JPH04232040A - Manufacture of honeycomb core - Google Patents

Abstract

PURPOSE:To firstly make it possible to continuously and automatically carry out processes ranging from the application of adhesive to the stacking, secondly prevent the shifting of pitch, curl and the like from occurring, thirdly realize favorable yield and the like and fourthly make the proper application of the adhesive in the width direction or in the longitudinal direction of base material possible whether the material is metal or non-metal. CONSTITUTION:On both sides A1 and A2 of band-like base material A, adhesive B is applied in strips in the width direction C or the longitudinal direction D at predetermined pitches P over a predetermined length in the longitudinal direction D and at every interval E having the same and constant length in succession and repeadedly. After the application of adhesive and the respective specification of parts F to be bent at the boundary portion between both the sides A1 and A2, the base material A is guided and fed with a moving roller, which horizontally reciprocates by the constant length, so as to apply pressing force to the parts F to be bent in order to bend the base material continuously at regular intervals in zigzags and to stackingly fold it up.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a honeycomb core. That is, the present invention relates to a method of manufacturing a honeycomb core by subjecting a base material to predetermined steps of adhesive application, stacking, heating and pressing, and stretching.

0002

2. Description of the Related Art Conventionally, the method for manufacturing a honeycomb core was generally as follows. That is, first, adhesive is applied in strips at a predetermined pitch in the width direction or longitudinal direction to a metal or non-metallic base material in the form of a strip, etc., and then the base material is coated at predetermined length intervals. After cutting into rectangular or other sheet shapes, the applied adhesive is stacked in a block shape with the positions shifted by half a pitch. After bonding by heating and pressing, a honeycomb core was manufactured by stretching the base materials stacked and bonded in a block shape in the stacking direction.

[0003] When a non-metallic base material, particularly a paper base material, is used, the following manufacturing method has sometimes been adopted. That is, first, adhesive is applied in stripes at a predetermined pitch in the width direction or longitudinal direction on one side of a strip-shaped paper base material fed out from a supply roll, and at the same time, on the other side of the base material. , the adhesive is applied in a linear manner at a position shifted by a half pitch from the adhesive application position on one side. Next, a strip-shaped paper base material without adhesive is applied.
The base material coated with the adhesive as described above is stacked on top of the base material, and these are rolled up onto a cylindrical or polygonal drum to be stacked while being adhered. Thereafter, a honeycomb core made of paper or the like was manufactured by cutting the base material into predetermined lengths and stretching the base material thus obtained and stacked and bonded in a block shape in the stacking direction.

0004

[Problems to be Solved by the Invention] However, the following problems have been pointed out in such conventional methods for manufacturing honeycomb cores. First of all, regarding the former, that is, the manufacturing method that has been commonly used in the past, the following is as follows.

First of all, there is a problem in that the steps from adhesive application to stacking cannot be carried out continuously and automatically using a series of devices, making each task cumbersome and resulting in poor production efficiency. In other words, as mentioned above, the base materials coated with adhesive were first cut and then piled up by hand, so each work was done separately, and the entire process from adhesive application to stacking was carried out using a series of integrated equipment. This method could not be realized, was time consuming, required a large work space, was troublesome, and had low production efficiency and cost problems.

[0006] Secondly, there was a problem that a high quality and high precision honeycomb core could not be stably obtained. In other words, as mentioned above, manual work is involved, which tends to lead to uneven quality, and especially when stacking by hand, the linear adhesive is not accurately positioned by half a pitch, resulting in pitch misalignment. It was easy. In addition, pitch deviations are likely to occur due to expansion and contraction of the base material, which is difficult to deal with by manual stacking.Furthermore, if the base material is opaque, it is difficult to confirm, and from this perspective, pitch deviations are also likely to occur. was likely to occur. It has been pointed out that due to these, a honeycomb core with a uniform cell shape cannot be obtained.

Next, regarding the latter, that is, a manufacturing method using drum winding, which has been carried out for non-metallic, particularly paper, base materials, the following will be described.

First, in this conventional example, the steps from adhesive application to stacking can be carried out continuously and automatically using a series of devices. In other words, although the first problem pointed out in the above-mentioned general conventional example is solved, the next problem is pointed out.

[0009]Secondly, there is still a problem that high quality and high precision honeycomb cores cannot be stably obtained. In other words, if adhesive is first applied along the width direction of the base material because a long honeycomb core is required in the ribbon direction, as the winding diameter on the drum increases, the adhesive will be applied in strips. Positional deviation, that is, pitch deviation, had occurred. In addition, especially when a cylindrical drum is used, the rolled base material tends to have curls and curls, which poses a problem in handling during subsequent expansion. It has been pointed out that due to these factors, it becomes impossible to obtain a honeycomb core with a uniform cell shape.

Third, the yield of the base material during cutting is poor, which also poses a cost problem. In other words, when a honeycomb core that is long in the stretching direction is required, the winding diameter of the base material on the drum becomes large, but the larger the winding diameter, the smaller the pi For this reason, a large amount of sloping unused portions are generated at the ends where they are cut and are discarded, resulting in a lot of waste and poor yield. It has also been pointed out that when a polygonal drum is used, it is necessary to prepare various kinds of drums in advance so that one side of the drum has the length to be cut.

[0011] Such a point has been pointed out in the conventional example. The present invention has been made in view of the above-mentioned circumstances in order to solve the problems of the conventional example. However, in claims 2 and 4, the process from applying adhesive to stacking can be carried out continuously and automatically by applying a pressing force to the folding target portion identified after the fact and folding and stacking. Second, it prevents pitch misalignment, curling, etc., third, yield is good, and fourth, the adhesive can be applied appropriately in the width direction or longitudinal direction of the base material. The purpose of this invention is to propose a method for manufacturing a honeycomb core that can be freely realized regardless of whether the material is metal or non-metal.

0012

[Means for Solving the Problems] The technical means of the present invention to achieve this object are as follows. Claim 1 is as follows. In other words, in this method of manufacturing a honeycomb core, first, adhesive is applied to one side of a strip-shaped base material in the form of stripes at a predetermined pitch along the width direction, over a constant length in the longitudinal direction of the base material, and over the same constant length. Apply repeatedly at intervals. Next, the adhesive is applied to the other surface of the base material in the form of lines along the width direction at the same predetermined pitch as above, at positions corresponding to each of the above-mentioned intervals.

Claim 2 is as follows. That is, in this method for manufacturing a honeycomb core, after the step according to claim 1, first, at each boundary portion between the adhesive applied to one side of the base material and the adhesive applied to the other side, the width is At a position shifted by 1/4 pitch from the above predetermined pitch along the direction,
Each approximately linear bending target location is identified. Next, the base material is guided between a pair of moving rollers, and while being guided and further fed by the moving rollers that reciprocate left and right by approximately the above-mentioned fixed length, at least a pressing force is applied to the above-mentioned bending target portion. The method includes a step of continuously folding and stacking the base materials in a jagged manner at intervals of the predetermined length.

Claim 3 is as follows. In other words, in this method of manufacturing a honeycomb core, first, adhesive is applied to one side of a strip-shaped base material in the form of stripes at a predetermined pitch along the longitudinal direction, over a fixed length in the longitudinal direction, and at intervals of the same fixed length. and apply repeatedly. Next, apply the adhesive to the other side of the base material in a linear manner at the same predetermined pitch in a positional relationship that is shifted by half a pitch from the above along the longitudinal direction, and apply the adhesive to the positions corresponding to each of the above-mentioned intervals. The process of applying
It has.

Claim 4 is as follows. That is, in this method for manufacturing a honeycomb core, after the step according to claim 3, first, each boundary portion between the adhesive applied to one side of the base material and the adhesive applied to the other side is divided into widths. It is specified as a substantially linear bending point along the direction. Next, the base material is guided between a pair of moving rollers, and while being guided and further fed by the moving rollers that reciprocate left and right by approximately the above-mentioned fixed length, at least a pressing force is applied to the above-mentioned bending target portion. The method includes a step of continuously folding and stacking the base materials in a jagged manner at intervals of the predetermined length.

[0016]

[Operation] Since the present invention is comprised of such means, it operates as follows. In this method for manufacturing a honeycomb core, adhesive is first applied repeatedly at regular intervals on both sides of a strip-shaped base material, and the adhesive is applied in the width direction in the first aspect and in the longitudinal direction in the third aspect. Then, in claim 2, after the application step of claim 1, and in claim 4, after the application step of claim 3, the bending target locations are identified at each boundary portion of the adhesive on both sides of the base material, and the moving roller While guiding and feeding the base material, at least a pressing force is applied to the part to be folded, and the base material is bent and folded at regular length intervals and stacked in a block shape. Thereafter, a honeycomb core is manufactured by heating and pressurizing, stacking and bonding, cutting both ends, and then applying a tensile force in the stacking direction to expand. Therefore, this manufacturing method is as follows.

