RU2561748C2 - Method of production of lumber from round timber affected by radionuclides - Google Patents

Abstract

FIELD: agriculture.

SUBSTANCE: invention relates to timber industry, in particular to production of lumber. To obtain lumber from round timber affected by radionuclides, the timber is fixed with the healthy peripheral zone, the shape and parameters of the affected layer are determined, the timber is divided for parts in the longitudinal direction parallel to the central axis. Initially end-cutting of the timber is carried out for shock bolts of the given length. The shock bolts are divided into sectors, as well the affected parts are separated from the sectors by riving. Then the unaffected part of the sector is crushed or dried and the surfaces of the unaffected parts are machined by milling, and the resulting preforms are fastened then together by gluing.

EFFECT: increased yield of lumber, decreased energy consumption of the production process of lumber.

10 dwg

Description

The present invention relates to the forest industry and can be used in the manufacture of lumber.

A known method of cutting round timber affected by radionuclides, including fixing timber for a healthy peripheral zone, determining the shape and parameters of the affected layer and performing division in the longitudinal direction along mutually perpendicular planes parallel to the generatrix, tangent to the inner border of the affected layer, while separating the affected areas, the remaining part is divided in the longitudinal direction along mutually perpendicular planes through the contact lines of healthy wood with the remaining expressions layer. Timber obtained after removal of the affected layer is divided in a longitudinal direction parallel to the generatrix of the side parts and the remainder, the side parts are turned relative to each other by 180 ° in vertical and horizontal planes, mate the processing surface and connect to each other along the edge [1].

The disadvantage of this method of cutting is the low volumetric yield of sawn timber.

There is also another method for cutting round timber, characterized in that in the places where the cuts are made by cutting organs, the affected layer is removed with a processing width greater than the cut width. Then, timber is cut into lumber without transferring radionuclides in the division plane, the resulting lumber is based on one of the processing surfaces and the side parts with radionuclides are parallel formed [2].

This method is adopted as a prototype, as the closest to the proposed result and technical features.

The disadvantage of the prototype is the low volumetric yield of sawn timber and high energy consumption of the cutting process.

The technical result of the invention is to solve the problem of cutting round timber affected by radionuclides, with obtaining environmentally friendly sawn timber, increasing the yield and reducing the energy intensity of the wood cutting process.

The technical result is achieved by initially trimming the timber into churaks of a given length, dividing them into parts by splitting into sectors, also splitting the affected parts from the sectors, and the remaining unaffected part is crushed. Also, after separation of the affected layer, it is possible to dry the obtained parts and process their surfaces, for example, by milling. The preforms obtained after this are fastened together, for example, by gluing.

Figure 1 shows the cuttable round timber affected by radionuclides; figure 2 is a section aa of figure 1; figure 3 shows the churk affected by radionuclides; figure 4 is a section bB of figure 3; figure 5 shows a separate sector affected by radionuclides; figure 6 is a section bb In figure 5; 7 shows a sector obtained after removal of the affected layer; on Fig - section GG of Fig.7; figure 9 shows interconnected machined sectors; figure 10 is a section DD of figure 9.

The method of cutting round timber affected by radionuclides is as follows.

Round timber 1, affected by radionuclides 2, is fixed for a healthy peripheral zone, the shape and parameters of the affected layer are determined. Next, trimming of timber 1 for churaki 3 of a given length. Then the churaks 3 are split into sectors 4, from which part 5 with the affected layer 2 is separated. The remaining unaffected part 6 is crushed. It is possible to dry the unaffected parts 6 and mechanically process their surfaces, for example, by milling to obtain blanks 7. The resulting blanks 7 are bonded to each other in sawn timber 8, for example, by gluing.

Using the proposed method for cutting round timber affected by radionuclides, it allows to increase the volumetric yield of environmentally friendly sawn timber while reducing the energy intensity of the wood cutting process.

Information sources

1. RF patent No. 2247022, B27B 1/00, 2003.

2. RF patent No. 2350460, B27B 1/00, 2008.

Claims (1)

A method of producing sawn products from round timber affected by radionuclides, including fixing the timber for a healthy peripheral zone, determining the shape and parameters of the affected layer, dividing the timber into pieces in the longitudinal direction parallel to the central axis, characterized in that the timber is initially trimmed into churks of a given length, divided churaks into sectors, and also separate the affected parts from sectors by splitting, after which the unaffected part of the sector is crushed or dried and mechanically The esk treat the surfaces of the unaffected parts by milling, and the resulting blanks are then bonded together by gluing.

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