JPH08238697A - Honecomb core and manufacture thereof - Google Patents

Abstract

PURPOSE: To provide a honeycomb in which its compression strength is improved or particularly a weight ratio strength is excellent, necessity of reducing a cell size is low to avoid various problems in manufacturing and which can be simply and easily manufactured and a method for manufacturing the same. CONSTITUTION: The honeycomb 7 is a planar aggregate of hollow columnar cells 11 and 12 partitioned by a cell wall 8 which is formed of a unit shape in which the two stages of the cells 12 of rectangular parallelepiped shape of a sectional rhombic shape are aligned and gathered symmetrically at the periphery with the cells 11 of a sectional hexagonal shape at the center. A pair of opposed cell walls 8 for forming the cells 12 of the parallelepiped shape are formed of multiple connection structure A of sequentially different numbers, and a pair of opposed cell walls 8 for forming the cells 11 of a hexagonal shape are further connected to the liner extended part B of the one wall 8 of the structure A. Such a honeycomb 7 is manufactured by utilizing a conventional spreading method.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a honeycomb core and a method for manufacturing the same. That is, the present invention relates to a honeycomb core formed of a planar aggregate of hollow columnar cells and widely used as various structural materials and the like, and a manufacturing method thereof.

[0002]

2. Description of the Related Art FIG. 5 shows a conventional honeycomb core,
(1) is a perspective view, (2) is an enlarged front view,
FIG. 6 is a perspective explanatory view showing each step of the manufacturing method by the spreading method, and FIG. 7 is a front explanatory view showing each step of the manufacturing method by the corrugated method. As shown in these drawings, the honeycomb core 1 is made up of a planar aggregate of hollow columnar cells 3 defined by the cell walls 2, and the cross-sectional shapes of the cell walls 2 and the cells 3 are conventional. All had regular hexagonal shapes, trapezoidal shapes, and other uniform shapes. That is, in the conventional honeycomb core 1, the cells 3 have a regular hexagonal shape and other shapes, and all the cells 3 have the same uniform shape.

Further, such a honeycomb core 1 was manufactured by a so-called spreading method or corrugation method. First, the spreading method will be described. FIG. 6A shows the step of preparing the base material sheet 4, and FIG. 6B shows the cutting step.
(3) The figure shows the process of disposing the bonding material 5 such as an adhesive.
The figure (4) shows the stacking step, and the figure (5) shows the spreading step. As shown in the figure, in the manufacturing method by the spreading method, after the bonding material 5 is arranged on the base material sheet 4 in parallel at a predetermined width and interval by coating or the like, a plurality of base material sheets 4 are formed. The honeycomb cores 1 were manufactured by stacking and heating the stacks to bond them to each other, and then cutting the stacks into predetermined width dimensions and expanding the stacks in the stacking direction. Next, the corrugation method will be described. FIG. 7A shows the base material sheet 4
(2) Figure shows the process of bending,
(3) shows the obtained corrugated sheet 6, and (4) shows the step of laminating and joining the corrugated sheet 6. As shown in the figure, in this manufacturing method by the corrugated method, the corrugated sheet is formed by corrugating the base material sheet 4 by the corrugating apparatus G in a linear and parallel manner at a predetermined pitch and height. After being bent into 6, a plurality of corrugated sheets 6 cut into predetermined lengths are laminated in a block shape with an overall space while interposing a bonding material 5 such as an adhesive and by heating. The honeycomb cores 1 were manufactured by joining them.

[0004]

By the way, the following problems have been pointed out in such a conventional example. First
In addition, it is generally known that the honeycomb core 1 is excellent in weight ratio strength, is lightweight, and has high rigidity and strength, but when particularly strong compressive strength in the cell axis direction is required. It was necessary to reduce the size of the cells 3 (increase the density of the honeycomb core 1). That is, the conventional honeycomb core 1 has a problem that the compression strength is significantly reduced as the size of the cell 3 is increased.
That is, in the honeycomb core 1, a portion for maintaining strength and a portion for applying a stress are portions of the cell walls 2 having a double-bonded structure in particular (that is, the bonding between the cell walls 2 by a bonding material 5 such as an adhesive). However, in the conventional honeycomb core 1, the compressive strength is greatly reduced when the size of the cell 3 is increased due to the relatively small number of such bonded structure portions of the cell walls 2. Was there. The situation during this period is the same whether the honeycomb core 1 is manufactured by the spreading method or the corrugated method.

