JPS6120705A - Manufacture of decorative 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〕 The present invention relates to a method for manufacturing decorative veneers.

[Background technology]

In the conventional manufacturing method for decorative veneers that artificially express wood grain patterns, multiple sheets of bleached or dyed thin veneers are laminated with an adhesive and bonded by pressure to obtain an assembled flitch. This laminated flitch was sliced to create decorative veneers.

However, the wood grain pattern expressed on the surface of the decorative veneer obtained in this way is monotonous, and it is not possible to express the richly varied wood grain pattern that can be seen in natural wood species.

[Purpose of the invention]

An object of the present invention is to provide a method for manufacturing a decorative veneer that can express a wood grain pattern that is rich in variation and has an excellent natural feel.

[Disclosure of the invention]

The method for manufacturing a decorative veneer of the present invention includes partially applying an organic solvent to one side of a material veneer, and then compressing the material veneer to cause the organic solvent-applied portion to cave in and form a recess on one side of the material veneer. The process includes a pretreatment process, an assembly process in which a plurality of veneers of the material having recesses formed on one side are stacked and pressure-bonded to obtain an assembled flitch, and a slicing process for slicing the assembled flitch.

- That is, this invention utilizes the phenomenon that when pressing a material veneer partially coated with an organic solvent, the organic solvent-applied portion caves in to form an arbitrary pattern of recesses in the material veneer. This changes the wood grain formed on the surface of the decorative veneer, creating a wood grain that more closely resembles that of natural wood species.

The material veneer used in this invention is a rotary lace or thinly sliced veneer of raw wood, either as it is or bleached or dyed as necessary.

Such a material veneer is pretreated as shown in FIGS. 1(A) to C). First, as shown in FIG. 1(A), an organic solvent is partially applied in a line on one side of the raw material veneer 1. In the same figure (A), four organic solvent application lines 2 are shown. Next, as shown in FIG. 13 (13), the adhesive 3 is uniformly applied to the entire surface of the opposite surface of the raw material veneer 1 coated with the organic solvent using a roll coater 4. After that, the same figure (C)
As shown in FIG. 2, a plurality of veneer materials 1 are stacked with release paper 5 interposed therebetween and pressed together with a flat mold 6.

As shown in FIGS. 2 and 3, the thus pretreated material ``veneer l'' is depressed at the organic solvent coated portion on one side, and a recess 7 is formed. Next, as shown in FIG. 4, the pretreated raw material veneer 1 is stacked in a concavo-convex mold 8 and bonded by pressure to form an assembled flitch 9, which is then sliced from a predetermined direction. As a result, a decorative veneer 10 as shown in FIG. 5 is obtained. This decorative veneer 10 has a wood grain pattern 11 that is rich in jagged variations and is similar to the wood grain of natural wood species, corresponding to the recesses 7 formed on one side of the pretreated decorative veneer manufacturing method. becomes.

In the above explanation, the adhesive 3 was applied to the surface opposite to the organic solvent-coated surface of the material veneer 1 and pressed.
It is also possible to press it directly without applying it.

In addition, it is preferable to use a material veneer 1 that is as flat as possible, and when using a corrugated material veneer, it is important to avoid the following: Cracks may occur.Waviness of the material veneer is generally caused by the fact that when the material veneer is dried in a warm air dryer after decoloring and dyeing, the end side dries quickly and becomes completely dry. .

Waving of a corrugated material veneer can be alleviated by applying water to the corrugated portion.

For this purpose, a correction device as shown in FIG. 6 is used.

In FIG. 6, reference numeral 12 denotes a vacuum conveyor for conveying the material veneer 1. Above the vacuum conveyor 12, a soft sponge roll 13 is placed with a certain gap A.
is located. This sponge roll 13 contains and holds water, and when compressed, discharges water.

As shown in FIG. 7, the corrugated material veneer 1 is conveyed on a vacuum conveyor 12, and during the conveyance process, the corrugated raised portion 14 of the material veneer 1 hits the sponge roll 13. Raised portion 1 by water soaked in
4 gets wet. Then, by feeding the material veneer 1, the raised portions 14 of the material veneer 1 compress the sponge roll 13 one after another to discharge water, as shown in FIG. The discharged water permeates into the raised portion 14 and softens the undulation.

``S''1 Next, the present invention will be explained in more detail with reference to Examples.

Example: An organic solvent (polypropylene carbonate (P, C)) was applied to one side of a veneer of agathis material with a thickness of 1.0 mm.
was applied in a line at a rate of 10 g/n (as shown in Figure 9). Urethane adhesive was also applied to the opposite side.Then, the material veneer was pressed at a pressure of 22 kg/aa, resulting in
A material veneer was obtained in which the organic solvent-applied portion caved in and grooves were formed. A plurality of veneers of this material were stacked and pressed together using a predetermined mold to create an assembled flitch, which was then sliced.

The obtained decorative veneer is shown in FIG.

Reference Example (Prevention of waviness in a veneer of material): The waviness of a veneer of agathis material having a thickness of 1.011 mm was alleviated using the apparatus shown in FIG. The material of the sponge roll is neorene-styrofoam. The gap between the conveyor and roll is 10fi.
The feeding speed of the material veneer was set at 3 to 9 m/min.

Under these conditions, corrugated material veneer (maximum corrugation height 15
When the waves were passed through the crane (Tsuru), the height of the ripples was reduced to a maximum of about 5 crops.

〔Effect of the invention〕

According to this invention, by partially applying an organic solvent to the material veneer and pressing it, it is possible to easily form a recess in the material veneer, and the surface of the resulting decorative veneer is full of variations. The wood grain is formed, giving it an excellent natural feel.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram showing the pretreatment process of this invention, Fig. 2 is a perspective view of a pretreated material veneer, Fig. 3 is a partial sectional view of Fig. 2, and Fig. 4 is an assembly process of this invention. FIG. 5 is a plan view of the decorative veneer, FIG. 6 is an explanatory diagram of the device for correcting the corrugation of raw veneer, FIG. 7 is a perspective view of the veneer in use, and FIG. 8 is an explanatory diagram of the slicing process. FIG. 9 is an explanatory diagram showing an organic solvent application line in an example of the present invention, and FIG. 10 is a plan view of a decorative veneer obtained in an example. 1...Material veneer, 2...Organic solvent coating line, 3.
...adhesive, 7...recess, 9...assembly flitch, 1
0... Decorative veneer Figure 1 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] A pre-treatment step of partially applying an organic solvent to one side of the material veneer, and then compressing it to cause the organic solvent coated part to cave in and form a recess on one side of the material veneer, and forming a recess on one side. A method for manufacturing a decorative veneer, comprising: a laminating step of stacking and press-bonding a plurality of the material veneers to obtain a flitch; and a slicing step of slicing the flitch.