摘要:
A device for automatically doffing bobbins which are positioned between holding centers on support arms of a winding machine. The device is on a mobile carriage which patrols along the machine face and comprises an articulated chute shaped member for the guided discharge of the full bobbin from the winding machine, a presentation member to introduce new tubes, a gripper-type manipulation member which withdraws a new tube from the presentation member of the device and positions it between the holding centers on the bobbin support arm, a yarn positioning member which withdraws the yarn from the full bobbin and disposes it on the new tube, and a sliding belt which rotates the new tube to connect the yarn thereto.
摘要:
Equipment and process to supply winding tubes to individual reeling stations of a textile machine, and to carry out the subsequent insertion of a new winding tube between the bobbin holder arms of a collection station. The equipment comprises an accumulator device to position a number of reserve winding tubes in a spaced and aligned condition enabling transfer of an individual winding device axially to a collecting user device; a belt or cable transfer device for transferring the winding tube in axial position, to a winding station upon request by the winding station, or on a time preceding request; and a device for intercepting, collecting and inserting a new winding tube between the bobbin holder arms of the winding station.
摘要:
A high-productivity bobbin winding method comprising a variable-duration intervention cycle for restoring yarn continuity. The cycle is divided into two parts, of which a first part is devoted to braking the bobbin and a second part is devoted to joining the yarn, between the commencement of the two parts there being interposed a delay which varies as a function of the time measured for the bobbin to come to rest during the preceding intervention cycle.
摘要:
A command and control device for the members carrying out the restoration of thread continuity on coner machines, which maintains the number of interventions of restoration within a maximum preset position, by a central control unit which supplies and conveys the signals between memory registers connected with said control unit; gives the consensus to the interventions conditioned on the verification of the number of interventions taking place; and manages the waiting list of intervention requests exceeding the maximum preset value.
摘要:
A device and method for winding conical bobbins with yarn withdrawn at constant speed from individual spinning units, and comprising: a deflecting roller, which moves backwards and forwards by a swinging arm, which compensates for the different speeds at which the yarn is collected on the bobbin under formation wherein yarn is drawn into the storage position and is then released from this storage position, (i.e. returned). This returning operation releases the yarn from its storage position and replaces it (returns it), to its normal feed path; two proximity sensors which defines the range of swing of the yarn storage and return arm; an electronic control unit which receives an electrical signal from the proximity sensors when the arm swings stray outside the regular range to generate, an electrical control signal which activates a pressure variator which varies the pressure on a disc yarn tensioner. This changes the tension on the yarn to return the storage swing to within the regular range. If irregular swing persists, a bidirectional drive is activated to displace the contact between the bobbin and drive roller to restore the storage swing to within the regular range of values.
摘要:
A device and method for winding conical bobbins with yarn withdrawn at constant speed from individual spinning units, and comprising: a deflecting roller or similar element, which is connected to and moved backwards and forwards by a swinging flat element for yarn storage and accumulation, to compensate the variation in the speed at which the yarn is collected on the conical surface of the bobbin under formation wherein yarn is drawn into the storage position and is then released from this storage position, (i.e. returned). This returning operation releases the yarn from its storage position and replaces it (returns it), to is normal feed path; an electronic or similar yarn tension measurer of known type for measuring the tension values of the yarn being wound and to generate electrical signals proportional to said values; an electrical comparator for comparing said electrical signals with one or more reference signals to generate a control signal when an electrical signal arises which indicates a non-regular yarn tension; an electronic control unit for converting said control signal into a signal which varies the amplitude of the swing motion of a drive source; a drive source which increases or decreases the amplitude of its intermittent drive motion in order to adjust the swing movement of the storage arm to an amplitude which is slightly greater or slightly less than the previous value in order to rapidly restore the yarn tension to within the range of values corresponding to regular tension.
摘要:
The invention provides an injector having a suitably formed head which can partially penetrate through a lateral aperture in a spindle into the vicinity of a chamber containing an expansible capsule.Penetrating into the chamber, the injector laterally displaces the capsule and by injecting through a beak a fluid under pressure creates in the axial passage a negative-positive pressure necessary for transporting the filament.In the vicinity of the chamber there can advantageously be provided a mobile section which is circumferentially displaceable by a projection which is included on the head of the injector, when the injector penetrates or is penetrating the spindle.The injector is further provided with an arm which may be pivoted in the vicinity of the balloon container or on an auxiliary bench.
摘要:
An angular comb for application to suction nozzles for seizing the end of yarns wound in the form of packages, which is formed from a flat plate by precision cutting followed by bending, and comprises toothing having a height/pitch ratio of between 2.5 and 3.5 and having narrow V-shaped lead-ins between the teeth.
摘要:
A bobbin support arm with modulation of the motion transmission between a roller and bobbin to prevent ribboning, by means of a rocker movement between the bobbin and roller determined by the oscillation of the arm both in the horizontal plane and in the vertical plane.
摘要:
A device is disclosed, which is useful for subdividing and diluting an accumulated amount of pirns in bulk, which comprises a chute positioned between a pirn container, and a conveyor belt. The conveyor belt is prearranged to transfer and meter a limited number of pirns. Along the chute, at least one barrier wall is provided, which can move along a vertical, or substantially vertical, direction, and is driven by a drive source, whose enabling is commanded by a level sensor located downstream the same barrier wall. A plurality of movable barrier walls, following each other, transversely prearranged along the chute relatively to the pirn falling motion, can be used. Each barrier wall is driven by a drive source, whose enabling is commanded by a level sensor located downstream of the barrier wall.