EP0176809A1 - Métier à tricoter circulaire pour la fabrication d'articles tricotés à poils longs - Google Patents

Métier à tricoter circulaire pour la fabrication d'articles tricotés à poils longs Download PDF

Info

Publication number
EP0176809A1
EP0176809A1 EP85111350A EP85111350A EP0176809A1 EP 0176809 A1 EP0176809 A1 EP 0176809A1 EP 85111350 A EP85111350 A EP 85111350A EP 85111350 A EP85111350 A EP 85111350A EP 0176809 A1 EP0176809 A1 EP 0176809A1
Authority
EP
European Patent Office
Prior art keywords
circular knitting
knitting machine
fibers
needle
needle cylinder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP85111350A
Other languages
German (de)
English (en)
Other versions
EP0176809B1 (fr
Inventor
Peter Dr.-Ing. Artzt
Gerhard Prof. Dr.-Ing. Egbers
Helmut Grimm
Klaus Kunde
Adolf Ing. Seidel (Grad.)
Helmut Hascher
Wolfgang Dipl.-Ing. Kolb (Fh)
Erwin Schäberle
Peter Wachsmuth
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sulzer Morat GmbH
Original Assignee
Sulzer Morat GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sulzer Morat GmbH filed Critical Sulzer Morat GmbH
Priority to AT85111350T priority Critical patent/ATE40422T1/de
Publication of EP0176809A1 publication Critical patent/EP0176809A1/fr
Application granted granted Critical
Publication of EP0176809B1 publication Critical patent/EP0176809B1/fr
Expired legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B9/00—Circular knitting machines with independently-movable needles
    • D04B9/14—Circular knitting machines with independently-movable needles with provision for incorporating loose fibres, e.g. in high-pile fabrics

