JP2003261996A - Thermal insulating panel and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thermal insulating panel whose fire protecting performance hardly lowers even when exposed to a big flame for a long time. <P>SOLUTION: The thermal insulating panel comprises a front side metal plate 2, a reverse side metal plate 1, and a thermal insulating material 3 of foamed resin which fills the gap between the metal plates. A thermal expansion layer 10, which is expanded by heat, is arranged along the reverse side metal plate 1. By expanding the thermal expansion layer 10 by heat of a fire and the like, cracks of the thermal insulating material 3 due to shrinkage thereof which is caused by a fire and the like may be filled with the expanded thermal expansion layer 10. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat insulating panel used as a wall material or a roof material and a method for manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, there has been provided a heat insulating panel having an improved heat insulating property by filling a heat insulating material between a pair of metal plates arranged to face each other. Foamed resin such as polyisocyanurate foam or polyurethane foam or inorganic fiber such as rock wool or glass wool is used as the heat insulating material of such a panel, but from the viewpoint of ease of production and light weight, the heat insulating material of foamed resin is used. Is commonly used.

[0003]

However, the heat insulating panel using the foamed resin as the heat insulating material is deteriorated by carbonization of the heat insulating material when exposed to a large amount of flame for a long time during a fire. As a result, there is a problem that cracks are generated in the heat insulating material due to shrinkage and the fire prevention performance is deteriorated.

The present invention has been made in view of the above points, and an object of the present invention is to provide a heat insulating panel in which the fireproof performance is not easily deteriorated even when exposed to a large amount of flame for a long time, and a manufacturing method thereof. To do.

[0005]

A heat insulating panel A according to claim 1 of the present invention is formed by filling a heat insulating material 3 made of foamed resin between a front metal plate 2 and a back metal plate 1. The heat-expandable layer 10 which is expanded by heat is provided along the back metal plate 1, and when the heat-expandable layer 10 is expanded by heat during a fire, 4 due to shrinkage of heat insulating material 3
3 can be filled with the expanded heat-expandable layer 10, and even if exposed to a large amount of flame for a long time, the fire prevention performance is less likely to deteriorate.

Further, in addition to the first aspect, the heat insulating panel A according to the second aspect of the present invention has a foamed resin and inorganic foamed particles 4 in addition to the first aspect.
Is formed on the heat insulating material 3, and the fire resistant layer 5 contains the inorganic foamed particles 4 which are less likely to be deteriorated by heat than the heat insulating material 3 of the foamed resin. It is possible to improve the fire prevention performance as compared with the heat insulating material 3 only, and to make the foamed resin adhere to the periphery of the foamed inorganic particle 4 by causing the foamed resin 4 to act as the core of the foamed resin for a long time. Even when exposed to a large amount of flame, it is possible to prevent the heat insulating material 3 from cracking due to deterioration, and it is more difficult for the fire prevention performance to decrease.

Further, the heat insulating panel A according to a third aspect of the present invention is characterized in that, in addition to the first or second aspect, the heat-expandable layer 10 and the heat insulating material 3 are brought into close contact with each other. ,
The expanded heat-expandable layer 10 is likely to be filled in the cracks 43 due to the contraction of the heat insulating material 3 caused at the time of fire, and the fire prevention performance is less likely to be deteriorated.

A heat insulating panel A according to claim 4 of the present invention is characterized in that, in addition to any one of claims 1 to 3, the foamed resin is polyisocyanurate foam. Insulation material with higher fire resistance than other foamed resins such as polystyrene and polystyrene foam 3
Can be formed, and further, the fire prevention performance is less likely to deteriorate.

In the method of manufacturing the heat insulating panel A according to the fifth aspect of the present invention, the raw material liquid 6 of the foaming resin is injected between the front surface metal plate 2 and the back surface metal plate 1, and the injected raw material liquid 6 is foamed. In the method for manufacturing the heat insulating panel A in which the heat insulating material 3 made of foamed resin is formed by the method, the heat expanding layer 10 that expands by heat is provided along the back metal plate 1, and the heat expanding layer is formed. By manufacturing the heat-insulating panel A containing 10 therein, the heat-expandable layer 10 is expanded by the heat at the time of fire or the like and expanded into the crack 43 due to the shrinkage of the heat insulating material 3 caused at the time of the fire or the like. Can be filled, and even if exposed to a large amount of flame for a long time, the fire prevention performance is less likely to deteriorate.

In addition to the method of manufacturing the heat insulating panel A according to claim 6 of the present invention, in addition to the method of manufacturing the heat insulating panel A, the inorganic expanded particles 4 are also included.
The refractory layer 5 in which the foamed resin and the inorganic foamed particles 4 are mixed by foaming the raw material liquid 6 in which the heat-insulating material 3 is dispersed.
The heat-resistant layer 5 containing the inorganic foamed particles 4 that is less likely to be deteriorated by heat than the heat-insulating material 3 of the foamed resin is manufactured by manufacturing the heat-insulating panel A containing the fire-resistant layer 5. The fireproof performance can be improved as compared with the heat insulating material 3 made of only the foamed resin, and the inorganic foamed particles 4 are caused to act as the core of the foamed resin.
It is possible to prevent cracks due to deterioration of the heat insulating material 3 even if exposed to a large amount of flame for a long time by closely adhering the foamed resin to the periphery of the, and it is more difficult for the fire prevention performance to decrease. is there.

