JPS59156702A - Manufacture of aggregate 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 [Technical Field] This invention relates to a method of using laminated veneers to express the grain of natural precious wood using wood veneers.

[Background technology]

Conventionally, in the production method of making flitches by coloring and laminating and gluing low-grade wood veneers into thin (roughly cut) wood veneers, and then slicing these flitches to make laminated veneers, the conventional method was to make small-scale prototypes over and over again. The laminated veneer as a standard was derived through trial and error, and the specifications for the production process of the laminated veneer were determined. Below are the three stages of the design process to determine the specifications for the production process of the laminated veneer. I will explain it separately.

+11 Aim for the color tones found in the grain of natural wood, and quantitatively measure these tones using a spectrophotometer, etc. Then, in order to re-bleed these several tones onto the laminated veneer,
・Conduct coloring experiments using various coloring liquids on the wood veneer used for it.

A number of colored veneers obtained in experiments were mixed with several target tones.
The reproducibility is evaluated by comparing the results, and a colored veneer with high reproducibility is selected for each target color tone, and the coloring specifications are determined.

(2) Several selected types of colored veneers are laminated and bonded to form a flitch, and the flitch is sliced to produce a trial laminated veneer. This kind of trial production is repeated while paying attention to the lamination method and adhesion method.

The color tone and wood grain pattern of the finished work are evaluated, and specifications such as the type of coloring liquid, lamination method, bonding conditions, and type of adhesive are determined based on this evaluation. At this stage, small-scale prototypes of laminated veneers, for example, about 3Qcm square, are often produced.

(3) Produce a prototype with actual product dimensions based on the determined specifications for each manufacturing process, and examine the final quality of the product against the specifications for each process.

Above, we have explained the design process up to determining the specifications for the manufacturing process of laminated veneer. Nevertheless, due to the following reasons,
The laminated veneer obtained in step (2) did not receive very good reviews, and trials of laminated veneer were repeated many times. That is, the reason for this is, firstly, that the color tone when the wood veneer was colored did not necessarily match the color tone of the laminated veneer obtained in step (2). That is, in the conventional coloring method, the surface of the colored wood veneer becomes dark in color, but the inside becomes light in color, resulting in color unevenness. Second, the pattern of the resulting laminated veneer changes depending on the combination of colored veneers when laminated, but it was difficult to estimate the pattern until seeing the actual prototype laminated veneer. It will be done. Thirdly, it was impossible to evaluate the quality of the wood grain of the laminated veneer, which is expressed by combining the target color tone and wood grain pattern, until we saw the actual prototype laminated veneer board. can be raised. For the reasons mentioned above, there has been a problem in that the design process for determining the specifications for the manufacturing process of the laminated veneer takes a very long time. Furthermore, there is also the problem that the costs associated with numerous trial production experiments performed in one design process lead to an increase in the cost of the product.

[Purpose of the invention]

Therefore, an object of the present invention is to solve the problem that the process of designing a laminated veneer takes a long time, and the costs associated with numerous trial production experiments during this process lead to an increase in the cost of the product.

[Disclosure of the invention]

The inventors have made extensive studies to achieve the above objectives. As a result, using a computer graphic system, we set the target color tone and pattern of the laminated veneer,
We discovered that if we could find a method for coloring, laminating, and gluing wood veneers to create such color tones and patterns, the above problems could be resolved and good results could be obtained.
This invention was completed here.

Therefore, the present invention aims to provide a method for producing flitches by coloring and laminating wood veneers and gluing them together, and slicing the flitches to obtain laminated veneers using a computer graphics system. The gist thereof is a method for producing laminated veneer, which is characterized by setting the color tone and pattern of laminated veneer, and deriving a method for coloring, laminating, and/or gluing the wood veneer to produce such color tone and pattern. do.

That is, as shown in Fig. 1, a method of laminating colored veneer with 7 wood grain patterns and R boards using a computer graphics system, which affects the finished product of laminated veneer;
Factors such as the bonding method are input into the computer, and various combinations are extracted from them and displayed as a composite color image.Evaluate the target by looking at this image, and evaluate each factor until the best combination is obtained. By making corrections, the specifications for each process of manufacturing the laminated veneer are determined on a color screen.Hereinafter, we will explain this process in detail based on the drawings.

FIG. 2 is a simplified configuration diagram of an embodiment of a computer graphics system used in the method of manufacturing a laminated veneer according to the present invention. In the figure, 1 is a TV camera,
2 is an A/D converter 23 that converts the RGB signals emitted by the camera 1 from analog and log signals to digital signals; 4 is an image memory that stores and holds this digital signal in a form corresponding to the image; 4 is a color CRT display 5 that converts the RGB signal into a digital signal This is a D/A converter for display. D/A converter 4 converts digital signals into analog signals.

