Method and apparatus for the comminution of wood
阅读：661发布：2022-01-19
专利汇可以提供Method and apparatus for the comminution of wood专利检索，专利查询，专利分析的服务。并且Pointed wood particles for use in the production of pressed board or in the paper or cellulose industries are made by shaving a wood body in the direction generally transverse to a major dimension thereof and inclined at an acute angle to the grain to produce shavings which are thereafter broken up to form the particles. The apparatus comprises a drum whose blades along the exterior are provided with slots through which the shavings pass into the interior of the drum and are conveyed by a worm, belt or flight conveyor within the latter.，下面是Method and apparatus for the comminution of wood专利的具体信息内容。
1. A method of producing wood particles, comprising the steps of shaving a body of wood having a predetermined grain orientation in a direction transverse to the grain orientation but intersecting same at an acute angle of substantially 7* to 20* to produce shavings having a thickness of 2 to 3 mm and having a grain extending at an angle of substantially 7* to 20* to the cut surfaces of the shaving; and breaking said shavings into particles along the grain of the shavings whereby said particles have acute-angled ends by feeding said shavings in the direction of the grain thereof against a transversely moving surface.
2. The method defined in claim 2 wherein , in the step of breaking said shavings into particles, said shavings are first broken into smaller pieces and said pieces are thereafter milled to produce said particles.
3. The method defined in claim 2 wherein prior to milling of said pieces and after the shavings are broken into smaller pieces, said pieces are treated with steam at atmospheric pressure .
4. The method defined in claim 1 wherein said shavings are removed from said body at a speed of 6 meters per second.
5. An apparatus for comminuting wood, comprising a drum rotatable about an axis, a plurality of angularly spaced axially extending shaving blades mounted in said drum and projecting outwardly thereof for cutting respective shavings from a wood body urged against said drum, said drum being formed with respective slots adjacent each of said blades and passing the respective shavings into the interior thereof, means for feeding a wood body at an acute angle of substantially 9* to 20* to the drum axis against the periphery of said drum, and means within said drum for comminuting said shavings and conveying the wood particles resulting from comminution of said shavings out of said drum.
6. The apparatus defined in claim 5 wherein the last-mentioned means includes a conveyor worm rotatable within said drum.
7. The apparatus defined in claim 6 wherein said conveyor drum has at least one thread closely approaching an inner wall of said drum, further comprising means for driving said drum and said worm in opposite senses whereby said worm engages said shavings as they pass through said slots to comminute said shavings.
8. The apparatus defined in claim 6, further comprising a trough receiving said worm, said worm being coupled with said drum for rotating jointly therewith, entraining fingers formed on the interior of said drum for carrying said shavings therewith, and a stripper interleaved with said fingers and mounted on said trough for cooperating with said fingers to break up said shavings and deposite same in said trough.
9. The apparatus defined in claim 5 wherein the last-mentioned means includes a trough extending in said drum and having an upwardly open portion, entraining means mounted along the interior of said drum for entraining said shavings therewith, a stripper mounted on said trough and interleaved with said entraining means for comminuting said shavings to produce wood particles and depositing same in said trough.
10. The apparatus defined in claim 9 wherein a plurality of suCh strippers is provided.
11. The apparatus defined in claim 9, further comprising a conveyor worm rotatable in said trough for advancing said particles out of the latter.
12. The apparatus defined in claim 9, further comprising a belt conveyor in said trough for advancing said particles out of the latter.
13. The apparatus defined in claim 9, further comprising a flight conveyor in said trough for advancing said particles out of the latter.
14. The apparatus defined in claim 13, further comprising a perforated plate cooperating with the flights of said conveyor for further comminuting said particles.
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