Further, in the method for producing a heat insulating panel A according to a seventh aspect of the present invention, in addition to the fifth or sixth aspect, 5 to 40% by volume of the inorganic foamed particles 4 are dispersed in the raw material liquid 6. Which is capable of forming a fire-resistant layer 5 having high adhesiveness to the heat-expandable layer 10 and high fireproof performance, and capable of forming a heat insulating panel A having high strength and fireproof performance. Is.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below.

FIG. 1 shows an example of the heat insulating panel A of the present invention. The heat insulating panel A is formed to have a thickness of 25 to 60 mm, for example, and the front surface metal plate 2 and the back surface metal plate 1 are arranged to face each other.
A heat-insulating material 3 made of foamed resin is filled between the heat-insulating material 3 and the heat-insulating layer 10 formed between the heat-insulating material 3 and the inner surface of the back metal plate 1 along the inner surface of the back metal plate 1. Is. Further, the convex portion 7 is provided on one side end portion of the heat insulating panel and the convex portion 7 is provided on the other side end portion of the heat insulating panel.
Is provided with a recess 8 which can be fitted with.

The front metal plate 2 and the back metal plate 1 are a zinc iron plate, an aluminum plate, a zinc plated steel plate, an aluminum zinc alloy plated steel plate, a stainless steel plate, a titanium steel plate, etc., or these metal plates colored with a general paint. A material coated with vinyl chloride resin, acrylic resin, fluororesin, or the like can be used.

The heat insulating material 3 is formed of a foamed resin such as polyisocyanurate foam, polystyrene foam or polyurethane foam. Among these, it is preferable to form the heat insulating material 3 with a polyisocyanurate foam, which can enhance the fire protection performance as compared with the case of using other foamed resin. The above foamed resin is formed by a known method. For example, in the case of polyisocyanurate foam, isocyanate such as diphenylmethane diisocyanate, polyol such as ethylene glycol, and triethyl potassium hexanoate are used. A method of heating and foaming the raw material liquid 6 prepared by mixing a quantification catalyst and a foaming agent such as n-pentane or water can be adopted.

The heat-expandable layer 10 is a layer whose thickness expands 5 to 40 times when heated by heat such as fire. Such a heat-expandable layer 10 can be formed of a heat-expandable sheet or a heat-expandable paint.

When the heat-expandable layer 10 is formed of a heat-expandable sheet, JP-A No. 11-323148 and JP-A No. 20323/1999.
The fire-resistant sheet-shaped molded products described in JP-A-00-319413 and JP-A-2000-1927 can be used. This heat-expandable sheet is a thin sheet plastic refractory material, and contains rubber substances such as butyl rubber, phosphorus compounds such as red phosphorus, graphite neutralized with ammonia and the like, and inorganic fillers such as calcium hydroxide. A graphite-containing butyl rubber sheet comprising a resin composition containing, for example, a composition comprising 8 parts by mass of graphite, 26 parts by mass of butyl rubber, and the balance being an inorganic filler,
It expands when heated to 200 ° C or higher. As this heat-expandable sheet, specifically, "Fiblock" manufactured by Sekisui Chemical Co., Ltd. can be used.
It is not limited to this.

On the other hand, the heat-expandable paint for forming the heat-expandable layer 10 is called a foam-type fire-resistant paint,
For example, a mixture of a foaming agent, a carbonizing agent, a reaction catalyst, a binder, a pigment and the like can be used. Examples of the foaming agent include ammonium phosphate such as ammonium salt, ammonium polyphosphate, and melamine phosphate, and amino compounds such as dicyanamide, urea, and melamine.
Others such as chlorinated paraffin can be used. As the carbonizing agent, for example, starch may be starch, dextrin, sugar or the like, polyhydric alcohol may be mono-, di-, or tetrapentaerythritol, or a resinous substance. As the above reaction catalyst, ammonium phosphate, ammonium polyphosphate, melamine phosphate, etc. can be used. Also,
As the above-mentioned binder, for example, a synthetic resin emulsion can be used in the water system, and alkyd, vinyl chloride, urethane, epoxy resin and the like can be used in the solvent system. Also,
As the above-mentioned pigment, titanium oxide, an extender pigment, a coloring pigment, or the like can be used. As such a heat-expandable coating material (foaming type fire-resistant coating material), “Tikalit S-100” manufactured by Nippon Paint Co., Ltd. can be specifically used, but it is not limited thereto.

As shown in FIG. 2, the heat-expandable layer 10 adheres to the inner surface of the rear surface metal plate 1 (the metal plate facing the indoor side when the heat insulating panel A is installed as the outer wall material). In addition, the other surface is provided in close contact with the surface of the heat insulating material 3. The thickness of the heat-expandable layer 10 can be formed to, for example, 0.3 to 5 mm, but is not limited thereto.

In the heat insulation panel A as described above, as shown in FIG.
As shown in, when the surface metal plate 2 side (outdoor side when the heat insulating panel A is installed as the outer wall material) is exposed to a large amount of flame 42 for a long time during a fire or the like, the heat insulating material 3 is carbonized. Then, the heat insulating material 3 is deteriorated and cracks 43 are generated in the heat insulating material 3 due to shrinkage. In the present invention, the thermal expansion layer 10 is provided between the front surface metal plate 2 and the back surface metal plate 1 along the inner surface of the back surface metal plate 1. Since it is provided, the heat-expandable layer 1 is heated by the flame 42.
0 expands and fills the cracks 43 of the heat insulating material 3. For this reason, the cracks 43 are closed by the expanded heat-expandable layer 10, and the heat of the flame 42 passes through the cracks 43. The heat of the flame 42 does not easily reach the indoor side. As a result, a large amount of flame 42
Even if it is exposed to, the fireproof performance of the heat insulating panel A is less likely to deteriorate.

