JPS5922703A - Manufacture of aggregate 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 (a) Technical Field The present invention belongs to the technical field of manufacturing decorative veneers by flitching raw veneers by applying veneer assembly technology and slicing the flitches.

(b) Conventional technology In the production of so-called laminated veneers, raw veneers are cut out from logs using rotary lace, etc., which are bleached and pre-dyed as necessary, and then laminated with an adhesive interposed. This is done by clamping the material between molds having an uneven surface, forming a flitch, and then slicing this.

The above-mentioned basic manufacturing method has been put into practical use with various additions to make it more similar to natural precious wood. For example, the following method has been implemented to express the three-dimensional concentrated conduit part unique to the wavy ring-hole shrine using the above-mentioned assembly technique.

■ First, the raw material Φ plates that have gone through the processes of degreasing, bleaching, and dyeing are assembled together with an adhesive interposed, and a J7Z plate-shaped laminated lumber (
(hereinafter referred to as primary flitch).

(2) Slice the primary flitch to obtain a primary sliced veneer.

■ Next, apply adhesive to the primary sliced veneer and the regular veneer that has been dyed in the 11 colors you want to express.
Clamp it onto a mold plate with an uneven surface and press it to obtain a flitch (
(Hereinafter, this will be referred to as a secondary flitch).

(2) When the secondary flitch is sliced again, a built-up decorative veneer having a conduit portion is obtained.

However, even though the above method does not represent the conduit part in the canopy, it is done using adhesive and a middle plate, and has the disadvantage of lacking a three-dimensional effect. It also had the disadvantage that the agent did not enter and the wiping effect was not effective.

Therefore, a method was devised in which a foam layer is formed between the veneers during the primary flitch formation. However, when a foaming adhesive is applied to a veneer and the veneer is laminated and foamed, the low molding pressure, together with the drawback that poor adhesion occurs when slicing the primary flitch.

Furthermore, there is a method of inserting foam between veneers and laminating and adhering them, but it is difficult to manufacture thin foam sheets, and when laminating veneers and foam sort, it is difficult to make thin foam sheets. The adhesive entered the holes and blocked them, resulting in a disadvantage that wiping could not be performed during the wiping process.

(c) Purpose of the Invention This invention focuses on further improving the method for manufacturing the laminated veneer described above, and aims to faithfully represent the conduit part during three-dimensional construction, which is unique to wavy ring holes, as it is in nature. .

(d) Disclosure of the Invention This invention applies a urethane adhesive to a raw material veneer, foams and hardens it, then applies an adhesive to the opposite side (non-foamed side), and then laminates and presses it. The method is characterized in that a primary flitch is obtained, and thereafter a primary sliced veneer and a secondary flitch are sequentially applied to form a laminated decorative veneer.Hereinafter, an explanation will be given with reference to the drawings shown as examples.

First, a urethane adhesive is applied to a dyed veneer 2 (FIG. 1) that has been dyed to a desired color and humidity controlled, and then foamed. The foaming conditions are not limited in any way, and conditions may be selected so that a desired foamed layer can be obtained. For example, to express an oak conduit, the amount of urethane adhesive applied is 100 g.
/rr+ coating and foaming at room temperature is preferred. In addition, the thickness of the foam layer and the size of the bubbles are designed to match the tree species being expressed.

Next, an adhesive is applied to the non-foamed surface of the veneer 2 having the foamed layer 1, and the veneer 2 is laminated and pressed using a flat plate mold to form a primary flitch (FIG. 2). Further, it is sliced to a desired thickness to obtain a primary sliced veneer 3 (FIG. 3).

Primary slice veneer 3 and pl adjusted and prepared for non-perforation
' + ta 4 is laminated with -U intervening urethane adhesive, and is pressed with a mold plate having an uneven surface to obtain a secondary flitch 5 (FIG. 4). This is then sliced to produce the finished product, the laminated decorative veneer 6 (Fig. 5).

