RU2310556C1 - Method for production of radial lumbers - Google Patents

Abstract

FIELD: woodworking industry, in particular, production of lumbers.

SUBSTANCE: the method consists in classifying of lumbers according to the diameters, disbarking, forming of the lumber section to a hexagon, sawing of the hexagon into two parts of a tetragonal section, classifying and piling of the parts, drying, treatment of the tetragonal-section parts at the lateral edges, cementing together by the parts to a block and sawing of the block to lumbers. At sawing-out of a hexagonal-section blank from a lumber the planes of two apposite saw cuts are oriented in parallel with the log axis, the rest four saw cuts are oriented in parallel with the log taper, after that the hexagon a sawed into two similar parts, the plane of the saw cut is oriented in the log axis and in parallel with the planes of the two first saw cuts. Then, after drying the lateral edges of the parts are milled in the taper, after that the milled parts are cemented together by the inclined surfaces of the edges, the cemented parts are laid in a block, changing by turns the crown and butt ends.

EFFECT: enhanced yield of radial lumbers, reduced labour content.

1 dwg

Description

The invention relates to the woodworking industry, in particular to the production of lumber.

A known method of manufacturing radial lumber (P.P. Aksenov and others. "Lumber technology", Moscow, 1976, S. 32-33), including sawing a log into sectors with further sawing sectors into radial lumber. The disadvantage of this method is the large amount of wood waste and the complexity of the process.

There is also a method of manufacturing radial lumber (A.M. Kopeikin "Prospects for the development of sawmilling technology", Moscow, 1989, p. 32-35), including sorting logs by diameter and debarking, sawing logs into sectors, cutting off the runoff zone, gluing sectors and sawing the obtained two-edged beam into lumber. However, this method limits the possibility of obtaining lumber of various size groups, since the dimensions in the section of the lumber depend on the size of the sector. At the same time, obtaining sectors of the same cross-section from a log with a large number of them is technologically very difficult due to the inevitable production of sub-standard sectors, which reduces the yield of sawn timber. In addition, the implementation of this method is impossible without first performing the operation of cylinder logs. The disadvantage of this method is the increased amount of waste in the form of sawdust with a large number of cuts in the log.

The technical problem to which the invention is directed is to expand the range of lumber for cross-section and waste reduction, as well as labor costs by reducing the number of cuts in the log and changing the technological operations of processing the log before gluing.

This problem is solved by the fact that in the method of manufacturing radial lumber, including sorting logs by diameter, debarking, forming a section of a log into a hexagon, sawing a hexagon into two parts of a quadrangular section, sorting and stacking parts into a stack, drying, processing parts of a part of a quadrangular section along the side edges, gluing parts into a block and sawing a block into lumber, according to the invention, when sawing from a log a workpiece of a hexagonal cross section of a plane of two counter-cutters The cuts are oriented parallel to the axis of the log, the remaining four cuts are oriented parallel to the run of the log, after which the hexagon is sawn into two identical parts, while the plane of the cut is oriented along the axis of the log and parallel to the planes of the first two cuts, after drying, the side edges of the parts are milled along the run, after which the milled parts are glued together by the inclined surfaces of the edges, while the parts to be glued are laid in a block, alternately changing the vertex and butt end.

The proposed set of features provides the object (method) with new properties: the use of a runaway zone before sawing logs into lumber, cutting logs with two parallel planes of the hexagonal beam allows you to pre-form the technological base, providing the possibility of increasing the accuracy of processing when cutting the hexagon into equal parts.

In addition, the orientation of the cuts on the run allows you to increase the output of radial lumber.

Sawing the resulting hexagonal beam into two parts can significantly reduce labor costs and ensure accurate formation of the sizes of these parts.

The orientation of the parts of the quadrangular section in the block to be glued, alternately changing the vertex and butt end, allows for further sawing of the block to produce radial sawn timber of various sections with a maximum output.

The invention is illustrated in the drawing.

The drawing shows a diagram of the technological process of manufacturing radial lumber.

Technology (method) includes: delivery and sorting of logs according to diameters 1; ham 2; sawing from a log of a workpiece of a hexagonal section 3; sawing the hexagon into two identical parts 4; drying the obtained blanks 5; milling surfaces of the side edges of the parts along the run for gluing 6; gluing parts into block 7, during the formation of which the location of the vertex and butt ends is alternately changed; sawing block 8 into radial lumber 9.

The method is as follows.

After sorting and debarking using the well-known technology, the log goes, for example, to the table of the Wood-Mizer single-saw band saw, where six cuts are performed in turn, two of which are parallel to the axis of the log, and the next four are made along the run from the top diameter of the log to the butt to obtain a hexagonal timber, turning the log on the cart 60 ° before the next cut. The resulting hexagonal beam is positioned and fixed on the table so that the longitudinal axis of the beam is parallel to the saw blade of the machine, and then the saw is cut into two equal parts.

The billets of a quadrangular cross section obtained from the timber are stacked and sent to the dryer. Then, alternately, the side edges of each workpiece are milled on an F-4 machine. Then, glue, for example polyurethane, is applied to the milled edges and placed in a block, alternately changing the location of the vertex and butt ends. The formed block is glued, for example, in a screw press, providing pressure and rigid fixation of the workpieces in the horizontal plane and pressure in the vertical plane. After gluing and blocking the block for the time required for the selected adhesive, the block is sawn into lumber, for example, on the same single-saw band saw Wood-Mizer.

Using the proposed method allows to reduce the number of cuts when cutting logs, radial lumber, significantly simplify the process and ensure the accuracy of the formation of identical cross-sectional sectors, expand the specification of sizes of cross-sections of lumber, and also increase the yield of radial lumber due to the complete elimination of the appearance of non-standard sectors and reduce the amount of sawdust.

The claimed method is also relevant in that the cost of radial lumber exceeds the cost of tangential lumber, for example, in the Japanese market, twice.

Claims (1)

A method of manufacturing radial lumber, including sorting logs by diameter, debarking, forming a section of a log into a hexagon, sawing a hexagon into two parts of a quadrangular section, sorting and stacking parts into a stack, drying, processing parts of a quadrangular section along the side edges, gluing the parts into a block and sawing block on lumber, characterized in that when sawing from a log a workpiece of a hexagonal cross section, the planes of two opposite cuts are oriented parallel to the axis logs, the remaining four cuts are oriented parallel to the run of the logs, after which the hexagon is sawn into two identical parts, while the plane of the cut is oriented along the axis of the log and parallel to the planes of the first two cuts, then after drying the side edges of the parts are milled along the run, after which the milled parts are glued together with inclined edge surfaces, while the parts to be glued are laid in a block, alternately changing the vertex and butt end.

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