JPH106416A - Production of honeycomb core - Google Patents

Abstract

PROBLEM TO BE SOLVED: To apply sufficient pressure required for adhesion to enhance bonding strength to a large extent, making even material quality softened at the curing temp. of an adhesive or lower usable as a matrix, to simply and easily realize these characteristics and to shorten the heating curing time of an adhesive. SOLUTION: In the production of a honeycomb core, a matrix 6 is molded into a corrugated plate 2 and a plurality of the corrugated plates 2 are stacked through an adhesive 3 in positional relation wherein spaces A are present and bottom parts and top parts are matched with each other. Piece members 9 are inserted into the spaces A between the corrugated plates 2 and the whole is heated at the curing temp. of the adhesive 3 to be pressed to bond the corrugated plates to obtain a honeycomb core 1 having the corrugated plates 2 as cell walls and the spaces A as cells. It is considered that a current supply heating elements 10 is inserted in each piece member 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a method for manufacturing a honeycomb core. That is, the present invention relates to a method for manufacturing a honeycomb core by a so-called corrugation method, in which a honeycomb core is obtained by stacking and bonding corrugated sheets.

[0002]

2. Description of the Related Art A honeycomb core is generally manufactured by the following steps. That is, first, after the base material is formed into a corrugated sheet, such a plurality of corrugated sheets are stacked while interposing an adhesive in a positional relationship where the bottom and the top are aligned, and then the curing temperature of the adhesive is set. By heating and pressurizing, the corrugated plates are bonded to each other, thereby obtaining a honeycomb core, which is a planar aggregate of hollow columnar cells partitioned and formed with each corrugated plate as a cell wall.

[0003]

The following problems have been pointed out in such a conventional example. That is, in the manufacturing process of the honeycomb core, as described above, after corrugated sheets are stacked with an adhesive interposed therebetween, the corrugated sheets are bonded by heating and pressing. FIGS. 3A and 3B are perspective views for explaining such a conventional example, in which FIG. 1A shows a stacked corrugated sheet, FIG. 2B shows its collapsed state, and FIG. FIG. 4D shows the honeycomb core that has been broken.

[0004] First, in the method of manufacturing a honeycomb core 1 of this kind in the related art, as shown in FIG. 3A, the adhesive 3 is attached to the corrugated plate 2 so that the bottom and top are aligned. Were stacked and interposed between them, and in a state where there was a hollow space A therebetween, pressure was applied along the stacking direction (from above and below in the drawing) while heating for bonding. Then, since the space A was present, a necessary and sufficient pressure for bonding could not be applied, and only an insufficient weak pressure could be applied for bonding. If too much pressure is applied, the piled corrugated sheet 2 is crushed from the state shown in FIG. 3A to the state shown in FIG. It has been pointed out that the cell 5 formed with the plate 2 as the cell wall 4 (see FIG. 3 (3) and FIG. 4 (4)) may be crushed. Second,
In the conventional method of manufacturing the honeycomb core 1 of this type, it was not possible to apply a necessary and sufficient pressure for bonding between the corrugated sheets 2. That is, anxiety is often pointed out about the adhesive strength between the cell walls 4, and a problem may occur in the compressive strength and the shear strength.

