JP2882042B2 - Manufacturing method of plate-shaped heat insulating material with ventilation groove - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method of manufacturing a plate-like heat insulating material having a ventilation groove formed on a surface thereof.

[Conventional technology]

The ventilation method adopted in the heat insulation method of a wooden house is one of the most widespread and effective methods for preventing internal dew condensation of a skeleton by heat insulation of a house.

On the other hand, in recent years, the hermeticity of houses has been attracting attention to minimize heat loss in houses. For this hermeticity, a method of installing heat insulating material on the outside of the frame called external heat insulation method is used. It is known to be effective.

Therefore, in order to obtain the advantages of both the ventilation method and the external heat insulation method, it is conceivable to use these methods in combination. In addition to the main house and rafters, a member called a ventilation rafter for forming ventilation grooves is also required in the heat insulating material, which increases the number of steps during construction and takes time and costs, etc. There was a problem.

Therefore, conventionally, as a solution to these problems, a plate made of a foamed plastic such as a rigid urethane foam having a surface covered with a surface material such as waterproof paper and having a large number of ventilation grooves formed on the surface. There is a heat insulator. This is because moisture inside the room is exhausted to the outside through the ventilation groove, which can prevent dew condensation inside the frame. In addition, foamed plastics minimize indoor heat loss and make the house airtight. Is what you can do.

Conventionally, a method of scraping the surface of the plate-like heat insulating material with a cutting tool such as a saw having a blade with a groove width together with the face material has been adopted for processing the ventilation groove of the plate-like heat insulating material.

[Problems to be solved by the invention]

By the way, as described above, in the conventional ventilation groove processing method for a plate-shaped heat insulating material, since the surface of the plate-shaped heat insulation material is scraped off with a cutting tool, dust of foamed plastics is generated during the groove processing. In addition, since the face material is completely scraped off in the ventilation groove, the waterproof property is reduced.

The present invention has been made in the background of such conventional technology, and by employing pressing instead of cutting, generation of dust at the time of grooving can be prevented, and grooving can be performed regardless of in-line or off-line, In addition, good productivity can be obtained because it can be mechanized, and furthermore, since the structure of the equipment used for groove processing is simple, maintenance is easy and plate-shaped heat insulation can be manufactured at low cost. It is an object of the present invention to provide a method for forming a ventilation groove in a material.

[Means for solving the problem]

In the present invention, a plurality of slits are formed on at least one surface of a plate-shaped heat insulating material having at least a foamed plastics layer, and a ventilation groove is formed by pressing a slit between adjacent slits with a rotating roll or a convex shape. It is intended to provide a method for producing a plate-like heat insulating material having a ventilation groove, which is characterized in that it is shaped.

In this case, it is preferable that the depth of the slit is formed to be equal to or greater than the depth of the groove, and furthermore, it is preferable that the pressing for forming the ventilation groove is a pressing force that causes permanent deformation.

[Action]

In the present invention, first, a plurality of slits are formed on at least one surface of the plate-shaped heat insulating material. At this time, in order to shape the ventilation groove, the slit is formed so that the depth of the slit is equal to or greater than the depth of the groove.

After that, the air gap is formed by pressing each of the slits adjacent to each other with a rotating roll or a convex shape.
The pressing force in this case is adjusted so that the plate-shaped heat insulating material is crushed to cause permanent deformation.

In this way, pressing is used instead of cutting to prevent dust generation during grooving, grooving can be performed irrespective of in-line or off-line, and good productivity can be achieved due to mechanization. Since it can be obtained and the structure of the device used for groove processing is simple, it can be manufactured with equipment that is easy to maintain and low in cost.

〔Example〕

Hereinafter, a method for manufacturing a plate-shaped heat insulating material with a ventilation groove according to an embodiment of the present invention will be described in detail with reference to the drawings.

In the method of manufacturing a plate-like heat insulating material having ventilation grooves according to the embodiment of the present invention, a plurality of slits 20 are formed on one surface S1 of a plate-like heat insulating material S having a foamed plastics layer 10 as shown in FIG. Thereafter, as shown in FIG. 2, every other slit 20 adjacent to each other is pressed by a pressing device (rotary roll or convex type) 30 at every other interval to form a ventilation groove 40 shown in FIG. .

As a material of the foamed plastics layer 10, for example, a rigid urethane foam, a urethane-modified isocyanurate foam, an isocyanate-modified urethane foam, an isocyanurate foam, a phenol foam, an epoxy foam, a phenol-modified urethane foam, a polystyrene foam, and the like can be used. In the embodiment, the rigid urethane foam is employed.

The thickness of the foamed plastics layer 10 is 10 to 15
0 mm, particularly 15 to 75 mm, is preferable. If it is less than 10 mm, it is not possible to secure a predetermined ventilation groove that enables moisture to be removed. on the other hand,
Since there is no change in the heat loss due to, for example, the area around the sash or the ventilation other than the heat insulating section, a heat insulating material having a thickness exceeding 150 mm is not required.

The plate-shaped heat insulating material S of this embodiment is made of a foamed plastics layer.
Although the face material layers 11, 12 are laminated on the front and back surfaces of 10, it is only necessary to have at least the foamed plastics layer 10,
In addition, for example, an intermediate layer (not shown) made of a suitable material may be provided. Further, the face material layers 11, 12 may be provided not only on both front and back faces but also on only one face.

As a material of the face material layers 11 and 12 of this embodiment, a polyolefin of a material that allows moisture to pass easily but does not allow water droplets to pass while exhausting indoor moisture to the outside and preventing rainwater from outside from entering the room. Although non-woven fabric is used,
It is not necessarily limited to this, for example, a polyolefin-based or polyvinyl-based polymer film, a metal foil (a simple substance such as an aluminum foil or an iron foil), a composite of a polyolefin-based film and paper, a polyolefin-based film and paper The material is not limited as long as it has a moisture-proof property and a waterproof property, such as a composite with an aluminum foil and an asbestos paper impregnated with asphalt.

The slit 20 shown in FIG. 1 is a slit cut into a plate-like heat insulating material S using a knife H shown in FIG. 4 such as a knife or a cutter. In this embodiment, as shown in FIG. Although formed on one surface S1 of the plate-shaped heat insulating material S in parallel in the vertical direction, it may be formed on both front and back surfaces or in parallel in the horizontal direction or both the vertical and horizontal directions.

The interval between these slits 20 is 5 to 100 mm, especially 10 to 3
0 mm is preferable, and if it is less than 5 mm, the strength of the crest formed by the groove processing is reduced, and buckling is easily caused. On the other hand, if it exceeds 100 mm, the groove processing by pressing becomes difficult.

The depth of the slit 20 does not necessarily need to be the same as the depth of the ventilation groove. For example, when using a rigid polyurethane foam, the pressing force acts as a shearing force,
A groove is formed. Therefore, the depth of the slit 20 is preferably equal to or greater than the depth of the groove, and can be appropriately selected depending on the degree of buckling of the foamed plastic layer.

The depth of the ventilation groove is preferably 5 to 30 mm, particularly preferably 15 to 25 mm. If it is less than 5 mm, there is a problem in air circulation, and the moisture elimination effect is significantly reduced. On the other hand, if it exceeds 30 mm, the moisture elimination effect remains unchanged.

Further, although the number of the slits 20 formed is not limited as long as it is two or more, as described above, every other slit 20 adjacent to each other is pressed by the roll pressing device 30 shown in FIG. Therefore, an even number is preferable.

The roll pressing device 30 is a pressing device in which the slits 20 are alternately crushed to form the ventilation groove 40 on one surface S1 of the plate-shaped heat insulating material S, but is not necessarily limited to the roll pressing device 30. Alternatively, a not-shown convex pressing device (convex type) having a plurality of stripe-shaped convex portions that can crush each other between the slits 20 may be employed.

The pressing force may be any value as long as the foamed plastic layer is crushed and permanent deformation remains, and is appropriately selected depending on the material.
For example, in the case of a rigid polyurethane foam, it is 1.5 kg / cm ² or more, preferably 2.0 kg / cm ² or more.

The specific configuration of the roll pressing device 30 will be described.
A shaft 32 is rotatably connected to a distal end of a frame 31 whose both ends are bent downward, and a metal roll 33 having a width between a pair of slits 20 is provided on the shaft 32 at an interval between the pair of slits 20. Open and fix, while frame 31
A rod 35 of an air cylinder 34 for raising and lowering the frame is attached to a central portion in the long width direction of the upper surface of the frame.

Although not shown, a stopper for regulating the lowering position of the frame 31 is attached.

By adjusting the stopper, the pressing depth is regulated. In addition, the metal roll 33 of this embodiment has a flat circular wall with both end faces shown in FIG. 6 so that the ventilation grooves 40 whose opposite groove side faces are parallel as shown in FIG. 5 can be formed. Although it has a plate shape, it is not always necessary to limit to this. For example, as shown in FIG.
8 can be formed on both end faces shown in FIG.
Any other shapes such as those having a disk shape formed with can be employed.

Specifically, as shown in FIG. 4, the production of the plate-shaped heat insulating material S is performed by discharging the stock solution 13 of the foamed plastics layer 10 onto the upper surface thereof while continuously moving one of the face material layers 11. And foam it.

