JP3084516B2 - Bonding method of joints in box production - 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 of bonding a joint portion when a folded box or the like is manufactured by processing a fibrous plate material such as wood or cardboard.

[0002]

2. Description of the Related Art Conventionally, joints such as folded boxes made of wood or cardboard are bonded or stapled, and inexpensive hot melt or aqueous emulsion adhesives are used for bonding. Was used a lot.

[0003]

The above-mentioned bonding using a hot-melt or water-based emulsion-based adhesive is inexpensive and advantageous in terms of adhesive cost, but it takes a long time to fix, and it takes a long time to fix. There is a problem that productivity is lowered because it is necessary to pinch the inter-bonded portion.

[0004] The use of a cyanoacrylate-based adhesive (hereinafter, generally referred to as an instant adhesive) as an adhesive solves the above-mentioned problem of adhesion, but the instant adhesive also has a short adhesion time. However, the workability is good, but the short-time adhesive has a problem in that it is permeable to fibrous materials such as wood and cardboard and its use amount is increased, so that the cost increases and it cannot be used.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a method in which water is sprayed onto an adhesive surface, spray-applied, and then instantaneous adhesive is applied. By permeating the surface, the penetration of the instant adhesive is suppressed, enabling the use of high-viscosity, low-viscosity, and fast-curing adhesives. By doing so, the bonding time can be reduced.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention relates to a method of manufacturing a box having a step of bonding fibrous plate materials, in which water is applied to the bonding surface, and then a cyanoacrylate-based adhesive is applied and bonded.
This is a method of bonding joints in box production.

[0007] Further, after the above-mentioned water is applied, the above-mentioned plate material of the joined portion where the cyanoacrylate adhesive is applied and joined is sandwiched for a short time by a hot plate, and the adhesive surface is adhered by pressing and heating. This is a method of bonding joints in box production.

[0008]

Embodiments will be described with reference to the drawings.
FIG. 1 is a perspective view showing an example of a folded box edge material to which a bonding portion is bonded by the method of the present invention. FIG. 2 is a diagram showing a method of heating a bonding plate material from both sides to accelerate curing of the bonding material and shorten bonding time. This shows a state in which the plate is being pressed by a plate.

In the drawing, reference numeral 1 denotes a folding box edge material, and a plurality of cuts 2 are made in the width direction inside four places corresponding to the bent portion of the band-shaped plate, leaving a small thickness outside, and one of both ends is formed inside. On the other hand, the bonding surfaces 3 and 3 whose outer sides are cut off obliquely are formed, and steam is sprayed on the bonding surfaces 3 and 3.

This steam is applied by heating the water and blowing it out of the outlet, but the amount of application is such that the bonding surfaces 3 and 3 are slightly moist and not too much. Spray water may be sprayed instead of water vapor, or water may be sprayed only on one side on the side to which the adhesive is applied.

Subsequently, an instant adhesive is applied to one of the adhesive surfaces 3,
It is thinly applied with a roller or a spatula, quickly bonded to the other adhesive surface 3, and the bonded portion is pressure-bonded for about 1 to 5 seconds. Use an instant adhesive with a low viscosity and a short curing time.However, even if the viscosity is low, since the water sprayed first has penetrated into the bonding surface, the instant adhesive does not penetrate. And the moisture sprayed in advance acts to accelerate the curing of the instant adhesive.

FIG. 2 shows a hot plate 4 at 50 ° C. to 100 ° C.
4 shows a state in which the sheet 4 is pressed against the outer surface of the plate 1 at the joint. In this manner, when the pressure is applied by the hot plates 4 and 4, the curing of the adhesive is promoted, and the bonding time can be shortened.

FIG. 3 shows another embodiment of the present invention in which a rectangular box is bonded at a corner portion thereof.
The bent portion 2a is bent at a right angle by making a 90 ° cut in the inside, leaving a little outside of the plate thickness, and furthermore, the bonding surface 3a cut off to 45 ° with the outside of the plate thickness being the front end. , 3a to form the two bonding surfaces 3a, 3a.
After spraying water vapor on a, an instant adhesive is thinly applied to one of the adhesive surfaces 3a and immediately bonded to and bonded to the other adhesive surface 3a to form one corner.

[0014]

The present invention is embodied in the form described above and has the following effects.

Conventionally, the instant adhesive which was expensive and could not be used because of its high cost can be prevented from penetrating into the application surface by applying water to the adhesion surface prior to application. Therefore, a low-viscosity adhesive having a short adhesive curing time can be used, and the low viscosity allows for a thin coating, so that the consumption can be greatly reduced and the bottleneck in cost can be eliminated.

Since moisture for accelerating the curing of the instant adhesive is applied to the bonding surface in advance, it is possible to further shorten the bonding and curing time and increase the productivity.

Since the amount of the instant adhesive applied is small, there is no occurrence of a whitening phenomenon in which the extra instant adhesive oozes out around the bonding surface and whitens.

By sandwiching the joint with a hot plate, the adhesive curing time can be further reduced, and the productivity can be further increased.

[Brief description of the drawings]

FIG. 1 is a perspective view of a folding box to which joints are bonded by a method of the present invention.

FIG. 2 is a diagram showing a state in which a joint of FIG. 1 is pressed by a hot plate.

FIG. 3 is a perspective view showing a folding box with a corner portion bonded as another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Folded box edge material 2 Cut 3 Adhesive surface 4 Hot plate

Claims (2)

(57) [Claims] The present invention relates to a method of manufacturing a box having a step of bonding fibrous plate members, wherein water is applied to an adhesive surface and then a cyanoacrylate adhesive is applied and bonded. Bonding method. 2. In the manufacture of a box having a step of bonding fibrous plate materials, water is applied to the bonding surface, and then a cyanoacrylate adhesive is applied and bonded, and the plate material at the bonding portion is heated with a hot plate. A method for bonding a joint in box production, wherein the bonding is performed by pressing and heating the bonding surface for a short time while holding the bonding surface.