JPH0847991A - Production of honeycomb core - Google Patents

Abstract

PURPOSE:To provide a honeycomb core-producing method shortening a production line and excellent from an aspect from a space in the first place, preventing the coating irregularity or outflow of an adhesive and excellent in the bonding strength of cell walls in the second place and capable of once applying an adhesive to both of the rear surfaces of the valley parts of a corrugated sheet or the upper surfaces of the ridge parts thereof, simplified and facilitated in constitution and efficient because labor is omitted in the third place. CONSTITUTION:A large number of corrugated sheets 2 are successively fed one at a time and an adhesive is applied to the valley or ridge parts of the corrugations of each of the corrugated sheet 2 by a coating roll to be dried and a large number of the fed corrugated sheets 2 are stacked so that the valley and ridge parts of them are mutually matched up and down and bonded under heating and pressure to produce a honeycomb core. In the feed of the corrugated sheets, the corrugated sheets 2 are respectively held from above and below in succession by rotary roll members 9 and the longitudinal direction L of the corrugated sheets 2 is arranged in the direction right-angled to a feed direction C to feed the corrugated sheets along the left and right lateral and short direction S of corrugations.

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 for manufacturing a honeycomb core in which 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 type conveys a band-shaped corrugated sheet prepared in advance, cuts it at a predetermined length, and applies an adhesive to the valleys or the tops of the waves with a coating roll. Then, after being dried while being continuously conveyed, a plurality of such corrugated sheets were stacked and heat-pressed to bond them. Then, in such a honeycomb core manufacturing method, conventionally, the corrugated plate is arranged in the conveying direction, and while being conveyed along the longitudinal direction before and after the wave, the application and drying of the above-mentioned adhesive, etc. Was being processed.

[0003]

By the way, the following problems have been pointed out in such a conventional example. First of all, in the conventional manufacturing method, as described above, each treatment was performed while the corrugated plate was conveyed in the longitudinal direction before and after the wave.
Therefore, when it is made into a line, problems have been pointed out in terms of space, such as the entire manufacturing line being extremely long.

Secondly, since the adhesive was applied while the corrugated sheet was conveyed in the longitudinal direction before and after the wave, uneven application of the adhesive, flow-out, etc. were likely to occur. That is, the adhesive is applied by a coating roll whose axis is arranged at a right angle to the conveying direction.However, in the conventional manufacturing method, the ridges such as the bottom surface of the corrugated sheet and the top surface of the corrugated sheet to be coated are Since they are lined up at right angles to the transport direction, the application direction and the application target are crossing, and it is difficult for the contact between the application roll and the striation to be completely smooth, which is intermittent / momentary and does not match. The uneven coating of the adhesive was likely to occur due to the tendency to cause Further, since the adhesive applied for some time has fluidity before drying, it is easy for the adhesive to flow out from the striations such as the lower surface of the valley and the upper surface of the top of the corrugated sheet to be applied. Therefore, due to these, adhesion failure is likely to occur between the stacked corrugated sheets, the adhesive force between them is insufficient, and the manufactured honeycomb core may cause anxiety about the adhesive strength of the cell wall. It was.

Thirdly, the application of the adhesive agent to the corrugated plate is often performed on both the bottom surface and the top surface of the valley of the corrugated plate, but this could not be done at once. That is, in the conventional manufacturing method, the adhesive is applied while conveying the corrugated sheet in the longitudinal direction before and after the wave, so if the corrugated sheet is applied to both the bottom surface and the top surface of the corrugated sheet at the same time. Then, it becomes difficult to carry the sheet, especially on the lower surface side of the valley. Therefore, in such a case, it has been pointed out that conventionally, the adhesive is applied with a shift over time, which is troublesome and the labor-saving efficiency is poor.

In view of such circumstances, the present invention has been made to solve the problems of the above-mentioned conventional example, in which the corrugated plate is sandwiched between the rotating top members from above and below, and the left and right sides of the waves are First, the manufacturing line is shortened by carrying out each treatment continuously while transporting in the lateral direction.
Secondly, uneven application of the adhesive and flow-out of the adhesive are prevented.
In addition, it is an object of the present invention to propose a method for manufacturing a honeycomb core, which makes it possible to apply the adhesive to both the bottom surface and the top surface of the corrugated plate at once.

[0007]

The technical means of the present invention for achieving this object is as follows. First, claim 1
About: That is, in this method for manufacturing a honeycomb core, first, a plurality of corrugated sheets in which corrugated concavities and convexities are continuously bent and formed are prepared, and then the corrugated sheets are sequentially conveyed one by one while the corrugated troughs are sequentially conveyed. After applying the adhesive to the parts and tops with a coating roll, it is continuously conveyed and dried, and then a plurality of the corrugated plates that have been further conveyed are piled up by stacking the valleys and tops together at the top and bottom. The honeycomb core, which is a planar aggregate of hollow columnar cells, is obtained by pressurizing and adhering. Then, in each of the above-described transportations of the corrugated plate, the corrugated plate is sandwiched between the rotating top members from above and below,
The corrugated plates are arranged in a direction perpendicular to the conveying direction, and the corrugated plates are arranged along the left and right lateral directions of the wave.

Next, claim 2 is as follows. That is, in this manufacturing method, in the method for manufacturing a honeycomb core according to claim 1, when a plurality of the corrugated plates are piled up and bonded with the valleys and the tops vertically, the flat plates are respectively interposed. It becomes.

[0009]

Since the present invention comprises such means, it operates as follows. In this manufacturing method, the honeycomb core is manufactured by sequentially transporting the corrugated sheets one by one, applying an adhesive to the troughs and tops of the waves and drying the same, and then stacking and bonding a plurality of the corrugated sheets. In the second aspect, flat plates are interposed between such corrugated plates. In this manufacturing method, the corrugated plate is sandwiched between the rotating top members from above and below,
While being conveyed in the left and right lateral directions of the wave, each process such as application of adhesive and drying is continuously performed.

Therefore, in this manufacturing method, firstly, since the corrugated sheet is conveyed in the lateral direction, the whole manufacturing line is shortened when it is made into a line. Secondly, since the adhesive is applied while the corrugated sheet is conveyed in the lateral direction, the contact with the application roll is smooth, and the adhesive is applied evenly and uniformly, preventing uneven application and applying the adhesive. It is also possible to prevent the adhesive from flowing out. Thirdly, application of the adhesive to the corrugated plate is often performed on both the bottom surface and the top surface of the corrugated plate, but the corrugated plate is laterally conveyed while being sandwiched by the top members. Therefore, 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 explaining the embodiments of the present invention, and FIG. 1 is a schematic plan view of an adhesive applying process and the like, and FIG.
Is a schematic plan view of a subsequent stacking step, etc., FIG. 3 is a schematic side view of an adhesive applying step, etc., and FIG. 4 is a schematic side view of a subsequent stacking step etc. FIG. 5 is a schematic front view of an essential part of a top member and the like, FIG. 6 (1) is a front view of an essential part of an example of a manufactured honeycomb core, and FIG. 6 (2) is an illustration. FIG. 8 is a perspective view of a main part of another example of the honeycomb core.

In the method for manufacturing the honeycomb core 1, first, a plurality of corrugated plates 2 having corrugated concavities and convexities continuously formed by bending are prepared, and then the corrugated plates 2 are sequentially conveyed one by one. While applying the adhesive 4 with the coating roll 3 to the troughs and tops of the waves, it is continuously transported and dried, and then a plurality of corrugated plates 2 further transported, and the troughs and tops are vertically aligned. Then, the honeycomb core 1 which is a planar aggregate of the hollow columnar cells 5 is manufactured.

Regarding such a manufacturing method and 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, vinyl chloride sheet, other plastic sheet, fiber reinforced plastic sheet (FRP sheet), and other various materials, and is extremely thin. The flat base material sheet is supplied to a corrugate molding device equipped with gears, racks, etc., and molded. This corrugated sheet 2
In addition to the trapezoidal cross section, various triangular shapes, quadrangular shapes, and other various shapes are conceivable, and such corrugated irregularities are continuously formed in the longitudinal direction and the front-back direction at a predetermined pitch and height. It is formed by bending. Then, as shown in FIG. 3, a large number of the corrugated plates 2 thus prepared are stacked on the lifter 6.

