Effect of species and grinding disc distance on th

Authors: Lidia Gurau Nadir Ayrilmis Jan Thore Benthien Martin Ohlmeyer Manja Kitek Kuzman Sergiu Racasan

Publish Date: 2016/07/15

Volume: 75, Issue: 3, Pages: 335-346

PDF Link

Abstract

Surface quality of medium density fiberboard MDF as a very important criterion for further finishing and utilization was evaluated using a wide range of measuring parameters instruments filters filtering cutoff length measuring length measuring resolution roughness parameters However these various approaches make any data comparison rather difficult Furthermore filtering the measured data with a simple Gaussian filter has proved unreliable for wood surfaces A new more robust approach by using a Robust Gaussian Regression filter together with a previously tested set of measuring and evaluating parameters was used in this paper in order to quantify the surface roughness of MDF manufactured from different species beech poplar birch Scots pine mixture 50  Scots pine and 50  beech and using three different grinding disc distances 006 015 and 06 mm If manufacturing parameters are kept constant the processing roughness of MDF is similar but variable species anatomy and fuzziness effects will give differentiation in total roughness The results indicated that fibers made of a mixture of wood chips from Scots pine and beech led to the smoothest MDF surface followed closely by poplar birch and Scots pine The roughest surface was measured for the panels made of beech fibers Investigating the influence of the grinding disc distance the roughest MDF surface was obtained when a grinding gap of 06 mm was used However surface roughness was found to be quite similar applying a grinding disc distance of 006 mm slightly lower for 015 mm This finding indicates that a too fine grinding gap does not improve the MDF surface roughness

Keywords: