JPH0417992B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for adhesively forming sanderch structural panels. Sandwich structure panels (hereinafter simply referred to as "panels"), which have a core material made of a lightweight material such as honeycomb material or plastic foam, and outer covering plates made of metal, plastic, etc. on both sides, have conventionally been generally used. After applying the adhesive to the desired adhesive-coated surface of the core material or outer cover plate, temporarily assembling it, and applying pressure with a press or simultaneously heating it with an appropriate heating means to harden the adhesive. It was adhesively molded.

Therefore, in such a manufacturing method, for example, if the panels to be adhesively molded are flat, and if they are small and have different thicknesses, the press capacity may not be sufficient. Even if there is a material, it is not possible to bond and mold the material at the same time, resulting in poor work efficiency. In other words, when attempting to apply pressure to materials with different thicknesses at the same time, the application of pressure becomes uneven, often resulting in uneven adhesion, molding distortion, and the like. In addition, since the panel must be adhesively molded by interposing an adhesive molding die between the press surface and the panel surface whose thickness continuously changes gradually due to one surface being curved, In the case of small-volume production, a large amount of money is required to make molds, so the panel has the drawback of being extremely expensive.

The present invention has been made in view of the above-mentioned circumstances, and consists of applying an adhesive to the adhesive-applied surface of the core material or the outer covering plate, and temporarily assembling panels of different thicknesses to one side of the other. A honeycomb pressing material made of a honeycomb material having a compressive strength lower than that of the panel and formed to an appropriate thickness is interposed between the surface and the pressing surface, and the honeycomb pressing material is set on the pressing surface, and the honeycomb pressing material is pressed by pressing. The adhesive is cured while applying pressure to buckle the cell walls located in the parts of the material corresponding to the panels to an appropriate depth, and the panels are adhesively molded to reduce the thickness. It is possible to bond and mold different small flat panels at the same time, thereby making it possible to significantly improve work efficiency, and also,
Even in the case of panels where one side is curved and the thickness gradually differs, such panels can be adhesively molded without the need for adhesive molding molds, and the large amount of time required for mold production is eliminated. The object of the present invention is to provide a method for adhesively molding a panel, which can save time and cost.

The present invention will be described below based on embodiments shown in the drawings.

In FIGS. 1a and 1b, 1, 2, and 3 are respectively core materials 1a, 2a, and 3a made of lightweight materials such as honeycomb material and plastic foam, or outer sheaths made of thin plate materials such as metal and plastic. The panels 1, 2, and 3 have different thicknesses T1, T2, and T3, which are temporarily assembled by applying an adhesive to the adhesive-coated surface of at least one of the plates 1b, 2b, and 3b. is lower press 4
is set on the press surface 4a of. Reference numeral 6 denotes a honeycomb pressing material interposed between the press surface 5a of the upper press 5 and the panels 1, 2, and 3. , 2, and 3, and its thickness is at least as large as that of all panels 1, 2, and 3 in the process described below.
A state in which the cell wall located at a location corresponding to 3 is buckled 6b to a predetermined depth (state in FIG. 1b)
In this case, the cell wall 6a located at the portion corresponding to the panel 2 having the maximum thickness T2 is formed to a thickness such that some unbuckled portions remain.

Next, in order to press each panel 1, 2, 3 set in the state shown in FIG. , the honeycomb pressing member 6 abuts the outer cover plate 2b of the panel 2 having the shortest distance from the honeycomb pressing member 6. If the pressing surface 5a is further moved downward, the compressive strength of the honeycomb pressing material 6 is weaker than that of the panel 2, and the cell walls 6a on the side of the pressing surface of the honeycomb pressing material 6 with the panel 2 are pressed. Since a larger load per unit area is applied than the cell wall 6a on the surface 5a side, the cell wall 6a located at the portion corresponding to the outer cover plate 2b is buckled 6b by the outer cover plate 2b, and the honeycomb pressing member 6 moves downward. Continue. On the other hand, the panel 2 is pressurized by the reaction force generated when the honeycomb pressing member 6 is buckled 6b.
The outer cover plate 2b and the core material 2a are pressed together. By further moving the pressing surface 5a downward, the panel 3 that is next closest in position to the honeycomb pressing member 6 is pressed in the same manner as the panel 2 described above. In this way, all the panels 1, 2, and 3 set on the pressing surface 4a are pressurized in order from the panel closest to the honeycomb pressing member 6, and all the panels 1, 2, 3 is uniformly pressurized as shown in FIG. 1b. This uniform pressurization will be explained in more detail here. First, the honeycomb material constituting the honeycomb pressing member 6 is used, for example, as a shock absorber, and as is well known, the cell walls 6a continuously buckle 6b to absorb impact energy.
And in the process, the honeycomb material buckles 6
Regardless of the overall progress of cell wall 6a
It has the characteristic that impact energy is uniformly absorbed until all of the buckling 6b occurs, and the load required for buckling 6b is always constant. Therefore,
By using the honeycomb pressing member 6 having such characteristics, panels 1, 2, and 3 having different thicknesses can be formed.
can be pressurized simultaneously and uniformly. Now, maintain this pressurized state, or
Furthermore, all panels 1, 2, and 3 are cured by heating with appropriate heating means and curing the adhesive.
is adhesively molded. Note that during adhesion, since the honeycomb pressing material 6 has high thermal conductivity, the above-mentioned heating is performed efficiently. Therefore, a honeycomb material having an appropriate compressive strength is selected and the honeycomb pressing material 6 is
By forming the adhesive, it is possible to easily obtain the optimum adhesive pressure, and therefore it is possible to easily adhesively mold a panel with excellent adhesive strength.

