JPH0417762B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a slicing frit used in manufacturing artificial decorative veneers.

[Background Art] As one method for manufacturing artificially decorated veneers, raw wood veneers 10 obtained by rotary slicing or the like are laminated with an adhesive in a bent state as shown in FIG. There is a method in which an artificial decorative veneer A is obtained by creating a fritsch 1 and slicing this fritsch 1. The problem with this device has been that the frit 1 is connected to the cutting edge 12 as shown in Fig. 1.
When slicing is performed using the cutting blade 12, the fritsch 1 is made of wood and has a brittle surface.
2 enters the fritch 1 again, the artificial decorative veneer A sliced by the cutting blade 12 will be damaged. And especially sliced artificial decorative veneer A
Since it is very thin, cracks are likely to occur due to the above-mentioned occurrence.

[Object of the Invention] The present invention has been made in view of the above points, and it is an object of the present invention to provide a slicing flitch that can perform slicing with a cutting blade without fear of causing damage to the ends of the flitch. This is the purpose.

[Disclosure of the Invention] The slicing frit according to the present invention has the following features:
A resin layer 2 is provided over the entire surface of the side end surface of the fritch 1, and the resin layer 2 is composed of a resin 2a having a fast curing speed on the side of the fritch 1 and a resin 2b having a slow curing speed on the opposite side. The present invention will be described in detail below with reference to Examples.

A resin layer 2 is provided over the entire surface of the end face of the fritch 1 on the side where the cutting blade 12 cuts through, and as will be described in detail later, this resin layer 2 has a resin 2a on the side of the fritch 1 which has a fast curing speed, and a resin 2a on the opposite side. It is formed into two layers with resin 2b which has a slow curing speed. And in this case, when slicing, the cutting blade 12
The breakage occurs on the end face where the frit cuts through because cutting stress is concentrated on the end face by the cutting blade 12. However, when the resin layer 2 is provided on the end face of the frit 1 in this way, the second As shown in the figure, the stress caused by the cutting blade 12 during slicing is absorbed by the resin layer 2, thereby making it possible to prevent defects from occurring during slicing. By slicing in this way, the artificial decorative veneer A with the resin layer 2 at the end as shown in FIG.
is obtained, but this resin layer 2 may be removed as appropriate.

By the way, urethane resin (especially soft or semi-hard) is mainly used as the resin forming the resin layer 2, but if a resin with a slow curing speed is used, this resin will react with the moisture in the fritsch 1, causing foaming. As a result, the adhesion strength of the resin layer 2 to the fritches 1 decreases, and the effect of providing the resin layer 2 cannot be obtained sufficiently. Conversely, if a resin with a fast curing speed is used, the adhesive strength of the resin layer 2 to the fritches 1 can be improved, but a large amount of resin is required to apply the resin to the side end surfaces of the fritches 1 to a predetermined thickness. This makes it extremely difficult to handle such a large amount of resin, since the time from the start of stirring the resin to the end of coating it on the fritches 1 cannot be taken for a long time. Therefore, in the present invention, a measure as shown in FIG. 4 is adopted. That is, first, a thin layer of resin 2a having a fast curing speed is applied to the entire side end surface of the fritch 1 and cured.
Since this resin 2a has a fast curing speed, foaming due to the influence of moisture in the fritches 1 can be avoided as much as possible. In addition, since the amount of application is small, the process from stirring to application can be carried out quickly and in a short period of time. As this resin 2a, for example, manufactured by Urethane Giken Co., Ltd.
The pot life is 10~ when using a mixture of TA-011 (main material) and TB-080 (curing agent) at a weight ratio of 1:1.
15 minutes of urethane resin can be used, 1mm
Just apply it to a certain thickness. Then, a thick layer of resin 2b having a slow curing speed is applied thereon and cured.
Moisture in the flitch 1 does not act on this resin 2b due to the blocking effect of the resin 2a, and foaming can be prevented from occurring in the resin 2b.
Because of its slow curing speed, there is no problem even if it is applied in large quantities because it can take a long time from stirring to application. As this resin 2b, for example, TA-011 (base resin) manufactured by Urethane Giken Co., Ltd.
A urethane resin having a pot life of 30 to 40 minutes can be used by mixing it with TB-035 (curing agent) at a weight ratio of 1:1, and the resin should be applied to a thickness of about 4 to 5 mm. In this way, the resin layer 2 made of two resin layers 2a and 2b can be formed with a thickness of about 5 mm on the side end face of the fritch 1 over a wide area of about 4 m in length and 50 cm in width, for example.

[Effects of the Invention] As described above, according to the present invention, the resin layer is provided over the entire side end face of the fritch, so when the fritch is sliced with a cutting blade, the cutting blade cuts this side end face portion. The resin layer can absorb the stress generated when cutting through the frits, and the frits can be sliced without any damage. In addition, the resin layer is composed of a resin with a fast curing speed on the fritch side and a resin with a slow curing speed on the opposite side.
By forming a layer, a resin with a fast curing speed is applied to the fritch side, so it is possible to avoid foaming due to the influence of moisture on the fritch, and even if the amount of fast curing resin applied is small. The process from stirring to coating can be done quickly in a short period of time, and since a resin with a slow curing speed is applied on top of a resin with a fast curing speed, the water in the frits will not act due to the blocking effect of the resin with a fast curing speed. It is possible to prevent foaming in slow-curing resins, and it is possible to apply large quantities of slow-curing resins without problems because it takes a long time to coat them, thus making the resin layer stronger. Moreover, it can be provided thickly and can reliably prevent chipping when slicing.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a conventional example, FIG. 2 is a perspective view of an embodiment of the present invention, FIG. 3 is a plan view of a decorative wooden veneer obtained by the above method, and FIG. 4 is a perspective view of a resin layer of the same method. FIG. 3 is a perspective view showing the structure. 11 is a flitch, 2 is a resin layer, 2a is a resin with a fast curing speed, and 2b is a resin with a slow curing speed.

Claims (1)

[Claims] 1. A resin layer is provided over the entire surface of the side end face of the fritch, and the resin layer is formed into two layers: a resin with a fast curing speed on the fritch side and a resin with a slow curing speed on the opposite side. Fritsch for slicing, which is characterized by: