JP3190524B2 - Honeycomb core manufacturing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an apparatus for manufacturing a honeycomb core. That is, the present invention relates to an apparatus for manufacturing a honeycomb core, which obtains a honeycomb core by forming a base material sheet into a corrugated sheet, stacking and bonding the sheets.

[0002]

2. Description of the Related Art In this type of honeycomb core, first, a base material sheet is formed into a corrugated sheet in which corrugations are continuously bent by a corrugating apparatus, and then the corrugated sheet formed in this manner is used. By applying an adhesive to the valley and the top with an application roll, and then stacking a plurality of such corrugated sheets together with the valley and the top at the top and bottom, and applying heat and pressure to bond them For example, it has been manufactured as a planar assembly of cells of a regular hexagonal hollow column shape. When manufacturing such a honeycomb core, each corrugated sheet is stacked via an adhesive while being positioned so that each valley and the top are aligned with each other at the top and bottom, and a laminated block shape having a space as a whole is provided. After that, it was heated in a furnace or the like and pressed in the up-down direction and the stacking direction, so that the parts were bonded to each other.

[0003]

The following problems have been pointed out in such a conventional example. First, when the corrugated sheets are stacked, the vertical positioning of the valley and the top is often inaccurate. In other words, each corrugated sheet that has only been coated with an adhesive but has not yet been bonded to each other is likely to move in the left-right direction, that is, in the ribbon direction that is the front-back direction of the wave, while remaining unconstrained. In many cases, the valleys and the tops do not match up and down, and the positioning is not accurate. So first,
The bonding treatment was performed without the adhesive being reliably positioned between the valleys and the tops of the upper and lower corrugated plates, and it was pointed out that the manufactured honeycomb core was uneasy about the bonding strength of the cell walls. In addition, due to the fact that they are not accurately positioned, for the manufactured honeycomb core, for example, each cell does not become an accurate regular hexagon, and the cells become irregular, and thus,
It was pointed out that the overall rigidity / strength, which is the characteristic, was uneasy, and that it looked bad. in this way,
Conventional honeycomb cores of this type have been pointed out to have problems in quality such as adhesive strength, overall rigidity / strength, and appearance.

Secondly, when bonding after stacking, the corrugated plates are often not pressed uniformly. In other words, each stacked corrugated sheet is pressed and bonded in the up-down direction and the stacking direction while being heated, and at this time, each corrugated sheet stacked at each valley and the top via an adhesive is used. It was difficult to apply pressure uniformly. In other words, the pressure is hardly applied uniformly because the stacked blocks are stacked as a whole with spaces. Therefore, an insufficient bonding position occurred due to insufficient pressurization between the valleys and the tops of the upper and lower corrugated sheets, and it was pointed out that the manufactured honeycomb core was insecure in the adhesive strength of the cell walls.
Also, due to the fact that pressure is not applied uniformly and defective bonding occurs, the cells may become uneven, which may lead to anxiety in the overall rigidity and strength, and the appearance may also deteriorate. Was. In the conventional honeycomb core, problems have been pointed out from these aspects in terms of quality.

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. First, by providing a top member used for bonding, the first problem is to provide a cell wall. Secondly, it is an object of the present invention to propose a honeycomb core manufacturing apparatus in which the bonding strength of the honeycomb core is improved, and the overall rigidity and strength of the honeycomb core are also improved and the appearance is good.

[0006]

The technical means of the present invention for achieving this object is as follows. That is, in this honeycomb core manufacturing apparatus, the base material sheet is formed into a corrugated sheet in which corrugations are continuously bent, and an adhesive is applied to a valley or a top of the corrugated sheet to form a plurality of sheets. The valleys and the tops of the corrugated sheets are stacked one on top of the other, and then heated and pressed for bonding, thereby obtaining a honeycomb core which is a planar assembly of hollow columnar cells.

The manufacturing apparatus includes a top member used for bonding, the top member has a shape corresponding to each cell of the honeycomb core to be manufactured, and the bonding agent is heated at a melting point temperature. Before bonding under heating and pressurization, it is inserted into the space between the stacked corrugated sheets. And the top member is not inserted in all the spaces between the corrugated plates, but in the vertical direction and the stacking direction which are the pressing directions,
Along with being continuously arranged, in the left-right direction, the front-rear direction of the corrugated sheet, and the ribbon direction, which are orthogonal to each other vertically and horizontally,
It is inserted at intervals. The top member functions to accurately position the valleys and the tops of the upper and lower corrugated sheets vertically, and also uniformly presses the valleys and the tops of the corrugated sheets and the adhesive. And functions to uniformly pressurize.

[0008]

The present invention comprises the above-mentioned means, and operates as follows. In this manufacturing apparatus, each corrugated sheet to which the adhesive has been applied is stacked with the valley and the top together, and then bonded by heating and pressing to manufacture a honeycomb core.
In this manufacturing apparatus, since the top member is used, the following first and second cases are obtained.

First, a top member is used, and the top members are continuously arranged in a space between the stacked corrugated sheets in a vertical direction and a stacking direction, which are post-pressing directions. , And are inserted with intervals in the left-right direction and ribbon direction. Therefore, when bonding the stacked corrugated sheets by applying heat and pressure in the vertical direction and the stacking direction, the pressure is uniformly applied to each valley, the top, the adhesive, etc. through the inserted top member. The piled-up valleys, peaks, adhesive, and the like are uniformly pressed. In other words, although the corrugated sheets are merely stacked so as to form a laminated block shape having a space as a whole, they are uniformly pressed. Therefore, as described in the second point, the valleys and the tops of the stacked corrugated sheets are accurately positioned, so that the valleys and the tops of the corrugated sheets are bonded together. The adhesive is surely adhered by the agent, and the occurrence of defective bonding due to insufficient pressurization as in the above-described conventional example of this type is prevented. This allows
With respect to the manufactured honeycomb core, the adhesive strength of the cell wall made of the corrugated sheet is improved.

Secondly, a top member is used, and the spaces between the stacked corrugated sheets are continuously arranged in the vertical direction and the stacking direction, and are spaced from each other in the horizontal direction and the ribbon direction. The top member is inserted. Therefore, the valley and the top of each of the stacked upper and lower corrugated sheets are
Accurate positioning. That is, as in the above-described conventional example, the situation in which each of the corrugated sheets to which the adhesive has only been applied but not yet adhered to each other moves in the left-right direction or the ribbon direction in an unconstrained state does not occur. It will not be generated and will be accurately positioned vertically. Thus, for the manufactured honeycomb core, the cells formed as the cell walls by bonding such corrugated sheets are surely aligned, and the overall rigidity and strength are improved, and the appearance is also beautiful. It is.

[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. FIG. 1 is a front view for explaining a first embodiment of the present invention. FIG. 1A shows a state in which a base material sheet is arranged between racks, and FIG. FIG. 3 (3) shows a formed corrugated sheet, and FIG. 4 (4) shows a state where an adhesive is applied. FIG. 2 is a front view for explaining the first embodiment. (1) FIG. 2 shows a stacked corrugated sheet, (2) FIG. 2 shows a bonded corrugated sheet and a manufactured honeycomb core. Is shown. FIG. 3 is a front view in which main parts are enlarged. FIG. 3A shows a reference example which does not belong to the present invention.
FIG. 2 shows a second embodiment of the present invention.

In the manufacturing apparatus for the honeycomb core 1, first, the base material sheet 2 is formed into a corrugated sheet 3 in which corrugated unevenness is continuously bent, and then the corrugated sheet 3 is bonded to a valley or a top of the corrugated sheet 3. After the agent 4 is applied, a plurality of corrugated plates 3 are stacked one on top of the other, with the valley and the top being combined, and then heated and pressed and adhered, thereby forming a planar assembly of hollow columnar cells 5. A certain honeycomb core 1 is obtained.