Note that the thickness of the honeycomb pressing member 6 is, for example,
Once used, the cell wall 6a at the maximum buckling part 6b
Even if the thickness of the remaining unbuckled part is buckled to an appropriate depth 6b in order to press the maximum thickness part of the panel to be bonded and formed next, some unbuckled part still remains. When the thickness is formed so that the panel pressure surface of the honeycomb pressing member 6, which has an uneven shape after use, is press-worked to buckle 6b up to approximately the maximum buckling portion 6b, and approximately the entire surface thereof is After smoothing the surface, the press is operated to press each set of panels, and as in the previous embodiment, each panel is uniformly pressed by the buckling reaction force. Therefore, when the honeycomb pressing material 6 is formed to such a thickness, it can be used again, so there is no need to set it each time, and the number of steps for setting it can be reduced.

Figures 2a and 2b show an example of bonding and molding a panel with one side having a curved surface and gradually varying thickness.As shown in Figure 2a, the temporarily assembled panel The smooth surface side of the panel 11 is set on the press surface 4a of the lower press 4, and a honeycomb material having an appropriate compressive strength and a suitable thickness is formed between the press surface 5a of the upper press 5 and the curved side outer cover plate 11b of the panel 11. If the upper press 5 is operated to move the press surface 5a downward, the cell walls 6a of the honeycomb press member 6 will be aligned with the panel 11, as in the previous embodiment. The panels 11 are buckled 6b sequentially starting from the closest positions, and the panels 11 are uniformly pressed by the buckling reaction force of the cell walls 6a, and the panels 11 are bonded and molded.

As explained above, according to the method of the present invention, sand german structural panels of different thicknesses can be fabricated by using a honeycomb pressing material, which absorbs impact energy uniformly and has the characteristics that the load required for buckling is always constant. , adhesive molding can be performed while applying pressure simultaneously and uniformly at the optimal adhesive pressure. Therefore,
The occurrence of uneven adhesion, molding distortion, etc. can be prevented, and work efficiency can be significantly improved. In addition, in the case of a sandwich structure panel in which one side is curved and the thickness continuously varies gradually, the sandwich structure panel can be adhesively molded without the need for an adhesive molding mold. Since it is possible to do so, it has significant effects, such as the ability to save a large amount of time and cost required for mold production.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIGS. 1a and 1b are cross-sectional views sequentially showing the main manufacturing steps of a flat sandwich structure panel, and FIGS. 2a and 2b are
FIG. 2 is a cross-sectional view sequentially illustrating the main manufacturing process of a sandwich structure panel having a curved surface on one side. In the figure, 1, 2, 3, 11 are Sanderutsch structure panels, 1a, 2a, 3a are core materials, 1b, 2b, 3
b and 11b are outer cover plates, 4 is a lower press, 5 is an upper press, 4a and 5a are press surfaces, 6 is a honeycomb pressing member, 6a is a cell wall, and 6b is a buckled cell.

Claims (1)

[Claims] 1 Apply adhesive to the appropriately adhesive-coated surface of the core material or outer cover plate, and temporarily assemble sanderch structure panels of different thickness between one of the surfaces and the pressed surface to form the sanderch structure. A honeycomb pressing member made of a honeycomb material having a compressive strength lower than that of the panel and having an appropriate thickness is set on the pressing surface with a honeycomb pressing member formed to an appropriate thickness, and a portion of the honeycomb pressing member corresponding to the sandwich structure panel is pressed by pressing. Adhesion of the sanderch structural panel, characterized in that the sanderch structural panel is adhesively formed by curing the adhesive while applying pressure so as to buckle cell walls located at appropriate depths. Molding method.