JPH0643075B2 - Laminated heat insulating plate, its manufacturing method and manufacturing apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention sandwiches both sides of a synthetic resin foam with two plate-like or sheet-like face materials, and both sides of the synthetic resin foam with face materials. The present invention relates to a laminated heat insulating plate formed by coating, a manufacturing method thereof, and a manufacturing apparatus.

[Conventional technology]

BACKGROUND ART Conventionally, a laminated heat insulating plate obtained by injecting a foaming urethane resin liquid between a front material and a back material made of corrugated steel sheets and foaming them has been used as a heat insulating roof material, wall material and the like. Polyurethane foam is exposed at the peripheral end faces of these laminated heat insulating plates.

As a method of covering the end surface of a synthetic resin foam sandwiched between two surface materials, as shown in JP-A-49-107371, after forming a laminated heat insulating plate, an adhesive tape is attached to the end surface. Or a method of forming a coating film by applying a non-foaming synthetic resin liquid to the end surface thereof, JP-B-46-46
No. 71 or Japanese Patent Laid-Open No. 63-185612, at the time of foam molding of a laminated heat insulating plate, a tape-shaped or narrow plate-shaped covering material different from the surface material is disposed on the end face of the laminated heat insulating board to integrally form the same. There is known a method of foam-bonding to.

[Problems to be solved by the invention]

A barn laminated heat insulating plate made by sandwiching a heat insulating material such as polyurethane foam between the conventional corrugated steel plate and other face materials,
When used as a roofing material or wall material for poultry houses etc., if the end surface of the heat insulating material is exposed, harmful insects such as larvae of the beetle worm will invade from the end surface, and the heat insulating material will be eaten by the foamed resin, causing a large amount of damage. However, there is a problem that the inside of the heat insulating material is almost hollow and the heat insulating property is deteriorated.

In order to prevent this, a method of sticking an adhesive tape or the like on the end face is poor in durability and may be peeled off during long-term use, and the insect repellent effect is not perfect only by coating the end face with paint. Further, the method of arranging the covering material on the end face and integrally foam-bonding at the time of manufacturing the laminated heat insulating plate has a drawback that the process is complicated and the manufacturing cost is increased. Furthermore, when a conventional laminated heat insulating plate is used as a roofing material or an outer wall material so that a plurality of laminated heat insulating plates are arranged side by side and adhered to each other, the gap between the adjacent laminated heat insulating plates is filled with a filler or elastically sealed. It is necessary to interpose materials. Especially when it is used as a roofing material, it is difficult to completely prevent the infiltration of rainwater.

Therefore, according to the present invention, in a laminated heat insulating plate in which a synthetic resin foam is sandwiched between two face materials, most of the end surface of the synthetic resin foam is covered, and there is no fear of insect damage, and the laminated heat insulation is easy to manufacture. A plate and a method of manufacturing the same, and a method of performing a work without gaps by superimposing a part of the adjacent laminated heat insulating plates on each other when the plurality of laminated heat insulating plates are attached so as to be adjacent to each other It is an object to provide an apparatus used for manufacturing.

[Means for solving problems]

In order to achieve the above object, the inventors of the present invention have conducted extensive studies, and as a result, bend the end portion of the back surface material that constitutes the laminated heat insulating plate and bring it into contact with the surface material, and make a synthetic resin between the surface material and the back surface material. It was found that by foaming, it is possible to easily obtain a laminated heat insulating plate with an excellent insect repellent effect covering the end surface of the heat insulating material,
The present invention has been completed.

That is, the present invention relates to a laminated heat insulating plate in which a surface material made of a metal plate or a synthetic resin plate, a heat insulating material made of a synthetic resin foam, and a sheet-shaped back surface material made of metal, synthetic resin or paper are laminated. The back surface material is bent toward the surface material side along both side edges of the heat insulating material parallel to the longitudinal direction of the plate to join the end surface of the heat insulating material to cover the end surface, and one side of the surface material or The heat insulating material and the back surface material are not laminated in a portion having a constant width along two adjacent pieces, and only a surface material is formed, and a superimposing portion for overlapping adjacent laminated heat insulating plates at the time of construction is formed. The summary is a laminated heat insulating plate.

