Abstract:
A sliver compactor is provided between a drafting roller of a drafting frame and the delivery unit which supplies the sliver to the spinning stations of the spinning machine. The sliver compactor has a shielding element juxtaposed with the perforated moving surface to which suction is applied and which reduces the suction force required to draw the fibers of the sliver into a compact form. The shielding element extends over a plurality of slivers and the respective spinning stations and a number of such shielding elements may be aligned over the length of the machine below the stretching field plane and secured on the machine frame.
Abstract:
A drafting frame is provided with at least one compaction unit in which a belt with a perforation under suction serves to draw together the fibers of a drafted roving. The belt is juxtaposed with a stripper spaced from the belt to remove fiber accommodations thereon. The gap between the stripper edge and the belt is adjustable.
Abstract:
To produce a mock yarn which is similar in appearance to a true yarn with respect to the ability to discern the components of the mock yarn after the twist has been imparted to the mock yarn, the rovings or slubbings forming the mock yarn, after drafting separately but parallel to one another in a drafting frame, are subjected separately to condensing and compaction by suction rollers or belts provided with rows of perforations. Thus compacted and condensed rovings are then combined, twisted and wound up as mock yarns. A core thread can be introduced into each roving or into at least one of the rovings upstream of the last pair of drafting rolls or immediately upstream of the condensing unit for a core mock yarn.
Abstract:
A vibration canceler for a shaft rotating about an axis, including an inertial ring which is fastened to the shaft in a relatively twistable manner by at least one elastic ring made of a rubber-like material. The elastic ring contacts the outer circumference of the shaft in a directly abutting manner and is untwistably pressed on to the shaft by the inertial ring.
Abstract:
A compacted yarn is produced by providing a row of orifices subsequent to drafting along which the fiber strand is guided and after which the fiber strand is subjected to a twist according to the invention the suction air flow is monitored at least at one suction location and upon falling below a threshold, a signal is generated which can be used for shutdown or to alert personnel. The result is elimination of the reduction in yarn quality which can occur when the compaction system becomes blocked by lint, fiber accumulation or the like.
Abstract:
A spinning machine in which downstream of the drafting frame and as part thereof, beyond the output rollers thereof, a suction roller is provided above the roving and cooperates with at least one counterroller below the roving to condense the roving before it is wound up on a ring-spinning or pot-spinning station.
Abstract:
A torsional vibration canceler for use on the outer periphery of a shaft which rotates about an axis and includes two enlargements. The torsional vibration canceler includes half-shells that can be pressed onto the outer periphery of the shaft and which are connected, by way of spring elements that can be deformed in the peripheral direction, to at least two inertial masses configured as segments of a circle. The inertial masses are connected to one another by a retaining elements, preferably in the form of at least one ring which surrounds the inertial masses radially and externally. The ring has an inside diameter which is greater than the diameter of at least the smallest of the enlargements.
Abstract:
A method and device for the production of core yarn (63), whereby a core yarn (12) is brought to a fiber slubbing (8) which has been refined in a drafting system before said slubbing is reinforced by twisting. The core yarn (12) is embedded in covering fibers. The fiber slubbing is compressed in a compacting device (22) after the core yarn (12) has been brought to the slubbing and before twisting occurs.
Abstract:
A ring-spinning machine has spindles with head pieces, e.g. with fingers about which the yarn can be wound to reduce the ballooning of the yarn around the respective spindles. The thread-guide eyes above the headpieces can be depressed against a spring force from normal positions to enable the yarn to wind around the fingers and the spring force restores the eyes to their normal positions, thereby avoiding changes in the distances between the normal positions and the headpieces which may alter the spinning properties and yarn quality.
Abstract:
A torsionally flexible coupling having an axis of rotation, comprising a first ring and a second ring that surround one another with radial spacing, such that at least one annularly configured first resilient element made of elastomeric material is arranged in the annular gap formed by the spacing, and such that a belt pulley is mounted, with relative torsional elasticity, on at least one of the rings by a second resilient element made of elastomeric material, the belt pulley being braced at least in the radial direction against at least one of the rings by a sliding bearing. The sliding bearing is made of elastomeric material and is configured integrally and continuously with the first or second resilient element, and the sliding bearing and the first or second resilient element with which it is integrally formed are made of different materials, the materials being adapted to the respective application.