Thirdly, in the method of manufacturing the honeycomb core 1 of this type in the related art, as a base material of the corrugated plate 2, that is, the cell wall 4,
Materials that soften below the curing temperature of the adhesive 3 have been considered unusable. That is, if a base material that softens below the curing temperature (for example, 170 ° C.) of the adhesive 3, such as plastic or fiber-reinforced plastic, is used, the bonding by heating and pressurization at the curing temperature of the adhesive 3 is performed. The base material softens. Then, by applying pressure in the stacking direction, for example, from above and below, the stacked stack of corrugated sheets 2 and the cell walls 4 and cells 5 are moved from the state shown in FIG. (2) It has been pointed out that a problem such as crushing as shown in FIG. 3 or collapse of the entire shape from the state shown in FIG. 3 (3) as shown in FIG. 3 (4) is obtained. Conventionally, when a resin or the like is used as a base material, a material that softens at a temperature equal to or higher than the curing temperature of the adhesive 3 (for example, about 240 ° C.) is selectively used, and the material of the base material is limited. was there. The honeycomb core 1 in which a flat plate is further interposed, stacked, and bonded between the corrugated plates 2 has been developed and used, but the manufacturing method thereof is also described in the first, second, and third embodiments. The problem according to was pointed out.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has been made to solve the above-mentioned problems of the prior art. In the case of bonding by pressing, the top member is inserted into the space, so that firstly enough pressure necessary for bonding can be applied, and secondly, bonding strength is greatly improved. Thirdly, it is possible to use a material which softens below the curing temperature of the adhesive as described in claim 4, and fourthly, it is possible to realize these easily and easily. The purpose is to propose. A third object of the present invention is to provide a method of manufacturing a honeycomb core, in which a heating member is provided inside a frame member to shorten the time required for heating and curing the adhesive. .

[0007]

The technical means of the present invention for solving such a problem is as follows. Claim 1
Is as follows. That is, in the method for manufacturing a honeycomb core according to claim 1, first, the base material is formed into a corrugated sheet in which corrugations are continuously bent by a corrugating apparatus, and then a plurality of corrugated sheets are formed. Then, they are sequentially shifted by a half pitch of the waveform, and are stacked while interposing an adhesive in a positional relationship where the bottom and the top are aligned. At the same time, a top member having a sectional shape corresponding to the sectional shape of the space is densely inserted into the space formed between the corrugated sheets, and then heated and pressed at the curing temperature of the adhesive. Thereby, the corrugated sheets are adhered to each other, so that each corrugated sheet is used as a cell wall and each space is used as a cell, and a planar aggregate of hollow columnar cells partitioned by the cell walls is used. To obtain a honeycomb core.

Next, claim 2 is as follows. That is, in the method for manufacturing a honeycomb core according to claim 2,
First, after the base material is formed into a corrugated sheet in which corrugations are continuously bent by a corrugating apparatus, a plurality of corrugated sheets and a flat plate are interposed with an adhesive. At the same time, the corrugated sheets are sequentially shifted by a half pitch of the waveform, and are arranged in a positional relationship such that the bottom and the top face each other. And, in the space formed between each of the corrugated sheet and the flat plate,
After densely inserting a top member having a cross-sectional shape corresponding to the cross-sectional shape of the space, by heating and pressing at the curing temperature of the adhesive, each corrugated plate and the flat plate are bonded, Each corrugated plate and flat plate is used as a cell wall, and each space is used as a cell, to obtain a honeycomb core formed of a planar aggregate of hollow columnar cells defined by each cell wall. .

Next, claim 3 is as follows. That is, in the method for manufacturing a honeycomb core according to the third aspect,
3. The method for manufacturing a honeycomb core according to claim 1, wherein an electric heating element is provided inside the top member. Claim 4 is as follows. That is, in the method for manufacturing a honeycomb core according to claim 4, in the method for manufacturing a honeycomb core according to claim 1 or 2,
The base material is made of a material that softens below the curing temperature of the adhesive.

As described above, in this method for manufacturing a honeycomb core, first, a base material is formed into a corrugated sheet, and then a plurality of such corrugated sheets are placed in such a manner that a space exists and a bottom portion and a top portion are aligned. The stacking was performed with the adhesive interposed, and then each corrugated sheet was adhered by heating and pressing at the curing temperature of the adhesive, so that each corrugated sheet was a cell wall and each space was a cell. A honeycomb core is obtained. Then, upon bonding by heating and pressing as described above between the stacked corrugated sheets,
The top member is inserted into the space between the corrugated sheets to support each corrugated sheet. In the second aspect, a flat plate is further interposed, stacked, and bonded between the corrugated sheets, so that each corrugated sheet and the flat plate form each space, cell wall, cell, and the like. . According to a third aspect of the present invention, a current-carrying heating element is provided inside the top member, and upon bonding, each corrugated plate is heated also from the top member side of the internal space. Further, in the fourth aspect, the material which is softened at the curing temperature of the adhesive,
It is designed to be used as a base material.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments of the invention shown in the drawings. 1 and 2 are perspective views for explaining an embodiment of the present invention. FIG. 1 (1) shows a main part of the first example, and FIG. 1 (2) shows a frame in the first example. FIG. 3C shows a main part of the second example, and FIG. 4D shows a top member in the second example. FIG. 2A shows the top member in the third example,
(2) The figure shows the top member in the fourth example. FIG. 4 is an explanatory front view for explaining a general method for manufacturing a honeycomb core. FIG. 4A is a diagram illustrating a prepared base material, FIG. (4)
The figure shows the process of stacking and joining corrugated sheets. FIG. 5 is an explanatory front view of a honeycomb core, and FIG.
(2) The figure shows another example.

First, referring to FIG. 4, the honeycomb core 1 of the present invention
A description will be given of a general example (general corrugation method) which is a premise of the method of manufacturing. In this manufacturing method, first, FIG.
As shown in FIG. 1A, a base material 6 is prepared. As the base material 6, an aluminum foil or other metal foil, a fiber reinforced plastic (FRP) sheet, various plastic sheets, a composite sheet containing pulp, and sheets of other various materials are used. In addition, fiber reinforced plastic (F
RP) sheet is made of glass fiber, Kevlar fiber, carbon fiber, ceramic fiber, metal fiber, resin fiber, other woven or non-woven fiber, epoxy resin, polyimide resin, other thermosetting resin, A thermoplastic resin is appropriately selected and combined by adhesion, impregnation, mixing or the like. And this fiber reinforced plastic sheet is used as a semi-cured state that is not yet completely cured, that is, a prepreg having flexibility and viscosity.
A material obtained by adhering, impregnating, or mixing an epoxy resin to a plain-woven carbon fiber is used as the base material 6, and its glass transition point is about 120 ° C.

Next, in this manufacturing method, as shown in FIG. 4 (2), such a base material 6 is corrugated by a corrugating apparatus 7 so that the corrugated irregularities are continuously bent. Formed into plate 2. More specifically, the corrugating device 7 is composed of a pair of upper and lower racks 8 in the example shown in FIG. 4B, but may also use other gears, press devices, belt-type dies, and the like. The base material 6 can be inserted into such a corrugating device 7 and sandwiched from both front and back sides and heated and pressed to form corrugated irregularities as shown in FIG. Is formed into a corrugated sheet 2 which is continuously bent. The corrugated sheet 2 has a trapezoidal shape as shown,
The substantially triangular, substantially quadrangular, and other various shapes of corrugations are straight and parallel in the short direction and continuously in the long direction.
It is bent at a predetermined pitch and height.

Thereafter, in this manufacturing method, FIG.
As shown in the figure, a plurality of corrugated sheets 2 formed in this manner are successively shifted by a half pitch of the waveform, and are stacked with an adhesive 3 interposed therebetween in a positional relationship where the bottom and top are aligned. .
More specifically, the corrugated sheet 2 formed as described above is coated with a node bond, that is, an adhesive 3 on the lower surface of the wave valley or the upper surface of the top of the corrugated line, and dried. Cut every time. Such an adhesive 3
A thermosetting resin is used, for example, a nylon-modified phenol resin having a curing temperature of 170 ° C. or more is used. Then, as shown in FIG. 4 (4), the plurality of corrugated sheets 2 are shifted vertically by half a pitch of the wave, and the positional relationship between the valley and the top between the adjacent upper and lower sides is also changed. At the same time, they are stacked in a laminated block shape having the space A as a whole. As described later, a flat plate may be further interposed between such corrugated plates 2 in some cases.

