Research On Horizontal Extrusion Technology Of Tubular Particleboard

With the improvement of living standard, residential furniture processing has been developed into the distinctive features and wide range of products. Hollow particle board with excellent physical and mechanical properties, is the production of door circuit board, countertops and floor office space ideal material for partition. Overseas, the hollow particle board doors have been as a high-quality core material taken into the market. In China, the tubular particle board production are being in the initial stage of development, it depends mainly European vertical extrusion.China is one of the largest consumers of wood, but relatively poor forest resources and ecological environment is not optimistic. So opening the use of renewable wood savings to suppress tubular particleboard production technology research ideas and consistent the national development strategies.This thesis studied the technology of horizontal tubular particleboard extrusion method, including the following two aspects. On the one hand, the characteristics of the vertical and the horizontal extrusion were analyzed in experimental method. By comparison and experimental design of several extrusion process, a more reasonable and feasible plan of horizontal extrusion is sugessted. On the other hand, under the same conditions, using different wood shavings(primary acicular and mechanical grinded wood savings) to suppress tubular particleboard. And their main mechanical properties were tested.Following main conclusions are obtained:(1) Vertical extrusion has some disadvantages in suppressing tubular particleboard, such as tall equipment, huge power consumption and lower MOE. Suppression of horizontal extrusion hollow particle board is technically feasible, it overcomes the vertical extrusion of the inherent shortcomings of the device. In the direction of particle packing processes to re-arrange, but it is beneficial to the vertical array of particles. Particles full advantage of the characteristics of high tensile strength fiber orientation into the board increase the longitudinal bending strength.(2) The shape and the size of the particle have significant effects on MOE of the tubular particleboard. The board made from need-like particle has higher MOE and lower density. It can meet the requirement of the forest industry standard about the MOE and density of tubular particleboard, followed by the other two kinds.(3) From packing considerations, the size of mechanical grinding recycling particles is uniform. This makes packing process easier, followed by the other two kinds, and need auxiliary feeding device.