JPH0245565B2 - BENYATANBAN * NARABINISONOSEIZOHOHO - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a veneer veneer and a method for manufacturing the same.

Conventional veneer veneers and their manufacturing methods involve reinforcing the veneer by pasting a tape such as wet adhesive paper tape in a direction almost perpendicular to the fibers of the veneer veneer (hereinafter referred to as veneer) obtained from raw wood. The process of attaching tape to multiple veneers in a direction almost perpendicular to the fibers to join the veneers (and partially reinforcing them) is carried out. While the obtained veneer has achieved the original purpose of reinforcement and bonding well, the tape used has a strength that meets the above-mentioned main purpose, and due to the difference in material, its elasticity is poor. Because it is significantly different from the veneer itself,
This method has the disadvantage that the following inconveniences occur in the subsequent steps.

That is, for example, if a veneer reinforced with tape is subjected to a tendering treatment that imparts flexibility by forming many small cracks in approximately the same direction as the fibers, the veneer itself will be sufficiently softened in the direction orthogonal to the fibers. However, tape does not have the same or higher extensibility, and therefore, for example, the tape is broken along each small crack or cracks.
As a result, it has been difficult to achieve the necessary and sufficient reinforcing and bonding effects. On the other hand, if the tape does not break, there will be a difference in elongation between the tape-applied portion and the non-applied portion, resulting in the problem of cracks occurring in the veneer.

In view of the above-mentioned conventional drawbacks, an object of the present invention is to
The outline is that when the adhesive surface is in an adhesive state, a highly stretchable tape with special cuts that will not significantly impair its original reinforcing and bonding effects even if the tape breaks is applied. The object of the present invention is to provide a veneer consisting of a veneer and a method for manufacturing the same, thereby suppressing the occurrence of inconveniences in the subsequent process.

To achieve the above object, the veneer of the present invention has a tape attached to the veneer having a large number of cuts extending in a direction transverse to the fibers of the veneer at predetermined intervals in the longitudinal direction of the tape, and It is characterized by being adhesive to the veneer.

Further, in the manufacturing method of the present invention, a continuous long tape of an appropriate width is adhered to a veneer in a direction substantially perpendicular to the fibers, and then a single piece of tape is attached to the attached tape. It is characterized by forming a large number of cuts extending in a direction across the fibers of the plate at predetermined intervals in the longitudinal direction of the tape.

Furthermore, in another manufacturing method of the present invention, a large number of continuous long incisions having an appropriate width and extending in a direction transverse to the fibers of the veneer are formed at predetermined intervals in the longitudinal direction of the tape. It is characterized by being adhesively attached in a direction almost perpendicular to the fibers of the board.

Hereinafter, the present invention will be described in further detail according to an example of implementation illustrated in the drawings.

For example, as shown in FIGS. 1 and 2, the veneer according to the first aspect of the present invention is a wet adhesive that is delivered from a tape reel 4 to the end portion 1a of the veneer 1 being conveyed in the direction of the arrow in the figure. The tape 2, which has been made sticky by applying water using a suitable water application device (not shown), is applied to the adhesive surface of the adhesive paper tape or the like, and the pressure roll 5 is applied in a direction substantially perpendicular to the fibers of the veneer 1. After adhering the tape in a continuous manner through the veneer, a cut roll 6 having a cutting edge 7 is used to make cuts 3 across the fibers of the veneer 1 in the tape 2 so that some cut residue 3a remains on one side. Obtained by a manufacturing method (second invention of the present invention) in which a large number of them are formed. In addition, if the veneer 1 is a raw veneer, the appropriate water application device described above is not required.
When the tape 2 is attached to the green veneer by the pressure roll 5, the adhesive surface of the tape 2 can be made sticky due to the moisture of the green veneer.

For example, veneer 1 obtained by the above manufacturing method
Since the break position of the tape 2 is regulated by the notch 3 and the adhesive surface is adhesive, even if the tape 2 breaks, the original reinforcing effect will not be significantly impaired, and the next There is no risk of any inconvenience occurring during the process.

Next, for example, if the veneer 1 shown in FIG. 2 is subjected to a tendering process to form a large number of small cracks in substantially the same direction as the fibers and then stretched, a tensile force also acts on the tape 2. During the elongation, the uncut portion 3a of the tape 2 is broken as the veneer 1 is elongated, and is divided into a plurality of tape pieces 2a, as shown in FIG.
However, since the adhesive surface of each tape piece 2a is adhesive and the cut is made so as to cross the fibers of the veneer, it can be displaced in the direction of elongation due to the tendering process with respect to the veneer, resulting in the small cracks. It will not break due to copying.

Moreover, as mentioned above, each small piece of tape 2
Since a is pasted across the small crack, its adhesion is maintained across the small crack to each of the fibers before and after perpendicular to the small crack. While allowing the plate 1 to elongate, the reinforcing effect of the tape 2 is prevented from being impaired. Furthermore, the veneer does not crack due to the difference in elongation between the part to which the tape 2 is attached and the part to which the tape 2 is not attached.

