Strengthening of veneers for 3D-forming. 3D - forming of veneers is used only in limited extent. The reasons are wood properties, mainly anisotropy of wood. In this paper, we propose some chosen methods for strengthening of veneers in directions parallel and perpendicular to the grains, with strengthening means such as hotmelt adhesive and glass fibre with adhesive coating. Properties of modified veneers were compared with the properties of reference - untreated veneers. We compared these properties: strength and deformations - extension in tension, strength and deflection in bending, and 3D - formability. From the results, we can conclude that referred treatments resulted in a slight improvement of 3D - formability.
The article is oriented at investigation of beech veneer compression by cyclical pressing. We selected different methods of cyclical pressing (procedures A, B, and C), which differed in pressing and releasing of compressive force. Also we selected different initial moisture content of veneers (8 % and 16 %) and pressing temperature (20 °C, 100 °C, 150 °C). We investigated veneer thickness and its change after pressing at degree of pressing of 30 %. All selected factors influence veneer thickness significantly.