JPH0825179B2 - Composite inorganic plate and its manufacturing method - Google Patents

Description

The present invention relates to a composite inorganic plate obtained by using a plurality of materials and a method for producing the same.

[Conventional technology]

In recent years, a large number of composite ceramic plates having a plurality of layers are attached to the inner and outer walls and the ceiling.

In such a composite ceramic plate, the strength of the whole is improved by using any one of the above-mentioned plurality of layers as a reinforcing layer, or the weight of the whole is reduced by forming any one of the layers with a lightweight material. Is being done. This type of composite ceramic plate has been conventionally used as shown in FIG. 7, for example, as shown in FIG.
In the case of having a three-layer structure described above, a single-layer ceramics plate is formed in advance using each material, and these single plates are integrated by using an adhesive or the like.

[Problems to be Solved by the Invention]

However, the above-mentioned manufacturing method has a problem that the manufacturing process is very complicated, such that each single-layer ceramic plate is manufactured in a separate step, and then these ceramic plates are integrated, and the cost becomes high. ing. Further, the obtained composite ceramic plate has a structure in which a plurality of layered plates are simply stacked, and since the reinforcing layer or the weight-reducing layer is not wrapped in the outer peripheral layer, it is reinforced in a high humidity atmosphere. There is a problem that a layer or the like is peeled from another layer, and in some cases, the reinforcing layer or the like is corroded by a corrosive atmosphere of the outside air.

The present invention has been made in view of such circumstances, and is a composite in which a core layer including a reinforcing layer and a weight-reducing layer is not peeled from other layers or corroded by the action of outside air or the like. It is an object of the present invention to provide an inorganic plate and a method by which it can be easily manufactured.

[Means for solving the problem]

In order to achieve the above object, the present invention, in a composite inorganic plate consisting of a core layer and the outer peripheral layer of the outer periphery thereof, the core layer is formed by press-fitting a heterogeneous material with the outer peripheral layer from the bottom opening, A composite inorganic plate extending in the outer peripheral direction around the bottom opening is defined as the first gist, and a pair of upper and lower casting molds in which a casting port is opened in the center of the shaping recess of the lower mold is prepared. A step of preparing n kinds of sludge, and a step (n-
1) A peripheral layer forming step of sequentially pouring different types of sludge, a core layer forming step of casting the remaining sludge of the sludge from the casting opening of the lower die after closing the lower die and the upper die, and hardening the sludge The second gist is a method for producing a composite inorganic plate having a curing step for performing the above.

[Action]

That is, according to the present invention, the composite inorganic plate is integrally formed by a single molding die instead of forming each single plate in advance as in the conventional case and then integrally forming each single plate. Therefore, unlike the conventional case, the complicated steps of performing casting and integral molding in separate steps are not required, the molding process can be simplified, and molding can be performed in a space-saving manner and at low cost. realizable. The composite inorganic plate thus obtained is formed by press-fitting the core layer with a material different from that of the outer peripheral layer from the bottom opening, and is formed in a state of extending in the outer peripheral direction around the bottom opening. . For this reason, the core layer and the outer peripheral layer made of different materials are in a continuous state at the interface, and the bonding strength between them is extremely large, and the core layer is wrapped in the outer layer and does not come into contact with the outside air. There is no problem of peeling and corrosion.

The composite inorganic plate of the present invention comprises a core layer and an outer peripheral layer surrounding the outer periphery of the core layer.

The material for forming the core layer and the outer peripheral layer is not particularly limited, and various kinds of sludge, such as concrete mortar and ceramic powder flurries, can be used. Then, in order to obtain a composite inorganic plate having high strength, glass fiber mixed concrete having high tensile strength is used as a core layer forming material. Further, it is possible to reduce the weight by using foamed concrete as the core layer forming material. Furthermore, if a low-cost material is used, a more effective product cost reduction can be achieved.

