| 摘要 |
<p>Vitreous fibers are produced by spinning a glass melt by making use of an apparatus comprising a centrifugal spinner (1) a chamber (2) having a collecting portion (3) with a spinner end (4) located in close proximity of the centrifugal spinner (1), and which extends forwards from the spinner end and which comprises side walls (12) a top wall (14) and an upwardly inclined base being defined by a collector (16) mounted to receive fibers blown from the spinner (1) and to carry the fibers as a web out of the chamber (2), and suction means for applying suction through the collector (16), and in this apparatus the chamber also comprises a spinner portion (5) which has a rear end (5) which is substantially open to the atmosphere and a front end (7) which opens into and merges with the collecting portion (3), and a substantially tubular duct (8) which extends between the front end (7) and the rear end (6), whereby the collecting portion (3) of the chamber is substantially closed to the ingress of air except for air forced through the spinner (1) and air which is sucked through the tubular duct (8) and, optionally, a lesser, non-interfering, amount of air sucked or forced through supplementary air passages in the spinner end (13) of the collection portion (3). The front end of the spinner (1) and the front end (7) of the spinner portion (5) together define a substantially open annular collar between them, whereby at least 50 percent of the cross-sectional area of the front end (7) of the spinner portion (5) is open to the flow of air sucked through the spinner portion (5) by the action of the suction means (19). The spinner (1) and the tubular duct (8) are constructed to provide substantially steady air flow conditions through the collar.</p> |
