摘要:
Described is a carding machine designed preferably to operate in a system for producing padding, which has a particular variability in the type of air processing which may be performed by the machine on the fibres, together with a greater simplicity of management of the configuration of the machine compared with prior art systems.
摘要:
The machine for making a non-woven material aerologically has a forming and conveying surface permeable to air, a dispersion chamber surmounting said surface and means, particularly vacuum means located under said forming and conveying surface of the non-woven material, which are capable not only of producing an air flow inside the dispersion chamber that allows the fibers inside the chamber to disperse and projects them onto the forming and conveying surface, but also create a vacuum in one zonenullcalled the vacuum zone (9)nullof the forming and conveying surface (1) of the non-woven material that extends under the dispersion chamber (2) and downstream from it, with the vacuum speed decreasing between the upstream and downstream parts of said zone (9). The wall downstream (4) from the vacuum chamber (2) is a plate, and the lower edge (12) of said downstream wall (4) delimits, along with the upper end (1a) of the forming and conveying surface of the non-woven material (1), a space for passage whose height is greater than the thickness of the non-woven material (13) coming out of the dispersion chamber (2).
摘要:
A fiber web is formed by the airlay technique on a web forming and transport surface by dispersing and projecting individualized fibers onto said surface by means of a flow of air, and the fibers are subjected to a carding operation prior to being inserted into the flow of air. According to an essential characteristic of the invention, action is taken on the fiber feed rate by means of one or more regulator systems between the carding operation and the insertion of the fibers into the air flow so as to make said fiber feed rate more regular. In a preferred variant of the invention, a regulator system comprises at least a combing cylinder which is designed to be rotated to have a circumferential speed that is strictly less than that of the carding cylinder and that rotates in a direction of rotation that is opposite to that of the carding cylinder, and that is coated on its periphery with a covering whose teeth or spikes point backwards, i.e. in the opposite direction to its direction of rotation.
摘要:
A card apparatus for producing an aerodynamically formed fibrous web (4), includes a fiber feed means (6), a main cylinder (8) rotating at high speed and a shaft (10) arranged at main cylinder (8), the shaft transporting thrown-off fibers in an airflow (12) to an air-permeable web transport means (14) and disposing said fibers on said web transport means (14) in the form of a fibrous web (4). In this apparatus the main cylinder (8) throws off said fibers at a first location (22) of shaft (10) onto a second cylinder (20) rotating at high speed in opposite sense to main cylinder (8) and generating a random orientation of said fibers on cylinder (20), and the second cylinder (20) throws off said fibers into airflow (12) at a second location (24) of shaft (10).
摘要:
The card for producing a fiber includes a swift and a doffer which takes the carded fibers off the swift and supplies them to a nip formed between at least two rotating rollers. The fiber web emerging from the nip is deposited on the top run of a transverse conveyor which moves axially of the rolls between guide rollers in order to convey the fiber web laterally away from the card. The conveyor has a shoulder on at least one longitudinal side against which the fiber web may abut during travel along the transverse conveyor.
摘要:
In conjunction with a randomizing web former is disclosed means for regulating the pressures subsisting within the jamming slot of the randomizing web former formed between the arcuate toothed surface of a carded staple fiber bearing cylinder and a confining surface mounted adjacent thereto. The regulating means includes a housing one wall of which is perforate so as to provide gaseous intercommunication with the interior plenum thereof, in which resides a pressure sensing element interconnected with a control element such as a preprogrammed computer. The plenum intercommunicates with a pressure adjusting device, and the latter is operatively interconnected with the control element. Signal from the sensor reflecting the then pressure within the jamming slot when received by the control element is compared with a target or desired pressure; any difference calculated is transmitted in the form of a command signal to the pressure adjusting device which forces more air into the plenum and thus into the jamming slot in instances of sensed pressures below the target pressure, or removes air as by a vacuum from the plenum and thus reduces pressure in the jamming slot when the sensed pressure there is greater than the targetted pressure desired.
摘要:
The generally parallelized orientation of fibers being removed from the doffer of a card is randomized by withdrawing the web of fibers by means of a pair of conveyor belts and a vacuum slot situated adjacent to the rotating doffer surface.
摘要:
In an intermediate card for manufacturing nonwovens of fibrous material, with a drawing-in means (2), with at least one main cylinder (4), and with several fiber take-off means (6a, 6b, 6c) for taking over at least two card webs from the main cylinder (4), the at least two card webs being adapted to be deposited as a nonwoven onto a common conveying belt of a conveying means, it is provided that each fiber take-off means (6a, 6b, 6c) transfers the taken-off card webs onto transfer sections (15a, 15b, 15c, 15d) circumferentially offset with respect to each other and forming part of a permeable conveying surface (15) curved in a circularly cylindrical manner, the circumferential speed of which is adapted to the transfer speed of the card webs at the transfer sections (15a, 15b, 15c, 15d) as to direction and amount, the transfer sections of the conveying surface (15) being sucked.
摘要:
Method and device for discharge and cleaning of the web produced by a carder, by the effect of suction applied to the web, in its passage from the detachment cylinder to the web-presser cylinders, preferably combined with drawing of the web in this section, by the effect of actuation of the web-presser cylinders, at a linear speed which is higher than that of the detachment cylinder.