JPS60151046A - Manufacture of sandwich board - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a sandwich board, in which a foamable reaction mixture having self-adhesive properties is interposed between two base materials, and at least one of the two base materials is embossed. The present invention relates to a method for continuously manufacturing a sandwich board having a base material.

Recently, as interior and exterior materials for buildings, insulation and weight reduction,
Sand inch plates are mass-produced using a metal plate that has both rigidity and rigidity as one base material. However, most of the sand-inch boards are products that improve the coldness and smoothness of the metal, have a rich design and three-dimensional effect (embossed pattern), and suppress the physical properties of the material (flexibility). I can't do it. Furthermore, even if they existed, they only had a limited number of colors, thicknesses, and patterns, and in reality they were no more than mere metal composite plates.

Furthermore, when a foamable reaction mixture, for example a synthetic resin raw material such as polyurethane resin, is used as a core material, the formation of the foam involves a chemical reaction that is greatly affected by various factors such as temperature. There has been a desire for a manufacturing method that can respond to temperature changes. In addition, it is known that the conventional manufacturing method involves embossing by simply interposing an embossing machine between an uncoiler and a molding machine, but there are many cranks on the uneven pattern surface after processing. It had the drawbacks of poor weather resistance, poor corrosion resistance, and poor appearance. Furthermore, since this type of method conventionally used is a simple linear line process, the plastic foam raw material is supplied from the back side of the front material or back material, making it easy to spread and disperse the raw material. It wasn't.

In order to eliminate such drawbacks, the present invention prevents cracks, peeling, cracks, and scratches that occur in the coating film during embossing by heating a coiled thin metal plate and then embossing it. After the residual strain during embossing is released, the metal sheet is greatly curved inward and turned over. Next, the thin metal sheet is formed into a predetermined shape and heated to approximately 50 to 90 degrees Celsius, and then the plastic foam raw material is formed. This paper proposes a method for manufacturing sand-inch boards that can continuously and economically produce sand-inch boards with a predetermined cross-sectional structure by discharging the material, laminating face materials, and feeding this to a curing oven. be.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The method for manufacturing a sanderch board according to the present invention will be described in detail below with reference to the drawings. FIG. 1 is a schematic configuration diagram showing an example of an apparatus used for carrying out the above method. (hereinafter simply referred to as a coil) is U
It is configured to move along a trajectory that draws a character. To explain further, 2 is an uncoiler for mounting a coil A having a decorative coating film wound into a coil shape and feeding it to the first pinch roller 3. The first pinch roller 3 is driven by a motor (not shown) and has a coil A.
is fed to the loop section 4 at a predetermined speed.

The loop part 4 is the coil A when embossing the coil A.
In addition to controlling the supply state of the coil, it also functions as a relief part to prevent huge force from being suddenly applied to the coil.

The coil A is fed from the loop part 4 using a guide roller.
When the coil A is guided and fed to the t-heater 6 and is pinched by the second pinch roller 7, the upper roller 5a
The lower roller 5b, which is separated from and driven, functions as a guide. In addition, the heater 6 heats the decorative coating film of the coil A and the steel plate to about 30 to 60°C to soften the baked decorative coating film, and prevents the decorative coating film from peeling off from the steel plate during embossing or cracking. This prevents scratches and cracks from occurring. The heating method is one of hot air method, direct flame method, and hot wire method. A third pinch roller 7 feeds the coil A to the embossing roll at a predetermined speed and functions as a brake against the movement of the coil A during embossing. The embossing rolls ↓ are upper and lower rolls 8a and 8b with a pattern consisting of male and female uneven parts formed on the outer peripheral surface.
The gap between the upper and lower rolls 8a and 8b is determined by the height of the uneven portion,
This is determined by the thickness of the coil A.

The main purpose is to correct the residual strain existing in the coil A embossed with a leveler, and as extracted and shown in Fig. 2, the upper and lower rollers 9a+, 9a2.9as, . . . 9
an (shown up to 9a3 in the figure), lower roller 9b1.9
b2, 9b3, . . . 9bn (shown up to 9b4 in the figure) are arranged in a zigzag pattern in the vertical direction, and the upper roller group 9a+, . . . 9an and the lower roller group 9
The gap G between b+, . . . 9bn can be adjusted between groups or between each roller. 10 is a fourth pinch roller that speeds up the rotation of the embossing roll ↓, and passes through the embossing roll 8 and leveler steps with the coil A in tension. Of course, if the fourth pinch roller 10 has a tensioning function in the next step, it is also possible to replace it with a roller that simply functions as a guide. The earthwork is used to feed the coil A from the second floor to each process on the first floor using a reversing machine, and also to turn the front side of the coil A into the back side, and consists of a group of guide rollers 12 and a curved guide plate 13. , the guide rollers can be brought into contact or separated by a switch (not shown). The curved guide plate 13 is a curved flat plate with guide pieces on both sides, and 14 is a sensor that speeds up the feeding of the coil when the coil A reaches a certain height.
The zone between the curved guide plate 13 and the molding machine 15 is designed to function as a loop. Molding machine 1
5 is a coil A having a single or double width (not shown), for example, as shown in FIG.
17 is a guide roller, and 18 is a conveyance roller. Reference numeral 19 denotes a discharge section, in which a self-adhesive foamable reaction mixture P (hereinafter simply referred to as a mixture) is applied to the back side (single side) of the coil A. ), injection method, etc.

