JPS585201A - Method of reinforcing cut end of veneer - 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 The present invention relates to a method for reinforcing the end surface of a veneer veneer, and more particularly, to a treatment method for reinforcing the end surface of a veneer veneer with a reinforcing material and then taking out the reinforced veneer board. be.

Conventionally, veneer veneer (hereinafter simply referred to as ``Oroei'') has extremely weak binding strength between fibers, so it has often been necessary to reinforce the area near the end of the veneer. That is, for example, [Method for preventing cracks in veneer or veneer, etc. (Kokusho No. 46-1589)]
Alternatively, as disclosed in "Method for lining veneer veneer and veneer veneer"(T# Publication No. 52-102404), films, adhesives, or fibers can be used as reinforcing materials directly on the end surface of raw wood. For example, a continuous reinforcing material such as G-tape on the surface of a cut veneer may be attached. However, with the former method, when the edges of the raw wood are trimmed by scoring, the reinforcing material is removed from the veneer itself, and the veneer cannot be reinforced. If the edges of the veneer are not trimmed, the end surface of the veneer remains non-linear, which causes significant inconvenience in subsequent processing steps.

Furthermore, the method of the superior cannot be carried out unless the veneer is continuous, and the continuous reinforcing material described above is inevitably attached somewhat to the side of the end surface of the veneer. If the width of the veneer is made as narrow as possible in order to improve the yield, the reinforcing material will remain in the product plywood, causing poor adhesion and uneven thickness.

The present invention was developed in order to solve the drawbacks of the conventional method, and the basic structure of the invention is to wind up a veneer together with a continuous wire, and to unwind the veneer in the wound state. The purpose of this method is to attach reinforcing material all at once to the main mouth surface and then unwind the heavy veneer, thereby achieving extremely simple and stable reinforcement and processing of the veneer.

The present invention will be described below based on the illustrated embodiments.

A first aspect of the present invention is to wind up a veneer together with a continuous wire, attach a reinforcing material to the end surface of the wound veneer, and then layer the reinforcing material while pulling the wire. For example, as shown in FIG. 1, the veneer 1 is wound together with a continuous wire 2, and then a reinforcing material, such as various adhesives 6, is applied to the end*1a of the veneer. The adhesive 3 is applied by brushing or spraying, and after the adhesive 3 hardens, the front wiring material 2 is pulled and the reinforcing material 6 layer is separated while the veneer is rolled back.

As a technique for winding the veneer, for example,
``Veneer veneer winding device'' of Publication No. 42519, JP-A-4
8-48608, "Method and device for continuous winding of opaque board for F board", JP-A No. 49-12477, "Veneer cutting machine, device for winding plywood on winding roll, etc. The same method is used when the wire is hung and wound together with a continuous wire. However, there are no particular restrictions on the feeding direction or feeding location of the wire rod, but if the wire rod 2 is fed so that it touches the entire outer circumference of the wound ball as shown in Fig. It is convenient to be able to provide accurate guidance. The veneers wound here are, of course, not limited to continuous veneers. It also includes those arranged in
``Method and device for reeling veneer'' in Japanese Patent Publication No. 52-51809, ``Method and device for processing veneer for medium board'' in Japanese Patent Application Laid-Open No. 55-49205, and As disclosed in ``Automatic Winding Device Operated by a Board Winding Machine,'' winding is performed as a group of narrow veneers.

In addition, the process of unwinding the rolled veneer can basically be easily done by hand, but if you pull the edge of the veneer and unwind it, there is a risk of the veneer itself cracking, so help is required. It is preferable to pull the wire material. Of course, it is also possible to bring the outer belt of the winding ball into contact with it and mechanically unwind it, or to pull the wire rod with a recovery reel and rewind the entire surface by the mechanical movement S.

Next, the adhesive used as the reinforcing material will be described. Adhesive is extremely easy to use and convenient as a reinforcing material since it can be applied simply by applying it to the butt end surface. Also, for the instep, an adhesive such as polyurethane or vinyl acetate, that is, an adhesive that has some elasticity even after curing, is preferable because the adhesive layer is easily separated and does not impair the flexibility of the veneer. Furthermore, a short fibrous material made of glass fiber, synthetic fiber, etc. is added to the adhesive,
If they are attached parallel to the surface of the veneer, that is, aligned in the circumferential direction, the reinforcing effect will be further increased, and the adhesive layer will be easier to separate, making handling easier. Here, the hardening of the adhesive can be considered to be a matter of course, but if it is no longer sticky when touched with the hand, it can be considered to have hardened, and depending on the adhesive, it may be peeled off immediately after application. If you wind the wood veneer so that the end faces of the veneer are aligned as much as possible, you can also strengthen it by attaching a flexible plastic film instead of the adhesive. Examples of this will be described with a focus on adhesives for the buttocks.

In other words, when dealing with green veneer, sand containing mainly wet curing adhesive, such as "8P-100 manufactured by Dainippon Ink Co., Ltd."
Type 4” or [Sumitomo Bakelite Co., Ltd. Ura SumiTac G-6
1411 etc. are preferred. Then, apply or impregnate the end surface of the veneer with the undiluted solution or one diluted with water to an appropriate amount of (9) times or less (by weight) according to the membership fee, until the adhesive has completed gelatinization. It is desirably cured until semi-hardened or hardened. Usually, the curing time is about 1 to 10 minutes when using an undiluted solution, and about 6 to 60 minutes when diluted. Of course, it is possible to cure it for a longer time and then peel it off.

