JPS63319101A - Manufacture of veneer laminated material - 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 [Industrial Application Field] The present invention relates to a method for manufacturing a veneer laminate material that is straight and has no uneven thickness.

[Conventional technology] Conventionally, laminated veneer materials, which are made by laminating and bonding multiple raw veneers of different colors between flat plates using an adhesive, have been used as decorative materials because the laminated surface of the veneers has a striped pattern. It was being used.

[Problems to be solved by the invention] However, in order to efficiently manufacture decorative materials of the required thickness with conventional laminated veneer materials, it is necessary to produce a large number of raw material veneers at once, about 100 to 500 sheets. Because it is manufactured by laminating and press-bonding, the striped pattern of the laminated material becomes wavy due to local unevenness in thickness and hardness of the raw material veneer, and the veneer has a straight striped pattern. Laminated materials were difficult to obtain.

Therefore, the present invention provides a method for manufacturing a veneer laminate having a straight striped pattern by improving the conventional method for manufacturing a veneer laminate.

[Means for Solving the Problems] The configuration of the present invention is to create a primary laminate by press-bonding a plurality of raw material veneers between flat plates using an adhesive, and then to Next, a plurality of pieces of the laminated material are pressed and bonded together between flat plates with an adhesive at a pressure lower than that in the previous process to create a second blown layered material, and then a plurality of the second blown layered materials are bonded together using an adhesive. Manufacture of veneer laminated material by pressing and bonding the pieces together between flat plates at a pressure lower than that in the previous process to create the (n+1)th blown layered material (n-2...) Regarding the method.

Hereinafter, the present invention will be described in detail with reference to the drawings which are examples.

Fig. 1 shows a side view of the first laminated material, and Fig. 2 shows a method for manufacturing the (n+1)th blown laminated material by laminating a plurality of pieces of the nth laminated material used in this invention. The raw material veneer 1 is a commonly used rotary veneer or sliced veneer obtained from wood with no or almost inconspicuous grain pattern, and these veneers are sorted by color as they are or are processed to the desired color by bleaching, dyeing, etc. Color and sort. Note that the thickness of the raw material veneer 1 is usually about 0.5 to 2 mm.

Next, the above-mentioned raw material veneer 1 is coated with a common room-temperature curing wood adhesive for each color on the surface, stacked in a predetermined order between flat plates, and bonded by pressure to form the first laminate 2. Create.

The appropriate number of raw material veneers 1 to be laminated to create the primary laminate 2 is about 5 to 20. - If the number of laminated raw material veneers exceeds 20, it becomes difficult to obtain the desired reversibility of the laminated material. As the adhesive, when the veneer 1 is a dry veneer, a commonly used uncolored adhesive mainly made of urea resin is used, and when the veneer 1 is a wet veneer 1, a moisture-curable urethane resin-based uncolored adhesive is used.

The flat plate is a template made of iron or the like with a flat surface, and is used for the first laminated material 2.
The pressing conditions for veneer 1 to make this are 10 to 20 kg/
crrI'-3 to 12 hours is appropriate.

Next, as shown in Fig. 2, multiple pieces of the n-th laminate material 3 are pressed and bonded together between flat plates using an adhesive at a pressure lower than that in the previous step to create the (n+1)th blown laminated material. .

The adhesive used, the amount of application, and the flatness of the plate are almost the same as those used in the previous step to create the laminated material, but the pressing conditions are set to a lower pressure than in the previous step. For example, if the pressure in the previous step is 20 Kg/crrf, the n-th laminate materials 3 are bonded together using a pressure of about 16 to 14 Kg/crn', which is about 20 to 30% lower.

In addition, after grinding the surface of the n-th laminate material 3 smoothly, if the multiple pieces are pressed together between flat plates with an adhesive at a lower pressure than in the previous process, a more straight striped pattern can be created. This is preferred because a laminated material can be obtained.

Finally, it is also possible to thin or cut the laminated cross section of the laminated material in parallel to obtain a decorative veneer with a striped pattern.

[Function] In the present invention, in order to manufacture a laminated material, multiple pieces of laminated material are pressed and bonded together between flat plates with an adhesive at a pressure lower than that in the previous step. This is to keep the surface condition of the material flatter than that of the next laminated material.

[Example] Examples of this invention will be described below.

A raw material veneer with a thickness of 0.6 + ncn in which the wood grain pattern was hardly noticeable was immersed in a hydrogen peroxide solution, bleached, and then dried.

Next, the bleached veneers were dyed by immersing 500, 300, and 100 pieces in pink, gray, and black dye solutions, respectively, and then dried to obtain raw material veneers.

Next, apply approximately 100 g/rn' of an uncolored urea resin-based room temperature curing adhesive to the surfaces of the raw material veneers of the three colors mentioned above, and then apply gray to five pink veneers between the flat plates. Laminated 3 veneers and 1 black veneer in order, 15 Kg/crn
20 pieces of laminated material having a thickness of 5.4 mm were produced by pressing under the conditions of -6 hours. Next, an uncolored urea resin adhesive is applied to both surfaces of the laminated material, the laminated materials are stacked on top of each other, and the laminated materials are pressed together under the conditions of 10 Kg/crn' -5 hours to obtain a thickness of 54 mm in three colors. A laminated veneer material with a straight striped pattern was obtained.

[Effects of the Invention] Since the present invention has the above-described configuration, even if the veneer has some thickness inconsistency or hardness, the nth-order laminated material serving as the substrate can be kept flat. Therefore, finally obtained (n+1)
The second laminate has a straight stripe pattern.

[Brief explanation of the drawing]

Fig. 1 shows a side view of the primary laminated material, and Fig. 2 shows a method for manufacturing the (n+1)th laminated material by laminating a plurality of pieces of the nth laminated material. 1: Raw material veneer 22 Primary laminated material 3: Nth laminated material

Claims (1)

[Claims] 1. A primary laminate is created by bonding a plurality of raw material veneers between flat plates using an adhesive, and then the plurality of pieces of the primary laminate are bonded together. A secondary laminate is created by pressing and bonding between flat plates with an adhesive at a lower pressure than in the previous process, and then multiple pieces of the secondary laminate are bonded together between flat plates from the previous process. A method for manufacturing a veneer laminate, characterized in that the (n+1)th laminate (n=2...) is produced by pressure bonding at a low pressure. 2. After grinding the surface of the n-th laminate material smooth, the plurality of pieces are pressed and bonded together between flat plates with an adhesive at a pressure lower than that in the previous process. A method for producing a veneer laminate material as described in .