JPH06143227A - Extrusion molding method for reinforced inorganic board - Google Patents

Abstract

(57) [Summary] [Purpose] An object of the present invention is to obtain an extrusion molding method for a reinforced inorganic sheet material which can dramatically improve product strength and is excellent in fire resistance in the extrusion molding method. [Constitution] A slurry S made of an inorganic raw material is molded into a die 1
When extrusion-molding into a plate shape, the reinforcing rebar 2 framed in advance in the molding die 1 is supplied concentrically with the molding product G, and the adhesive 3 is attached to the molding die 1 site corresponding to the front and back surfaces of the molding product G. The slurry S is extruded into a plate shape from the forming die 1 while supplying the impregnated reinforcing nets 4 and 4, and the formed body G is cut into a predetermined length and then cured by steam curing. The reinforcing bar 2 and the reinforcing nets 4 and 4 reinforce the molded product G and improve fire resistance.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for extrusion-molding a reinforced inorganic sheet material, and more particularly, to an extrusion-molding method for a reinforced inorganic sheet material having an inner frame reinforced and reinforcing front and back portions reinforced with a reinforcing net. .

[0002]

2. Description of the Related Art Conventionally, an inorganic building material containing cement or the like as a main component has been very widely known as a building board material. An extrusion molding method is also known as a method for manufacturing these inorganic building materials. In this extrusion molding method, since cement slurry can be extruded from the molding die to form a product having an arbitrary cross-sectional shape, for example, a plate material having a hollow hole or the like can be formed, and a construction material suitable for various uses can be formed. By the way, in order to impart strength, impact resistance or fire resistance to these inorganic building materials, during extrusion molding, reinforcing fibers are added to the cement slurry or a reinforcing net is supplied to the surface of the molded product for integral molding. .

[0003]

However, among the above-mentioned reinforcing means, the means for adding the reinforcing fiber to the cement slurry is, when considering the mixing property of the material and the fiber and the mutual dispersibility thereof,
Since it is difficult to add long fibers, it is unavoidable to add short fibers, and there is a problem that the degree of reinforcement is limited. Also,
The method of supplying a reinforcing net to the front and back of the molded product to integrally mold it provides a high level of reinforcing effect that cannot be obtained with the reinforcing fiber depending on the material of the reinforcing net, but it can be bent because of the ease of supply during molding. I have no choice but to use synthetic fiber nets,
For example, there is a drawback that it is difficult to obtain the strength of a building material containing reinforcing bars. Furthermore, when exposed to high temperatures, the structure may be extremely dense and may explode violently, which cannot be sufficiently prevented by the addition of the above fibers or reinforcing nets, and the fire resistance is low in this respect. was there. Although there is a molding method as a molding method for inserting a reinforcing net or a reinforcing bar, it has no continuous productivity.
The production efficiency is far inferior to that of extrusion molding because there are restrictions on the mold volume and installation location.

[0004]

SUMMARY OF THE INVENTION In view of the above problems, the present invention aims at obtaining an extrusion molding method for a reinforced inorganic sheet material capable of dramatically improving the product strength and having excellent fire resistance in the extrusion molding method. It was done for the purpose.

[0005]

That is, according to the extrusion molding method of a reinforced inorganic sheet material of the present invention, when the slurry S made of an inorganic raw material is extruded into a plate shape from the forming die 1, the forming die 1 is preliminarily framed. The reinforcing bar 2 is supplied concentrically with the molded product G, and the slurry S is molded while supplying the reinforcing nets 4 and 4 impregnated with the adhesive 3 to the molding die 1 portions corresponding to the front and back surfaces of the molded product G. It is characterized in that it is extrusion-molded into a plate shape from the die 1, the molded body G is cut into a predetermined length, and then cured by steam curing.

[0006]

Embodiments of the present invention will be described below. FIG. 1 is a side view of an apparatus for carrying out the method of the present invention, and FIGS. 2 and 3 are sectional views of a reinforced inorganic plate material obtained by the method of the present invention.

In the extrusion molding method of a reinforced inorganic sheet material of the present invention, when the slurry S made of an inorganic raw material is extruded into a plate shape from the forming die 1, the reinforcing bars 2 framed in advance in the forming die 1 are concentrically formed. The slurry S is extruded into a plate shape from the molding die 1 while supplying the reinforcing nets 4 and 4 impregnated with the adhesives 3 and 3 to the molding die 1 site corresponding to the front and back surfaces of the molded product G, After the molded product G is cut into a predetermined length, it is cured by steam curing.

In the above description, the reinforcing bar 2 has a frame composition shape as shown in FIG. 2 or FIG.
It is inserted from the rear 1A of the molding die 1 at a speed synchronized with the extrusion speed. Further, the molding die 1 is connected to the extruder 5 by a curved pipe 6, and the reinforcing bar 2 is inserted through an insertion port 6A provided in the curved pipe 6. In addition, the curved pipe 6 equalizes the material flow to the forming die 1, so that the portion 1 immediately before the forming die 1 is formed.
A concavely curved one is used at B.

When the molded product G molded from the molding die 1 is a solid body, the frame shape of the reinforcing bar 2 is arbitrary as shown in FIG. As shown in FIG. 3, it has a frame shape avoiding the hollow hole P.

The reinforcing nets 4 and 4 are synthetic fiber nets, and are flexible nets such as vinylon fibers, nylon fibers and acrylic fibers. Also, this reinforcing net 4,
4 is supplied to the molding die 1 after being immersed in a tank 3A of an adhesive 3 formed by mixing cement, methyl cellulose and the like with water. Therefore, in the molding die 1, the molded product G is well compatible with and integrated with the molded product G.

In the cutting device 7, since the reinforcing bar 2 and the reinforcing nets 4 and 4 are inside the molded product G, it is difficult to cut with a blade, and the extrusion molded product G is uncured.
A water jet cutting device is used.

The molded product cut into a predetermined length is
Hardened by steam curing. High temperature steam curing by the autoclave is not carried out in order to prevent corrosion of the reinforcing bar 2 due to high temperature. Then, after curing and hardening, the product is immersed in a water-resistant paint such as a sealer for waterproof coating.

[0013]

In the present invention, the reinforcing bar 2 is the forming die 1.
Since it is inserted in a straight line from the rear toward the extrusion direction, the reinforcing rebar 2 is integrally embedded inside the molded product G as it is inserted, and the reinforcing rebar 2 and the molded product G are separated by the extrusion pressure. Integrate without a gap. The reinforcing nets 4 and 4 supplied to the front and back surfaces of the molded product G are firmly impregnated with the molded product G because the adhesive 3 is impregnated in advance. Further, during curing, the reinforcing steel bar 2 is not corroded by heat because it is steam cured and not high temperature cured.

[0014]

As described above, according to the method of the present invention, a product in which the reinforcing bar 2 is embedded inside and the reinforcing nets 4 and 4 are integrally laminated on the front and back surfaces is continuous. The bending strength is much stronger than conventional products because the reinforcing bar 2 is embedded inside the product, and the product is laminated on the surface with the reinforcing bar that is embedded inside. Explosion resistance is improved and fire resistance is improved by synergistic effect with the reinforcing nets 4 and 4, and even if an explosion occurs, debris is generated by the reinforcing nets 4 and 4 and the reinforcing steel bar 2 embedded inside. Scattering is also prevented, and there are various effects such as safety.

[Brief description of drawings]

1 is a side view of an apparatus for carrying out the method of the present invention.

FIG. 2 is a cross-sectional view of a reinforced inorganic plate material obtained by the method of the present invention.

FIG. 3 is a cross-sectional view of another reinforced inorganic board material obtained by the method of the present invention.

[Explanation of symbols]

 S ... Slurry made of inorganic raw material G ... Molded product 1 ... Molding die 2 ... Reinforcing bar 3 ... Adhesive 4 ... Reinforcing net

Claims (1)

[Claims] 1. When extrusion molding a slurry S made of an inorganic raw material into a plate shape from a molding die 1, a reinforcing bar 2 framed in advance in the molding die 1 is supplied concentrically with a molding product G, and at the same time, a molding product. G The slurry S is extruded into a plate shape from the forming die 1 while supplying the reinforcing nets 4 and 4 impregnated with the adhesive 3 to the portion of the forming die 1 corresponding to the front and back surfaces.
A method for extrusion-molding a reinforced inorganic sheet material, which comprises: cutting a sheet into a predetermined length and then curing it by steam curing.