JP2872063B2 - Manufacturing method of composite board - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite board of a heat insulating board and a cement-based building board used for a wall material of a building.

[0002]

2. Description of the Related Art Recently, a building board having a sound absorbing and heat insulating function has been provided to prevent noise from a building or to prevent dew condensation on a wall surface due to a temperature difference between inside and outside.

[0003]

2. Description of the Related Art Conventionally, as a building board having such heat insulating performance, a composite board in which a sound absorbing heat insulating board and a cement building board are bonded with an adhesive has been provided.

[0004]

The above-mentioned conventional composite board is manufactured by separately manufacturing a sound-absorbing heat-insulating board and a cement-based building board and bonding them together with an adhesive, but the manufacturing process becomes longer. Various manufacturing apparatuses are required, and there is a lot of waste of materials, so that the composite board cannot be provided at low cost.

[0005]

Means for Solving the Problems As a means for solving the above-mentioned conventional problems, the present invention applies an adhesive (4) to the surface of a sound-absorbing heat-insulating plate (2) and forms a cement-based hydraulic material thereover. A matting material (5) is formed by spraying a molding material, which is a mixture mainly composed of a reinforcing material, and then the matting (5) is watered.
The method of manufacturing a composite board (1) consisting of an insulating board (2) and a cement-based building board (3) that is cured by hardening together with a sound-absorbing insulating board (2) in the presence of To provide. The present invention will be described in detail below.

[Sound Absorbing Insulating Board] As the sound absorbing insulating board used in the present invention, for example, pulp, polyester fiber, polyamide fiber, acrylic fiber, acetate fiber,
Synthetic fibers such as polyethylene fiber and polypropylene fiber,
Natural fibers such as cotton, wool, palm fiber, bamboo fiber, hemp fiber,
Fiberboard, glass fiber, carbon fiber, ceramic fiber, fiberboard made of inorganic fibers such as rock wool bound by synthetic resin binder or needle punching, polystyrene,
There are porous plates such as foamed plates of plastics such as polyethylene, polypropylene, polyvinyl chloride, and polyurethane, wood wool cement plates, and porous inorganic plates such as porous calcium carbonate plates.

[Cement-based building board molding material] The cement-based building board molding material used in the present invention is mainly composed of a cement-based hydraulic material and a reinforcing material. Examples of the cement hydraulic material include one or a mixture of two or more of Portland cement, jet cement, blast furnace slag cement, fly ash cement, alumina cement, and the like. , Pulp fiber, defibrated paper, polyester fiber, polyamide fiber, acrylic fiber, acetate fiber,
Examples thereof include one or a mixture of two or more kinds of organic fibers such as polyethylene fibers and polypropylene fibers, and inorganic fibers such as glass fibers, carbon fibers, and ceramic fibers. Desirable stiffeners are wood chips 0.5-2.0 mm wide, 1-20 mm long, and 20-30 aspect ratio. In addition to the above components, in the present invention, silica cement powder, silica powder, silica fume, shirasu balloon, perlite, mica, diatomaceous earth, dolomite, gypsum, wollastonite, fly ash, instead of part of the cements Blast furnace slag, coal ash,
One or a mixture of two or more of the third components such as glass powder, siliceous clay, alumina, bentonite, calcium carbonate, and magnesium carbonate may be added. Further, a cement hardening accelerator such as calcium chloride, magnesium chloride, magnesium hydroxide, aluminum sulfate, sodium aluminate, and water glass, and a water repellent such as wax, paraffin, and silicon may be added. Further, a crushed scrap of a cement plate mainly composed of cement and reinforcing fibers may be added. In the above molding material, the cement-based hydraulic material usually has a content of about 30 to 60% by weight, and the reinforcing material has a content of about 15 to 30% by weight. To some extent.

[Manufacture of Composite Board] In the present invention, an adhesive is applied to the surface of the sound-absorbing heat insulating plate, and the molding material is sprayed on the adhesive. If the surface is not rough, it is desirable to roughen the surface with a demon roll or the like. And as the adhesive, for example, a vinyl acetate adhesive, a urethane-vinyl acetate adhesive, an ethylene-vinyl acetate adhesive, an acrylic adhesive, a synthetic rubber adhesive, a phenol adhesive, a melamine adhesive, There is an epoxy adhesive or the like. Then, in order to apply the adhesive to the surface of the sound absorbing heat insulating plate, for example, a roll coater,
Coating machines such as a knife coater, a flow coater and a spray gun are used. The application amount of the above molding material is usually 10 to 10.
20 kg / m ² . The mat formed in this manner is sandwiched between a template and the above-mentioned sound-absorbing heat-insulating plate, and is pressed by a press machine. At this time, the mold plate on the mat side may be provided with a predetermined uneven pattern. Then, the mat is cured in a state of being pressed together with the sound absorbing and insulating plate.
The curing condition is usually 50-80 ° C and 90-95% humidity
This is performed for 7 to 15 hours in an atmosphere of RH. The mat is hardened by the pressing and curing process to form a cement-based building board.

