JPS61112645A - 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 relates to a sandwich board, a base material in which a foamable reaction mixture having self-adhesive properties is interposed between two base materials, and at least a metal hoop material serving as a surface material is embossed. The present invention relates to a method for continuously manufacturing two-striped sand inch boards having the following properties.

Recently, as interior and exterior materials for buildings, insulation and weight reduction,
Sandwich plates are being mass-produced using a thin metal plate that has both rigidity and rigidity as a base material. However, all sand inch plates have a so-called design that improves the coldness and smoothness of thin metal plates.
There are almost no products that have a rich three-dimensional effect (enhosed pattern) and suppress material properties (flexibility). 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 using a foamable reaction mixture as a core material, for example, a synthetic resin raw material such as polyurethane resin, the formation of the foam involves a chemical reaction that is greatly affected by various factors such as temperature, so it is necessary to set uniform conditions and to some extent. It has been desired to develop a manufacturing method that can cope with temperature changes. In addition, it is known that the conventional manufacturing method involves simply interposing an embossing machine between an uncoiler and a molding machine to perform embossing. Many of them 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 was long. In addition, since sandwich boards were conventionally produced with one strip, the productivity was half that of producing two strips at the same time.

In order to eliminate these drawbacks, the present invention prevents cracks, peeling, splitting, and scratches that occur in the coating film during embossing by heating a coiled metal hoop material and then embossing it. , and after releasing the residual strain during embossing, it is greatly curved inward and reversed, and then the metal hoop material is formed into a predetermined shape with two gutter grooves and a male and female connecting part, and this is approximately The plastic foam raw material is heated to 30 to 110°C, and then the plastic foam material is discharged and a face material is laminated thereon, and this is sent to a curing oven to continuously manufacture sandwich plate strips with a predetermined cross-sectional structure. We proposed a method for manufacturing sand inch boards in which the metal hoop is cut to a regular length, and then the central part of the metal hoop is cut parallel to the longitudinal direction to make two sand inch boards, and each end is formed. It is something to do.

EMBODIMENT OF THE INVENTION Below, the manufacturing method of the sand inch board based on this invention is demonstrated in detail using drawings. FIG. 1 is a schematic configuration diagram showing an example of an apparatus used for carrying out the above method, in which the pedestal is made into a two-story structure, and metal hoops are attached to the second and first floors of the structure through mechanisms corresponding to each process. A (hereinafter simply referred to as coil)
is configured so that it is reversed along a U-shaped trajectory. 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 feeds the coil A to the loop portion 4 at a predetermined speed. The loop portion 4 controls the supply state of the coil A when embossing the coil A, and also functions as a relief portion to prevent a large force from being suddenly applied to the coil. The worker guides and feeds the coil A fed from the loop portion 4 to the heater 6 using a guide roller, and when the coil A is pinched by the second pinch roller 7, the upper roller 5a separates from the coil A. Lower roller 5 being driven
b functions as a guide. In addition, the heater 6 has a coil A
The decorative paint film and the steel plate are heated to approximately 30 to 60°C to soften the baked decorative paint film and prevent the decorative paint film from peeling off from the steel plate or causing cracks, scratches, or cracks during embossing. It is meant to be. The heating method is one of hot air method, direct flame method, and hot wire method. Reference numeral 7 denotes a third vinyl roller "tT" which feeds the coil A to the embossing roll 8 at a predetermined speed and also functions as a brake against the movement of the coil A during embossing.
The pinch roller 7 is installed as necessary. The main embossing roll has a pattern consisting of male and female uneven parts formed on its outer peripheral surface, and the upper and lower rolls 8a and 8b are engaged to form a desired pattern on the coil A as shown in Figure 2. The gap between the upper and lower rolls 8a and 8b is determined by the height of the uneven portion and the thickness of the coil. The process is to correct the residual strain that exists in the coil A that has been embossed with a leveler. As extracted and shown in FIG. 3, upper and lower rollers 9a1.9a2.9aa, . . .
9an (shown up to 9aa in the diagram), lower roller 9b+
, 9b2.9b3,...9bn (9b in the figure)
4) are arranged in a zigzag pattern in the vertical direction, and can be adjusted between the upper rollers. 10 is the fourth pinch roller, which rotates faster than the main embossing roll.
The coil A is passed through a process including an embossing roll 8 and a leveler in a stretched state.