On the other hand, even if the veneer 1 shown in FIG. 2 shrinks by subjecting it to a drying process, for example, the tapes 2 having the notches 3 will overlap each other at the notches 3. They tend to be more flexible and allow for more shrinkage than traditional uniform tapes. As a result, fraying of the veneer due to the difference in shrinkage between the tape-applied portion and the non-applied portion is suppressed. At that time, as shown in FIG. 6, even if some of the uncut portions 3a cannot resist the shrinkage force and break, the shape of the divided tape pieces 2a will not be the same as that of the veneer.
Since the shape crosses the fibers, there is no risk that the original reinforcing effect will be significantly impaired.

Note that the aspect of the cut 3 in the manufacturing method is as follows:
This is not limited to the example shown in Figure 2, and for example, the direction may be changed as appropriate to the direction B, C, or D shown in the example shown in Figure 3 or 4 instead of the direction A in the example shown in Figure 2. For example, as shown on the left side of FIG. 3, there is no problem with providing uncut portions 3a on both sides of the tape 2, or as necessary, as shown on the right side of FIG. 3 and FIG. 4, for example. There is no problem even if the tape 2 is formed without any uncut portions so that the tape 2 can be expanded and contracted even more easily.

Further, the veneer having the above structure can be prepared by applying the veneer to the tape 2 drawn out from the tape reel 4 in advance using a cutting roll 6 having a cutting blade 7 and a receiving roll 8, as shown in FIG. 7, for example. A manufacturing process in which a large number of cuts 3 are formed across the fibers of the veneer 1, and then the tape 2 is attached so that the adhesive surface of the tape 2, which has the cuts 3 in a direction substantially perpendicular to the fibers of the veneer 1 that is conveyed in the direction of the arrow in the figure, becomes sticky. It can also be obtained by the method (third invention of the present invention).

Note that the formation of cuts in the tape in this manufacturing method is not limited to immediately before adhesion as in the above embodiments, and although not shown in the drawings, for example, even when forming the tape into a tape reel, the key point is There is no problem as long as notches are formed in the tape in advance before attachment. Further, the direction of the cuts may be varied within the range of crossing the fibers of the veneer, but it is necessary to provide at least some uncut portions so as not to make it impossible to lead out and attach the tape.

Further, the effectiveness of the present invention is not limited to the tape-reinforced veneer and the manufacturing method thereof as in the embodiments of the inventions described above, but also to the anvil roll 10 and cutting method as shown in FIGS. 8 and 9. Bonding is performed using a tape 2 that can be manufactured by using a known bonding device having a blade 11, a delivery conveyor 12, a shaft 13, etc., and, if necessary, also using other bonding members made of adhesive or the like for the bonded portion 9. The resulting veneer 1 and its manufacturing method are also effective in the same way as described above.

As is clear from the above, according to the present invention, it is possible to suppress the occurrence of inconveniences that were conventionally caused in the subsequent process, so it is effective.
The effects of implementing the present invention in a plywood factory are extremely large.

[Brief explanation of drawings]

FIG. 1 is a side view showing an example of an apparatus for carrying out the manufacturing method according to the second aspect of the present invention, and FIGS.
4 and 8 are schematic plan views showing the veneer according to the first aspect of the present invention, and FIG. 5 is a schematic plan view showing the veneer shown in FIG. 2 in an expanded state. FIG. 6 is a schematic plan view showing the shrunken state of the veneer in FIG. 2;
FIG. 7 is a side view showing an example of a device for implementing the manufacturing method according to the third aspect of the present invention, FIG. 8 is a schematic plan view showing a bonded veneer, and FIG. 9 is a side view of the bonding device. be. In the figure, 1 is a veneer, 2 is a tape, 2a is a small piece of tape, 3 is a cut, 3a is an uncut part, 4 is a tape reel, 5 is a pressure roll, 6 is a cut roll, 7 is a cutting blade, 8 is a receiving roll , 9 is a joint, 10 is an anvil roll, 11 is a cutting blade, 12 is a delivery conveyor, and 13 is a shaft.

Claims (1)

[Scope of Claims] 1. In a veneer veneer in which a continuous long tape of an appropriate width is attached in a direction substantially perpendicular to the fibers, the tape attached to the veneer veneer is A veneer veneer having a plurality of cuts extending in a direction transverse to the fibers of the veneer at predetermined intervals in the longitudinal direction of the tape, and being adhesive to the veneer veneer. 2 A continuous long tape of an appropriate width is adhered to the veneer veneer in a direction almost perpendicular to the fibers, and then the fibers of the veneer veneer are traversed by the pasted tape. A method for producing a veneer veneer, comprising forming a large number of directional cuts at predetermined intervals in the longitudinal direction of the tape. 3. A tape having a plurality of continuous long cuts of an appropriate width and extending in a direction transverse to the fibers of the veneer veneer is formed at predetermined intervals in the longitudinal direction of the tape, and the tape is cut almost orthogonally to the fibers of the veneer veneer. A method for producing a veneer veneer, characterized in that the veneer is adhered in an adhesive state in the direction of the veneer.