Wood-based boards mechanical properties and their effects on the cutting process during shredding

Abstract

In order to design effective shredding machines dedicated to shredding wood-based waste, information about the mechanical properties of materials subjected to shredding is necessary. A number of mechanical properties of particleboard, oriented strand boards, and medium-density fibreboards in the aspect of shredding process have been experimentally determined in the article. The influence of material type, blade geometries, and cutting depth on cutting force and elasticity coefficient were analysed. Blade geometries reflect different phases of rotation of the cylindrical wood chipper’s knife. It has been shown that a knife with the most favourable geometry is characterized by the lowest values of the stiffness coefficient for each of the materials. This is the geometry of the cylindrical wood chipper’s knife exactly halfway into the cutting process. By contrast, the least favourable geometry is characterized by a knife corresponding to the beginning of the cutting process. Among the tested materials, the medium density board requires the most energy to change its structure, and the laminated particleboard requires the least. The presented results can be a set of input data necessary to model the work required to implement the cutting process, but also enable validation of existing cutting models.

Investigation on Cutting Power of Wood–Plastic Composite Using Response Surface Methodology

“…It can be found that the cutting power is negatively correlated with the rake angle, but positively correlated with other three factors, including cutting speed, depth of cut, and flank wear. In related work, with the aim of exploring the wood-based panel's mechanical properties during shredding, the cutting and elasticity coefficients with particle board, oriented strand boards, and medium-density fiberboard were explored by Kukla and Wargula [27] at different cutting conditions of blade geometries and cutting Forests 2022, 13, 1397 6 of 11 depth. In the selected cutting parameters, cutting depth plays a crucial positive role in affecting the cutting force.…”

Properties of Un-Torrefied and Torrefied Poplar Plywood (PW) and Medium-Density Fiberboard (MDF)

“…Medium-density fiberboards are produced from a series of lignocellulosic fibers, following a thermal and mechanical process of defibration that uses the combined action of heat with mechanical energy to break the bonds between cells [6,23]. Depending on the manufacturing process of MDF, fibers with a high degree of fibrilization are used for the wet process, and long and thin fibers are used for the dry process [9,[25][26][27][28][29][30][31]. To obtain MDF, small-diameter fibers are used, so that a degree of compressibility is achieved without additional energy consumption [29].…”