Definitions

  • the invention relates to a circular knitting machine of the type defined in claim 1.
  • the amount of fiber supplied to the combing zone is changed synchronously when the needle cylinder speed changes, in order to convey fewer or more fibers into the combing zone as the needle cylinder speed decreases or increases, thereby ensuring that the preselected target fiber density at any speed of the needle cylinder, i.e. is achieved in particular when carrying out start and stop cycles.
  • synchronous conditions mean that the feed rollers and the needle cylinder are driven by a single main drive via gear wheels, belts, rollers or the like, so that the ratio of their speeds at all speeds of the needle cylinder is the same, and that the opening roller is
  • thick and thin places are those places in the finished knitted fabric where the fiber density is smaller or larger than the preselected target fiber density.
  • the length of the thin or thick points seems e.g. to be dependent on the downtime of the needle cylinder, the fiber length or the titer of the fibers.
  • the invention is therefore based on the object to improve the circular knitting machine of the type mentioned in such a way that thick and thin places are largely avoided. In particular, those thick and thin places that are observed after the needle cylinder has come to a standstill should be avoided.
  • the invention has the advantage that, when the needle cylinder is at a standstill, those tufts of fibers which have already been inserted into needles are retained, but remain together with these during the standstill in the combing zone. Since these tufts of fibers lie in open needle hooks, their density could be increased or decreased unintentionally, which is caused by the protection device according to the invention is effectively avoided. Maintaining the tufts of fibers is understood according to the invention that during the idle times of the needle cylinder, no fibers are additionally added to or removed from the needles arranged in the combing zone. This makes it possible to largely cover a number of the thick and thin places that can be observed in the absence of the protective device. to avoid.
  • a circular knitting machine for producing high-pile knitwear 1 contains a rotatable needle cylinder 2, in which vertically displaceable knitting needles 3 with hooks 4 are mounted, which are in the area at least one knitting system with the help of stationary lock parts 5a and 5b can be moved up and down in order to threads not shown-to produce a basic knitted fabric.
  • the fibers are dissolved and combed into the knitted fabric with the aid of at least one card 6 assigned to the knitting system, which is a feed device consisting, for example, of two feed rollers 7 and 7b for a sliver or a fiber sliver 8, one for dissolving the fiber sliver 8 into individual fibers 9 certain opening roller 10 and a combing zone 11 through which the knitting needles 3 or their hooks 4 pass for the purpose of receiving the fibers 9.
  • the knitting system which is a feed device consisting, for example, of two feed rollers 7 and 7b for a sliver or a fiber sliver 8, one for dissolving the fiber sliver 8 into individual fibers 9 certain opening roller 10 and a combing zone 11 through which the knitting needles 3 or their hooks 4 pass for the purpose of receiving the fibers 9.
  • the opening roller 10 which can be rotated in the direction of an arrow P, is covered on its circumferential or circumferential surface with a fitting 13 which has scraping hooks 14 projecting outwards.
  • the opening roller 10 is driven at a peripheral speed which is substantially greater than the peripheral speed of the feed rollers 7 and therefore breaks down the fiber sliver 8 into the individual fibers 9.
  • the card 6 has a cover 15, which is preferably a part of the opening roller 10 and is the closed housing 20 surrounding the combing zone 11, opposite the outer lateral surface of the opening roller 10 and an inlet opening 16 for the fiber sliver 8 fed by the feed rollers 7 and an outlet opening 17 arranged behind it in the direction of rotation of the opening roller and opening into the combing zone 11 for discharging the fibers 9 to the combing zone 11 contains.
  • the cover 15 initially delimits an opening and acceleration section 18, which is indicated by an arrow, beginning directly at the inlet opening 16, within which the cover 15 has a small but otherwise constant distance of, for example, less than one millimeter has the tips of the scraper hook 14 of the opening roller 10 so that the fibers 9 cannot detach from the scraper hook 14.
  • the opening and accelerating section 18 is then followed in the direction of rotation by the opening roller 10 by a separating section 19, indicated by an arrow, which ends at the outlet opening 17 and is at a distance from the tips of the scratching hooks 14, which gradually increases in the direction of rotation to a value of for example, increases several millimeters.
  • the fibers 9 in this detachment section 19 can be detached by the centrifugal force, entrained tangentially in the air flow resulting from the rotation of the opening roller and combed in the combing zone 11 into the knitting needles raised by means of the lock parts 5, without these coming into contact with the scraping hooks 14 .
  • the opening roller 10 is associated with a drive independent of the usual needle cylinder drive in the form of a motor 33, which drives the opening roller 10 at a constant speed at all knitting machine speeds or can be adapted to a certain extent to the respective knitting machine speeds and / or the properties of the supplied fibers.
  • the motor 33 can also be a pole-changing motor with at least two speed levels.
  • a drive device 34 for example a motor, which is connected on the one hand via a toothed wheel 35 to the ring gear of the needle cylinder 2 and on the other hand via further toothed wheels 36, a shaft 37 and a belt drive 38 to an input of a differential gear 39.
  • Another input of this differential gear 39 is connected to the output shaft of a servo motor 41 via a further belt drive 40.
  • a pulley 42 On the output shaft of the Diffe rentialgetriebes 39 a pulley 42 is attached, which is connected via a belt 43 to a pulley 44, on the shaft of which a worm 45 is also attached.
  • This worm 45 is connected in the usual way to a worm wheel which sits on one of the shafts of the feed rollers 7 and serves to drive it. Because of the drive described, it is possible to drive the feed rollers 7 either synchronously with the needle cylinder when the servo motor 41 is at a standstill or with the speed of the servo motor 41 when the motor 34 is at a standstill or when both motors 34, 41 are switched on at a superimposed speed.
  • the feed rollers can optionally be driven at a higher or lower speed than the speed that can be produced via the gearwheels 35, 36 and 38 and corresponds to the speed that is synchronous with the needle cylinder speed, since the two input speeds of the differential gear 39 each can be summed or subtracted according to the direction of rotation of the servo motor 41.
  • the differential gear thus represents a means of interrupting and restoring synchronism between the feed device and the needle cylinder.
  • the housing 20 has a fixed fiber guide plate 47 in the region bordering the needle back, the end of which faces the combing zone 11 is formed in a streamlined manner.
  • the fiber guide plate 47 is arranged in such a way that a wedge gap 49 is formed behind the needles 3, between it and an imaginary cylinder surface 48 which has been traversed by the tips of the scraping hooks 14 (DE 7 OS 32 12 580).
  • the opening roller 10 is behind in the direction of rotation the fiber guide plate 47 is provided with an ejection flap 50 which is pivotably articulated on the fiber guide plate 47 by means of a pivot pin 51 and is preferably a part of the latter.
  • the other end of the ejection flap 50 borders along a sloping butt joint on a stationary housing part 52, the components 47, 50 and 52 expediently extending at least across the width of the opening roller.
  • the ejection flap 50 has a tab 53, which is connected to a switching element 55, which consists, for example, of a lifting magnet with a retractable and extendable plunger 54 articulated on the tab 53.
  • This switching element 55 is arranged laterally next to the opening roller 10 and in turn articulated by means of a pivot pin 56 on a stationary machine part.
  • the fiber guide plate 47 and the closed ejection flap 50 form an essentially continuous fiber guide surface on their sides facing the scraper hook 14 (FIG.
  • the disturbing lever 54 is extended by supplying an electrical signal to the lifting magnet 55, the rear end of the ejection flap 50 is pivoted radially away from the opening roller 10 into the working position in the manner shown in FIG. 3. This creates an ejection opening 58 which is almost tangential to the circumferential surface of the opening roller 10, in which fibers still located in the hooks 14 are detached due to the centrifugal forces and are then sucked off, for example, by a central suction device.
  • a cover element 60 for the needle hooks 4 located in the combing zone 11 is arranged according to the invention, which serves to cover the open needle hooks 4 if necessary so that they can no longer accommodate fibers.
  • the cover element 60 contains a thin, for example 0.15 mm thick cover plate, which preferably extends at least over the width of the opening roller 10 and is guided in a slot guide 61, which is located in a wall part surrounding the opening roller 10 62 (Fig. 2 to 4) is attached.
  • the slot guide 61 runs from a in the direction of rotation of the opening roller 10 before the
  • the combing zone 11 of the outlet end 63 of the wall part 62 is essentially tangential to the opening roller 10 and in the direction of a gap 64 which is delimited on the one hand by the upper ends of the needle hooks 4 raised for fiber reception and on the other hand by the cylinder surface 48 and whose width is somewhat larger than the thickness of the Cover member 60 is.
  • the end of the cover element 60 protruding from the outlet end 63 is articulated to one end of a swivel arm 65 which is pivotably mounted in a central part at 66 and is articulated at its other end to a switching element 68 which, for example, consists of a solenoid with one of the Swivel arm 65 is articulated plunger 67 and in turn is pivotally mounted on a stationary part 69 of the machine.
  • a control signal to the switching element 68 By supplying a control signal to the switching element 68, the cover element 60 can therefore either be pivoted into the out-of-work position shown in FIG. 2, in which it releases the gap 64 and is retracted far into the slot guides 61, or can be advanced into a working position according to FIG. 3 .
  • the end of the cover element 60 assigned to the needles 3 projects through both the gap 64 and the wedge gap 49 following in the direction of rotation of the opening roller 10. Because the cover element 60 projects through the gap 64, the open needle hooks 4 are covered in such a way that before the combing zone 11 fibers detached from the scraping hooks 14 cannot be combed into the needle hooks 4. Because the cover plate protrudes into the wedge gap 49, on the other hand, the tufts of fibers combed into the needle hooks 4 are protected from the scratching hooks 14 irrespective of the fiber length selected in the individual case and can therefore not be gripped by them and pulled out unintentionally.
  • the cover element 60 is thus part of a protective device for maintaining the combed-in fiber tufts 57 of the needles 3 arranged in the combing-in zone.
  • the section covering the needle hooks 4 and the section of the cover element 60 covering the fiber tufts 57 could also be separated from one another and connected to different switching elements. 2 and 3, the swivel arm 65 is shown exaggeratedly short and in fact approximately as long as is necessary to pearlize the desired displacement path for the cover element 6n
  • FIG. 5 shows a control device for the circular knitting machine described with reference to FIGS. 1 to 4. It contains a power supply unit 71, which supplies all electronic or electromagnetic components, in particular a control unit 72 for the servo motor 41 and a control unit 73 for the drive device 34 of the circular knitting machine, and is also connected to a main switch 74.