An apparatus for manufacturing such a honeycomb core 1 will be described in more detail. First, as the base material sheet 2 shown in FIG. 1A, aluminum foil or other metal foil, aramid paper or other special paper, PVC sheet or other plastic sheet, fiber reinforced plastic sheet (FRP sheet)
And other various materials are used, and have an extremely thin and flat, for example, belt-like shape. And such a base material sheet 2
As shown in FIG. 1 (2), it is supplied to a corrugating device 7 equipped with gears, racks 6, corrugated belts and the like (the corrugating device 7 shown comprises a pair of upper and lower racks 6). . Then, by heating and pressing, (3) in FIG.
The corrugated sheet 3 shown in the figure is formed. The corrugated sheet 3 may have a substantially trapezoidal shape in cross section, a substantially triangular shape, a substantially square shape, or any other shape. Are continuously bent in a longitudinal direction and a front-rear direction at a predetermined pitch and height. Then, as shown in FIG. 1 (4), the adhesive 4 is applied to the corrugated sheet 3 by the application roll 8 so that, for example, as shown in FIG. , Respectively, are applied in the form of stripes, dots or spots over the entire surface.

Thereafter, as shown in FIG. 2 (1), the corrugated sheet 3 coated with the adhesive 4 and dried as described above is used.
And the corrugated sheet 3 to which the adhesive 4 has not been separately applied, and the plurality of the valleys and the tops are alternately piled up via the adhesive 4 so that the laminated block has a space as a whole. State. Then, as shown in FIG. 2 (2), each of the stacked corrugated sheets 3 is heated and pressed at the melting point temperature of the adhesive 4 in a furnace 9 or the like, and the adhesive 4 is melt-hardened. The space is glued. Thus, in the illustrated example, the honeycomb core 1 including the regular hexagonal cells 5 is manufactured. In FIG. 2 (2), A indicates a stacking direction, a vertical direction, and a pressing direction of the corrugated sheet 3, B indicates a front-rear direction and a ribbon direction of the corrugated sheet 3, and both directions A and B are shown. , Which are orthogonal in the vertical and horizontal directions.

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 each of the corrugated sheets 3 formed as described above.
A plurality of the corrugated sheets 3 to which the adhesive 4 has been applied and dried may be stacked and bonded. Further, regardless of such an example, as shown in FIG. 3 (2), a plurality of sheets formed and dried as described above and coated with the adhesive 4 on both the lower surface of the valley and the upper surface of the top are dried. A corrugated plate 3 and a plurality of flat plates 10 made of a flat base material sheet 2 (see also FIG. 1 (1)) separately prepared without being formed on the corrugated plate 3,
The layers may be alternately stacked with the adhesive 4 interposed therebetween, so that a laminated block having a space as a whole may be provided. In this case, between the corrugated plates 3, the valleys and the ridges are stacked and adhered in a positional relationship in which the valleys and the ridges are joined via the interposed flat plates 10, respectively. As shown, the honeycomb core 1 including the trapezoidal cells 5 is manufactured.

In this manufacturing apparatus, as shown in FIG. 2 (2) and FIG. 3 (2), etc., the corrugated plate 3 and the flat plate 10 are used as the cell walls 11 in this manner. The honeycomb core 1, which is a planar assembly of a large number of hollow column-shaped cells 5 partitioned into cells, is manufactured. The cross-sectional shapes of the cell wall 11 and the cell 5 can be triangular, quadrangular, or various other shapes in addition to the regular hexagonal shape and trapezoidal shape illustrated. The honeycomb core 1 has excellent weight ratio strength, is lightweight and has high rigidity and strength, and also has excellent rectifying effect, planar accuracy, heat insulation, and sound insulation, and has a large surface area per unit volume. Such properties are generally known.