As described above, according to the present invention, the heat insulating material 3 is used in the event of a fire or the like.
The cracks 43 of FIG. Therefore, it is preferable to dispose the heat-expandable layer 10 in close contact with the heat insulating material 3, and this makes it easier for the expanded heat-expandable layer 10 to be filled in the cracks 43 of the heat insulating material 3 in the event of a fire or the like. .

FIG. 4 shows an example of an apparatus for manufacturing the above heat insulating panel A. This manufacturing apparatus includes a metal plate forming unit 40 and a filling unit 4.
1 and a finishing section 44. The metal plate forming part 40 includes the strip metal plate 25, the front metal plate 2 and the back metal plate 1 described above.
Where the payoff reels 10a, 10
Two strip-shaped metal plates 25 arranged above and below b are pulled out by the pinch rollers 12a and 12b, and both side edges of the pulled-out strip-shaped metal plate 25 are folded back by the molding machines 11a and 11b to form the convex portion 7 And a long surface metal plate 2 by forming a portion corresponding to the recessed portion 8 and, if necessary, providing unevenness on the entire surface of the strip-shaped metal plate 25 to form a surface pattern or the like of the heat insulating panel A. This is the part where the back metal plate 1 is formed. The long front surface metal plate 2 and the back surface metal plate 1 formed in this manner are continuously advanced and transferred to the filling section 41 by a transfer means such as a support roller 13. Reference numeral 29 in the figure is a shear.

The filling portion 41 is a portion for filling the raw material liquid 6 of the foamed resin between the long front surface metal plate 2 and the rear surface metal plate 1, and the heat insulating material 3 formed from the raw material liquid 6 and the surface. A preheater 15 for preheating the front surface metal plate 2 and the back surface metal plate 1 to an optimum temperature of 30 to 80 ° C. in order to improve the adhesiveness between the metal plate 2 and the back surface metal plate 1, and the front surface metal plate 2 and the back surface metal plate. 1. The raw material liquid 6 is injected between the metal plates 1 and 2 which are reciprocally moved in the width direction (widthwise direction) of 1 to be vertically opposed to each other.
Gantry 16 equipped with spray nozzles 31 for evenly spraying and injecting at ~ 60 kg / m ³ , and a sheet feeder for feeding the thermally expandable layer 10 to the lower surface of the backside metal plate 1 conveyed on the upper side. 45, a double conveyor 17 for setting a predetermined interval between the front surface metal plate 2 and the rear surface metal plate 1 that are arranged to face each other, and the front surface metal plate 2 and the rear surface metal plate 1 that accommodate the double conveyor 17 And a heating device 28 for heating the raw material liquid 6 injected in between.

As shown in FIG. 5, the double conveyor 17 includes a pair of upper and lower conveyors 17a and 17b, and the conveyors 17a and 17b are vertically movable by a hydraulic cylinder or the like. In order to set the vertical distance between the metal plates 1 and 2 to a predetermined size using this double conveyor 17, a pair of upper and lower front metal plates 2 and back metal plates 1 are introduced between the conveyors 17a and 17b, and By moving 17a and 17b up and down respectively to change the vertical distance, the front metal plate 2 and the back metal plate 1
Is pressed to change the vertical distance between the front surface metal plate 2 and the rear surface metal plate 1. Therefore, the double conveyor 17 has a structure capable of withstanding the foaming pressure of the raw material liquid 6 so as not to be damaged by the foaming of the raw material liquid 6.

The finishing part 44 is a part for finishing the heat insulating panel A from the heat insulating panel original plate 27 formed by the filling part 41, and is a width / thickness gauge for measuring the width dimension and the thickness dimension of the heat insulating panel original plate 27. 19, a cross cutting machine 20 for cutting the heat insulating panel original plate 27 into a predetermined size under the control of the process computer, and a reject for controlling and stacking the heat insulating panel A in accordance with the length and the number of packing sheets. It has a piler 22 and a piler 24.

Then, the above heat insulating panel A is manufactured as follows. First, as described above, the elongated front surface metal plate 2 and the rear surface metal plate 1 are formed from the strip-shaped metal plate 25 in the metal plate forming unit 40, and the long front surface metal plate 2 and the rear surface metal plate 1 are vertically moved. The front surface metal plate 2 and the back surface metal plate 1 are introduced from the metal plate forming section 40 into the filling section 41 by being advanced and conveyed in a state of being opposed to. Next, the thermally expandable layer 1 is formed on the lower surface of the back surface metal plate 1 introduced into the filling portion 41.
0 is adhered and stuck by its adhesiveness or an adhesive or the like if necessary. In the case of FIG. 4, the heat-expandable layer 10 is formed of a heat-expandable sheet, but when the heat-expandable layer 10 is formed of a heat-expandable paint (foam-type fireproof paint), it is formed on the lower surface of the back metal plate 1. Apply heat-expandable paint. Next, the front metal plate 2 and the back metal plate 1 are passed through the preheater 15 to be heated. Next, as shown in FIG. 5, the heated front metal plate 2 and back metal plate 1 are advanced to the gantry 16, where the spray nozzle 31 located between the front metal plate 2 and the back metal plate 1 is used. By spraying the creamy raw material liquid 6 toward the upper surface of the lower metal plate 2, the raw material liquid 6 is supplied between the long front surface metal plate 2 and the rear surface metal plate 1.

After supplying the raw material liquid 6 as described above,
As shown in FIG. 5, the front surface metal plate 2 and the back surface metal plate 1 are continuously introduced between the upper and lower conveyors 17a and 17b with the raw material liquid 6 interposed, and the front surface metal plate 2 and the back surface are heated by the heating device 28. The raw material liquid 6 between the metal plates 1 is heated to 40 to 50 ° C. As a result, the raw material liquid 6 reacts (in the case of polyisocyanurate foam, the isocyanate and the polyol in the raw material liquid 6 react in the presence of the trimerization catalyst), and at the same time, the foaming agent foams and cures, thereby foaming. A resin heat insulating material 3 is formed between the front surface metal plate 2 and the back surface metal plate 1 (between the thermal expansion layer 10 attached to the back surface metal plate 1 and the upper surface of the front surface metal plate 2). In this way, the heat insulating panel original plate 27 in which the heat insulating material 3 is filled between the front surface metal plate 2 and the back surface metal plate 1 is continuously formed.

The filling section 41 is provided with a side seal conveyor (not shown) which operates in synchronization with the double conveyor 17, and the front side metal plate 2 and the back side metal plate introduced into the double conveyor 17 by this side seal conveyor. 1 is positionally adjusted in the width direction. Further, by the side seal conveyor, the strip-shaped seal packing 39 is supplied to the concave portions 8 of the front surface metal plate 2 and the rear surface metal plate 1, and the moisture-proof paper strip (not shown) is continuously supplied to the convex portions 7. The seal packing 39 and the moisture-proof paper strip prevent the raw material liquid 6 being foamed and cured from flowing out between the front metal plate 2 and the rear metal plate 1.

Thereafter, the heat insulating panel original plate 27 is attached to the finishing section 4
Introduce to 4. Here, the dimensions of the heat insulation panel original plate 27 are measured by the width / thickness gauge 19, and then the heat insulation panel original plate 27 is cut into a predetermined size by the cutting machine 20 controlled by the process computer. A heat insulating panel A as shown in can be formed. afterwards,
The heat insulation panel A is laminated by controlling the length and the unit of the number of packages by an automatic loading device such as the reject pillar 22 and the pillar 24. In addition, it is preferable that the line speed (the speed of feeding the front metal plate 2 and the back metal plate 1) of the above-mentioned manufacturing apparatus is 5.0 to 15.0 m / min.

FIG. 6 shows another embodiment. In this heat insulating panel A, the heat insulating material 3 is formed in a two-layer structure in which the foam single layer 9 and the fireproof layer 5 are laminated in the thickness direction of the heat insulating panel A in FIG. The heat-expandable layer 10 is interposed between the layers 5, and the other structures are formed in the same manner as the above-mentioned embodiment. Therefore, the refractory layer 5 includes the heat-expandable layer 10 and the back metal plate 1.
It is formed between and. The foam unit layer 9 is composed only of the foamed resin similar to that described above, and the fire resistant layer 5
Is composed of a mixed layer in which the foamed resin and the inorganic foamed particles 4 are mixed.

Also in this heat insulating panel A, when the surface metal plate 2 side (outdoor side when the heat insulating panel A is installed as an outer wall material) is exposed to a large amount of flame 42 for a long time in case of fire or the like. The foam single layer 9 and the refractory layer 5 (the heat insulating material 3) are deteriorated due to carbonization and the like, and cracks 43 due to shrinkage are generated in the foam single layer 9, but the thermal expansion layer is provided between the metal plates 1 and 2. Since the heat-expandable layer 10 is provided, the heat-expandable layer 10 expands due to the heating by the flame 42 and fills the cracks 43 of the foam single-layer 9 for this reason. 43 will be blocked and flame 4
The heat of No. 2 does not pass through the crack 43, and the heat of the flame 42 is hard to reach the indoor side. As a result, even if exposed to a large amount of flame 42 for a long time, the heat insulating panel A
The fire protection performance of is less likely to deteriorate. Further, in the heat insulating panel A, the fireproof performance can be improved as compared with the heat insulating material 3 only of the foamed resin by the fire resistant layer 5 containing the inorganic foamed particles 4 which is less likely to be deteriorated by heat than the foam single layer 9 of the foamed resin. At the same time, by causing the foamed inorganic particles 4 to act as the core of the foamed resin to bring the foamed resin into close contact with the periphery of the foamed inorganic particles 4, even when exposed to a large amount of flame for a long time, cracks due to deterioration of the heat insulating material 3 occur. It is possible to prevent it from occurring, and it is more difficult for the fire prevention performance to decrease.