First, the application of the adhesive to the base material can be easily automated using a coating device equipped with a print roll, and the location where the base material is to be bent can be identified and the pressing force applied while guiding it with a moving roller. Adding, folding, and stacking can be easily automated with equipment, and the conveyance of the base materials during that time can also be easily automated. In this way, the process from adhesive application to stacking can be carried out continuously and automatically using a series of devices.

[0018] Secondly, the application and stacking of adhesives can be done without manual work, and it is easy to deal with the expansion and contraction of the base material, and there is no problem even when the base material is opaque. In particular, when piled up, the linear adhesive becomes in a positional relationship that is accurately shifted by half a pitch, thereby preventing pitch shift. Furthermore, since the base material is not wound up on a drum, pitch deviation is prevented from this aspect as well, curling curls and rounding are also prevented, and there is no problem in handling during subsequent expansion.

Thirdly, since the base material is not wound around a drum, there is no sloping unused portion at the end, which is a post-cutting point, and the yield is good.

Fourthly, these can be realized arbitrarily and freely by applying an adhesive to the strip-shaped base material along the width direction or length direction as appropriate. Furthermore, regardless of whether the base material used is metal or non-metal,
It is widely applicable.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained in detail below based on embodiments shown in the drawings. FIG. 1 is a front explanatory view of the coating process and other parts for explaining an embodiment of the method for manufacturing a honeycomb core according to the present invention. First, to explain along Figure 1, 1
is an unwinder, and a band-shaped base material A is wound around this unwinder 1. As the base material A, a strip-shaped aluminum foil or other metal foil, a strip-shaped aramid paper, a vinyl chloride sheet, paper, or other thin film-shaped nonmetallic material is used. 2 is a holding portion of the unwinder 1. Then, the base material A fed out from the unwinder 1 passes through the guide roll 3 to a group of infeed rolls 4, where appropriate tension is applied, and then passes through the guide roll 3 to the edge control device 5, where the base material is shaped into a strip. The horizontal position of A is adjusted so that its center line coincides with the center of the control roll 6 and other parts. The base material A is then sent to the punching roll section 7, and punch holes (not shown) are formed in a row along the side edge of the base material A by the punching roll 8 or the like. , is used for positioning the base material A, and also functions to prevent pitch deviation, which will be described later.

Thereafter, the substrate A is guided to the first coating device 9. In the first coating device 9, the adhesive B in the tray 10 is coated onto the base material A in a predetermined manner by a print roll 11 that is rotated in one direction. 12 is a backup roll, and the backup roll 12 is the print roll 11
and sandwich the base material A therebetween. Figure 3 shows such a first
The main parts of the coating device 9 are shown, (1) is a left side view, (2)
The figure is a front view, and figure (3) is a right side view. In the figure, reference numeral 13 indicates a large number of coating protrusions formed on the surface of the print roll 11, and in the illustrated example, the coating protrusions 13 are
1 along the width direction, and the adhesive B is applied to the base material A by such application protrusions 13. Note that the shape of the linear application portion of the print roll 11 may be in the form of a groove.

Now, in this first coating device 9, the adhesive B is coated on the base material A in the following manner. FIG. 4 is a plan view of essential parts showing an example of applying the adhesive B to the base material A. In the example of FIG. 4, the adhesive B is applied to one side A1, such as the front surface, of the strip-shaped base material A in the form of stripes at a predetermined pitch P and a predetermined width along the width direction C, as shown by the solid line in the figure. The coating is repeatedly applied over a constant length in the longitudinal direction D perpendicular to the width direction C of the base material A at intervals E of the same constant length. Next, FIG. 5 is a plan view of essential parts showing another example of application of adhesive B to base material A. In the example of FIG. 5, the adhesive B is applied to one side A1, such as the front surface, of a strip-shaped base material A in the form of stripes at a predetermined pitch P and a predetermined width along the longitudinal direction D, as shown by the solid line in the figure. The coating is repeatedly applied over a constant length in the longitudinal direction D at intervals E of the same constant length.

Now, the base material A coated with the adhesive B in a predetermined manner in the first coating device 9 in this way is immediately guided to the guide roll 3 and brought to the drying device 14 where it is once dried. It is conveyed to the second coating device 15 via the guide roll 3. The second coating device 15 has the same configuration as the first coating device 9 described above, and includes a tray 10, a print roll 11, a backup roll 12, etc. as shown in FIG. Mechanical control or electrical control using a drive gear or the like is performed so that the base material A, which is transported in synchronization with, is driven at a predetermined timing. In this second coating device 15,
Adhesive B is applied as follows.

