Fire-resistant and heat-insulating panel and method for manufacturing the same

Abstract

To improve the aesthetic appeal of fire-resistant and heat-insulating panels. [Solution] In the present invention, a fire-resistant heat-insulating panel (1) is provided with heat-insulating materials (3,4) on both sides of a fire-resistant core material (2), and the core material (2) and the front and back heat-insulating materials (3,4) are fastened together from the outside with fasteners (5), and metal plates (6,7) are provided on the outside of the front and back heat-insulating materials (3,4), respectively. In this invention, the core material (2) and the heat-insulating materials (3,4) are fastened together with fasteners (5), a shrinkable reinforcing material (9) is provided between the head (8) of the fasteners (5) and the metal plates (6,7), and then the metal plates (6,7) are provided on the outside of the front and back heat-insulating materials (3,4), respectively, thereby providing a shrinkable reinforcing material (9) between the head (8) of the fasteners (5) and the metal plates (6,7). Furthermore, a gap is formed between the reinforcing material (9) and the head (8) of the fasteners (5).

Description

Technical Field

[0001] The present invention relates to a fireproof heat insulation panel in which heat insulation materials having heat insulation properties are provided on the front and back of a core material having fire resistance, the core material and the heat insulation materials on the front and back are fastened with fasteners from the outside, and metal plates are provided on the outside of the heat insulation materials on the front and back, and a method for manufacturing the same.

Background Art

[0002] In buildings where strict temperature control is required inside, such as refrigerated warehouses, fireproof heat insulation panels are widely used for floors, side walls, partitions, ceilings, etc.

[0003] As this fireproof heat insulation panel, a rectangular plate-shaped heat insulation material having heat insulation properties is provided on the front and back of a rectangular plate-shaped core material having fire resistance, the core material and the heat insulation materials on the front and back are fastened with fasteners such as a plurality of screws from the outside, and further, metal plates in the shape of rectangular thin plates are provided on the outside of the heat insulation materials on the front and back, respectively (for example, see Patent Document 1).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the above conventional fireproof heat insulation panel, the head of the fastener for fastening the core material and the heat insulation material during manufacturing or the like abuts on the metal plate outside thereof, and circular traces are formed on the surface (outer surface) of the metal plate that can be visually observed on the appearance, which may impair the design property of the appearance.

[0006] When bonding metal plates to insulation material, the insulation material thins due to the pressure applied to the surface of the insulation material during pressing. However, the height of the fastener heads attached to the core material remains unchanged, causing the fastener heads to come into contact with the metal plate. As a countermeasure, sinking the fastener heads beyond the amount by which the insulation material shrinks prevented the metal plate from deforming into a concave shape. However, after the adhesive curing was complete and the press was released, the metal plate and the fastener heads were bonded. While the thickness of the insulation material returned to its original state, the height of the fastener heads remained unchanged, resulting in a concave area on the metal plate where it was bonded to the fastener heads. This phenomenon could be prevented by perfectly designing the press pressure, the elastic modulus of the insulation material, and the amount of sinking of the fastener heads, but this was difficult to implement due to the complexity of designing under various conditions. Another method tried was applying a release agent to the fastener heads. While this was fine in terms of workability and cost, it was difficult to confirm whether the release agent had been applied, leading to frequent omissions and accidental application to areas where the release agent should not be applied. Thus, the need arose for a simpler, more reliable, and less costly solution, which led to this invention. [Means for solving the problem]

[0007] Therefore, in the present invention according to claim 1, a fire-resistant and heat-insulating panel is provided in which a heat-insulating material is provided on both sides of a fire-resistant core material, the core material and the heat-insulating materials on both sides are fastened together from the outside with fasteners, and metal plates are provided on the outside of the heat-insulating materials on both sides, and a shrinkable reinforcing material is provided between the head of the fastener and the metal plate.

[0008] Furthermore, in the present invention according to claim 2, a gap is formed between the auxiliary material and the head of the fastener, as in the present invention according to claim 1.

[0009] Furthermore, in the present invention according to claim 3, a method for manufacturing a fire-resistant heat-insulating panel is provided in which a heat-insulating material is provided on both sides of a fire-resistant core material, the core material and the heat-insulating materials on both sides are fastened together from the outside with fasteners, and metal plates are provided on the outside of the heat-insulating materials on both sides. In this method, the core material and the heat-insulating material are fastened together with fasteners, a reinforcing material with shrinkability is provided between the head of the fastener and the metal plate, and then metal plates are provided on the outside of the heat-insulating materials on both sides. [Effects of the Invention]

[0010] Furthermore, the present invention provides the following effects.

[0011] In other words, in the present invention, a fire-resistant and heat-insulating panel is provided in which heat-insulating material is provided on both sides of a fire-resistant core material, the core material and the heat-insulating material are fastened together from the outside with fasteners, and metal plates are provided on the outside of the heat-insulating material. By providing a reinforcing material that has shrinkage properties between the head of the fastener and the metal plate, contact between the fastener and the metal plate is prevented by the shrinkage of the reinforcing material, and stress is distributed, which prevents the formation of circular marks on the visible surface (outer surface) of the metal plate, resulting in a fire-resistant and heat-insulating panel with excellent aesthetic design.

[0012] In particular, if a gap is formed between the reinforcing material and the head of the fastener, it becomes even more possible to prevent the formation of circular marks on the visible surface (outer surface) of the metal plate, resulting in a fire-resistant and heat-insulating panel with excellent aesthetic design.

[0013] Furthermore, in the present invention, in a method for manufacturing a fire-resistant and heat-insulating panel in which a heat-insulating material is provided on both sides of a fire-resistant core material, the core material and the heat-insulating materials on both sides are fastened together from the outside with fasteners, and metal plates are provided on the outside of the heat-insulating materials on both sides, the core material and the heat-insulating material are fastened together with fasteners, a shrinkable reinforcing material is provided between the head of the fastener and the metal plate, and then metal plates are provided on the outside of the heat-insulating materials on both sides. As a result, when the metal plates are provided on the outside of the heat-insulating materials on both sides, it is possible to prevent the fastener and the metal plate from coming into contact or bonding due to the shrinkage of the reinforcing material, and stress is distributed, preventing the formation of circular marks on the surface (outer surface) of the metal plate that can be seen visually, and thus it is possible to manufacture a fire-resistant and heat-insulating panel with excellent aesthetic design. [Brief explanation of the drawing]

[0014] [Figure 1] A perspective view (a) and a partially enlarged perspective view (b) showing the fire-resistant and heat-insulating panel according to the present invention. [Figure 2] Enlarged cross-sectional view of the same section. [Figure 3] A partially enlarged cross-sectional view showing the same manufacturing process. [Modes for carrying out the invention]

[0015] The specific configuration of the fire-resistant heat-insulating panel and its manufacturing method according to the present invention will be described below with reference to the drawings.

[0016] As shown in Figures 1 to 3, the fire-resistant and heat-insulating panel 1 is a rectangular plate-shaped building material used for floors, side walls, partitions, and ceilings in buildings where strict temperature control is required, such as refrigerated warehouses.

[0017] This fire-resistant and heat-insulating panel 1 is a metal sandwich panel in which rectangular heat-insulating materials 3 and 4 are provided on the front and back of a rectangular core material 2 that has fire resistance, and the core material 2 and the front and back heat-insulating materials 3 and 4 are fastened from the outside with multiple fasteners 5 such as screws, and rectangular thin metal plates 6 and 7 are bonded to the outside of the front and back heat-insulating materials 3 and 4, respectively. In the figure, 11 to 14 indicate the adhesive layer.

[0018] As the core material 2, a material formed of a fire-resistant material can be used. For example, a plate material formed of ALC (Autoclaved Light weight Concrete), which is excellent not only in fire resistance but also in heat insulation and light weight, can be used. The thickness of the ALC is 30 to 100 mm, and the bulk density in the air-dried state is 3.50 to 600 kg / m 3 is good, but it suffices if it has sufficient strength to fix the fire resistance and the heat insulating materials 3 and 4. A material with a thickness of 3.7 mm and a bulk density in the air-dried state of 3.50 kg / m 3 is most suitable.

[0019] As the heat insulating materials 3 and 4, materials formed of heat-insulating materials can be used. For example, a plate material formed by foaming a phenolic resin, which is excellent not only in heat insulation but also in fire resistance, workability, and light weight, can be used. In the case of Neoform of Asahi Kasei Building Materials Corporation with a bulk density of 25 to 50 kg / m 3 is suitable for applying the present invention in terms of strength and elastic modulus during pressing. Specifically, the compressive strength at 5% deformation is 10 to 30 N / mm 3 is used. The thickness of the heat insulating materials 3 and 4 is selected from the viewpoints of heat insulation required for the sandwich panel and bending strength of the panel. Generally, about 20 to 100 mm is used. When the thickness increases, the dimensional change during pressing becomes large, but there is no problem if the present invention is applied.

[0020] As the metal plates 6 and 7, for example, a painted aluminum-zinc alloy plated steel plate or the like can be used. The thickness of the metal plates 6 and 7 is preferably about 0.35 to 1.2 mm. If the metal plates 6 and 7 are thin, circular traces or dents are likely to occur. However, according to the present invention, even when metal plates 6 and 7 with a thickness of about 0.35 to 0.6 mm are used, the occurrence of circular traces or dents can be prevented.

[0021] In this fire-resistant heat-insulating panel 1, a shrinkable supplementary material 9 is interposed between the outer surface of the head 8 of the fastener 5 and the inner surfaces of the metal plates 6 and 7 during manufacturing.

[0022] The reinforcing material 9 can be any material that shrinks (or expands and contracts) along the fastener 5 between the metal plates 6 and 7 and the head 8 of the fastener 5. For example, sponge or rubber can be used. Note that, considering workability, the reinforcing material 9 should be fixed to a wider area than the head 8 of the fastener 5 using double-sided tape or the like. Care must be taken when doing so, as if the thickness is too great and the shrinkage is insufficient, the metal plates 6 and 7 outside the head 8 of the fastener 5 will bulge. Also, if only shrinkage is considered and a material with extremely low density and thinness is selected, the adhesive may seep to the back of the reinforcing material 9 during pressing, or the adhesive may soak into the reinforcing material 9, resulting in a hard, plate-like object after the adhesive hardens. Therefore, foamed plastic is suitable as the material, and among these, soft urethane with low compression set and easy thickness recovery upon release of the press is preferable. A thickness of 1-10 mm is preferable, with 2-5 mm being particularly preferable. The density should be 5-30 kg / m³. 3 Suitable, 15-25 kg / m 3 This is particularly preferable.

[0023] During the manufacture of the fire-resistant insulation panel 1, the insulation material 3, which has been coated with a predetermined adhesive, is placed on top of the core material 2, and then temporarily fixed with fasteners 5 until the adhesive hardens. After that, the panel is inverted, and the insulation material 4, which has been coated with a predetermined adhesive, is placed on top of the back surface of the core material 2, and then temporarily fixed with fasteners 5 until the adhesive hardens. Once several panels with the insulation material 3 and 4 temporarily fixed to the front and back surfaces of the core material 2 are completed, they are stacked, pressed, and cured. At this time, the head 8 of the fasteners 5 must be recessed (forming a recess 10) from the surface of the insulation material 3 and 4 with sufficient margin to accommodate the amount of shrinkage of the insulation material 3 and 4 that occurs when pressing the core material 2 and insulation material 3 and 4 together, and when pressing the metal plates 6 and 7 together.

[0024] Once curing is complete, as shown in Figure 3(a), a reinforcing material 9 is placed on the outer surface of the insulation materials 3 and 4 directly outside the head 8 of the fastener 5, and then, as shown in Figure 3(b), the process moves on to bonding the metal plates 6 and 7. In this process, bonding the metal plates 6 and 7 to the head 8 of the fastener 5 is a concern, but since the insulation materials 3 and 4 shrink when bonding the core material 2 to the insulation materials 3 and 4 and then pressing and curing them, it is preferable that the dimensions of the reinforcing material 9 return to their original state when the press is released. The press pressure is determined according to the adhesive application method and viscosity, but for example, when applying the adhesive in a multi-strand bead pattern, the bead diameter is 0.5 to 2 mm, the bead spacing is 10 to 20 mm, and the application amount is 100 to 450 g / m 3 In this case, 0.5~1.5 kg / cm³ 3 This is the extent of the problem. At this time, care must be taken to ensure that the pressing pressure does not cause cracks or residual stress in the insulation materials 3 and 4.

[0025] In this way, by providing a reinforcing material 9 with shrinkability on the head 8 of the fastener 5 (the recess 10 in the insulation material 3,4), as shown in Figure 3(c), when metal plates 6,7 are attached to the outer surface of the insulation material 3,4 during the manufacture of the fire-resistant insulation panel 1, the reinforcing material 9 shrinks and deforms due to the metal plates 6,7, filling the recess 10 in the insulation material 3,4 formed on the outside of the head 8 of the fastener 5.