Secondly, if the size of the cells 3 of the honeycomb core 1 is reduced in order to improve the compressive strength, many problems will occur in manufacturing.
That is, if the cells 3 of the honeycomb core 1 are small, more cell walls 2 are used accordingly, and correspondingly, when manufacturing the base material, regardless of whether it is a spreading method or a corrugated method, the base material is used. Since the stacking of sheets 4 and the number of stacked sheets are large and thick, it takes a long time to heat the sheets 4, and a large amount of heat is required. Further, it is difficult to cut with high accuracy and many defects occur, and cost increase is pointed out. Various problems will occur on the surface.

In view of the above situation, the present invention has been made to solve the problems of the above-mentioned conventional example, in which a parallelogram cell is symmetrically arranged in two stages around a hexagonal cell. A plurality of parallel-shaped cells, each of which has a parallel-shaped cell structure.
Since the pair of cell walls are joined to the linear extension of the multi-joint structure, firstly, the compressive strength is improved, and secondly, there is no need to reduce the cell size. In addition, it is an object of the present invention to propose a honeycomb core and a manufacturing method thereof that can be manufactured easily and easily.

[0007]

The technical means of the present invention for achieving this object is as follows. First, claim 1
About: That is, this honeycomb core is
A planar aggregate of hollow columnar cells partitioned and formed by cell walls, wherein the cells each having a hexagonal cross section are parallel to each other and the cells each having a parallelogram cross section are symmetrical in two steps. It is composed of a plurality of unit forms arranged side by side. In the above unit form, each pair of facing cell walls forming each of the parallelogram cells arranged in parallel has a sequentially different number of multiple junction structures, and faces each other forming the hexagonal cells. A pair of cell walls are joined to a straight extension of each cell wall of such a multi-joint structure.

Next, claim 2 is as follows. That is, in the method for manufacturing a honeycomb core according to the present invention, in each of the base material sheets forming each unit, the bonding material is arranged in parallel at different widths, positions, and intervals, and then the base material sheets are formed. The material sheets are stacked and heated to bond them to each other and then spread in the stacking direction to manufacture a honeycomb core. Then, at this time, for each of the base material sheets forming the unit, the bonding material is overlapped and regularly displaced when stacked, while excluding at least a cell wall corresponding portion that is not a bonding target as a space. They are arranged in a positional relationship.

[0009]

Since the present invention comprises such means, it operates as follows. This honeycomb core has a unit shape in which a plurality of parallelogrammic cells centering on hexagonal cells are symmetrically arranged in two stages, respectively. Then, the cell walls forming a pair of parallelogram cells arranged side by side are
A pair of cell walls of hexagonal cells are joined to the linear extension of this multiple junction structure while being composed of sequentially different numbers of multiple junction structures.

Therefore, firstly, this honeycomb core mainly has a large number of cell wall bonding structures that maintain its strength and stress acts, and also has a multiple bonding structure of a double bonding structure or more. In addition to the hardening strength of the bonding material, the compressive strength in the cell axis direction is greatly improved. Secondly, in order to improve the compressive strength, the number of cases in which the cell size of the honeycomb core is reduced is also reduced, so that the stacking of the base material sheets and the number of laminated sheets do not become large and thick during the manufacturing, and it takes a lot of time for heating. Therefore, it is possible to avoid the occurrence of problems such as requiring a large amount of heat, making it difficult to cut with high precision and causing many defects. Thirdly, in this honeycomb core, as in claim 2, the base material sheets forming each unit are arranged in a positional relationship in which the bonding materials are overlapped and regularly displaced when stacked. By doing so, it is possible to easily and easily manufacture using the conventional spreading method.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the drawings. 1 and 2 show an embodiment of a honeycomb core according to the present invention, FIG. 1 is a front view, FIG. 2 is an enlarged front view of a main part thereof, and FIG. 3 is a honeycomb core according to the present invention. FIG. 6 is an enlarged front explanatory view for explaining the example of the manufacturing method and for the step of stacking the base material sheets. FIG.
Shows a modified example of the honeycomb core according to the present invention, (1)
The figure is an enlarged front view of an essential part of an example in which cells have a flat shape, and (2) is an enlarged front view of an essential part of an example in which a partition plate is arranged.