  • the control device 72 has for the servo motor 41 'a device connected to the network 71 and an input connected to the servo motor 41 output. Another input is connected to a start switch 75, a switch 76 being connected in the connecting line to the latter, which switch can be brought from its normal closed position into an open position by means of a switching element 77.
  • Another input of the control device 72 is connected to two switches 78 and 79 which are connected in series.
  • the switch 78 can be brought from its normal closed position into an open position by means of a switching element 80, while the switch 79 can be brought from its normal open position into a closed position by means of a switching element 81.
  • Another input of the control device 72 is connected to the movable contact of a switch 82, which can be switched over to three fixed contacts, each of which is connected to a potentiometer 83.
  • the other connections of this potentiometer 83 are connected to three fixed contacts of a further switch 84, which also has a movable contact which can be switched over to the three fixed contacts.
  • the switches 82, 84 and the potentiometers 83 form a preselection circuit and are used to specify the control device 72, for example, three individually selectable speeds for the rotation of the servo motor 41 in the forward direction.
  • Another input of the control unit 72 is finally connected via a line 85 to the movable contact of a switch 86, the three fixed contacts of which are connected via potentiometer 87 to three fixed contacts of a switch 88 such that, for example, three with the switches 86, 88 and the potentiometers 87 individually adjustable rotation pay for the servo motor 41 can be preselected when it rotates in the reverse direction.
  • the start switch 75 is connected to the fixed contact of a switch 90 via an adjustable timer 89.
  • the movable contact of this switch 90 is connected to the control device 73 for the motor 34 of the needle cylinder.
  • Motor 34 has a display element in the form of a tachometer generator 91, which in the usual way consists of a dynamo that outputs a voltage at its output that is proportional to the speed of motor 34.
  • the output of a setpoint generator 92 is connected to a further input of the control device 73.
  • the setpoint generator 92 contains a conventional amplifier 93, at the one input of which there is a potentiometer 94 and whose output is connected to the movable contact of a switch 95, the two fixed contacts of which are each connected to the input of a further amplifier 98 via a resistor 96, 97.
  • the output of the amplifier 98 which is also connected to its input via a capacitance 99, forms the output of the setpoint generator 92.
  • the output of the tachometer generator 91 is connected to the input of a comparator 100, to the output of which a switching element 101 is connected, which serves to move the movable Switch contact 95 switch from one to the other fixed contact of this switch.
  • the control device also contains a manually actuable stop switch 102 and, if necessary, at least one automatically triggerable stop switch 103, for example in the form of a switch which is customary in circular knitting machines and which is triggered in the event of thread breakage, needle breakage or the like. Both switches 102 and 103 are connected to a switching element 104, which serves to switch the normally closed switch 90 into an open position.
  • the switching element 81 is located at the output of a comparator 105, the
  • Input is connected to the output of the tachometer generator 91. Otherwise, the free connections of the switches 75, 84, 88, 102, 103 and the potentiometer 94 are connected to the power supply 71 or another suitable current or voltage source.
  • the control device has two further comparators 106 and 107.
  • the output of the comparator 106 is connected on the one hand to an input of the switching elements 55 and 68 and on the other hand to the switching element 77 for the switch 76, while the comparator 107 on the one hand to another input of the switching elements 55 and 68 and on the other hand to the switching element 80 for the switch 78 is connected.
  • the inputs of the comparators 106 and 107 are connected to the output of the tachometer generator 91.
  • the switches 76, 78, 79, 90 and 95 and the switching elements 77, 80, 81, 101 and 104 assigned to them can be made from purely electronic components, but also from electromechanical components, e.g. reed contacts controlled by relays.
  • the switch pairs 82, 84 and 86, 88 that can be actuated together can initially be so can be set that the servo motor 41 is operated with a speed matched to the type of fiber during forward or reverse rotation.
  • the speeds required in each case are to be determined in previous tests with the fibers to be used and can be recorded in tables if necessary. Experiments have shown that, for most practical cases, three under Different speeds are sufficient for both forward and reverse rotation and that these speeds can be assigned fiber lengths up to 25 mm, between 25 and 40 mm and 40 to 80 mm in length.
  • the potentiometers 83, 87 can be set once and only change the switch pairs 82.84 and 86.88 when changing the type of fiber.
  • the timer 89 are set to the desired duration in individual cases.
  • the timer 89 specifies how long the servomotor 41 should be switched on before the motor 34 of the knitting machine is switched on.
  • the setting can be determined depending on the type of fiber and recorded in tables. It would also be possible to provide a plurality of fixed time elements, each of which is assigned a fiber type. Expediently, however, the timing element 89 is set to such a large period of time that it enables the servo motor 41 to provide a sufficiently long feed for all types of fibers that occur.
  • the potentiometer 94 which is assigned to the setpoint generator 92, offers a further setting possibility.
  • the setpoint generator 92 on the one hand specifies the accelerations with which the rotational speed of the needle cylinder is to be increased during start-up, and on the other hand determines the maximum rotational speed, ie the production speed, which the needle cylinder is to achieve. This production speed can be set with the potentiometer 94.
  • the speed of the motor 33 for the opening roller 10 can be set using a further potentiometer, not shown, or a switch.