Thereafter, in this type of manufacturing method, the bottom and the top of each of the stacked corrugated sheets 2 are bonded by heating and pressing at the curing temperature of the adhesive 3 as it is. Is done. For example, as shown in FIG. 5A, each corrugated plate 2 is a cell wall 4 and each space A is a cell 5, and a hollow columnar cell 5 defined by each cell wall 4 is formed. The honeycomb core 1 made of the planar assembly of the above is manufactured.

The honeycomb core 1 is made up of a planar assembly of a large number of hollow column-shaped cells 5 partitioned into independent spaces, with the corrugated plates 2 stacked and bonded in this manner as cell walls 4. The cross-sectional shape of the cell wall 4 and the cell 5 is typically a regular hexagonal shape as shown in the figure, but is not limited thereto, and may be trapezoidal, substantially triangular, substantially square, or various other shapes. It is. The honeycomb core 1 has excellent weight ratio strength, is lightweight and has high rigidity and strength, and also has excellent rectifying effect, flatness accuracy, heat insulation, sound insulation, etc., and has a large surface area per unit volume. , Etc., and are widely used as various structural materials.

In the method of manufacturing the honeycomb core 1 according to the present invention, the honeycomb core 1 is manufactured by following such steps in a general example which is a premise thereof. Now, the method for manufacturing the honeycomb core 1 according to the present invention is as follows. That is, in the manufacturing method of the present invention, as described above, the step of stacking the corrugated sheet 2 while interposing the adhesive 3,
The following steps are provided between the steps of bonding between the corrugated plates 2 by pressing.

That is, as shown in FIG. 1, the top member 9 having a sectional shape corresponding to the sectional shape of the space A is densely inserted into the space A formed between the stacked corrugated plates 2, and The bonding is performed. More specifically, such a top member 9 will be described. First, the cross-sectional shape of the core top member 9 is a regular hexagon in the illustrated example, but, of course, various cross-sections corresponding to the cross-sectional shape of the space A and the cell 5. Shapes are conceivable, and are generally prismatic or prismatic. Then, such a top member 9 is densely inserted in all or a part appropriately selected in each space A formed between the corrugated sheets 2. After the bonding by heating and pressing is completed, the inserted frame member 9 is appropriately extracted from the space A between the bonded corrugated plates 2 and the flat plates 11, that is, from the cell 5, and removed. You. Also, FIG.
The top member 9 shown in FIGS. (3) and (4) is different from the top member 9 shown in FIGS. (1) and (2) of FIG. Is provided as a heater, and can generate heat when energized.

In the method for manufacturing the honeycomb core 1 according to the present invention, the top member 9 is used as described above, and after the top member 9 is inserted into the space A formed between the stacked corrugated plates 2. Then, bonding by heating and pressing is performed. by the way,
In the example described above, the honeycomb core 1 is the same as FIG.
As shown in FIG. 1A, the cell wall 4 is composed of only the corrugated sheet 2. However, in the present invention, as shown in FIG. The present invention is also applicable to a method for manufacturing the honeycomb core 1 composed of the honeycomb core 2 and the flat plate 11. The method for manufacturing the honeycomb core 1 in which the flat plates 11 are interposed, stacked, and bonded between the corrugated plates 2 as described above is as follows.

That is, in this manufacturing method, first, the base material 6 is formed into a corrugated sheet 2 in which corrugations are continuously bent by a corrugating apparatus 7 (FIG. 4A, FIG.
(See FIGS. 2 and 3), a plurality of corrugated sheets 2 and a flat plate 11 are sequentially stacked with the adhesive 3 interposed therebetween. At this time, the corrugated plates 2 are sequentially shifted by a half pitch of the waveform and arranged in a positional relationship in which the bottom and the top face each other (see FIG. 5 (2)). At the same time, in the space A formed between each corrugated plate 2 and the flat plate 11, as shown in FIG.
A top member 9 having, for example, a trapezoidal cross section corresponding to the cross sectional shape of the space A is densely inserted, and then heated and pressed at the curing temperature of the adhesive 3. Thereby, each corrugated plate 2 and flat plate 1
Adhere between the two.

