JP3493131B2 - Method for manufacturing bisect type fiber reinforced plastic honeycomb core - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] BACKGROUND OF THE INVENTION 1. Field of the Invention
Manufacturing method of honeycomb core made of fiber reinforced plastic
Related. That is, made of fiber reinforced plastic (FRP)
A corrugated sheet and a flat sheet are successively stacked and joined alternately.
It relates to a method for manufacturing a sect type honeycomb core.
is there. [0002] 2. Description of the Related Art FIG. 2 shows a conventional bisect of this type.
Of honeycomb cores made of different types of fiber reinforced plastic
Provide a description of the method. Figure (1) shows the fiber reinforced plastic
Perspective view of stick, (2) is a perspective view of corrugated sheet and flat plate
FIG. 3 (3) is a front view of corrugated sheets and flat sheets to be stacked.
is there. As shown in the figure, as shown in FIG.
First, the fiber-reinforced plastic shown in FIG.
2 is a corrugated plate 1 and a flat plate 2 shown in FIG.
Had been molded. In other words, a flexible prepreg
Fiber-reinforced plastic A is used as a base material sheet.
By heating and pressurizing
And molding the corrugated sheet 1 made of fiber reinforced plastic A
Then, the corrugated sheet 1 is cured by heating. Also,
Soft prepreg-like fiber reinforced plastic A
Into a flat sheet-shaped flat plate 2 and
The plate 2 is cured by heating. [0003] Then, as shown in FIG.
Then, with respect to the top surface and the bottom surface of the cured corrugated sheet 1,
The adhesive B is applied in a stripe shape. Then, (3) in FIG.
As shown in the figure, the adhesive B
The corrugated plate 1 coated with the resin and the cured flat plate 2 are sequentially alternated
Are stacked in a laminated block shape. And heat and press
As a result, the molten and cured adhesive B
The corrugated plate 1 and the flat plate 2 are bonded. This kind of conventional example
In the manufacturing method, by following these steps,
As shown in the front view, each of the cured, piled and glued corrugated sheets
1 and the flat plate 2 are used as a cell wall 3 and formed by the cell wall 3
Fibers, which are planar aggregates of a large number of hollow columnar cells 4
A honeycomb core 5 made of fiber-reinforced plastic was obtained. [0004] By the way, such a problem is solved.
The following problems have been pointed out in the conventional example. First
1, corrugated plate 1 and flat plate 2 are made of fiber reinforced plastic A
Therefore, the outer surface often has irregularities.
That is, the fiber reinforced plastic A is made of warp or weft.
Adhesion, impregnation, mixing, etc. of resin to woven fiber base
It consists of a combined configuration. Therefore, such fiber strength
Of corrugated sheet 1 cured with plasticized plastic A as a base material
For the outer surface and the outer surface of the flat plate 2, use aluminum foil or the like as a base material.
Unevenness is inevitably formed compared to the case where
Many. FIGS. 4 (4), (5) and (6) in FIG.
For explanation of such a conventional example of this kind, the wave which is the cell wall 3
FIG. 4 shows the state of adhesion between the plate 1 and the plate 2, and FIG.
Is a front view of the main part when the surface is flat, and FIG.
Is a front view of the main part when the concave C exists on the surface of the corrugated sheet 1,
(6) The figure shows the correct main part when the convex D exists on the corrugated sheet 1 surface.
FIG. Then, as shown in FIG. 4 (4), the cell wall
3 If the outer surface of the corrugated plate 1 or the flat plate 2 is flat, there is a problem.
However, in practice, it is shown in the diagrams (5) and (6) of FIG.
As described above, the top surface and the bottom back of the hardened corrugated sheet 1
Concave C and convex D are often formed on the outer surface such as the surface.
Also, on the outer surface of the cured flat plate 2,
A convex D is often formed (not shown). Therefore,
Due to the existence of the concave C and the convex D, the corrugated plate 1 and the flat plate 2
However, it has been pointed out that the adhesive strength of the resin decreases. That is, the above-described conventional manufacturing method of this kind
In the method, the corrugated plate 1 and the flat plate 2 are bonded using the adhesive B.
However, the top surface and bottom surface of the hardened corrugated sheet 1,
The surface to be bonded, such as the outer surface of the cured flat plate 2, is
If there are concave C and convex D instead of flat like
The concave C and the convex D tended to be obstacles to adhesion. That is,
Adhesive portions may be unevenly distributed between the corrugated sheet 1 and the
Poor adhesion due to gaps at the place of attachment
There were many. Therefore, it is possible to obtain
The honeycomb core 5 made of the fiber reinforced plastic A
Cell wall 3 composed of such corrugated sheet 1 and flat plate 2
Often have problems with adhesive strength and bonding strength.
Was. [0007] Second, this type is obtained by a conventional manufacturing method.