The inorganic foamed particles 4 are granular foams formed by crushing natural stones such as obsidian or ceramics such as alumina and then foaming them by firing, and are made of a glassy material in which aggregates of closed cells are strong. It is a lightweight foam covered with a film. As the inorganic foamed particles 4, those having a particle size of 0.5 to 5 mm, preferably 1 to 3 mm can be used. If the particle size of the inorganic foamed particles 4 is smaller than 0.5 mm, the inorganic foamed particles 4 may be difficult to handle and the productivity of the heat insulating panel A may be decreased. On the other hand, the particle size of the inorganic foamed particles 4 is less than 5 mm. If it is too large, the adhesion of the refractory layer 5 to the metal plate 1 may decrease, and the compressive strength of the heat insulating material 3 may decrease. Further, the specific gravity of the inorganic foam particles 4 is preferably about 0.1, whereby the lightweight property of the heat insulating panel A can be prevented from being impaired.

In the heat insulation panel A shown in FIG. 6, first, as shown in FIG. 7, the back surface metal plate 1, the heat-expandable layer 10 and the fireproof layer 5 are formed.
Can be formed by forming a panel half body A'in which the layers are laminated and then laminating the foam single layer 9 and the surface metal plate 2 on the panel half body A '. The panel half A'is provided with a spraying device 2 for spraying the inorganic foam particles 4.
6, a gantry 50 formed in the same manner as above, and a double conveyor 51 formed in the same manner as described above, and is formed by a panel half body manufacturing apparatus 46.

As shown in FIG.
2 and a distributor 33. Case 32
Is formed long in the lateral direction of the back surface metal plate 1 and the heat-expandable layer 10 (direction orthogonal to the traveling direction of the front surface metal plate 2 and the back surface metal plate 1 in the horizontal plane), and the back surface metal is formed on the lower surface of the case 32. A sprinkling port 34 is provided having a length that is approximately the same as the lateral dimension of the plate 1 and the heat-expandable layer 10. The distributor 33 has a rotating shaft 35 formed long in a direction parallel to the lateral direction of the metal plate 1 and the heat-expandable layer 10,
A plurality of blade portions 36 protruding from the peripheral surface of the rotating shaft 35.
It is formed from and. The vane portion 36 is made of hard rubber or the like, and is formed to have substantially the same length as the sprinkle port 34. Further, the plurality of blade portions 36 are provided at equal intervals so as to project on the peripheral surface of the rotating shaft 35. The distributor 33 is housed in the case 32 directly above the spray port 34, and the distributor 33 is formed so as to be rotatable about a rotation shaft 35.

As shown in FIGS. 10 and 11, the spraying device 26 is fixedly installed on the installation base 37, and the spreading device 26 is installed at the position where the long back metal plate 1 and the thermally expandable layer 10 are arranged. It is on the downstream side of the spray nozzle 52 in the traveling direction. That is, the lower metal plate 1 is provided with the spray nozzle 52.
After passing the lower side of the spraying device 26, the spraying device 26 passes through the lower side of the spraying device 26. Further, a supply pipe 38 for supplying the inorganic foam particles 4 into the case 32 is connected to the spraying device 26.

The gantry 50 reciprocates in the width direction (widthwise direction) of the heat-expandable layer 10 and the back metal plate 1 and is arranged between the heat-expandable layer 10 and the back metal plate 1 which are vertically opposed to each other. A spray nozzle 52 for uniformly spraying and injecting the same raw material liquid 6 as in the above is provided. The double conveyor 51 is for setting the gap between the heat-expandable layer 10 and the back metal plate 1, which are vertically opposed to each other, to a predetermined dimension.

The panel half body manufacturing apparatus 46 is shown in FIG.
Of the heat insulating panel A shown in FIG. 6 is manufactured immediately before the preheater 15 (near the boundary between the metal plate forming portion 40 and the filling portion 41). It is a thing.

Then, the heat insulating panel A shown in FIG. 6 is formed as follows. First, as described above, the elongated backside metal plate 1 is formed from the strip-shaped metal plate 25 in the metal plate forming unit 40, and the elongated backside metal plate 1 and the heat-expandable layer from the sheet feeding device 45 are formed. 10 and 10 are vertically opposed to each other (the back metal plate 1 is on the lower side and the heat-expandable layer 10 is on the upper side) so that the back-metal plate 1 and the heat-expandable layer 10 are conveyed to each other to transport the back metal plate 1 and the heat-expandable layer 10. 46.

Next, as shown in FIG. 12, the back surface metal plate 1 and the thermally expandable layer 10 introduced into the panel half body manufacturing apparatus 46.
To the gantry 50 of the panel half body manufacturing apparatus 46, where the cream-shaped raw material liquid 6 is sprayed from the spray nozzle 52 located between the back metal plate 1 and the thermally expandable layer 10.
Is injected toward the upper surface of the lower back metal plate 1 to supply the raw material liquid 6 between the long back metal plate 1 and the thermally expandable layer 10. After that, the back surface metal plate 1 and the heat-expandable layer 10 are advanced to the position of the spraying device 26, where a large number of inorganic foams are discharged from the spraying device 26 located between the back surface metal plate 1 and the heat-expandable layer 10. By spraying the particles 4 onto the raw material liquid 6 applied to the back metal plate 1,
The inorganic foam particles 4 are supplied between the long back metal plate 1 and the heat-expandable layer 10.