Thus, each corrugated plate 2 and flat plate 11 are used as cell walls 4 and each space A is used as a cell 5, and the plane of a hollow columnar cell 5 having a trapezoidal cross section, for example, is defined by each cell wall 4. As a result, a so-called bisect-type honeycomb core composed of a target aggregate is obtained (see FIG. 5 (2)). In addition,
The top member 9 shown in FIG. 2 (2) differs from the top member 9 shown in FIG. 2 (1) in that an energizing heating element 10 is provided. The flat base material 6 is usually used as the flat plate 11 as it is. The method of manufacturing the honeycomb core 1 shown in FIG. 5B is the same as that of the method of manufacturing the honeycomb core 1 shown in FIG. 5A. Therefore, the description is omitted.

The present invention is configured as described above. Then, it becomes as follows. In the method for manufacturing the honeycomb core 1, first, the base material 6 is formed into the corrugated sheet 2, and then the plurality of corrugated sheets 2 are bonded in a positional relationship where the space A is present and the bottom and the top are aligned. The insemination is carried out with the agent 3 interposed (see FIG. 4). Then, by heating and pressing at the curing temperature of the adhesive 3, the corrugated plates 2 are adhered to each other, so that each corrugated plate 2 is a cell wall 4 and each space A is a cell 5, the honeycomb core 1 (See FIG. 5 (1)). At the time of bonding between the stacked corrugated sheets 2 by the above-described heating and pressurization, the top member 9 is inserted into the space A between the corrugated sheets 2 (see FIG. 1) to support each corrugated sheet 2. It is supposed to.

Further, the flat plates 11 are interposed, stacked, and bonded between the corrugated sheets 2 as described above, and at this time, the top members 9 are used (see FIG. 2). It is also conceivable to form each space A, cell wall 4, cell 5 and the like with the flat plate 11 (see FIG. 5 (2)). In addition, it is conceivable to heat the corrugated plates 2 and even the flat plate 11 from the side of the top member 9 in the internal space A when bonding the heating element 10 inside the top member 9 and bonding. (3)
, (4), and (2) of FIG. 2). Furthermore, it is also conceivable to use a material that softens below the curing temperature of the adhesive 3 as the base material 6. That is, the base material of the corrugated sheet 2 or the like or the cell wall 4 is made of a material which is softened at a temperature lower than the curing temperature (for example, about 170 ° C.) (for example, about 130 ° C.) of the adhesive 3 used for bonding the corrugated sheet 2 or the like. It is also possible to use one. In the illustrated example, a base material 6 having a glass transition point of about 120 ° C., in which an epoxy resin is attached to, impregnated with, or mixed with carbon fibers, is used.

Now, in the method of manufacturing the honeycomb core 1, the following first, second, third, fourth and fifth steps are performed. First, the corrugated plates 2 and the flat plates 11 stacked as described above are bonded by heating and pressing. At this time, the top member 9 is inserted into the space A. . Thus, each corrugated plate 2 and flat plate 11 are
Is supported, so that necessary and sufficient pressure for bonding can be applied.

Second, since a necessary and sufficient pressure can be applied at the time of bonding as described above, the heating between the corrugated plates 2 and between the corrugated plates 2 and the flat plate 11, that is, between the cell walls 4. , By pressure, it can be surely adhered. In other words, the adhesive 3 that has been melt-cured by heating is reliably pressed, so that the corrugated sheets 2 to be bonded to each other and the corrugated sheets 2
And the flat plate 11 are securely bonded in a streak shape.

