EP0176809B1 - 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

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Publication number
EP0176809B1
EP0176809B1 EP85111350A EP85111350A EP0176809B1 EP 0176809 B1 EP0176809 B1 EP 0176809B1 EP 85111350 A EP85111350 A EP 85111350A EP 85111350 A EP85111350 A EP 85111350A EP 0176809 B1 EP0176809 B1 EP 0176809B1
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EP
European Patent Office
Prior art keywords
circular knitting
knitting machine
needle
machine according
roller
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.)
Expired
Application number
EP85111350A
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German (de)
English (en)
Other versions
EP0176809A1 (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
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Sulzer Morat GmbH
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Sulzer Morat GmbH
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Priority to AT85111350T priority Critical patent/ATE40422T1/de
Publication of EP0176809A1 publication Critical patent/EP0176809A1/fr
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Publication of EP0176809B1 publication Critical patent/EP0176809B1/fr
Expired legal-status Critical Current

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    • 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 always driven at the same high speed regardless of the needle cylinder speeds.
  • 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 spots seems z. B. 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 together with these remain in the combing zone for the duration of the standstill. Since these tufts of fibers lie in open needle hooks, their density could be both increased and decreased unintentionally, which is effectively avoided by the protective device according to the invention. 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 avoid a number of the thick and thin places that can be observed in the absence of the protective device.
  • 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 at least in the area a knitting system can be moved up and down with the aid of stationary loop parts 5a and 5b in order to produce a basic knitting with threads, not shown.
  • 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, for example consisting of two feed rollers 7a and 7b for a sliver or a fiber sliver 8, one for dissolving the Fiber sliver 8 has individual opening rollers 10 in individual fibers 9 and a combing zone 11 which is traversed by the knitting needles 3 or their hooks 4 for the purpose of accommodating the fibers 9.
  • a feed device for example consisting of two feed rollers 7a and 7b for a sliver or a fiber sliver 8
  • one for dissolving the Fiber sliver 8 has individual opening rollers 10 in individual fibers 9 and a combing zone 11 which is traversed by the knitting needles 3 or their hooks 4 for the purpose of accommodating the fibers 9.
  • the opening roller 10 which is rotatable 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 the Combing zone 11 surrounding closed housing 20, is opposite the outer circumferential surface of the opening roller 10 and an inlet opening 16 for the 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 to discharge the fibers 9 to the combing zone 11 contains.
  • the cover 15 initially delimits a dissolving and accelerating section 18, which begins directly at the inlet opening 16 and is indicated by an arrow, within which the cover 15 has a small but otherwise constant distance of, for example, less than one millimeter from the tips of the Has scratching hook 14 of the opening roller 10 so that the fibers 9 cannot detach from the scratching hook 14.
  • the opening and acceleration section 18 is then followed in the direction of rotation of the opening roller 10 by a separation section 19, indicated by an arrow, which ends at the outlet opening 17 and is at a distance from the tips of the scraper hooks 14, which gradually increases in the direction of rotation to a value of for example, increases several millimeters.
  • the faders 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 scraper hooks 14 .
  • the opening roller 10 is assigned a drive independent of the conventional 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, is provided, which is connected on the one hand via a gear 35 to the ring gear of the needle cylinder 2 and on the other hand via further gears 36, a shaft 37 and a belt drive 38 to an input of a differential gear 39 is.
  • 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 is fastened, which is connected via a belt 43 to a pulley 44, on the shaft of which a worm 45 is also fastened.
  • 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 gears 35, 36 and 38 and corresponds to the speed that is synchronous with the needle cylinder speed, since the two input speeds depend on the differential gear 39 Direction of rotation of the servo motor 41 can be summed or subtracted.
  • 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 is traversed by the tips of the scratching hooks 14 (DE-OS-3 212 580).
  • an ejection flap 50 is provided behind the fiber guide plate 47, which is pivotably articulated on the fiber guide plate 47 by means of a pivot pin 51 and is preferably 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 being 47, 50 and 52 expediently extend 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, for. B. consists of a solenoid with a retractable and extendable, articulated to the tab 53 plunger 54.
  • This switching element 55 is arranged on the side next to the opening roller 10 and in turn is pivotably articulated on a stationary machine part by means of a pivot pin 56. In the non-working position, e.g. B.
  • the fiber guide plate 47 and the closed ejector flap 50 form a substantially continuous fiber guide surface on their sides facing the scraper hook 14 (FIG. 2), which prevents fibers from being thrown out of the scraper hook 14 and combing out and orienting the fiber tufts 57 already inserted into the needles but still in the combing zone 11. If, on the other hand, the plunger 54 is extended from the solenoid 55 by supplying an electrical signal to it, 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.
  • a cover element 60 for the needle hooks 4 located in the combing-in 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 member 60 contains a thin, e.g. B. 0.15 mm thick cover plate, which preferably extends at least over the width of the opening roller 10 and is slidably guided in a slot guide 61 which is mounted in a wall part 62 surrounding the opening roller 10 (Fig. 2 to 4).
