JP3205471B2 - Manufacturing method of honeycomb core - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[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, wherein a honeycomb core is obtained by stacking and bonding a plurality of corrugated sheets.

[0002]

2. Description of the Related Art A honeycomb core of this kind is cut at predetermined lengths while conveying a strip-shaped corrugated sheet prepared in advance, and an adhesive is applied to a trough or a top of a corrugation with a coating roll. After being dried while being continuously conveyed, a plurality of such corrugated sheets are stacked and heated and pressed to adhere to each other. In the corrugated plate, the corrugations are continuously bent in the longitudinal direction, which is the front-back direction of the wave, so that the valley portion and the top line portion of the wave are in the left and right lateral directions of the wave. It is formed along the short direction. And in such a honeycomb core manufacturing method, conventionally, by arranging the longitudinal direction, which is the longitudinal direction of the wave of the corrugated sheet, toward the transport direction, along the longitudinal direction, which is the longitudinal direction of the wave, While being transported, the above-described processing such as application and drying of the adhesive has been performed.

[0003]

The following problems have been pointed out in such a conventional example. First, in the conventional manufacturing method, as described above, each process is performed while the corrugated sheet is transported in the longitudinal direction before and after the wave.
Therefore, when a line is formed, problems have been pointed out in terms of space, such as the entire production line becoming extremely long.

Second, since the adhesive is applied while the corrugated sheet is transported in the longitudinal direction before and after the wave, unevenness in application of the adhesive and run-out are likely to occur. In other words, the adhesive is applied by an application roll whose axis is arranged at right angles to the transport direction. However, in the conventional manufacturing method, the stripes such as the lower surface of the valley and the upper surface of the top of the corrugated sheet to be applied are formed. , Since they were arranged in a direction perpendicular to the transport direction, the application direction and the object to be applied crossed each other, making it difficult for the contact between the application roll and the striated line to be completely smooth, intermittent and instantaneous. Due to the possibility of inconsistency, uneven application of the adhesive was likely to occur. Furthermore, since the applied adhesive has fluidity before drying, it is easy to flow out from the striated portions such as the lower surface of the valley and the upper surface of the top of the corrugated sheet to be applied to the other. Due to these factors, poor adhesion is likely to occur between the stacked corrugated sheets, the adhesive force between them is insufficient, and the manufactured honeycomb core may cause anxiety in the adhesive strength of the cell wall, which may cause a problem. Had become.

Third, the application of the adhesive to the corrugated sheet is often performed on both the lower surface of the valley and the upper surface of the top of the corrugated sheet, but this cannot be performed at once. That is, in the conventional manufacturing method, since the adhesive is applied while the corrugated sheet is transported in the longitudinal direction before and after the wave, if the adhesive is applied to both the lower surface of the valley and the upper surface of the top of the corrugated sheet at the same time. This makes it difficult to convey the film, especially on the lower side of the valley. Therefore, in such a case, it has been pointed out that the adhesive has conventionally been applied with a time lag, which is troublesome and has a low efficiency of labor.

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. The valleys and the ridges formed at the top formed along the lateral direction are transported in a state of being arranged in the transport direction, and the respective processes are performed continuously. Honeycomb, which shortens the line, secondly, prevents uneven application and outflow of the adhesive, and thirdly, makes it possible to apply the adhesive to both the lower surface of the valley and the upper surface of the top of the corrugated sheet at a time. An object is to propose a method of manufacturing a core.