  • the described control device works as follows: By actuating the main switch 74, the motor 33 of the opening roller 10 and the power supply unit 71 are first switched on in order to supply the control device with current.
  • a lock not shown, that the actuation of the start switch 75 is only possible when the opening roller 10 has reached its nominal speed.
  • the cover element 60 and the ejection flap 50 are in the working position shown in FIG. 3, while the needle cylinder 2 is at a standstill and the various switches are in the positions shown in FIG. 5.
  • the consequence of this is that the opening roller 10 partially scrapes out the fiber beard of the supplied sliver 8 which projects into the effective area of the scraping hooks 14 in the area of the inlet opening 16 of the fibers.
  • the start switch 75 is actuated.
  • the servo motor 41 is switched on in the forward direction via the closed switch 76 and the control device 72, specifically at a speed dependent on the position of the switch pair 82, 84 and the potentiometer 83.
  • the result of this is that the feed rollers 7 are rotated and the fiber beard partially destroyed by the opening roller 10 is rebuilt in the region of the inlet opening 16.
  • a larger than the synchronous amount of fibers is fed to the combing-in zone 11, because when using conventional high-pile knitting machines, the feed rollers are at rest as long as the needle cylinder is at a standstill.
  • This process also takes place when the needle cylinder is at a standstill and continues until the timer 89 emits a control signal.
  • this control signal appears, the fiber beard or the fiber layer located on the opening roller 10 is again built up to the extent required for the subsequent knitting process.
  • the motor 34 for the needle cylinder is switched on via the switch 90 and the control device 73, preferably with a first, comparatively large acceleration accelerated by the setpoint generator 92.
  • This starting acceleration occurs when the movable contact of the switch 95 is connected to the resistor 97, which forms an RC element with the capacitance 99 and results in a voltage rise at the output of the amplifier 98 in accordance with the first section of a U / t curve , which is shown in a block 108 of the setpoint generator 92.
  • the needle cylinder thus begins to rotate and the tachometer generator 91 outputs a voltage which is proportional to the respective instantaneous speed of the motor 34 and which is supplied to the comparators 106 and 100 activated during the starting cycle. If this voltage reaches a relatively small value monitored by the comparator 106, then the comparator 106 outputs an output signal which is fed to the switching element 77, which then opens the switch 76 and thereby switches off the servomotor 41. At the same time, the output signal of the comparator 106 is supplied to the switching elements 55 and 68, as a result of which the ejection flap 50 and the cover element 60 are pivoted or shifted into the out-of-work position shown in FIG. 2.
  • the voltage at which the comparator outputs 106 may be the control signal, thereby to 'select appropriate so that possible shrinkage during start-up of the needle cylinder few needles in the combing-in zone, before the cover 60 is retracted in order to avoid that, in a plurality of adjacent needles no Fibers are inserted.
  • the voltage of the tachometer generator 91 can be chosen so small that at most one needle passes through the combing zone without picking up fibers.
  • the speed of rotation of the needle cylinder now increases with the acceleration predetermined by the setpoint generator 92. It may happen that slight starting thin spots occur in the knitted fabric, which are obviously due to the fact that the synchronous speed of the feed rollers 7 is not sufficient when accelerations are too great. In order to avoid such starting thin spots, a switch is made to a smaller acceleration when the needle cylinder speed is determined by tests. This takes place in that the comparator 100 emits an output signal when a preselected voltage of the tachometer generator 91 is reached, which corresponds, for example, to the voltage a in the block 108, and thereby switches the movable contact of the switch 95 via the switching element 101.
  • the needle cylinder is now accelerated with a second, smaller acceleration until it has reached its preset production speed and is kept at this speed by means of the control device 73.
  • the start cycle is now complete.
  • the lower speed is determined by the RC element formed from the resistor 96 and the capacitance 99. If the knitting machine is to be switched off, either the stop switch 102 is actuated or the stop switch 103 is triggered automatically.
  • the comparators 105 and 107 which are inactive during the start cycle, are activated and, at the same time, the two comparators 106 and 100, which are active during the start cycle, are made inactive via lines, not shown.
  • a control signal is sent to the switching element 104, whereby this opens the switch 90, thereby switching off the motor 34 and at the same time switching on a magnetic brake for the needle cylinder.
  • the needle cylinder is now braked according to the existing friction conditions, while the opening roller 10 continues to run at unchanged speed, so to. when the needle cylinder comes to a standstill, fibers are inserted into all the needles passing through the combing zone 11. Since the feed rollers 7 are also braked during the stop cycle, the wire hooks 14 of the opening roller 10 now tear more fibers out of the fiber beard projecting into the inlet opening 16 than is necessary to achieve a uniform knitted fabric. The resulting thickening of the outlet is avoided according to the invention in that, when a preselected speed of the needle cylinder is reached, the feed rollers are rotated more slowly than the synchronous speed in order to compensate for the excess supply of fibers caused by the opening roller.
  • the comparator 105 is set to a preselected voltage so that, when this voltage is reached, it outputs an output signal at the output of the tachometer generator 91, which closes the switch 79 via the switching element 81 and thereby switches on the servomotor 41 in the reverse direction, which switches on via the line 85 and the control unit 72 receives a speed which is preselected by the position of the switch pairs 86, 88 and the potentiometer 87.
