TESTING THE FLATNESS OF SOME COMPOSITE PANELS DESIGNED FOR FURNITURE MANUFACTURING

Camelia COSEREANU
Lecturer dr.eng. - Universitatea "Transilvania" Brasov- Facultatea Industria Lemnului
Address: Str. B-dul Eroilor, nr. 29, 500036 Brasov
Tel: 0040 268 415315, Fax: 0040 268 415315
E-mail: cboieriu@unitbv.ro

Luminita BRENCI
Assist.Prof.dr.eng. - Universitatea "Transilvania" Brasov - Facultatea Industria Lemnului
Address: Str. B-dul Eroilor, nr. 29, 500036 Brasov
Tel: 0040 268 415315, Fax: 0040 268 415315
E-mail: brenlu@unitbv.ro

Dumitru LICA
Assist.Prof.dr.eng. - Universitatea "Transilvania" Brasov- Facultatea Industria Lemnului
Address: Str. B-dul Eroilor, nr. 29, 500036 Brasov
Tel: 0040 268 415315, Fax: 0040 268 415315
E-mail: cboieriu@unitbv.ro

Abstract: The paper presents the results of an experimental research regarding the flatness, as a main characteristic to be fulfilled by the panels which are components of furniture. The composite panels are made of mixed glued lamellas of maple, cherry and walnut wood. The fact of using different species of wood in the same panel rises problems of deformability, because of the different swelling and shrinkage coefficients of the used hardwood species. The initial flatness, obtained after calibration, operation that assures an optimum shape processing accuracy of the panel is checked afterwards and gives information about the flatness stability in time. The flatness testing is compulsory when new technologies and panel structures are proposed. The present paper intending to show an acreditated method of flatness determination, using a modern equipment, with a high measuring accuracy, which is in the endowment of the Laboratory of Testing the Processing Accuracy in Wood Industry, functioning in the frame of the Wood Industry Faculty and accredited by RENAR.

Key words: measuring accuracy, flatness, composite structure panels, stability, OptoDesQ.

REFERENCES
CISMARU, M. (1998). Cercetari privind influenta contragerii furnirelor asupra stabilitatii formei panourilor furniruite. Teza de doctorat (Research Concerning the Influence of Veneer Shrinkage Upon Shape Stability of Veneered Panels. PhD Thesis). Universitatea Transilvania Brasov.
CISMARU, I.; CISMARU, M.; FOTIN, A.; BOIERIU C. (2005). Proiectarea tehnologica in industria lemnului. Prelucrare la forma si dimensiuni. Vol.I. (Technological Design in Wood Industry. Processing to Shape and Dimensions. Vol.I). Editura Universitatii Transilvania Brasov.
BOIERIU, C. (2007). Panouri compozite lignocelulozice. Panouri din lamele de lemn masiv. Editura Universitatii Transilvania Brasov, ISBN (10) 973-635-843-7, (13) 978-973-635-843-2.
ISTRATE, V; ISTRATE, V.S. (2007). Placi compozite din lemn cu textura transversala (Wood Composite Panels with Transversal Texture), revista ProLigno Vol.3, nr.4-2007, pg.55-64, ISSN 1841-4737.
CIONCA, M.; BADESCU, L.; ZELENIUC, O.; GURAU, L. (2006). Panouri obtinute din crengi (Panels Made of Crosscut Branches), revista ProLigno Nr.4, Vol.2 Decembrie, 2006. pg. 35-42. Editata de Fundatia PROLIGNO, ISSN 1841-4737.
BRENCI L.; BOIERIU C. (2007) - Testarea preciziei de prelucrare in Industria Lemnului. Partea 1. Metoda si aparatura de masurare (Testing the Processing Accuracy in Wood Industry. Part 1 - Measuring Method and Equipment), Revista ProLigno vol 3, nr.2, 2007, ISSN 1841-4737, pag. 69-77.
BOIERIU, C.; Cismaru, I.; Brenci, L. (2008) - Testarea preciziei de prelucrare in Industria Lemnului. Partea 2. Posibilitati de testare CADesQ (Testing the Processing Accuracy in Wood Industry. Part 2 - Testing Possibilities) Revista Pro Ligno, vol. 4, nr. 1, 2008, ISSN 1841-4737, pag. 67-73.
BRENCI, L.; CISMARU I.; BOIERIU C. (2008) - Rugozitatea suprafetelor lemnoase interpretata prin utilizarea a doua metode de masurare (The Roughness of Wood Surfaces Interpreted Through Two Measuring Methods). Revista Pro Ligno, vol. 4, nr. 3, 2008, ISSN 1841-4737, pag. 67-74.
*** SR EN 952:2002 - Planeitatea generala si locala. Metoda de masurare.
*** STAS 770-88 - Mobilier din lemn. Conditii generale.
*** Manualul de utilizare pentru echipamentul OptoDesQ. Firma Hecht Electronic A.G., 2003.