can also be suppressed.

(Example) Hereinafter, the method for molding an inorganic plate portion of the present invention will be described in more detail with reference to the drawings.

FIG. 1 of the attached drawings illustrates the steps of the molding method of the present invention.

(a) First, for example, as shown in this Figure 1,
A surface mold (2) is placed in the mold (1), and then a meltable foam material (3) is placed in the real molding section.

This foamed material (3) has a predetermined shape with a real part, and is made of an appropriate polymer material such as expanded polystyrene. Further, this foamed material (3) is capable of melting and losing its shape during autoclave curing after demolding.

(b) Next, cement slurry (4) as an inorganic panel forming material is poured into the formwork.

The composition of the cement slurry at this time can be any composition including conventionally known ones, such as Portland cement, fillers and reinforcing materials such as silica, fly ash, asbestos, glass fiber, and silica, and cellulose. It is possible to use a slurry of a composition to which ingredients such as , pulp, and natural protein-based foaming agents and surfactants are added. In order to obtain a lightweight aerated concrete board, other means for introducing air bubbles such as a preform method, a mix form method, etc. can be appropriately employed.

(C) The cast cement slurry (4) is removed from the mold (1) after pre-curing and hardening.

This results in an inorganic hardened board (5) having a foamed material (3).
get.

(d) Next, this demolded inorganic cured plate (5) is cured in an autoclave. In this curing foam material (3)
is melted, and the foamed material (3) from which the real part (6) is formed is welded to the inner wall of the groove of this real part (6). In this way, an inorganic plate (7) having a real part (6) is obtained.

FIG. 2 shows an example of the groove of the real part obtained by such a process. As shown in FIG. 2, a welding surface (8) to which the meltable foam material (3) is welded is formed on the inner wall of the groove of the real portion (6).

This welding surface (8) allows a sharp shape to be reproduced even in the real part of a complex shape. Of course, no post-processing is necessary.

In addition, in the above example, a lightweight aerated concrete plate having air bubbles (9) as shown in FIG. ) are not limited to the shapes and arrangement examples above.

For example, it is also possible to form a real part (6') as shown in FIG. The shape and arrangement of the meltable foam material (3') may be selected and set accordingly.

In fact, according to the above process, a mold with foamed material is placed in it.
When a cement slurry containing silica stone, fly ash, foaming agent, methyl cellulose, and surfactant was mixed into Portland cement was cast and cured in an autoclave after demolding, a sharp real part was formed and there was no damage to the real part. (Effects of the Invention) With this invention, as explained in detail above, demolding is easy even if the real part has a complicated shape, and sharp real parts of inorganic plates can be efficiently formed. becomes.

[Brief explanation of drawings]

FIG. 1 is a perspective sectional view illustrating the molding process of the present invention. FIG. 2 is a perspective view illustrating a real part according to the method of the present invention. FIG. 3 is a perspective sectional view showing yet another example of the process. 1... Formwork mold 2... Surface mold 3.3'... Foaming material 4... Cement slurry 5... Inorganic hardened board 6.6'... Real part 7... Inorganic board 8...
Welding surface 9... air bubbles

Claims (1)

[Claims] (1) An inorganic plate fruit part characterized in that a meltable foam material of a predetermined shape is placed in the real part forming part of a mold, cement slurry is injected, and after demolding, the real part is formed by curing in an autoclave. Molding method.