Core 5 made of fiber reinforced plastic A
Is concerned about the bonding strength and bonding strength from the following aspects as well.
Had been plucked. 5 (3) and (4) of FIG.
For explanation of the conventional example, the corrugated plate 1 and the flat plate 2 as the cell walls 3
(1) is a front view of a main part.
FIG. 2 is an enlarged view of FIG. That is, this species
In the conventional example, as shown in FIG. 4 (2) and FIG.
The concave C and the convex D exist on the surface to be bonded of the corrugated plate 1 and the flat plate 2
However, for example, FIG. 4 (1) and FIG. 5 (3)
As shown in the figure, (4), etc., the surface to be joined is flat
Even if it is, the bonding area is still lacking
It was pointed out that there was. That is, the top table of the corrugated sheet 1
Adhesion applied between the surface or bottom back surface and the flat plate 2
The surface to be joined by the agent B is limited as shown in the figure.
In many cases, the adhesive strength between the corrugated sheet 1 and the flat plate 2 is insufficient.
Was. Therefore, it is composed of such a corrugated sheet 1 and a flat plate 2.
The cell wall 3 has a problem with the adhesive strength / joining strength
There were many things. [0008] Third, the method is further obtained by a conventional manufacturing method of this kind.
Honeycomb core 5 made of fiber reinforced plastic A
Therefore, the size of the cell 4 and the cell size E are large.
That means that the density and compressive strength decrease,
The problem was pointed out. FIG. 6 (2) shows this
Such a conventional example will be described, and the cell size E will be shown.
It is a front view of a principal part. That is, as shown in FIG.
In a conventional honeycomb core 5 of this type, the cell wall 3 is
The thickness of the flat plate 2 interposed between the corrugated plates 1
The size of cell 4 and cell size E are large by the thickness
It will get worse. Therefore, the honeycomb core 5
As the density decreases, the compressive strength of the honeycomb core 5 also decreases.
Was pointed out. [0009] Fourth, conventionally, such a density is
To compensate for the decrease in compressive strength.
For the honeycomb core 5 made of plastic A, post-treatment and
And, by repeating so-called pickling, for reinforcement
Resin on the outer surface of the cell wall 3 composed of the corrugated plate 1 and the flat plate 2
On the other hand, it was additionally attached and impregnated in a large amount. I
However, regarding the conventional example of performing such post-processing
Is a process of repeatedly pickling, depositing a large amount of resin.
It is necessary to impregnate, and the cost will increase accordingly.
Problem was pointed out. Furthermore, such a honeycomb
In the core 5, the ratio of the resin in the fiber reinforced plastic A is
The ratio of fiber base material with higher strength
From this point, there is a difficulty in strength.
Was. Fifth, a fiber-reinforced plastic of this kind in the related art is used.
Regarding the method of manufacturing the honeycomb core 5 made of
Problems were pointed out from the following aspects as well. sand
In other words, in this manufacturing method, expensive adhesive B is inevitably used in large quantities.
Is used for
There was plucking. Further, prior to the inflection with the corrugated sheet 1,
A flat plate 2 is formed from a prepreg-like fiber-reinforced plastic A.
The process of shaping, heating, and curing is required.
It was pointed out that the number of steps was large and the cost was high. The present invention has been made in view of such circumstances, and
It was made to solve the problem of the conventional example, and the fiber
Reinforced plastic plate, uncured, flexible
Prepreg, Already fully cured and moldedwave
After stacking with the board, heat and cure
When, Is characterized.First of all, the surface to be joined of the corrugated sheet
Secondly, it can absorb irregularities and improve the bonding strength.
The bonding area between the flat plates increases, and the bonding strength also increases from this surface.
Third, cell size and cell size are small
No. 4, the density increases and the compressive strength increases accordingly.
In the post-processing, additional resin for reinforcement is added.
The need for impregnation and impregnation is reduced,
No additional adhesive is used and a flat plate is added in advance.
Eliminating the need for heat and hardening processes
Cost-effective, bisect-type fiber reinforced
Proposing a method for manufacturing plastic honeycomb cores
The purpose is to: [0012] [Means for Solving the Problems] To solve such problems.
The technical means of the present invention is as follows. Sand
In addition, this bisect type fiber reinforced plastic
In the method for manufacturing a honeycomb core, first, a resin is applied to a fiber base material.
Flexibility made by combining adhesion, impregnation, mixing, etc.