[0026] As a result, during the manufacturing of the fire-resistant insulation panel 1, the shrinkage of the reinforcing material 9 prevents contact and adhesion between the head 8 of the fastener 5 and the inner surfaces of the metal plates 6 and 7, and also distributes stress.

[0027] Therefore, the fire-resistant insulation panel 1 can prevent circular marks from forming on the visible surface (outer surface) of the metal plates 6 and 7, resulting in a fire-resistant insulation panel 1 with excellent aesthetic design. Furthermore, if the space between the metal plates 6 and 7 and the fasteners 5 is blocked by a reinforcing material 9 with insulating properties, it is possible to prevent the fasteners 5, made of iron or stainless steel, from becoming a thermal bridge, even if there is a large temperature difference on both sides of the sandwich panel.

[0028] As described above, the fire-resistant and heat-insulating panel 1 has a structure in which a shrinkable reinforcing material 9 is provided between the head 8 of the fastener 5 and the metal plates 6 and 7.

[0029] Therefore, in the fire-resistant and heat-insulating panel 1 with the above configuration, the shrinkage of the reinforcing material 9 prevents contact and adhesion between the fastener 5 and the metal plates 6 and 7, and also distributes stress, preventing the formation of circular marks on the visible surface (outer surface) of the metal plates 6 and 7, resulting in a fire-resistant and heat-insulating panel 1 with excellent aesthetic design.

[0030] Furthermore, the fire-resistant insulation panel 1 has a structure in which a gap (recess 10) is formed between the reinforcing material 9 and the head 8 of the fastener 5.

[0031] Therefore, with the fire-resistant and heat-insulating panel 1 configured as described above, it is possible to further prevent the formation of circular marks on the visible surface (outer surface) of the metal plates 6 and 7, resulting in a fire-resistant and heat-insulating panel 1 with excellent aesthetic design.

[0032] Furthermore, in the manufacturing method of the fire-resistant heat-insulating panel 1 described above, the core material 2 and the heat-insulating materials 3 and 4 are fastened together with fasteners 5, a reinforcing material 9 with shrinkability is provided between the head 8 of the fasteners 5 and the metal plates 6 and 7, and then the metal plates 6 and 7 are provided on the outside of the front and back heat-insulating materials 3 and 4, respectively.

[0033] Therefore, in the fire-resistant and heat-insulating panel 1 with the above configuration, when metal plates 6 and 7 are provided on the outside of the front and back insulation materials 3 and 4, the shrinkage of the reinforcing material 9 prevents contact between the fastener 5 and the metal plates 6 and 7, and the stress is distributed, preventing the formation of circular marks on the visible surface (outer surface) of the metal plates 6 and 7, thereby enabling the manufacture of a fire-resistant and heat-insulating panel 1 with excellent aesthetic design. [Explanation of Symbols]

[0034] 1. Fire-resistant insulation panel 2. Core material 3,4 Insulation material 5 Fasteners 6,7 Metal plate 8 Head 9. Reinforcement material 10. Recess 11~14 Adhesive layer

Claims

1. In a fire-resistant and heat-insulating panel, a fire-resistant core material is provided with heat-insulating material on both sides, the core material and the outer and inner insulation materials are fastened together from the outside with fasteners, and metal plates are provided on the outside of the outer and inner insulation materials, A fire-resistant and heat-insulating panel characterized by having a shrinkable reinforcing material between the head of the fastener and the metal plate.

2. The fire-resistant and heat-insulating panel according to claim 1, characterized in that a gap is formed between the reinforcing material and the head of the fastener.

3. In a method for manufacturing a fire-resistant and heat-insulating panel, a fire-resistant core material is provided with heat-insulating materials on both sides, the core material and the heat-insulating materials on both sides are fastened together from the outside with fasteners, and metal plates are provided on the outside of the heat-insulating materials on both sides, A method for manufacturing a fire-resistant heat-insulating panel, characterized by fastening a core material and an insulating material with fasteners, providing a reinforcing material with shrinkage flexibility between the head of the fastener and a metal plate, and then providing metal plates on the outside of the insulating material on both sides.

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