[0007]

The technical means of the present invention for achieving this object is as follows. First, claim 1
Is as follows. That is, in this method for manufacturing a honeycomb core, first, a plurality of corrugated sheets in which corrugations are continuously bent are prepared, and then, while the corrugated sheets are sequentially conveyed one by one, After applying the adhesive with a coating roll to the valley and the top line, the coating is dried while continuing to be conveyed, and then a plurality of the corrugated sheets further conveyed, the valley and the top are combined vertically. Stacked and heated and pressed to adhere,
Thus, a honeycomb core, which is a planar assembly of hollow columnar cells, is obtained. In the corrugated plate, the corrugations are continuously bent in the longitudinal direction, which is the front-back direction of the wave, so that the valley portion and the top line portion of the wave are in the left and right lateral directions of the wave. It is formed along the short direction. Each of the above-described conveyances of the corrugated sheet is sandwiched from above and below by a rotating top member, and the longitudinal direction that is the front-back direction of the wave of the corrugated sheet is perpendicular to the conveying direction. Is arranged along the short side direction, which is the left and right lateral direction of the wave. Thus, the corrugated sheet is formed along the short side direction that is the left and right lateral direction of the wave, the valley and the top line of the wave are conveyed in a state of being aligned along the conveyance direction, It is characterized by.

Next, claim 2 is as follows. That is, in this manufacturing method, in the method for manufacturing a honeycomb core according to the first aspect, when a plurality of the corrugated sheets are stacked and bonded together with the valleys and the tops vertically, a flat plate is interposed. It becomes.

[0009]

The present invention comprises the above-mentioned means, and operates as follows. In this manufacturing method, while the corrugated sheet is sequentially conveyed one by one, an adhesive is applied to a valley portion or a top line portion of the corrugation and dried, and then the plurality of sheets are stacked and bonded to form a honeycomb core. Manufactured. In claim 2, a flat plate is interposed between such corrugated plates. In this manufacturing method, the corrugated sheet is sandwiched from above and below by the rotating top member, and the ridges and tops of the waves formed along the left and right lateral directions of the waves are moved in the transport direction. Each process such as application and drying of an adhesive is continuously performed while being transported in a state of being lined up along.

Therefore, in this manufacturing method, firstly, the valleys and tops formed in the left and right lateral directions of the corrugated sheet are conveyed in a state of being lined up along the conveying direction. In such a case, the entire production line is shortened. Second, the valleys and top lines formed in the left and right lateral directions of the corrugated sheet are:
The adhesive is applied while being transported side by side in the transport direction, so the contact with the application roll is smooth and the adhesive is applied without difficulty, preventing uneven coating and applying the adhesive. The flowing out of the adhesive is also prevented.
Third, the application of the adhesive to the corrugated sheet is often performed on both the valley bottom surface and the top surface of the corrugated sheet, but the corrugated sheet is formed in the lateral direction while being sandwiched by the top members. Since the striped valleys and ridges are transported along the transport direction, the adhesive can be applied to both of them at once.

[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. The drawings are provided for explanation of the embodiments of the present invention, and FIG.
Is a schematic plan view of a subsequent stacking process and the like, FIG. 3 is a schematic side view of an adhesive application process and the like, and FIG. 4 is a schematic side view of a subsequent stacking process and the like. FIG. 5 is a schematic front view of a main part of a top member and the like, FIG. 6A is a front view of a main part of an example of a manufactured honeycomb core, and FIG. It is a perspective view of the important section of other examples of the honeycomb core which was made.

In the method of manufacturing the honeycomb core 1, first, a plurality of corrugated sheets 2 in which corrugations are continuously bent are prepared, and then the corrugated sheets 2 are sequentially conveyed one by one. After applying the adhesive 4 to the valleys and ridges of the waves with the application rolls 3, the valleys and the ridges are vertically combined while being further transported and then dried. Thus, the honeycomb core 1 is formed as a planar assembly of hollow columnar cells 5.

Regarding such a manufacturing method and a manufacturing apparatus,
Further details will be described. First, the corrugated sheet 2 is made of aluminum foil, other metal foil, aramid paper, other special paper, PVC sheet, other plastic sheet, fiber reinforced plastic sheet (FRP sheet), or other various materials. The flat base material sheet is supplied to a corrugating apparatus equipped with gears, racks, and the like to be formed. This corrugated sheet 2
In addition to the substantially trapezoidal cross-section, a triangular shape, a substantially square shape, and other various shapes can be considered. Such irregularities of the waveform are continuously formed in the longitudinal direction L and the front-rear direction at a predetermined pitch and height. It is bent. A large number of the corrugated sheets 2 thus prepared are stacked on the lifter 6 as shown in FIG. In this manner, the corrugated plate 2 is formed such that the corrugations are continuously bent in the longitudinal direction L, which is the front-back direction of the wave, so that the valleys and crests of the wave are left and right. It is formed along a lateral direction S which is a lateral direction.