  • the speed from which the servo motor 41 is to be switched on must be determined empirically. It can also result that the servo motor must be switched on when the switches 102, 103 are actuated, in which case the comparator 105 must be set to a value which is just below the production speed or can be switched directly by the switches 102, 103.
  • the comparator 107 emits an output signal shortly before the needle cylinder comes to a standstill, which is supplied to the switching elements 55, 68 on the one hand and, on the other hand, switches off the servomotor via the switching element 80 and the switch 78 thereby opened, so that when the needle cylinder is at a standstill the feed rollers also come to a standstill.
  • the supply of the output signal to the switching elements 55, 68 has the result that the ejection flap 50 and the cover element 60 are pivoted or pushed back into their working position shown in FIG.
  • the output voltage of the tachometer generator 91, at which the comparator 107 outputs its output signal, can be chosen to be so small that only one needle enters the combing zone 11 after the cover element has been pushed forward. Furthermore, the output signal of the comparator 107 ensures that all switches then assume the positions shown in FIG. 5 again.
  • cover element 60 instead of the cover element 60, it is possible to provide a cover flap which is pivotally suspended on the side walls of the cover 15 and carries a cover plate at one end facing the needles 3, which cover plate is pivoted into a gap 109 by pivoting the cover flap (Fig. 3 ) is inserted between the cover 15 and the front sides of the needles to cover their open hooks 4.
  • This cover flap could also be controlled by a solenoid.
  • a rigid, one-piece fiber guide plate which can be moved radially and possibly also in the circumferential direction of the opening roller 10 or a pivotable fiber guide plate which simultaneously forms the ejection flap can be provided.
  • Such a fiber guide plate would have the advantage that between the work in progress.
  • Position cover element 60 and the associated end of the fiber guide plate a sufficiently wide air intake gap could be formed, which would improve the air flow required for fiber ejection.
  • the ejection flap 50 can be arranged at a point lying in the direction of rotation of the opening roller 10 between the inlet opening 16 and the combing-in zone 11 and can optionally be connected to a suction device. This could avoid standing thick spots without the need for a covering device for the needles, because all fibers coming into the scraping hook 14 of the opening roller 10 when the needle cylinder is at a standstill would be removed through the ejection opening before they reach the combing-in zone 11. Furthermore, the swiveling ejection flap 50 can be replaced by a displaceable fiber guide plate, which offers advantages in particular with regard to access to the parts of the cardboard located behind the needles.
  • Proportional braking of the feed rollers 7 could also take place with the aid of a switchable clutch (DE-OS 21 15 721) in that this clutch is temporarily switched off or disengaged during the stop cycles in order to at least temporarily interrupt the synchronous running of the feed rollers.
  • a switchable clutch DE-OS 21 15 721
  • a temporary interruption of the synchronicity can also be brought about in that the distance between the feed device, e.g. of the two feed rollers 7, to the opening roller 10 or the speed of the opening roller 10 is changed because the synchronism between the fiber feed to the opening roller and the fiber delivery to the combing zone, which leads to the desired fiber density, is also influenced by these measures.
  • Those parts of the protective device which serve to avoid combing out tufts of fibers already in the needles can also be modified.
  • the opening roller could be stopped and restarted or at least slowed down at every stop and restart, and b) the flow conditions behind the combing zone could be set up so that the tufts of fibers cannot come into contact with the tips of the scraper hooks 14 when the needle cylinder is at a standstill, that c) when the needle cylinder is at a standstill, the distance between the opening roller and the needles and / or the fiber guide plate is increased could be that d) scraping hooks could be used which are drawn into the opening roller 10 when the needle cylinder is at a standstill, and that e) compressed or suction air could be generated by opening rollers or fiber guiding surfaces with sieve-like surfaces in order to keep the tufts of fibers away from the scraping hooks 14 .
  • control device described can also be used analogously when working in a crawl gear or for so-called tip operation, with the needle cylinder only being rotated briefly by a few needle spacings. In order to ensure this the preselected nominal fiber density, but may be necessary to reduce the speed of the opening roller or the feed rate of the fibers to the opening roller in addition to or in sync with the waste bremsvorgän g s maintain.
  • feed devices can be provided which have at least one feed roller and a fiber guide plate associated therewith (US Pat. No. 3,968,662).
  • the invention was finally described using the example of a single knitting system of a circular knitting machine.
  • the card 6 described can be assigned to each system. It is possible to drive several opening rollers each with a single motor.
  • the term circular knitting machine is also intended to include circular knitting machines.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
  • Preliminary Treatment Of Fibers (AREA)
EP85111350A 1984-09-13 1985-09-09 Métier à tricoter circulaire pour la fabrication d'articles tricotés à poils longs Expired EP0176809B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85111350T ATE40422T1 (de) 1984-09-13 1985-09-09 Rundstrickmaschine zur herstellung von strickwaren mit eingekaemmten fasern.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3433643 1984-09-13
DE19843433643 DE3433643A1 (de) 1984-09-13 1984-09-13 Verfahren und rundstrickmaschine zur herstellung von strickwaren mit eingekaemmten fasern

