JPH0824754A - Production of heat-insulating fire-resisting panel - Google Patents

Abstract

PURPOSE:To level an adhesive and to easily coat a metallic skin with the adhesive in the form of a plane by bringing a coating nozzle close to the skin and retreating the nozzle from the skin by utilizing the pressure of the adhesive injected from the nozzle hole to form a gap. CONSTITUTION:The upper and lower metallic skins (a) and (b) are continuously supplied at a distance from each other, the opposed faces are coated with an adhesive, and a heat-insulating fire-resisting core is placed in-between. The skins (a) and (b) are pressed on both faces of the core and adhered to each other, and then the assembly is cut to a specified length. In this case, a coating nozzle 2 is provided in mid-way of the skins (a) and (b) of transportation, and a nozzle hole 3 is bored in the nozzle. Meanwhile, the nozzle 2 is brought close to the skins (a) and (b), and the nozzle 2 is retreated from the skins (a) and (b) by the pressure of the adhesive injected from the nozzle hole 3 to form a gap (d). As a result, the adhesive is leveled, and the skins (a) and (b) are coated with the adhesive in the form of a plane.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a heat-insulating refractory panel, and more particularly, to apply an adhesive agent to the opposing surfaces of the upper and lower metal skins that are continuously supplied in a planar manner. The present invention relates to a technique in which the surface is leveled and even if a coating nozzle having a large number of nozzle holes is used, planar coating can be easily performed and the thickness of the adhesive can be easily changed.

[0002]

2. Description of the Related Art Conventionally, in a method for manufacturing a heat-insulating refractory panel, a plurality of rolls are provided above and below a metal skin to be conveyed in order to apply an adhesive to the facing surfaces of the upper and lower metal skins that are continuously supplied. A roll coater to be arranged, or a coating nozzle is arranged long in a direction substantially orthogonal to the direction of transport of the metal skin, and a large number of nozzle holes are formed in this coating nozzle at a small interval in the length direction. There is a flow coater or the like in which long nozzle holes are formed in a slit shape in the application nozzle and an adhesive is ejected from these nozzle holes to apply the adhesive to the upper surface of the metal skin.

[0003]

By the way, in a roll coater, a pair of coating rolls facing each other and a receiving roll arranged below the metal outer cover are required,
The structure becomes complicated, and when using a roll coater, roll transfer occurs, and transfer failure easily occurs due to curing of the adhesive, etc., making it difficult to apply for a long time. Then, in the bead coating in which the adhesive is ejected from the nozzle hole of the circular hole to apply the adhesive, the adhesive ejected from each nozzle hole is applied in a line shape, and the adhesive is applied to the metal skin in a planar manner. However, it is difficult to perform leveling to flatten it. Further, in a flow coater in which a strip-shaped nozzle hole is used to apply the adhesive in a strip shape, the adhesive can be applied in a planar shape, but leveling for leveling the upper surface of the adhesive is not possible.
Further, the adhesive cannot be applied to the lower surface of the upper metal skin.

By the way, in a building material such as a roofing material or a wall material in which a heat insulation material is lined with an adhesive on a metal skin, when the adhesive is applied in a streak shape, the building material is piled up outdoors. Then, dew condensation water or the like enters the gaps between the adjacent strip-shaped adhesives to separate the heat insulating material from the metal skin or deteriorate the heat insulating material. The present invention has been made in view of the above problems, and an object thereof is to apply an adhesive to a metal skin in a planar manner, by uniformly arranging the upper surface of the applied adhesive well. Leveling can be done, even if
The adhesive can be applied to the metal skin with a substantially uniform thickness while using a coating nozzle having a large number of circular hole holes. It is an object of the present invention to provide a method for manufacturing a heat-insulating fire-resistant panel in which an adhesive can be applied to the lower surface of the outer skin from below and the thickness of the adhesive can be easily changed.

[0005]

According to the first aspect of the present invention, the upper and lower metal skins a and b are continuously supplied with a vertical interval, and are provided on the lower surface of the upper metal skin a and the upper surface of the lower metal skin b. An adhesive is applied, the heat-insulating fire-resistant core material 12 is loaded between the upper and lower metal skins a and b, and the metal skins a and b are pressed and adhered to the upper and lower surfaces of the heat-insulating fire-resistant core material 12, and thereafter, a predetermined amount. A method for manufacturing an insulating fire-resistant panel, which is cut into lengths,
To apply the adhesive to the metal skins a and b,
The coating nozzles 2, 2 are arranged in the middle of the conveyance of b, and the nozzle hole 3 for ejecting the adhesive at a predetermined pressure is formed in the coating nozzle 2, and the coating nozzle 2 is brought close to the metal skins a, b to be conveyed. Then, the application pressure of the adhesive agent ejected from the nozzle holes 3 is slightly retracted from the metal outer skins a and b to form a slight gap d with respect to the metal outer skins a and b. It is characterized in that the ejected adhesive is evenly applied to the metal skins a and b in a planar manner.

