JPH01299641A - Structure having multiple surface and its production - Google Patents

Abstract

PURPOSE:To enable production of a large amt. of structure having multiple surfaces, high rigidity and resistance by folding a sheet material to a doubly folded shell structure and forming the multiple surface structure three- dimensionally by superposing many number of said doubly folded shell while bonding the edge lines to each other. CONSTITUTION:For example, zig-zag folds are provided to a sheet material comprising such as metal or other optional material. Solid line parts in the drawing correspond to edge line parts of crests of an assembled multiple surface structure, and dotted line parts correspond to bottom lines of troughs. A multiple surface structure is obtd. if the sheet material is folded and bonded along the edge lines and the bottom lines in this state. Structures having different surface and surface area may be obtd. if the depth of the folds, i.e. degrees of the difference between the crests and the bottoms are varied depending on a purpose in a stage of laminating folded sheets. Obtd. structure may be applied to a material for catalyst, heat exchanger, filter for fluid, etc.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a multi-surface area structure formed three-dimensionally by stacking sheet materials in a double-folded shell structure with their ridgelines joined to each other, and a method for manufacturing the same. It is something.

[Prior Art] In the case of catalysts, etc., it has been conventionally desired to further increase the contact area of parts involved in fluids in equipment for catalysts, heat exchange, ion exchange, P-passage of fluids, etc. The amount of chemical reaction is controlled by the surface area of the catalyst support, and in filters and ion exchangers, the flow rate of the fluid processed under the same pressure conditions is controlled by the surface area of the filter. Therefore, it has become an important technical issue how to increase the contact area of the portion that comes into contact with the fluid to increase the processing effect of the above-mentioned devices and the like.

Conventional methods to solve this problem include linearly bending the material in the parts that come into contact with the fluid, such as creating a single-fold structure like the air cleaner part of a car engine, or creating a structure in which fine capillaries are bundled. In this way, the surface area of the part that comes into contact with the fluid is expanded.

[Problems to be solved by the invention] However, conventionally, the manufacturing process for manufacturing such a multi-surface area structure is complicated, so it is often not possible to realize it from a cost standpoint, and the internal fluid during operation is In reality, problems such as insufficient structural strength and rigidity to withstand the pressures remain, making it impossible to achieve this goal.

Therefore, there is a need for the development of a multi-surface area structure suitable for mass production and a method for manufacturing the same.

[Means for solving the problem] In order to make the sheet material into a double-folded shell structure, the present invention forms a three-dimensional multi-surface-area structure in which the ridge lines of each single piece are overlapped and bonded to each other. Therefore, it is an object of the present invention to provide a manufacturing method that enables a multi-surface area structure with high rigidity and durability that could not be realized with a single-folded shell structure according to the prior art, and that is suitable for mass production.

[Operation Figure 1 shows the planar unfolding pattern of the sheet material for forming the double-folded shell structure according to the present invention.As shown in the figure, each sheet material (which may be made of metal or other material) is provided with, for example, a zigzag pattern. The solid lines shown in the figure correspond to the ridge lines of the mountains when assembled, and the dotted lines correspond to the valley lines.

In this way, by bending and joining the mu and valley lines of each sheet, a multi-surface area structure can be formed. The reason for this is that in the double-folded shell structure of the present invention, there is only one degree of freedom in changing the shape of the entire structure as long as the deformation other than the bending line is slight. 11 joined along! The body only has one degree of freedom.

Therefore, by adjusting the double bending angle of the structure in the theoretical range of 0 to 180 degrees along the direction of the above-mentioned degrees of freedom, a multi-surface area structure in which the surface area increases depending on the degree of elongation of the bonded bent portions can be obtained. A body can be formed.

[Example] Next, an example of the double-folded shell structure according to the present invention will be described with reference to the drawings.

FIG. 2 shows the appearance of an assembled multi-surface area structure in one embodiment, i.e., the first
The structure shown in Fig. 2 is formed by stacking the sheet materials shown in the figure, bending them by some means to form peaks and valleys, and then, for example, joining the ridges together and then expanding them. . In the process of stacking layers, structures with different surface areas can be formed depending on the purpose, depending on the depth of the creases, that is, the degree of the difference between the peaks and valleys, and the fluid processing functions will also differ.

