RU2438861C2 - Method of producing glued timber from log side boards (versions) - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention may be used in woodworking. Proposed method comprises drying side boards located in log in symmetry, taper edging and edge slicing, gluing along edge after upturning of faces and ends of one of the boards through 180° and trimming of produced semi-finished product on two ends to make rectangular shape. Side board edges are milled to taper that complies with inclination of edge surface. One of the boards is sawn into two parts in directing saw notch in parallel with the board lengthwise axis of symmetry. Produced three blanks are glued along inclined edges so that sown parts of one board are located on two sides of solid board after upturning boards ends and faces through 180°.

EFFECT: increased bulk yield of sawn timber.

2 cl, 6 dwg

Description

The invention relates to the woodworking industry and can be used in the technology of lumber production.

A known method for producing glued lumber from thin-sized (up to 14 mm in diameter) logs up to 4 m long by cutting them onto trapezoidal section boards, which are then dried, planed and glued along beveled edges into a continuous carpet. Next, the carpet is cut into boards or panels of the required width [D. Pischik Processing of fine raw materials [Text] / D.I. Pishchik // Wood. ru, No. 4, 2005 - p. 48-51].

As a prototype, the method of obtaining glued lumber from the side boards of the log was selected, including drying the side boards symmetrically located in the log, trimming perpendicularly to the edges of their edges along the run and planing, gluing along the edge after turning the plates and the ends of one of the boards 180 ° and trimming the finished product from two ends to give the product a rectangular shape [Aksenov P.P. Technology of lumber [Text]: textbook. / P.P. Aksenov, N.S. Makarova, I.K. Prokhorov - M: Lesn. industry, 1976. - p. 414].

A disadvantage of the known methods for producing edged lumber is the low volumetric yield of wood.

The invention solves the problem of increasing the volumetric yield of lumber.

This is achieved by the fact that in the method for producing glued lumber from the side boards of the log, which includes drying the side boards symmetrically located in the log, trimming along the run and planing their edges, gluing along the edge after turning the plates and the ends of one of the boards 180 ° and trimming the finished product from both ends, to give the product a rectangular shape, according to the invention, the edges of the side boards are milled along the run with a slope corresponding to the inclination of the edge surface; one of the boards is cut into two parts, directing the cut parallel to the longitudinal axis of symmetry of the board; the obtained three workpieces are glued along the inclined edges so that the sawn off parts of one board are after turning their ends and layers 180 ° from two sides of the whole board.

This goal can be achieved by the fact that in the method of producing glued lumber from the side boards of the log, which includes drying the side boards symmetrically located in the log, trimming along the run and planing their edges, gluing along the edge after turning one of the boards 180 ° and trimming the resulting semi-finished product from both ends to give the product a rectangular shape, according to the invention, the edges of the side board are milled along the run with a slope corresponding to the inclination of the edge surface, the board is cut into two parts, the directions propyl parallel to the longitudinal axis of symmetry of the board are glued along the edges preform obtained by inverting one of the pre-blanks ends and reservoir 180 °.

The figure 1 shows the upper end of the log with symmetrically located in it two side unedged boards; in figures 2 and 3 - milled on the run with a slope corresponding to the slope of the edge surface, left and right (optional) edged boards; figure 4 - two workpieces obtained by sawing into two parts along the longitudinal axis of symmetry milled along the edge of the board; figure 5 - glued lumber obtained from three blanks - milled along the edge of one board and two blanks sawn from another board in figure 4; figure 6 - glued along the inclined edges of the lumber obtained from two blanks of figure 4.

To implement the method obtained when sawing logs (figure 1) two symmetrically located unedged boards are dried, and then their edges are milled along the run with a slope corresponding to the inclination of the edge surface (figures 2 and 3). In the first embodiment, one of a pair of milled boards is cut into two parts longitudinally along the axis of symmetry (figure 4). Then these parts are glued together with inclined edges with a milled board, having previously rotated their faces and ends by 180 ° (Fig. 5). In the second embodiment, each edge-milled board is sawn into two parts along the axis of symmetry (Fig. 4), these parts are glued along the edge, so that a rectangular sawn timber is formed (Fig. 6).

The resulting glued lumber can be trimmed and subsequently cut into lumber of the right size. The proposed method allows to reduce the amount of waste compared with the known method by an average of seven times in the first embodiment and six times in the second embodiment.

Claims (2)

1. A method of obtaining glued lumber from the side boards of a log, including drying the side boards symmetrically located in the log, trimming along the run and planing their edges, gluing along the edge after turning the plates and the ends of one of the boards 180 ° and trimming the resulting semi-finished product from two ends for giving the product a rectangular shape, characterized in that the edges of the side boards are milled along the run with a slope corresponding to the slope of the edge surface, one of the boards is cut into two parts, directing the cut parallel to the prod Flax symmetry axis of the board, obtained by three blank glue edges inclined so that the cut pieces of one board appeared after inverting their ends and reservoir 180 ° on both sides of the entire board. 2. A method of producing glued lumber from the side boards of a log, including drying the side boards symmetrically located in the log, trimming along the run and planing their edges, gluing along the edge after turning the plates and the ends of one of the boards 180 ° and trimming the resulting semi-finished product from two ends for giving the product a rectangular shape, characterized in that the edges of the side board are milled along the run with a slope corresponding to the slope of the edge surface, the board is cut into two parts, directing the cut parallel to the longitudinal si symmetry boards; glue the obtained workpieces along the edges, first turning over one of the workpieces with the ends and plates 180 °.

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