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METHOD OF AND APPARATUS FOR MANUFACTURING FIBRE,ESPECIALLY ASBESTOS-CEMENT BOARDS

机译:制造纤维,尤其是石棉水泥板的方法和装置

摘要

In the production of, for example, asbestos cement boards, a felt belt is guided through a deposition box in which an asbestos cement slurry is disposed. A mat is deposited from the slurry onto one side of the felt belt and the mat is sucked onto the felt belt, for which purpose a suction device is present on the other side of the felt belt. In order now to obtain boards of uniform thickness and strength, a cylindrical screen/couching roll arrangement (18, 19) which compacts and dewaters the deposited mat is disposed downstream of the deposition box (6). The suction of the mat takes place by a subatmospheric pressure which is locally variable in the longitudinal direction and/or lateral direction of the felt belt. To this end the suction box is subdivided into individual boxes (8, 9) which are arranged one behind the other in the conveying direction and, if appropriate, one next to the other across the felt belt width. Preferably an adjustable cover screen (10) is arranged in the deposition box (6), such that a flow channel (11) for the asbestos cement slurry is produced between said cover screen (10) and the felt belt (3). This flow channel promotes the desired irregular orientation and uniform density of the asbestos fibres in the mat. IMAGE
机译:在例如石棉水泥板的生产中,将毡带引导通过沉积箱,在沉积箱中放置石棉水泥浆。将垫子从浆液中沉积到毡带的一侧,并将毡垫吸到毡带上,为此目的,在毡带的另一侧设有抽吸装置。为了获得厚度和强度均一的板,在沉积箱(6)的下游设置了一个圆筒形的筛网/滚辊装置(18、19),其将沉积的垫压实并使其脱水。垫子的抽吸是通过低于大气压的压力进行的,该压力在毡带的纵向和/或横向上是局部可变的。为此,抽吸箱被细分为单独的箱(8、9),这些箱在输送方向上一个接一个地布置,并且在适当的情况下,在毛毡带的宽度上一个接一个地布置。优选地,在沉积箱(6)中布置有可调节的覆盖筛网(10),使得在所述覆盖筛网(10)和毡带(3)之间产生用于石棉水泥浆的流动通道(11)。该流动通道促进了垫中石棉纤维的所需不规则取向和均匀密度。 <图像>

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