Classifications

• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
  • D01G19/00—Combing machines
  • D01G19/06—Details
  • D01G19/14—Drawing-off and delivery apparatus
  • D01G19/16—Nipper mechanisms
• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
  • D01G19/00—Combing machines
  • D01G19/06—Details
  • D01G19/10—Construction, mounting, or operating features of combing elements

Definitions

• the invention relates to a combing device for combing a fiber material, which is fed to a stored in a Maschinengesteli nipper unit having a lower and upper nipper plate, wherein the upper nipper plate is movably mounted with respect to the lower nipper plate, to form a nip and for generating a clamping force is acted upon by a loading device and with a disposed within the nipper unit feeding means for feeding the fiber material to the nip of the nipper unit, which is assigned below a rotatably mounted in the machine frame Kämmzylinder which is provided on its circumference with at least one Kämmsegment and with a the tongs unit associated tear-off.
• the nipper unit consists of a reciprocating lower nipper plate, on which pivot arms an upper nipper plate is pivotally mounted
• Pivoting movement of the upper pliers plate results from the oscillating movement of the lower pliers plate, with closed pliers, the clamping force is generated in the region of the pliers lips of upper and lower pliers plate by spring loaded arms, which are hinged on one side to pivot arms of the upper pliers plate and on the other hand on an eccentric shaft, which in Machine frame is stored.
• spring loaded arms which are hinged on one side to pivot arms of the upper pliers plate and on the other hand on an eccentric shaft, which in Machine frame is stored.
• the use of a special tool is necessary to pivot the tong plate against the permanently acting spring force.
• combing numbers of up to 500 KS / min are achieved on the basis of the optimizations that have been carried out in the meantime.
• Example from GB-PS 474 456, wherein the control of the pivoting movement of the upper tong plate via an additionally mounted cam gear, which communicates with an output rod with the pivot levers of the upper pliers plate in connection.
• the demolition of the combed tuft takes place here with a tear-off, which together with a mounted on the circumference of the combing cylinder tear-off, which forms a nip with the withdrawal roller.
• the torn-off fiber packet is subsequently delivered to subsequent soldering rollers or soldering devices.
• Only the upper tong plate was moved, only limited Kammspielbread were feasible with the illustrated embodiment of the cam gear.
• a similar embodiment is known from DE-PS 218606, wherein the movement of the upper tong plate is also controlled by a separately mounted cam gear.
• the tearing of the tuft is done by a separately arranged pair of tearing rollers.
• the drive of a nipper unit is known, wherein the lower nipper plate performs a reciprocating motion, which is controlled by a roller which is guided on a cam (cam drive).
• the cam is mounted on the combing cylinder axis.
• the upper tong plate is taken over the reciprocating movement of the lower tong plate and is connected via a lever with another guide roller in connection, which is guided in an additional guide.
• the movement of the upper tong plate is dependent on the movement of the driven lower tong plate and has additional guide elements to a corresponding movement to create during a comb play.
• This device is not suitable to increase the usual today Kammspielbread, or production quantities significantly.
• the invention is therefore based on the object, the nipper unit of a combing machine form with his drive so that it is possible that the previously achieved Kammspielbread and thus the production quantities can be significantly increased. Furthermore, the oscillations and also the noise development in the region of the nipper unit should also be kept constant or even reduced at higher comb rates with the proposed load device. This object is achieved by proposing that the upper
• Pliers plate is provided with guide elements, which are guided for direct control of their movement on cams, which are rotatably mounted on the axis of rotation of the combing cylinder and the position of the lower pliers plate during a comb play - seen in the direction of Abreissstoffs - constant.
• the control of the movement of the upper tong plate is removed directly from the rotational movement of the combing cylinder, while the lower tong plate in the machine frame remains stationary with respect to the tear-off.
• the lower tong plate may perform a slight vertical movement of its tong lip during the tearing operation to better transfer the tuft to a subsequent tearing device.
• the lower tong plate can remain completely immobile in position during comb play. Since essentially only the upper tong plate is driven, few moving parts are involved in the combing process, whereby an increase in Kämmspieltechnik is made possible without causing mechanical overloading of the drive elements.
• the proposed direct drive the movement of the upper tong plate of a non-rotatably seated on the combing cylinder axis curve, the rotational movement of the circular comb is accurately transferred to the movement of the upper tong plate. As a result, an exact synchronization between the combing cylinder and the nipper unit is given.
• the upper tong plate is provided with lateral pivot arms via which it is pivotally mounted about an axis of rotation in the machine frame or on a tong frame of the lower tong plate, wherein the rollers are arranged on the pivot arms at a distance from the axis of rotation.