In other words, when assembling the multi-surface area structure shown in Figure 2, force is applied from the left side of the figure to crush the structure.
In this way, by adjusting the degree of bending of the peaks and valleys, a multi-surface area structure with different fluid processing functions is created.

For example, a structure with a large surface area (like a collapsed structure) can be created by strongly bending, whereas a structure with a relatively small surface area can be created by weakening the degree of bending.

Note that FIG. 2 shows a multi-surface area structure in which the first to fourth layers are laminated.

FIG. 3 shows another embodiment of forming a double-folded shell structure. In FIG. When joined, a multi-surface area structure of another cylindrical structure can be formed.

FIG. 4 shows a basic principle diagram of the manufacturing process for manufacturing the structure shown in FIG. 2.

In the figure, 1 is the sheet material, 2 is the printing process of the folded part,
3 indicates the overlapping process, 4 indicates the bonding process, 5 indicates the structure expansion process, and 6 indicates the product (multi-surface area structure).

In this case, a pattern as shown in FIG. 1 is printed on a sheet material in a printing process 2, superposed in an overlapping process 3, bonded in a bonding process 4, and formed into a multi-surface structure in an expansion process 5. The original shape is expanded and bent to form a product 6 as a structure.

FIG. 5 shows a specific example of a manufacturing process for manufacturing a multi-surface area structure according to the present invention. In the same figure, 10-1.
10-2.10-3...10-i is a sheet material on which a crease pattern is printed, 11 is a tension control section for aligning the pattern of the sheet material, 12 is an overlapping section, 1
3 is an overlapping position detection part, 14 is a joint part, 15 is an air pressure chamber for adjusting the air pressure, 16, 17, 18 is a pair of rollers, 19
2 shows an expansion section that performs bending while expanding a space other than the joined and fixed ridgeline (allowing licking with one degree of freedom), 20 an air pressure control section, and 21 a finished state detection section.

Each sheet material 10-1.1 fed out from each winding roll
0-2. ...10-1, each pattern is aligned in the tension control section 11, and then the overlapping section 1
A slight deviation at the 0 overlap position where the overlap is performed in step 2 is detected by the overlap position detection unit 13, and is sent to the tension control unit 11 via the line j, where the deviation is corrected and
The ridgeline portions are joined. As many as desired 'f? The original form of the structure in which the ridges are layered and the ridgeline parts are joined is the expansion part 19.
The space other than the joined and fixed ridgeline portions is expanded to create a continuous multi-surface area structure. In addition, the degree of deviation of the joint points in the structure as a finished product, or the slight deviation of the overlapping state, is constantly caused by the line jzρ.
3 to the tension control section 11 and the air pressure control section 20 for the expansion section (from the detection section 21).

FIG. 6 shows an example of setting the sheet materials having a zigzag pattern as shown in FIG. Set it so that it comes to each position and join the ridge lines.

FIG. 7 shows a stacked state of sheet materials having the respective patterns shown in FIG. 6, viewed from a cross-sectional direction.

Figure 8 shows an example of a zigzag pattern printed on a sheet material. For each sheet material, the location of the alignment mark M is shifted and control is performed so that the position corresponding to the ridgeline of the mountain is at the appropriate position. It is done.

When using electric heating material, a loop current is passed through the zigzag wire section to join. In addition, in the P part, the width of the conductor is widened in the diagonally shaded part, which indicates the perforated part, so that even when the loop current flowing through the zigzag part flows through that part, the current will spread, so that it will not be welded. I have to. The perforated portion is provided for cutting off unnecessary parts of the final product in the embodiment described later.

FIG. 9 shows an embodiment in which a current is applied to the core coil using a high frequency source HP, and the ridgeline portion of the sheet material is welded by applying pressure while moving the frame portion up and down.

In Figure 10, a bonding medium that dissolves between the laminated sheet materials is placed on the ridgeline to be bonded, and a gas-generating medium is placed in between and compressed (or heated) to weld and form a multi-surface area structure. Another example is shown below.

In other words, in the same figure, the bonding medium and the gas generating medium are sandwiched together as shown in (a), pressure is applied as shown in (b), the bonding medium is melted and the sheets are bonded together, and gas is generated by heating. The medium is gasified, and as in (c) gas is generated to expand and bend the original shape of the multi-surface area structure, and (d) the original shape of the multi-surface area structure is then folded.

Figure 11 shows the specific expansion method of the expansion process in the manufacturing process shown in Figure 5.The original shape of the overlapping and joined multi-surface area structure has a stepped shape with deviated and joined ridge lines. Since it is a sheet layer, as shown in the figure, compressed air is sent into the hole in the cut surface from a plurality of injection ports to expand it and form a multi-surface area structure.

FIG. 12 shows the roller pair 17 in the manufacturing process of FIG.
An example will be shown in which a roller is charged alternately with positive and negative electrodes in a zigzag pattern to expand the sheet material using the mutual electrical repulsion force to form a multi-surface area structure along the bending line.

FIG. 13 shows another embodiment in which smooth expansion is performed by applying ultrasonic waves or mechanical vibrations to the expansion section at the beginning of the expansion process.

Ultrasonic waves are applied from an ultrasonic transducer T to the original shape of the adhesive multi-surface area structure sent out from the roller along the guide G to cause it to expand. In addition, when applying R mechanical vibration, effective expansion can be achieved by applying a vibration frequency that is approximately an integral multiple of the natural frequency of the microscopic surface surrounded by the bending line.

Figure 14 shows a protective film (membrane) on both sides of the sheet material.
This example shows an example in which the parts are sandwiched and seamed using seam welding devices S and S2, then joined, and expanded by cutting the edges with a rotary cutter R or the like before the expansion part. It is suitable for forming multi-surface area structures of ultra-thin films, or for manufacturing the above-mentioned structures from sheet materials having shape memory, such as elastic sheet materials.

Figure 15(^)(B) shows how the multi-surface area structure produced as described above is closed at both ends to form the final finished product.The structure in Figure 4 is considerably crushed. If you look at the cut surface on the left in a state like that (18C deformation), you will see that the 15th (A
) It is formed in the shape shown in the figure. Therefore, communicating holes p, , Pz, PJ are located at the center of each grid-like opening.
It is completed by gluing the end face member EM that looks like this.

Note that when the multi-surface area structure of the present invention is used as a filter, communication holes are formed in every other row. That is, 274 rows of communication holes before and after rows P and P, and PJ
Columns p and p2 may be omitted.

FIG. 16 shows a catalyst device constructed by using four units of the multi-surface area structure of FIG. 4, which was completed and formed as shown in FIG. 15, v,, v,, V,, v.

indicates the structure, EM is an end face member having a communication hole, and SP is a spacer through which fluid (gas, etc.) entering from the left exits to the right.

Figure 17 shows an application example in which eight units of the multi-surface area structure according to the present invention are used to provide a pump function. A pumping action can be performed by applying pulsating pressure to the pump.

Effect E] As described above, in the present invention, each sheet material has a double-folded shell structure and the ridges are joined to create a laminated structure, so the manufacturing process is relatively simple and mass production is possible. It's easy to do.

Other features and advantages of the multi-surface area structure of the present invention are as follows.

[Since the surfaces of different sheet materials are aligned on the same plane through a single joint, a structure with extremely high overall structural strength and rigidity can be achieved, increasing the limit of destruction due to external impact or fluid pressure. becomes possible.

[2] The partial planes that make up the double-folded shell can be made fine in proportion to the pitch of the folds, and since these partial planes are surrounded by highly rigid bending lines, they do not bend easily. Since the amount is small, the distance between the opposing partial planes can be minimized, and the overall volume can be reduced.

Specifically, when the short side is a and the long side is b, an approximate calculation is made using the deflection amount and stress of a rectangular partial plane, and the results are as follows.

Maximum deflection - 1a x maximum stress 5na when a rectangular plate with simple peripheral support receives distributed load P based on minute deflection theory
x is given by the following equations (1) and (2).

Wnax=^IPa”/ (Eh”) −(1) Sl
ax=BIPa”/(h”)=---(2) In the above formula, E is the elastic modulus of the plate, h is the plate thickness, ^1, B1 is (b/a
) is the coefficient determined by

From the above equation, it can be seen that the respective ratios of the deflection and stress of the plate under the two conditions where only b is different can be simply expressed as the ratio of ^1 and the ratio of B1. It is known that the above coefficient is the following numerical value (Mechanical Engineering Handbook, 5th edition, Japan Society of Mechanical Engineers [4
- see page 67.68).

Therefore, in this case, the expansion values of deflection and stress occurring in a 4:1 rectangle are 3 times and 2.5 times, respectively, compared to those of a square, and without considering the above [2], It can be seen that there is a large difference even just by comparing the deflection and stress. (Furthermore, when the b/a ratio is large, the difference tends to increase.) [3] When the laminated double-folded shell structure is compressed as the bending angle of each part approaches 180 degrees, the terminal part Since it is connected to the internal space through a communication hole such as a diamond shape which is larger than the actual area of the fluid passage, terminal processing for connection to an external device is extremely easy.

[4] When the mechanical restraint conditions at the ends of the elliptical structure are weak, it can be freely deformed according to the degree of freedom of deformation determined by the structure, and this allows control of the internal volume of the internal space, that is, the internal fluid Can inhale and exhale. Therefore, by using an appropriate drive means, check valve means, etc., it is theoretically possible to construct an apparatus that also has a fluid pressure feeding function without any leakage path.

[Brief explanation of the drawing]

FIG. 1 shows a planar unfolding pattern for forming a double-folded shell structure from a flat sheet stock, FIG. 2 shows an assembled embodiment of a multi-surface area structure according to the invention, and FIG. 3 shows another embodiment. FIG. 4 is a block diagram of the basic manufacturing process for manufacturing a multi-surface area structure according to the present invention, FIG. 5 is a block diagram of the specific manufacturing process 11 shown in FIG. 4, and FIG. A diagram showing the positional relationship of a zigzag pattern to be bent on a sheet material, Figure 7 is an explanatory diagram of the cross-sectional direction of Figure 6, Figure 8 is an example of a joining means by thermal welding, and Figure 9 is a diagram using a high frequency source. Figure 10 shows an example in which high-pressure gas is generated to expand each sheet material after joining, Figure 11 shows an example of another expansion method, and Figure 12 shows expansion due to charging. Example of the method, FIG. 13 is an example of the expansion method using ultrasonic waves, FIG. 14 is another example of manufacturing a multi-surface area structure with an ultra-thin film, etc., and FIG. 15 (^) (B
) The figure shows an example of closing the structure of the present invention with an end member, the first
FIG. 6 shows an embodiment of a catalyst device constructed using four units of the structure of the present invention, and FIG. 17 shows an embodiment of a pump mechanism constructed using eight units of the structure of the present invention. In the figure, (1) is the sheet material, (2) is the folding pattern printing process, (3) is the overlapping process, (4) is the bonding process, (5) is the expansion process, and (6) is the multi-surface area of the product. structure, respectively. Figure 3 Figure 4 Figure 5 Figure 11 Figure 12 Figure 14 Figure 15 Figure 17

Claims (1)

[Claims] 1) Layering a plurality of sheet materials to be folded along a predetermined double fold line and joining them at least partially along the ridgeline of each sheet material except for the topmost sheet material. and set the degree of freedom of shape change to one,
A multi-surface area structure having a double-folded shell structure, characterized in that it is formed by expanding free space other than the joined and fixed ridgeline portions. 2) A multi-surface area structure according to claim 1, wherein the double fold lines are in a zigzag pattern. 3) When a plurality of sheet materials prepared in advance are overlapped at a predetermined position and folded except for the uppermost sheet material, at least each line portion corresponding to the ridgeline is joined via a joining means, and then joined. 1. A method for manufacturing a multi-surface area structure, which comprises expanding a free space other than that fixed by an expansion means to continuously form a multi-surface area structure having a double-folded shell structure. 4) The manufacturing method according to claim 3, wherein each of the plurality of sheet materials prepared in advance is printed with a predetermined zigzag pattern except for the uppermost sheet material. Manufacturing method. 5) In the manufacturing method according to claim 3, an annular circuit of an electric heating body is formed on the sheet material at the ridge line to be bent and a wide line portion that short-circuits the ridge line, and the ring circuit is formed in the electromagnetic field applied from the outside. thereby inducing a loop current,
A manufacturing method characterized by thermally welding each sheet material along the ridge line by the heat generation effect of the electric current. 6) In the manufacturing method of claim 3, on each stacked sheet material, a bonding agent is placed along the ridge line to be bent, and a gas generating agent is placed in the remaining space, and then compressed. The above-mentioned manufacturing method is characterized in that after bonding each ridge line portion with the bonding agent, the multi-surface area structure is expanded by gas generation by compression to form a multi-surface area structure having a double-folded shell structure.