In the present invention, the reason why the adhesive is applied to the raw material veneer and foamed in advance is that the adhesive partially penetrates into the veneer during foaming and curing to form a strong adhesive layer. It's for a reason. Furthermore, since the adhesive is applied on the side opposite to the foam layer, the primary flitch has good adhesive strength.

(e) Example [Part 1] A rotary veneer made of South Sea broad-leaved Labra wood with rotary lace to a thickness of 0.6 mm was washed in hot water for 1 hour, and then dyed to the color tone of natural oak wood using the following dye formulation.

(Dye combination) A289 (Sumitomo Chemical +41) 0.12±0.2% P M yel low (Sumitomo Chemical RIIJ) 0
．． 15±0.5 tmt% The dyeing conditions were: dyeing time 3 hours, temperature 95-±2°C, and bath ratio 35.

The moisture content of this veneer was adjusted to 45±5%, and then a laminated veneer was manufactured as follows.

First, a urethane foaming agent was applied to the above veneer at a rate of 100 g/m' and foamed and cured. Next, 80g/d of urethane adhesive was applied to the opposite side of the veneer having the foam layer, laminated, and pressed together using a flat plate press at a pressure of 5 kg/m.
A first-order flitch was obtained. Next, slice this into 0.31 thick pieces and use a saw to obtain the first slice.

These primary sliced veneers and dyed veneers were layered alternately with the same adhesive (applied amount: 80 g/rJ), and pressed using a mold with an uneven surface at a pressure of 10 kg/rrr. A secondary flitch was obtained, which was then sliced into 0.61-thick pieces to obtain a laminated decorative veneer.

The above laminated decorative veneer had a good three-dimensional concentrated conduit portion, and when subjected to wiping treatment, the pigment entered into the pores of the foam layer, resulting in a laminated decorative veneer with a three-dimensional effect.

[Part 2: Comparative Example] Using the raw material veneer obtained by dyeing and humidity control in Example 1 above, a urethane foam with a thickness of 0 or 2 times previously prepared and the veneer were bonded with a urethane adhesive. 1.
After obtaining the next flitch, the second flitch was obtained in the same manner as in Example 1, and the veneer obtained by slicing was subjected to a wiping process, but the adhesive penetrated into the pores of the foam layer, resulting in the wiping process. No effect of treatment was observed.

(f) Effect This invention applies a urethane adhesive to one side of a raw material veneer, cures it by foaming, and then applies the adhesive to the opposite side, and then presses the adhesive to form the primary flitch. and slicing this to obtain a primary sliced veneer, and then laminating the previously prepared non-porous veneer and the primary sliced veneer alternately with an adhesive interposed, The feature is that the secondary flitch is obtained by clamping and pressing on a mold plate with an uneven surface, and then it is sliced, so the expression of the three-dimensional concentrated conduit part observed in the corrugated annular hole material is natural. It is possible to express it more faithfully by

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of a veneer with a foam layer, Fig. 2 is a cross-sectional view of a primary flitch, and Fig. 3 is a perspective view of a primary sliced veneer.
FIG. 4 is a sectional view of the secondary flitch, and FIG. 5 is a perspective view of the decorative veneer assembly. 1 is a foam layer 2 is a dyed veneer 3 is a primary sliced veneer 4 is a non-porous veneer 5 is a secondary flitch 6 is a laminated decorative veneer Patent applicant Matsushita Electric Works Co., Ltd.

Claims (1)

[Claims] (1) In the manufacturing method of laminated decorative veneer using veneer lamination technology, urethane adhesive is applied to one side of the raw veneer, foamed and cured, and then adhesive is further applied to the opposite side. , laminated and pressed to create the first and second slices, and then sliced and sliced them to obtain the first sliced veneer, and then the pre-prepared non-perforated veneers f, l'! The plates and the first sliced veneer are laminated alternately and with an adhesive interposed, and are sandwiched between molds having an uneven surface and pressed together to obtain a secondary flitch,
The method for producing laminated decorative veneer is characterized by slicing this.