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 first is a reversing machine to feed the coil A from the second floor to each process on the first floor, and to turn the front side of the coil A into the back side.
3. It consists of a curved guide plate 13a, and the guide rollers can be brought into contact with each other and separated from each other by means of a not-shown switch notch. The curved guide plate 13a is a flat plate with guide pieces 13b provided 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 molding machine 13a and the molding machine 15 is designed to function as a loop.

The molding machine 15 is used to mold the coil A into a double width (not shown), as shown in FIG. 4, for example.

That is, a protruding strip a is formed in the center of the coil A in parallel to the longitudinal direction, and gutter-like portions filled with the foamable mixture P serving as the core material are formed on both sides of the protruding strip a, and at both ends on the outside in the longitudinal direction. A female connecting portion C is formed on the edge. 16 is a preheater that heats the coil A to 50 to 90°C, 17 is a guide roller, and 18 is a conveyance roller. 1
9 is a discharge part where a foamable reaction mixture P having self-adhesive properties is
(hereinafter referred to as the mixture) on the back side (one side) of coil A.
For example, it is intended to be supplied by any one of a discharge method equipped with a rotary blade, a spray gun method (air, airless), or an injection method. Note that as the mixture P, a thermosetting foamable synthetic resin is used.

Reference numeral 20 denotes a backing material supply unit in which backing material B, such as one or more of metal foil, asbestos paper, kraft paper, aluminum foil, plastic sheet, asphalt felt, etc., is laminated on mixture P. For example, it is composed of an uncoiler (not shown), 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 also determines the timing for bringing the backing material B into contact with the mixture P depending on the state of the mixture P.
It has the function of making more effective use of the so-called self-adhesive property of the mixture) and of leveling out the uneven dispersion of the mixture P. Its configuration includes one roller ([!it, or multiple rollers in a nip roll method, or a ship (not shown). Also, a detector 22 detects cutting, damage, etc. of the backing material B. Accordingly, a signal is generated to stop the operation of the discharge section 19.The principle is that electricity, magnetism, heat,
This is a detector that uses tension difference. 25 is a mold that transports 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 sand inch plate S of a predetermined thickness. be. To be more specific, it is composed of a drive wheel group 26, a driven wheel group 27, which serve as upper and lower mold members, a heating device 28, and a cover 29 that surrounds the space containing the entire mold material. To explain further, as shown in FIG.
A pulley or gear 26b is fixed to the other end of the drive wheel 26, and this is rotated by a motor (not shown) via a belt, chain, or gear. It is something that transmits. The heating device 28 is used to keep the inside of the mold at a temperature of 30 to 110°C, to complete the reaction of the mixture P within a predetermined time, and to exhibit predetermined physical properties.

In addition, the cover 29 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 have a structure that prevents leakage of gas within the mold 25 to the maximum extent possible. 30 is a running cutter that cuts the sand inch plate strip to a fixed length, and is either a rotary blade or a push-cut blade. Reference numeral 31 independently feeds two sandwich plates S cut into regular lengths to a secondary forming machine 32 at a speed that is faster than the speed of the composite plate S moving in the mold by a conveyance roller, so that it can be taken over. It is something. 2
The next forming machine 32 cuts the convex strip a of the sandwich plate S', which has two regular lengths (double width), into two parts as shown in FIG. This is for manufacturing a completed sandwich plate S as shown in FIG. 8 by shaping as shown in a) and (b) when two spaces are opened.

Next, the 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 through the loop portion 4 to the second pinch row i, and is fed to the heater 6. Note that the second pinch roller functions as a pinch roller only when the coil A first reaches the third pinch roller 7, 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 roll 1 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 cracks, shrinkage, etc. occur. 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.
If the heating temperature is 60°C or higher, the resin content of the decorative coating will approach its softening point, and the adhesive strength between the coil A and the decorative coating will decrease, causing the decorative coating to peel off from the coil A. This is because there is a risk of shrinkage or lack of 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 its hardness, which may cause the decorative coating to crack or significantly reduce its scratch resistance. Next, the coil A that left the heater 6 is the third one.
The embossing roll is mainly fed by the rotation of the pinch roller 7, and the embossing roll
As shown in the figure, an embossed pattern consisting of concave portions α and convex portions β is continuously formed. The coil A that has left the main embossing roll is corrected by a leveler to remove any residual strain during embossing while being stretched by the fourth pinch roller 10, and then sent to the reversing till. Coil A that has passed through reversing machine U is sent to leveler sensor 14
The coil A is fed to a molding machine 15 through a certain space, and the coil A is formed into the cross-sectional shape shown in FIG. 4, and then fed to a preheater 16. In the preheater 16, the coil A is approximately 30 to 110
℃ and fed to the entrance of the mold 25 via guide rollers 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, for example cream thyme-gel thyme-
As the rise time changes, sand inch plates S having a shape as shown in FIG. 5 are continuously sent out from the outlet 25b. Next, this is cut into regular lengths with a traveling cutter 30, and the cut sandwich plates S' are transferred to a continuous sandwich plate band S and a single-length sandwich plate S via a conveyance roller 31.
A space is formed between them due to the speed difference, and then the sandwich plate S' is fed to the secondary forming machine 32, and after passing through the steps of FIGS. 6, 7(a), and (bl), the sandwich plate S' is Two sandwich plates as shown in the figure are manufactured at the same time.

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. 9 and 10. That is, the ninth
The figure shows a method of manufacturing a sandwich board by forming a protruding strip a into a rectangular shape, and Fig. 10 shows a method of manufacturing a sandwich board by forming a female connecting part C and using this as the center of the coil. .

Furthermore, as shown in FIG. 11 fa) and (bl), the driving and driven wheels 26 and 27 that serve as mold forming materials can be formed as shown in the figure.Also, although not shown, the mold 25 can be It is also possible to have a structure consisting of

As described above, according to the method for manufacturing a sandwich board according to the present invention, (1) 30 to 6 coils having a decorative coating film on the surface are formed.
Because it was heated to 0°C, any uneven pattern can be embossed on the decorative coating without causing any cranking, scratching, 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 it through a rehrader under tension.
Pekokki can't be twisted. ■The decorative coating does not crack or peel during embossing, so it has excellent weather resistance, scratch resistance, and chemical resistance. ■Since the coil is reversed along a U-shaped trajectory from embossing to molding, there is no unreasonable bending of the coil and smooth communication between each process. (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. ■Can produce twice as many sand inch boards in one production process. [Phase] Even if the sandwich plate has a complicated shape, the mixture is sandwiched between the coil and backing material through a mold made of rollers similar to a molding machine, so it can be manufactured smoothly without touching the decorative surface of the coil. can. ■The process is easy as the wide strip is cut to a regular length and then cut into two lengthwise strips. It has the following characteristics.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing an example of an apparatus for carrying out the method for manufacturing a sandwich board according to the present invention, and FIG. 2 is a perspective view showing an example of an uneven pattern formed by embossing.
Fig. 3 is a perspective view showing the rehera, Fig. 4 is a vertical view showing an example of forming a metal hoop material, Fig. 5 is an explanatory view showing a longitudinal section midway through the curing oven, and Fig. 6 is the secondary forming machine. Figure 7 (al, (bl) is an explanatory diagram showing the process of cutting the protruding strips of the metal hoop material into two strips and forming them. Perspective views showing sand inch plates, Fig. 9, Fig. 10, Fig. 11 (a), (
b) is an explanatory diagram showing another embodiment. 1... Frame, 6... Heater, 8I... Emboss roll, U... Reshape, ■... Reversing machine, 15... Molding machine, 16... Fluorescent heater, 19... Discharge section , 25・
...Mold, 29...Cover, 3o...Travelling cutter, 3
2...Secondary molding machine.

Claims (1)

[Claims] (1) 30 to 60 pieces of metal hoop material wound into a coil shape
After heating to ℃, it is embossed, then the distortion of the metal sheet is corrected, it is greatly curved inward and then turned over, and then it is fed to a forming machine and the center part of the metal hoop is aligned parallel to the longitudinal direction. In addition to forming a protruding strip, either male or female connecting portions are formed on both side edges in parallel to the longitudinal direction to provide two gutter-like portions, and the metal hoop material on which the gutter-like portions are formed has a thickness of 30 to 110 mm. ℃, and then discharges the reacting and foaming plastic foam raw material onto the back surface of the metal hoop material. After placing the back material on top of this, the raw material is fed into a mold consisting of upper and lower mold members. The metal hoop material and the backing material are reacted and foamed to form a plastic foam, and then the sandwich board with the plastic foam filled between the metal hoop material and the backing material is cut into a predetermined length with a traveling cutter, and then the The central part of the convex strip is cut parallel to the longitudinal direction to divide it into two forming pieces for a male type connection, and the forming piece is bent inward in an L-shape from the middle to form a male type connection part. A method for manufacturing a sandwich board characterized by: