JPS6321615B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for manufacturing a composite panel using a core material partitioned into a large number of cells by partition walls partitioned in the thickness direction, such as a honeycomb core.

Various composite panels using core materials partitioned into a large number of cells, called honeycomb cores, roll cores, etc., have been proposed in the past.

However, when attaching various surface materials to the core material, if adhesive is applied to the core material side, the adhesive application area is too small, resulting in adhesion on thin lines and surfaces.
The adhesive strength was not necessarily sufficient.

Furthermore, when the adhesive is applied to the surface material side, the adhesive is also applied to areas other than the area to be adhered to the core material, resulting in a large amount of adhesive being wasted. Also, when paper or other material is used as the surface material and emulsion-type adhesive is used, the more adhesive is applied, the more likely it is to be affected by moisture in the adhesive, and the core material on the surface may be affected. This caused marks to appear and the panels to warp or warp.

The present invention eliminates the above-mentioned drawbacks from the viewpoint of laminating equipment, and enables the core material and surface material to be firmly bonded,
It is an object of the present invention to provide an apparatus for manufacturing composite panels that have a flat surface and are free from distortion and deformation.

The present invention will be explained in detail below with reference to the drawings.

First, FIG. 1 is an explanatory diagram showing an example of a composite panel manufacturing apparatus of the present invention.

In other words, when applying adhesive to both sides of a core material, there is a lot of waste if the adhesive is applied to the surface material, whereas if the adhesive is applied to the core material side, the adhesive area is small and the adhesive strength is reduced. Since it has the disadvantage of being weak, we came up with the idea of increasing the bonding area and increasing the bonding strength by pressing and bending the edges of the partition walls on the front and back sides of the core material.

That is, the core material 1 is slightly thicker than the predetermined thickness.
By passing through the press-bending/applying device 4, the edges of the partition walls on the front and back sides of the core are pressed and bent to increase the adhesive application area on the front and back sides of the core, as shown in FIG.

At the same time, a resin film is formed on the surface by applying adhesive to the edge of the core preheated by the first core preheating device 3, and the adhesive in the adhesive applied later is applied. This can prevent the core material from absorbing moisture.

Next, the core material 1 whose edges are pressed and a resin film is formed on the surface thereof is fitted into a predetermined frame member 2, and then conveyed to the adhesive coating device 6. If you use an emulsion type adhesive when the core material is made of paper, it will absorb moisture in the adhesive and cause warping or distortion after the panel is processed. By heating the surface to be coated with a heater before applying the adhesive, and creating a thin film on the core material surface as soon as the adhesive reaches the core material surface to prevent moisture from penetrating, there will be less deformation after processing.

Therefore, by providing the second core material preheating device 5 immediately before the adhesive coating device 6, it has become possible to prevent the influence of moisture.

This treatment has already been carried out in the first core material preheating device 3 and the pressing/bending/coating device 4, but the coating device 6
The amount of adhesive applied by the pressing and bending/applying device 4
Since the amount is much larger than that applied in the previous step, the same preheating is performed here as well in an attempt to prevent the effects of moisture. The first core material preheating device 3 heats the adhesive application surface of the core material 1 as shown in FIG. 1, so when applying adhesive to both sides at the same time as shown in FIG. A core material preheating device 3 is provided above and below the belt. Note that if a device with a large heating capacity is used, such as the second core material preheating device 5 in FIG. 1, heating from only one side is sufficient.

Note that, as shown in FIG. 1, if the press-bending and coating device is placed on a separate line from each subsequent device, the work of fitting the core material 1 into the frame crosspiece 2 before transporting it to the coating device 6 can be done. This can be done as desired, but if it is more advantageous to incorporate all the devices into the same line, the fitting of the core material and frame crosspiece between the press-bending and coating device 4 and the second preheating device 5 may be performed. Provide equipment.

By applying the adhesive twice in this way, the effects of moisture in the adhesive can be better prevented than when applying a large amount of adhesive at once, and the adhesive The amount of agent applied can also be increased.

The reason why adhesive is applied only to the core material during the first application is that the frame frame has a certain amount of area, so if you apply adhesive twice, the amount of adhesive applied will be excessive. This is because the finish becomes poor due to aging.

Further, in the example shown in FIG. 1, the adhesive is applied only from the top surface, so after application, the core material 1 is turned over and the adhesive is applied to the remaining surfaces as well. Incidentally, as shown in FIG. 3, the adhesive can also be applied to both the front and back sides at the same time. Note that if a net-like belt is used for conveyance between the press-bending/coating device 4 and the coating device 6, the adhesive will not adhere to the belt.

The adhesive is supplied by an adhesive supply device 7, but of course it may be supplied manually without using such a device.

In addition to the core material having a hexagonal cross-section like a honeycomb core, known core materials having a triangular, quadrangular, other polygonal, circular, or other cross-sectional shape can be used.

The core material 1 and frame crosspiece 2 coated with adhesive in the manner described above are sent to a movable pressure device 8, and a surface material 9 is superimposed on the front and back sides of the core material 1 by a hot roll press 11 at the entrance of the processing device. Ru.

Immediately before the facing material 9 is inserted into the movable pressurizing device 8, it is heated by a facing material preheating device 10. The reason why the surface material 9 is heated here is to remove the influence of moisture in the adhesive, similar to heating immediately before applying the adhesive to the core material.

The core material 1 and the frame crosspiece 2 on which the surface material 9 is stacked are firmly integrated with the surface material while passing through the movable pressure device 8, and are cooled to form a composite panel 12, which is then passed through the cutting machine 13. The surface material is then cut into sheets and sent to the decorative cutting process.

The movable pressurizing device 8 is a belt-type processing device in order to obtain high productivity production speed over a short distance and to prevent peeling of the surface material due to expansion of air in the core material. The belt is preferably made of an elastic material such as rubber. The roll that drives this belt is a highly versatile roll that can be used as both a heating roll and a cooling roll.

By using the apparatus of the present invention as described above, the following effects can be obtained.

Even if emulsion-type adhesives are used to manufacture composite panels with paper core materials, the moisture in the adhesive may cause the panel to warp or distort, and the core material may leave marks on the panel surface. Does not cause any problems.

Adhesive can be applied without waste, and the amount of adhesive used can be reduced.

Composite panels can be manufactured continuously.

[Brief explanation of the drawing]

The drawings are schematic diagrams illustrating an example of the process of the method of the present invention, and FIG. 1 is an explanatory diagram showing an example of the apparatus for manufacturing a composite panel of the present invention, and FIG. An explanatory diagram showing before and after bending, Fig. 3 is an explanatory diagram of a press-bending and applying device that can simultaneously apply adhesive to the front and back sides of the core material, and Fig. 4 shows the preheating of the first core material on the top and bottom of the belt. Explanatory diagrams in the case where the device 3 is provided are shown respectively. DESCRIPTION OF SYMBOLS 1...Core material, 2...Frame crosspiece, 3...First core material preheating device, 4...Press bending and coating device, 5...Second core material preheating device, 6...Adhesive coating device, 7 . . . Adhesive supply device, 8 . . . Movable pressure device, 9 . . . Surface material, 10 .

Claims (1)

[Claims] 1. An apparatus for manufacturing a composite panel using a core material partitioned into a large number of cells by partition walls partitioned in the thickness direction such as a honeycomb core, which comprises: a pressing and bending/applying device that presses and bends an edge and simultaneously applies adhesive to the pressed and bent edge;
A first core material preheating device provided immediately before the press bending and coating device, a second core material preheating device provided next to the press bending and coating device, and immediately after the second core material preheating device. A coating device for only applying adhesive, a hot roll press provided after the coating device, a movable pressure device following the coating device, and a device immediately before the surface material is inserted into the movable pressure device. 1. A composite panel manufacturing device comprising: a surface material preheating device provided at a position. 2. The composite panel manufacturing apparatus according to claim 1, wherein the first core material preheating device and the pressing/bending/applying device are located on a separate line from other individual devices.