Third, the corrugated plates 2 and the flat plates 11 stacked as described above are heated at the curing temperature of the adhesive 3.
At this time, the top member 9 is inserted into the space A. Since the corrugated sheet 2 and the flat plate 11 are supported by the top member 9 as described above, as the base material 6 of each corrugated sheet 2 or the flat plate 11, a plastic or a fiber-reinforced plastic that softens below the curing temperature of the adhesive 3 is used. Etc. can also be used. That is, each corrugated sheet 2
Even if the flat plate 11 is slightly softened by heating at the curing temperature of the adhesive 3, since it is supported by the top member 9, the occurrence of collapse, deformation, collapse, etc. is avoided. .

Fourth, these first, second and third points can be easily and easily realized by employing the top member 9 in the method of manufacturing the honeycomb core 1. That is, when bonding between the stacked corrugated sheets 2 or between the corrugated sheets 2 and the flat plate 11 by heating and pressing, the top member 9 is inserted into the formed space A, and each point is formed by a simple configuration. Is easily realized.

Fifth, the top member 9 is provided with (3) in FIG.
As shown in the figures, (4) and (2) of FIG. 2, the case where the current-carrying heating element 10 such as a nichrome wire is internally provided is further as follows. That is, by heating the energizing heating element 10 by energizing, heating from the side of the top member 9 inserted into the internal space A is performed in addition to external heating. About adhesive 3
The time required for heating for heating, which is required for bonding by curing of the adhesive 3, is shortened, and the time for heating and curing the adhesive 3 is shortened.

[0029]

According to the method for manufacturing a honeycomb core according to the present invention, as described above, each of the stacked corrugated sheets (Claim 2)
Then, when bonding by heating and pressing between each plate)
By inserting the top member into the space,
The following effects are exhibited.

First, a necessary and sufficient pressure for bonding can be applied. That is, in the method for manufacturing the honeycomb core, the heating and pressurizing are performed between the stacked corrugated sheets (further, the respective flat plates in claim 2) at the time of bonding.
Since the top member is inserted, each corrugated sheet (and further each flat plate) is supported by the top member, so that a necessary and sufficient pressure for bonding can be applied. That is,
As in the above-described conventional example, a situation in which an insufficiently weak pressure can be applied to the bonding can be avoided, and if too much pressure is applied, the corrugated sheets (and even the flat ) And cell walls and cells will be crushed,
The danger of being avoided.

Second, the adhesive strength is greatly improved. That is, in the method for manufacturing the honeycomb core, as described above, since a necessary and sufficient pressure can be applied at the time of bonding, it can be applied between the corrugated sheets (further, between the corrugated sheets and the flat plate in claim 2). The cell walls are securely bonded.
As a result, a honeycomb core having excellent adhesive strength can be obtained, and there is no fear that the compressive strength or shear strength is pointed out as in the above-described conventional example.

Third, a material that softens below the curing temperature of the adhesive can be used. In other words, in this method for manufacturing a honeycomb core, the stacked corrugated plates (and the respective flat plates in claim 2) are bonded by heating and pressing, and at this time, the top member is inserted. Therefore, each corrugated sheet (and each flat sheet) is supported by the top member. Therefore, when a material that softens below the curing temperature of the adhesive is used as the base material, even if the material is slightly softened by heating at the curing temperature of the adhesive, the above-described conventional example of this type is used. As described above, the stacked corrugated plates (and each flat plate) and the cell walls and cells are not crushed and the entire shape is not collapsed. Thus, a base material of a material that softens below the curing temperature of the adhesive, that is, a base material that can be formed by heating at a relatively low temperature can be used, and the range of selection of the material of the base material is widened.

Fourth, and they are easily and easily realized. That is, in the method for manufacturing the honeycomb core, the above-described first, second, and third points can be easily realized by a simple configuration employing the top member, and the cost is excellent.