  • the slot guide 61 runs from an outlet end 63 of the wall part 62 lying in front of the combing zone 11 in the direction of rotation of the opening roller 10, essentially tangentially to the opening roller 10 and in the direction of a gap 64, which is on the one hand from the upper ends of the needle hooks 4 raised for fiber reception and on the other hand from the Cylinder surface 48 is limited and its width is slightly larger than the thickness of the cover element 60.
  • the protruding from the outlet end 63 of the cover member 60 is hinged to one end of a pivot arm 65 which is pivotally mounted at 66 in a central part and is hinged at its other end to a switching element 68 which z. B.
  • the cover element 60 consists of a solenoid with a hinged to the pivot arm 65 plunger 67 and in turn is pivotally mounted on a stationary part 69 of the machine.
  • 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 . In this working position, 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.
  • the cover element 60 penetrates 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 implement the desired displacement path for the cover element 60.
  • 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 for the servomotor 41z has an input connected to the power supply 71 and an output connected to the servomotor 41. 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 to an open position by means of a switching element 80, while the switch 79 can be brought from its normal open position to a by means of a switching element 81 Can be brought into the closed position.
  • 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 serve to control the control unit 72 z. B.
  • 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.
  • This 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 the 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 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 via a resistor 96, 97 to the input of a further amplifier 98.
  • 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 required, 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 of which 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. B. by relay controlled reed contacts exist.
  • the switch pairs 82, 84 and 86, 88 which can be actuated together in each case, can first be set so that the servo motor 41 for forward or Reverse rotation is operated at a speed matched to the type of fiber.
  • the speeds required in each case are to be determined in previous tests with the fibers to be used in each case and, if necessary, can be recorded in tables. Experiments have shown that for most practical cases three 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 can be set to the duration desired in the individual case.
  • 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 long period of time that it provides a sufficiently long pre-charge by the fiber for all types of fibers that occur Servomotor 41 allows.
  • 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:
  • the motor 33 of the opening roller 10 and the power supply 71 are first switched on in order to supply the control device with current. It can be sorted by a lock, not shown, that an actuation of the start switch 75 is only possible when the opening roller 10 has reached its nominal speed. During this time, 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 assume the positions shown in FIG. 5. The result of this is that the opening roller 10 partially scrapes out the fiber beard of the supplied fuse 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 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 which is referred to as the feeding of the fibers and is intended to avoid thin starting points, also takes place when the needle cylinder is at a standstill and continues until the timer 89 emits a control signal. When this control signal appears, the fiber beard or the fiber layer on the opening roller 10 is again built up to the extent required for the subsequent knitting process.
  • the control signal of the timing element 89 switches on the motor 34 for the needle cylinder 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 servo motor 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 106 outputs its control signal is there It is advisable to choose such that as few needles as possible enter the combing zone when the needle cylinder starts up before the cover element 60 is withdrawn, in order to avoid that no fibers are inserted into several adjacent needles.
  • 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 is done in that the comparator 100 when reaching a preselected voltage of the tachometer generator 91, the z. B. corresponds to the voltage a in block 108, outputs an output signal 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.
  • 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.
  • the switching element 104 is supplied with a control signal, which 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 in accordance with the existing friction conditions, while the opening roller 10 continues to run at unchanged speed, so that fibers are inserted into all the needles passing through the combing zone 11 until the needle cylinder is at a standstill. 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 return to the positions shown in FIG. 5.
  • 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 on one end facing the needles 3, which cover plate is pivoted into a gap 109 (FIG. 3) by pivoting the cover flap. 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 a sufficiently wide air intake gap could be formed between the cover element 60 in the working position and the associated end of the fiber guide plate, which would improve the air flow required for fiber ejection.
  • the solenoids 55, 56 other switching elements, for. B. hydraulic or pneumatic cylinder / piston arrangements.
  • 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 the fibers that came into the scraping hook 14 of the opening roller 10 when the needle cylinder was at a standstill would be removed through the ejection opening before they reach the combing 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.
  • a temporary interruption of the synchronicity can also be brought about by the fact that the distance of the feed device, for. B. the two feed rollers 7 to the opening roller 10 or the speed of the opening roller 10 is changed because the synchronism between fiber feed leading to the opening roller and fiber delivery to the combing zone leading to the target fiber density is also influenced by these measures.
  • 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.
  • 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.
  • Multi-system circular knitting machines can be assigned the described card 6 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.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Claims (12)

