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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Qualidade da Madeira Serrada e dos Pain?is Colados Lateralmente Obtidos de um Plantio de Eucalyptus saligna Smith Visando o Segmento Moveleiro / Quality of the Sawnwood and Glued Panels Obtained of a Eucalyptus saligna Smith Plantation for Furniture Industry

Amparado, Kelysson de Freitas 23 August 2008 (has links)
Made available in DSpace on 2016-04-28T14:56:18Z (GMT). No. of bitstreams: 1 2008 - Kelysson de Freitas Amparo.pdf: 3210670 bytes, checksum: fc139c4d95da126bd1c41d4980ceb74a (MD5) Previous issue date: 2008-08-23 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / In this research were studied thirty trees of Eucalyptus saligna Smith wood, sampled in a twenty year-old plantation located in Serop?dica/RJ. Each tree supplied a log with 2.30 meters in length for the study of the sawn process and panels production ( PCLs ). The processing of the logs was made in the LPZ Madeiras and Artefatos Ltda sawmill - Pira?/RJ, being determined the revenue in sawnwood. Later on, the boards went by the process of artificial drying, with controlled conditions, in the Laboratory of Wood Drying, of the Forest Products Department, of the Forest Institute, of UFRuralRJ. In the qualitative evaluation, were determinate the defects indexes of the wood after drying. Smaller pieces were produced and were used in the glued panels production. The glued panels were produced from four treatments, for comparison among them, being these: simple panel with simple top connection (T1), simple panel with finger-joint connection (T2), double panel with simple top connection (T3), and double panel with finger-joint connection (T4). Were quantified the revenue of the conversion of the logs in sawnwood; the qualitative indexes of boards defects after the artificial drying; the revenue of the conversion of the boards in glued panels (being eliminated defects as cracks and severe torsion); and the resistance properties of PCLs through the shear, traction and static bending tests, following normative procedures of the document ABNT NBR 7190:1997 and ASTM D-1037. As practical example of the application of the eucalyptus glued panels was produced an experimental furniture (armchair), being discussed the problems and solutions found in the application of the studied material. / Neste trabalho foram avaliadas trinta ?rvores do g?nero Eucalyptus saligna Smith, amostradas em um talh?o de vinte anos de idade localizado no campus da Universidade Federal Rural do Rio de Janeiro, em Serop?dica/RJ. Cada ?rvore forneceu uma tora com 2,30 metros de comprimento cada uma, para o estudo do processo em escala piloto de obten??o de madeira serrada e pain?is colados lateralmente (PCLs). O processamento das toras foi efetuado na serraria LPZ Madeiras e Artefatos Ltda., em Pira?/RJ, determinando-se o rendimento em madeira serrada. Posteriormente, as t?buas passaram pelo processo de secagem artificial, em c?mara de secagem automatizada com condi??es controladas, no Laborat?rio de Secagem, do Departamento de Produtos Florestais, do Instituto de Florestas da UFRuralRJ. Na avalia??o qualitativa, foram avaliados os ?ndices de defeitos na madeira ap?s secagem. A seguir as t?buas foram levadas para o Laborat?rio de Usinagem e Beneficiamento da Madeira do DPF/IF/UFRuralRJ, onde foram resserradas, produzindo sarrafos, que foram utilizados na confec??o de pain?is colados lateralmente e de um m?vel (poltrona). Os pain?is colados lateralmente foram produzidos a partir de quatro tratamentos, para compara??o entre eles, sendo estes: painel simples com emendas de topo (T1), painel simples com emendas tipo finger-joint (T2), painel com dupla camada de sarrafos com emendas de topo (T3), e painel com dupla camada de sarrafos com emendas tipo finger-joint (T4). Foram quantificados o rendimento da convers?o das toras em madeira serrada; os ?ndices qualitativos de defeitos presentes nas t?buas ap?s a secagem artificial; o rendimento da convers?o da madeira serrada em pain?is colados lateralmente (eliminando-se defeitos como rachaduras, n?s soltos e empenamentos severos); e as propriedades de resist?ncia dos PCLs atrav?s dos ensaios de cisalhamento e tra??o, adaptados ao material e seguindo procedimentos normativos do documento ABNT NBR 7190:1997 e ensaios de flex?o orientados pelo documento normativo ASTM D-1037 (norma americana). Como exemplo pr?tico da aplica??o dos pain?is colados de eucalipto foi produzido um m?vel (poltrona), sendo discutidos e avaliados os problemas e solu??es encontrados na aplica??o do material estudado.

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