[0009]

According to the present invention, the cement-based building board (3) is manufactured on the sound-absorbing and heat-insulating board (2). Since the number of steps is also reduced, all the steps are greatly reduced. In addition, the number of manufacturing apparatuses is reduced by the reduced number of processes, the amount of cuts generated by cutting is reduced, and waste of materials is eliminated.
Further, the adhesive slightly penetrates into the mat (5) at the time of pressing, thereby improving the interlayer adhesive strength and bending strength of the obtained composite board.

[0010]

【Example】

Example 1 (manufacture of composite board) FIGS. 1 to 6 show a first example of the present invention. As shown in FIG. 1, a transport plate is placed on the line conveyor (11).
(12) is placed and transported one by one. The transport plate (12) is an iron plate or a stainless steel plate having a thickness of 3 to 6 mm. Then, as shown in FIG. 2, a sound absorbing heat insulating plate (2) is placed on the transport plate (12),
As shown in FIG. 3, an adhesive (4) is applied to the surface of the sound absorbing heat insulating plate (2) by a spray device (13).

A transport plate on which the sound absorbing and insulating plate (2) having the adhesive (4) coated on its surface is placed as described above.
(12) is transferred by a line conveyor (11) into a forming device (14) shown in FIG. The forming device (14)
Is a chamber (15), a molding material spraying port (16) provided at one end of the ceiling of the chamber (15), and a molding material spraying roll (17) provided at the molding material spraying port (16). A molding material supply sieve (19) that communicates with the molding material spraying roll (17) via a conveyor (18), a blowing chamber (20) provided at one end of the chamber (15), A blower (21) installed in the chamber (20), a duct (22) that is sent from the blower (21) and opens into the chamber (15), and is stretched in front of the duct (22). It comprises a pair of dispersion plates (23, 24) and an exhaust port (25) attached to the other end of the chamber (15).

The molding material M for cement-based building boards is supplied from a supply sieve (1
9) is sieved and deposited on a conveyor (18) and sent to the molding material spraying port (16) of the chamber (15), and the spraying port (16)
It is sprayed into the chamber (15) by a spraying roll (17). At this time, the blower (21) of the blower room (20) is operated to blow air from the duct (22) into the chamber (15). Then, the molding material M sprayed in the chamber (15) is selected by air by the above-mentioned blowing, and the coarse material is deposited on the opposite side (the left side in FIG. 4) with respect to the blowing direction in the chamber (15), and the fine material is deposited. Thing is deposited on the side of the air flow direction (right side in FIG. 4) in the chamber (15).

If the transport plate (12) is moved by the line conveyor (11) in the air blowing direction shown by the arrow (a), as shown in FIG. the molding material M ₁ is deposited Do, the upper deposited fine molding material M _2, as a result the lower side of the cementitious building board upper dense structure is obtained in crude, the inverse transport plate (12) if caused to move in the opposite direction to the blowing direction, deposited fine molding material M ₂ at the lower side of the mat is forming (5), crude molding material M ₁ is deposited on the upper, the As a result, a cement-based building board having a structure in which the lower side is dense and the upper side is coarse is obtained. However, in general, in order to obtain a cement-based building board having a structure in which the surface is dense, as shown in FIG. It is moved in the direction of a. After forming the mat (5) of the molding material M on the sound-absorbing heat insulating plate (2) via the adhesive (4) in this manner, the mat (5) is stacked with the transport plate (12) as shown in FIG. It is pressed by (25), cured in that state, and the mat (5) is hardened to obtain a cement-based building board (3).

In this way, a composite board (1) comprising a sound absorbing and heat insulating board (2) and a cement-based building board (3) as shown in FIG. 6 is manufactured by omitting the bonding step and minimizing the cutting step and the like. You can do it.

Example 2 (Performance of Composite Plate) A molding material M having the following composition is used. Portland cement 68.8 parts by weight Wood chip 28.7 マ グ ネ シ ウ ム Magnesium chloride (hardening accelerator) 1.4 パ ラ Paraffin (waterproofing agent) 1.1 〃 Water 40 〃 The above molding materials are mixed uniformly and shown in Example 1. Formed as a mat (5) on a sound-absorbing insulation board (2), pressed and hardened, and a cement-based building board with a thickness of 11 mm
(3), and the composite board (1) was manufactured. The sound absorbing and heat insulating board (2) used in this example was a 25 mm thick wood wool cement board, and an acrylic adhesive was used as the adhesive (4).

Comparative Example A cement-based building board having a thickness of 25 mm was manufactured in the same manner as in Example 2 except that the molding material having the same composition as in Example 2 was used and the sound-absorbing heat insulating board was omitted. A composite board was manufactured by bonding the wood wool cement board used in Example 2 with an epoxy adhesive.

Performance Evaluation Table 1 shows the results of evaluating the performance of the composite board of Example 2 and the composite board of the comparative example.

[Table 1]

According to Table 1, despite the use of an inexpensive acrylic adhesive in Example 2, the interlayer adhesion of the composite board is remarkably higher than that of the comparative example using an expensive epoxy adhesive. And the bending strength of the composite plate of Example 2 is much higher than that of the comparative example. Further, the specific gravity, the total thermal resistance value (insulation properties), and the sound absorption coefficient (sound absorption properties) of the composite plate of Example 2 are not different from those of the comparative example.

Embodiment 3 This embodiment is shown in FIGS. In this embodiment, connection paper (6A)
A sound absorbing and heat insulating plate (2A) provided with slits (7A) at predetermined intervals is set therein. The sound-absorbing heat insulating board (2A) can compress the thickness of a fiber board such as a glass fiber board or a soft plastic foam board such as a flexible polyurethane foam board. As shown in FIG. 8, an adhesive (4A) is applied to the surface of the sound-absorbing and heat-insulating plate (2A), and a molding material is sprayed thereon to form a mat (5A). Then, in this state, the upper and lower portions are sandwiched between the transport plates (12A) and are pressed and cured by a press device. The clamping pressure at the time of the above clamping is the sound absorbing heat insulating plate (2A)
Since the thickness can be compressed, it also affects the molding material M that has entered the slit (7A). After the curing, the transport plate (12A) is removed, and a composite building composed of a cement-based building board (3A) on which a reinforcing rib (8A) is formed as shown in FIG. A plate (1A) is manufactured.

[0020]

Therefore, according to the present invention, a building board having a sound absorbing function can be provided at extremely low cost.

[Brief description of the drawings]

 1 to 6 relate to a first embodiment of the present invention.

FIG. 1 is an explanatory view of a state where a transport plate is placed on a line conveyor.

FIG. 2 is an explanatory view showing a state in which a sound absorbing and insulating plate is placed on a transport plate.

FIG. 3 is an explanatory view of a step of applying an adhesive to the surface of the sound absorbing and insulating plate.

FIG. 4 is an explanatory view of a mat forming step.

FIG. 5 is an explanatory view of a compression step.

FIG. 6 is a partial sectional view of the obtained composite plate. FIGS. 7 to 9 relate to a second embodiment of the present invention.

FIG. 7 is an explanatory view of a state in which a sound absorbing heat insulating plate is placed on connection paper.

FIG. 8 is an explanatory view of a pressed state.

FIG. 9 is a partial cross-sectional view of the obtained composite plate.

[Explanation of symbols]

 1,1A Composite board 2,2A Sound insulation board 3,3A Cement-based building board 4,4A Adhesive 5,5A Mat

Claims (2)

(57) [Claims] An adhesive is applied to the surface of a sound-absorbing heat insulating plate, and a molding material, which is a mixture mainly composed of a cement-based hydraulic material and a reinforcing material, is sprayed on the adhesive to form a mat. A method for producing a composite board of a sound-absorbing heat insulating board and a cement-based building board, which is cured by hardening together with the sound-absorbing heat insulating board in the presence of moisture to obtain a cement-based building board. 2. The production of a composite board of a sound-absorbing insulating board and a cement-based building board according to claim 1, wherein said sound-absorbing insulating board is selected from a wood chip cement board, a glass fiber board, a porous inorganic board and a plastic foam board. Method