First, a method of manufacturing the honeycomb core 7 will be described. This manufacturing method is based on the so-called spreading method. First, in accordance with the above-mentioned conventional example (see FIG. 6), each base material sheet 4 forming each unit is parallel to each other at different widths, positions, and intervals. After arranging the bonding material 5 such as an adhesive by coating or the like, the respective base material sheets 4 are stacked and heated to bond them to each other and then spread in the stacking direction. A predetermined honeycomb core 7 is manufactured.

The general manufacturing method by the spreading method will be described in more detail (see also FIG. 6). As the base material sheet 4, an aluminum foil, other metal foil, a cellulose fiber sheet, a mixed paper sheet of cellulose fiber and organic fiber,
A mixed sheet of cellulose fibers and inorganic fibers or inorganic materials, a composite sheet containing other pulp, an organic fiber sheet, a film sheet of various thermoplastics, a fiber reinforced plastic (FRP) sheet, or a sheet of various other materials is used. As the fiber reinforced plastic (FRP) sheet, glass fiber, Kevlar fiber, carbon fiber, composite fiber of these, other various fibers, and phenol resin or other thermosetting resin or thermoplastic resin are adhered, A typical example is a combination of impregnation and mixing. Further, as the bonding material 5, an adhesive made of a thermoplastic resin or a thermosetting resin is typically used, but a brazing material such as solder may be used instead of this.

Then, using the base material sheet 4 and the bonding material 5 as described above, first, the base material sheets 4 forming each unit are bonded in parallel at predetermined different widths, positions and intervals described later. The material 5 is arranged by coating or the like. Then, after such an arranging step, the respective base material sheets 4 on which the bonding material 5 is arranged are preheated as necessary or piled up and down in a predetermined positional relationship while being kept at room temperature. After that, the bonding material 5 is melted and hardened by heating to bond them to each other. Then, after such stacking and joining steps, the block body of the base material sheet 4 is cut into pieces each having a predetermined width dimension, and a stretching step of pulling in the vertical stacking direction is followed to obtain a structure shown in FIG. As shown in FIG. 2, the cell wall 8 is formed from the base material sheet 4, and the predetermined honeycomb core 7 is manufactured.

Now, in the method of manufacturing the honeycomb core 7 by the spreading method, as shown in FIG. 3, each base material sheet 4 forming each unit (that is, forming one unit).
Regarding, the bonding material 5 is the cell wall 8 that is not the bonding target.
(Refer to FIGS. 1 and 2) The corresponding portion 9 is at least the space 10
However, when they are piled up, they are arranged so that they partially overlap and are regularly displaced. That is, the bonding material 5 first forms the central hexagonal cells 11 (see FIGS. 1 and 2), and for the one base material sheet 4, the central corresponding portions 9 and the like are spaced at intervals of 5 by 10. At the same time, the bonding material 5 is arranged on the left and right of the bonding material 5. Next, regarding the base material sheet 4 on the upper and lower sides, the base material sheet 4
The joining material 5 is arranged at a width of 1 in the center so as to be opposed to the center of the interval 10 of 5 and the interval 10 of 4 is provided on the left and right sides thereof. 5 is provided. Further, with respect to the base material sheets 4 on the upper and lower sides thereof, the bonding material 5 is arranged at a width of 5 in the center, facing the bonding material 5 of 1 in the base material sheet 4.
There is an interval 10 at a ratio of 4 on the left and right sides, and a bonding material 5 is arranged on the left and right sides. Further, with respect to the upper and lower outer side base material sheets 4, the joint material 5 is arranged at a width of 9 in the center so as to face the joint material 5 in the ratio of 5 of the base material sheet 4, and the left and right sides thereof are arranged. There is an interval of 10 at a ratio of 4, and the bonding material 5 is arranged on the left and right of the interval. Further, regarding the upper and lower outer side base material sheets 4, 9
The bonding material 5 is arranged at a ratio of 13 at the center so as to face the bonding material 5 at a ratio of 10 and a space 10 is arranged on the left and right thereof.

As described above, for each of the base material sheets 4, ...
Are arranged at different widths, positions, and intervals 10 under the relationship that they partially overlap and are regularly deviated from each other. Then, after the joining process using the joining material 5 thus arranged, in the spreading process, the respective base material sheets 4, ...
The cells are expanded to form the cell walls 8 (the smaller the angle, the flatter the cells 11 and 12 described later), so that the predetermined honeycomb core 7 described later is manufactured. First, the arrangement width of the bonding material 5, the position, the specific ratio of the intervals 10 and the like in the above-described bonding material 5 arranging step are as follows.
This is only one example, and various other specific ratio combinations are possible. Secondly, although the bonding material 5 may be arranged on one side of each base material sheet 4 as in the illustrated example, the bonding material 5 may be arranged on both sides of every other base material sheet 4. Then, even if the base material sheets 4 that do not carry out this are interposed between them and the respective base material sheets 4 are stacked, the same result as the illustrated example is obtained.

Next, the honeycomb core 7 thus obtained will be described. The honeycomb core 7 shown in FIGS. 1 and 2 is manufactured by the manufacturing method by the spreading method shown in FIGS. 3 and 6 described above. And this honeycomb core 7
First, as shown in FIG. 1, is a planar aggregate of hollow columnar cells 11 and 12 partitioned and formed by a cell wall 8, and the cross-sectional shape is centered on the hexagonal cell 11 in cross section. The cells 12 each having a parallelogram shape are formed in a unit form in which a plurality of cells 12 are symmetrically arranged side by side in two stages. In each unit form, as shown in FIG. 2, each pair of opposing cell walls 8 forming each parallelogram-shaped cell 12 is composed of a different number of multiple junction structures A, and A pair of opposing cell walls 8 forming a hexagonal cell 11 are joined to a straight extension B of each cell wall 8 of such a multi-joint structure A.

The honeycomb core 7 will be described in more detail. The honeycomb core 7 is made up of a planar aggregate of hollow columnar cells 11 and 12 each having the base material sheet 4 as a cell wall 8 and divided into independent spaces. Each of the unit forms has a hexagonal cell 11 in cross section, and the left and right sides of the cell 11 are symmetrical vertically in two steps, and each of the three cells has a total of 12 cross sections such as rhombus parallelograms. The cells 12 in the shape are gathered side by side. And 1
One unit form is provided with one cell 11 having a hexagonal cross-sectional shape, but the cell 12 having a parallelogram cross-section has a configuration in which other peripheral unit forms are also used.

In this one unit form, a pair of opposing cell walls 8 forming each parallelogrammatic cell 12 (upper and lower cell walls 8 in the drawing).
Are each made up of sequentially different numbers of multi-joint structures A. That is, the cell wall 8 in this portion has a multi-joint structure A in which 2, 4, 6, and even-numbered cells are joined by the joining material 5. And in such one unit form,
A straight extension B of the cell wall 8 of the upper and lower multi-junction structure A forming each of the parallel quadrilateral cells 12 in the upper and lower stages, that is, the cell wall of the upper and lower multi-junction structure A of the left and right parallelogram cells 12 The upper and lower cell walls 8 of the hexagonal cell 11 are joined to the straight extension B between the eight. That is, a pair of opposing upper and lower cell walls 8 forming the hexagonal cells 11 are bonded to the linear extension B of the cell wall 8 of the above-described multi-bonded structure A with the bonding material 5.
Thus, in this portion, a total of eight multi-joint structures A are formed together with the cell walls 8 of other unit forms located above and below.

First, the honeycomb core 7 shown in FIG. 4 (1) shows a modification of the present invention, which is shown in FIG.
Compared to the one shown in FIG. 2, it has a substantially flat shape as a whole. The honeycomb core 7 of such a modified example is manufactured by setting the expansion angle in the above-described expansion step to be smaller than that shown in FIGS. 1 and 2. Secondly, the honeycomb core 7 shown in FIG. 4 (2) also shows a modified example of the present invention, in which the partition plate C is arranged between the linear extension portions B described above. This partition C is made of cardboard, cardboard,
It is made of a thick plate material made of other material, and is arranged in parallel with the cell axes of the cells 11 and 12 of the honeycomb core 7, and is joined so as to be sandwiched in the center of the linear extension portion B of the cell wall 8. It functions to further reinforce the compressive strength of the core 7. Thirdly, the honeycomb core 7 of the illustrated embodiment
In one unit form, one cell 11 having a hexagonal cross section is a center, and a cell 12 having a parallelogram cross section is a center.
However, regardless of this, a total of 12 cells each having a parallelogram shape with a cross-sectional shape of 8 cells each having 2 cells, 8 cells each having 4 cells, 16 cells each having 5 cells, 20 cells each having 5 cells, etc. May be collected together.

The honeycomb core 7 has such a cell 1 as described above.
It consists of 1 and 12 planar aggregates. This honeycomb core 7 also has an excellent weight-to-weight ratio strength, is lightweight and has high rigidity and strength, like the general one, and has a rectifying effect.
It is known that the flatness, heat retention, and sound insulation are excellent, and that the surface area per unit volume is large, etc., but this honeycomb core 7 is particularly excellent in weight ratio strength and compressive strength in the cell axis direction. Will be improved. Therefore, this honeycomb core 7
Taking advantage of these characteristics, various structural materials for construction, construction, fittings, structural materials such as various containers, boxes, and containers, structural materials for aircraft, space equipment, communication equipment, and other various structural materials Widely used for.

FIG. 8 shows an example of the use of such a honeycomb core 7, wherein (1) is a front view of the use as a girder material, and (2) is a use as a sleeper. An example front view, (3) figure is a perspective view of a use example as a beam, and (4) figure is a front view of a use example as a frame. First, in FIG. 8 (1), a honeycomb core 7 is used as a girder material attached below the pallet body 13, and a fork claw such as a forklift is inserted between the honeycomb cores 7. In FIG. 8 (2), the honeycomb core 7 is used as a sleeper for preventing the center roll and the drum 14 from moving, and is fixed on the immovable part so as to sandwich the roll and the drum 14 from the left and right. In the figure, reference numeral 15 denotes a surface plate joined to the open end surface of the honeycomb core 7. In FIG. 8 (3), the honeycomb core 7 used as a beam for construction and construction is shown. In FIG. 8 (4), the honeycomb core 7 used as a frame of a door 16 for fittings, for example, is shown.

The present invention has been described above. Then it becomes as follows. This honeycomb core 7 is
It has a unit form in which a plurality of cells 12 each having a parallelogram shape in cross section are symmetrically gathered in two stages around a cell 11 having a hexagon cross section (see FIG. 1). In each unit form, the cell walls 8 forming the upper and lower pairs of the cells 12 each having a parallelogram-shaped cross section arranged side by side are composed of sequentially different numbers of the multi-junction structure A, and the cells 11 having a hexagonal cross section. A pair of cell walls 8 are joined to the upper and lower linear extensions B of such a multi-joint structure A (see FIG. 2,
(See FIG. 4). Now, according to this honeycomb core 7 and the manufacturing method thereof, the following first, second, and third aspects are obtained.

First, in the honeycomb core 7, the main part for maintaining strength and the part on which stress acts are bonded in the cell walls 8, particularly between the cell walls 8 by a bonding material 5 such as an adhesive. It is a structural part. In the honeycomb core 7, compared to the honeycomb core 1 of the conventional example of the kind shown in FIG. 5, the number of the bonding structure portions of the cell walls 8 is larger and the double bonding is first performed. The structure is a multi-joint structure A that is more than the structure, and further, due to the quantitative increase of the curing strength of the joining material 5 such as an adhesive for joining, the above-mentioned joined structure portion of the cell wall 8 has both the quantity and the quality. It is much more complete. Therefore, the honeycomb core 7 has a higher compressive strength in the cell axis direction, and when a strong compressive strength is required, the honeycomb core 1 of the conventional example of this kind described above.
Cell 1 without reducing the size of cell 3 like
Even if the sizes of 1 and 12 remain unchanged, the number of cases that can be adequately increased will increase.

Secondly, in order to improve the compressive strength, the number of cases in which the size of the cells 11 and 12 of the honeycomb core 7 is reduced (the density of the honeycomb core 7 is increased) is also reduced.
Therefore, as in the above-described conventional honeycomb core 1 of this type, the size of the cells 3 is reduced to improve the compressive strength. As a result, the weight of the base material sheet 4 is reduced when manufacturing the cells (see FIGS. 6 and 7). It is possible to avoid problems in manufacturing, such as a large number of stacked and laminated sheets, a large thickness, a long heating time and a large amount of heat, a difficulty in cutting with high accuracy, and a large number of defects.

Thirdly, the honeycomb core 7 can be easily and easily manufactured by using the conventional spreading method. That is, first, for each base material sheet 4 forming each unit, the bonding materials 5 are arranged in a positional relationship in which they partially overlap each other when they are stacked and are regularly deviated from each other (see FIG. 3), and can be easily and easily manufactured by using a conventional spreading method (see FIG. 6).

[0027]

As described above, in the honeycomb core and the method for manufacturing the same according to the present invention, a plurality of parallelogrammic cells centering around hexagonal cells are symmetrically arranged in two stages. The cell walls of each unit of parallelogram arranged side by side have a multi-junction structure of different numbers, and one pair of hexagonal cells has a multi-junction structure. The following effects are exhibited by being joined to the straight extension.

First, the compressive strength is improved. That is,
This honeycomb core has a high compressive strength. Compared with the above-mentioned conventional honeycomb core of this type, the compressive strength is stronger when the cell size is the same, and the cell size can be made larger when the cell size is the same. As described above, this honeycomb core is extremely excellent in the weight-specific strength, is lightweight, and is further excellent in the characteristics of high rigidity and strength.

Second, there is less need for a smaller cell size. That is, since the honeycomb core has improved compressive strength as described above, the cell size is reduced (increased density of the honeycomb core) in order to improve the compressive strength, which may cause many problems in manufacturing. Avoided. That is, like the honeycomb core of this type of conventional example described above, as a result of reducing the cell size to improve the compressive strength, the stacking of the base material sheets and the number of laminated sheets become large and thick during the manufacturing, and therefore the heating of the core material often increases. It is possible to avoid problems in manufacturing, such as requiring time and heat amount, difficult to cut with high precision and many defects, resulting in cost increase.

Third, it is simple and easy to manufacture. That is, this honeycomb core can be easily and easily manufactured by using the conventional spreading method. As described above, the effects of the present invention are remarkably large, such as the problems existing in this type of conventional example are eliminated.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of a honeycomb core according to the present invention.

FIG. 2 is an enlarged front view of a main part of the embodiment.

FIG. 3 is an enlarged front explanatory view for explaining the embodiment of the method for manufacturing the honeycomb core according to the present invention and for the step of stacking the base material sheets.

FIG. 4 shows a modification of the honeycomb core according to the present invention,
FIG. 1A is an enlarged front view of an essential part of an example in which a cell has a flat shape, and FIG. 2B is an enlarged front view of an essential part of an example in which a partition plate is arranged.

[Fig. 5] Fig. 5 shows a conventional honeycomb core, in which (1) is a perspective view and (2) is an enlarged front view.

[Fig. 6] Fig. 6 is a perspective explanatory view for explaining a method for manufacturing a honeycomb core by a conventional spreading method, in which (1) is a step of preparing a base material sheet, and (2) is a cut step.
The figure (3) shows the step of disposing the bonding material, the figure (4) shows the step of stacking, and the figure (5) shows the step of spreading.

[Fig. 7] Fig. 7 is a front explanatory view for explaining a method for manufacturing a honeycomb core by a conventional corrugation method, in which (1) is a step of preparing a base material sheet and (2) is a bending step. FIG. 3 (3) shows the obtained corrugated sheet, and FIG. 4 (4) shows the step of laminating and joining the corrugated sheets.

FIG. 8 shows various usage examples of the honeycomb core as a structural material, (1) is a front view of the usage example as a girder material, and (2)
The figure is a front view of a use example as a sleeper, (3) is a perspective view of a use example as a beam, and (4) is a front view of a use example as a frame.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Honeycomb core (conventional example) 2 Cell wall (conventional example) 3 Cell (conventional example) 4 Base material sheet 5 Bonding material 6 Corrugated plate 7 Honeycomb core (of the present invention) 8 Cell wall (book) (Invention) 9 Corresponding part 10 Interval 11 Cell (Invention) 12 Cell (Invention) 13 Pallet body 14 Roll or drum 15 Surface plate 16 Door A Multiple joint structure B Straight extension C Partition plate G Corrugate Molding equipment

Claims (2)

[Claims] 1. A planar aggregate of hollow columnar cells partitioned and formed by cell walls, wherein the cells each having a hexagonal cross section are parallel to each other, and the cells each having a parallelogram cross section are respectively formed. In a unit form in which a plurality of cells are symmetrically arranged side by side in two stages, each pair of facing cell walls forming each of the parallelogrammic cells in the above unit form is different in number. And a pair of opposing cell walls forming the hexagonal cell are joined to a straight extension of each cell wall of such a multi-joint structure. And honeycomb core. 2. By arranging the bonding materials in parallel at different widths, positions, and intervals for each base material sheet forming each unit, stacking the base material sheets and heating them. In the method of manufacturing a honeycomb core by expanding the stacking direction after joining each other, in each of the base material sheet forming the unit, the bonding material, the cell wall corresponding portion that is not the bonding target The method for manufacturing a honeycomb core according to claim 1, wherein the honeycomb cores are arranged in a positional relationship in which they overlap each other when they are stacked and are regularly displaced while being excluded at least as intervals.