Publications (2)

Publication Number Publication Date
EP0176809A1 true EP0176809A1 (fr) 1986-04-09
EP0176809B1 EP0176809B1 (fr) 1989-01-25

Family

ID=6245322

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85111350A Expired EP0176809B1 (fr) 1984-09-13 1985-09-09 Métier à tricoter circulaire pour la fabrication d'articles tricotés à poils longs

Country Status (6)

Country Link
US (1) US4765156A (fr)
EP (1) EP0176809B1 (fr)
JP (1) JPS61124656A (fr)
AT (1) ATE40422T1 (fr)
DD (1) DD237686A5 (fr)
DE (1) DE3433643A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102286811A (zh) * 2011-07-14 2011-12-21 昆山牧丰纺织有限公司 絮状纤维喂入设备
CN102296387B (zh) * 2011-07-14 2017-06-06 昆山牧丰纺织有限公司 散流纤维聚集分配装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2085485A (en) * 1980-10-20 1982-04-28 Sulzer Morat Gmbh Circular knitting machine for producing knitted goods with combed-in fibres
EP0091025A2 (fr) * 1982-04-03 1983-10-12 Sulzer Morat GmbH Métier à tricoter circulaire pour la fabrication d'articles tricotés comportant des fibres insérées

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3709002A (en) * 1970-08-20 1973-01-09 Bunker Ramo Apparatus for producing patterned deep pile circular knitted fabrics
US3968662A (en) * 1973-08-31 1976-07-13 M. Lowenstein & Sons, Inc. Method of feeding fibers to a pile fabric circular knitting machine
DE3107714A1 (de) * 1980-10-11 1982-06-24 Sulzer Morat Gmbh, 7024 Filderstadt Strick- oder wirkmaschine zur herstellung von florware mit eingekaemmten fasern
US4458506A (en) * 1980-10-11 1984-07-10 Sulzer Morat Gmbh Circular knitting or circular hosiery knitting machine for manufacture of knit wares of hosiery with combed-in fibers
DE3478619D1 (en) * 1983-01-21 1989-07-13 Giovanni Cesare Fratini Device for hydraulic feeding of textile material to circular wildmann-type and similar machines, with direct hydraulic recycling of the rejected fibres, plus exclusion of the cards

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2085485A (en) * 1980-10-20 1982-04-28 Sulzer Morat Gmbh Circular knitting machine for producing knitted goods with combed-in fibres
EP0091025A2 (fr) * 1982-04-03 1983-10-12 Sulzer Morat GmbH Métier à tricoter circulaire pour la fabrication d'articles tricotés comportant des fibres insérées

Also Published As

Publication number Publication date
ATE40422T1 (de) 1989-02-15
US4765156A (en) 1988-08-23
DE3433643A1 (de) 1986-03-20
DE3433643C2 (fr) 1993-01-21
DD237686A5 (de) 1986-07-23
EP0176809B1 (fr) 1989-01-25
JPS61124656A (ja) 1986-06-12

Similar Documents

Publication Publication Date Title
DE2458042C2 (de) Offenend-Spinnmaschine mit einer Vielzahl von Spinnstellen und einem verfahrbaren Wartungsgerät zum Anspinnen nach einem Fadenbruch
DE2544209C2 (de) Verfahren zum Anspinnen einzelner Spinnaggregate einer eine Vielzahl von Spinnaggregaten aufweisenden OE-Spinnmaschine
DE2560526C2 (de) Florfaser-Zubringereinrichtung
DE2829314A1 (de) Verfahren und vorrichtung zum zufuehren eines glasfaserstranges auf eine zufuehrrolle
EP0368059A1 (fr) Machine de peignage(rattachage de nappe)
DE2507153C3 (de) Verfahren zum Anspinnen eines Fadens bei Offenend-Spinnaggregaten und Offenend-Spinnmaschine zum Durchführen des Verfahrens
DE2062768B2 (de) Offen-End-Spinnmaschine
DE2818794C2 (de) Verfahren und Vorrichtung zum Betreiben und Anspinnen einer OE-Spinnvorrichtung
DE2708936C2 (de) Verfahren und Vorrichtung zum Anspinnen eines Fadens an Spinnaggregaten einer Offenend-Spinnmaschine
DE2138487C3 (de) Vorrichtung zum Herstellen von Effektgarn mittels einer Offenend-Spinnvorrichtung
DE1193402B (de) Krempel
CH695866A5 (de) Vorrichtung zum Vernadeln eines förderbaren Faservlieses.
EP0176809B1 (fr) Métier à tricoter circulaire pour la fabrication d'articles tricotés à poils longs
EP0049857B1 (fr) Métier à tricoter circulaire pour fabriquer un tricot pelucheux ayant des fibres insérées
DE1510422C2 (de) Kämm-Maschine für langes Fasergut, beispielsweise Wolle
EP0177778B1 (fr) Procédé et métier à tricoter circulaire pour la fabrication d'articles tricotés à poil long
DE3205938C2 (fr)
DE3516120C2 (de) Verfahren zum automatischen Anspinnen und automatische Anspinnvorrichtung
EP0291710A1 (fr) Procédé et dispositif pour surveiller la partie rattachée du fil sur un métier à filer à bout libre
DE2417758C2 (de) Verfahren und Vorrichtung zum Steuern des Ganges einzelner Organe von Offenend-Spinnmaschinen für das Massenanspinnen
EP0091025B1 (fr) Métier à tricoter circulaire pour la fabrication d'articles tricotés comportant des fibres insérées
EP3739089B1 (fr) Dispositif d'alimentation d'une installation de formation du non-tissé
DE2802527C2 (fr)
EP3699334A1 (fr) Dispositif d'alimentation d'une installation de formation du non-tissé
DE2909253C2 (fr)

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT FR GB

17P Request for examination filed

Effective date: 19860919

17Q First examination report despatched

Effective date: 19871215

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT FR GB

REF Corresponds to:

Ref document number: 40422

Country of ref document: AT

Date of ref document: 19890215

Kind code of ref document: T

ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19890909

Ref country code: AT

Effective date: 19890909

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19900531

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST