Determination some factors affecting value of deviation from plane in the production of MDFLAM

In this study; the particles obtained from woods of 20% Red pine (Pinus brutia Ten) and 80% Oriental beech (Fagus orientalis Lipsky) were fiberized and then pressed to produce medium density fiber board (MDF). After climatized plates were sanded, was covered bar face of plates with rekindle kit in melamine coating press. In order to investigate the amount of deviations of the plate from plane, studies were made on the production of the coating press mass temperature differences, the amount of paraffin, the variation of the paper weight, production at different facility and production with different press sheet metal. The effects of these variables on physical properties (density, humidity ratio, water absorption, thickness increase) and mechanical properties (elasticity modulus, tensile strength perpendicular to the fibers, bending resistance properties) were investigated. The production of the test plates was achieved by coating the lower surfaces of the MDFs in melamine coating presses. The test plates were kept in a climate environment for 15 days at 20 ± 2C and 65 ± 5% relative humidity conditions, and after plates were cut back according to standards, placed in the climate chamber again. When the produced test plates are examined, it is determined that there is no other factor affecting the amount of deviations from plane other than the coating press mass temperature difference. When the physical properties of the plates were investigated, it was determined that the amount of paraffin influenced the density and humidity ratio as an inverse proportion. When mechanical properties were examined, no significant effect was observed. As a result, it has been understood that the melamine coating press mass temperature difference reaches the value of deviation from desired plane (turn-hump) when single face coating production is carried out at 25°C. The results of this study are approved and applied as the acceptance value during the mass production phase. It is the reference point for meeting the demands of different customers in the production of single face coatings.