JPS59140006A - 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 belongs to the field of manufacturing technology for laminated veneers.

[Background technology] Laminated veneers are manufactured by laminating raw veneers with an adhesive interposed, sandwiching them between molds with uneven curved surfaces and pressing them together to obtain flitches, and then slicing this. Was. In the case of ε, various measures have been taken in the past in order to express the wood grain of natural trees as faithfully as possible. For example, they devised ways to color the raw material veneer, and performed preliminary processing on the raw material veneer to improve fidelity.

However, it cannot be said that a rational manufacturing method has been established to faithfully represent natural wood patterns such as those found in wood species such as cedar. .

For example, in the past, the above-mentioned cases were manufactured through the steps shown in FIGS. 1 to 3. In other words, using a flat plate like the one shown in Fig. 1, first, the material veneer is preliminarily pressed. The purpose of this pre-pressing is primarily to prevent impregnation of the colored adhesive into the material veneer, and to adjust the impregnation of the colored adhesive here. In Figure 1, 1 is a flat plate, 2 is release paper, 3 is adhesive,
4 is the material veneer. Here, as the material veneer 4, a veneer that has been appropriately bleached and humidity-controlled is used as required. Apply adhesive on the material veneer 4 (on one side) and apply release paper 2 on top of it.
Repeat this to build up the base + A car board. Then, the adhesive is pressed with the flat plate 1 to penetrate into the surface layer and harden. When this operation is completed, the release paper 2 is peeled off, colored adhesive is applied, and the flitch 6 is created by sandwiching and pressing between mold plates 5 (FIG. 2) having an uneven curved surface in a conventional manner. Then, the desired laminated veneer 7 is obtained by slicing.

In the laminated veneer 7 obtained above, the material veneer 4 is the spring material, and 8 is the part where the adhesive penetrated and hardened during pre-pressing. Colored adhesive does not penetrate. The colored adhesive penetrates into the part 9 and becomes a hardened part, making the interface between the two clear.

However, in the above process, the pressing process is carried out twice, and there is a problem that it cannot necessarily be said to be a rational method for expressing a relatively simple wood grain.

[Purpose of the Invention] The present invention has been made in order to eliminate the above-mentioned conventional drawbacks, and provides a method for manufacturing laminated veneer that easily and accurately expresses clear wood grain without requiring an extra pressing process. The purpose is to provide.

DISCLOSURE OF THE INVENTION] The present invention is based on a method for manufacturing laminated veneers in which raw veneers are laminated with an adhesive interposed, sandwiched between templates and pressed to obtain flitches, and then sliced. A colored adhesive containing a pigment with a high specific gravity is applied to one side of the raw material veneer,
The objective was to be achieved by stacking them with this side facing up.

An explanation will be given below based on drawings shown as examples.

FIG. 4 is a schematic diagram showing how the raw material veneer 4 is built up according to the present invention. Here, 10 represents a layer of colored adhesive, and 11 represents a layer of normal adhesive. The colored adhesive 10 is mixed with a pigment having a higher specific gravity than the adhesive used as the haze, and the color is adjusted to a predetermined color. Therefore, the adhesive layer 10 is layered with the coated side facing up, and the pigment sinks downward during the flitching process, or even if not, the layer 11 of the normal adhesive layer is placed on top. Since there is no pigment migration, the wood grain is clearly expressed. Further, a regular adhesive 11 is applied to the other surface of the raw material veneer 4, but since this permeates into the other surface of the raw material veneer 4, the portion where this has permeated is impregnated with the colored adhesive 10. does not occur. The ordinary adhesive mentioned here is one that does not contain a coloring agent, or is colored only to a lighter level than the colored adhesive 10 described above. Therefore, this normal adhesive 11 and colored adhesive 1
The impregnated portion of 0 can clearly express color divisions on the front and back sides of a single raw material veneer 4.

The above build-up is clamped between mold plates with uneven curved surfaces (not limited to mold plates with uneven curved surfaces) using a conventional method, and flitches are obtained and sliced to obtain the desired assembly. A veneer 12 is obtained. In this laminated veneer 12, the spring wood 4a part, the part 13 impregnated with the colored adhesive 10, and the part 14 impregnated with the ordinary adhesive are clearly separated, thereby improving the clarity of the wood grain. There is. If this manufacturing method is adopted, flitches can be created in one step, eliminating the need for the conventional process of pressing with a flat plate, and eliminating the need to use release paper, resulting in streamlining. can be achieved.

Note that the gist of the invention described above can be applied to other methods of manufacturing laminated veneers, thereby achieving rationalization of laminated veneers, and thus will be disclosed below for reference.

In other words, it can be applied to reduce the number of steps required to express a wood grain (for example, cedar) in which the color of the summer wood is clear and the border is jagged. The situation in such a case will be explained with reference to FIGS. 6 to 8 shown for explaining the situation. First, a bleached and dyed raw material veneer 17 is prepared. A colored paper 16 coated with adhesive is placed on one side of this. This is to express the summer wood part. Further, a release paper 15 is placed on top of it. These units are pressed into a predetermined layer using a flat plate mold. This is represented in Figure 6. Once the clamping is finished,
Before releasing the pressure and peeling off the release paper 15, irregularities for expressing jaggedness are imparted to the surface of the veneer from above the colored paper 16, and then the release paper 15 is peeled off. This is shown in FIG.

Next, an adhesive is applied to one side of the veneer prepared in this way, and then the veneer is sandwiched between molds having an uneven curved surface to form a flitch according to a conventional method.

In the above process, first, the surface of the raw material veneer to be used is embossed to create a jagged appearance. Then apply adhesive to both sides of this veneer. This eliminates the need for paper patterns that are layered with colored paper sandwiched between them and has an uneven curved surface, and furthermore, an extra pressing process can be omitted.

[Effects of the Invention] The present invention provides a method for producing laminated veneers in which raw material veneers are laminated with an adhesive interposed, and the raw material veneers are clamped between molds to obtain flitches and then sliced. A colored adhesive containing a pigment with a high specific gravity is applied to one side of the board, and a regular adhesive is applied to the other side, and the plates are laminated with the colored adhesive coated side facing up, and then placed on a mold plate. Since it is characterized by pinching and clamping, the following effects can be obtained.

■The process of pre-pressing is no longer necessary, and release paper is also no longer necessary, making it possible to streamline the manufacturing process. And manufacturing costs are reduced.

■Clear wood grain can be expressed faithfully.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram of the preliminary pressing process as a conventional example, Fig. 2 is a schematic diagram of the pressing process for making flitches, Fig. 3 is a perspective view of a laminated veneer, and Fig. 4 is a build according to the present invention. 5 is a perspective view of a laminated veneer obtained by the present invention, FIG. 6 is a schematic diagram of the preliminary pressing process as a reference example, and FIG.
The figure is a schematic diagram showing the process of imparting unevenness, and FIG. 8 is a schematic diagram showing a laminated veneer. 1 is a flat mold plate 2 is a release paper 3 is an adhesive 4 is a register raw material veneer 5 is a mold plate 6 having an uneven curved surface is a flitch 7 is a laminated veneer 10 is a colored adhesive layer 11 is a normal adhesive layer 12 13 is a laminated veneer 13 is a colored adhesive permeation part 14 is a normal adhesive permeation part 15 is a release paper 16 is a colored paper 17 is a raw material veneer 18 is an unevenness for expressing jaggedness Patent applicant Matsushita Electric Works Co., Ltd.

Claims (1)

[Claims] (1) The raw material veneers are laminated with adhesive interposed, and the flitch is formed by sandwiching them between molds with uneven curved surfaces and pressing them together.
4. In the method of manufacturing laminated veneer by slicing this, a colored adhesive containing a pigment with a large specific gravity is applied to one side of the raw veneer, and a normal adhesive is applied to the other side, and the colored adhesive is applied to one side of the raw veneer. A method for producing laminated veneers, which is characterized by laminating them with the adhesive-applied side facing up, and then clamping them between molds.