1. Métier à tricoter circulaire pour la fabrication de tricots avec des fibres introduites par peignage, comprenant une fonture cylindrique rotative qui présente des aiguilles à crochet, un mécanisme d'entraînement pour la fonture cylindrique et une carde, laquelle comporte un ! dispositif d'amenée pour les fibres, une zone d'introduction à peignage parcourue par les aiguilles en vue de recevoir les fibres sans contact et un cylindre démêleur tournant à vitesse élevée qui reprend les fibres du dispositif d'amenée et les délivre à la zone d'introduction à peignge, caractérisé en ce qu'il comporte un dispositif de protection entrant en action lors de l'arrêt de la fonture cylindrique (2) et destiné à conserver les faisceaux de fibres (57), déjà introduits par peignage, des aiguilles (3) qui lors de l'arrêt de la fonture cylindrique se trouvent dans la zone d'introduction à peignage (11).
2. Métier à tricoter circulaire selon la revendication 1, caractérisé en ce que le dispositif de protection comporte un élément de recouvrement (60) pouvant être amené dans une position de travail et une position de mise hors d'action et qui dans sa position de travail recouvre les crochets (4) des aiguilles placées dans la zone d'introduction à peignage (11) et évite ainsi l'engagement d'autres fibres dans ces crochets d'aiguilles (4).
3. Métier à tricoter circulaire selon la revendication 2, caractérisé en ce que l'élément de recouvrement (60) est une tôle de recouvrement déplaçable qui, en coulissant, peut être amenée dans la fente (64) entre le cylindre démêleur (10) et les crochets d'aiguilles (4).
4. Métier à tricoter circulaire selon la revendication 1, caractérisé en ce que le dispositif de protection comporte un élément de recouvrement (60) susceptible d'être amené dans une position de travail et une position de mise hors d'action et qui dans sa position de travail recouvre les faisceaux de fibres (57) se trouvant dans les crochets d'aiguilles (4) et empêche ainsi ces faisceaux de fibres d'en être dégagés lors de la rotation du cylindre démêleur (10).
5. Métier à tricoter circulaire selon la revendication 4, caractérisé en ce que l'élément de recouvrement (60) est une tôle de recouvrement montée de façon à pouvoir coulisser et qui peut être amenée par coulissement dans la fente entre le faisceau de fibres (57) engagé dans les crochets d'aiguilles (4) et le cylindre démêleur (10).
6. Métier à tricoter circulaire selon la revendication 3 ou 5, caractérisé en ce qu'il est prévu un élément de recouvrement commun (60) pour recouvrir les crochets d'aiguilles (4) et les faisceaux de fibres (57).
7. Métier à tricoter circulaire selon la revendication 6, caractérisé en ce que l'élément de recouvrement (60) est monté de façon à pouvoir coulisser dans un guide en forme de fente (61) d'une enveloppe (20) entourant le cylindre démêleur (10).
8. Métier à tricoter circulaire selon la revendication 1, caractérisé en ce que le dispositif de protection comporte un volet d'éjection (50) qui, susceptible d'être ouvert et fermé et destiné à évacuer des fibres excédentaires, fait partie d'une plaque guide- fibres (47) montée, dans le sens de rotation du cylindre démêleur (10), derrière la zone d'introduction à peignage (11).
9. Métier à tricoter circulaire selon la revendication 8, caractérisé en ce que le volet d'éjection (50) est fixé de façon à pouvoir basculer sur la plaque guide- fibres (47).
10. Métier à tricoter circulaire selon la revendication 1, caractérisé en ce que le dispositif de protection présente des organes de manoeuvre (55, 68) susceptibles d'être commandés électriquement.
11. Métier à tricoter circulaire selon la revendication 1 ou 10, caractérisé en ce qu'au dispositif de protection est associé un dispositif de commande au moyen duquel le dispositif de protection est respectivement mis en action ou hors d'action peu avant et après un arrêt de la fonture cylindrique.
12. Métier à tricoter circulaire selon la revendication 1, caractérisé en ce que le dispositif de commande comporte un organe indicateur (91) qui, associé au mécanisme d'entraînement (34) de la fonture cylindrique (2), présente une sortie à laquelle apparaît un signal de sortie proportionnel à la vitesse de rotation de la fonture cylindrique et en ce que la sortie est reliée à l'entrée d'au moins un comparateur (106, 107) dont la sortie délivre un signal de commande pour les organes de manoeuvre (55, 68) lorsqu'une valeur présélectionnée du signal de sortie est atteinte.
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
DE19843433643 DE3433643A1 (de) 1984-09-13 1984-09-13 Verfahren und rundstrickmaschine zur herstellung von strickwaren mit eingekaemmten fasern
DE3433643 1984-09-13

Publications (2)

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

Family Cites Families (7)

* 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
IL63972A (en) * 1980-10-11 1985-03-31 Sulzer Morat Gmbh Circular knitting machine
DE3039576A1 (de) * 1980-10-20 1982-05-19 Sulzer Morat Gmbh, 7024 Filderstadt Rundstrickmaschine zur herstellung von strickwaren mit eingekaemmten fasern
DE3212580A1 (de) * 1982-04-03 1983-10-13 Sulzer Morat Gmbh, 7024 Filderstadt Rundstrick- oder rundwirkmaschine zur herstellung von strick- oder wirkwaren mit eingekaemmten fasern
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

Also Published As

Publication number Publication date
JPS61124656A (ja) 1986-06-12
DE3433643C2 (fr) 1993-01-21
DD237686A5 (de) 1986-07-23
DE3433643A1 (de) 1986-03-20
EP0176809A1 (fr) 1986-04-09
US4765156A (en) 1988-08-23
ATE40422T1 (de) 1989-02-15

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