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
  • D01G19/28—Air draught or like pneumatic arrangements

Definitions

• the invention relates to a nipper unit of a combing machine, with a lower pliers plate, which can form a nip with a movable in the nipper unit upper pliers plate in the region of their pliers lip and a within the nipper unit above the lower pliers plate rotatably mounted feed roller, wherein the nipper unit at least one, in
• Machine frame mounted Abreisszylinder to form a Abreissklemmline is downstream and with a, between the feed roller and the nipper lip on the lower nipper plate removably mounted and aligned transversely to the conveying direction of the fiber mass web, wherein below the lower nipper plate rotatably mounted circular comb for combing out fiber tufts is arranged.
• One method is the adjustment of the Ecartement, which marks the distance between the pliers lip of the lower tong plate and the terminal point of the tear-off cylinder.
• a large Ecartement results in a high Auskung, while a small Ecartement a small Auskung is achieved.
• To adjust the Ecartement the coupling is rotated on the forceps shaft, so that the position of the swinging movement, or the pivoting of the pliers changed by a corresponding amount, whereby the Ecartement is larger or smaller depending on the adjustment. Furthermore, it is possible to reduce the proportion of combing through the choice of
• Results can be achieved, but repeatedly get short fiber in the combed nonwoven, which adversely affect the desired quality.
• the web can be exchanged for another with a different geometry. That the bridge is fixed removable. From the publication of an embodiment is known, wherein the web in the field of
• the magnetic means may consist of several means, which are mounted on the entire length of the web (ie also in the middle region of the web).
• the lower tong plate is at least in the area of a ferromagnetic material in which the web is mounted.
• the magnetic means - seen in the longitudinal direction of the web - consist of several spaced apart, fixed to the web magnet.
• the necessary number of magnets can be set, which are necessary to keep the bridge securely on the lower pliers plate even at high dynamic influences, which, for. B. occur in a reciprocating pliers.
• this ensures the complete abutment of the web on the pliers plate also in the middle region, whereby the fiber material can not adhere.
• the magnets are mounted in recesses of the web.
• the web in the region of its two ends has projections which point in the direction of the support surface of the lower pliers plate and protrude into recesses of the lower pliers plate and form a positive connection with these.
• the bridge during its installation can be easily transferred to the elevations in the recesses of the pliers plate and is then in this position by the positive locking safely in its installed position for
• the web is provided in the region of its two ends with, from its guide surface, upwardly projecting side guides for the fiber material.
• the respective side guide is connected to the respective elevation and the web in this area has an opening through which at least a portion of the respective Survey and / or at least a part of the respective side guide protrudes.
• This blocking can be achieved by the corresponding design of the side guides, which face at least on one side of the feed roller. It is proposed that the side guides on the side opposite to the feed roller are each provided with an arcuate surface which, in the installed position, has a spacing of between 0.1 and 2.5 mm from the circumferential surface of the feed roller.
• the web (32) in the region of the guide surface (35) has a
• FIG. 1 shows a schematic side view of a known combing machine in the region of the nipper unit.
• FIG. 2 shows a schematic side view of another known combing machine in the region of the nipper unit
• FIG. 3 is a schematic partial view of the nipper assembly of Figure 1 or Figure 2 in the closed position with an inventive attachment of a
• FIG. 5a shows a further embodiment of the attachment of the web according to Fig.5
• Fig.5b is a partial view Y of Figure 5
• Figure 1 shows a known nipper unit 1 (called “tongs” for short), which is pivotally mounted on the crank arms 2, 3.
• two crank arms 2 are each mounted laterally of a circular comb 4 on the circular comb shaft 5 pivotally.
• the circular comb 4 has a comb segment 7 on a part of its circumference.
• the other end of the pivot arms 2 is rotatably mounted on a clamp frame 8.
• the rear pivot arm 3 (there may also be two) is rotatably mounted on a tongs shaft 0.
• the opposite free end of the pivot arm 3 is rotatably connected via a shaft 9 with the clamp frame 8.
• several combing heads are arranged side by side on a combing machine, each combing head having a nipper unit. In the examples, however, the invention ungsgemässe attachment of a web is shown and described only on a single nipper unit.
• the forceps 1 consists essentially of a fixed to the forceps frame 8 lower pliers plate 12 and an upper pliers plate 14 (sometimes called also pliers knife), which is attached to two pivot arms 15, 15 '. These pivot arms are pivotable about a pivot axis 16 on
• Strut 18 is connected, in turn, via an axle 20 on a driven Excenter 21 are stored.
• the Abreisszylindercru 24 consists of a lower
• Tear-off cylinder 24a which cooperates with a tear-off pressure cylinder 24b to form a tear-off clamping line K.
• a tear-off clamping line K Schematically indicated is a fixed comb 11, which is fastened to the forceps frame 8 by means not shown, and in which the tuft FB of the fiber material W (eg a cotton or fiber slivers)
• a feed roller 27 is rotatably mounted, which is connected via a drive not shown in detail and performs a discontinuous rotational movement in order to transport the supplied cotton W in sections.
• the feed cylinder 27 has a shaft 28, via which it is rotatably mounted on both ends via bearings not shown in detail in bearing receptacles of the nipper frame.
• the drive of the feed roller 27 can be done via a known jack drive, which is controlled by the movement of the upper tong plate 14.
• the drive of the cam used in this embodiment directly on the circular comb shaft, as e.g. is shown in DE-
• Feed roller 27 can be done in the forward or reverse of the pliers or even proportionally in the supply and return. Subsequent to the feed roller, on the conveying path between the feed trough 26 and the nipper lip 30 of the lower tong plate, the fiber material is guided over a contact surface AF, on which, as will be shown in FIGS. 3 to 5, the attachment of a web 32 according to the invention can be done.
• bores 52 52 '
• bores 52 are provided in the area of the support surface AF, which are outside the conveying path of the fiber material W and are provided for receiving a web 32.
• remove these holes can be designed as blind holes 52 or as through-holes 52 '.
• Through-holes 52 ' have the advantage that no dirt can accumulate in the region of the bore, if no web 32 is attached.
• the combing takes place with Zangel closed, if this is in a rear position (not shown). In this case, the end of the fiber material projecting from the tongs (also called fiber tuft FB) reaches the area of the combing segment 7 of the circular comb 4 and is combed out.
• the pliers are pivoted to a forwardmost position while being opened.
• the combed end of the fiber tuft FB is placed on the end of a previously partially transported back fiber web V and then transferred by the transport movement of the fiber web to the terminal point K of the tear-off cylinder 24.
• the tuft FB arrives in the area of the needles of a fixed comb 11.
• the rotational movement of the tears 24 causes the fibers of the tuft FB, which reach the nip K, to be pulled out of the tuft and soldered to the end of the fleece V.
• the nonwoven fabric is then over known
• FIG. 2 shows a further known embodiment of a nipper unit 1 (pliers) of a combing head of a combing machine, in which, unlike the example of FIG. 1, the nipper frame 8a is fixedly mounted in the machine frame MS with the lower nipper plate 12.
• the upper tong plate 14 is at two Swivel arms 15, 15 'attached, which are pivotally mounted about the axis 16 on the forceps frame.
• the pivoting movement of the upper pliers plate 14 is controlled by an arm 45, which via a pivot axis 46 on
• the respective pivot arm 15, or 15a is articulated.
• the respective arm 45 has a rotatably mounted roller 47 which rests on the outer circumference UF of a cam KS.
• the cam KS is rotatably mounted on the circular comb shaft 5 of a circular comb 4a.
• the rollers 47 one of which is provided at each end of the circular comb, are held in contact with the respective circumference UF of the cam KS via loading elements which act on the pivot arms 15, 15 '.
• load elements for each of the pivot arms 15, 15 ' are in the present case bellows cylinder 40th
• Belgzylinder 40 may be attached to the opposite end of the machine frame or on a pivot frame, not shown. Such a device may, for. B. be taken from the published WO 2010/012113 A1. In this publication, as shown in the present example of Figure 2, a
• the tear-off cylinder 22 is, as schematically indicated by a double arrow, rotatably mounted via an axis 23 which is slidably mounted in the direction of the circular comb axis 5.
• the forceps 1 is opened, wherein the forceps lip 31 of the upper forceps plate 14 is lifted from the forceps lip 30 of the lower forceps plate 12 and the end E of the forceps protruding from the tongs, already combed fiber tuft FB in the nip K1 is held between the tear-off segment 37 and the tear-off cylinder 22.
• the tear-off cylinder 22 is pressed against the peripheral surface of the tear-off segment 37 via loading means, not shown, and rotated by friction by the movement of the tear-off segment. There during this tearing off the supply via the feed roller 27 of further fiber material W (Wattebahn or slivers) is prevented over the
• Fiber material W deducted Ie. All fibers, which are not retained by the nip in the area between the feed roller 27 and its associated feed trough 26 are withdrawn via the nip K1. In this tearing off the fiber material is pulled through the clothing of the Fixkammes 11.
• the fiber material W (also as in the example of Figure 1) is guided over a support surface AF, in which at both ends, which lie outside the conveying path of the fiber material, bores (Depressions) 52 (52 ')
• the fiber package drawn off from the end of the fiber material is transferred in the direction of a following, rotatably mounted screening drum 42, to which in the
• a negative pressure from a vacuum source U is applied.
• a cover element 43 is provided inside the screen drum. During the soldering process under the action of the generated negative pressure, the end of the withdrawn fiber bundle is placed on the end of the webbed on the nonwoven fabric V and brought into an overlap with this.
• the nonwoven fabric formed in this way passes through the rotational movement of the screening drum indicated by the arrow into the region of a
• FIG. 3 shows an enlarged partial section of the forceps 1 (according to FIG. 1 or FIG. 2) in the closed position in the front region of the forceps lip 30 of the lower one Pliers plate 2.
• the pliers plate 12 on a feed trough 26 which cooperates with the feed cylinder to transport the, supplied by a template (cotton wool, cans) fiber material W in the direction of the front tong lip 30.
• Cross-section provided web 32 mounted on the lower tong plate 12, which extends transversely to the material flow direction F across the width B of the fiber material W.
• the web 32 which has a height H, is provided with a guide surface 35, via which the, guided by the feed roller 27 from the feed trough 26 fiber material W is guided and then into the clamping area of the
• Pliers lip 30 arrives.
• side guides SF1 and SF2 are mounted above the guide surface 35 at both ends of the web 32, as can be seen in particular from FIG. 5 (view X of FIG.
• Clamp point KU of pliers 1 stands out significantly for the percentage of combing out. Ie. the larger the dimension a, the more fibers are no longer clamped by the nip KU and are thus combed out by the combing segment.
• the combing becomes smaller when the dimension a is smaller.
• the dimension a and thus the degree of combing can be determined by the selection of the height H of the web 32, with Ecartement Ec remaining the same.
• the Ecartement Ec is the distance between the smallest distance between the nipper lip 30 of lower pliers plate 12 and the subsequent tear-off line K, or K1.
• the Ecartement Ec can be influenced by changing the pivoting movement of the pliers.
• the Ecartement between the nipper lip 30 and the Abreissklemmline K1 is substantially constant and can only be changed by moving the Abreisszylinders.
• the attachment of the lateral guides SF1, SF2 can be seen from the Fig.4 and Fig.5.
• the web is provided in the region of its two ends, each with a bore 53 in which a pin 54 is attached.
• the attachment can be done by pressing or by gluing.
• the pin 54 (with, for example, a circular cross-section) projects beyond the guide surface 35 of the web 32 with a smaller-diameter attachment 55.
• the attachment 55 protrudes into a depression 58 of the respective guide SF1 or SF2.
• the attachment 55 is firmly connected to the respective guide SF1, SF2 by pressing or gluing.
• the pin 54 a positive connection with a recess 52 is made during installation of the web, which is mounted in the lower tong plate 12.
• the cross-sectional shape of the pin 54 and the recess 52 are designed and dimensioned to each other to ensure a tight fit.
• the pin is provided with a circular cross-section.
• the recess is designed as a blind hole 52 or as a through hole 52 '.
• the dimensioning of the recess 52 and the pin 54 is set so that a manual disassembly and
• the pin 54 may be provided with a chamfer 54 '( Figure 5), to facilitate insertion of the pin in to allow the recess 52 (52 ').
• a blind hole 52 the end of the protruding into the blind hole pin 54 still has a small distance to the end of the blind hole 52, if the web 32 with the lower web surface SU completely on the support surface AF of the lower
• Pliers plate 12 rests. This is shown schematically in the embodiment of Figure 5. This ensures complete installation of the bar on the tong plate.
• the magnets 50 z. B. are designed in the form of a circular disc.
• the lower surface of the magnets 50 is exactly on the level of the lower surface SU of the web 32 or is offset to a slight extent between 0.05 and 0.5 mm inwards.
• the guides SF, SF2 have a corresponding arc-shaped side surface 55 in the installed state of the web 32 and the feed roller 27 a small distance d between 0.1 and 2.5 mm to the peripheral surface US of the feed roller 27 has.
• the web 32 can move maximally in the position which is shown in dashed lines. In this position, the side surface 56 comes to stop against the peripheral surface US of the feed roller 27, which a further movement of the web 32 is blocked or blocked.
• the pin 54 protrudes in this position with a measure c in the recess 52 of the lower
• a further embodiment is shown, wherein for securing the web 32 on the lower pliers plate 12 of the web 32 in the region of its two ends (only one end shown), each with a continuous bore 65 is provided.
• each a bolt 60 is fixed, which faces the respective bore 65 prior to assembly of the web 32.
• the bolts 60 with a
• the side guides SF1, SF2 otherwise have the same shape as in the embodiments of Figure 4 and Figure 5.
• Support surface AF of the lower tong plate 2 rests on its entire length.

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

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

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ID=46275604

Family Applications (1)

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Cited By (1)

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Citations (4)

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• 2011
  • 2011-06-06 CH CH00954/11A patent/CH705071A2/de not_active Application Discontinuation
• 2012
  • 2012-05-25 JP JP2014513872A patent/JP6016901B2/ja not_active Expired - Fee Related
  • 2012-05-25 CN CN201280027425.0A patent/CN103562450B/zh not_active Expired - Fee Related
  • 2012-05-25 EP EP12727224.3A patent/EP2718489B1/de not_active Not-in-force
  • 2012-05-25 WO PCT/CH2012/000118 patent/WO2012167389A1/de active Application Filing

Patent Citations (4)

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