The dispersion of the inorganic foam particles 4 from the dispersion device 26 is performed as follows. In the case 32, a large number of inorganic foam particles 4 supplied through the supply pipe 38.
And the inorganic foamed particles 4 partially enter the space between the adjacent blade portions 36. Then, by rotating the distributor 33 in this state, the inorganic foam particles 4 that have entered the space between the adjacent blade portions 36 are conveyed to the spray port 34, and thereafter, the back surface metal is passed through the spray port 34. The raw material liquid 6 applied to the plate 1 is dropped and sprayed. At this time, the plurality of blades 36
Are projected at equal intervals on the peripheral surface of the rotary shaft 35, the inorganic foam particles 4 entering the space between the adjacent blade portions 36 are substantially constant, and therefore the rotation speed of the distributor 33 is reduced. By making it constant, the inorganic foamed particles 4 are substantially even in the traveling direction of the back metal plate 1 and the heat-expandable layer 10.
Can be sprayed. In this embodiment, the inorganic foamed particles 4 are dispersed on the raw material liquid 6 applied to the back metal plate 1 to disperse the inorganic foamed particles 4 in the raw material liquid 6, but not limited to this. After the inorganic foamed particles 4 are mixed and dispersed in the raw material liquid 6 in advance, the raw material liquid 6 in which the inorganic foamed particles 4 are dispersed may be supplied to the back surface metal plate 1 for coating.

The dispersed amount of the inorganic foamed particles 4 depends on the back metal plate 1.
5 to the raw material liquid 6 injected between the heat-expandable layer 10 and
It is preferably 40% by volume. If the amount of the dispersed inorganic foamed particles 4 is less than 5% by volume with respect to the raw material liquid 6 injected between the back surface metal plate 1 and the heat-expandable layer 10, the dispersed inorganic foamed particles 4 serve as nuclei of the foamed resin. Is too small to increase the density of the fireproof layer 5, and the fireproof layer 5 may not be able to improve the fireproof performance of the heat insulating material 3. Further, the amount of the inorganic foam particles 4 dispersed is 4 with respect to the raw material liquid 6 injected between the back surface metal plate 1 and the thermal expansion layer 10.
If it exceeds 0% by volume, the amount of the foamed resin in the refractory layer 5 becomes too small, and the adhesive strength (adhesion strength) of the refractory layer 5 to the back surface metal plate 1 and the heat-expandable layer 10 is reduced, or the heat insulating material 3 is compressed. There is a possibility that the strength of the panel may decrease and the performance of the panel may be impaired. The dispersion amount of the inorganic foamed particles 4 is the raw material liquid 6 in consideration of prevention of reduction in strength of the heat insulation panel.
To 10 to 30% by volume is preferable.

After the raw material liquid 6 and the inorganic foamed particles 4 are supplied as described above, the back surface metal plate 1 and the heat-expandable layer 10 are attached to the panel half body with the raw material liquid 6 interposed as shown in FIG. It is continuously introduced between the upper and lower conveyors 51a and 51b of the double conveyor 51 of the manufacturing apparatus 46. As a result, the raw material liquid 6 reacts (in the case of polyisocyanurate foam, the isocyanate and the polyol in the raw material liquid 6 react in the presence of the trimerization catalyst), and the foaming agent causes foaming and curing, which results in fire resistance. A layer 5 is formed between the back metal plate 1 and the thermally expandable layer 10. In this way, a long panel half A ′ in which the refractory layer 5 is filled between the back metal plate 1 and the heat-expandable layer 10 is continuously formed.

In FIGS. 8 and 13, a heat-expandable sheet is used as the heat-expandable layer 10 in forming the panel half A '. When it is formed of a fire-resistant paint, the heat-expandable layer 5 is formed similarly to the above, and then the heat-expandable paint is applied to the surface of the fire-resistant layer 5 to form the heat-expandable layer 10.

After the panel half A'is formed as described above, the panel half A'is introduced into the filling section 41 from the panel half manufacturing apparatus 46. At this time, the panel half A'is conveyed while the heat-expandable layer 10 of the panel half A'progresses upward. On the other hand, in the metal plate forming part 40, the elongated surface metal plate 2 is formed from the strip-shaped metal plate 25 in the same manner as described above. The elongated surface metal plate 2 is also formed in the metal plate forming part 40.
To the filling section 41. Next, the surface metal plate 2 and the panel half A ′ introduced into the filling section 41 are passed through the preheater 15 to be heated. Next, the heated front surface metal plate 2 and the panel half A ′ are advanced to the gantry 16, where the heat expansion layer 10 of the front surface metal plate 2 and the panel half A ′ is formed.
By spraying the creamy raw material liquid 6 toward the upper surface of the heat-expandable layer 10 of the lower panel half A ′ from the spray nozzle 31 located between the long surface metal plate 2 and
And the raw material liquid 6 is injected and supplied between the panel halves A ′. Thereafter, the surface metal plate 2 and the panel half A ′ are continuously introduced between the upper and lower conveyors 17a and 17b with the raw material liquid 6 interposed between the surface metal plate 2 and the panel half A ′. At the same time, the heating device 28 heats the raw material liquid 6 between the surface metal plate 2 and the panel half A ′ to 40 to 50 ° C. As a result, the raw material liquid 6 reacts (in the case of polyisocyanurate foam, the isocyanate and the polyol in the raw material liquid 6 react in the presence of the trimerization catalyst), and the foaming agent foams and cures the foam. The simple substance layer 9 is formed between the surface metal plate 2 and the thermal expansion layer 10. By laminating the foam single layer 9 and the surface metal plate 2 on the heat-expandable layer 10 of the panel half A'in this manner, the foam single layer 9 is formed between the surface metal plate 2 and the panel half A '. The long panel original plate 27 filled with is continuously molded.

