JPH05138608A - Production of veneer laminated wood - Google Patents

Abstract

PURPOSE:To coat not only the surface of a veneer but also the end part of the cut end with an adhesive and to obtain a veneer laminated wood having stable strength by bringing the cut end part of the tip in the insertion side of a veneer into contact with a coating roll and thereafter inserting the veneer between the coating roll and a feed roll. CONSTITUTION:A spreader is constituted of a coating roll 1, a doctor roll 2, a feed roll 3 and a driver unshown in a figure. Veneer carrier devices constituted of belts 5 are provided in the insertion side and the delivery side of a veneer 4. In this case, when the veneer 4 is inserted into the spreader, the cut end part of the tip of the insertion side of the veneer 4 is brought into contact with the coating roll 1 and the veneer 4 is inserted between the coating roll 1 and the feed roll 3. Therefor the insertion velocity of the veneer 4 is made speedier than the feed velocity of the veneer on the feed roll 3. Further an insertion angle of the veneer 4 for the coating roll 1 is regulated so that this veneer 4 is firstly brought into contact with the coating roll 1. Thereby not only the surface of the veneer 4 but also the end part of the cut end are coated with an adhesive 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION This invention relates to a single plate laminated material (LVL).
And LVB).

[0002]

2. Description of the Related Art Conventionally, single plate laminated materials (LVL and LVB)
Is an adhesive applied to the surface of a thick veneer having a thickness of about 1 to 5 mm and sequentially laminated until a predetermined thickness is reached. In the length direction, the end faces of the veneers are simply butted together. It was a composition.

[0003]

However, such a conventional single plate laminated material has no particular problem when used as a core material for various building materials, but is used as a structural material in a portion requiring strength. In such a case, the edges of the veneer were not adhered, and therefore the strength was somewhat uneasy.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has a structure in which an adhesive is applied to a plurality of veneers so that the veneers can be applied in a thickness direction and a length direction. Also, in the method for manufacturing a veneer laminated material in which the edges are sequentially contacted and then thermocompression bonded, when inserting into the spreader to apply the adhesive to the veneer, the tip of the veneer on the insertion side of the veneer roll This is a method for producing a veneer laminated material in which a wood mouth portion is brought into contact and then inserted between a coating roll and a feeding roll.

[0005]

According to the first aspect of the present invention, when the veneer is inserted into the spreader for applying the adhesive to the veneer, the veneer end on the insertion side of the veneer is brought into contact with the applicator roll and then the applicator roll. The reason why the adhesive is inserted between the feed rolls is that the adhesive is attached not only to the surface of the veneer but also to the edge of the wood mouth when passing through the spreader. Claim 2
In paragraph (3) or (3), the speed at which the veneer is inserted into the spreader feed roll is higher than the speed at which the veneer is fed, and the angle at which the veneer is inserted into the coating roll is adjusted by applying the veneer end of the veneer to the coating. This is an embodiment for passing between the coating roll and the feed roll after coming into contact with the roll.

Hereinafter, the present invention will be described in detail based on embodiments. FIG. 1 is an enlarged oblique side view of an embodiment of a veneer laminated material manufactured by the method of the present invention, and FIG. 2 shows a process of applying an adhesive by a spreader.

The spreader used in the present invention is a conventional device composed of a coating roll 1, a doctor roll 2, a feed roll 3, and a driving device (not shown) such as a motor. Then, a veneer carrying device is provided on the side where the veneer 4 is inserted and the side where the veneer 4 is sent out. That is, the single plate 4
The conveying device on the side of inserting the is a device for feeding the single plates 4 one by one between the spreader rolls, and a large number of rolls or belts 5 that rotate so as to sandwich the single plate 4 from both sides and a motor that drives them. And a device such as a transmission (not shown).

The veneer 4 used in the present invention has a thickness of 1-5.
It is a thick one with a thickness of about mm, is made by a scraping machine such as a rotary racer or a slicer, and is a normal one that is dried to a water content of about 15%. As the veneers 4, those having the same width in which the fiber directions are aligned in the longitudinal direction are usually used.
Then, the veneers 4 are deposited with their fiber directions aligned, and the adhesive 6 is applied to the surface or both sides of the veneers one by one using a spreader roll.

The adhesive 6 to be applied is an adhesive composed of a usual urea resin, melamine resin, phenol resin or the like, and the application amount is about 10 to ²⁰ g / m ² .

When the veneer 4 is inserted into the spreader roll, the insertion side edge of the veneer 4 once contacts the spreader coating roll 1 and then passes between the coating roll 1 and the feed roll 3. Therefore, as the method, the insertion speed of the veneer 4 may be set a little faster than the veneer feed speed of the feed roll 3 of the spreader roll, or the veneer 4 may first come into contact with the coating roll 1 by a single The insertion angle of the plate 4 with respect to the spreader coating roll 1 is adjusted.

For example, when the spreader feed roll 3 is rotated at a peripheral speed of 60 m / min, the insertion speed of the single plate 4 is 63 to 66 m which is 5 to 10% faster than the peripheral speed of the feed roll 3. / Min.

When adjusting the insertion angle of the single plate 4 with respect to the spreader coating roll 1, with respect to the virtual straight line formed by the rotation axis of the coating roll 1 and the rotation axis of the feed roll 3,
Normally, it is inserted at an angle of 90 degrees, but in the case of the present invention, as shown in FIG. 2, an angle of about 95 to 100 degrees is attached to an imaginary straight line and the insertion side end of the veneer 4 is inserted in the arrow direction. Is first brought into contact with the coating roll 1 and then adjusted so as to be inserted between the coating roll 1 and the feed roll 3.

As a result, the adhesive 6 is applied to the surface of the veneer 4 and the end of the veneer on the insertion side. When laminated to a thickness, a veneer laminated body is obtained in which the adhesive 6 is applied not only to the front and back surfaces of the veneer 4 but also to the ends of the wood openings. afterwards,
The single plate laminates are thermocompression bonded to obtain the desired single plate laminate material as shown in FIG.

[0014]

[Example] When a urea veneer / melamine resin adhesive was applied at 15 g / m ² to a dried veneer of a cedar having a thickness of 3 mm, a width of 65 cm and an irregular length by a spreader, the veneer feed rate of the feed roll was changed. The speed was set to 55 m / min, and the feeding speed of the veneer inserting device consisting of a pair of belts that were fed so as to sandwich the veneer from both sides was set to 60 m / min. Then, the above-mentioned veneer was sequentially inserted from the insertion direction of the spreader, the adhesive was applied while passing between the coating roll and the feed roll, and the adhesive was applied to the surface of the veneer and the tip end opening.
Subsequently, these veneers were successively deposited so that the edges of the wood mouths were in contact with each other to obtain a continuous laminate having a thickness of 30 mm. Next, these laminates were cold-pressed and then cut into a length of 4 m.
Then, these laminated bodies were hot-press bonded using a hot press to obtain a desired veneer laminated material.

As described above, according to the present invention, the adhesive can be applied not only to the surface of the veneer but also to the end of the mouth of the veneer, without substantially changing the manufacturing process of the conventional veneer laminated material.
It is possible to obtain a laminated material that is stable in strength as compared with the conventional single plate laminated material.

[Brief description of drawings]

FIG. 1 is an enlarged side view of a single plate laminated material according to an embodiment of the present invention.

FIG. 2 shows a process of applying an adhesive by a spreader according to an embodiment of the present invention.

[Explanation of symbols]

 1 Coating roll 2 Doctor roll 3 Feed roll 4 Single plate 5 Conveyor belt 6 Adhesive

Claims (3)

[Claims] 1. A method for producing a laminated veneer material, which comprises applying an adhesive agent to a plurality of veneers, laminating the veneers in the thickness direction and the length direction so that the end portions of the veneers are successively in contact with each other, and then thermocompression bonding. In the case of inserting into a spreader for applying adhesive to a veneer, the veneer is characterized in that after the veneer part of the insertion side of the veneer is brought into contact with the applying roll, the veneer is inserted between the applying roll and the feeding roll. A method for manufacturing a laminated plate material. 2. The veneer insertion speed is set higher than the veneer feed speed of the feed roll of the spreader when the veneer is inserted into the spreader to apply the adhesive to the veneer. Manufacturing method of laminated veneer lumber. 3. When inserting into a spreader for applying an adhesive to a veneer, the veneer is inserted at an angle at which the tip of the insertion side of the veneer comes into contact with the spreading roll of the spreader. 1. The method for producing a single plate laminated material according to 1.