According to a second aspect of the present invention, the coating nozzle 2 is brought into contact with the metal skins a and b to be conveyed. In the third aspect, the nozzle holes 3 are circular holes, and the nozzle holes 3 are formed in large numbers at appropriate intervals in a direction substantially orthogonal to the transport direction of the metal outer skins a and b, and ejected from each nozzle hole 3. The adhesive is applied in a planar manner.

According to a fourth aspect of the present invention, the coating nozzle 2 having a substantially semicircular cross section is used.

[0008]

According to the first aspect of the present invention, the coating nozzle 2 is brought close to the metal skins a and b, and the pressure of the adhesive sprayed from the nozzle holes 3 is received by the metal skins a and b. The coating nozzle 2 retracts from the metal skins a and b to form a predetermined gap d between the metal skins a and b due to the ejection pressure. The adhesive ejected from the nozzle holes 3 in such a gap d is applied to the metal skins a and b in a planar shape and in a thickness substantially equivalent to the thickness of the gap d. In this way, the coating nozzle 2 is brought close to the metal skins a and b, and the coating nozzle 2 is retracted from the metal skins a and b to form the gap d due to the pressure received by the pressure of ejecting the adhesive. In such a gap d, the adhesive is leveled in a plane and the metal skin a,
By applying to b, the drop of the adhesive is avoided, and the adhesive is applied well to the upper surface of the metal outer skin b being conveyed from above. In addition, the lower surface of the upper metal skin a is well coated from below. Thus, it is particularly effective in the method of manufacturing the heat-insulating refractory panel A. Then, by changing the pressure at which the adhesive is ejected from the nozzle hole 3, the adhesive is ejected to the metal skins a and b, so that the coating nozzle 2
Changes the gap d away from the metal skins a and b. Therefore, the coating thickness of the adhesive can be easily changed.

According to the second aspect of the present invention, the coating nozzle 2 is brought into contact with the conveyed metal skins a and b so that the nozzle holes 3 are closed when the adhesive is not ejected. In the third aspect, the adhesives ejected from the nozzle holes 3 of each circular hole are received by the metal casings a and b with respect to the metal casings a and b, and the ejected adhesives are received. A predetermined gap d is formed in the coating nozzle 2 from the metal skins a and b by receiving pressure. In this way, the adhesive ejected by the application nozzle 2 held by the pressure receiving force is compressed, and the adhesive from the nozzle holes 3 ... of the adjacent circular holes is connected to eject the adhesive in a planar manner. It is evenly applied to a thickness corresponding to the gap d caused by pressure.

According to the present invention, by using the coating nozzle 2 having a substantially semicircular cross section, the coating nozzle 2 having a substantially semicircular cross section is used to perform coating such as a roll coater for leveling the adhesive. The adhesive can be smoothed.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 and 5 are explanatory views of the production line of the heat-insulating refractory panel A, in which the upper metal skin a supplied from the supply device 4 is molded by the first molding machine 5 and supplied from the supply device 6. The lower metal outer cover b is molded by the second molding machine 7, and the adhesive coating device 8 on the downstream side of these molding machines 5, 7
In 8, the adhesive is applied to the metal skins a and b, and a preformed inorganic material 9 such as calcium silicate is inserted into the line, and a preformed mineral such as rock wool. In the double conveyor device 11 in which the fiber material 10 is inserted in the line and the molding conveyors are provided on the upper and lower sides, the metal outer shells a and b are molded and mounted from above and below the heat-insulating refractory core material 12, and,
The cutting part 13 is cut into a predetermined length so that the heat-insulating refractory panel A can be continuously produced.