Next, the production of the composite inorganic plate using the above raw materials,
For example, it is performed as follows. That is, first, the structure of the casting mold used for manufacturing the composite inorganic plate will be described.
FIG. 1 shows an example of a pair of upper and lower casting molds used in the present invention. In the figure, reference numeral 10 denotes an upper die, which is adapted to be moved up and down by driving a hydraulic cylinder (not shown). Reference numeral 11 is a lower mold fixed on a base 12, and a casting port 13 is opened in the center of the recess in the mold. A casting material passage 14 communicates with the casting port 13 and is connected with a material supply pipe 15 extending from a casting material supply source (not shown).

The composite inorganic plate of the present invention is produced using the above-mentioned casting mold, for example, as follows. That is, three kinds of slurry A material, B material and C material are prepared in advance. And
As shown in FIG. 2, the B material 16 is filled into the recess in the lower mold 11 so as to form two layers, and then the A material 17 is sequentially filled. At this time, the total amount of filling is 60 to 85 of the inner volume of the lower mold 11.
It is necessary to make it%. That is, when the filling amount is less than the above range, the inflow amount of the C material at the time of casting increases, so that the influence of the flow on the A material 17 and the B material 16 becomes large and the shape easily deforms. On the contrary, if the filling amount is larger than the above range, the inflow amount of the C material 18 at the time of casting becomes small and the molding becomes insufficient. After filling the lower mold 11 with the two types of base sludge 16 and 17 in this manner, the upper mold 10 is lowered and the mold is clamped. As shown in FIG.
Material 18 is cast, and A material 17 and B material are applied to the inner surfaces of the upper mold 10 and the lower mold 11.
Absorbs the moisture of 16 and C material 18 and A material 17, B material 16 in the mold
And the C material 18 is integrally molded. At this time, the C material 18
As shown in FIG. 4, it infiltrates between the A material 17 and the B material 16, and lifts up the A material 17 while spreading to the left and right in the mold. Next, this is demolded, and as shown in FIG. 5, A portion 17 'derived from A material 17 and B derived from B material 16 are obtained.
A composite inorganic shaped body is obtained in which the C portion (core layer) 18 'derived from the C material 18 is flattened around the bottom opening between the portions 16'. Therefore, when this shaped body is cured, it is possible to obtain a composite inorganic plate in which three different kinds of materials are overlapped with each other.

Thus, according to this molding method, 3
A composite inorganic plate made of different kinds of materials and having the core layer 18 'and the outer peripheral layers A part 17' and B part 16 'in a continuous state at the interface can be easily manufactured, The manufacturing process is simplified. Therefore, the cost of the product can be reduced, and the space for the manufacturing process can be saved.

In the above-mentioned manufacturing method, as a method for curing a molded article, for example, in the case where the shaped body is formed using concrete mortar, autoclave curing or natural curing is mentioned, and the shaped body uses a ceramic powder slurry. In the case of being formed by firing, firing or the like can be used.

Furthermore, the types of materials for forming the composite inorganic plate are not limited to the above three types, and two or four or more types may be used. The manufacturing method in this case is also the same as the above manufacturing method.

〔The invention's effect〕

As described above, in the method for producing the composite inorganic plate of the present invention, n kinds of sludge are prepared in advance, and (n−
1) Slurries of various types are sequentially poured into the lower mold at an appropriate ratio to form an outer peripheral layer, and after clamping the mold, the remaining slurry of the above-mentioned slurry is cast from a casting opening provided in the center of the lower mold to form a core layer. The shaped body obtained by doing so is cured. Therefore, according to this manufacturing method, a complicated process is not required, the molding process can be simplified, and the molding can be performed in a space-saving manner so that the cost can be reduced. The composite inorganic plate thus obtained is formed by press-fitting the core layer with a material different from that of the outer peripheral layer from the bottom opening, and is formed in a state of extending in the outer peripheral direction around the bottom opening. . Therefore, the core layer and the outer peripheral layer made of different materials are in a continuous state at the interface, and the mutual bonding strength is extremely large, and the core layer is wrapped in the outer peripheral layer and does not come into contact with the outside air. There is no problem of peeling and corrosion.