Another aspect of the present invention is to foam a long surface material while keeping it horizontal and transporting it along its longitudinal direction while leaving a portion on one side along the longitudinal direction of a constant width on the upper surface of the surface material. Step of continuously spraying a synthetic resin solution, and continuously bending both side edges of the back material made of a long sheet downward by a certain width, and foaming the back material on the surface material. A step of continuously superimposing on the resin, a front surface material and a back surface material sandwiching the foamable synthetic resin being pressed and held to a constant thickness from above and below, and pressing both side bent portions of the back surface material from both sides. The gist of the present invention is a continuous manufacturing method of a laminated heat insulating plate, which comprises a step of maintaining the foaming synthetic resin liquid at a foaming curing temperature and carrying the same.

Still another aspect of the present invention is a conveying means for keeping a plate-like surface material horizontal and conveying it along the longitudinal direction thereof, and a part having a constant width on one side along the longitudinal direction on the upper surface of the surface material being conveyed. A means for spraying or applying the foamable synthetic resin liquid remaining, a bending means for continuously bending the long sheet-shaped backing material at substantially constant angles from both side ends thereof, respectively, and a foamable synthetic resin liquid. A pressing and conveying means for superimposing the back surface material on the surface material having been sprayed or coated on the upper surface and conveying the back surface material while pressing it from above and below, and folding the back surface material from both sides in the conveyance direction at the same time during the pressing and conveying operation. A gist of a laminated heat insulating plate manufacturing apparatus is provided with a pressing unit that presses a curved portion and a heating unit that heats a conveyed product being pressed and conveyed to a foaming curing temperature of the expandable synthetic resin liquid.

In the laminated heat insulating plate of the present invention, the surface material is a steel plate, a galvanized steel plate, a metal plate such as an aluminum plate, a synthetic resin plate, a glass fiber reinforced synthetic resin plate, a gypsum board, a surface of a known laminated heat insulating plate such as flame retardant paperboard. Any plate material used as a material can be used. The surface material may have a flat plate shape, but a corrugated plate having a corrugated cross section or a corrugated folded plate may also be used.

As the back material, paper, synthetic resin film, metal foil, or the like can be used, and a sheet material in which these are laminated is also used.

As the synthetic resin foam used as the heat insulating material, thermosetting resin foams such as polyurethane foam, phenol resin foam, urea resin foam and melamine resin foam are preferably used, and hard synthetic resin foam is particularly preferably used. Further, polystyrene foam, polyethylene foam and other thermoplastic synthetic resin foams can also be used.

The thickness of the synthetic resin foam is not particularly limited, but is 10 to 5
A thickness of 0 mm is commonly used.

As for the heat insulating material, a portion having a constant width along one side or two adjacent sides of the surface material is provided with only the surface material without providing the heat insulating material.

〔Example〕

Next, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view of an example of the laminated heat insulating plate of the present invention. (1) is a surface material made of a corrugated sheet of galvanized steel sheet, and has grooves of the corrugated sheet in the longitudinal direction. (2) is a heat insulating material made of rigid polyurethane foam, and (3) is a back material made by laminating aluminum foil on one side of kraft paper.

As shown in FIG. 1, a heat insulating material is provided at a certain width (width of 1 to 3 crests of the corrugated sheet) along one edge of the both side edges parallel to the groove of the corrugated sheet of the surface material. Instead, the back side remains corrugated and overlapped
It is preferable to leave it as (4) and to superimpose the overlapping portion (4) on the adjacent laminated heat insulating plate (5) as shown in FIG. In this case, at the side edge where the heat insulating material (2) is provided up to the end of the surface material (1), the end of the bent portion (6) of the back surface material (3) is cut off at the position where it abuts the surface material (1). However, the bent portion (6) on the overlapping portion (4) side of the back surface material (3) is in contact with the surface material (1) and then bent along the corrugated plate of the surface material (1), Direct surface material
It is overlaid and joined to (1).

A fixed width (about 5 mm) at one end of the laminated heat insulating plate (5) in the longitudinal direction.
Most of the backside material (3) and the heat insulating material (2) are cut away (0 to 100 mm). This is to prevent rainwater from penetrating into the heat insulating material (2) along the heat insulating material on the back side of the eaves when the laminated heat insulating plate is used as a roof material.

FIG. 3 is a front view showing an outline of an example of a laminated heat insulating plate manufacturing apparatus of the present invention. (7) is a coil of zinc-aluminum-plated steel sheet that is the raw material of the surface material (1), and (8) is a roll former that forms a steel sheet (9) drawn from the coil (7) into a corrugated shape through a number of corrugating rolls. And (10) is a preheater for preheating the surface material (1) made of corrugated steel plate that has exited the roll former (8). (11) is a nozzle for spraying the foamable urethane resin reaction liquid on the surface material (1), and reciprocates in the direction perpendicular to the conveying direction of the surface material (1) while To jet.

(12) is a backing material roll, and the backing material (3) pulled out from this is bent at right angles at both sides by a bending roll (13) at positions of a certain width. The folding roll (13) is composed of, for example, a pair of stepwise different diameter rolls rolling in contact with each other as shown in FIG. 4, and the side end of the backing material (3) is passed between them to form a side roll. The ends can be bent down at a right angle.

(14) is a curing chamber, the inside of which is maintained at the curing temperature of the polyurethane foam (for example, 60 ° C.), and has a double conveyor (15) consisting of a pair of conveyors vertically arranged at regular intervals. . The lower conveyor (16) is composed of a slat conveyor, and the upper conveyor (17) is an endless rubber sheet suspended by being wound between a driving roll (21) and a guide roll (22).
(19) and a belt conveyor provided with a large number of pressing rolls (18). The endless rubber sheet (19) of the upper conveyor (17) is wrapped around the outer circumferences of both ends of the endless rubber sheet (19) and wound with rubber belts (20) and (20) 'having different cross-sectional shapes. One Rubber Belt (20)
Has a rectangular cross section, the cross section of the other rubber belt (20) 'is laterally long and the lower surface has a corrugated shape that matches the corrugation of the surface material (1). These two rubber belts (20), (20) 'are endless and are closely attached to the outer peripheries of both end portions of the endless rubber sheet (19) of the upper conveyor (17) and integrated with the endless rubber sheet (19). Rotate to. As shown in the sectional view of FIG. 5, the rubber belts (20) and (20) 'closely contact the outside of the bent portion (6) of the backing material (3) and move at the same speed. A plurality of pushers (25) made of elongated metal pieces are arranged along both sides of the portion of the rubber belts (20), (20) 'that closely adheres to the bent portion (6) of the backing material (3), It is pressed inward by an air cylinder (not shown) or the like as shown by an arrow a. The rubber belts (20) and (20) 'slide on the pusher (25) and move while being pressed inward.

Before passing the backing material (3) through the folding roll (13), if you place a perforation at the bending position, it will be easier to bend at the specified position and the gas generated during foaming of the heat insulating material (2) will be discharged. Can be made easier.

(23) is a cross cutter, consisting of a rotating disk saw,
While its rotation axis moves at the same speed as the conveying speed according to the conveying direction of the laminated heat insulating plate (5), the rotating disk saw crosses the laminated heat insulating plate (5) in the direction perpendicular to the conveying direction and moves it over a predetermined length. Cut to size.

Laminated on the rotary disc saw for cutting of the cross cutter (23) and attached a large number of disc saw blades (24) of the same diameter smaller than this to a certain thickness, and integrated with the rotary disc saw for cutting. When the laminated heat insulating plate (5) is rotated, the back surface material (3) and the heat insulating material (2) having a constant width at the end of the laminated heat insulating plate (5) can be cut and removed at the same time.

[Action]

In order to manufacture the laminated heat insulating plate (5) by the apparatus of the embodiment of the present invention, the steel plate (9) drawn from the steel plate coil (7) is passed through the roll former (8), and a corrugated steel plate having a groove in the longitudinal direction is formed. Form it and pass it through a preheater (10) at 60-80 ° C for about 4
Preheat to 0 ° C. On the preheated corrugated steel plate (9), a foamable urethane reaction liquid obtained by mixing a polyol, a polyisocyanate, a liquid chlorofluorocarbon gas and the like is uniformly sprayed from a nozzle (11).

Overlapping part without heat insulating material (2) on one side of laminated heat insulating plate (5)
In order to form (4), the foamable urethane reaction liquid is sprayed leaving a constant width on one side of the surface material (1).