Now, a manufacturing apparatus for manufacturing such a honeycomb core 1 is as follows in the first embodiment of the present invention shown in FIG. That is, the manufacturing apparatus of the first embodiment first includes the restraining jig C used for stacking and bonding. The restraining jig C has at least a frame shape and can accommodate a plurality of corrugated sheets 3 stacked therein, and sandwiches each corrugated sheet 3 from both sides in the ribbon direction B which is the front-back direction of the wave. In order to be able to immovably regulate the corrugated sheet, the corrugated sheet 3 is provided with an interval corresponding to the dimension in the ribbon direction B.
The restraining jig C has a frame shape in which the upper surface is opened and the corrugated plate 3 is sequentially loaded, and in the illustrated example, both sides of the wave, that is, the front and back sides of the drawing are also opened. Instead of the illustrated example, the wave may be formed in a closed frame shape, that is, a box shape, also in the horizontal direction of the wave, that is, the front and back sides of the paper surface. Each corrugated sheet 3 is accommodated and stacked in such a restraining jig C, and is then heated and pressed in a furnace 9 or the like and adhered.

Then, the first type shown in FIG.
Each of the manufacturing apparatuses of the embodiment and the second embodiment shown in FIG. 3 (2) includes a top member D used for bonding, and the top member D is provided in each cell of the honeycomb core 1 to be manufactured. 5, and is inserted into the space between the stacked corrugated sheets 3 from the lateral direction, that is, from the front and back sides of the drawing.

The top member D will be described in detail. The top member D is made of a non-metal such as metal or resin, and has heat resistance and releasability. Then, after the stacking of the corrugated sheets 3 and before bonding by heating and pressing, they are inserted into the spaces between the corrugated sheets 3 and used for bonding. The top member D has a prismatic shape and a cross-sectional shape corresponding to each cell 5 of the honeycomb core 1 to be manufactured. In the first embodiment shown in FIG. None, the second embodiment shown in FIG. 3B has a trapezoidal cross section. Further, in the reference example shown in FIG. 3A, the top member D is inserted into all the spaces between the corrugated plates 3 serving as the cells 5, whereas in FIG. 2B and FIG. In the first and second embodiments of the present invention shown in FIG. 2 (2), they are continuously inserted in the stacking direction A which is the pressing direction, and are fitted and inserted at intervals in the ribbon direction B.

The present invention is configured as described above. Then, it becomes as follows. In this manufacturing apparatus, the respective corrugated plates 3 to which the adhesive 4 has been applied are stacked one on top of the other, with the valleys and the tops being aligned, and then bonded by heating and pressing, whereby the honeycomb core 1 is manufactured. First, in the first embodiment of FIG. 2, a restraining jig C is used, and the corrugated sheets 3 to be stacked are sandwiched from both sides to be immovably restricted. So each corrugated sheet 3
Is a ribbon which is only left and right in the drawing, that is, in the front-rear direction of the wave, since the adhesive 4 is only applied and the mutual bonding is not yet completed. There is no displacement in the direction B, and the valleys and the tops are accurately positioned vertically, and are stacked and bonded in a state where the adhesive 4 is securely positioned between the valleys and the tops. .

In the first embodiment shown in FIG. 2 (2) and the second embodiment shown in FIG. 3 (2), the top member D is used, and the space between the stacked corrugated sheets 3 is used. Is inserted. Therefore, when the corrugated plates 3 are bonded while being heated and pressed in the up-down direction and the stacking direction, the pressure is evenly applied to the valleys, the tops, the adhesive 4, and the like via the inserted top members D. And pressurized uniformly. Therefore, according to the honeycomb core 1 manufacturing apparatus of the first and second embodiments, the following first and second embodiments are obtained.

First, the bonding strength of the cell wall 11 of the manufactured honeycomb core 1 is improved. That is, in the first and second embodiments, since the top member D is used, the stacked corrugated plates 3 are uniformly pressed, and the adhesive between the valleys and the tops is formed by the adhesive 4. Since the bonding is ensured, the occurrence of defective bonding due to insufficient pressurization as in the above-described conventional example is prevented. With respect to the honeycomb core 1 thus manufactured, the adhesive strength of the cell wall 11 including the corrugated sheet 3 is improved.

Second, the overall rigidity and strength are improved and the appearance is good. That is, first, in the first embodiment, the restraining jig C
Is used, the valleys and the tops of the upper and lower corrugated plates 3 are accurately positioned, and in the first and second embodiments, the use of the top member D provides an equivalent operation. Demonstrate. With respect to the honeycomb core 1 manufactured in this way, the cells 5 formed with the corrugated plate 3 as the cell walls 11 become, for example, an accurate regular hexagon, and the cells 5 are surely aligned, and the overall rigidity and strength are reduced. Improves and looks good.

[0024]

As described above, the honeycomb core manufacturing apparatus according to the present invention has the following effects by being provided with the top member used for bonding as described above.

First, the adhesive strength of the cell wall is improved. That is, the stacked corrugated sheets are uniformly pressed, and the valley and the top are securely bonded. Thus, the manufactured honeycomb core is excellent in quality, such as the adhesive strength of the cell wall is remarkably improved as compared with the above-described conventional example.

Second, the overall rigidity and strength are improved, and the appearance is good. That is, since the positions between the valleys and the tops of the upper and lower corrugated plates are accurately positioned, the cells are surely aligned. As a result, the overall rigidity and strength of the manufactured honeycomb core are remarkably improved as compared with the above-described conventional example, and the appearance is excellent and the quality is excellent from these 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 an explanatory front view for explaining a first embodiment of a honeycomb core manufacturing apparatus according to the present invention, in which (1) FIG. 1 shows a base material sheet and (2) FIG. (3) shows a formed corrugated sheet, and (4) shows a state in which an adhesive is applied by an application roll.

FIGS. 2A and 2B are front explanatory views for explaining the first embodiment, in which FIG. 1A shows a stacked corrugated sheet, and FIG. 2B shows a bonded corrugated sheet and a manufactured honeycomb core. Are respectively shown.

FIG. 3 is an enlarged front view of the main part, showing a corrugated plate and a manufactured honeycomb core, respectively,
(1) The figure relates to a reference example not belonging to the present invention, and (2)
The figure relates to a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Honeycomb core 2 Base material sheet 3 Corrugated sheet 4 Adhesive 5 Cell 6 Rack 7 Corrugate forming device 8 Application roll 9 Furnace 10 Flat plate 11 Cell wall A Stacking direction B Ribbon direction C Restraining jig D Top member

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) B32B 1/00-35/00 B21D 47/00 B31D 3/02

Claims (1)

(57) [Claims] 1. A base material sheet is a corrugated sheet in which corrugations are continuously bent, and an adhesive is applied to a valley or a crest of the corrugated sheet so that a plurality of the corrugated sheets are vertically moved. A top member used for bonding in a honeycomb core manufacturing apparatus, in which a valley portion and a top portion are stacked and stacked, and then heated and pressed and bonded to obtain a honeycomb core which is a planar aggregate of hollow columnar cells. The top member is formed in a shape corresponding to each cell of the honeycomb core to be manufactured, and before bonding by heating and pressing at the melting point temperature of the adhesive, between the stacked corrugated sheets. And the top members are not inserted in all the spaces between the corrugated sheets, but are continuously arranged in the vertical direction and the stacking direction which are the pressing directions. In addition, in the left-right direction and in front of the corrugated sheet, which are perpendicular to the stacking direction in the vertical and horizontal directions In the direction and ribbon direction, the ribs are inserted with a gap therebetween, and the top member functions to accurately position the valleys and the tops of the upper and lower corrugated plates vertically, and the valleys of the corrugated plates. A honeycomb core manufacturing apparatus, which functions to apply uniform pressure to a part, a top part, and each of the adhesives to uniformly press the adhesive.