Technology of gluedbeam production

 

 

     Two forms of glued beam are used in construction: structural (load-bearing elements of structures: beams, supports, roof system components) and profiled (wall beam).

     The process of manufacturing is as follows:

     Saw timber of 12 ± 2% moisture content undergoes automatic optimization on line «Paul» for elimination of defective places. Previously, each board undergoes moisture measurement.

      Jointing of the workpieces onmini-spikeis carried out on the jointing line «Dimter» with adhesives of company «AkzoNobel» on melamine-urea-formaldehyde basis with a moisture-resistance of D4 +.

     Finished lamellas of desired length are kept on the accumulating conveyor during the necessary period  of time according to the technology and then go to the gluing line, where beam is glued under pressure. The maximum height of beam is 220mm, thickness – 600 mm for structural and 220mm for profiled (for reference - the height is determined only by the width of the board).

     For the production of load-bearing wooden structures, for finger-jointing we use melamine-urea glue 1257 with hardener 7557 of Swedish company «AkzoNobel», which gives glue joints high water- and the atmospheric resistance.

    The above mentioned glue system was tested according to Standards EN302 parts 1-4, and approved for compliance with the requirements of EN301 for the production of load-bearing wooden structures by Institute NorskTretekniskInstitutt (NTI), Norway and CentreTechniqueduBoisetdeI'Ameublement (СТВА), France.

       1257 with hardener 7557 are also approved by BUtgb (06/2662) of Belgium.

       The glue system is also tested and approved by Institute MaterialprufungsanstaltUniversitatStuttgart-Otto-Graf-Institut-(MPA), Germany, for the compliance with the requirements of DIN68141 and requirements for the production of load-bearing wooden structures DIN1052.

       Milling of beams to sizes is carried out on the four-sided planer SUPERLES 600 9V.

       After that, beam is packed into transport packets according to the instructions or undergoes further processing.