Abstract:
An arrangement for pneumatically transporting fiber material flocks through respective chutes to individual carding machines includes a duct which bounds an internal passage that communicates with the chutes, the chutes extending downwardly from the duct. A plurality of control elements is arranged in the passage, respective two of such control elements being situated between each adjacent two of the chutes. Each of the control elements has a substantially plate-shaped control member which is pivotally mounted at the bottom region of the duct, and a block member that extends substantially at a right angle to the control member remotely from the pivot axis and extends toward and into the respective chute. The control element can be pivoted into and arrested in any selected pivoted position, including a closed position in which the block member thereof substantially completely prevents the flow of the transporting medium past the same. The transporting medium carrying the flocks is introduced into either one or into both of the ends of the passage, and the positions of the control elements are so adjusted as to obtain flow speeds upstream of the respective chutes in the range substantially between 2 and 10 m/s; the transporting medium volume can also be adjusted toward this goal. Those of the control elements which are situated between two adjacent chutes may be mounted on a common pivot axle.
Abstract:
A method for enabling the cleaning of fibers in a fiber cleaning machine in which a cleaning stream moves tufts around a rotating cleaning cylinder, the tufts being cleaned and opened. The cleaning action can be adapted to fibers of varying origin and to an increasing degree of opening in the course of cleaning. The cleaning stream is, to a large extent, controlled and controllable by decoupling it from the dynamic behavior of the transport streams which transport material to and away from the cleaning process. Compensation for variations in the cleaning stream, and in the material supplied for cleaning, are achieved by control of the cleaning intensity, in order that the tufts emerging from the cleaning process are constant and optimally cleaned and opened. The invention concerns also suitable fiber cleaning apparatus for the realization of the described method. The apparatus includes a cleaning cylinder positioned in a casing and a plurality of cleaning elements extending from the cylinder. The length, shape and density of the elements can change along the length of the cleaning cylinder so that the cleaning intensity varies along the length of the cylinder. Adjustable grid bars can be positioned below the cleaning cylinder.
Abstract:
In order to extract fiber flocks from fiber bales conveyed on a conveyor belt by very small steps in a predetermined direction of travel, an extraction member is moved over the fiber bales in a direction substantially perpendicular to the predetermined direction of travel of the fiber bales. For this purpose, the extraction member comprises a spiked opening roller driven by a motor. This spiked opening roller conveys, by rotary motion thereof, fiber flocks from the surface of the fiber bales into a fiber-flock conveying channel, in which the fiber flocks are drawn off by a fan and delivered to a conveyor channel. In this conveyor channel, which is likewise a suction fiber-flock conveying channel, the fiber flocks are fed via a connecting line or conduit to a fiber-flock processing location. For moving the extraction member over the fiber bales, the extraction member is provided with wheel shafts and wheels having a profiled tread for guidance along tube-shaped tracks. The wheel shafts are driven by a motor and an associated gearing. A control unit synchronizes the step-by-step forward travel of the fiber bales in the aforesaid predetermined direction of travel with the travel of the extraction member over the fiber bales.
Abstract:
A metering method or a metering apparatus for dispensing predeterminable quantities of fiber flocks per unit time by two feed rollers (18, 20; 18.1, 18.2, 170, 172) which are arranged at the lower end of a flock shaft (14, 14.1, 14.2), which are rotatable in opposite directions and which form a conveying gap between them, with an opening roll (22; 22.1, 180) preferably being arranged beneath the feed rollers, is characterized in that at least one of the feed rollers is biased in the direction of the other feed roller (18; 20.1; 170) and is movable away from the latter under the pressure of the flocks; in that the spacing (x) between the two feed rollers, or a value proportional to this distance is measured; and in that the speed of rotation of at least one of the feed rollers is so regulated that the product (n.multidot.x) of the speed and of the spacing remains constant, at least on average.
Abstract:
A carding element (3) on the periphery of a carding or cleaning roller (1) is arranged to be movable in the direction toward or away from the roller (1) and is movable to selectively present different types or sizes of clothing elements (14.1, 14.2, 14.3 and 14.4) in proximity to the roller (1) so as to effect different actions on the fibers as the clothing elements on the carding element function as counter clothing elements for the clothing (12) of the carding or cleaning roller. This facilitates optimization of the cleaning function obtainable through the cooperation between the clothing (12) on the card drum and the clothing elements (14).
Abstract:
A fiber infeed device supplies fiber material to a textile machine, such as a card, and comprises a driven rotatable feed roll and feed plate. This feed roll is, however, spatially fixed, whereas the feed plate is pivotable but physically immobile during detection of the thickness and thickness variations of the infed fiber material. The feed plate can be pivoted into an operating position against a stop during throughpass of the fiber material. A substantially invariable size nipping zone is thus formed between the driven rotatable feed roll and the stationary feed plate in which a property of the throughpassing fiber material representative of its instantaneous thickness and thus variations thereof can be detected. By positionally fixing the feed plate, for instance, different forces are applied thereto in the nipping zone where the fiber material is compacted. The arising variable forces enable ascertaining thickness variations of the infed fiber material. A further aspect contemplates deriving from the variable forces control signals delivered to a control device for comparison with a predeterminate reference value signal to produce output signals for controlling the rotational speed of the feed roll and thus compensating thickness variations of the infed fiber material.
Abstract:
A method and apparatus for taking-in a fibre layer in blow-room machines wherein the fibre layer is pressed by a number of pivotable pedal levers distributed across the width of the machine, and loaded by a pressing device, against a take-in roll. In the absence of fibre material between the take-in roll and the pedal levers, the pedal levers are temporarily lifted-off the take-in roll.
Abstract:
A main cylinder casing segment for use with a revolving flat on a card, each of the segments including opposite end portions, adapted for fastening on a frame of the card, and a longitudinal body between the end portions for covering the main cylinder. The body includes two plate-shaped parts, a first of the parts has a surface adapted to be inwardly directed toward a working area of the card, during operation of the card, and a second of the parts constituting a stiffener for the segment. Further, the first part of the second part are connected for transferring bending stresses between the parts. The segment is thus formed as a hollow body, preferably extruded.
Abstract:
A method and apparatus for cleaning or carding textile fibers between a fine cleaning or carding drum (2) with clothing (7) fixed thereon and carding elements (5) surrounding said drum, a clothing (9, 10, 11, 12, 13, 14) also being provided thereon. The teeth (9, 10, 11, 12, 13, 14) of the carding elements (5) are so provided differently in the direction of movement (8) of the rotating drum (2) that the tooth (9), for example, has what is known as a negative carding direction with a relatively large angle (.alpha.) and the tooth (14) a positive carding direction with a relatively small angle (.alpha.) and the teeth therebetween have different attack angles as shown in FIG. 3. This gives different cleaning or carding effects within a predetermined peripheral zone of the drum.
Abstract:
Individual fiber components are blended in accordance with the properties of a required intermediate product such as a card sliver or an end product such as a yarn. The fiber bales are combined into component groups and the fiber components in the groups are accurately supplied by metering devices to a blender in which the components are uniformly mixed. The product from the blender may be cleaned and thereafter carded into a sliver. The characteristics of the sliver, such as the color, fiber, fineness and quantity, are tested and adjustments made in the blending in dependence upon any deviation from preset values for the characteristics.