On the other hand, the other face material layer 12 is loaded onto the loading conveyor 60 and transported to the double conveyor 70.

The one face material layer 11 is turned upside down during the feeding, and the foamed plastics layer 10 formed on the sheet surface is superimposed on the other face material layer 12, and this is put into the double conveyor 70. The foamed plastics layer 10 is heated and cured while passing through the double conveyor 70, and at the same time, the three members are firmly bonded by the self-adhesive force of the foamed plastics layer 10, and then the blade H A plurality of slits 20 are inserted from the face material layer 11 side with a
Then, the slits 20 are crushed alternately to form a ventilation groove 40 on one side S1 of the plate-shaped heat insulating material S, and then cut to a predetermined length by the cutter 80 again.

In this embodiment, the ventilation groove processing of the plate-shaped heat insulating material S including the slit forming step and the groove pressing step is performed in-line, but it is not necessarily limited to this, and may be performed off-line.

After that, on one side S1 of the plate-shaped heat insulating material S of this embodiment,
As shown in FIG. 9, usually, for example, a plywood, a particle board, a hard board, a hard wood chip cement board, a siding material, a lath board, etc., are laminated via an adhesive. It is not necessary.

The manufactured plate-shaped heat insulating material S with the exterior material 90 is assembled to a shaft assembly (not shown) with the exterior material 90 side facing the outside and the length direction of the ventilation groove 40 facing the vertical direction of the wall.

The ventilation groove forming method for the plate-shaped heat insulating material according to the embodiment of the present invention can prevent the generation of dust at the time of groove processing because the pressing processing is employed instead of the cutting processing, and regardless of in-line or off-line. Grooves can be formed, and good productivity can be obtained because of the mechanization by using the roll pressing device 30 and the like. Furthermore, the structure of each device used in the slit forming step and the groove pressing step is simple. Therefore, maintenance is easy and low-cost equipment may be used, and the moisture-proof and waterproof properties of the plate-shaped heat insulating material S can be improved.

The embodiments of the present invention have been described above. However, the present invention is not limited to the embodiments, and includes changes in the configuration and operation within the scope not departing from the gist of the present invention.

For example, the groove pressing step of forming a ventilation groove is not limited to forming a ventilation groove by pressing a rotating roll or a convex portion on a plate-shaped heat insulating material being conveyed, for example, a surface of a stationary plate-shaped heat insulating material. Alternatively, a rotary roll or a convex mold may be pressed while moving to form the shape.

〔The invention's effect〕

Since the present invention employs pressing instead of cutting as described above, the effect of preventing generation of dust at the time of grooving can be obtained, and the effect of grooving irrespective of in-line or off-line can also be obtained. In addition, the mechanization is possible, so that good productivity can be obtained, and the equipment used for grooving is simple, so that maintenance is easy and low cost equipment. The effect that it can be manufactured by this is also obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view of the plate-like heat insulating material after the slit forming step of the method of manufacturing a plate-like heat insulating material with ventilation grooves according to the present invention, and FIG. 2 is a groove pressing step of the method of manufacturing the plate-like heat insulating material with ventilation grooves. FIG. 3 is a perspective view of a plate-shaped heat insulating material manufactured by employing the method of manufacturing a plate-shaped heat insulating material with a ventilation groove, and FIG. 4 is a method of manufacturing the plate-shaped heat insulating material with a ventilation groove. 5 is an enlarged sectional view of a ventilation groove, FIG. 6 is an enlarged front view of a metal roll used in a groove pressing step, FIG. 7 is an enlarged sectional view of another ventilation groove, FIG. 8 is an enlarged front view of another metal roll used in the groove pressing step, and FIG. 9 is a perspective view of a plate-like heat insulating material to which an exterior material is adhered. S; Plate insulation S1; Single side 10; Plastic foam layer 20; Slit 30; Roll pressing device (Rotating roll or convex type) 40; Vent groove

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B32B 31/16 B32B 3/30 B32B 5/18 E04B 1/80 B29C 59/02

Claims (3)

(57) [Claims] 1. A plurality of slits are formed on at least one surface of a plate-shaped heat insulating material having at least a foamed plastics layer, and a ventilation groove is formed by pressing a slit between adjacent slits with a rotating roll or a convex shape. A method for producing a plate-like heat insulating material having a ventilation groove, wherein the heat insulating material is shaped. 2. The method according to claim 1, wherein the depth of the slit is equal to or greater than the depth of the groove. 3. The method for producing a plate-shaped heat insulating material with ventilation grooves according to claim 1, wherein the pressure for forming the ventilation grooves is a pressing force that causes permanent deformation. .