RU2361728C1 - Method of cutting logs for obtaining laminated timber - Google Patents

Abstract

FIELD: woodworking industry.

SUBSTANCE: method comprises sawing up logs into beam and segments with subsequent cutting segments. Before cutting, segments are dried, chipped along the face and bonded with faces combined into blocks which are cut into tangential-sawn and mixed-sawn timber using canting and quartering method.

EFFECT: increasing volume output of sawn goods and reducing efforts.

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Description

The invention is intended for use in the sawmill and woodworking industry.

A known method of producing glued blanks for radial sawing (Author's certificate No. 490651, M.Kl., В27В 1/100, publ. 05.11.75, Bull. No. 41), the essence of which is that the log is cut into narrow sectors that are dried , planed and glued by combining radial surfaces, and the near-core part of one sector is combined with the peripheral part of another, and their butt parts with vertex ones.

A known method of producing glued lumber (Author's certificate No. 891436, M. Cl. ³ , B27B 1/100, publ. 12/23/81, Bull. No. 47), the essence of which is that the sawn logs after cylindrical cutting into the correct six and octagonal prisms, which are transformed by longitudinal cutting into one irregular pentagonal and two triangular prisms, one irregular hexagonal and four triangular prisms, respectively. Then, after drying and planing, the prisms are glued, combining planed surfaces in a special way, into square and rectangular sections, respectively. The increase in volumetric output compared to the classical breakup and beam-breakup methods occurs due to a decrease in the loss to the side rails.

The implementation of the above methods requires the use of specialized equipment that has not yet been developed. The use of conventional serial sawmill equipment is associated with high labor costs.

The closest in technical essence is the beam-segment method of cutting logs for the production of tangential sawn timber (Aksenov P.P. Technology of lumber [Text] / P.P. Aksenov, N.S. Makarova, I.K. Prokhorov, Yu.P. .Tyukina. - M.: Timber industry, 1976. - 480 p., 33 s), including sawing from the central part of a log of a beam, which is then cut into sawn timber of tangential sawing and mixed sawing. Segments are divided into quarters of irregular shape, which are cut into edged sawn timber of tangential sawing.

The disadvantage of the prototype lies in the fact that when cutting segments, the waste in the slats in volume exceeds the useful volume of tangential lumber, in addition, using the existing sawmill equipment, the cutting proposed by the authors is practically impossible.

The invention solves the problem of increasing the volumetric yield of sawn timber and reducing labor costs.

To do this, in the method of cutting logs to obtain glued lumber, including sawing logs into timber and segments, then cutting segments, according to the invention, the segments are dried before cutting, planed in layers and glued, combining the layers into blocks that are cut by a bar-breakup method into tangential lumber as well as mixed sawing.

The drawing shows a glued block of segments and its cutting into lumber mainly of tangential sawing.

The proposed method is as follows. The segments obtained after cutting the logs are dried, planed over the seam and glued, combining the layers into blocks. Next, the blocks are cut with a beam-breakup method for edged and unedged sawn timber, mainly of tangential sawing, as well as mixed. The letters T and C in the drawing indicate lumber, respectively, tangential and mixed sawing.

The application of the proposed method does not require specialized equipment, can increase the yield of lumber. Compared with the above methods, labor costs are significantly reduced. The described advantages of the proposed method compared to the first and second analogues are explained by the fact that, unlike the first method, where the sectors are glued, and the second method, where the prisms are glued, the segments are glued by the proposed method.

Claims (1)

A method of cutting logs to obtain glued lumber, including sawing logs into timber and segments, followed by cutting segments, characterized in that the segments are dried before cutting, planed in layers and glued, combining the layers into blocks that are cut by a bar-breakup method into tangential lumber, as well as mixed sawing.

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