JPH072387B2 - Honeycomb panel manufacturing method - Google Patents

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 panel, and more particularly, to a method for bonding a face plate and a core in a method for manufacturing a honeycomb panel in which an adhesive is applied to a face plate and bonded to a honeycomb core. Regarding improvement.

[0002]

2. Description of the Related Art A honeycomb panel 1, as shown in FIG. 2, has a honeycomb core 2 made of an aluminum foil having a thickness of 50 to 100 μm and a face plate 3 made of an aluminum alloy plate bonded to both sides of the honeycomb core 2. Because of its light weight, high rigidity and excellent sound absorption,
It is used in the construction field such as partitions and doors.
Generally, the honeycomb panel is formed by applying adhesive at predetermined intervals on strip-shaped aluminum foil, laminating the adhesive-applied portions in a zigzag pattern, and then partially adhering the adhesive. To expand the parts other than the adhesive application part into a hexagonal shape, or to bond the parallel parts of aluminum foil that has been processed into a corrugated shape in advance to form a honeycomb core and apply the adhesive to the face plate to form the core. It is done by bonding to.

When the face plate is bonded to the honeycomb core, since it is difficult to apply a highly viscous adhesive to the face plate, a thermoplastic resin or the like is usually provided between the honeycomb core 2 and the face plate 3 as shown in FIG. As shown in FIG. 4, by interposing a film-like adhesive 5 made of a material, it is sandwiched between hot plates 7 and heated to a temperature of, for example, 150 to 200 ° C. by hot pressing, and pressure is applied to melt the adhesive. Was being bonded by. However, in this method, it is necessary to cut the adhesive film according to the panel shape to be preformed,
Large loss of adhesive. Since hot pressing must be performed on each panel in which the core and the face plate are stacked, work efficiency is poor. When manufacturing a honeycomb panel in which a face plate is bonded to a honeycomb core having the shape members 4 arranged at the end portions, only a shape member having the same thickness as the honeycomb panel can be arranged. Due to high temperature heating, especially in the case of a panel with a profile, it is easy to cause distortion in the panel due to the difference in thermal expansion between the profile and the core, and it is necessary to correct it.
There are various problems.

It is also possible to apply a solution type adhesive containing a solvent to the face plate by a spray method or a roll method, and stack and heat and press the honeycomb core to bond them, but a solution type adhesive was used. In this case, gas is generated due to volatilization of the solvent at the time of adhesion, which causes troubles.Therefore, it is essential to punch out a large number of vent holes in the core to expel the gas, and the strength of the core is reduced. The airtightness is also lost, and the corrosive medium may invade from the ventilation holes to corrode the core, so that a problem is likely to occur when the honeycomb panel is applied to the construction field such as interior and exterior materials.

[0005]

DISCLOSURE OF THE INVENTION The present invention solves the above problems in the conventional method for manufacturing a honeycomb panel, particularly the bonding between the honeycomb core and the face plate, and a method of applying a solventless adhesive to the face plate. Was developed to enable the use of a honeycomb core having completely closed cells with no air holes, and its purpose is to improve work efficiency and to provide a shape to be arranged at the end of the core. The size of the material can be freely selected, there is little distortion due to low temperature heating, and the face plate is bonded to the core that has a completely sealed cell, and it is possible to mass-produce panels with excellent strength, airtightness, and corrosion resistance. Another object of the present invention is to provide a method for manufacturing the honeycomb panel.

[0006]

In order to achieve the above object, a method of manufacturing a honeycomb panel according to the present invention is a method for manufacturing a honeycomb panel in which a face plate is bonded to a honeycomb core to form a honeycomb panel. The basic feature of the structure is to stack a number of laminated face plates on both sides of a honeycomb core and heat them in a pressurized state. Another feature of the composition is that the agent is a two-component epoxy adhesive that does not contain a solvent and can be cured at room temperature, and that heating is performed at a temperature of 100 ° C. or less.

As shown in FIG. 1, a face plate 3 coated with an adhesive is placed on both sides of a honeycomb core 2 having a shape member 4 at the end as required, and these panels 1 are laminated to form a stack. It is charged into the heating furnace under pressure. Reference numeral 6 denotes a spacer that is inserted to adjust the difference between the thickness of the shape member 4 arranged at the end of the core 2 and the thickness of the core 2. The size of the shape member 4 can be increased by inserting the spacer. Can be freely selected. Pressurization of the laminated panels can be performed by, for example, adding a weight from above or tightening from above and below by means of bolt members and nut members.

The adhesive preferably used in the present invention is a room temperature curable two-component type epoxy adhesive composed of a main agent containing a modified epoxy resin as a main component and a curing agent containing a modified aliphatic polyamine as a main component. Is selected. Two-component epoxy adhesives are well known, and they are a mixture of a main agent and a curing agent that react with each other just before use, and are applied, adhered, and cured at room temperature or by heating. It is impossible to apply as it is to the surface of a face plate of, for example, a face plate made of an aluminum plate having a thickness of 0.5 to 1 mm and having a considerable surface area. The inventors have homogenized the main agent and the curing agent by stirring under specific heating and pressurizing conditions, respectively, and feed the stirred and homogenized main agent and the curing agent under pressure, respectively, and mix them. Found that it is possible to realize industrial application work of the adhesive to the face plate by pumping and applying this adhesive under a high pressure of 100 atm or more,
I applied for a patent separately.

The present invention is based on the fact that a method for applying the above-mentioned solvent-free two-pack type epoxy adhesive to the surface of the face plate has been developed. When using this two-pack type epoxy adhesive, 100 ℃ or less, preferably 50
Since it becomes possible to bond by heating at ~ 80 ° C, it does not require high-temperature heating as in the past, and furthermore, for example, about 50 to 60 laminated panels are pressed and heated at one time, so the heating speed in each part of the panel As a result of the difference in the cooling rates being dispersed and uniform, the problem that thermal distortion occurs in the bonded honeycomb panel is solved. Further, more uniform heating and cooling can be performed by adjusting the heating rate and the cooling rate of the heating furnace according to the number of laminated panels.

The adhesive is applied to the face plate by spraying the adhesive onto the face plate at a pressure of 100 atm or more. The adhesive may be supplied to the face plate by a roller method. Specifically, the face plate is passed between the upper and lower rolls, the adhesive is supplied to the upper roll, and the adhesive is applied to the surface of the face plate through the upper roll.

[0011]

The honeycomb panel manufacturing method of the present invention comprises a panel having the above-mentioned structure, in which a face plate coated with an adhesive is laminated on both sides of a honeycomb core on which an end portion is provided with a profile if necessary. Since a large number of layers are laminated and the core and face plate are bonded by heating in a pressurized state, work efficiency is excellent, and by inserting a spacer, the size of the profile placed at the end of the core can be freely set. Can be selected, because the adhesion is performed by heating at a low temperature, the occurrence of thermal strain is small, and since a large number of panels are laminated, the difference in the heating and cooling speeds of each panel part is dispersed and uniformed, The problem that distortion occurs due to the difference in thermal expansion is solved. Since a solventless adhesive is used, no gas is generated due to volatilization of the solvent, so the honeycomb core can be made up of completely closed cells without air holes, strength, airtightness, and corrosion resistance. An excellent honeycomb panel can be obtained.

[0012]

EXAMPLES Examples of the present invention will be described below. A base compound consisting of modified epoxy resin and a curing agent consisting of 80 to 90 wt% of modified aliphatic polyamine and 5 to 10 wt% of tertiary amine are stirred and homogenized at a temperature of 40 ° C and a pressure of 5 atm, respectively, and then the same temperature is applied. While maintaining the same pressure, the mixture was pressure-fed by a gear pump, and both were mixed at a mixing ratio (weight ratio) of 100: 100.
Then, the adhesive formed by mixing is heated at a temperature of 30 ° C. for 19
Aluminum alloy (JIS 5052 alloy) at 0 atmospheric pressure
It was applied to the surface of the face plate (0.8 mm thick) by a spray method.

As shown in FIG. 1, a face plate coated with an adhesive is formed from an aluminum foil having a thickness of 76 μm and having aluminum profile members of various shapes arranged at the ends thereof.
Stacked on a / 8 inch fully sealed honeycomb core, 50 sheets of these panels are laminated as shown in Fig. 1, tightened by bolts and nuts from above and below to pressurize, put in a heating furnace and heated to 70 ° C. Heated for 5 hours. The honeycomb panel thus obtained had a core-faceplate tensile shear bond strength of 30 kgf or more, sufficient adhesive strength, and a honeycomb panel excellent in strength and airtightness was obtained.

[0014]

As described above, according to the method for manufacturing a honeycomb panel provided by the present invention, a large number of panels in which face plates coated with an adhesive are stacked on a honeycomb core are stacked and heated at a low temperature. The efficiency is excellent, and the problem that the honeycomb panel is distorted due to the difference in thermal expansion due to the difference in the heating and cooling rates of the respective panels being dispersed and made uniform is solved. Since a solvent-free adhesive can be used and the honeycomb core can be composed of completely closed cells without air holes, a honeycomb panel excellent in strength, airtightness, and corrosion resistance can be obtained.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a laminated state of a panel of the present invention.

FIG. 2 is a perspective view of a honeycomb panel.

[Fig. 3] Fig. 3 is an explanatory view showing a conventional bonding method of a honeycomb core and a face plate.

FIG. 4 is a partial cross-sectional view showing a conventional method of bonding a honeycomb core and a face plate.

[Explanation of symbols]

 1 Honeycomb Panel 2 Honeycomb Core 3 Face Plate 4 Shape Material 5 Adhesive Film 6 Spacer 7 Hot Plate

Claims (4)

[Claims] 1. A method for manufacturing a honeycomb panel in which a face plate is bonded to a honeycomb panel to form a honeycomb panel, wherein a large number of panels in which face plates coated with an adhesive are laminated on both sides of a honeycomb core are stacked and heated under pressure. A method for manufacturing a honeycomb panel, comprising: 2. The method for manufacturing a honeycomb panel according to claim 1, wherein a face plate is superposed on a honeycomb core having a shape member arranged at an end thereof. 3. The adhesive is a two-component epoxy adhesive which does not contain a solvent and can be cured at room temperature.
A method for manufacturing the described honeycomb panel. 4. The method for manufacturing a honeycomb panel according to claim 3, wherein heating is performed at 100 ° C. or lower.