JPS59222327A - Manufacture of board - Google Patents

Abstract

PURPOSE:To obtain a straight grained veneer material and flitch suitable for slicing in order to obtain a wooden veneer with a grain pattern by a method wherein the directions of fibers of material fibers are put in order and made solidly stick together. CONSTITUTION:Several kinds of wooden materials are decomposed into fibers of 5-10mm. length. Dried wooden fibers 4 are put on an inclined flat plate vibrator 5 and, after directions of the fibers are put in order by applying vibration, dropped on a flat plate inclined slope 6 and again dropped onto a sticking forming plane 7 while the directions of the fibers are kept arranged. An adhesive 9 is spouted out and sprayed from a nozzle 8 over the surface of the arranged fibers. This procedure is repeated so that the wooden fibers 4 are formed into a veneer. After a lamination press, a relearing paper 11 is removed. A plurality of such veneers 10' are laminated together and formed into a flitch in a bent shape. The flitch is sliced to obtain an artificial wooden veneer.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a method for manufacturing plate materials used as housing members and construction materials.

[Background technology]

Traditionally, the colors and patterns of sawn and laminate boards made from natural wood do not match, so we created decorative boards with uniform colors and patterns by bleaching and dyeing veneers sliced from sawn lumber, then laminating and slicing them. and carpenters making precious wood. However, the wood veneer itself may be of a different species, or the wood may be the same species but the logs are different, or the wood may be sliced at different locations even though the wood is the same, and the wood may have defects such as tarnish or discoloration. As a result, variations among the veneers during subsequent bleaching, dyeing, and drying became extremely large.

And this also had an effect on the decorative panel, which had a strange finish. Also, it took a lot of time to bleach or dye the veneer. Veneers that have been uniformly bleached and dyed to the inside deteriorate in quality, so holes were likely to occur on veneers sliced from 7-rich pieces.

[Purpose of the invention]

Therefore, this invention takes less time for bleaching and dyeing, has less variation in bleaching and dyeing soil, has a high yield even when using various types of wood and wood pieces, and can produce sliced veneers of artificial precious wood. The purpose is to provide a manufacturing method for plate materials that can be obtained.

[Disclosure of the invention]

The inventor has made extensive studies to achieve the above objectives.

As a result, we found that if the defibrated material is bonded and integrated with the fiber directions aligned to form a veneer or flitch, the above drawbacks can be overcome and good results can be obtained. Completed the invention.

Therefore, the method for manufacturing a board material according to the present invention includes the step of defibrating wood and at least aligning the fiber directions of the material fibers and bonding them together when making a plate material using the defibrated wood fibers as material fibers. It is characterized by This invention will be explained in detail below.

The wood material to be used can be used regardless of its species, size, location, presence or absence of cracks, holes, etc. These wood materials are pulverized, defibrated, and the raw material fibers are tossed. In this case, the raw material fiber refers to a strip with a length of several to several tens of meters and a thickness of one to several tens of meters. Depending on the case, chemical fibers, carbon fibers, animal fibers, etc. may be included in the material fibers. Defibration is the first
As shown in the perspective view of the figure, a peeling machine is designed to insert a wood material 3 in the axial direction between two rods 1a and lbO each having a spiral blade 2 formed around the shaft. This is done by using a device. That is, the rod 1a
, lb make the blades 2, 2 spiral in opposite directions, and fibrillate the wood material 3 while rotating in the same direction.

However, other methods may be used. When defibrating, it is preferable to make the fiber length as long as possible, both from the viewpoint of strength and the appearance of the wood grain pattern.

Next, the various types of raw material fibers are bleached and dyed either separately or all together.

Decolorization is similar to bulb bleaching, using H2O2 + chlorine.

You can use bleach such as hypochlorite. The bleaching method and the dyeing method are carried out, for example, by immersing the material fiber in a tank containing a bleaching solution or a dyeing solution. However, the method is not limited to this method.

After dyeing, the material fibers are exposed to a heater or the like and dried. There are no particular restrictions on the drying method either.

The dried raw material fibers are bonded and molded into a veneer shape with an adhesive while keeping the fiber direction constant. In this case, the raw material fibers with the fiber direction aligned are sent onto the bonding surface by vibration from a machine, and then the adhesive is sprayed there using a nozzle, or the adhesive and the material fibers are fed from the same tube onto the bonding surface. will be carried out. However, the method is not limited to these methods.

Press the adhesively molded veneer in this way
and dry to make a material veneer.

The resulting material veneers are then laminated to form flitches, which are then sliced to obtain decorative veneers.

In addition to the method described above, a method for obtaining decorative veneers is to prepare dyed fibers of different colors and fibers with different thicknesses, and to dye them in the same direction with Kf and fiber direction. There is also a method of integrating the flitches and slicing the flitches to obtain decorative veneers.

