| 摘要 |
A method and apparatus for melt blowing thermoplastic fibers especially suited for recycled plastic where molten polymer is extruded through a die head (120) into an array of removable nozzles (130), each nozzle (130) having a shoulder backend (131) in contact with the die head (120), and discharged into ambient air while surrounded by a high velocity, high volume discharge of hot air wherein the nozzles (130) are inserted through an array of nozzle holes (300) in the back end (144) of a strand plate (140) bolted to the die head (120), and pass through an air chamber (142) defined by the interior of the strand plate (140), air is heated to high temperatures with a direct flame and channeled to the air chamber (142), the outside face of the back end (144) of the strand plate (140) includes recessed areas (310) corresponding to each nozzle hole (300), for receiving the shoulder back end (131) of each nozzle (130), each of the nozzles (130) can be serviced and replaced simply by releasing the strand plate (140) and withdrawing one or more nozzles (130) therefrom, a desired spatial configuration of and proper alignment of the nozzles (130) is maintained with alignment strands (401/402) placed between the rows and columns of nozzles (130) such that the alignment strands (401/402) and nozzles (130) are in tangential contact, a cover plate (151) with orifices (150) corresponding to and concentric with each of the removable nozzles (130) and having an inner diameter larger than the outer diameter of the nozzles (130) can be placed over the array of nozzles (130) and alignment strands (401/402) such that the nozzles (130) extend through the concentric orifices (150) forming an annulus around the nozzles (130) for uniform discharge of high velocity, high volume hot air around the discharged molten polymer.
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