Shape stability of laminated veneer products - An experimental study of the influence on distortion of some material and process parameters

被引：7
作者：
Blomqvist, Lars [1 ]
Johansson, Jimmy [1 ]
Sandberg, Dick [1 ]
机构：
[1] Linnaeus Univ, Dept Forestry & Wood Technol, SE-35195 Vaxjo, Sweden
来源：
WOOD MATERIAL SCIENCE & ENGINEERING | 2013年 / 8卷 / 03期
关键词：
Beech; bending; birch; moulding; spring-back; thermo-hydro-mechanical processing; twist; wood;
D O I：
10.1080/17480272.2013.803501
中图分类号：
TB3 [工程材料学]; TS [轻工业、手工业、生活服务业];
学科分类号：
0805 ; 080502 ; 0822 ;
摘要：
A shortcoming of the laminated bending process is that the products may become distorted after moulding and during use. In this study, we have examined the influence of different UF-adhesive systems, adhesive distribution, and veneer properties such as species, moisture content, and fibre orientation. Two different species were studied: beech (Fagus silvatica L.) and birch (Betula pubescens Ehrh.). Distortion was determined directly after moulding and after storage in a changing relative humidity. The aim of the work was to study how the above-mentioned material and process parameters influence the distortion. The results show that the material and process parameters and the storage in a changing relative humidity had a clear impact on distortion. Fibre orientation, differences in moisture content between veneers, and the moisture gradient in the final product are identified in this study as being the most important parameters influencing the distortion and shape stability of laminated veneer products.
引用
收藏
页码：198 / 211
页数：14
相关论文
共 20 条
  • [11] Ormarsson S., Sandberg D., Numerical simulation of hot-pressed veneer products: Moulding, spring-back and distortion, Wood Material Science and Engineering, 2, 3-4, pp. 130-137, (2007)
  • [12] Srinivasan N., Bhattacharyya D., Jayaraman K., Thermoforming of wood veneer composite sheets, Holzforschung, 61, 5, pp. 558-562, (2007)
  • [13] Srinivasan N., Jayaraman K., Bhattacharyya D., Profile production in multi-veneer sheets by continuous roll forming, Holzforschung, 62, 4, pp. 453-460, (2008)
  • [14] Stevens W.C., Turner N., Solid and Laminated Wood Bending, (1948)
  • [15] Stevens W.C., Turner N., Wood Bending Handbook, (1970)
  • [16] Suchsland O., The Swelling and Shrinkage of Wood. A Practical Technology Primer, (2004)
  • [17] Suchsland O., McNatt J.D., Computer simulation of laminated wood panel warping, Forest Products Journal, 36, pp. 16-23, (1986)
  • [18] Wagenfuhr A., Buchelt B., Pfriem A., Material behaviour of veneer during multidimensional moulding, Holz als Roh- und Werkstoff, 64, 2, pp. 83-89, (2006)
  • [19] Wu Z.-H., Furuno T., Yoshihara H., Calculation models of pressure and position of curved laminated veneer lumber in molds during pressing, Journal of Wood Science, 45, 3, pp. 213-220, (1999)
  • [20] Zemiar J., Choma P., The shape stability of formed laminated wood, Wood Research (DrevarskyVyskum), 47, pp. 35-43, (2002)
12