Abstract:
In a texturing system with a texturing nozzle and a first drum (22) connected thereto and a further drum (23), a thread is guided on the outlet side of a texturing nozzle (10) at the circumference of a drum (22) in the form of a strip (1′) by friction and at least in part in positive manner, so that the longitudinal speed of the strip (1) at the circumference of the drum (22) corresponds with the circumferential speed of the drum in the area of the guide (220), whereby, by means of a pressure difference in an air guidance system, the effect is achieved by pressing the strip (1′) onto the surface of the drum (22). Further, the thread is guided in relation to its conveying speed and packing density, by positive and friction guidance under the imposition of air, as far as an outlet point on the first drum, and is transfered onto a second drum (23), on which the strip is cooled, extended if appropriate, and passed on to further guide or conveying rollers (22′) respectively.
Abstract:
In a filament spinning and packaging system, a winder is employed to draw filaments from the filament processing operation at a threadline tension level suited to the processing operation. The winder winds the thread into large cylindrical packages. It includes a control system which may be set to control the tension of the thread entering the outer layer of the package to a level suited to the building of a good thread package, while maintaining a different upstream threadline tension suited to the filament processing operation.
Abstract:
The monitor is spaced a small distance from the curved path of the travelling thread to sense defects in the thread. In one embodiment, the monitoring means is spaced from the winding surface of a chuck to sense broken threads or an accurate build-up of the thread package. The monitoring means includes a detector head with a charge collector rod for sensing changes in electrical potential of the rod due to contact with a travelling thread part. The monitoring means can be moved away from the chuck to maintain a constant distance from the thread package being wound on a bobbin tube on the chuck.
Abstract:
A process for introducing one or more threads into a texturizing nozzle, in which the texturizing nozzle, together with the inlet member, is first brought into a position in which the thread is led transversely past and in the immediate vicinity of the texturizing nozzle, the thread is sucked against the nozzle with the orifice of the inlet member enlarged, immediately after being sucked against the texturizing nozzle the thread is cut beyond the nozzle so that the cut end is sucked back into the nozzle, the suction supply required for the sucking-in is replaced by pressurized fluid texturizing medium, and the cross-section of the inlet orifice of the texturizing device is reduced to a value advantageous for steady state operation.An apparatus for carrying out the above process, comprising a pivotable texturizing nozzle with an inlet member of variable cross-section, and a suction device which permits the pressure to be reduced, relative to atmospheric pressure, at the inlet member of the texturizing nozzle, is also disclosed.
Abstract:
In order to prevent transmitting vibrations which are generated by the turning of a godet to an inductor used for heating the godet, the inductor may be arranged vibration-free on bearings by a vibration damper. The vibration damper may be arranged between a carrying cylinder flange of a carrying cylinder, which accommodates the inductor, and a housing end wall. A further vibration damper ring may be provided between a centering ring, for the radial damping of the inductor, with the carrying cylinder flange being pressed against the vibration damper by screws and a pressure spring being provided between the screw and the carrying cylinder flange for pressing against the carrying cylinder flange.
Abstract:
To determine thread winding parameters for reducing the rate at which deviations from a cylindrical shape are formed in thread packages being wound, thread packages are successively formed by laying thread upon a driven rotary chuck while pressing a driven rotating contact roller against the package in a manner causing a circumferential force to be transmitted therebetween. Each package is inspected for deviations from a cylindrical shape. The generation of slippage is promoted at an interface between the contact roller and package. The amount of promoted slippage is changed between the forming of successive packages to change the rate at which the deformations are formed.
Abstract:
A drawing roller unit is constructed with a godet and an electric motor mounted on a common shaft. A passage is provided throughout the unit to convey a non-flammable scavenging gas through the motor and the godet to reduce the risk of explosion due to sparking by the electric motor and/or other electrical parts of the drawing roller. The gas introduced can leave the unit only through a narrow gap. The pressure of the gas is consequently above atmosphere pressure and prevents the entrance of air.
Abstract:
There are disclosed one-piece chuck structures for use in winding machines and particularly, but not exclusively, for use in high speed winding machines for the take-up of synthetic plastics filament. These one-piece chuck structures comprise a first elongated tubular portion adapted to receive one or more bobbin tubes and a second elongated tubular portion integral with the first elongated tubular portion and of reduced external diameter relative thereto. Bearings cooperate with the exterior of the second elongated tubular portion such that the first elongated tubular portion and the second elongated tubular portion are rotatable about a common longitudinal axis. Also disclosed are hollow bobbin tube-engaging elements as well as double-arm tube-positioning members which can be used with such and other chuck structures.
Abstract:
A texturizing jet for synthetic filaments is openable and closable to facilitate lacing up. A lacing up system is operable in conjunction with the opening and closing mechanism so that the lace-up operation is semi-automatic. At least one of the parts of the jet has a flexible mounting to ensure face to face sealing contact of the parts when the jet is closed.
Abstract:
The controlled magnetic bearing arrangement supports a rotatable shaft and contains an electronic control circuit. The shaft is floatingly supported in the bearing arrangement by magnets controlled by the electronic control circuit and the stiffness of the shaft is thereby adjustable. The shaft may constitute a package support shaft in a winding device of a spinning machine and has a free end for permitting the axial exchange of bobbin tubes and packages. This arrangement provides the advantages of attaining very high rotational speeds for the package support shaft and the possibility of varying the stiffness of such package support shaft and thus the critical rotational speeds. The regions of the critical rotational speeds can be passed through in a safe manner.