That is, first, as in the example shown in FIG. 4, when the adhesive B is applied by the first application device 9 to one side A1 of the base material A in the width direction C at a distance E,
It becomes as follows. In this case, as indicated by the broken line in FIG.
It is applied linearly along the width direction C at the same predetermined pitch P to positions corresponding to each interval E based on the above-mentioned synchronous interlock control. Next, as in the example shown in FIG. 5, if the adhesive B is applied by the first application device 9 to one side A1 of the base material A at a distance E in the longitudinal direction D instead of the width direction C. becomes as follows. In this case, as indicated by the broken line in FIG. 5, the adhesive B on the other surface A2, such as the back surface, of the base material A is shifted by half a pitch from the adhesive B on the one surface A1 along the longitudinal direction D. Based on the positional relationship, it is applied linearly at the same predetermined pitch P to positions corresponding to each interval E based on the above-mentioned synchronous interlock control. In this way, the base material A coated with the adhesive B in a predetermined manner by the second coating device 15 is immediately guided by the guide roll 3 and conveyed again to the drying device 14 to be dried. In the illustrated example, the drying device 14 corresponding to the first coating device 9 and the drying device 14 corresponding to the second coating device 15 are common, and the overall device is made more compact. Regardless of the example shown, separate drying devices, that is, two drying devices, may be used.

[0026] After that, the base material A is guided by the guide rolls 3 and goes to the next step. FIG. 2 is a front explanatory view of the stacking process, etc., used to explain this embodiment. Below this figure 2
16 is a crease setting device, and the crease setting device 16 specifies the bending target portion F (see FIGS. 4 and 5) of the base material A. In the illustrated example, this crease setting device 16 uses upper and lower rolls 19 and 20 provided with a pair of intermittent protrusions 17 and grooves 18 in the width direction C, and also includes the above-mentioned first applicator 9 and Mechanical control or electrical control is performed so that the base material A, which is transported in synchronization with the second coating device 15, is driven at a predetermined timing. The upper and lower rolls 19 of such a crease setting device 16,
By passing the base material A while being sandwiched between the
The bending target portion F is formed, for example, in the form of a perforation as follows. That is, when the adhesive B is first applied in the width direction C as in the example of FIG. 4, the adhesive B applied to one side A1 of the base material A and the adhesive B applied to the other side A2.
As shown by imaginary lines in the figure, at each boundary part, the bending point F is approximately linear, for example, perforated, at a position shifted by 1/4 pitch from the predetermined pitch P along the width direction C. It is formed. Note that the setting of the 1/4 pitch is performed with reference to the center line of the width of the applied adhesive B. Next, when the adhesive B is applied in the longitudinal direction D as in the example of FIG. 5, the adhesive B applied to one side A1 of the base material A and the adhesive B applied to the other side A2 As indicated by imaginary lines in the figure, bending target locations F along the width direction C are formed in a substantially linear shape, for example, a perforation shape, at each boundary portion of the cross section.

Now, the base material A on which the adhesive B has been applied and the bending target portion F has been specified in this manner is conveyed to the next stacking device 21. In addition, as for the entire device, the base material A
starts from the state where it is conveyed to at least this position and extended. Now, in the piling device 21, the base material A is first reversely conveyed by a group of rollers 22 arranged in three vertical rows, for example, and then guided between a pair of moving rollers 23. The moving rollers 23 form a left and right pair with a predetermined interval, and reciprocate left and right from the position indicated by the solid line in the figure to the position indicated by the broken line for approximately the above-mentioned fixed length, that is, the length between the bending target points F. It is designed to move. Further, the reciprocating motion of the moving roller 23 corresponds to the feed amount of the base material A, and is configured to move forward or backward once while the base material A is fed from the roller group 22 by the above-mentioned fixed length.

