公开(公告)号：US11833711B2

公开(公告)日：2023-12-05

申请号：US16724968

申请日：2019-12-23

申请人： LOUISIANA-PACIFIC CORPORATION

发明人： David G. Edwall ,  Shane Chucka ,  Grant Stevenson ,  Mathew Fish ,  Wayne Temple

IPC分类号： B27N1/02 ,  B01F29/60 ,  B01F29/63 ,  B01F29/00

CPC分类号： B27N1/0218 ,  B01F29/61 ,  B01F29/63 ,  B27N1/0263 ,  B01F29/4031 ,  B01F29/40221

摘要： An improved blending apparatus for manufactured wood products with a rotating blending drum or cylinder with a pattern of alternating flights of different configurations extending from the interior of the drum. The flights lift the strands as the drum rotates to different heights before the strands free-fall back to the bottom of the drum. One flight is shorter, and may be trapezoidal in cross-section. The second flight is taller, and may have a “bull-nose” configuration with substantially vertical sides. During operation, the design of the bull-nose flight tends to hold more strands and to carry them closer to the top of the drum before the strands drop and fall. In contrast, the shorter height and angled sides of the trapezoidal flight tends to hold fewer strands and to not carry them as high along the side before strands drop and fall. The alternating pattern causes a more consistent and dispersed fall of strands as the drum rotates, resulting in a significantly larger and more consistent amount of the sprayed adhesives and waxes being applied to the strands, and not passing through gaps to build up on the drum wall.