Address: 17 Naberezhnaya Severnoy Dviny, Arkhangelsk 163002 Russian Federation. Northern (Arctic) Federal University named after M.V.Lomonosov. Office 1425

Phone / Fax: (818-2) 21-61-18
E-mail: forest@narfu.ru
http://lesnoizhurnal.ru/en/

RussianEnglish



Archive

The Study of Deformations in Laminated Wood Being Compressed by a Mould with Various Thickness

Версия для печати
Creative Commons License
These works are licensed under a Creative Commons Attribution 4.0 International License.

А.А. Lukash

Complete text of the article:

Download article (pdf, 0.6MB )

UDС

674.093.026

DOI:

Abstract

Relief plywood has a volumetric pattern on its front surface, which allows us to use it as facing material. At relief plywood glueing we use a mould with various cross-section thickness, which makes the pressure on the veneer package at mould projections and hollows different. Consequently, the front side of relief plywood after glueing has a raised pattern which is the reverse photographic image of the mould pattern. The research aimed to establish the deformations at relief plywood glueing. The objective was to set the parameters of glueing mode, allowing us to predict the thickness of relief plywood. The author used the method of single-factor and two-factor experiments according to Box-Behnken design. To find the optimal parameters of this mode the author used the gradient method. Studying the time-deformation change of veneer package, the auhor established that during the first 2 minutes the deformation is increasing dramatically. Continued pressuring does not increase the deformation significantly. Thus, when gluing relief plywood the author recommends using pressure diagram stating that duration of exposure to the maximum pressure is 25 % of the total duration of pressuring. Plywood thickness after glueing depends on residual deformation, which, in its turn, depends on the basic parameters of glueing mode: pressure and duration of exposure to pressure. It was found that compacting pressure rising from 2.0 to 5.0 MPa makes residual deformation of outer and inner layers increase drastically. Further rise in compacting pressure from 5.0 to 8.0 MPa does not produce any significant increase in residual deformation. Thus, the optimal parameters of relief plywood gluing are the pressure P = 3.3 MPa and duration of gluing t = 5 min. The residual deformation of plywood in the areas of mould projections at these values are 38 %.

Authors

А.А. Lukash, Candidate of Engineering, Associate Professor

Bryansk State Engineering and Technological Academy
Prospekt Stanke Dimitrova, 3, Bryansk, 241037, Russia
e-mail: mr.luckasch@yandex.ru

Affiliation

Bryansk State Engineering and Technological Academy

Keywords

deformation, wood, pressure, temperature, compressing, glueing, mould.

References

1. Kulikov V.A. Problema tochnosti izgotovleniya kleenoy sloistoy drevesiny: dis. … d-ra tekhn. nauk [Precision in Glued Laminated Wood Production: Dr. Tech. Sci. Diss.]. Leningrad, 1966. 419 p. 2. Lukash A.A. Tekhnologicheskie osobennosti izgotovleniya rel'efnoy fanery [Technological Characteristics of Producing Relief Plywood]. Lesnoy zhurnal, 2008, no. 5, pp. 91–96. 3. Lukash A.A. Metodika sozdaniya novykh vidov drevesnykh materialov [Creation Technique for New Types of Glued Wood Materials]. Lesnoy zhurnal, 2011, no. 2, pp. 113–117. 4. Lukash A.A. Deformatsii drevesiny pri skleivanii rel'efnoy fanery [Wood Deformations at Glueing Relief Plywood]. Lesnoy zhurnal, 2011, no. 2, pp. 119–123. 5. Lukash A.A. Opredelenie tseny na novye vidy fanernoy produktsii [Price Determination on New Types of Plywood Products]. Lesnoy zhurnal, 2011, no. 2, pp.134–137. 6. Lukash A.A. Ustroystvo dlya skleivaniya drevesnykh sloistykh materialov [A Device for Glueing Wood Laminates]. Patent RF no. 2212334. 7. Pizhurin A.A. Osnovy nauchnykh issledovaniy v derevoobrabotke [Basic Research in Woodworking]. Moscow, 2005. 304 p. 8. Ugolev B.N. Drevesinovedenie s osnovami lesnogo tovarovedeniya [Wood Science and Fundamentals of Forest Commodity Research]. 3rd ed. Moscow, 2007. 340 p. 9. Khukhryanskiy P.N. Pressovanie drevesiny [Wood Pressing]. Moscow, 1964. 351 p.

The Study of Deformations in Laminated Wood Being Compressed by a Mould with Various Thickness

 

Make a Submission


ADP_cert_2024.png

Lesnoy Zhurnal (Russian Forestry Journal) was awarded the "Seal of Recognition for Active Data Provider of the Year 2024"

INDEXED IN: 

scopus.jpg

DOAJ_logo-colour.png

logotype.png

Логотип.png