JPH0237294B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing an architectural heat insulating board (hereinafter simply referred to as a heat insulating board) having a structure in which a plastic foam is sandwiched between a metal plate material and a sheet material, which are useful as exterior materials for buildings and structures. In particular, this type of insulation board can be used as a member for fireproof structures, can be produced continuously at low cost without leakage during foaming of plastic foam, and has high heat insulation properties. .

Conventional insulation boards of this type are produced using a manufacturing method in which refractories are uniformly dispersed throughout the foam structure of the core insulation material, a sheet-like material is layered on top of the foam, and then formed and cured in a cure oven, etc. was. However, when a heat insulating board is manufactured by this type of manufacturing method, there are disadvantages in the following points.
That is, it is difficult to uniformly mix and discharge the foamed synthetic resin raw material and the refractory material, and the foamed structure becomes rough.
Since the foamed structure is damaged, the foaming ratio and mechanical strength are reduced. , which increases the amount of foamed synthetic resin used, leading to an increase in costs. Foamed synthetic resin leaks from the side edge of the sheet material during foam molding, staining the back surface of the insulation board and the mold material. In other words, when forming a flat sheet into a foam, the foaming pressure of the foam is used to mold the sheet into a shape, so even a slight deviation will cause the above-mentioned results. especially,
In the case of a cross-sectional shape having a bulge protruding from the recess of the metal hoop material, the desired cross-sectional shape is very often not achieved because the side ends of the female part are formed and released at the same time. This is because the synthetic resin raw material in the process of foaming comes into direct contact with the mold material. That is, this is because a gap occurs between the current temperature of the mold material being heated and the temperature of the raw material that is being foamed.

In order to eliminate such drawbacks, the present invention locally laminates foamed synthetic resin containing fire-resistant aggregate only at the female joint, which is the weakest point in the fireproof structure, and foamed synthetic resin is applied to other parts. In addition to dispensing and laminating resin alone, the formed sheet material is laminated and coated on the foamed synthetic resin, and the thin metal sheet material is fixed by the self-adhesive properties of the foamed synthetic resin, thereby producing the desired product at low cost. The present invention proposes a method for producing a heat insulating board that exhibits fire resistance, has a high expansion ratio, and does not stain the back surface of the heat insulating board or reduce mechanical strength.

EMBODIMENT OF THE INVENTION Below, one Example of the manufacturing method of the heat insulation board based on this invention is demonstrated in detail using drawing. FIGS. 1a and 1b are a side view and a plan view schematically showing the apparatus used in the above manufacturing method, in which 1 is a band-shaped metal hoop material (hereinafter simply referred to as hoop material), which is continuously fed out from an uncoiler 2; It is fed to a molding machine 3, and bent by the molding machine 3 into the shape shown in FIG. 2a.
That is, in FIG. 2a, the left and right ends in the longitudinal direction of the hoop material are bent, respectively, to provide bent portions 4 and 5 of a male connection structure and a female connection structure, and a recess 6 is formed between the bent portions 4 and 5. It was formed. The hoop material 1 thus formed is heated to approximately 40 to 90°C by a preheater 7. Specific examples of the preheater 7 include electricity, far infrared rays, gas, high frequency, etc. as a heat source. 8 is a mixer and fire-resistant aggregate 9
Hoop material 1 is mixed with foamed synthetic resin 10.
The liquid is discharged onto the back surface 5a of the bent portion 5 as shown in FIG. 2b. Note that the discharge range S is the back surface 5.
It is preferable that it is not the entire back surface of a, but a region that is offset about 2 to 5 mm inward from the tip. This not only facilitates the work of pasting sheet-like objects as described later, but also
A part of the foamed synthetic resin raw material 10 is bent at the bent part 5
A safety margin is provided to prevent the tip from passing through the tip 5b and reaching the surface 5c. Of course, when the foamed synthetic resin is foamed, the aggregate 9 suppresses its fluidity and helps prevent the raw material 10 from leaking. Specific examples of the fire-resistant aggregate 9 include pearlite grains, vermiculite, shirasu balloons, alumina bulbs, glass balloons, etc., and the size thereof is about 1 to 10 mmφ. Furthermore, the foamed synthetic resin raw material 10 is made of polyisocyanurate foam raw material, polyurethane resin (soft, hard, semi-hard), phenolic resin, polyimide resin, etc., and mainly functions as a binder for the aggregate 9 and a heat insulating layer. It is. Reference numeral 11 denotes a foamed synthetic resin raw material supply device, which is composed of, for example, a nozzle, and is used to supply the foamed synthetic resin raw material 12 into the recess 6 as shown in FIG. 2c. Note that, although one of the foamed synthetic resins 10 is used as the raw material 12, it is not necessarily necessary to use the same type of raw material. A mold 13 is formed by upper and lower mold conveyors 14 and 15 as shown in FIG.
The distance H matches the thickness t of the heat insulating plate. The mold 13 rotates in the direction of the arrow, gradually dissolves at the exit, and forms again at the entrance. Reference numeral 16 denotes a cure oven, which is a device that surrounds the upper and lower mold conveyors 14 and 15, which are both mold members, and can heat the oven to about 50 to 100°C, and is mainly useful for heating the mold material and curing the foamed synthetic resin. be. Further, although not shown, a dehumidifying device can be added to the cure oven 16 and operated depending on the raw material. 17 is a sheet-like material, such as laminating one or more of kraft paper, asbestos paper, asphalt felt, and non-woven fabric, or waterproofing these sheet-like materials, or using metal foil (Al, Cu, Fe, Sn). This is mounted on an uncoiler 18, and then fed to a sheet-like material forming machine 20 via a guide roller 19. This sheet-like material 17 is formed into a rectangular shape as shown in FIG. Conveyor 14,1
A mixture 21 consisting of aggregate 9 and foamed synthetic resin 10 and the back surface of foamed synthetic resin 12 are coated as shown in FIG. Note that the sheet-like material 17 functions as a material (release paper) for preventing contact between the mold material and the foamed synthetic resin, and also has the function of preventing the foamed synthetic resins 10 and 12 from leaking out of a predetermined area. Reference numeral 22 is a cutter for cutting a heat insulating plate fed from the outlet of the cure oven 16 and having a cross section as shown in FIG. 4 into a predetermined size. As a result, the heat insulating board has a foam 23 portion made only of foamed synthetic resin and a foam containing aggregate, the so-called fireproof layer 24, which are integrally formed, and the metal hoop material 1 and sheet-like material 17 are made of foamed synthetic resin raw material. When foaming, it sticks together with its self-adhesive properties.

What has been described above is only one example of the method for manufacturing a heat insulating board according to the present invention, and as shown in FIG. It is also possible to use aggregate filled with a foamed fire retardant 25 that releases water and forms an inorganic foam layer. Furthermore, as shown in FIG. 6, it is also possible to form a double width and provide a finishing machine for tongue finishing in the final process, that is, in the process following the running cutter. In addition, the side wall 1 of the sheet-like material 17
It is also possible to feed the mold 13 while inserting the mold 7a with a shoe. Further, in FIG. 1a, a set of embossing rolls can be incorporated in the middle of the molding machine 3, or an embossing roll 26 can be arranged between the outlet of the molding machine 3 and the preheater 7.

As described above, the method for manufacturing a heat insulating board according to the present invention has the major feature that a fireproof layer and a highly heat insulating heat insulating layer can be formed on the hoop material in the same line extremely easily, at low cost, and efficiently. There is. Also,
The molded hoop material 1 and the sheet-like material 17 form a mold, and since the foamed synthetic resin is foamed in this mold, there is no leakage of the resin to the outside. Furthermore, the joints, which are weak points in the fireproof structure of the heat insulating board, are reinforced by the fireproof layer. Furthermore, since the concave portion of the hoop material is filled with a single foamed synthetic resin, the foamed structure does not become rough, and the mechanical strength can be significantly improved.

[Brief explanation of drawings]

FIGS. 1a and 1b are side views and plan views schematically showing an apparatus for carrying out the method for manufacturing a thermal insulation board for buildings according to the present invention, and FIGS. 2a to 2d are sectional views at each step in FIG. 1, FIG. 3 is a cross-sectional view taken along the line shown in FIG. 1, FIG. 4 is a perspective view showing an architectural heat insulating board manufactured by the manufacturing method according to the present invention, and FIGS. 5 and 6 are other examples. FIG. 1... Metal hoop material, 3... Molding machine, 10, 12...
Foamed synthetic resin, 13... mold, 23... heat insulation layer, 24...
Fireproof layer.

Claims (1)

[Claims] 1 A bent part of a male connecting structure and a female connecting structure are provided at both ends of a continuously supplied band-shaped metal hoop material, and a bone is attached to the back side of the part of the bent part that becomes the female connecting structure. The foamed synthetic resin raw materials containing the resin are laminated, and then the foamed synthetic resin raw materials are injected into the recess between both bent parts, and when the raw materials are in the middle of foaming, the foamed synthetic resin raw materials are laminated, and when the raw materials are in the middle of foaming, the foamed synthetic resin raw materials are laminated. At least the back side up to the beginning of the bending part of the male connection structure.
1. A method for producing a heat insulating board for construction, which comprises covering the board with a sheet-like material formed into a shape, and fixing the board together by the self-adhesive properties of a foamed synthetic resin during foaming.