JPS59198137A - Method of bonding prefabricated member - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] In particular, with regard to adhesion, by using a photomelt adhesive with fast initial adhesion and a durable emulsion adhesive in combination, the reliability of adhesion can be improved.
The purpose is to shorten the cent time.

As is well known, the V-Kanoto bending and joining method involves cutting a groove with a V-shaped cross section on the back side of a base material on which a decorative sheet or the like is laminated on the surface. This is a processing method that involves bending and gluing, and is a method often used in the past when manufacturing box-shaped items such as cabinets.

However, when bonding with conventional methods, rubber-based and vinyl acetate-based emulsions are used as adhesives, but rubber-based adhesives have heat resistance, etc., and vinyl acetate-based emulsions have a cent time difference in the bonding process. However, it was impossible to process on the line, and both had problems with productivity.

The present invention solves the above-mentioned drawbacks of the conventional method, and the first feature is the adhesive processing effect due to the combination of a durable ring and reliable emulsion adhesive and a true melt adhesive with good initial adhesion. As a second feature of the present invention, the cut cross-sectional shape of the groove is made into a polygonal shape including a component perpendicular to the base material, taking into consideration the influence of the coating film thickness of the hot melt adhesive, This method improves the dimensional accuracy of the shape and enables separate application of hot melt and emulsion adhesives.

The present invention relates to a method for bonding assembly members, in which a part of the base material is cut out in a groove shape from the back side of the base material on which a decorative sheet is laminated on one surface, adhesive is applied to the cut surface, and the adhesive is then bent and bonded. In this case, the cross-sectional shape of the cut part is made into a polygonal shape including a component perpendicular to the surface of the cutting base material, and the V-shaped groove part of the cut surface is filled with an emulsion-based adhesive, and the other polygonal part including a perpendicular component. This is a method for bonding assembly members, characterized in that the components are bonded using a hot melt adhesive.

The method of the present invention will be explained in detail based on the drawings.

FIGS. 1(a) to (C) are perspective views illustrating a cut cross section of a base material in an embodiment of the cutting and bending adhesion method for a decorative sheet laminated base material of the present invention, and FIG. 1 to do
A base material (1) with a thickness of 9) on which a decorative sheet (2) is laminated.
) Cosmetic the groove (3) on a part of the base material from the back side of )
The groove part (3) has a V-shaped groove part (4), a right-angle component cut inner shape surface (5a), and a right-angle component cut outer shape surface (5b) which is overlapped and joined to this. )-Furthermore, a polygonal cut cross section is formed, such as a square cut inner shape surface (6a) and a square cut outer shape surface (6b) which is overlapped and joined to the square cut inner shape surface (6a). Next, as shown in FIG. 1 (bl), a durable wood emulsion adhesive (7), such as vinyl acetate, is applied inside the V-shaped groove (4), and the polygonal cut cross section is A rapidly solidifying hot melt adhesive (8) is applied to the component cut section (5a).Then, the base material (1) is passed through the groove (3) and inserted into the V-shaped groove (4) as shown in Fig. 1 (C ), and combine the V-shaped slopes of the ■-shaped groove (4) and the cut inner surface (5a) and the outer surface (5b) of the right angle component, and press them from the outside with a roll to join them. In this way, between the slopes of the groove (4), there is an emulsion adhesive (7), on the other hand, the inner and outer surfaces (5a,) of the right-angled component.
, (5b) are filled with hot melt adhesive, and the base material (I) is filled with the decorative sheet (2) laminated on the outside.
) is bent and glued.

Fig. 2 (a, l, (bl are perspective views illustrating cut sections in other embodiments of the method of the present invention; Fig. 2 Fa)
As shown in the figure, a cutting groove (3) is formed in a part of the base material on the back side of the base material (1) on which the decorative sheet (2) is laminated, and the decorative sheet (2) is left behind. In (3), the whole is formed into a V-shape, and a right-angle component cutting internal surface (5C) is cut in a part of one of the slopes on both sides in the horizontal force direction. Next, apply vinyl acetate-based emulsion adhesive (7) to the V-shaped groove (4) of the cutting groove (3), and then apply true melt adhesive (8) to the inside surface (5C) of the right-angled component cut. Then, as shown in Fig. 2(b), fill in the figure 7-shaped groove (
3), the base material 11) is bent from the groove (4), and the slopes on both sides of the groove (3) are overlapped and joined. A vinyl acetate emulsion (7) is filled and bonded between the slopes, and a hot melt adhesive (8) is applied between the inner cross section (5C) cut in a part of the slope and the mountain slope. is adhered in a filled state, and the base material (1) is bent and joined.

FIG. 6 is a side view schematically illustrating the hot melt adhesive coating apparatus used in the method of the present invention, in which (9) is a hot melt applicator (10), a heated hose (111
is a solenoid valve for air supply that operates the nozzle opening/closing valve (13), (121 is an automatic nozzle device, (1a)
is a real melt supply nozzle. Supply nozzle (1a)
Nozzle diameter is 1271000inch + supply air is 5Q/crl, hot melt adhesive application amount is 07~
1.29/m. For example, the hot melt adhesive used is Nisudyne A3711 (manufactured by Sekisui Dyne ■). In addition, emulsion adhesive is CMlooo
(manufactured by Konishi ■), and the application amount was 4 ji /
m is appropriate.

According to the method of the present invention, when performing V-cutting bending of decorative plywood, etc., it has adhesive strength and can be bent and bonded without impairing dimensional accuracy. ■ Use an adhesive such as vinyl acetate emulsion at the bottom of the groove, and during the cutting stage, increase the cutting step to create a gap that absorbs the thickness of the adhesive layer, then apply hot melt separately to that area and press it. By adhering, it is possible to perform a highly accurate joining process that is not affected by the thickness of the adhesive coating. ■Durable emulsion adhesive is used at the bottom of the groove, so the adhesive performance is excellent. Since it is not possible to do so, it can be quickly fixed with true melt adhesive.
Emulsion-based adhesives can be solidified over time, thus increasing production line speed and saving labor in forced drying processes using drying ovens, etc., allowing for efficient bonding and bending of durable assembly members. It is possible.

[Brief explanation of the drawing]

FIG. 1 is a perspective view illustrating a cut cross section of a base material in one embodiment of the method of the present invention, and FIG. 2 is a perspective view illustrating a cross section of a base material cut in another embodiment of the method of the present invention. FIG. 3 is a schematic side view of a true melt adhesive coating apparatus in the method of the present invention. Patent applicant Toppan Printing Co., Ltd. 7-

Claims (1)

[Claims] In an assembly member bonding method, a part of the base material is cut and removed in a groove shape from the back side of the base material with a decorative sheet laminated on the surface, and an adhesive is applied to the cut surface and then bent and bonded.
The cross-sectional shape of the cut part is made into a polygonal shape including a component perpendicular to the surface of the cutting base material, and the V-shaped groove part of the cut surface is applied with an emulsion adhesive, and the other polygonal part including the perpendicular component is hot melted. A method for bonding assembly members, characterized by bonding using a type of adhesive.