As shown in this figure, a sample of natural wood or the like having a target color tone is captured by a television camera 1 as a color ROB signal, and a target color portion of the sample is specified on the screen of a color CRT display 5. As a result, a target color tone value is obtained as a quantitative value of the RGB signal.

On the other hand, a sample of wood veneer treated with coloring solution 2, which should be considered, was photographed using a TV camera 1.
The color tone displayed on the color CRT display 5 is compared with the target value. That is, the target color tones of natural wood recorded in the image memory 3 are called up on the screen of the color CRT display 5, and the portions corresponding to each of the various target color tones are displayed as the color tone data of the colored sample to be considered. (RGB signals) and evaluate it on the screen of the color CRT display 5.

In this way, the most preferable sample is selected and the coloring specifications are determined. Such operations are performed for each of several color tones. The above corresponds to stage (1) of the conventional design process.

Incidentally, the wood grain pattern is generally determined by the method of adhesion of the wood veneer and the mold. This is because the wood grain pattern is expressed by the adhesive interface of the wood veneer. Of course, if you refer to conventional prototype samples, you know what kind of wood grain pattern can be obtained depending on the method of adhesion of the wood veneer and the mold, so you can check the method of adhesion of the wood veneer, the mold and the wood grain The correspondence relationship with the pattern is sketched out in the computer 6, inputted and stored in memory. The wood grain pattern is a color CRT from an existing prototype sample.
It is obtained in advance by extracting a portion corresponding to the adhesive boundary surface from the image on the display 5. Similarly, the grain shape of natural wood is also recorded and held in the image memory 3 as data.

Further, regarding the new wood grain shape, the computer 6 can determine the cross-sectional shape of the mold from the data. According to the method of the present invention, using these data, it is possible to examine a desirable wood grain pattern and design a mold using CAD/CAM. This makes it possible to realize new product designs that have never existed before. Once the bonding method and mold are determined in this way, the computer 6 is instructed to do so.

Then, several color tones extracted from each of the previously obtained coloring specifications are projected with the television camera 1, and are displayed on the screen of the color CR, T display 5 based on the determined correspondence of the wood grain pattern. Compositely display as a wood grain pattern. Composition can be performed by leaving the image memory for the wood grain pattern portion and writing the previously obtained color tone data into other memory portions. Note that various combinations of color tones may occur on the finished wood grain depending on the lamination method, and the resulting image often differs. By controlling this, we can synthesize and clarify the image of the target laminated veneer.

The image of the laminated veneer thus synthesized and displayed as a color image is evaluated and studied, and specifications for each process of manufacturing the laminated veneer are determined. The above corresponds to stage (2) of the conventional design process.

Then, based on the determined specifications, a prototype with the actual product dimensions is manufactured, and the design process is completed by making final checks on the specifications of each process.

By performing manufacturing based on the design of each manufacturing process obtained in this way, the target laminated veneer can be obtained.

〔Effect of the invention〕

As described above, the method for manufacturing a laminated veneer according to the present invention involves coloring wood veneers, laminating and bonding them to form a flitch, and slicing the flitch to obtain a laminated veneer using a computer graphics system. The method is characterized by setting the target color tone and pattern of the constructed veneer, and deriving the coloring method, lamination method, and/or adhesive method of the wood veneer that will produce such color tone and pattern. Since the cost of raw materials and man-hours required for trial production experiments in the design process can be saved, it is possible to significantly reduce cost I and shorten the period. Also, when we come up with new wood grain patterns, etc., not only natural ones but also creative ones,
The cross-sectional shape data of the mold is obtained by computer, and C
It is easy to create corresponding molds using AD/CAM, and it is also easy to design and manufacture products that have never existed before.

[Brief explanation of the drawing]

FIG. 1 is a drawing for explaining how to use a computer graphics system used in the method of manufacturing a laminated veneer according to the present invention, and FIG. 2 is a drawing showing the configuration of the computer graphics system. Agent Patent Attorney Takehiko Matsumoto

Claims (1)

[Claims] (1) In the method of creating a flitch by coloring and laminating wood veneers and gluing them together, and slicing this flitch to obtain a laminated veneer, a computer graphics system is used to set the target color tone and pattern of the laminated veneer. A method for manufacturing a laminated veneer, characterized by deriving a coloring method, a laminating method, and/or an adhesion method for the wooden placing board that produces such a color tone and pattern.