Therefore, the base material A is
3, while being further fed, at least a pressing force is applied to the bending target point F, so that the sheets are continuously bent at the above-mentioned constant length, folded into a jagged shape, and piled up. That is, in the illustrated example, the base material A guided and fed by the moving roller 23 is moved by the pressing pieces 2 arranged on both the left and right sides and driven intermittently.
4, the bending target point F is pressed from the outside, and then placed directly under the left and right pressing pieces 24, respectively, and rotated, for example, in three layers, so that the pitch is gradually narrowed and formed into an acute angle. By sequentially inserting the left and right bending points F with the spiral roller-shaped bending member 25,
Folded and stacked. In this way, the base material A
is continuously reversed and folded at intervals of a certain length, and is successively folded into a zigzag shape in which the left and right folds coincide at the top and bottom, and the top and bottom are closely spaced. In the illustrated example, the particles are discharged onto the lifter 27 by the conveyor 26, and stacked on the lifter 27 in a substantially block shape. Note that the lifter 27 may be placed at the position of the conveyor 26 without using the conveyor 26, and the base materials A may be stacked directly on top of the lifter 27, regardless of the illustrated example. In the figure, 28 is a static electricity generation prevention device, which is used when the base material A is non-metallic, but is unnecessary when the base material A is made of metal foil.

[0029] The method for manufacturing a honeycomb core according to the present invention includes:
It is as above. Therefore, it becomes as follows.

In this method of manufacturing a honeycomb core, adhesive B is first repeatedly applied to both one side A1 and the other side A2 of a strip-shaped base material A at intervals E of a constant length, and as shown in FIG.
In the example shown in FIG. 5, the coating is applied in the width direction C, and in the example shown in FIG. 5, it is applied in the longitudinal direction D. Then, bending target points F are identified at each boundary of the adhesive B on both sides of the base material A, and while the base material A is guided and fed by the moving roller 23, the pressing piece 24 and the bending member At step 25, a pressing force is applied, and the pieces are bent and folded at intervals of a certain length, and piled up in a block shape. After that, the adhesive B was heated and pressurized to the melting point temperature to adhere in piles, cut both ends along the pile direction, and then expand by applying a tensile force in the pile direction, as shown in Figure 6. Honeycomb core G is now manufactured. That is, as shown in the plan view of the main part in FIG. The base material A is expanded by the following methods. Since the honeycomb core G is manufactured in this way, the following first, second, third, and fourth methods are used.

First, the application of the adhesive B to the substrate A can be easily automated by the first application device 9 and the second application device 15, each of which is equipped with a print roll 11. Also, base material A
For example, the crease setting device 16 and the stacking device 21 can easily specify the folding target point F continuously, and apply pressing force while guiding with the moving roller 23 to continuously fold and stack the folding device. Instrumentalized and automated. Furthermore, the conveyance of the base material A during that time can be easily automated using the guide rolls 3 and the like. In this manner, in this method for manufacturing honeycomb core G, the steps from applying adhesive B to base material A to stacking base material A can be carried out continuously and automatically using a series of devices.

Secondly, in this manufacturing method, the application of the adhesive B and the stacking of the base material A can be performed without manual work, and since they are not performed manually, the expansion and contraction of the base material A can be controlled mechanically. In addition, there is no problem even if the base material A is opaque, and since the stacking device 21 can be used, the linear adhesive B can be accurately shifted by half a pitch during stacking. Therefore, pitch deviation is prevented. In addition, since the base material A is not wound around the drum as in the conventional example, pitch deviation is prevented from this aspect as well, and the curling and rounding of the base material A is also prevented, which will hinder handling during subsequent expansion. will not occur.

Thirdly, similarly, in this manufacturing method, the base material A is not wound around a drum as in the conventional example, so there is no sloping unused portion at the end where it is cut after the fact, and the yield rate is reduced. Honeycomb core G is often manufactured from base material A.

Fourthly, these can be realized arbitrarily and freely by applying the adhesive B to the strip-shaped base material A along the width direction C or the longitudinal direction D as appropriate. In other words, in the conventional manufacturing method of honeycomb core G, it was often necessary to apply the adhesive B in either the width direction C or the longitudinal direction D depending on the application.
According to this manufacturing method, there are no such restrictions and coating can be performed freely. Moreover, in this manufacturing method, the base material A used can be widely applied regardless of whether it is a metal foil such as aluminum foil or a non-metal such as aramid paper, PVC sheet, or paper. be.

[0035]

Effects of the Invention As explained above, in the method for manufacturing a honeycomb core according to the present invention, first, in claims 1 and 3, an adhesive is sequentially applied to both sides of a base material in a predetermined manner; In claim 4, by further applying a pressing force to the folding target portion specified after the fact and folding and stacking,
Demonstrates the following effects.

First, the steps from adhesive application to stacking can be carried out continuously and automatically using a series of devices, which significantly improves production efficiency. In other words, in the manufacturing method for honeycomb cores, it is now possible to perform everything from adhesive application to stacking in an integrated and continuous manner using a series of integrated equipment, which significantly shortens the time required and saves work space compared to conventional methods. The production efficiency is significantly improved and the cost is also excellent, as the amount of waste is greatly reduced and the work is made easier.

Second, pitch deviations, curling curls, etc. are also prevented, and a high quality and highly accurate honeycomb core can be stably obtained. In other words, stacking can now be done without manual work, it is easy to deal with the expansion and contraction of the base material, there is no problem even when the base material is opaque, and it is possible to stack the base material without having to do it manually. Since the honeycomb core is not wound around a drum, pitch deviations and winding curls are reliably prevented, and a honeycomb core with a uniform cell shape can be easily obtained.

Thirdly, the yield is good, and from this point of view as well, it is excellent in terms of cost. In other words, since the base material is not wound around the drum as in the conventional case, there is no sloping unused part at the end where it is cut after the fact, and there is no waste of waste, and it is not necessary to prepare various drums in advance. It is excellent in terms of cost.

Fourthly, in these cases, the adhesive is appropriately applied to the strip-shaped base material along the width direction in claims 1 and 2, and in the longitudinal direction in claims 3 and 4. By applying along the direction, it can be realized arbitrarily and freely. Furthermore, the base material used can be widely applied regardless of whether it is metal or non-metal.

[0040] As described above, the effects of the present invention are remarkable, such as eliminating the problems that existed in this type of conventional example.

[Brief explanation of the drawing]

FIG. 1 is a front explanatory view of the coating process and other parts for explaining an embodiment of the method for manufacturing a honeycomb core according to the present invention.

FIG. 2 is a front explanatory view of the stacking process, etc., for explaining the same embodiment.

FIG. 3 shows main parts of the first and second coating devices, in which (1) is a left side view, (2) is a front view, and (3) is a right side view.

FIG. 4 is a plan view of essential parts showing an example of applying an adhesive to a base material.

FIG. 5 is a plan view of essential parts showing another example of applying adhesive to a base material.

FIG. 6 is a plan view of essential parts of the honeycomb core.

[Explanation of symbols]

A Base material A1 One side A2 Other side B Adhesive C Width direction D Longitudinal direction E Interval F　　　　　Point to be bent 23 Moving roller

Claims (4)

[Claims] [Claim 1] Adhesive is applied to one side of a strip-shaped base material,
Linearly at a predetermined pitch along the width direction, extending over a certain length in the longitudinal direction of the base material and leaving intervals of the same certain length,
Repeatedly applying the adhesive, and then applying the adhesive to the other side of the base material in a line shape at the same predetermined pitch as above along the width direction, at positions corresponding to each of the above-mentioned intervals. A method for manufacturing a honeycomb core characterized by: 2. After the step according to claim 1, at each boundary portion between the adhesive applied to one side of the base material and the adhesive applied to the other side, the predetermined amount is applied along the width direction. Each approximately linear bending target location is identified at a position shifted by 1/4 pitch, and then the base material is guided between a pair of moving rollers and reciprocated left and right by approximately the above-mentioned fixed length. A step of applying at least a pressing force to the bending target portion while being guided and further fed by the moving roller, thereby continuously folding and stacking the base material in a jagged shape at each of the predetermined lengths. A method for manufacturing a honeycomb core, comprising: [Claim 3] Adhesive is applied to one side of the strip-shaped base material,
The adhesive is repeatedly applied in a line shape at a predetermined pitch along the longitudinal direction over a fixed length in the longitudinal direction and at intervals of the same fixed length, and then the adhesive is applied to the other side of the base material along the longitudinal direction. A honeycomb core characterized by comprising the step of applying the coating in a linear manner at the same predetermined pitch to the positions corresponding to each of the above-mentioned intervals based on the positional relationship shifted by half a pitch from the above-mentioned one along the direction. Production method. 4. After the step according to claim 3, each boundary portion between the adhesive coated on one side of the base material and the adhesive coated on the other side is separated approximately along the width direction. The base material is identified as a linear bending point, and then the base material is guided between a pair of moving rollers, and while being guided and further fed by the moving rollers that reciprocate left and right by approximately the above-mentioned fixed length, the above-mentioned bending is performed. A honeycomb core characterized by comprising the step of applying at least a pressing force to a target location, thereby continuously folding and stacking the base materials in a jagged shape at intervals of the above-mentioned constant length. manufacturing method.