RU2319608C1 - Method for production of adhered laminated material - Google Patents

Abstract

FIELD: production of adhered laminated materials of veneer.

SUBSTANCE: the method consists in preparation of veneer, cutting of veneer into strips of a definite width, application of adhesive onto the veneer strips, forming of a block in which the strips are positioned in the longitudinal direction in parallel with one another, pressing of the block in a press, cutting of the obtained material into blanks of the required dimensions. At a block forming the veneer strip layers are oriented perpendicularly to the plane of the layer of the produced adhered laminated material. The pressing pressure is applied perpendicularly to the layers of the veneer strips and in parallel with the layer plane of the produced adhered laminated material.

EFFECT: enhanced quality of the product and reduced raw waste lumber.

2 dwg

Description

The invention relates to the woodworking industry, in particular to the production of glued laminated veneer materials.

A known method of manufacturing a glued laminated wood material (block-veneer board) (Kulikov VA, Chubov AB Technology of glued materials and plates. M .: Forest industry, 1984. S. 310-311), including the preparation veneer, gluing veneer into a block in a press for hot pressing, cutting the glued block into slats, which are rotated 90 ° and glued into a block-veneer board.

However, the disadvantage of this method is the large amount of waste, because with hot bonding of plywood boards, the compression is 19%, in addition, cutting the block into slats leads to a loss of wood into sawdust within 10%.

There is also a method of manufacturing a glued laminated wood material (Bubnov V. Structural Composite Lumber - what is it? // Wood. RU, 2004. May-June. S.74-75), including the preparation of veneers, cutting veneers into strips of a certain width, applying glue to the veneer strips, forming a carpet in which the strips are arranged in the longitudinal direction parallel to each other, pressing the carpet in a continuous press, cutting the resulting material into blanks of the required width. However, this method limits the ability to obtain blanks of various size groups, since cutting is allowed only in width. This is due to the fact that the specificity of carpet pressing contributes to an uneven distribution of density and strength over the thickness of the glued material. Cutting the material in thickness can lead to warpage of the resulting workpieces and a decrease in their strength characteristics.

The disadvantage of this method is the increased amount of waste in the form of sawdust and scraps formed during the filing of the edges.

The technical problem to which the invention is directed is to expand the assortment of blanks for cross-section and reduce wood waste.

This problem is solved by the fact that in the method of manufacturing glued laminated material from veneer, including the preparation of veneers, cutting veneers into strips of a certain width, applying glue to strips of veneer, forming a block in which the strips are arranged in the longitudinal direction parallel to each other, pressing the block in the press , cutting the obtained material into workpieces of the required size, according to the invention, when forming a block of plastic, the veneer strips are oriented perpendicular to the plane of the plastic of the glued laminate terial, and the pressing pressure during gluing is applied perpendicular to the layers of veneer strips and parallel to the plane of the sheet of the produced glued laminated material.

The proposed set of features provides the object (method) with new properties: orientation of the veneer strip layers perpendicular to the plane of the produced laminated laminate material during block formation contributes to an even distribution of density and strength over the thickness of the glued material.

In addition, the proposed orientation of the sheets of veneer strips perpendicular to the plane of the sheet produced glued laminated material provides the ability to cut the material in thickness without causing warpage of the resulting workpieces and reduce their strength characteristics.

The application of pressing pressure during gluing perpendicular to the layers of veneer strips and parallel to the plane of the sheet of the produced glued laminated material can significantly reduce the amount of waste in the form of sawdust and scrap, since the operation of sawing edges is excluded from the technological process.

The invention is illustrated by drawings. Figure 1 shows the glued laminated veneer material, where it is shown that the faces of the veneer strips 1 are oriented perpendicularly to the plane of the face 2 of the glued laminated wood material 3 produced; figure 2 shows that the pressing pressure 4 when gluing is applied perpendicular to the layers of strips of veneer 1 and parallel to the plane of the plate 2 of the produced glued laminated wood material 3, regardless of the direction of application of pressure (a - horizontally, b - vertically).

The method is as follows.

Dried cut sheets of veneer, veneer flaw and lump veneer are sorted by length.

Veneer strips are made, for example, on NG-30 guillotine shears with a width of 20-100 mm. Further, the veneer strips are glued along the length to a predetermined size, for example, using a US cross-cutting machine and a USPG narrow-plate press. Then, glue is applied to the surface of the veneer strips and a block for gluing is formed, orienting the surface of the veneer strips perpendicular to the plane of the surface of the glued laminate being produced. The formed block is loaded into a pressing device, for example, a screw press, and glued laminated veneer material is glued by applying a pressing pressure perpendicular to the veneer strip layers and parallel to the plane of the laminated laminate material produced. Further, if necessary, the obtained glued laminated veneer material is cut in length, width and thickness according to known traditional technologies for cutting lumber into workpieces.

Made according to the claimed method, the glued laminated veneer material has a structure similar to the structure of radial lumber, and has the least formability, since annual veneer layers are located almost perpendicular to the layer of glued laminated material.

In addition, the orientation of the sheets of veneer strips perpendicular to the plane of the sheet produced glued laminated material provides him with higher strength characteristics.

Using the proposed method allows to reduce the amount of waste in the form of sawdust and scraps, since the operation of sawing edges is excluded from the process.

The claimed method is also relevant in that the cost of radial lumber is high, and their production is accompanied by a large consumption of raw materials.

Claims (1)

A method of manufacturing a glued laminated material from veneer, including the preparation of veneers, cutting veneers into strips of a certain width, applying glue to strips of veneer, forming a block in which the strips are arranged in the longitudinal direction parallel to each other, pressing the block in a press, cutting the resulting material into blanks required sizes, characterized in that when forming a block of plastic, the veneer strips are oriented perpendicular to the plane of the plastic of the produced glued laminated material, and the pressing pressure at pouring is applied perpendicular to the layers of veneer strips and parallel to the plane of the sheet of the produced glued laminated material.

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