A prepreg-like fiber-reinforced plastic
Heat and pressurize
By this means, the fiber with corrugated irregularities continuously bent
A corrugated sheet made of fiber reinforced plastic is formed. Next, multiple sheets
ofAlready cured and moldedFiber reinforced plastic
Adhesion, impregnation, mixing, etc. of resin to the corrugated sheet made of
More than oneNot yet curedFlexibility・
viscosityFiber-reinforced plastic with prepreg
And a flat sheet-shaped flat plate
Stack in the shape of a lock. At that time, for each of the corrugated sheets,
It is shifted by half pitch sequentially, and the bottom is
It is assumed that the top portion and the top portion are opposed to each other. Scold
Then, by heating and pressurizing,Each prepreg-shaped flat
Plates are sandwiched between the bottom and top of each fully cured corrugated plate
While being pressed and cured.First, each of the flat plates is
Of the bottom and top of each corrugated sheet based on its flexibility and viscosity
Even if there are irregularities on the surface, it is sandwiched between the bottom and top of each corrugated sheet
The crimped part follows and becomes uneven.In addition, each said flat
The slabs, based on their flexibility and viscosity, have the bottom and top of each corrugated sheet.
Of course not only the part that is sandwiched and crimped
Increased boundaries between parts that are not sandwiched and crimped
And joined with each corrugated sheet.Further, each of the flat plates is
Between the bottom and top of each corrugated sheet based on the flexibility and viscosity of
The part that is rarely crimped and is not crimped
Crushed and thinner than the wall thickness.So, like this
By heating and pressurizing, Opposite bottom and top of each corrugated sheet
Between prepregsPerfectOn each of the plates to be cured,
Each is joined. In this way, the intussusception, hardening, joining
Each of the corrugated plate and the flat plate is defined as a cell wall, and is partitioned by the cell wall.
A planar aggregate of a large number of hollow columnar cells formed,
Bisect type fiber reinforced plastic honeycomb
Obtaining a core. [0013] The manufacturing method according to the present invention is as follows.
So, it becomes as follows. In this manufacturing method, the fiber
Reinforced plastic flat plate, flexible uncured
Use as prepreg. And already molded and hardened
Fiber-reinforced plastic corrugated sheet and this uncured
After heating and pressurizing
And each corrugated plate is joined by
Between the opposite bottom and top of each corrugated sheet
Is joined through. By the way, when joining like this,
The cured prepreg-shaped flat plate is attached to the bottom and top of the cured corrugated sheet.
While being sandwiched between parts, it is heated, pressed, pressed and cured.
You. Therefore, the flat plate is sandwiched between the bottom and top
The thickness of the corrugated part becomes thin, and the bottom and top of the corrugated sheet are concave.
Even if there are protrusions, the part that is sandwiched and pressed follows the unevenness
And, further, from the part thus crimped and crimped
Joining with corrugated sheet even at the border to the part that is rarely crimped
Is done. By following such a process, each corrugated sheet and flat
Bisect type fiber reinforced plus with plate as cell wall
Chick honeycomb cores are manufactured. [0014] BRIEF DESCRIPTION OF THE DRAWINGS FIG.
This will be described in detail based on an embodiment. Figure 1, Figure 3,
FIG. 4 (1), FIG. 2 (2), FIG. 3 (3), FIG. 5 (1)
Figures, (2) and (1) in FIG. 6 show an embodiment of the present invention.
Provide a description of the state. FIG. 1 (1) shows a fiber reinforced plastic
Perspective view of stick, (2) is a perspective view of corrugated sheet and flat plate
FIG. 3 (3) is a front view of corrugated sheets and flat sheets to be stacked.
is there. Figure 3 shows a bisect type fiber reinforced plastic.
FIG. 2 is a front view of a honeycomb core made of a ceramic. Figure 4 shows the cell wall
In other words, the state of the joint between the corrugated plate and the flat plate is shown.
The front view of the main part when the surface is flat.
The front view of the main part when there is a depression on the surface.
It is a front view of the principal part in case convexity exists in the board surface. FIG.
Indicates the joint state between the cell walls, that is, the corrugated plate and the flat plate,
(1) Figure is a front view of the main part, (2) Figure is an enlarged view
is there. FIG. 6A is a front view of a main part showing a cell size.
FIG. This bisect type fiber-reinforced plastic
In the method for manufacturing the honeycomb core 6 made of
As shown in (1) and (2) of Fig.
Flexibility by combining, impregnating, mixing, etc.
Prepreg-shaped fiber reinforced plastic A
The sheet is supplied to a corrugating machine as a material sheet and heated and heated.
By pressing, the corrugated irregularities are continuously bent and formed.
The corrugated sheet 7 made of fiber reinforced plastic is formed. These will be described in more detail. First,
Of fiber reinforced plastic A used in the method of manufacturing
As the base material, glass fiber, Kevlar fiber, carbon fiber
Consider fibers, ceramic fibers, metal fibers, and other various fibers.
It is appropriately selected and used from these. Fiber substrate
Weaving methods include plain weave, satin weave, twill weave, and various other
Weaves are conceivable. And such fiber base
Resin can be attached, impregnated, mixed, etc.