 Next, the present invention will be described based on examples.

Example 1 First, three types of concrete mortar, that is, A
Pigment mixed mortar, B material ordinary mortar and C material glass fiber mixed mortar with high tensile strength were prepared. Then, as shown in FIG. 2, the lower mold 11
The material B was filled in the concave portion so as to form two layers, and then the material A was sequentially filled. At this time, the total amount of filling the materials A and B was set to 60 to 70% of the inner volume of the lower mold 11. In this way, two kinds of mortar 16,1 in the lower mold 11
After filling with 7, the upper mold 10 is lowered and clamped,
As shown in the figure, cast C material 18 from the casting port 13
Moisture of A material 17, B material 16 and C material 18 was absorbed on the inner surfaces of 10 and lower mold 11 to integrally mold A material 17, B material 16 and C material 18 in the mold. At this time, the C material 18 penetrates between the A material 17 and the B material 16 as shown in FIG. 4, and further, the A material 17 is lifted up while spreading right and left in the mold. Next, this is demolded, and as shown in FIG. 5, between the A portion 17 'derived from the A material 17 and the B portion 16' derived from the B material 16, C
A composite inorganic shaped body having a flattened and widened C portion 18 'derived from the material 18 was obtained. Then, this shaped body was autoclaved and cured to prepare a composite inorganic plate having high strength in which three different materials were superposed.

Example 2 First, two types of concrete mortar, that is, D
Ordinary mortar was prepared as the material and foamed mortar was prepared as the E material. Then, in the same manner as in Example 1 above, the recess D in the lower mold 11 was filled with the D material. At this time, the filling amount of the D material was set to 60 to 70% of the inner volume of the lower mold 11. After the lower mold 11 is filled with the D material in this way, the upper mold 10 is lowered and the mold is clamped, and the E material is cast through the pouring port 13 so that the D material and the E material are attached to the inner surfaces of the upper mold 10 and the lower mold 11. D in the mold by absorbing the moisture of the material
Material and E material were integrally molded. Next, it is demolded and the sixth
As shown in the figure, a composite inorganic shaped body was obtained in which the E portion 21 '(core layer) derived from the E material was flat and wide inside the D portion 20' derived from the D material. Then, this shaped body was cured by autoclave curing to produce a lightweight composite inorganic plate made of two different materials.

[Brief description of drawings]

FIG. 1 is a sectional view showing an example of a casting mold used in the present invention,
2, 3, 4, and 5 are explanatory views showing an embodiment of the present invention, FIG. 6 is a sectional view showing a molding example of another embodiment of the present invention, and FIG. It is sectional drawing which shows the molded product of the conventional composite ceramics board. 10 ... Upper mold, 11 ... Lower mold, 13 ... Casting port, 16 ... B material, 17 ... A
Material, 18 ... C material

Claims (2)

[Claims] 1. A composite inorganic plate comprising a core layer and an outer peripheral layer on the outer periphery thereof, wherein the core layer is formed by press-fitting a material different from that of the outer peripheral layer from the bottom opening, and the outer peripheral direction is centered on the bottom opening. A composite inorganic plate characterized in that it is in a stretched state. 2. A step of preparing a pair of upper and lower casting molds in which a casting port is opened in the center of a shaping recess of the lower mold, a step of preparing n kinds of sludge, and a lower mold of the casting mold. To the outer peripheral layer forming step of sequentially pouring (n-1) kinds of sludge out of the above sludge, and after closing the lower mold and the upper mold, the remaining sludge of the above sludge is cast from the casting port of the lower mold. A method for producing a composite inorganic plate, comprising a core layer forming step and a hardening step of hardening the slurry.