Then, one of the plurality of corrugated sheets 2 stacked one above the other is adsorbed by the suction pad 7 of the vacuum device shown in FIG. 3, for example. Is done. That is, the suction pad 7 moves down, sucks, rises,
By performing the operations of moving, lowering, and releasing suction, the corrugated sheets 2 are sequentially supplied one by one onto the conveyor 8. Then, via the conveyor 8, as shown in FIGS. 1 and 3,
A group of conveying top members 9 (described in detail later) are used to
Supplied to. 11 is a tray of the coating device 10,
The adhesive 4 in the tray 11 is applied to a predetermined portion of the corrugated sheet 2 via the rotating pickup roll 12, the interposed roll 13, the application roll 3, and the like. In other words, the adhesive 4 is applied by the application roll 3 to the corrugated portions of the corrugated plate 2 in the short direction S, such as the lower surface of the wave valley and the upper surface of the crest. In the illustrated example, the adhesive 4 is applied to the stripes on both the lower surface and the upper surface of the wave valley by the upper and lower application rolls 3. In addition, regardless of the illustrated example, the adhesive 4 may be applied only to one of the ridges on the lower surface of the wave and the upper surface of the top of the wave. It may be applied in a spot form.

Thereafter, the corrugated sheet 2 to which the adhesive 4 has been applied in this way is again conveyed by the group of conveying top members 9,
As shown in FIGS. 1 and 2 and FIGS. 3 and 4,
It passes through the drying device 14. And corrugated sheet 2 is a lamp,
The applied adhesive 4 is dried by passing through a drying device 14 provided with a heat source such as a hot air source and a steam pipe while being conveyed by a group of top members 9.

The corrugated sheet 2 on which the adhesive 4 has been dried in this way
Are further conveyed by a group of top members 9 and, as shown in FIG. 2 and FIG. Longitudinal direction L
, And the ends are cut by the attached cutter 16 so that the dimensions in the longitudinal direction L are made uniform. Then, as shown in FIG. 4, after the corrugated sheet 2 is conveyed to the conveyor 8, the suction pad 7 performs each operation of descending, adsorbing, ascending, moving, descending, and adsorbing, so that the base plate is moved. It is supplied to a stacker 18 on 17. Then, the corrugated sheet 2 is put into the stacking device 18. Since the corrugated sheet 2 is sequentially shifted by the half pitch of the wave as described above, a large number of the corrugated sheets 2 are placed under the positional relationship where the valleys and the tops are vertically aligned. The sheets are stacked one on top of the other in a laminated block shape with space.

By the way, in the illustrated example, in such a stacking, as shown in FIGS. 2 and 4, a flat plate 19 which is a separately prepared flat base material sheet is interposed between the corrugated plates 2 respectively. Is done. That is, a large number of the flat plates 19 are stacked on the lifter 6 in advance, and the uppermost one of the flat plates 19 is stacked by the operations of lowering, sucking, rising, moving, lowering, and releasing the suction pad 7. To the stacking device 18. Then, each time the corrugated sheet 2 is supplied into the stacking device 18 one by one as described above, the flat plate 19 is supplied into the stacking device 18 one by one at a time. Accordingly, the corrugated sheets 2 in the illustrated example are sequentially stacked in a positional relationship in which the valleys and the tops of the corrugated sheets 2 are interposed via the flat plate 19 in which the valleys and the tops are interposed.

It is to be noted that the corrugated sheet 2 having the adhesive 4 applied to the lower surface of the valley and the upper surface of the top as described above, and the corrugated sheet 2 which is separately prepared and to which the adhesive 4 is not applied, are not based on the illustrated example. May be sequentially stacked in the stacking device 18 while matching the valley portion and the top portion. Further, regardless of the illustrated example, the adhesive 4 is applied to only one of the lower surface of the valley and the upper surface of the top of the corrugated sheet 2, and the corrugated sheet 2 coated with the adhesive 4 is placed in the stacking device 18. May be sequentially stacked.

In any case, the corrugated sheets 2 (in the illustrated example, each corrugated sheet 2 on which the flat plate 19 is interposed) stacked in the form of a laminated block having a space as a whole, The adhesive 4 is heated and pressed at the melting point of the adhesive 4 in a furnace or the like. As a result, the adhesive 4 is melt-hardened, so that each of the stacked corrugated sheets 2 is formed.
The gap between the corrugated plates 2 and the flat plate 19 in the illustrated example is bonded.

In this manufacturing method, the corrugated plate 2 and the flat plate 19 are used as the cell walls 20 in this manner, and the honeycomb core is a planar assembly of a large number of hollow column-shaped cells 5 partitioned into independent spaces. 1 is manufactured. FIG. 6A shows a corrugated plate 2 and a flat plate 19 according to FIGS.
Is shown as the cell wall 20, and FIG. 6B shows the honeycomb core 1 manufactured using only the corrugated sheet 2 as the cell wall 20. By the way, the cross-sectional shape of the cell wall 20 and the cell 5 of the honeycomb core 1 manufactured as described above can be a trapezoidal shape, a regular hexagonal shape shown in FIG. . And the honeycomb core 1
It is known for its excellent properties such as excellent weight ratio, light weight, high rigidity and strength, excellent rectification effect, flatness, heat insulation, sound insulation, and large surface area per unit volume. ing.

In the method of manufacturing the honeycomb core 1 as described above, each of the corrugated sheets 2 is sequentially conveyed by vertically holding the corrugated sheet 2 with the rotating top member 9 while simultaneously holding the corrugated sheet 2. This is performed in a state where valleys and ridges formed along the short side direction S, which is the horizontal direction of the wave, are arranged along the transport direction C.

The method of transporting the corrugated sheet 2 will be described in more detail. First, the top member 9 composed of a roller is shown in FIG.
As shown in FIG. 2, a large number are mounted on the shaft 21 at predetermined intervals, and each is rotated by the shaft 21. The shafts 21 provided with a large number of the top members 9 form an upper and lower pair, and their axes are oriented at right angles to the transport direction C, and are arranged in a row at predetermined intervals in the transport direction C. I have. That is, such a shaft 21
The group of top members 9 attached to the
As shown in FIG. 4, a coating device 10 for applying the adhesive 4 from a conveyor 8 attached to a lifter 6 for stacking the corrugated sheets 2,
The corrugated sheet 2 is provided to the drying device 14, the table 15, and the like, and is conveyed to the stacking device 18.

As shown in FIG. 5, the upper group of top members 9 abuts on the upper surface of the valley of the corrugated sheet 2, and the lower group of members 9 abuts on the lower surface of the top of the corrugated sheet 2. In order to make contact, the diameter, the thickness, the interval between them, and the like are set. That is,
Since the adhesive 4 is applied to the lower surface of the valley and the upper surface of the top of the corrugated plate 2, the upper surface of the valley and the lower surface of the top which are not in contact with the adhesive are respectively abutted. The upper and lower frame members 9 are arranged in such a positional relationship and are rotated by the shaft 21 to convey the corrugated sheet 2 in the conveying direction C while holding the corrugated sheet 2 from above and below.

