JP4022578B2 - Method for manufacturing honeycomb panel - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for manufacturing a honeycomb panel used as a structural material or a heat insulating material for ships, vehicles, buildings, etc., that is, a panel in which face plates are bonded to both surfaces of a metal honeycomb as a core material.
[0002]
[Prior art]
The honeycomb panel is obtained by integrating a face plate made of a face plate such as an aluminum alloy plate with an adhesive on both the front and back surfaces of a honeycomb core made of a metal foil such as an aluminum foil. Honeycomb panels are lightweight, highly rigid, and have excellent performance in sound absorption, so they are used in the building field such as interior and exterior buildings and doors.
[0003]
Conventionally, when manufacturing a honeycomb panel by bonding a face plate to a honeycomb core, generally, the face plate is disposed on both sides of the honeycomb core via an adhesive, and the face plate is adhered to the honeycomb core and heated to adhere the adhesive. It is manufactured by exhibiting the performance and bonding the face plate to the honeycomb core. In this manufacturing method, it is required that the face plate and the honeycomb core are in close contact with each other during bonding. For example, when the face plate is adhered to the honeycomb core and bonded, if there is a portion where the face plate and the honeycomb core are not in contact with each other, the portion becomes an unbonded state, and a high-quality honeycomb panel cannot be obtained. Therefore, a method of bonding the honeycomb panel and the face plate by arranging the face plate on both sides of the face plate and the honeycomb core via the adhesive, pressurizing and heating the sandwich between the hot plates to exert the adhesive ability of the adhesive. Has been done.
[0004]
However, the method of pressurizing with a press as described above to adhere the face plate to the honeycomb core is to apply a load from the outside to crimp the honeycomb core and the face plate, depending on the surface accuracy of the lower base and the upper plate sandwiching the face plate. The flatness of the honeycomb panel is influenced, and the adhesiveness of whether or not the entire surface of the honeycomb panel is uniformly adhered is also affected. In particular, when manufacturing a long honeycomb panel, the lower base and the upper plate sandwiching the face plate must be enlarged, so it becomes increasingly difficult to increase the surface accuracy, and the flatness of the honeycomb panel deteriorates. There is a problem that it is difficult to obtain a uniform honeycomb panel over the entire surface.
[0005]
In addition, the above method has to be performed by hot pressing for each panel in which the honeycomb core and the face plate are stacked, so that the work efficiency is inferior. However, in order to solve this problem, an adhesive is applied to both the face plate and the honeycomb core. A large number of units with face plates arranged through them are stacked, the whole is pressed by means of a turnbuckle method, cold press, etc., and heated in a heating chamber to exert the adhesive bonding ability, and the honeycomb panel and the face plate A method of adhering is proposed. However, this method also has a problem in that the surface accuracy and uniform surface pressure of the lower base and the upper plate sandwiching the face plate cannot be obtained in the same manner as described above, and the flatness of the honeycomb panel is deteriorated.
[0006]
[Problems to be solved by the invention]
The present invention is a method for manufacturing a honeycomb panel by bonding a face plate (face plate) to both surfaces of a honeycomb core with an adhesive, and the flatness is extremely good, and the honeycomb core and the face plate are bonded to the entire surface of the panel, and the adhesive strength is high. An object of the present invention is to provide a method for manufacturing a honeycomb panel by a simple operation.
[0007]
[Means for Solving the Problems]
The present invention relates to a method for manufacturing a honeycomb panel by bonding a face plate to both surfaces of a honeycomb core with an adhesive, and surrounds the side surfaces of the honeycomb core placed on a frame with a frame, and the honeycomb core and the entire surface of the frame on both surfaces The face plate is positioned, and then the inside of the frame is depressurized so that the face plate is brought into close contact with the honeycomb core and the frame, and the adhesive ability of the adhesive applied in advance in this tight contact state is exhibited to bond the honeycomb core and the face plate Then, a T-groove boss is provided on the outer peripheral surface of the frame body, and a load applied to the frame body when the pressure inside the frame body is reduced is fixed to the gantry via a support rod fitted to the T-groove boss. A method for manufacturing a honeycomb panel, wherein the honeycomb panel is received by a support .