In addition to these methods of obtaining decorative veneers, there is also a method of obtaining plywood at once by using raw material fibers and making the fiber directions perpendicular to each other in each layer.

Note that if chemical fibers or carbon fibers are mixed into the material fibers, the bending strength and fiber strength can be increased.

Furthermore, the strength of the board material can be adjusted by changing the proportion of these fibers mixed.

Next, an example of the method for manufacturing a plate material according to the present invention will be shown.

[Example 1] Various wood materials were defibrated into fibers with a length of 5 to 10 m, which were immersed in a decoloring tank to be decolored, then immersed in a dyeing tank to be dyed, and dried with a heater.

As shown in FIG. 2, the dried wood fibers 4 are placed on the soil of a tilted flat plate-shaped vibrating machine 5 and vibrated to align the direction of the fibers. It was dropped. The wood fibers 4 were carried along the north of the inclined plate 6 and dropped onto the adhesive molding surface 7 with the fiber directions aligned. Then, the adhesive 9 was sprayed and sprayed from the nozzle 8 onto the surface. This operation was repeated to form the wood fiber 4 into a veneer shape, and adhesive molding was performed in this state. Molded body 1 configured in a single plate shape
As shown in FIG.
1 was peeled off to form a veneer (not shown). Subsequently, a large number of such veneers 10' were laminated and assembled, flitch-formed into a curved shape as shown in FIG. 4, and the flitches were sliced to make veneers of artificial precious wood.

[Example 2] Various wood materials were defibrated, and the wood fibers were immersed in a decolorizing tank to be decolorized, then immersed in a dyeing tank to be dyed, and dried with a heater. As shown in FIG. 5, the dried wood fibers 4 were passed through a sieve 12 having elongated openings to align the fiber direction. Next, as shown in FIG. 6, the wood fibers 4 are placed in the adhesive tank 13 containing the adhesive 9 together with the carbon fibers 16, and the side fibers 4 and 16 are placed in the adhesive tank 13, extending from the bottom of the adhesive tank 13. An inclined plate 1 whose cross section extends from the tube 14 which is elongated in the width direction.
5 onto the adhesive molding surface 7 with the fiber direction aligned, to produce a veneer-shaped molded product (not shown). Subsequently, as shown in FIG. 7, the fibers 4 and 16 were fed out from the adhesive tank 13 so that the fiber directions were perpendicular to each other on the molded body 10a, thereby producing a single plate-shaped molded body 10b. Furthermore, in the same manner, a veneer-shaped molded body (not shown) was made on the molded body 10b so that the fiber direction was orthogonal to the molded body 10b. The three-layer molded body thus laminated was bonded between each layer to form a plywood-like molded body. As shown in Figure @8, several sheets of such a plywood-like molded body 17 were stacked with a release paper 11 sandwiched between them, and pressed using a press machine 12. The release paper was removed from the plywood-like molded body and it was dried to become reinforced plywood.

〔Effect of the invention〕

As described above, the method for manufacturing board materials according to the present invention bleaches or dyes the defibrated wood material, so it does not take much time to bleach or dye, compared to bleaching or dyeing a veneer. Variations in the degree of bleaching and staining are reduced. Therefore, the yield is greatly improved. In addition, by aligning the fiber directions of the material fibers and bonding them together, it is possible to obtain straight-grained veneers and flitches that are suitable for slicing, and it is also possible to obtain precious wood veneers with wood grain patterns. It brings about an effect.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of the defibration step in the method for manufacturing a plate according to the present invention, and FIGS. 2 to 4 are drawings illustrating the steps in an embodiment of the method for manufacturing a plate according to the present invention. , and FIGS. 5 to 8 are drawings illustrating steps in another embodiment of the method for manufacturing a plate according to the present invention. 4...Wood fiber 5...Vibration imparting machine 10...Single board shaped molded body 12...Sieve 16...Carbon fiber 17...Plywood shaped body agent Patent attorney Takeshi Matsumoto HikoFigure 1Figure 3Figure 4Figure 5

Claims (6)

[Claims] (1) A method for manufacturing a board material, which includes the step of defibrating wood and at least aligning the fiber directions of the material fibers and bonding them together when making a board material using at least the defibrated wood fibers as material fibers. (2) Claim 1 in which the material fibers also include artificial fibers
The manufacturing method of the plate material described in Section 1. (3) Claim 1 in which the material fiber also includes animal fiber
Item 2 is the manufacturing method of the plate material described in Item 2. (4) The method for manufacturing a plate material according to any one of claims 1 to 3, which comprises bonding and integrating raw material fibers into a veneer and flitch-forming the veneer. (5) The method for manufacturing a plate material according to any one of claims 1 to 3, characterized in that the material fibers are integrated into a 7-rich shape and the flitch is a feature of the flitch. (6) The method for manufacturing a plate material according to any one of claims 1 to 5, wherein aligning the fiber directions of the material fibers is performed by applying mechanical vibration in one direction to the material fibers.