By the way, the corrugated sheet 2 is provided with such a top member 9.
While being transported in groups, as shown in FIG. 1 and FIG. 2, they are arranged in a direction perpendicular to the transport direction C with the longitudinal direction L being the front-back direction of the wave, and It is transported along the hand direction S. That is, after the corrugated sheet 2 is positioned in such a direction on the lifter 6, the corrugated sheet 2 is conveyed by the group of top members 9 via the suction pad 7 and the conveyor 8 while being oriented in the same direction. The corrugated sheet 2 forms the valleys and peaks formed along the transverse / transverse direction S of the wave as the transport direction C, that is,
After the adhesive 4 is applied by the application roll 3 of the application device 10 and the adhesive 4 is dried by the drying device 14 while being conveyed by the group of top members 9 in a state of being arranged in the conveyance direction C,
It is shifted on the table 15 by a half pitch of the wave and the end is cut by the cutter 16 and supplied to the stacking device 18.

The method for manufacturing the honeycomb core 1 according to the present invention is as described above. Then, it becomes as follows. In the method of manufacturing the honeycomb core 1, a plurality of corrugated sheets 2 prepared in advance are sequentially conveyed one by one, and the adhesive 4 is applied to a valley portion or a top line portion of the corrugation and dried. The honeycomb core 1 is manufactured by sequentially shifting the upper and lower portions by a half pitch of the wave, stacking and bonding the valley portion and the top portion together. In this manufacturing method, the corrugated sheet 2 is sandwiched from above and below by a group of rotating top members 9, and while the transverse and lateral directions S on the left and right sides of the wave are transported as the transport direction C,
Application of the adhesive 4 by the application roll 3 of the application device 10,
Each processing such as drying by the drying device 14 is continuously performed,
The stacking device 18 is to be stacked. Therefore, according to the method for manufacturing the honeycomb core 1, the following first, second, and third processes are performed.

First, in this manufacturing method, the corrugated sheet 2
Each processing is performed and stacked, while being conveyed in the lateral and lateral directions S on the left and right sides of the wave, and arranged in a direction perpendicular to the conveying direction C and in a direction perpendicular to the conveying direction C. As described above, the corrugated sheet 2 is conveyed in a state where the valleys and ridges formed along the lateral and lateral directions S are arranged along the conveying direction C, so that the entire corrugated sheet 2 is conveyed. When processing is made into a line, the production line becomes shorter. That is, as in the above-described conventional example, the corrugated sheet 2
Compared with the case where the longitudinal direction L before and after the wave is transported as the transport direction C, the entire manufacturing line is greatly shortened.

Second, in this manufacturing method, the corrugated sheet 2
A valley formed along the transverse and transverse direction S while being transported in the transverse and transverse directions S on the left and right sides of the wave, arranged in a direction perpendicular to the transport direction C and oriented in the transverse and transverse directions S of the wave. The adhesive 4 is applied while being conveyed in a state where the ridges and the ridges are arranged along the conveyance direction C. That is, the coating roll 3 of the coating device 10 whose axis is arranged at right angles to the transport direction C causes the corrugated plate 2 to be aligned along the transport direction C with respect to the striations such as the lower surface of the valley and the upper surface of the top. The adhesive 4 is applied.
Therefore, the application direction and the object to be applied are parallel to each other, the contact between the application roll 3 and the striated portion is linearly and continuously performed smoothly, and the adhesive 4 is gradually applied without difficulty. As a result, the adhesive 4 is uniformly applied to prevent unevenness of application, and the applied adhesive 4 which is still undried and has fluidity is applied.
It is also prevented from flowing out. As described above, the uneven coating and the outflow, which have been pointed out in the above-mentioned conventional example, are surely prevented.

Third, the application of the adhesive 4 to the corrugated plate 2 is often performed on both the lower surface of the valley and the upper surface of the top of the corrugated plate 2. A state in which ridges and ridges formed along the left and right lateral and lateral directions S of the wave are arranged along the transport direction C while being sandwiched from above and below by the rotating top member 9 group. And is conveyed. Therefore, even if the adhesive 4 is applied to both the lower surface of the valley portion and the upper surface of the top portion of the corrugated sheet 2 at a time, the conveyance is not difficult as in the above-described conventional example. Except for the portion where the adhesive 4 is applied, the sheet is conveyed while being sandwiched by the group of top members 9.