In the third aspect, the following effects are exhibited in addition to the above-mentioned effects by providing the top member with the energized heating element. Fifth, it is possible to shorten the heating time of the adhesive. That is, in this method of manufacturing a honeycomb core, the stacked corrugated sheets (each flat plate in claim 2) are bonded by heating and pressing, and at this time, each corrugated sheet is inserted into the internal space. The heated top member is also heated by the built-in energizing heating element. Accordingly, the heating time required for heating required for bonding is shortened, and the heat curing time of the adhesive is shortened, so that the overall bonding time and the manufacturing time of the honeycomb core are also reduced accordingly. As described above, the effects exhibited by the present invention are remarkable and large, for example, all the problems existing in this type of conventional example are solved.

[Brief description of the drawings]

FIG. 1 is a perspective view for explaining an embodiment of a method for manufacturing a honeycomb core according to the present invention, in which FIG. 1A shows a main part of a first example, and FIG. First
The top member in the example is shown, FIG. 3 (3) shows the main part of the second example, and FIG. 4 (4) shows the top member in the second example.

FIGS. 2A and 2B are perspective views for explaining the embodiment of the present invention, and FIG. 2A shows a top member in a third example, and FIG.
The figure shows the top member in the fourth example.

FIG. 3 is a perspective view for explaining a method for manufacturing a honeycomb core of this type of conventional example, and FIG.
FIG. 2 (2) shows the collapsed state, FIG. 3 (3) shows the obtained honeycomb core, and FIG. 4 (4) shows the collapsed shape.

FIG. 4 is an explanatory front view for explaining a general method for manufacturing a honeycomb core, and FIG.
FIG. 2B shows a corrugated sheet forming step, FIG. 3C shows a formed corrugated sheet, and FIG. 4D shows a step of laminating and joining corrugated sheets.

FIGS. 5A and 5B are front explanatory views of a honeycomb core, in which FIG. 1A shows one example and FIG. 5B shows another example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Honeycomb core 2 Corrugated sheet 3 Adhesive 4 Cell wall 5 Cell 6 Base material 7 Corrugating device 8 Rack 9 Top member 10 Electric heating element 11 Flat plate A space

Claims (4)

[Claims] After a base material is formed into a corrugated sheet in which corrugations are continuously bent by a corrugating apparatus, a plurality of corrugated sheets are sequentially shifted by a half pitch of a corrugated sheet to form a bottom portion. In the positional relationship where the top and the top are aligned, the stacking is performed while interposing the adhesive, and the top member having the cross-sectional shape corresponding to the cross-sectional shape of the space is densely inserted into the space formed between the corrugated plates. Then, by heating and pressing at the curing temperature of the adhesive,
A honeycomb formed of a planar aggregate of hollow columnar cells defined by the cell walls while adhering the corrugated sheets to each of the corrugated sheets as cell walls and each of the spaces as cells. A method for manufacturing a honeycomb core, comprising obtaining a core. 2. A base material is formed into a corrugated sheet in which corrugations are continuously bent by a corrugating apparatus, and a plurality of the corrugated sheets and a flat plate are bonded with an adhesive. While stacking sequentially while mounting, with respect to each corrugated sheet, it is sequentially shifted by a half pitch of the waveform and arranged in a positional relationship in which the bottom and the top are opposed to each other, and between each corrugated sheet and the flat plate. After tightly inserting a top member having a cross-sectional shape corresponding to the cross-sectional shape of the space into the formed space, heating and pressurizing at the curing temperature of the adhesive, the gap between each corrugated plate and the flat plate is increased. To form a honeycomb core consisting of a planar aggregate of hollow columnar cells defined by the cell walls, with each of the corrugated plates and the flat plate being a cell wall and each of the spaces being a cell. And a method for manufacturing a honeycomb core. 3. The method for manufacturing a honeycomb core according to claim 1, wherein an electric heating element is provided inside the top member. 4. The method for manufacturing a honeycomb core according to claim 1, wherein the base material is made of a material that softens at a temperature lower than a curing temperature of the adhesive. Manufacturing method.