The wire 2 is preferably a thin and strong wire such as a thread made of natural fibers or synthetic fibers, or a thin metal wire, but a tape-shaped wire may also be used. In addition, from the viewpoint of dividing the reinforcing material layer, it is desirable that the wire rod 2 be placed as close to the butt surface of the veneer as possible, and parallel to the butt surface. Effective results were obtained within approximately ψ times. In addition, it is convenient to have the wire rods protrude from the edges of the veneer so that they can be easily pulled, and if the collection of the wire rods by mechanical means is considered as important, the number of wire rods should be more than one. Good.

This wire rod 2 is interposed to facilitate the unwinding of the heavy board 1, but on the other hand, it also has the effect of reliably separating the reinforcing material layer 6.1 Therefore, the wire rod 2 is placed closer to the end surface 1a This can be carried out more effectively by interposing the wire rod 2 between the wires or by pulling the wire rod 2 in an oblique direction closer to the butt end surface 1a.

As mentioned above, by reinforcing the end surface of the wood in the form of a veneer and even in the form of a rolled ball, not only will there be no inconveniences like when reinforcing the raw wood, but it will also ensure that the reinforcement material adheres evenly. When the reinforcing material is co-fogged, the required time for curing the reinforcing material can be given, making it possible to perform a stable reinforcing process as a whole. Furthermore, since the veneer is unwound while pulling the wound wire together, no undue force is applied to the veneer itself.
Even when the 4H veneer is relatively thin or soft, it can be taken out stably, doubling its effectiveness.

Next) This second invention will be explained.

The second invention is an improvement on the first invention, and the veneer winding process and reinforcing material attachment process are the same as the first invention, but the subsequent steps are different. are doing. That is, the second invention relates to the drawing and cutting of the wire rod, and involves pulling out the wire rod toward the end side of the veneer, first dividing the layer of reinforcing material, and then unwinding the veneer. It is something to do.

FIG. 2 shows an example of this, in which a reinforcing material 3 is attached to the end surface 1a4 of the veneer 1 wound together with a continuous wire 2, and the end of the wire 2 is pulled in the direction of the arrow to reinforce the reinforcement. The material layer 3 is divided and the veneer 1 is taken out.

In the present invention, the wire rod 2 is used only for dividing the layer of reinforcing material 5, and the veneer 1 is used for dividing the layer of reinforcing material 3 i #
It is your turn to be unrolled after r. Therefore, in the present invention, no restrictions are placed on the unwinding process of the veneer, and it is possible to separate the collection of the wire and the unwinding of the veneer in terms of the process. There is no problem as long as it is on the end side of the veneer and in a direction that separates the reinforcing material layer, and the method and position of the intervening wire can also be implemented in the same manner as in the first invention.

As mentioned above, the second invention is rolled together with veneer:! The reinforcing material layer was separated by pulling the wire taken out to the end side of the veneer, and the layer of reinforcing material was then unwound. Therefore, the reinforcement of the end surface of the veneer with the reinforcing material was This can be done stably and accurately, and if the target veneer is a group of small-width veneers packed together, reinforcement that also serves as bonding is more effective. Furthermore, since the division of the reinforcing material layer and the unwinding of the veneer are distinguished, the direction or means for unwinding the veneer is not limited, making handling even more convenient.

In both of the above inventions, the number of points is determined as to whether the end surface of the veneer is to be reinforced entirely or locally, only one end surface is to be reinforced, or both sides are to be reinforced. Then, consider each condition such as the material and condition of the veneer to be treated.
Approximately six selections may be made as appropriate. Also, as a matter of course, matters common to both inventions were described only in the explanation of the first invention and omitted in the second briefing session. Please make sure that it also applies.

As is clear from the foregoing, according to the present invention, the reinforcing treatment of veneers can be performed more accurately and stably than in the past, and the effects of implementing the present invention in plywood factory operations are extremely large.

[Brief explanation of drawings]

The drawings show embodiments of the present invention, and FIG. 1 is a detailed explanatory diagram of the first invention, and FIG. 2 is a detailed explanatory diagram of the second invention. 10. Veneer, 1a1. End surface of veneer, 26. Wire rod, 31
．． Reinforcement material

Claims (1)

[Scope of Claims] 1. A plywood board is wound together with a slow-knotting wire, and a reinforcing material is attached to the end surface of the rolled-up plywood board. 1. After that, while pulling the wire, the reinforcing material is A method for reinforcing the edge of a veneer board, which is characterized by unwinding the veneer veneer while dividing the layers. 2. The method for reinforcing the end of a veneer board according to claim 1, wherein the front wiring material is interposed near the end surface of the veneer veneer and parallel to the end surface. 5 Wrap veneer veneer together with continuous wire! A reinforcing material is attached to the end surface of the rolled-up veneer veneer, and then the wire is pulled out to the end side of the veneer veneer, and the layer of reinforcing material is separated by #L, and then the A method for reinforcing the end of a veneer veneer, which is characterized by unwinding the heavy veneer. 4. The method for reinforcing the end of a veneer veneer according to claim 6, wherein the 11IEII material is interposed near the end surface of the veneer substrate and parallel to the end surface.