Then, of the many corrugated plates 2 stacked in this way, one corrugated plate 2 located at the uppermost position is adsorbed by the adsorption pad 7 of the vacuum device shown in FIG. 3, for example. To be done. That is, the suction pad 7 descends, adsorbs, rises,
By performing the operations of moving, lowering, and adsorbing, the corrugated plates 2 are sequentially supplied one by one onto the conveyor 8. Then, via the conveyor 8, as shown in FIGS. 1 and 3,
The coating device 10 includes a group of 9 members (detailed later) for transportation.
Is 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 plate 2 via the pick-up roll 12, the interposition roll 13, the application roll 3 and the like which are rotated. That is, the adhesive 4 is applied by the applying roll 3 to the short-side direction line parts of the corrugated plate 2 such as the bottom surface of the wave troughs and the top surface of the tops in a linear manner. In the illustrated example, the adhesive 4 is applied by the upper and lower applicator rolls 3 to both the bottom line and the top face of the wave. Note that the adhesive 4
In some cases, the adhesive may be applied only to one of the ridges on the bottom surface of the wave trough or on the top surface of the wave, and in addition, the adhesive 4 may be applied in the form of dots or spots instead of the ridge.

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

The corrugated sheet 2 thus dried with the adhesive 4
Are further conveyed by the top member 9 group, and on the table 15 as shown in FIG. 2 and FIG. Longitudinal direction L
Is shifted by half the pitch of the wave along the line, and the end is cut by the attached cutter 16, so that the dimension in the longitudinal direction L is made uniform. Then, as shown in FIG. 4, the corrugated plate 2 is transported to the conveyor 8 and then the suction pad 7 performs the operations of descending, adsorbing, ascending, moving, descending, and adsorbing, thereby removing the base. It is supplied to a stacking device 18 on 17. Then, the corrugated plate 2 is put into the stacking device 18, but since it is sequentially shifted by the half pitch of the wave as described above, a large number of corrugated plates are arranged in the upper and lower parts so that the valley part and the top part are aligned with each other. The sheets are piled up in the form of laminated blocks that have a space as a whole.

In the illustrated example, in the case of such 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. To be done. That is, a large number of flat plates 19 are piled up on the lifter 6 in advance, and the uppermost one of the flat plates 19 is piled up by each operation of the suction pad 7 descending, adsorbing, rising, moving, descending, and adsorbing. It is supplied to the stacking device 18. Each time the corrugated plates 2 are supplied to the stacking device 18 one by one as described above, the flat plates 19 are supplied to the stacking device 18 one by one with timing. Therefore, the corrugated sheets 2 in the illustrated example are sequentially stacked in a positional relationship in which the corrugated portions and the top portions thereof are arranged via the flat plates 19 having the trough portions and the top portions respectively interposed.

Note that, regardless of such an illustrated example, the corrugated sheet 2 having the lower surface of the valley portion and the upper surface of the top portion coated with the adhesive 4 as described above, and the corrugated sheet 2 separately prepared and not coated with the adhesive 4 are provided. May be sequentially stacked in the stacking device 18 while aligning the valley and the top. Further, irrespective of the illustrated example, the adhesive 4 is applied only to 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 thus coated with the adhesive 4 is placed in the stacking device 18. You may make it pile up in order.

In any case, the corrugated sheets 2 (in the illustrated example, the corrugated sheets 2 in which the flat plates 19 are interposed) stacked in a laminated block shape in which there is a space as a whole are as follows. , And is heated and pressed at the melting point temperature of the adhesive 4 in a furnace or the like. As a result, the adhesive 4 is melted and hardened, so that the corrugated sheets 2 are stacked.
The space (between each corrugated plate 2 and the flat plate 19 in the illustrated example) is bonded.

In this manufacturing method, in this manner, the corrugated plate 2 and the flat plate 19 are used as the cell walls 20, and the honeycomb core is a planar aggregate of a large number of hollow columnar cells 5 partitioned into independent spaces. 1 is manufactured. In FIG. 6A, the corrugated plate 2 and the flat plate 19 are shown in FIGS. 1, 2, 3, and 4.
The honeycomb core 1 manufactured as the cell wall 20 is shown, and the honeycomb core 1 manufactured only as the corrugated plate 2 as the cell wall 20 is shown in FIG. 6 (2). By the way, the sectional shape of the cell walls 20 and the cells 5 of the honeycomb core 1 manufactured in this way can be a trapezoidal shape or a regular hexagonal shape shown in FIG. . And the honeycomb core 1 is
It is known that it has excellent weight ratio strength, is lightweight, has high rigidity and strength, is excellent in rectifying effect, flatness accuracy, heat retention and sound insulation and has a large surface area per unit volume. ing.

In the method for manufacturing the honeycomb core 1 as described above, the corrugated plates 2 are conveyed by sequentially sandwiching the corrugated plates 2 from above and below by the rotating top members 9, respectively. It is arranged in a direction perpendicular to the transport direction C, and is performed along the lateral and lateral directions S on the left and right of the wave.

The method of conveying the corrugated plate 2 will be described in more detail. First, the top member 9 composed of rollers is shown in FIG.
As also shown in FIG. 5, a large number of shafts are attached to the shaft 21 at predetermined intervals, and are rotated by the shaft 21. Thus, the shafts 21 provided with a large number of top members 9 are vertically paired, and their axes are oriented at right angles to the carrying direction C, and a large number of them are arranged in a row at predetermined intervals in the carrying direction C. There is. That is, such a shaft 21
The group of top members 9 attached to
As shown in FIG. 4, from the conveyor 8 attached to the lifter 6 for stacking the corrugated sheets 2, the application device 10 for the adhesive 4
The corrugated sheet 2 is arranged over the drying device 14, the table 15, etc., so that the corrugated plate 2 is conveyed to the stacking device 18 in the conveying direction C.

As shown in FIG. 5, the upper members 9 are in contact with the upper surfaces of the valleys of the corrugated plate 2, and the lower members 9 are respectively in contact with the lower surfaces of the tops of the corrugated plate 2. The diameter, the wall thickness, the distance between them, etc. are set so as to be in contact with each other. That is,
Since the adhesive 4 is applied to the bottom surface and the top surface of the valley of the corrugated plate 2, it comes into contact with the top surface and the bottom surface of the valley, which are the opposite surfaces that do not come into contact with the adhesive 4, respectively. The upper and lower groups of top members 9 are arranged in such a positional relationship and are rotated by the shaft 21 so that the corrugated plate 2 is carried in the carrying direction C while being sandwiched from above and below.

By the way, the corrugated plate 2 has such a top member 9 as described above.
While being conveyed in groups, as shown in FIG. 1 and FIG. 2, they are arranged with the longitudinal direction L, which is the front-back direction of the wave, facing the direction perpendicular to the conveying direction C. It is conveyed along the direction S. That is, the corrugated plate 2 is positioned on the lifter 6 in such a direction, and thereafter, while being oriented in the same direction, is conveyed by the top member 9 group via the suction pad 7 and the conveyor 8. Then, the corrugated plate 2 is thus conveyed by the top member 9 group while the transverse direction / short direction S of the wave is the conveying direction C, and the adhesive 4 is applied by the applying roll 3 of the applying device 10, After the adhesive 4 is dried by the drying device 14, it is shifted by half a wave pitch on the table 15, the end is cut by the cutter 16, and the adhesive 4 is supplied to the stacking device 18.

The method for manufacturing the honeycomb core 1 of the present invention is as described above. Then it becomes as follows. In this method for manufacturing the honeycomb core 1, a plurality of corrugated plates 2 prepared in advance are sequentially conveyed one by one, and the adhesive 4 is applied to the troughs or tops of the waves and dried, and then sequentially in the vertical direction. The honeycomb core 1 is manufactured by shifting by half a pitch of the wave and stacking and adhering the valley and the top together. In this manufacturing method, the corrugated plate 2 is sandwiched between the rotating top members 9 from above and below, and the corrugated plate 2 is conveyed in the lateral and lateral directions S to the left and right of the wave while being bonded by the coating roll 3 of the coating device 10. Each processing such as application of the agent 4 and drying by the drying device 14 is continuously performed and stacked on the stacking device 18. Therefore, according to the method for manufacturing the honeycomb core 1, the following first, second, and third aspects are obtained.

First, in this manufacturing method, the corrugated plate 2 is
It is arranged with its longitudinal direction L oriented in a direction perpendicular to the carrying direction C, and while being carried in the lateral and lateral directions S on the left and right of the wave, each process is performed and stacked. In this way, since the corrugated sheet 2 is conveyed along the lateral direction and the lateral direction S thereof, the production line is shortened when the whole processing is made into a line. That is, as compared with the case where the corrugated plate 2 is conveyed with the longitudinal direction L before and after the wave as the conveying direction C as in the conventional example of this kind described above, the entire manufacturing line is greatly shortened.