In the adhesive coating device 8, the coating nozzle 2 is arranged on the lower surface of the upper metal outer cover a and on the upper surface of the lower metal outer cover b. These coating nozzles 2 are held by a cylinder 16 so as to be able to move up and down by connecting a spring 14 to a base 15. That is, when the cylinder 16 expands and contracts, the coating nozzle 2 is moved up and down with respect to the base 15 through the spring 14, and at the elevating position, the spring 14 can be expanded and contracted to slightly change the vertical position. There is. In this way, the application nozzle 2 is moved up and down to change its position largely, and the spring 14 expands and contracts due to the load applied to the application nozzle 2 at the elevating position to allow a slight displacement of the position of the application nozzle 2. In addition, various things can be considered.

As shown in FIG. 6, pressure air is blown into the drum can 18 filled with the adhesive, and the adhesive is applied to the coating nozzle 2 through the pump unit 19 and the hose 21 equipped with the heater 20 by the pressure air. It is something that is supplied. The coating nozzle 2 can be connected and lengthened if necessary. By the way, the adhesive is a one-component urethane type, the viscosity is 2000 to 3000 cps, the coating amount is 400 g / m ² , and water is used as the curing agent. Also,
The nozzle holes 3 have a pitch P of 3 mm and a hole diameter D of 2 mm. The formed gap d is about 0.02 mm to 0.03 mm.

Then, as shown in FIG. 3, the coating nozzle 2 on the upper surface side of the lower metal skin b is brought into contact with the metal skin b by the extension of the cylinder 16. Then, the pressure-sensitive adhesive is ejected from a large number of nozzle holes 3 at a set pressure, and the ejected adhesive is received by the metal skin b received by the receiving roll 17 At
The coating nozzle 2 compresses the spring 14 so that the metal skin b
And a predetermined gap d due to the jet pressure is formed between the metal outer cover b and the metal outer cover b. In such a gap d, the adhesive ejected from a large number of nozzle holes 3 ... Is planarly formed on the arc surface of the coating nozzle 2 formed in a substantially semicircular cross section, and the gap d is formed.
Is applied to the metal skins a and b in a thickness equivalent to the above. Then, as shown in FIG. 4, in order to apply the adhesive to the lower surface of the upper metal skin a, the coating nozzle 2 disposed below the upper metal skin a is extended by the cylinder 16 to extend the metal skin. The same operation is performed by bringing the adhesive into contact with a, applying the adhesive, and retracting the application nozzle 2 by the ejection pressure to form the gap d. Then, in this way, the coating nozzle 2 is brought into contact with the metal outer cover a, and the coating nozzle 2 is retracted from the metal outer cover a by the pressure received due to the pressure of ejecting the adhesive to form the gap d. Since the adhesive is applied evenly on the metal outer cover a in the gap d, the adhesive dripping can be avoided, and the lower surface of the conveyed metal outer cover a can be applied well from below. .

Although the nozzle hole 3 is a circular hole in the embodiment, it may be formed in a slit shape which is long in the length direction of the coating nozzle 2, and as shown in FIG. 6 (b). For example, the shape and form of the large-diameter holes and the small-diameter holes can be changed in a staggered manner. In FIG. 6 (b), the symbol H indicates the coating width. Further, in the embodiment, the coating nozzle 2 is brought into contact with the metal skins a and b, and the gap d is formed by the pressure of the adhesive agent jetted from the nozzle hole 3.
A gap smaller than the gap d may be formed in the coating nozzle 2 with respect to the metal skins a and b, and the gap d may be formed by the subsequent ejection pressure of the adhesive.

FIG. 7 is a sectional view of the heat-insulating refractory panel A with a part thereof omitted, wherein a fitting recess 24 is formed at one end in the width direction.
However, the fitting convex portion 25 is formed at the other end portion. The shape and form of the heat-insulating refractory panel A can be modified in various ways.

[0017]

According to the first aspect of the present invention, the coating nozzle is arranged in the middle of the transportation of the metal shell, and the coating nozzle is formed with the nozzle hole for ejecting the adhesive at a predetermined pressure. Adhesive ejected from the nozzle hole by making the application nozzle slightly retreat from the metal outer cover by the ejection pressure of the adhesive ejected from the nozzle hole to form a slight gap with respect to the metal outer cover Since the adhesive is applied evenly to the metal skin and the adhesive is applied in a planar manner, the coating nozzle is brought close to the metal skin, and the pressure received due to the adhesive ejected from the nozzle hole being received by the metal skin. At this time, the coating nozzle retracts from the metal outer skin to form a predetermined gap due to the jet pressure with the metal outer skin, and the adhesive ejected from the nozzle hole in such a gap is formed into a planar shape and a gap. Equivalent thickness There is an advantage that smoothed to a thickness of substantially uniform may be applied to the metal tube in the. Moreover, in this way, the application nozzle is brought close to the metal outer cover, and the application nozzle is retracted from the metal outer cover by the pressure received due to the pressure of ejecting the adhesive to form a gap, and the adhesive is applied in such a gap. Since it is evenly applied to the surface and applied to the metal skin,
It is possible to avoid dripping of the adhesive, and it is possible to satisfactorily apply even from the lower surface of the upper metal skin that is being conveyed, which is particularly effective in the method for manufacturing a heat-resistant fireproof panel. . Moreover, by changing the pressure at which the adhesive is ejected from the nozzle hole, it is possible to change the gap at which the coating nozzle separates from the metal outer skin due to the fact that the adhesive is ejected onto the metal outer skin. There is an advantage that the coating thickness of the agent can be easily changed.

