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

1)虽然普通的伐木是用锯子沿着原木的纵轴进行，但这台机器可以沿横向加工原木，因此伐木率大大提高。由于鼓片机被用于锯，许多带状木片（股）OSB与伐木同时生产。2)虽然这台机器只能压制长300毫米、直径小于300毫米的原木，但它仍然足以提供设计用于工业实践的全尺寸机器所需的所有信息。3)本机的切割时间与转速和滚筒直径成正比。在满负荷进行的实验中证实了这一点，结果表明，对于直径为300毫米的原木，切割时间仅为3秒。4)在这种情况下，薄片在收集室的平均含水率约为150%。在这种条件下，每单位重量的薄片生产所需的功率估计为2千瓦时/吨（湿）或5千瓦时/吨（干）。一次切割后得到的板材厚度变化小于0.5mm或小于0.5%。试验结果表明，该剥落机可生产出表面光滑、厚度均匀的木材。5)所研制的剥落机可高效、快速地将杉木林薄材加工成尺寸材和钢绞线，用于OSB生产。在低密度条件下，用该纤维制成的osb仍具有良好的性能。这些材料可用作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.