The filling section 41 is provided with a side seal conveyor (not shown) which operates in synchronization with the double conveyor 17, and the front side metal plate 2 and the back side metal plate introduced into the double conveyor 17 by this side seal conveyor. 1 is positionally adjusted in the width direction. Further, by the side seal conveyor, the strip-shaped seal packing 39 is supplied to the concave portions 8 of the front surface metal plate 2 and the rear surface metal plate 1, and the moisture-proof paper strip (not shown) is continuously supplied to the convex portions 7. The seal packing 39 and the moisture-proof paper strip prevent the raw material liquid 6 being foamed and cured from flowing out between the front metal plate 2 and the rear metal plate 1.

After that, the heat insulating panel original plate 27 is attached to the finishing section 4
Introduce to 4. Here, the dimension of the heat insulating panel original plate 27 is measured by the width / thickness gauge 19, and then the heat insulating panel original plate 27 is cut into a predetermined size by the cross cutting machine 20 controlled by the process computer. A heat insulating panel A as shown in can be formed. afterwards,
The heat insulation panel A is laminated by controlling the length and the unit of the number of packages by an automatic loading device such as the reject pillar 22 and the pillar 24. The line speed of the above-mentioned manufacturing apparatus (the speed at which the metal plates 1 and 2, the heat-expandable layer 10 and the panel half A ′ are sent) is preferably 5.0 to 15.0 m / min.

FIG. 14 shows the result of the fireproof performance test obtained by heating the heat insulating panel based on the standard heating temperature curve based on ISO834. In FIG. 14, a curve a represents a temperature change curve of the back surface (back surface metal plate 1 side) of the heat insulating panel in which the heat insulating material 3 made of polyisocyanurate foam is formed between the front surface metal plate 2 and the back surface metal plate 1, Curve b is a heat insulating material 3 made of a mixture of polyisocyanurate foam and inorganic foam particles 4 between the front metal plate 2 and the back metal plate 1.
Shows the temperature change curve of the back surface of the heat insulating panel, the curve c shows the temperature change curve of the back surface of the heat insulating panel A of the present invention shown in FIG. 1, and the curve d of the heat insulating panel A of the present invention shown in FIG. The temperature change curve of the back surface is shown. The thickness of the heat insulating panel, the type and thickness of the metal plates 1 and 2, and the type of foamed resin of the heat insulating material 3 (the foam single layer 9 and the fireproof layer 5) were the same for all the heat insulating panels.

As is apparent from FIG. 14, the thermally expandable layer 1
Compared to the curves a and b of the heat insulation panel that does not contain 0,
It can be seen that the curves c and d of the heat insulating panel A of the present invention containing the thermally expansive layer 10 have a low temperature rise. That is,
The heat insulation panel A shown in FIGS. 1 and 6 can improve the fire protection performance. Further, it can be seen that the temperature rise of the curve d of the heat insulating panel A having the fireproof layer 5 built therein is lower than that of the curve c of the heat insulating panel A having no fireproof layer 5 built therein. That is, in the heat insulating panel A shown in FIG. 6, the fireproof performance can be further improved by the fireproof layer 5.

[0049]

As described above, according to the first aspect of the present invention, in the heat insulating panel formed by filling the heat insulating material made of foamed resin between the front metal plate and the back metal plate, the thermal expansion is caused by heat. The heat-expandable layer is expanded by heat during a fire to prevent cracks due to shrinkage of the heat insulating material caused during a fire, etc. The expanded heat-expandable layer can be filled in, and even if exposed to a large amount of flame for a long period of time, the fire protection performance is less likely to deteriorate.

Further, the invention of claim 2 of the present invention is characterized in that a fireproof layer in which a foamed resin and inorganic foamed particles are mixed is formed on a heat insulating material, and The fire-resistant layer containing inorganic foam particles, which is not easily deteriorated by heat, can improve the fire protection performance compared to a heat insulating material that uses only foam resin, and the inorganic foam particles act as the core of the foam resin to surround the inorganic foam particles. By closely adhering the foamed resin to the resin, it is possible to prevent the heat insulating material from cracking due to deterioration even when exposed to a large amount of flame for a long time, and further it is difficult for the fire prevention performance to decrease.

Further, the invention of claim 3 of the present invention is characterized in that the heat-expandable layer and the heat insulating material are brought into close contact with each other, and cracks due to shrinkage of the heat insulating material caused in a fire or the like are generated. The expanded heat-expandable layer is easily filled, and the fire protection performance is less likely to deteriorate.

Further, the invention of claim 4 of the present invention is characterized in that the foamed resin is polyisocyanurate foam, and has a higher fire protection performance than other foamed resins such as polyurethane foam and polystyrene foam. The heat insulating material can be formed, and the fireproof performance is less likely to deteriorate.

According to a fifth aspect of the present invention, a heat insulating material made of foamed resin is formed by injecting a raw material liquid of a foaming resin between the metal plates of the front metal plate and the back metal plate and foaming the injected raw material liquid. In the method of manufacturing a heat insulating panel, a heat expandable layer that expands due to heat is provided along the back metal plate. It is possible to expand the thermally expandable layer with heat such as the above and to fill the expanded thermally expandable layer in the crack due to the contraction of the heat insulating material generated at the time of fire, etc., and to be exposed to a large amount of flame for a long time. Also makes it difficult to reduce the fire protection performance.

Further, the invention of claim 6 of the present invention comprises foaming the raw material liquid in which the inorganic expanded particles are dispersed,
It is characterized by forming a fire-resistant layer in which foamed resin and inorganic foam particles are mixed in a heat insulating material.By manufacturing a heat-insulating panel with a built-in fire-resistant layer, it is deteriorated by heat more than the heat insulating material of foamed resin. A fire resistant layer containing inorganic foamed particles, which is difficult to prevent, can improve fire protection performance as compared to a heat insulating material made of foamed resin alone, and at the same time act the inorganic foamed particles as the core of the foamed resin to form the foamed resin around the inorganic foamed particles. The close contact makes it possible to prevent the heat insulating material from cracking due to deterioration even when exposed to a large amount of flame for a long time, and further, the fire prevention performance is less likely to deteriorate.

Further, the invention of claim 7 of the present invention is characterized in that 5 to 40% by volume of the inorganic expanded particles are dispersed in the raw material liquid, and the adhesiveness to the heat-expandable layer is improved. It is possible to form a fireproof layer having high fireproof performance, and to form a heat insulating panel having high strength and fireproof performance.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing an example of an embodiment of the present invention.

FIG. 2 is a partial cross-sectional view of the above.

FIG. 3 is a partial cross-sectional view showing a fire situation in the above.

FIG. 4 is a schematic view showing an example of the above manufacturing apparatus.

FIG. 5 is a perspective view showing a part of the above manufacturing apparatus.

FIG. 6 is a perspective view showing an example of another embodiment of the above and a part of which is broken away.

FIG. 7 is a partial perspective view of the above.

FIG. 8 is a schematic view showing another example of the above manufacturing apparatus.

FIG. 9 is a cross-sectional view showing a part of the above manufacturing apparatus.

FIG. 10 is a side view showing a part of the above manufacturing apparatus.

FIG. 11 is a rear view showing a part of the above manufacturing apparatus.

FIG. 12 is a side view showing a part of the above manufacturing apparatus.

FIG. 13 is a perspective view showing a part of the above manufacturing apparatus.

FIG. 14 is a graph showing the results of the fire protection performance test of the above.

[Explanation of symbols]

1 Back metal plate 2 Surface metal plate 3 insulation 4 Inorganic foam particles 5 Fireproof layer 6 raw material liquid 10 Thermally expandable layer A heat insulation panel

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) B32B 15/08 B32B 15/08 E 4F204 E04C 2/26 E04C 2/26 V E04D 3/35 E04D 3/35 G E04F 13/12 E04F 13/12 A // B29K 79:00 B29K 79:00 105: 04 105: 04 B29L 31:10 B29L 31:10 (72) Inventor Koichi Shibata 3-chome, Hakaseminamishinmachi, Amagasaki City, Hyogo Prefecture No. 1 Daido Steel Sheet Co., Ltd. F term (reference) 2E001 DD01 DE04 FA09 FA16 GA42 GA44 GA82 HB01 HB03 HB04 HB07 HB08 HD01 HD03 HD04 HD09 HE01 HF11 2E108 CC01 CV03 GG01 GG10 2E110 AA02 AB02 AB04 BA04 BA05 BA12 ZZGA24 ZA03 GA03 EA03 GA09 GA24 GB01X GB43Z GB54Z GB55Z 2E162 CB02 CB03 CB05 CB07 CB08 CB09 CB11 CD01 CD02 CD03 GA04 GB01 4F100 AA00C AB01A AB01B AC00 AD00 AK01C AK01D AK31C BA04 BA07 BA10A BA10B BA13 CA01 CC00D DE01C DJ01C EH132 EH312 GB07 GB08 JA02D JJ02 JJ07 JL11 YY00C 4F204 AA36 AB02 AB16 AB26 AD03 AD08 AD34 AE02 AH47 AH48 EA01 EA04 EB02 EB13 EF05 EF27

Claims (7)

[Claims] 1. A heat insulating panel formed by filling a heat insulating material made of foamed resin between a front metal plate and a back metal plate, wherein a thermally expandable layer that expands by heat is provided along the back metal plate. Characteristic heat insulation panel. 2. The heat insulating panel according to claim 1, wherein a fire resistant layer in which a foamed resin and inorganic foamed particles are mixed is formed on a heat insulating material. 3. The heat insulation panel according to claim 1, wherein the heat expansion layer and the heat insulation material are in close contact with each other. 4. The heat insulation panel according to claim 1, wherein the foamed resin is polyisocyanurate foam. 5. A method of manufacturing a heat insulating panel, comprising: injecting a raw material liquid of a foamed resin between a front metal plate and a back metal plate and forming a heat insulating material made of the foamed resin by foaming the injected raw material liquid; A heat-expandable layer is provided along the back metal plate. 6. The heat insulating panel according to claim 5, wherein a fireproof layer in which the foamed resin and the inorganic foamed particles are mixed is formed on the heat insulating material by foaming a raw material liquid in which the inorganic foamed particles are dispersed. Manufacturing method. 7. The method for producing a heat insulating panel according to claim 5, wherein 5 to 40% by volume of the inorganic expanded particles are dispersed in the raw material liquid.