JPH03120013A - Manufacture of inorganic lightweight panel - Google Patents

Abstract

PURPOSE:To make a continuous production possible, to keep a strength also at a constant low specific gravity and to prevent the occurrence of cracks and a surface deterioration by embedding a mesh wire gauze in the reverse to form a proof tensile strength material, by embedding a nonwoven fabric in the obverse and by constituting the whole body from a lightweight cement compound. CONSTITUTION:A nonwoven fabric 2 wound into a roll shape is mounted on a running belt conveyor 1 while it is rewound, and cement mortar A in a layer is supplied from a first hopper 3 onto this nonwoven fabric 2, rolling-compacted by a roll 4 and impregnated into the nonwoven fabric 2 while it is leveled to a given thickness. A cement composition B containing lightweight aggregate in a layer is supplied from a second hopper 5 to the surface of the mortar and a mesh wire gauze 6 wound into a roll shape is rewound and supplied onto the layer. Then, the mesh wire gauze 6 is embedded in the cement composition B containing the light aggregate by a rolling compaction roll 7 and leveled to a given thickness so that the whole body is formed into an integral body. Thereafter, the integral body is cut into given lengths and cured to form products. Thus, a continuous molding is made possible, a flexural strength is improved and the occurrence of cracks and a surface deterioration can be prevented.

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a method for producing an inorganic lightweight panel. [Prior Art] Conventionally, as an IT-free lightweight panel, weight reduction measures were applied to a matrix compound consisting of cement and wrinkle strength. Products that are widely used include adding natural or artificial lightweight aggregates, kneading them with water, shaping them into a certain shape, and curing them to harden them.

Incidentally, the strength of the above-mentioned lightweight inorganic panel decreases as it becomes lighter, so it is essential to use reinforcing fibers such as glass fiber or carbon fiber to provide the necessary strength.

[Problems with conventional technology]

By the way, when manufacturing the above-mentioned inorganic lightweight panels, the inorganic compound contains a large amount of lightweight aggregate and reinforcing fibers, so when mixed with water, the fluidity of the slurry becomes very poor, so it is difficult to use the molding method. had to use the casting method, which had the problem of poor production efficiency.

In addition, regardless of whether it is lightweight or not, inorganic products generally suffer from problems such as cracking due to shrinkage and surface deterioration, and fiber reinforcement by uniformly mixing and dispersing single fibers does not allow the fibers to continue for a long time, so a drastic solution to these problems is needed. There was a problem that it was impossible to plan.

[Effect]

[Problems to be Solved by the Invention] In view of the above-mentioned problems, the present invention has developed an inorganic material that is capable of continuous production, maintains strength even at a certain low specific gravity, and has excellent strength without cranking or surface deterioration. The purpose of this work is to provide a method for manufacturing lightweight kabul.

[Technology that led to solving the problem]

That is, the method for producing an inorganic lightweight panel of the present invention involves continuously supplying a nonwoven fabric onto a traveling heald conveyor, supplying cement mortar in a layered manner from above the nonwoven fabric, and impregnating the nonwoven fabric with the cement mortar using a compaction roll. A cement mixture material for lightweight concrete is supplied in layers from above the layer, a mesh wire mesh is continuously laid and supplied on the core layer, and the mesh wire mesh is rolled into lightweight concrete using a pressure roll. It is characterized in that it is embedded in a cement compound material layer and leveled to a certain thickness, then cut into a certain length, and then cured and hardened by a conventional method.

Generally, in a cement molded board, it is desirable that the front surface portion has a high compressive strength and the back surface portion has a high tensile strength.

Therefore, in order to satisfy the above requirements in this invention, when forming a lightweight plate material, a mesh wire mesh is embedded in the back side to make it a tensile strength material, a nonwoven fabric is embedded in the front surface, and the whole is made of a lightweight cement compound. This allows us to create a lightweight inorganic panel that satisfies the above requirements.

Further, mesh wire mesh, nonwoven fabric, etc. can be continuously supplied in the form of rolls, and by combining this with the Bell 1-forming method, the above-mentioned plate material can be continuously molded.

〔Example〕

Next, the present invention will be explained using examples.

FIG. 1 is a sectional view of an embodiment of the invention.

Nonwoven fabric 2 wound into a roll on a running belt conveyor 1
is placed on the nonwoven fabric 2 while unwinding it, and the first hopper 3 is placed on this nonwoven fabric 2.
Cement mortar A is supplied in an i-shape and rolled with rolls 4 to impregnate it into the nonwoven fabric 2 and evened out to a constant thickness, and the cement composition B containing lightweight aggregate is layered on the surface of the nonwoven fabric 2 using a second hopper 5. The mesh wire mesh 6 wound into a roll on this layer is unwound and supplied, and the mesh wire mesh 6 is transferred to the cement composition B containing lightweight aggregate using a compaction roll 7.
After embedding the material in a container, leveling it to a certain thickness and integrating the whole into one piece, it is cut into a certain length, and then subjected to primary curing in a conventional manner and secondary curing in an autoclave, and then manufactured into a product.

FIG. 2 shows a cross-sectional view of the product obtained by the above method, and the lightweight inorganic board G obtained by the above method uses the side where the nonwoven fabric 2 is embedded as the surface, and this surface layer is made of ordinary cement slurry. Since it is composed of A and is compacted by rolls, it is a very dense layer, and together with the embedded nonwoven fabric 2, it has excellent compressive strength, and the back side has a remarkable tensile strength due to mesh gold + 4F46. Reinforced.

Further, since the side where the mesh wire mesh 6 is embedded is made of the cement composition B containing lightweight aggregate, the weight of the entire product can be reduced.

The inorganic lightweight tent with a thickness of 20mm, width of 450mm, and length of 900 inches obtained by the method of this invention was subjected to a bending test based on JIS No. 4 by applying a bending force so that the side where the mesh wire mesh was embedded became convex. The results are shown in the table.

Furthermore, when the specific gravity was measured, it was found to be 1.2, indicating that the weight was sufficiently reduced.

table The results are shown for a test plate having the same shape as the example.

〔effect〕

As described above, this invention not only enables continuous molding using a lightweight inorganic plate or a heald conveyor, but also enables mass production. The quality board has very good bending strength and has the effect that it can be used satisfactorily as an exterior wall material or floor material for buildings.

[Brief explanation of drawings]

FIG. 1 is a side view of an apparatus for carrying out the method of this invention;
The figure is a cross-sectional view of a lightweight inorganic plate obtained by the method of the present invention.

Claims (1)

[Claims] (1) Continuously supply a non-woven fabric onto a running belt conveyor, supply cement mortar in layers from above the non-woven fabric, impregnate the non-woven fabric with the cement mortar using a compaction roll, and level it to a constant thickness. A cement mixture material for lightweight concrete is supplied in a layered manner from above the layer, a mesh wire mesh is continuously laid and supplied on the layer, and the mesh wire mesh is embedded in the layer of the cement mixture material for lightweight concrete using a compaction roll. A method for producing an inorganic lightweight panel, which comprises: uniformizing the thickness to a constant thickness, cutting it to a constant length, and curing and hardening it by a conventional method.