JPH07112410A - Manufacture of flush panel - Google Patents

Abstract

PURPOSE:To continuously manufacture panel by a method wherein non-mixing type adhesive consisting of two liquids, A and B, both of which are reactive with each other, is used so as to pile up core material and surfacing materials under the condition that the liquid A is applied to the front surface of the core material and the liquid B is applied to the rear surface of the surfacing material in order to move both the materials under overlapped state in a vertical pair of belt-conveyor devices equipped with pressing means so as to bond both the materials together under pressure. CONSTITUTION:Non-mixing type adhesive consisting of two liquids A and B, both of which are reactive with each other, is used. Therefore, under the condition that the liquid A is applied to the front surface of core material 1 and the liquid B is applied to the rear surfaces of surfacing materials 3, no reaction starts between the liquids A and B. By piling up both the materials, the liquids A and B start reaction immediately, resulting in exhibiting initial bonding force. By moving the core material 1 and the surfacing materials with a vertical pair of conveyor belts 13 and 13 equipped with pressing devices under the condition that the core material 1 and the surfacing materials 3 are bonded together by initial bonding force, the core material 1 and the surfacing materials 3 are pressed against each other so as to be strongly bonded together in a short period of time.

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for continuously manufacturing a wood-based flash panel in which a thin plate-like surface material is pressure-bonded to the front and back surfaces of a core material with an adhesive.

[0002]

[Prior Art and its Problems] The manufacture of flash panels is
As shown in FIG. 1, an adhesive 2 is applied to the surface of a core material 1, and a surface material 3 which has been subjected to a surface treatment is attached thereon to form a panel 5, and a plurality of panels 5, 5 are formed. The panel is completed by pressing in a stacked state for about 5 to 10 minutes using a press 6 or the like, curing in that state to cure the adhesive 2, and after decompressing, sizer finishing 7 or edge bonding (not shown). To do.

In this process, a water-based adhesive which is easy to handle, such as a vinyl acetate resin emulsion type adhesive, is used. However, since water is used as a medium, its evaporation rate and diffusion rate into wood are low. As a result, the initial adhesive strength is extremely weak and it takes a long time to cure, so the pressing time until curing also becomes long. Therefore, there is a disadvantage that the panel manufacturing becomes a batch process and the bonding process of the surface material of the panel and the finishing process such as sizer after bonding are separated.

[0004]

TECHNICAL FIELD The present invention provides a method for manufacturing a flash panel in which a thin plate-shaped surface material is pressure-bonded to the front and back surfaces of a rectangular core material with an adhesive so that the panel can be manufactured continuously. Is an issue.

[0005]

[Technical Means] The first technical means for solving this technical problem is (a) using a non-mixing type adhesive composed of two AB reactive liquids, and (b) A Liquid is applied to the surface of the core material and liquid B is applied to the back surface of the surface material to polymerize both, and (c) in that state, moving in a pair of upper and lower belt conveyor devices equipped with a press means for pressure bonding. Is. The second technical means is that instead of individually applying the AB liquid to the core material and the surface material, (d) the liquid B is applied onto the core material and then dried, and (e) After applying the liquid A on the dried liquid surface B, (f) polymerizing the surface material.

[0006]

[Operation of technical means] A (main agent) and B (primer-curing agent), which have reactivity with each other when manufacturing a panel
Since a non-mixing type adhesive consisting of two liquids is used, when liquid A is applied to the surface of the core material and liquid B is applied to the back surface of the surface material, the reaction of both liquid A and liquid B starts. There is no. Incidentally, it is customary to apply the solutions A and B by using an applicator using a coater or a brush.

When both are polymerized, the liquid A and liquid B immediately start the reaction to exert the initial adhesive force.
When the core material and the surface material are bonded to each other by the initial adhesive force, when the core material and the surface material are moved in a pair of upper and lower belt conveyor devices equipped with a pressing means, the core material and the surface material are pressurized and are in a short time. It will adhere firmly inside.

According to the second aspect of the invention, liquid B and liquid A are provided on the core material.
A method is adopted in which the liquids are sequentially applied to react the adhesive. Since the liquid B applied onto the core material is dried, the liquid B does not adhere to and cure at the applicator for the liquid A when the liquid A is applied, and the subsequent application of the liquid A may be hindered. Absent.

Since the adhesive starts to react when the solution A is applied to the dried solution B, when the surface material is polymerized on the core material after application of the solution A, the initial adhesive force between the core material and the surface material is increased. Will be glued together. After that, the pressure is applied in the same manner as in claim 1, and the core material and the surface material are firmly bonded.

As described above, since the core material and the surface material are bonded to each other by the initial adhesive force developed by the adhesive, the subsequent handling becomes easy. Then, since this is pressed in a short time to completely bond it, the panel can be continuously manufactured.

[0011]

As a result of being able to continuously manufacture the panel,
There is an advantage that flash panels can be manufactured in a line work and labor saving can be achieved by introducing an automation line. Further, in the conventional method, a press device for maintaining a pressed state until the adhesive is hardened is prepared, and in addition, in order to ensure a uniform pressure on the panel, a plurality of pressure plates of different sizes are provided. In the method of the present invention, since the same pressure conveyor can be used for panels of different sizes, the facility can be simplified and a large number of small-lot production can be produced.

[0012]

EXAMPLES In the method of the present invention, a so-called honeymoon type quick-setting adhesive can be widely used. For example, an aqueous solution of a soluble protein having an amide bond in the molecule or an aqueous solution of a synthetic polymer compound having an imide group can be used as the solution A, and an aqueous glyoxal solution can be preferably used as the solution B. This adhesive causes a curing reaction when the two liquids come into contact with each other to develop an initial adhesive force. And since these do not contain strong acid, there is no fear of degrading the wood.

In the AB liquid, the rubber latex and / or the liquid A is added to 1 part by weight as a solid content of the aqueous solution.
Alternatively, a synthetic resin emulsion or an aqueous dispersion obtained by mixing a crosslinking agent as a solid content within a range of 10 parts by weight or less can be used. Further, the cross-linking agent can be mixed with the solution B. When rubber latex or synthetic resin emulsion is mixed, the elasticity and water resistance of the cured film can be improved.

In addition to the above, as a so-called honeymoon type quick-setting adhesive, a water-soluble and / or aqueous emulsion of a polymer compound having an acetoacetyl group is used as solution A, and a hydrazine compound and a polyamine compound having two or more amino groups are used. Alternatively, an adhesive containing a polyethyleneimine compound as solution B can also be used.

The adhesive used in the present invention is 5 to 3 after the initiation of the reaction between the liquid A and the liquid B so that the initial adhesive force is exerted as soon as possible immediately after the completion of the polymerization of the core material and the surface material.
It is desirable that the initial adhesive strength can be exhibited in about 0 seconds.

As the belt conveyor device equipped with the pressing device used in the method of the present invention, for example, the device shown in FIG. 2 can be used. In this device, a conveyor belt 13 which is hung between a pair of rollers 11 and 12 and circulates in the biting direction is arranged vertically. Pressing plates 14 and 14 are arranged inside the facing surface of the belt 13, and the belt 13 runs along the outside of the plate 14.

Rollers 11 in the lower conveyor device,
12 and the plate 14 are supported by a base 15, and the rollers 11, 12 and the plate 14 in the upper conveyor device are
It is supported by the frame 16 so that it can be raised and lowered. The frame 16 is connected to a cylinder 17 of a pressing device (not shown), and the panel 5 facing between the belts 13 is
It can be pressed with a predetermined pressure.

Even if the panel 5 is pressed, the upper and lower plates 14,
Due to the presence of the surface material 14, the surface material 3 does not bend with respect to the cavity 9 formed between the core materials 1, 1. Belt 13
In order to force the slide forward on the surface of the plate 14 under pressure, it is desirable that the front surface of the plate 14 or the back surface of the belt has a small sliding resistance.

The conveyor device, as in the above embodiment,
In addition to the type in which pressure is applied from the upper stage side, simultaneous vertical pressure or lower type pressure may be used.

[Brief description of drawings]

FIG. 1 is an explanatory view of a flash panel manufacturing process.

FIG. 2 is a schematic front view of a conveyor device.

[Explanation of symbols]

1 core material, 3 surface material, 5 panel, 13 conveyor belt, 14 pressure plate, 15 base, 16
Lifting frame, 17 press cylinders

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Masao Yagasaki 5-3-5 Nishibori, Urawa City, Saitama Prefecture Konishi Co., Ltd. Urawa Institute

Claims (2)

[Claims] 1. A method of manufacturing a flash panel in which a thin plate-shaped surface material is pressure-bonded to the front and back surfaces of a rectangular core material with an adhesive, and a non-mixing type of two AB liquids having mutual reactivity is used. Liquid A is applied to the surface of the core material and liquid B is applied to the back surface of the surface material by using an adhesive to polymerize both, and in that state, it is moved in a pair of upper and lower belt conveyor devices equipped with pressing means and pressed. A method of manufacturing a flash panel to be bonded. 2. Instead of individually applying the AB solution to the core material and the surface material, the solution B is applied to the core material and then dried.
The method for producing a flash panel according to claim 1, wherein after the liquid A is applied on the dried liquid B surface, the surface material is polymerized.