Classifications

• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01H—SPINNING OR TWISTING
  • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01H—SPINNING OR TWISTING
  • D01H13/00—Other common constructional features, details or accessories
  • D01H13/32—Counting, measuring, recording or registering devices
• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01H—SPINNING OR TWISTING
  • D01H15/00—Piecing arrangements ; Automatic end-finding, e.g. by suction and reverse package rotation; Devices for temporarily storing yarn during piecing
• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01H—SPINNING OR TWISTING
  • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
  • D01H4/42—Control of driving or stopping
  • D01H4/44—Control of driving or stopping in rotor spinning
• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01H—SPINNING OR TWISTING
  • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
  • D01H4/48—Piecing arrangements; Control therefor

Definitions

• the present invention relates to a method for operating a spinning machine having a plurality of spinning stations, wherein the individual spinning stations are each supplied with a fiber material during a spinning operation and produce a yarn therefrom, wherein the yarn production is interrupted when predefined events occur at individual or all spinning stations, wherein the spinning stations at which the yarn production has been interrupted, are spun on demand by means of a piecing operation to restart the yarn production, and wherein the respective piecing operation is carried out with the aid of spinning machine own handling means.
• a spinning machine with a plurality of spinning stations for the production of yarn wherein the spinning stations each have at least one spinning unit with an inlet for a fiber material and an outlet for the yarn produced from the fiber material, and wherein the spinning stations each have a winding device for winding the produced yarn and a yarn monitoring unit for monitoring at least one yarn parameter of the yarn leaving the respective spinning unit.
• Spinning machines of the generic type can be designed, for example, as air-spinning machines which serve to produce a yarn from a strand-shaped fiber material (eg a sliver) with the aid of a swirling air flow generated by air nozzles within a swirling chamber.
• a strand-shaped fiber material with the aid of a delivery device which is preferably formed by a pair of starter rollers upstream of the spinning unit in the spinning direction of a drafting system, in the direction of Promoted spinning unit and sucked by this by vacuum or sucked.
• the fiber material finally passes into the interior of the spinning unit and there into the region of the inlet mouth of a spindle-shaped yarn formation element.
• the outer fibers of the strand-like fiber material are wound around the inner fibers with the aid of the vortex air flow generated by the air nozzles in the region of the inlet mouth, so that a stable yarn is produced as a result, which finally with the help of a remote from the spinning unit exhaust device via the outlet channel from the vortex chamber withdrawn and wound by means of winding device on a sleeve.
• the spinning machine according to the invention can also be designed as a so-called rotor spinning machine sufficiently described in the prior art, whose principle is that the fibers of a likewise strand-shaped fiber material by means of a resolving device (usually in the form of an opening roller) isolated and the rapidly rotating rotor of the spinning unit to be supplied. Due to the rotor speed, the individual fibers abut the inner wall of the rotor and are twisted into one another. The twisted fibers can finally be drawn off via an outlet of the spinning unit and wound onto a sleeve of a downstream winding device.
• a resolving device usually in the form of an opening roller
• a corresponding rotor spinning machine for example, in the DE 101 37 056 A1 described, among other things, is provided, the track or the standby position of a service robot depending on various factors that affect the individual spinning stations set.
• a comparable strategy is also in the DE 31 35 333 A1 , but there in connection with a ring spinning machine, described.
• the yarn production must start the corresponding spinning station (s) are interrupted. This is done, for example, by stopping the unit supplying the fiber material to the spinning unit (eg, the drafting system of an air-spinning machine) and / or the spinning unit itself, if the yarn production is to be restarted after stopping the yarn production and, in particular, after removing the defective yarn section so is on the previously stopped Spinning a piecing process necessary.
• the unit supplying the fiber material to the spinning unit eg, the drafting system of an air-spinning machine
• the spinning unit eg, the drafting system of an air-spinning machine
• the end of the yarn already produced ie the end section of the last yarn section wound before the interruption of the yarn production
• the end of the yarn already produced is turned into or through the outlet of the spinning unit, contrary to the actual spinning direction and possibly after one or more intermediate steps (eg a yarn end preparation) these returned.
• the yarn end is brought into contact with the fiber material supplied to the spinning unit or the correspondingly supplied individual fibers and withdrawn from the spinning unit in the spinning direction.
• the normal spinning operation is finally resumed, in which a yarn is produced from the fiber material fed to the spinning unit.
• the object of the present invention is therefore to improve the piecing process described in such a way that the efficiency of the spinning machine is improved.
• the yarn leaving the spinning units of the individual spinning stations is monitored during the spinning operation of the respective spinning stations with the aid of yarn monitoring units assigned to the individual spinning stations (eg sensors visually or capacitively monitoring the yarn).
• the monitored yarn parameters may, for example, be the thickness or the hairiness of the yarn and / or the time change of corresponding yarn parameters. If one or more yarn parameters deviate or deviate from a predetermined target, or if specified limits are exceeded, the yarn production at the corresponding spinning station is interrupted. Likewise, it may be necessary to interrupt yarn production at one or more spinning stations for maintenance or repair purposes. After all these predefined events, it is necessary to re-spin the previously stopped spinning station to continue the yarn production.
• the present invention is characterized in that the individual spinning stations are classified on the basis of one or more production-related characteristics, ie are qualitatively evaluated, and that when more piecing operations occur at the same time are to be performed, as can be performed by the responsible for piecing handling means (service robots and / or spinning-own piecing, such as suction or blowing nozzles), at least the selection of the spinning station to be started next taking into account the classification mentioned.
