| 摘要 |
Method and apparatus to form, dust free, an organic fiber pad, typically using short staple fiber and dry powder binder. Methods and apparatus for forming an organic (or glass, or mixture of organic and glass) fiber pad wherein all binder, fiber and additives, if any, are handled closed cycle except for the dust collector discharge to atmosphere with all blowby, edge trim and dust, from the picker to the oven, including dust fly, floor drop and binder from the dust collector bags fed back into the closed cycle system. Method and means for feeding fiber into the process piping at a constant rate that can be varied, including blend line feeders which feed a feed apron, suitable blend segments, a picker which assures fine opening of the fibers with fine blends of coarse reclaim, a fiber feeder which operates as a surge area for the blend line, tumbling, lifting, combing and doffing the fiber into a fiber column, and a fiber feeder column which stacks the fiber and feeds it into the process piping at a constant rate that can be varied. A binder feed system and dust condenser recycle system of fiber and binder which cooperates with the fiber column. A first forming section to open and blend the input for a second forming section, as well as present the second forming section with a uniform feed at a constant feed rate. A second forming section which opens the fiber and finish forms the mat under very stable conditions with no process changes required. An air recycle system which handles bleed streams of airborne fiber and binder from the first and second forming sections and also edge trim from the slitter section in recycle to the fiber condenser and from there into the fiber feed system. An air recycle system handling binder input and recycle of binder and fiber from the dust collector system into the first forming section air system.
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