Development of Machines for Simultaneous Lumbering and Flaking and for OSB Manufacture

1)虽然常规的伐木是用锯子沿原木的纵轴方向进行的，但这台机器能够在横向加工原木，因此，伐木率大大提高。由于锯机使用的是滚筒式刨花板，所以在伐木的同时产生了许多用于定向刨花板的原木(片材)。2)虽然这台机器可以压制长度只有300 mm、直径不到300 mm的原木，但它仍然足以提供所有有用的信息，为工业实践设计一台全尺寸的机器。3)这台机器的切割时间与旋转速度和滚筒的直径成正比。这在满负荷下进行的实验中得到了验证，该实验表明，对于直径为300 mm的原木，切割时间仅为3秒。4)在这种情况下，收集室中的薄片的平均含水率约为150%。在这种情况下，每单位重量的鳞片生产所需的电力估计为2千瓦时/吨(湿)或5千瓦时/吨(干)。经过一次切割后，所得板材厚度的变化小于0.5 mm或小于0.5%。这表明，用这种刨花板磨可以生产出表面光滑、厚度均匀的木材。5)研制的刨花板磨效率高、速度快，可将糖木种植间伐成规格材和单板材，用于生产OSB。由该股线制成的OSB即使在低密度下也具有非常好的性能。这些材料可以作为结构胶合板的替代品。

1) Although ordinary lumbering is conducted along the longitudinal axis of a log with saws, this machine was able to process logs in the lateral direction, therefore, lumbering rate increased considerably. Since drum flakers were used for the saws, a lot of strand-type wood flakes (strands) for OSB were produced simultaneously with the lumbering.2) Although, the machine could press logs of only 300 mm in length and less than 300 mm in diameter, it is still good enough to provide every information useful to design a full-scale machine for industrial practice.3) The cutting time for this machine is proportional to the speed of rotation and the diameter of the drums. This was verified in an experiment conducted at full capacity which showed that the cutting time was only 3 sec for a log with 300 mm in diameter.4) In this case, the average moisture content of the flakes at the collection chamber was about 150%. At this condition the power requirement per unit weight of flake production was estimated at 2 kWh/ton (wet) or 5 kWh/ton (dry). The variation in the thickness of the resulting planks after one-pass cutting was less than 0.5mm or less than 0.5%. This shows that lumbers with smooth surface and uniform thickness can be produced with this Flaking Mill.5) The Flaking Mill developed was highly efficient and extremely fast for the processing of sugi plantation thinnings into dimension lumber and strands for OSB production. OSBs manufactured from the strands had very good properties even at low density. These could be used as alternatives to structural plywoods.