Note that as the mixture P, a thermosetting foamable synthetic resin is used. 20 is a backing material supply unit which supplies backing material B, such as metal foil,
One or two types of asbestos paper, kraft paper, aluminum foil, plastic sheet, asphalt felt, etc.
A laminate of seeds or more is laminated on the mixture P, for example, an uncoiler (not shown) and a guide 21.
and a detector 22 provided as necessary. To explain further, the guide 21 guides the backing material B onto the coil A, and determines the timing for bringing the backing material B into contact with the mixture P depending on the state of the mixture P (so-called self-adhesiveness of the mixture). It has the function of making more effective use of the dispersion of the mixture P) and evening out the uneven dispersion of the mixture P. Its configuration includes one roller or Figures 4(a) to (el).
The configuration is shown in . That is, the figure (a) shows a guide in which rollers 21a1, 21a2, etc. are arranged in parallel at the same height, and the figures ib1 and fo1 show the roller 21a1.
,...21an are arranged at a certain angle θ with respect to the traveling direction of the coil A. The td1 figure shows the rollers 21al,...21an in the guide shown in the fa1 figure.
A guide with a candy-like spreading plate 23 interposed between them (Fig. 81 is a guide in which the roller 21 in Fig. 111 is arranged with a gap regulating plate/spreading plate 24 and a roller group 25 as shown in the figure). The machine 22 detects cutting, damage, etc. of the backing material B, and accordingly generates a signal to stop the operation of the discharge section 19.The principle is that the detection machine uses electricity, magnetism, heat, and tension difference. 25 is a mold that conveys the mixture P with it interposed between the coil A and the backing material B, reacts and foams the mixture P in a good environment, and forms it into a sandwich plate S of a predetermined thickness. Specifically, a steel belt or a caterpillar, for example, is engaged between the drive shaft 26.27 and the driven wheel 28.29, and reinforcing rollers 32 are arranged on the back side of the upper and lower mold members 30.31. Heating devices 33 and 34 are provided on the back side of the mold members 32, and a space containing the entire mold members is sealed with a cover 35.To explain further, the reinforcing roller 32 is connected to the upper and lower mold members 3.
0.31 is used to prevent the mixture P from being deformed by the foaming pressure, and the heating devices 33 and 34 heat the inside of the mold at a temperature of 50 to 90 degrees.
This is to keep the mixture P at a temperature of 0.degree. C. to complete the reaction of the mixture P within a predetermined time and to exhibit predetermined physical properties.

In addition, the cover 35 is used to keep the inside of the mold warm and to prevent the release of trichloromonofluoromethane released during the reaction of the mixture P, or carbon dioxide gas, -carbon oxide, etc. released from the heating device into the working environment for safety and hygiene reasons. This is to obtain a more effective heat retention effect. Note that only the exit portions 25a and 25b of the mold 25 are structured to prevent leakage of gas within the mold 25 to the maximum extent possible.

Next, a method for manufacturing a sandwich board according to the present invention will be explained in detail. That is, the coil A is attached to the uncoiler 2 and fed to the loop section 4 via the first pinch roller 3. Next, the coil A is guided by the second pinch roller 5 through the loop portion 4 and is fed to the heater 6. Note that the second pinch roller 5 functions as a pinch roller only when the coil A reaches the third pinch roller 7 for the first time, and after that, the upper roller 5a rises and the lower roller 5b acts as a mere guide roller. . Next, the coil A fed to the heater 6 is heated to about 30 to 60° C. to soften the decorative coating to a predetermined hardness, and then fed to the embossing roller via the third pinch roller 7. To explain further, if embossing is performed without heating coil A or when it is heated too much, the decorative coating may peel, crack, or be damaged.
This is because it causes cranking, shrinkage, etc. In other words,
If the decorative coating film of coil A is not heated, the above-mentioned phenomenon will occur due to deformation (processing) that exceeds the elasticity of the decorative coating film, and if the heating temperature is increased to 60°C or higher, the resin content of the decorative coating will soften. If the adhesive force between coil A and the decorative coating film is lowered, the decorative coating film may become closer to the coil A.
This is because there is a risk that the material may peel off from the surface, shrink, or lack scratch resistance.