[0008]
In the above manufacturing method, a concave groove may be provided on the contact surface of the frame body with the face plate, and an adhesive may be filled in the groove to improve the adhesion between the frame body and the face plate. Further, it provided the flange and notch that opens to the outer periphery of the frame body, the notches and by mounting an O-ring between the flange and the face plate, but it may also be good sealability under decompression.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
In the production method of the present invention, first, the side surface of the honeycomb core is surrounded by a frame, and the honeycomb core and the face plate that covers the entire surface of the frame are positioned on both sides, and then the inside of the frame is evacuated and depressurized. In this method, the face plate is brought into intimate contact with the honeycomb core and the frame body, the adhesive ability of the adhesive applied in advance is exhibited, and the honeycomb core and the face plate are adhered to manufacture the honeycomb panel. The method of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a state in which the side surface of the honeycomb core 1 is surrounded by a frame body 2. The honeycomb core 1 is usually made of a metal foil such as an aluminum foil. The frame 2 is preferably made of a metal such as aluminum. The cross-sectional shape of the frame is arbitrary, but is preferably a quadrangular prism having a hollow portion. 3 is a suction port for decompressing the inside of the frame, and is connected to a vacuum pump at the time of decompression.
[0010]
FIG. 2 is a view showing a part of a cross-sectional view when face plates are positioned on both surfaces of the honeycomb core 1 surrounded by the frame body 2 of FIG. 4 and 5 are face plates. 3 is a suction port connected to the vacuum pump, 9 is a valve, and 6 is an adhesive. 7 is a hollow portion of the frame body 2, and 8 is a hole formed in the frame body 2, and air can flow between the space in the honeycomb core 1 and the hollow portion 7 of the frame body 2, and the suction port 3. It is provided to ensure that An adhesive 6 is present at the portion where the honeycomb 1 and the face plates 4 and 5 are in contact with each other. The adhesive may be applied to the face plate, the honeycomb core, or both. As the adhesive, an epoxy-based, phenol-based, polyurethane-based or the like thermosetting adhesive is preferably used.
[0011]
The vacuum pump connected to the suction port 3 is operated in a state where the face plates 4 and 5 are positioned on both surfaces of the honeycomb core 1 and the frame body 2. Since the space portion of the honeycomb core is depressurized, an atmospheric pressure load acts on the face plate, and the honeycomb core and the face plate are pressure-bonded with a uniform load. Therefore, the flatness of the honeycomb core and the face plate can be obtained. The whole is heated while maintaining this flatness. The adhesive and the honeycomb core that have been applied to the honeycomb core pressure-bonding surface of the face plate in advance act to form a fillet (rise of the adhesive to the side of the core), and the face plates 4 and 5 on both sides are connected to the honeycomb core 1 and the frame. 2 adheres well. The entire heating is continued in this tight contact state, and the adhesive 6 is cured and cured to obtain a honeycomb panel in which the honeycomb core 1 and the face plate 4 and the face plate 5 are firmly bonded to each other.
[0012]
FIG. 3 is a cross-sectional view showing another embodiment of the present invention. The face plate 4 and the face plate 5 are positioned on both surfaces of the honeycomb core 1 surrounded by the frame body 2, and concave grooves 10 are provided on the surfaces of the frame body 2 in contact with the face plate 4 and the face plate 5. The groove 10 is filled with an adhesive 11. Thus, by providing the groove 10 in the frame 2 and filling the groove 10 with the adhesive 11, the adhesive 11 acts as a sealing material, so the inside of the frame surrounded by the frame is When the pressure is reduced, air can be prevented from entering through the gap between the frame body 2 and the face plates 4, 5, so that the pressure reducing operation, and hence the close contact between the frame body 2 and the face plates 4, 5 can be performed smoothly.
[0013]
In FIG. 3, reference numerals 12 and 13 denote notches and collars opened in the outer periphery of the frame body, and are provided at the upper edge and the lower edge. An O-ring 14 is mounted between the gap between the notch and the collar 12 and the face plate 4 and between the notch, the collar 13 and the face plate 5. When the inside of the frame body surrounded by the frame body is decompressed by this O-ring attachment, air can be prevented from entering through the gap between the frame body 2 and the face plates 4, 5. The close contact with the face plates 4 and 5 can be made smoothly. The means for filling the groove 10 with the adhesive 11 and the means for mounting the O-ring may be applied together, or only one of them may be applied.
[0014]
Further, when a face plate clamping clamp is provided at a desired location of the frame body 2 surrounding the side surface of the honeycomb core 1, and the face plates 4 and 5 are positioned on both surfaces of the honeycomb core 1 surrounded by the frame body 2, the face plate 4 and 5 may be crimped to the honeycomb core and the frame body by a clamp for clamping the face plate. FIG. 4 is a sectional view showing an example. In FIG. 4, 15 is a clamp for tightening the face plate, and 16 is a handle for tightening. By screwing the tightening handle 16, the face plate 4 and the face plate 5 are pressed against the frame body 2. And said pressure reduction operation is performed in this crimped state. Since the face plates 4 and 5 are pressure-bonded to the frame body 2, the close contact between the face plate 4 and the face plate 5 can be smoothly performed by the decompression operation. Various types of clamps known in the art are used as the clamp.
[0015]
When the pressure reduction operation is performed to reduce the pressure in the frame body, the face plates 4 and 5 are in close contact with the honeycomb core 1 and the frame body 2, but a load that is drawn into the frame body 2 is applied together therewith. When this load becomes strong, the frame 2 may be distorted. In order to prevent this, in the present invention, a T-groove boss is provided at a desired location on the outer peripheral surface of the frame body 2, and a load applied to the frame body during decompression inside the frame body is fitted to the T-groove boss. via the rod, to receive in a fixed post to the frame. FIG. 5 is a cross-sectional view showing an example thereof. Reference numeral 17 denotes a T-groove boss provided on the outer peripheral surface of the frame. Reference numeral 18 denotes a gantry, and 19 denotes a column fixed to the gantry. Reference numeral 20 denotes a support rod which is screwed to the support column 19 and has a tip fitted to a T-groove boss provided on the outer peripheral surface of the frame. Since the support column 19 receives a load to the inside of the frame body 2 through the support rod 20 during the decompression operation, distortion of the frame body 2 can be prevented.
[0016]
In the production method of the present invention, the inside of the frame body is depressurized to bring the face plate 4 and the face plate 5 into close contact with the honeycomb core 1 and the frame body 2, respectively, and the adhesive ability of the adhesive 6 previously applied in this close contact state is exhibited. The honeycomb core 1 is bonded to the face plate 4 and the face plate 5. In order to exhibit the adhesive ability of this adhesive, it is usually performed by heating the whole in a close contact state. The honeycomb core 1 is bonded to the face plate 4 and the face plate 5 by heating in a close contact state. And strong adhesion | attachment can be performed by hardening an adhesive agent in this adhesion | attachment state.
[0017]
It is preferable to use a planar heater to depressurize the inside of the frame body to bring the face plate 4 and the face plate 5 into close contact with the honeycomb core 1 and the frame body 2 respectively, and to heat the whole in this close contact state. FIG. 6 is a sectional view showing an example. In FIG. 6, 18 is a mount. 21 and 22 are planar heaters, and 23 and 24 are heat insulating materials. First, the heat insulating material 24 is placed on the gantry 18, and the planar heater 22 is placed thereon. On the planar heater 22, the face plate 4 and the face plate 5 are placed in close contact with the honeycomb core 1 and the frame body 2, respectively. Next, a planar heater 21 is placed on the face plate 4, and a heat insulating material 23 is placed thereon. Then, by energizing the planar heater, the adhesive is heated and adhered, and further, the adhesive is cured and cured by continuing the heating, thereby strengthening the adhesion and completing the work.
[0018]
In the above method, the inside of the frame body is depressurized to bring the face plate 4 and the face plate 5 into close contact with the honeycomb core 1 and the frame body 2, respectively, and the whole is heated in this close contact state to exhibit the adhesive ability of the adhesive. While heating the whole, the inside of the frame body may be depressurized and the face plate 4 and the face plate 5 may be brought into close contact with the honeycomb core 1 and the frame body 2, respectively.
[0019]
The heating temperature and time for curing the adhesive are, for example, 3 to 5 hours at 60 to 80 ° C. when a two-component thermosetting epoxy adhesive is used. After a predetermined time has elapsed, that is, after completely bonding, the valve 9 of the suction port 3 is opened to release the reduced pressure state. Finally, the suction port 3 is removed, and this part is waterproofed.
[0020]
Example 1
A heat insulating material and a planar heater were set on the frame. On this surface heater, an aluminum plate plate (face plate) having a length of 3010 mm, a width of 2010 mm, and a thickness of 2 mm was placed. On this plate, a rectangular aluminum box having a length of 3000 mm and a width of 2000 mm was made using an aluminum hollow square column (frame body) having a height of 100 mm, a width of 50 mm, and a thickness of 2.5 mm. The frame was provided with two grooves having a groove depth of 0.3 mm and a groove width of 10 mm on both width surfaces. The frame was provided with notches and collars, and an O-ring with a diameter of 4 mm was attached. A two-component thermosetting epoxy adhesive was applied at a coating amount of 350 g / m ² to the groove portion of the frame and the surface of the aluminum plate plate (face plate) in contact with the honeycomb core. A honeycomb core having a cell size of 3/4 and a foil thickness of 75 μm was placed in a rectangle (frame) in which the frame was formed. On the honeycomb core, an aluminum plate plate (face plate) having the same size as that described above and having the adhesive applied at a coating amount of 350 g / m ² was placed on the surface in contact with the honeycomb core.
[0021]
Honeycomb core and aluminum plate plate while pressing the end of the plate plate at 500mm intervals with a pressing jig provided on the gantry and evacuating from the vacuum exhaust valve attached to the frame to depressurize the frame After confirming the pressure-bonding state of the bonded portion with a hammering test (honeycomb core space vacuum degree 10 Kpa), a planar heater and a heat insulating material were placed on the upper plate and heated (set temperature 60 ° C.). The adhesive was cured in about 30 minutes. Thereafter, the clamping jig was removed from the plate plate, the vacuum exhaust valve was closed to maintain the reduced pressure state, and in this state, the plate was heated and cured for 5 hours to obtain the target honeycomb plate.
[0022]
【The invention's effect】
In the case of manufacturing a honeycomb panel by bonding an adhesive portion between the honeycomb core and the face plate with an adhesive while applying pressure, in the method of the present invention, the honeycomb core is surrounded by a frame body and the inside of the frame body is depressurized. And the frame body and the face plates on both sides, the bonded portion between the honeycomb core and the face plate can be uniformly pressed as compared with the conventional method, so that a honeycomb panel having excellent adhesive strength and flatness can be manufactured. Also, it is possible to seal the leakage of air on the contact surface between the frame and the face plate by forming a groove in the frame and filling the groove with an adhesive or attaching an O-ring to the frame. And can maintain the reduced pressure inside the frame.
In addition, compared to conventional panel manufacturing equipment, there is no need for plate plates and strong fixing brackets that sandwich honeycomb cores and face plates, and at the same time, the amount of heat that heats plate plates is no longer necessary. , not small, the equipment cost and the running cost. Also , in terms of equipment, if an assembly work platform, a surface heater, and a vacuum pump are provided, the panel can be manufactured at the site of use, and transportation costs and other costs can be reduced.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a manufacturing process of the present invention.
FIG. 2 is a cross-sectional view showing the manufacturing process of the present invention.
FIG. 3 is a cross-sectional view showing another embodiment of the manufacturing process of the present invention.
FIG. 4 is a cross-sectional view showing another embodiment of the manufacturing process of the present invention.
Cross-sectional view showing a manufacturing excessive extent of the present invention; FIG.
FIG. 6 is a cross-sectional view showing the manufacturing process of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Honeycomb core, 2 Frame body, 3 Suction port, 4, 5 faceplate, 6 Adhesive, 7 Hollow part of a frame body, 10 Groove, 11 Adhesive, 14 O-ring, 15 Clamp, 17 T groove type boss, 18 Mount 21,22 Planar heater, 23,24 Thermal insulation

Claims (3)

In a method for manufacturing a honeycomb panel by bonding face plates to both surfaces of a honeycomb core with an adhesive, the side surfaces of the honeycomb core placed on a frame are surrounded by a frame, and the honeycomb core and the face plate covering the entire surface of the frame are positioned on both sides Then, the pressure inside the frame body is reduced to bring the face plate into intimate contact with the honeycomb core and the frame body, the adhesive ability of the adhesive applied in advance in this tightly attached state is exhibited, and the honeycomb core and the face plate are adhered to each other, A T-groove boss is provided on the outer peripheral surface of the frame body, and the load applied to the frame body when the pressure inside the frame body is reduced is received by a support post fixed to the gantry via a support rod fitted to the T-groove boss. A method for manufacturing a honeycomb panel. The method for manufacturing a honeycomb panel according to claim 1, wherein a concave groove is provided on a contact surface of the frame body with the face plate, and the groove is filled with an adhesive. The method for manufacturing a honeycomb panel according to claim 1 or 2, characterized in that a notch and a brim that open to the outer periphery of the frame are provided, and an O-ring is mounted between the notch and the brim and the face plate.

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