JPS5843243B2 - Side-splitting veneer veneer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to an improved cross-seam veneer veneer.

Conventional cross-spliced veneer veneers have the drawbacks of a high rate of overlapping during the gluing process, especially in the vicinity of today, high joining costs, and problems in the gluing field.

The present invention was developed to solve these conventional drawbacks, and the details thereof are as follows.

In the veneer veneer of the present invention, as illustrated in FIG. The veneer surface is continuously adhered to the veneer surface in two locations using thermoplastic adhesive in a direction transverse to the veneer veneer fibers and the bonding edges, and both of the veneer veneer bonding edges have at least the fibrous material. The portion where the yarn 4 is attached is closely attached to the vicinity of substantially two portions, and an appropriate amount of thermoplastic adhesive 5 is applied between the bonding surfaces of the portion, as illustrated in FIGS. 1 and 2, for example. As shown in FIG. 1, each small width veneer veneer is located near the ends of both sides of the fibrous threads 4 and the adhesive 5, and the portions near the end portions of the veneers are substantially separated from the 2 parts to which the fibrous threads 4 and the adhesive 5 are attached or interposed. Some gap 6 is formed between the joining edges.

The gap 6 is set to a size that does not cause any problem in the plywood product, and a suitable amount is, for example, 0.2 vts to 4M.

Further, the narrow-width veneer veneer constituting the veneer veneer of the present invention is processed by manual cutting, such as by cutting with a knife or by deforming the veneer veneer itself, so that a gap can be created between each joining edge.

Normally, veneer veneers exhibit a wavy phenomenon at the end of the wood, which is especially noticeable in thin veneers.When these veneers are joined and pressed together to form plywood, the wavy parts extend in a direction perpendicular to the fibers. , as illustrated in FIG. 3, core-shaped sag a occurred near the end of the butt, but in the veneer veneer of the present invention, substantially 2 of each narrow veneer veneer to which the fibrous threads were attached Because a gap is formed between each narrow veneer veneer near the ends of both sides of the veneer, the elongation of the veneer veneer due to moisture in the glue field is absorbed by the gap, which causes the waving phenomenon described above. The risk of overlapping is significantly reduced, and the fibrous threads on the surface of the veneer veneer and the adhesive between the bonding surfaces make the two parts in close contact and are intensively bonded. It has high strength and requires significantly less joining material overall, reducing costs.

Furthermore, the combination of the fibrous yarn and the adhesive increases the bonding strength in a rational and synergistic manner, and therefore the tensile resistance of the fibrous yarn can be low. The board is easy to disassemble, and countermeasures can be easily taken when defects in the shape of the material and poor gluing of the veneer veneer are discovered at the gluing site.

In addition, wood materials including veneer veneers are constantly subject to shape changes due to moisture in the air, and the cross-splitting veneer veneers of the present invention absorb shape changes through the gaps formed between the joining edges near the ends of both ends. Moreover, since the joint is essentially two-positioned, even if cracks occur, there is no risk of stress being applied to the joint, and this can be avoided over time.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a side-splitting veneer veneer according to the present invention, and FIG. 2 is a partial sectional view of FIG. 1. FIG. 3 is an explanatory diagram of a conventional horizontally spliced veneer. 1 to 3...Plywood veneer, 4...Fibrous thread, 5...Thermoplastic adhesive, 6...
gap.

Claims (1)

[Claims] 1 A plurality of veneer veneers are connected to the fibers in a substantially perpendicular direction, and one or more fibrous threads are attached to the surface of the veneer veneer at substantially two locations with a thermoplastic adhesive. The veneer veneer is pasted in a direction transverse to the fibers and the joint edge, and both joint edges are closely adhered at least at substantially two portions to which the fibrous yarn is pasted, and the fibrous yarn An appropriate amount of thermoplastic adhesive is interposed between the joint surfaces of the part to which the fibrous yarn and the adhesive are pasted, and the end wood on both sides is lower than the substantially two parts to which the fibrous yarn and the adhesive are pasted or interposed. A side-splitting veneer veneer characterized by the fact that some gaps are formed between the edges of the veneer veneer joints near the opening.