• the lower tong plate is mounted in the machine frame such that it occupies a substantially constant position during a comb play and the tear-off means is formed of a tear-off, which to form a nip in the direction of, on the circumference of the combing cylinder attached Abreisssegmentes is slidably mounted.
• the combing cylinder is directly involved in the tearing in cooperation with the tear-off.
• the loading device consists of a compressed air source with compressed air acted upon bellows cylinder, which is supported in each case with one end directly or indirectly on the machine frame and with its other end connected to the upper pliers plate elements .
• a loading device could also be used in conjunction with other types of nipper units.
• bellows cylinders for the load of the upper tong plate, as already described, the noise level and the vibrations can be reduced, while at the same time only a small space requirement for these bellows cylinder is necessary.
• bellows cylinder can compensate for certain angular deviations from their loading direction, making them ideal for this purpose, as will be described in more detail in subsequent embodiments.
• the use of bellows cylinders in this application allows stepless adjustment of the
• bellows cylinder is understood to mean a pneumatic lifting device that can be pressurized with compressed air and that is generally provided with a rotationally symmetrical bellows Elastomer is reinforced with a high-strength textile insert.
• a bellows cylinder is supported on the pivot arms of the upper pliers plate.
• a support surface is provided which has an opening into which a, the end face of the respective bellows cylinder protruding extension projects when this on the support surface rests.
• the extension of the respective bellows cylinder and the opening in the support surface may be dimensioned such that together they exert a clamping action on each other.
• the bellows cylinder are secured to the machine frame pivotally mounted arms. That after swinging the bellows cylinder over the arms, the upper pliers plate can also be swung out.
• the claimed arms can also be directly connected to each other and form a total of a pivotable frame which is pivotable as an integral element.
• At least one locking device is provided on the machine frame in order to fix the frame in this position.
• the bellows cylinder is connected via a control valve with a compressed air source, which is reversible via a control unit for generating a Unterduckes.
• FIG. 1a is an enlarged partial view of Fig.1
• Fig. 2 shows an embodiment of Figure 1 with open pliers
• Fig. 3 is a plan view X of Figure 2
• Fig. 4 shows a further embodiment according to Fig.1
• FIG. 1 shows the schematic view of a combing head of a combing machine.
• a multiplicity for example eight
• a multiplicity for example eight
• continuous drive elements longitudinal shafts
• nipper 1 for short
• the upper tong plate 3 is connected to lateral arms 4a, 4b (see also Fig.3), which are pivotally mounted about a pivot axis 6 on the lower tong plate. Since in the present example, the lower tong plate 2 assumes a stationary position (ie, is immovable during a comb play), the pivot axis 6 could also be mounted directly in the machine frame MS.
• a bracket 10 is fixed (schematically two screw connections are indicated), which has at its free end an axis 11 on which a respective roller 12 is rotatably mounted.
• the rollers 12 may be provided for damping with an elastic layer (eg rubber) on its peripheral surface and are depending on the angular position of the combing cylinder 16 on a peripheral surface U of a cam 14 ( Figure 2), which rotatably on the Axis 7 of the combing cylinder is attached.
• an elastic layer eg rubber
• the cam plate 14 is provided with respect to the axis 7 with radically different radii R1, R2 on a portion of the circumference of the combing cylinder 16 a tear-off 20 is fixed, which for tearing off the combed fiber tuft FB ( Figure 2) with a displaceable tear roller 8 a Clamping line KL forms.
• a feed roller 5 is rotatably mounted, which intermittently during a comb play fiber material F (tapes, nonwoven, wadding) from a source, not shown (wraps, cans, etc.) in the direction of the nip K of the forceps 1 supplies.
• the supply is carried out in dependence on the angular position of the axis 7 of the combing cylinder 16 by a gear, not shown.
• a fiber-fleece-forming device 22 is shown schematically, by means of which the fiber packets delivered by the tear-off roller 8 are brought together to form a fiber fleece or soldered.
• the fiber fleece-forming device 22 is hereby provided with a rotating screen drum 23, which is arranged downstream of a doffer roller pair.
• Device may, for. B. the illustrated embodiment of published WO 2006/012759 A1 correspond.
• the pliers 1 is in the closed state, in which a tuft FB protrudes from the closed pliers 1 and is combed out of the combing segment 19 of the combing cylinder 16.
• the clamping force of the clamp for clamping the fiber material is generated by bellows cylinder B1, B2, which at one end via an end face 30 on a transverse strut 28, which is connected to the pivot arms 4a, 4b of the upper tong plate 3, supported.
• bellows cylinders are provided in the region of the end face 30 with an extension 31, which protrudes for lateral fixation of the respective bellows cylinder B1, B2 in an opening 33 of the transverse strut 28.