According to the second aspect of the present invention, since the coating nozzle is brought into contact with the metal skin to be conveyed, there is an advantage that the nozzle hole can be closed when the adhesive is not ejected. According to another aspect of the present invention, the nozzle holes are circular holes, and a large number of nozzle holes are formed at appropriate intervals in a direction substantially orthogonal to the transport direction of the metal shell, and the adhesive ejected from each nozzle hole is a surface. Since it is applied in a circular shape, the adhesive that is ejected from the nozzle holes of each circular hole is received by the metal outer skin, and the application nozzle is pressed by the pressure that is received by the ejected adhesive. A predetermined gap is formed, and the adhesive ejected by the application nozzle held by the pressure receiving force is compressed, and the adhesive from the nozzle holes of the adjacent circular holes is connected to form the adhesive on the surface. There is an advantage that it can be applied in a uniform shape to a thickness corresponding to the gap caused by the ejection pressure.

According to the present invention, since the coating nozzle having a substantially semicircular cross section is used, the coating can be performed by a coating roller such as a roll coater for leveling the adhesive with the coating nozzle having a substantially semicircular cross section. There is an advantage that the leveling action of the agent can be performed well.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view showing a production line according to an embodiment of the present invention.

2A is a partial front view with a partial cross section, FIG. 2B is a side sectional view, FIG. 2C is a bottom view, and FIG. 2D is a perspective view.

3 (a), (b) and (c) are explanatory views showing an operation of applying an adhesive to the lower metal outer cover of the above.

4 (a), (b) and (c) are explanatory views showing an operation of applying an adhesive to the metal skin as above.

FIG. 5 is a schematic explanatory view showing the above production line.

FIG. 6A is an explanatory view of the coating apparatus of the above, and FIG. 6B is a bottom view of another embodiment of the coating nozzle.

FIG. 7 is a cross-sectional view of the heat-insulating refractory panel of the above with a part thereof omitted.

[Explanation of symbols]

 a metal skin b metal skin 2 coating nozzle 3 nozzle hole d gap

Claims (4)

[Claims] 1. The upper and lower metal skins are continuously supplied with a vertical gap, and an adhesive is applied to the lower surface of the upper metal skin and the upper surface of the lower metal skin, and an adiabatic fireproof core is provided between the upper and lower metal skins. A method for manufacturing a heat-insulating fire-resistant panel in which a metal shell is pressed and adhered to the upper and lower surfaces of a heat-insulating fire-resistant core material after being loaded with a material, and then cut to a predetermined length, wherein an adhesive is applied to the metal skin. In addition, a coating nozzle is arranged in the middle of transporting the metal skin, and a nozzle hole for ejecting the adhesive at a predetermined pressure is formed in the coating nozzle. The application pressure of the ejected adhesive causes the coating nozzle to slightly retract from the metal skin to form a slight gap with respect to the metal skin, thereby evenly adhering the adhesive sprayed from the nozzle holes to the metal skin. Applying the agent on the surface A method for manufacturing a heat-insulating refractory panel, comprising: 2. The method for manufacturing an adiabatic refractory panel according to claim 1, wherein the coating nozzle is brought into contact with a metal skin to be conveyed. 3. The nozzle holes are circular holes, and a large number of nozzle holes are formed at appropriate intervals in a direction substantially orthogonal to the transport direction of the metal outer cover, and the adhesive agent ejected from each nozzle hole is formed into a planar shape. The method for producing a heat-insulating fire-resistant panel according to claim 1, wherein the heat-resistant fire-resistant panel is applied onto 4. The method for manufacturing a heat-insulating fire-resistant panel according to claim 1, wherein a coating nozzle having a substantially semicircular cross section is used.