And combined with fiber reinforced plastic A
It is. This resin includes epoxy resin and polyimide resin.
Is typical, but other thermosetting resins and
Thermoplastic resins can also be used. Also, this fiber reinforced plastic
Stick A is uncured or semi-cured that has not yet completely cured
Condition, that is, prepreg with flexibility and viscosity
Be provided. Fiber reinforced plastic A
ing. And, such a prepreg-like fiber strength
Plastic A is used as a base material sheet
Supplied to the forming device. For example, corrugating equipment
Gear and rack, gear and rack, etc.
Prepreg-like fiber reinforced plastic A
Is heated and pressurized while being sandwiched, thereby forming a corrugated plate 7.
Shape. Corrugated sheet 7 made of molded fiber reinforced plastic A
Means that the corrugations are linearly parallel to the short side direction and long
Formed repeatedly at predetermined pitch and height repeatedly in the direction
Be done. The corrugations of the corrugated plate 7, that is, the top and bottom
The cross-sectional shape is typically the trapezoidal shape (half hexagonal shape) shown
But generally triangular, square, and various other shapes
Are also possible. And the fiber formed in this way
The corrugated sheet 7 made of fiber-reinforced plastic A can be further heated.
By this, it is completely cured. The corrugated sheet 7 is formed in this manner.
Is done. Now, in this manufacturing method, next, FIG.
(2) As shown in FIG. 3 and FIG.
Corrugated plate 7 made of fiber reinforced plastic A and resin
A plurality of sheets, which are combined by adhesion, impregnation, mixing, etc.
Uncured prepreg-like fiber strength
And a flat sheet-shaped flat plate 8 made of
They are sequentially stacked alternately in a laminated block shape. That is, it is molded and cured in the above-described steps.
A corrugated sheet 7 cut into predetermined dimensions,
It is cut into predetermined dimensions while maintaining a flexible prepreg shape.
And the flat plate 8 are alternately arranged in a plural number, for example, a large number,
Is accumulated. For each such corrugation,
Is shifted left and right by half a pitch of the wave
And the bottom and the top are paired with each plate 8 interposed therebetween.
Laminated block with space in its entirety
It is piled up in a shape. The corrugated plate 7 and the flat plate 8 are thus stacked.
Is done. Then, in this manufacturing method, heating, pressing
By doing so, between the opposed bottom and top of each corrugated sheet 7
Bonding at each flat plate 8 that cures from prepreg
Is done. That is, as described above,
Each corrugated sheet 7 made of fiber reinforced plastic A,
Each flat plate 8 made of fiber reinforced plastic A
Heating and pressurization. As a result,
Prepreg-shaped flat plates 8 are completely cured, and
Each of the corrugated plates 7 has such a flat plate between the opposed bottom and top.
8 (each corrugated plate 7 and flat plate 8 are joined
). In this manufacturing method, each of these steps is traced.
By doing so, the bisect type fiber shown in FIG.
A honeycomb core 6 made of reinforced plastic A is manufactured.
That is, each of the corrugated sheets 7 stacked, cured, and joined in this manner.
And the flat plate 8 is used as the cell wall 9, and is partitioned by the cell wall 9.
A planar assembly of a large number of hollow columnar cells 10
Honeycomb made of fiber-reinforced plastic A of the eject type
The core 6 is manufactured. The bisect type manufactured in this way is
Regarding the honeycomb core 6 made of fiber reinforced plastic A,
Further details will be described. The honeycomb cores 6 are joined alternately and sequentially.
On the corrugated plate 7 and the cell wall 9 composed of the flat plate 8
A planar collection of a large number of hollow columnar cells 10 formed in sections.
Combine. The cross-sectional shape of the cell wall 9 and the cell 10 is
The trapezoidal shape shown in the figure is typical, but a substantially triangular shape,
A square shape and other various shapes are also conceivable. Soshi
The honeycomb core 6 made of fiber reinforced plastic A
In most cases, a surface plate is in contact with both open end faces.
Used as a combined, honeycomb sandwich panel
You. And, like a general honeycomb core, the weight ratio strength
With excellent rigidity and strength
And is particularly rigid because it is a bisect type.
You. Furthermore, the rectification effect and the surface area per unit volume are large.
In the case of a honeycomb sandwich panel,
Known for its excellent surface accuracy and other characteristics, a wide variety of structures
Used as a material. Bisect type fiber reinforced plastic
The honeycomb core 6 made of Stick A has this configuration.
You. Bisect type fiber reinforced according to the present invention
The manufacturing method of the honeycomb core 6 made of plastic A is as described above.
It is configured as described. So,
You. In this manufacturing method, a flat fiber reinforced plastic A
Plate 8 is used as it is in the form of flexible uncured prepreg
It is. Then, as shown in FIG.
Corrugated sheet 7 made of fiber reinforced plastic A
After laminating the uncured flat plates 8 alternately in sequence,
Each corrugated plate at each flat plate 8 hardened by heat and pressure
7 is joined. That is, the opposite bottom of each corrugated sheet 7
The portion between the top and the top is in contact with each other through each flat plate 8 which hardens in this way.
Are combined. In addition, in such joining, flexibility is increased.
The uncured prepreg-shaped flat plate 8 that has taken on
Heated and pressurized while being sandwiched between the bottom and top of the corrugated sheet 7
Pressed and cured. Therefore, the flat plate 8 is formed at the bottom or top of the corrugated plate 7.
The thickness of the part crimped between the parts becomes thinner,
Even if there are irregularities on the bottom and top of the plate 7, it is sandwiched and crimped
The part follows and becomes uneven, and is further sandwiched in this way.
At the border between the crimped part and the part that is not crimped
Also in this case, it is joined to the corrugated sheet 7. And this
By following the steps as shown in FIG. 3,
Each of the corrugated sheets 7 and the flat sheets 8, which are stacked, hardened, and joined, are combined with the cell walls 9.
Made of bisect type fiber reinforced plastic A
The honeycomb core 6 is manufactured. Now, this manufacturing method
According to the law, the following first, second, third, fourth and fifth
become. First, molded and cured fiber reinforced plus
The outer surface of the corrugated plate 7 made of Tick A, especially the top surface and the bottom surface
That is, irregularities are often formed on the surface to be joined.
You. That is, fiber reinforced plastic A is made of warp or weft.
Adhesion, impregnation, mixing, etc. of resin to the fiber base woven in
More combined. Therefore, such fiber-reinforced
Corrugated sheet 7 molded and cured using plastic A as a base material
Irregularities are formed on the top surface and bottom bottom surface, which are the surfaces to be joined
It is often done. In contrast, this manufacturing method
Has a flat plate 8 made of fiber reinforced plastic A,
Between the corrugated sheets 7 in the uncured prepreg shape
After heating, pressurizing and hardening, the corrugated sheet
7 is joined. Therefore, as shown in FIG.
The top surface and bottom surface of the corrugated plate 7 to be joined are flat.
And a concave C is formed as shown in FIG.
Or a convex D is formed as shown in FIG.
In this case, due to the flexibility of the flat plate 8, such a concave C
And the convex D can be reliably absorbed. That is, the flat plate 8 is heavy
Since it has a prepreg shape with flexibility when stacking and pressing,
Sandwiched between the top surface and bottom surface of corrugated sheet 7 where C and convex D exist
As shown in the figure, the crimped part
After following D, it becomes uneven, and is cured by heating.
Thus, the bonding between the corrugated plate 7 and the flat plate 8 is ensured.
((2) and (3) in FIG. 4 according to the present invention,
The figures (5) and (6) in FIG.
Comparison), the bonding strength between the corrugated plate 7 and the flat plate 8 is improved. There
And made of fiber reinforced plastic A obtained by this manufacturing method.
The honeycomb core 6 has excellent bonding strength between the cell walls 9.
You. Second, in this manufacturing method, the fiber reinforced plastic
Stick A flat plate 8 is prepreg-like with flexibility
As it is, it is piled up with the corrugated sheet 7 that has already been molded and cured,
Heated, pressurized and cured, made of fiber reinforced plastic A
It is joined to the corrugated plate 7. Thus, the flat plate 8 is
When pressurized, the uncured and flexible semi-cured
Since it is a prepreg in a cured state, FIG.
(2) As shown in the figures and the like, the top surface and the bottom back of the corrugated sheet 7
The thickness of the crimped part between the surfaces is
Crushed. Along with this, the wall thickness was reduced like this
Part and the top surface and bottom surface of corrugated plate 7 without being pinched
The boundary (inclined boundary surface) with the part that is not
It becomes the target surface 11 and is joined to the corrugated plate 7. That is, the corrugated plate 7 and the flat plate 8 are
In addition to the surface to be joined (between the top surface and the bottom surface of the corrugated sheet 7),
Bonding is also performed on such an increased bonding target surface 11.
And the number of surfaces to be joined increases. Is it this side
So that the bonding between the corrugated plate 7 and the flat plate 8 is surely performed.
(Figures (1) and (2) in FIG.
Comparison between (3) and (4) in FIG.
Control), the bonding strength between the corrugated plate 7 and the flat plate 8 is improved. There
And made of fiber reinforced plastic A obtained by this manufacturing method.
Of the honeycomb core 6 is also joined from the cell wall 9 from this surface.
Excellent strength. Third, in this manufacturing method, the fiber reinforced plastic
Stick A flat plate 8 made of stick A
As it is in the form of prepreg, it overlaps with the corrugated sheet 7 that has already been formed and cured.
Laminate, heat, press, cure and join with corrugated plate 7
I do. Therefore, the flat plate 8 is placed on the top of the corrugated plate 7 as described above.
The thickness of the crimped part between the front and bottom
Compared to the thickness of the part that was not pressed and crimped like
Become thin. Also, between the top surface of the corrugated sheet 7 and the bottom
Only the thin flat plate 8 is interposed as in
Agent B and the like do not intervene. Therefore, it was obtained by this manufacturing method
The honeycomb core 6 made of fiber reinforced plastic A is
The cell wall 9 is composed of a corrugated plate 7 or a flat plate 8.
Then, as shown in FIG. 6A, the size of the cell 10
Is small, and the cell size E is also small.
FIG. 6A and FIG. 6B according to a conventional example of this type.
And control). Thus, this honeycomb core 6
Increases the density and improves the compressive strength. Fourth, the fiber reinforced material obtained by this manufacturing method
The honeycomb core 6 made of plastic A is
In addition, the compressive strength is improved. Therefore, the post-processing
Adhesion and impregnation of heavy resin onto the outer surface of cell wall 9
The need to tighten is reduced. In other words, this kind of
The honeycomb core 5 made of fiber reinforced plastic A of the conventional example
As a post-treatment, it was immersed in a bath where the resin was stored
Then, by taking out and drying, the corrugated sheet 1 or flat
A resin for reinforcement is provided on the outer surface of the cell wall 3 composed of the plate 2.
Are additionally adhered and impregnated. And this
Such a so-called dob pickling is usually repeated many times
Adhering and impregnating a large amount of resin.
The density of the core 5 is increased to improve the compressive strength.
You. In contrast, the fiber reinforced plastic obtained by this manufacturing method
As described above, the honeycomb core 6 made of Stick A has a density of
And the compressive strength has been improved.
The need for adhesion and impregnation of resin for reinforcement
You. Fifth, in this manufacturing method, the adhesive B is not used.
Not used. That is, in this manufacturing method, the conventional adhesive
Prep with flexibility and viscosity instead of bonding with agent B
And a corrugated plate 8 which is hardened and hardened.
Are adapted to each other. In addition, fiber reinforced plastic A
Plate 8 made of flexible uncured prepreg
As it is, it is stacked with the corrugated sheet 7 that has already been formed and cured,
Heat, pressurize and cure. That is, the flat plate 8 is
Before molding, carry out the steps of molding and curing in advance
The prepreg is stacked on the corrugated sheet 7 without being changed. This
Does not use the adhesive B as described above.
In addition, it is easy and easy to
Honeycomb core 6 made of fiber reinforced plastic A
Can be manufactured. Here, embodiments and application examples of the present invention
Please note. In this embodiment / application example, fiber reinforced plus
Polyamide-imide resin on carbon fiber as Tick A
Used by combining, impregnating, mixing, etc.
Can be And such a fiber-reinforced prepreg
Corrugated molding machine using plastic A as base material sheet
And heat and pressurize. The heating temperature is 100
From 400 to 400 ° C (eg 300 ° C)
Is 0.5kgf / cm^TwoFrom 10kgf / cm^Two(Example
For example, 6kgf / cm^Two) Is set to 10 minutes
To 10 hours (for example, 5 hours). And
Molded and cured fiber reinforced plastic A corrugated sheet 7
Pre-preg shape made of the same fiber reinforced plastic A
After laminating the flat plate 8 as it is, heating and pressurization are performed. So
Is heated from 100 ° C. to 400 ° C. (for example, 300 ° C.).
° C), and the pressing force is 0.05 kgf / cm^TwoOr
10kgf / cm^Two(For example, 4 kgf)
Time is set from 10 minutes to 10 hours (for example, 5 hours)
Is done. By following these steps, the product,
The cured and bonded corrugated sheet 7 and flat plate 8 are used as cell walls 9.
In addition, a honeycomb core 6 made of fiber reinforced plastic A is manufactured.
Was done. The data shown in Table 1 below was obtained in this way.
Honeycomb core 6 and the above-described conventional honeycomb
This is a comparison with the mucor 5. That is, this table
1 is a fiber reinforced plastic to which the manufacturing method of the present invention has been applied and implemented.
The same fiber reinforced plus as honeycomb core 6 made of stick A
Tick A (Polyamideimide resin combined with carbon fiber
And the same settings for temperature and pressure.
Applying the conventional manufacturing method of this kind under force, time, etc.
Honeycomb made of fiber reinforced plastic A obtained by implementation
Comparison with core 5 in cell size E, density, compressive strength, etc.
It was done. In the case of the latter conventional example,
As the adhesive B, a polyamideimide resin is used.
The honeycomb core 5 is manufactured and manufactured.
As a post-treatment, the polyamide
Additional adhesion and impregnation of resin is performed. [0035] [Table 1] [0036] The bisect-type fiber strength according to the present invention
The method of manufacturing a honeycomb core made of plasticized plastic is described above.
As mentioned, the flat plate made of fiber plastic is
Flexible prepregAlready fully cured
Molded inAfter lamination with corrugated sheet, heat and cure
By doing so, the following effects are exhibited. First, a corrugated sheet made of fiber reinforced plastic is used.
It can absorb irregularities on the surface to be joined, improving joining strength
You. That is, molded and cured fiber reinforced plastic
Outer surface of the corrugated sheet made of
Irregularities are often formed on the bottom rear surface. this
In contrast, this manufacturing method uses fiber-reinforced plastic
While keeping the flat plate in a flexible prepreg shape,
Heating, pressurizing and hardening after stacking
Thus, it is bonded to the corrugated plate. So, the flexibility of this flat plate
Nature, it is possible to reliably absorb the unevenness of the corrugated sheet on the surface to be joined.
is there. Therefore, as in the above-mentioned conventional example,
Unevenness on the outer surface of the flat plate hinders the adhesion between the two.
And the bonding area is unevenly distributed or a gap is formed in the bonding area.
The occurrence of poor wearing is reliably avoided. this
As shown, the fiber reinforced plastic obtained by this manufacturing method
Honeycomb core improves the bonding strength between corrugated and flat plates
Therefore, a cell composed of such a corrugated plate and a flat plate
Excellent wall joint strength. Second, the bonding area between the corrugated plate and the flat plate increases.
Also, the bonding strength is improved from this aspect. That is, this
In the manufacturing method, a flat plate made of fiber-reinforced plastic is
While maintaining the prepreg shape,
Bonding between corrugated sheet by heat, pressure and hardening
I do. Therefore, the flat plate is sandwiched between the bottom and top of the corrugated plate and crimped
On both sides of the thinned part
Even at the border to the part that is not sandwiched and crimped,
Become joined. In this way, the flat plate is
Between the top and the top, as well as on both sides.
As a result, the number of surfaces to be joined increases and the joining area increases.
You. Therefore, the flat plate is bonded only between the bottom and top of the corrugated plate.
The corrugated sheet pointed out in the above-mentioned conventional example
The situation where the adhesive strength between the and the flat plate is insufficient is eliminated. This product
Honeycomb made of fiber reinforced plastic obtained by the manufacturing method
A, from this aspect, the bonding strength between the corrugated sheet and
Therefore, a cell composed of such a corrugated plate and a flat plate
Excellent wall joint strength. Third, the cell size and cell size
It becomes smaller, the density increases and the compressive strength improves accordingly.
You. That is, in this manufacturing method, the fiber reinforced plastic is used.
A flat plate made of glass while maintaining the flexible prepreg shape.
By laminating with a plate, heating, pressing, and curing,
Join between corrugated sheet. So the flat plate is the bottom and top of the corrugated
The thickness of the part crimped between the parts is reduced,
Such a flat plate is interposed between the bottom and top of the corrugated plate.
Only. Therefore, as in the above-described conventional example,
In addition, between the bottom and top of the corrugated sheet,
A flat plate with a constant thickness is interposed and has a predetermined thickness
Adhesives are also interposed in such corrugated sheets, flat plates, adhesives, etc.
The following advantages occur when the cell wall is
To reach. That is, the fiber reinforcement obtained by this manufacturing method
The plastic honeycomb core has a thin wall
There is only a flat plate.
Cell wall, the cell size is reduced accordingly.
The cell size is small. So the honeycomb core density
And the compressive strength is improved. Fourth, in post-processing, a tree for reinforcement is used.
The need to add and impregnate additional fat is reduced,
The surface is excellent. That is, obtained by this manufacturing method
The honeycomb core made of fiber reinforced plastic is
Thus, the compressive strength is improved. Therefore, this
As in the conventional example, the resin for reinforcement is
Repeat so-called pickling on the outer surface of the wall many times
Therefore, it is necessary to add and impregnate a large amount
Gone. That is, if additional deposition and impregnation are to be performed
However, the number of times of so-called pickling is small, and the amount of resin is large.
May be reduced, and in some cases additional
It is not necessary to perform the immersion itself. In this manufacturing method,
In this way, the amount of resin used can be greatly reduced, and
The surface is extremely good. Also in fiber reinforced plastic
In some cases, the ratio of the fiber base material of
It is evacuated and is excellent in strength from this aspect. Fifth, without using an adhesive,
This eliminates the need for molding and curing processes.
In terms of cost, it is also excellent. That is, this manufacturing method
In the method, as in the above-mentioned conventional example, an expensive adhesive
Is not used at all, and a flat plate is formed prior to
The process of keeping the shape, heating and curing is not implemented,
Simplified. This manufacturing method is
Excellent strike surface. Thus, in this kind of conventional example,
Effects of the present invention, such as solving all the problems
Is remarkably large.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 provides a description of an embodiment of a method for manufacturing a honeycomb core made of a bisect type fiber-reinforced plastic according to the present invention, and FIG. (2) is a perspective view of a corrugated plate and a flat plate, and FIG. 3 (3) is a front view of a corrugated plate and a flat plate to be stacked. FIG. 2 provides a description of a method of manufacturing a honeycomb core made of a bisect type fiber-reinforced plastic according to a conventional example of this type, and FIG. 2A is a perspective view of the fiber-reinforced plastic;
FIG. 2B is a perspective view of the corrugated sheet and the flat plate, and FIG. 3C is a front view of the stacked corrugated sheet and the flat plate. FIG. 3 is a front view of a bisect type fiber-reinforced plastic honeycomb core. FIGS. 4 (1), (2), and (3) are views for explaining the embodiment of the present invention and show the joining state between the cell walls, that is, the corrugated plate and the flat plate. 1) FIG. 1 is a front view of a main part in a flat case, (2) FIG. 2 is a front view of a main part in a case where a depression exists on the corrugated sheet surface, and (3) FIG. It is a front view of the principal part of. Figure (4), Figure (5),
FIG. (6) is for explaining the conventional example of this type, and shows the state of adhesion between the cell walls, that is, the corrugated plate and the flat plate. FIG. FIG. 5) is a front view of the main part when the corrugated sheet surface has a depression, and FIG. 6 (6) is a front view of the main part when the corrugated sheet surface has a convexity. FIGS. 5 (1) and (2) are views for explaining the embodiment of the present invention, and show the bonding state between the cell walls, that is, the corrugated plate and the flat plate. FIG. Front view of the main part,
FIG. 2 is an enlarged view of FIG. (3) Figure and (4)
The figures are used to explain this kind of conventional example, and show the state of adhesion between the cell walls, that is, the corrugated plate and the flat plate. FIG. 3 (3) is a front view of a main part, and FIG. FIG. FIG. 6 (1) is a front view of a main portion showing a cell size for describing an embodiment of the present invention. FIG. 2 (2) is a front view of a main part showing a cell size for description of this type of conventional example. [Description of Signs] 1 Corrugated sheet (conventional example) 2 Flat plate (conventional example) 3 Cell wall (conventional example) 4 Cell (conventional example) 5 Honeycomb core (conventional example) 6 honeycomb Core (of the present invention) 7 Corrugated sheet (of the present invention) 8 Flat plate (of the present invention) 9 Cell wall (of the present invention) 10 Cell (of the present invention) 11 Surface A to be increased in joining A fiber-reinforced plastic B adhesive C concave D convex E cell size

Claims (1)

(57) [Claims 1] First, a flexible prepreg-like fiber-reinforced plastic obtained by combining resin by adhering, impregnating, mixing and the like to a fiber base material is used as a base material sheet. By supplying to the corrugating machine and heating and pressurizing,
Forming a corrugated sheet made of fiber-reinforced plastic in which corrugations are continuously bent, and then forming a plurality of corrugated sheets of fiber-reinforced plastic which have already been completely cured and formed; A plurality of still unhardened parts by combining, impregnating, mixing, etc. resin
A flat sheet-like flat plate made of fiber reinforced plastic, which remains flexible and viscous due to the formation of a prepreg, is successively stacked in a laminated block shape. Are shifted sequentially by a half pitch of each other, so that the bottom and the top are in a positional relationship facing each other while passing through each of the flat plates, and then heated and pressed to form a prepreg-like shape.
Each flat plate is between the bottom and top of each fully cured corrugated plate.
Since it is pressed and cured while being sandwiched, first, each of the flat plates is based on its flexibility and viscosity.
Even if there are irregularities on the outer surface of the bottom and top of each corrugated sheet,
The part crimped between the bottom and top of the corrugated sheet follows
And each flat plate has a corrugated shape based on its flexibility and viscosity.
Of course, the part crimped between the bottom and top of the
The boundaries between the parts that are not sandwiched and crimped on both sides also increase
Become bonding target surface while being bonded to each said corrugated plate, further, the tabular, based on its flexibility and viscosity, each the wave
The thickness of the crimped part between the bottom and top of the plate
It is crushed and thin compared to the thickness of the part that is not rarely crimped
Thus, by heating and pressing in this way, the opposing bottom and top of each corrugated sheet are joined to each of the flat sheets that are completely hardened from the prepreg shape. The corrugated plate and the flat plate joined to each other are used as cell walls, and a bisect-type fiber-reinforced plastic honeycomb core, which is a planar assembly of a large number of hollow columnar cells defined by the cell walls, is obtained. A method for producing a honeycomb core made of bisect-type fiber-reinforced plastic.