• the extension 31 and the opening 33 may be formed in the form or in the dimensions such that a releasable clamping connection (clamping force connection) between the extension 31 and the transverse strut 28 is formed.
• a releasable clamping connection clamping force connection
• the pivot arms 37, 38 are in a locked position in which they are fixed by a locking device 50.
• the locking in this position must be designed in such a way that it can not be released automatically during operation.
• the proposed solution is shown by way of example only.
• per Verrieglungsvoriques one per swivel lever
• the latch 54 has a sloping surface 52 on which the bolt 51 slides along when the pivot lever from a high tilted position (see dash-dotted line position in Figure 2) are transferred to the locking position shown.
• the bars are each connected to a spring 55, which are guided in a sleeve 57.
• the sleeve is in each case connected to a lug 58, which is attached to the pivot arm 37, and 38, respectively.
• an end stop 60 is provided, by means of which the pivoting movement in the direction of the combing cylinder 16 is restricted. That is, when pivoting the pivot lever 37, 38 in the locking position shown, the pivot lever 37, 38 on the respective stop 60 at.
• the Balgzyiinder B1, B2 are supplied with compressed air, the levers 37, 38 are lifted up to a distance a, wherein the further lifting is prevented by the locking device 50.
• the Balgzyiinder B1, B2 are connected to a line 44 which is attached to a valve 27.
• the individual lines of the respective Balgzyiinder B1, B2 are combined to form a common line which is connected to the valve 27.
• only one line 44 is shown in the present example.
• the circuit of the valve 27 via an electromagnet 21, which is controlled via the line 46 by a control unit ST.
• a compressed air source 26 is connected via line 48 to the valve in connection.
• the drive of the shaft 7 of the combing cylinder 16 via a transmission G which is controlled via the line 47 of the control unit ST.
• the combing cylinder 16 is provided with a modulated speed from the transmission G is driven.
• the circumferential speed of the combing cylinder changes during a combing cycle and is adapted to the special working cycle (combing, tearing off).
• the peripheral speed of the combing cylinder 16 during tearing off could be lower, in order to ensure a gentle discharge of the drawn fiber packets onto a subsequent screening drum.
• modulated speeds in a combing cylinder (circular comb) of a conventional combing machine is already common prior art, such. In JP-57056525 (A).
• the roller 12 In the position shown in Figure 1, the roller 12 is not on the circumference U of the cam 14 with the radius R2, so that the compression force generated by the under pressure Balgzylindern B1, B2 at the nip K of the pliers is fully effective , Upon further rotation of the shaft 7, or the cam plate 14, the area of the cam plate 14 with the larger radius R1 reaches the area of the roller 12, as shown in FIG. Characterized the roller 12 is raised with respect to the stationarily arranged lower tong plate 2 and thereby pivots the pivot arms 4a, 4b about the axis 6, whereby the forceps 1 opens.
• the tear-off roller 8 has been displaced in the direction of the axis 7 and, together with the tear-off segment 20, forms a nip line for detecting the end of the already combed fiber tuft FB.
• the tear-off roller 8 is pressed against the tear-off segment 20 with a loading device, not shown, in this position.
• the departure process is now started, wherein the fiber packets torn off via the nip line are delivered to a screen drum, on which the formation of a fiber web takes place, which is removed via the pickup rollers for further processing.
• Fix comb FK engaged in tuft FB through which the withdrawn fiber material is pulled through.
• the roller passes again in the region of the smaller radius R2, where it again assumes the position already described in Figure 1.
• the tear-off roller 8 is lifted and the combing cycle begins again.
• the swivel arms 37, 38 can be transferred into an upwardly swung-out position after release of the locking device 50, as indicated in phantom in FIG.
• the extensions 31 of the bellows cylinder B1, B2 are pulled out of the openings 33 of the cross strut and the bellows cylinder B1, B2 pivoted with the pivot arms in the upper position of inoperative position.
• a locking device not shown, may be provided.
• the upper pliers blade 3 can also easily be pivoted about the pivot axis 6 via the pivot arms 4a, 4b. The pivoting back into the working position takes place in the corresponding reverse order.
• Fig. 4 a further embodiment is shown, wherein most of the elements also coincide with the elements which have been shown in the example of Fig. 1. Therefore, the same reference numerals are used for this example. The only difference to the embodiments previously shown is the different attachment of the upper tong plate 3.

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

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Publications (1)

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ID=41110817

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Citations (4)

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• 2008
  • 2008-07-31 CH CH12002008A patent/CH699285A2/de not_active Application Discontinuation
• 2009
  • 2009-07-09 WO PCT/CH2009/000246 patent/WO2010012112A1/de active Application Filing
  • 2009-07-09 CN CN2009801298104A patent/CN102112670B/zh active Active
  • 2009-07-09 EP EP09775743A patent/EP2307597B1/de active Active

Patent Citations (4)

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