Secondly, in this manufacturing method, the corrugated plate 2 is
The adhesive 4 is applied in a direction perpendicular to the carrying direction C, and the adhesive 4 is applied while being carried in the lateral and lateral directions S on the left and right of the wave. That is, by the coating roll 3 of the coating device 10 whose axis is arranged at a right angle to the transport direction C, with respect to the ridges such as the bottom surface of the troughs and the top surface of the corrugated plates 2 arranged along the transport direction C, Adhesive 4 is applied. Therefore, the application direction and the application target are parallel to each other, the contact between the application roll 3 and the linear portion is smoothly performed linearly and continuously, and the adhesive 4 is gradually and reasonably applied. As a result, the adhesive 4 is evenly applied to prevent uneven application, and the applied undried yet fluid adhesive 4 is prevented from flowing out. As described above, the uneven coating and the outflow, which have been pointed out in the above-mentioned conventional example of this kind, are reliably prevented.

Thirdly, the application of the adhesive 4 to the corrugated plate 2 is often performed on both the bottom surface and the top surface of the corrugated plate 2. In this manufacturing method, the corrugated plate 2 is While being sandwiched from above and below by the rotating top member 9 group, they are conveyed in the lateral and lateral directions S of the waves. Therefore, for both the bottom surface and the top surface of the corrugated plate 2,
Even if the adhesive 4 is applied at one time, it does not become difficult to convey as in the above-described conventional example of this kind, and the corrugated plate 2 is applied to the top member 9 group except the part where the adhesive 4 is applied. It is conveyed while being pinched.

[0029]

As described above, in the method for manufacturing a honeycomb core according to the present invention, the corrugated plate is sandwiched between the rotating top members from above and below, and the corrugated plates are conveyed laterally in the left and right directions, and each treatment is performed. By carrying out the step continuously, the following effects are exhibited.

First, the manufacturing line is shortened. That is, according to the method for manufacturing the honeycomb core, the manufacturing line is shortened when the whole is made into a line, and the space is excellent.

Secondly, uneven application of the adhesive and flow-out of the adhesive are prevented. That is, according to this method for manufacturing a honeycomb core, the adhesive can be applied uniformly without uneven application, and
It also prevents the applied adhesive from flowing out, so
The adhesion failure between the corrugated plates that have been piled up is avoided and the adhesion force between the corrugated plates is improved, and the honeycomb core thus manufactured is excellent in the adhesion strength of the cell walls.

Thirdly, it is possible to apply the adhesive to both the bottom surface and the top surface of the corrugated plate at once. Therefore, the method of manufacturing the honeycomb core is efficient in that the labor is reduced and the configuration is simplified and facilitated in this respect. 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 schematic plan view for explaining an embodiment of a method for manufacturing a honeycomb core according to the present invention and showing an adhesive applying step and the like.

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

FIG. 3 is a schematic side view showing an adhesive applying step and the like of the same example.

FIG. 4 is a schematic side view showing a subsequent stacking step and the like of the same example.

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 the example, and (2) is a perspective view of another example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Honeycomb core 2 Corrugated plate 3 Coating roll 4 Adhesive 5 Cell 6 Lifter 7 Adsorption pad 8 Conveyor 9 Top member 10 Coating device 11 Tray 12 Pickup roll 13 Interposition 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)

[Claims] 1. First, a plurality of corrugated sheets in which corrugated corrugations are continuously bent and formed are prepared, and then the corrugated sheets are sequentially transferred one by one while being applied to the troughs or tops of the corrugations. After applying the adhesive with a roll, it is continuously transported and dried, and then a plurality of further transported corrugated plates are piled up by stacking the valleys and the tops at the top and bottom and bonding by heating and pressing. A method of manufacturing a honeycomb core, wherein a honeycomb core, which is a planar aggregate of hollow columnar cells, is obtained, wherein each of the above-mentioned transports of the corrugated plate is performed by a top member that rotates the corrugated plate. A method for manufacturing a honeycomb core, which is sandwiched from above and below, and the corrugated plates are arranged in a direction perpendicular to the conveying direction, and the corrugated plates are arranged along the lateral directions of the waves. 2. The method for manufacturing a honeycomb core according to claim 1, wherein when a plurality of the corrugated plates are piled up and bonded by vertically aligning a valley portion and a top portion, flat flat plates are respectively interposed. And a honeycomb core manufacturing method.