[0029]

As described above, in the method for manufacturing a honeycomb core according to the present invention, the corrugated sheet is sandwiched from above and below by the rotating top member, and is formed along the left and right lateral directions of the wave. The following effects are exhibited by performing each process continuously while carrying the sheet in a state in which the ridges and valleys are arranged along the carrying direction.

First, the production line is shortened. That is, according to the method for manufacturing the honeycomb core, the space is excellent, for example, the manufacturing line when the whole is lined is shortened.

Second, uneven application and flow of the adhesive are prevented. That is, according to this method for manufacturing a honeycomb core, the adhesive can be uniformly applied without uneven application,
Since the flow out of the applied adhesive is also prevented,
Adhesion failure between the stacked corrugated sheets is avoided, the adhesive strength between corrugated sheets is improved, and the honeycomb core manufactured in this way has excellent cell wall adhesive strength.

Third, the adhesive can be applied to both the lower surface of the valley and the upper surface of the top of the corrugated sheet at a time. Therefore, the method for manufacturing the honeycomb core is efficient in that the labor is reduced and the configuration is simplified and simplified from such aspects. As described above, the effects exhibited by the present invention are remarkably large, for example, the problems existing in this type of conventional example are eliminated.

[Brief description of the drawings]

FIG. 1 is a schematic plan view showing an embodiment of a method for manufacturing a honeycomb core according to the present invention and showing an application step of an adhesive and the like.

FIG. 2 is a schematic plan view showing a subsequent stacking process and the like of the embodiment.

FIG. 3 is a schematic side view showing an adhesive application step and the like of the embodiment.

FIG. 4 is a schematic side view showing a subsequent stacking process and the like of the embodiment.

FIG. 5 is a schematic front view of a main part showing a top member and the like.

FIG. 6 shows a main part of the manufactured honeycomb core, and (1)
The figure is a front view of one example, and FIG. 2B is a perspective view of another example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Honeycomb core 2 Corrugated plate 3 Application roll 4 Adhesive 5 Cell 6 Lifter 7 Suction pad 8 Conveyor 9 Top member 10 Application device 11 Tray 12 Pickup roll 13 Intermediate roll 14 Drying device 15 Table 16 Cutter 17 Base 18 Stacking device 19 Flat plate 20 Cell wall 21 Shaft C Transport direction L Longitudinal direction S Short direction

Claims (2)

(57) [Claims] 1. First, a plurality of corrugated sheets in which corrugations are continuously bent are prepared, and then, while the corrugated sheets are sequentially conveyed one by one, a wave valley or a peak is formed. After the adhesive is applied to the striations with an application roll, the adhesive is dried while being continuously conveyed, and then a plurality of the conveyed corrugated sheets are stacked together with the valley and the top at the top and bottom and heated. Pressing and bonding,
Thus, a honeycomb core manufacturing method for obtaining a honeycomb core which is a planar assembly of hollow columnar cells, wherein the corrugated plate is formed such that corrugations are continuously folded in a longitudinal direction which is a front-back direction of a wave. The valleys and the ridges of the waves are formed along the transverse direction that is the left and right lateral directions of the waves. The corrugated sheet is sandwiched from above and below by a rotating top member, and the longitudinal direction of the corrugated sheet, which is the front-back direction of the wave, is arranged in a direction perpendicular to the transport direction, so that the horizontal direction of the wave The corrugated sheet is formed along the transverse direction, which is the horizontal direction of the wave, and the ridges and ridges of the wave are formed in the transport direction. Transporting in a state of being arranged along the honeycomb core. 2. The method for manufacturing a honeycomb core according to claim 1, wherein when the plurality of corrugated sheets are stacked and bonded together with the valleys and the tops vertically, flat flat plates are interposed. A method for manufacturing a honeycomb core.