• the responsible for piecing handling means service robots and / or spinning-own piecing, such as suction or blowing nozzles
• the order of the spinning stations to be started one after the other does not depend, or at least not exclusively, on the order in which the yarn production at the corresponding spinning stations was previously stopped. Rather, in the chronological order in which the spinning stations are spun, specific individual positions determined or defined by the spinning station are taken into account.
• the parameters are, as will be explained in more detail below, variables that are determined individually for each spinning station and with the aid of which the individual spinning stations can be characterized with regard to their yarn production and / or piecing behavior. If now the parameters are taken into account in the selection of the spinning station to be started next, then the time required in total for piecing the spinning stations of the spinning machine per operating hour can be minimized or the overall efficiency of the spinning machine can be increased.
• the order of successively spun spinning stations therefore deviates, at least in part, from the order in which yarn production at the respective spinning stations was previously stopped.
• the selection of the spinning unit to be started next takes place without consideration of the classification mentioned.
• the individual spinning stations can be spun, for example, in the chronological order in which the yarn production at the corresponding spinning stations was previously stopped.
• the chronological order of successively Spinning positions to be spun depend, among other things, on whether more spinning stations are to be spun at a certain time than can be spun by the handling means provided for this purpose.
• the parameters mentioned below can be considered as characteristic quantities, with one or more of the parameters being able to be taken into account in the definition of the spinning stations to be started one after the other.
• the sequence is preferably determined by a control unit of the spinning machine or a control unit in operative connection with the latter, wherein in the determination the corresponding parameter (s) is or are taken into account, ie. H. preferably flows into a corresponding deposited mathematical model or incorporated.
• the parameters can thus directly influence the order of the spinning stations to be started.
• the corresponding parameters should be determined separately for each spinning station in order to be able to carry out a correspondingly individual classification of the spinning stations.
• spinning stations are temporarily blocked for the piecing process, in which one or more parameters lie outside defined limits.
• the suspension can be canceled, for example, after a predetermined period of time or manually.
• the blocking of individual spinning stations can be carried out manually or automatically with the aid of the control unit, wherein in the case of an automatic blocking a message can be output to an operator of the spinning machine (eg in the form of an optical signal).
• an operator of the spinning machine eg in the form of an optical signal.
• a size for evaluating the total efficiency would be, for example, the amount of yarn or yarn length averaged over the unrestricted spinning stations, which is produced per unit of time. Decreases the Intelsez bin the spinning machine over time, so single or more spinning stations could be locked for the piecing. If the efficiency increases over time, individual or all previously locked spinning stations could be released again for the piecing process.
• the spinning stations temporarily not spun according to the previous description are re-spun, if the number of piecing operations currently carried out or piecing operations requested by the individual spinning stations reaches or falls below a defined value.
• a value X eg 5
• X + 2 the number of spinning stations to be spun at a certain point in time is, for example, X + 2
• two spinning stations for the piecing process would temporarily be blocked. If the number drops back to a value below the specified value X due to successful piecing processes, additional spinning units that were previously blocked can be spun.
• piecing operations are carried out at least partially, preferably exclusively, by means of spinning-own handling means.
• spinning-own handling means include, for example, suction or blowing nozzles or mechanically acting means, such as gripping elements or pairs of rollers with which the yarn can be guided or transported.
• a service unit (so-called service robot) movable between individual spinning stations is involved in carrying out the piecing operations or if the piecing operations are carried out exclusively with the aid of corresponding service units, the movement of the service unit taking into account the said classification takes place (of course also several service units can be used).
• the service unit (s) is not or not always moved to the spinning station that is to be started, which is the least far away from the service unit. Rather, one or more of the above-mentioned characteristics of the spinning stations to be spinning are taken into account so that the service unit (s) at least partially also spin-start spinning stations which are farther away than other spinning stations to be spun.
• the classification of the individual spinning stations regularly, d. H. at predetermined intervals, takes place.
• the classification is continuous. This ensures, for example, that the spinning stations are always preferably spun, which have a particularly high production rate or a particularly reliable piecing behavior. Since the amounts of the monitored parameters can change, the piecing priority of the individual spinning stations (that is, which spinning station is preferably spun in relation to another) can also change constantly.
• the invention relates to a spinning machine having the above-mentioned physical features, wherein the spinning machine has a control unit or is operatively connected to a control unit which is designed to operate the spinning machine according to the aspects described so far (the aspects realized individually or in any combination can be).
• the spinning machine also has sensors that can be used to determine the parameters taken into account during piecing.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Textile Engineering (AREA)
• Spinning Or Twisting Of Yarns (AREA)

Applications Claiming Priority (1)

Publications (2)

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• 2015
  • 2015-07-08 DE DE102015110992.1A patent/DE102015110992A1/de not_active Withdrawn
• 2016
  • 2016-06-28 JP JP2016127628A patent/JP2017025465A/ja active Pending
  • 2016-07-06 EP EP16178071.3A patent/EP3115487B1/de active Active
  • 2016-07-07 CN CN201610531442.8A patent/CN106337219B/zh active Active
  • 2016-07-07 US US15/203,963 patent/US10351976B2/en active Active

Non-Patent Citations (1)

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