The foamable urethane reaction liquid is composed of the same components as the reaction liquid for producing a known rigid polyurethane foam, and is a mixed liquid of a foaming agent such as a polyol, polyisocyanate, and liquid freon gas, a reaction accelerator, a crosslinking agent, and other necessary additives. Immediately before jetting from the nozzle (11), three components of a polyol component, a polyisocyanate component and a foaming agent component are mixed.

The sprayed urethane reaction liquid immediately starts to react while foaming.

On the other hand, the backing material (3) pulled out from the backing material roll (12)
The both sides are passed between a pair of folding rolls (13), and the side portions having a required constant width are bent downward at substantially right angles. When forming the overlapping part (4), the bending width on the left and right is not the same, and the bending on the side forming the overlapping part (4) of the laminated heat insulating plate (5) whose surface material (1) is a corrugated plate. Increase the width of part (6).

Double-conveyor (15) in the curing chamber (14) kept at the curing temperature by stacking on the polyurethane foam while foaming the backing material (3) with the bent part (6) formed on the surface material (1). Send in between. The two rubber belts (20), (20) are pressed from above and below between the double conveyors (15) and kept at a constant thickness, and from the outside of the left and right bent portions (6) of the back surface material (3). ′ And the pusher (25) on the outside thereof move while being heated to the curing temperature pressed inward.

When forming the overlapping part (4), the rubber belt (2
It is preferable that 0) ′ is further bent along the surface material (1) at the end of the wide bent portion (6) of the back surface material (3) so as to be superposed on and closely attached to the surface material (1). By doing so, the self-adhesive force when the urethane reaction liquid that slightly penetrates between the surface material (1) and the back surface material (3) is cured by reaction, the end portions of the surface material (1) and the back surface material (3) Is reliably bonded.

Even at the side edge opposite to the superposed portion (4) of the surface material (1), the width of the bent portion (6) of the back surface material (3) is made slightly larger than the thickness of the heat insulating material (2), If the end of the bent portion (6) is bent as shown in FIG. 5 so as to be sandwiched between the rubber belt (20) and the lower conveyor (16) and moved, the surface material (1) becomes Back material (3)
It is possible to prevent the urethane reaction liquid from leaching from between the lower ends of the bent portions (6) and contaminating the rubber belt (20).
In this case, after leaving the curing chamber (14), the end of the bent portion (6) laterally protruding from the end of the surface material (1) is cut off with a cutter (26).

While the front surface material (1) and the back surface material (3) are pressed from above, below, left and right and kept at a certain dimension, urethane foams and cures, so the laminated heat insulating plate (5) expands in the thickness direction and width direction due to foaming pressure. Without finishing, it is finished to a certain size. Since both sides of the laminated heat insulating plate (5) are closed by the bent parts (6), it is necessary to cut off the protruding urethane foam without the foamed and expanded urethane foam being pushed out from the end surface and polluting the device. Nor. Further, as a result of the foaming pressure of the urethane foam becoming uniform inside the laminated heat insulating plate (5), the density of the urethane foam becomes uniform.

After the curing of the heat insulating material (2) made of urethane foam is completed, the long laminated heat insulating plate (5) carried out from the curing chamber (14) is cut into a predetermined length by the cross cutter (23). .
At the same time, if necessary, the backside material (3) and the heat insulating material (2) at the part of one end adjacent to the cut surface may have a disc saw for cutting.
It is cut by (24).

The end surface of the heat insulating material (2) formed by cutting with the cross cutter (23) has a small area, and can be completely covered with insect repellent by applying a synthetic resin paint containing an insecticide.

〔The invention's effect〕

According to the laminated heat insulating plate and the manufacturing method thereof of the present invention, the end surface parallel to the longitudinal direction of the laminated heat insulating plate (5) of the heat insulating material (2) made of a synthetic resin foam is not exposed at all, and due to feeding damage by pests, There is no risk of deterioration of the heat insulation effect. The heat insulating material (2) is uniformly filled, the foam does not overflow, and the production equipment is not contaminated during foaming.
The heat insulating material (2) of the laminated heat insulating plate (5) is the bent part (6) of the back material (3)
With this, it can be manufactured easily and inexpensively without requiring a special covering material. The bent portion (6) completely adheres to the synthetic resin foam and has a very remarkable effect such as no possibility of peeling during use.

[Brief description of drawings]

FIG. 1 is a perspective view of an example of the laminated heat insulating plate of the present invention, FIG. 2 is a perspective view showing a usage state of the example of the laminated heat insulating plate of the present invention, and FIG. 3 is a manufacturing apparatus of the laminated heat insulating plate of the present invention. The front view which shows the outline of an example, FIG. 4 is sectional drawing of the bending roll of the manufacturing apparatus,
FIG. 5 is a sectional view taken along the line AA in FIG. (1) …… Surface material, (2) …… Insulation material, (3) …… Backside material, (4) …… Overlapping part, (5) …… Laminate insulation plate, (6) …… Bending part, (7) …… Coil, (8) …… Roll former, (9) Steel plate, (10) …… Preheater, (11) …… Nozzle, (12) …… Backside material roll, (13) …… Bending rolls, (14) …… Curing chamber, (15) …… Double conveyor, (16) …… Lower conveyor, (17) …… Upper conveyor, (18) …… Pressing roll, (19) …… Endless Rubber sheet, (20), (20) ′ …… Rubber belt, (21) …… Drive roll, (22) …… Guide roll, (23) …… Cross cutter, (24) …… Cutting disk saw, ( 25) …… Pusher, (26) …… Cutter.

Continuation of front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display location // B29K 101: 10 105: 04 B29L 9:00 4F (56) References JP-A-55-37306 (JP, JP, A)

Claims (5)

[Claims] 1. A laminated heat insulating plate comprising a surface material made of a metal plate or a synthetic resin plate, a heat insulating material made of a synthetic resin foam, and a sheet-shaped back surface material made of a metal, a synthetic resin or paper, which are laminated and heat-insulated. The back surface material is bent toward the surface material side along both side edges of the heat insulating material parallel to the longitudinal direction of the plate to bond the end surface of the heat insulating material to cover the end surface, and at the same time,
The heat insulating material and the back surface material are not laminated on a side or a portion of a constant width along two adjacent pieces, and only a surface material is formed, and an overlapping portion for overlapping adjacent laminated heat insulating plates at the time of construction is formed. Laminated insulation board characterized by. 2. The synthetic resin foam is a thermosetting synthetic resin foam, and the bent portion of the heat insulating material and the back surface material is insulated by the adhesive force of the synthetic resin foam during foaming and curing. The laminated heat insulating plate according to claim 1, which is joined to a material and the surface material. 3. The laminated heat insulating plate according to claim 1, wherein the surface material is a surface material having a corrugated cross section. 4. A foaming property that keeps a long surface material horizontal and conveys it along its longitudinal direction while leaving a portion on one side along the longitudinal direction of a constant width on the upper surface of the surface material. A step of continuously spraying the synthetic resin liquid, and after continuously bending both ends of the back surface material made of a long sheet by a predetermined width, the back surface material is foaming on the surface material. A step of continuously superimposing on the resin, a front surface material and a back surface material sandwiching the foamable synthetic resin being pressed and held to a constant thickness from above and below, and pressing both side bent portions of the back surface material from both sides. A continuous manufacturing method of a laminated heat insulating plate, which comprises a step of maintaining a foaming synthetic resin liquid at a foaming curing temperature and carrying it. 5. A conveying means for keeping a plate-shaped surface material horizontal and conveying it along the longitudinal direction thereof, and leaving a part of a constant width on one side along the longitudinal direction on the upper surface of the surface material being conveyed. A means for spraying or applying the foamable synthetic resin liquid, a bending means for continuously bending the long sheet-shaped backing material at substantially constant angles from both side ends thereof, respectively, and a foamable synthetic resin liquid for the upper surface. A pressing and conveying means for superposing the folded back surface material on the surface material which has been sprayed or applied onto the front surface material and carrying it while pressing it from above and below, and folding the back surface material from both sides in the carrying direction at the same time during the pressing and conveying operation. An apparatus for manufacturing a laminated heat insulating plate, comprising: a pressing unit that presses a curved portion; and a heating unit that heats a conveyed product being pressed and conveyed to a foaming curing temperature of the foamable synthetic resin liquid.