Furthermore, if the heating temperature is lower than about 30° C., the resin component of the decorative coating loses its softness and increases hardness, which may cause the decorative coating to crack or significantly reduce its scratch resistance. Next, coil A exits the heater 6 and the third pinch roller 7
The embossing roll is mainly fed by the rotation of the embossing roll, and the main embossing roll continuously forms an embossed pattern on the coil A consisting of a concave part α and a convex part β as shown in FIG. 5, for example. . The coil A that has left the main embossing roll is corrected by a leveler (2) to remove residual strain during embossing while being stretched by a fourth pinch roller 10, and then fed onto a reversing machine. The coil A that has passed over the reversing machine is fed to the molding machine 15 through the space where the level sensor 14 is located.
) to (hl) and fed to the preheater 16. In the preheater 16, the coil AtJ4330~90℃
The sample is heated to 100% and fed to the entrance of the mold 25 via the guide roller 17. Further, from the discharge part 19, the mixture P which is undergoing reaction and foaming is discharged onto the back surface of the coil A, and the back material B is guided and laminated thereon via the guide 21. Note that the discharged mixture P is spread by the guide 21 and is regulated to a certain thickness. Next, in the mold 25, the mixture P reacts and foams, changing into, for example, cream time, gel time, and rise time, and sandwich panels S having a shape as shown in FIG. 6 are continuously delivered from the outlet 25b. Next, the sandwich panel S is cut into a predetermined length using a cutter (not shown) to produce a product.

What has been described above is only one embodiment of the method for manufacturing a sandwich board according to the present invention, and it can also be manufactured by forming as shown in FIGS.

That is, Fig. 7+al shows the case where the upper and lower mold members 30 and 31 are formed by a group of rollers to produce a sanderch board 2, and Fig. fb1 shows the case where the mixture P is discharged onto the back material B to produce a sanderch board. This is the case. In addition, FIG. 8 (al~(C1 is the shape of coil A, +
8) As shown in 9, it is also possible to manufacture a sanderch board using a coil A that has a simple plate shape, (bl, (C1), and a simple gutter shape as shown in the figure).

As described above, according to the method for manufacturing a sandwich board according to the present invention, a coil having a decorative coating film on the surface of 30 to 30
Because it was heated to 60°C, any uneven pattern can be embossed on the decorative coating without causing any cranks, scratches, peeling, cracking, or shrinkage.

■During embossing, a constant tension is applied to the coil, so the uneven pattern does not shift during embossing, and a beautiful uneven pattern can be formed. ■Residual distortion during embossing can be removed by passing the material through a leveler under tension, so it will not bend or twist. ■The decorative coating does not crack or peel during embossing, so it has excellent weather resistance, scratch resistance, and chemical resistance.

■U-shaped coil from embossing to molding l1iI'
Since the coil is reversed at L trace 3, the coil is not forced to bend, and each process is smoothly connected. (2) Since the coil is heated and the mixture is discharged into it, the mixture can be reacted and foamed in a good condition, and a uniform foam structure can be formed between the coil and the backing material. ■Since the inside of the mold is sealed, heat retention is improved, and leakage of harmful gases and combustion gases into the working environment is reduced, greatly improving worker safety and hygiene. ■Since the timing of contact between the back material and the mixture can be easily and freely selected, the upper base material can be reliably bonded, greatly improving the strength of the sandwich board. It has the following characteristics.

[Brief explanation of drawings]

Fig. F is a schematic configuration diagram showing an example of an apparatus for carrying out the method for manufacturing a sanderch board according to the present invention, Fig. 2 is a perspective view showing a leveler, and Figs. 3 (a) to (h) are forming of a thin metal plate. FIG. 4 is an explanatory diagram showing an example of the guide, FIG. 5 is a perspective view showing an example of an uneven pattern formed by embossing, and FIG. A sectional view showing an example of a 21-inch plate manufactured by such a method, FIG. 7+al, (h
1 and FIG. 8 ta+ to tc+ are explanatory diagrams showing other embodiments. Earth... Frame, 6... Heater, 1)... Emboss roll, Work... Leveler, Earthwork... Reversing machine, 15... Forming machine, 16... Break heater, 19... Discharge Part, 25
...Type, 35...Cover. 5 (e) No 6 No figure 7 Tana δ Figure (mu) 258-

Claims (1)

[Claims] +11 A thin metal plate wound into a coil is heated to 30 to 60℃.
The thin metal plate is heated to a temperature of 100 degrees, then embossed, then the distortion of the metal sheet is corrected, it is greatly curved inward, and then turned over. The formed metal thin plate is heated to 50 to 90°C, and then the reacted and foamed plastic foam raw material is discharged onto the back side of the metal thin plate, the back material is placed on top of this, and the material is regulated into a certain shape. A sand inch plate is heated to 50 to 90°C in a heated state, and fed in a continuous band as a sand inch plate with plastic foam filled between the thin metal plate and the backing material, and then cut into a predetermined length. Method of manufacturing the board.