EP0867540A1 - A sliver guide for combing machines - Google Patents

A sliver guide for combing machines Download PDF

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Publication number
EP0867540A1
EP0867540A1 EP97202348A EP97202348A EP0867540A1 EP 0867540 A1 EP0867540 A1 EP 0867540A1 EP 97202348 A EP97202348 A EP 97202348A EP 97202348 A EP97202348 A EP 97202348A EP 0867540 A1 EP0867540 A1 EP 0867540A1
Authority
EP
European Patent Office
Prior art keywords
guide plate
sliver
slivers
plate
guide
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.)
Withdrawn
Application number
EP97202348A
Other languages
German (de)
English (en)
French (fr)
Inventor
Angelo Verzegnassi
Marziano Nonis
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.)
Vouk SpA Officine Meccanotessili
Original Assignee
VOUK MACCHINE TESSILI SpA
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 VOUK MACCHINE TESSILI SpA filed Critical VOUK MACCHINE TESSILI SpA
Publication of EP0867540A1 publication Critical patent/EP0867540A1/en
Withdrawn legal-status Critical Current

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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
    • D01G19/08—Feeding apparatus

Definitions

  • the present invention relates to a guide plate for slivers as defined in the preamble of appended Claim 1.
  • the web of textile fibres to be combed, or the sliver is unrolled from a reel by means of rotating grooved rollers and extends across the guide plate as far as the oscillating nipper structure which comprises a feed roll and from which the sliver passes to the actual combing machine.
  • the sliver As it passes from the grooved rollers to the feed roll, the sliver must always be kept under slight tension. This requirement is hampered, however, by the fact that, in order to carry out the combing operation, together with the detaching rollers and with the rotary comb of the combing machine, the nipper structure performs an oscillatory movement. As a result, the length of the path which the sliver has to follow varies continuously between a minimum value and a maximum value.
  • the advance of the sliver must be as smooth and uniform as possible, irrespective of the aforementioned oscillatory motion which, however, tends to cause stoppages and breakage of the sliver because of insufficient or excessive tension.
  • the guide plate As described in the publication EP 0409775, it has been proposed to form the guide plate as a single piece of plastics material connected, on the one hand, to the oscillating nipper structure and, on the other hand, to the frame of the machine close to the unrolling roller of the sliver feed unit.
  • the plate has a reduced thickness along a bend line perpendicular to the direction of sliding of the sliver so that, in practice, it is constituted by two portions which move relative to one another as if they were joined by a hinge.
  • This solution has been found to be quite critical with regard to the selection of the material and is not always satisfactory with regard to the uniformity of the tensioning of the sliver.
  • the object of the present invention is to provide a guide plate for slivers which enables the tension of the sliver to be kept uniform and is of simple and reliable construction.
  • a sliver feed device is associated with an oscillating Ripper structure 2 in a combing machine, not shown.
  • the device 1 comprises a feed unit with a grooved roller 3 which rotates so as to unroll from a reel 20 a sliver 4 to be combed.
  • the grooved roller 3 rotates about an axis which is fixed relative to the frame of the device 1, not shown, which in turn is fixed to the frame of the machine.
  • the device 1 also comprises a guide plate 5 which is associated with the nipper structure 2 and is arranged to guide the sliver 4 to be combed, which is advancing towards a feed roller 6 of the oscillating nipper structure 2.
  • the guide plate 5 is substantially right-angled in shape and comprises a first, substantially quadrangular portion which is arranged horizontally and receives, on its upper face, the sliver from the grooved roller 3.
  • the first portion 7 is fixed to the frame of the feed device 1 and is constituted by a metal plate made of stainless steel, advantageously rendered smooth by polishing on its upper face.
  • the guide plate 5 also comprises a second portion 8 which is also substantially quadrangular, is arranged in a transverse position relative to the first portion 7, and supplies the sliver to the feed roller 6 of the nipper structure 2.
  • the plate 5 also comprises a rounded, bent portion 9 disposed in an intermediate position relative to the first and second portions 7, 8, to complete the right-angled shape. It has a convex part 10 over which the sliver 4 slides before passing over the second portion 8.
  • the second portion 8 has a lower end 11 by which it is articulated to the oscillating Ripper structure 2, close to the feed roller 6.
  • the second portion 8 Opposite the lower end 11, the second portion 8 also has an upper end 12 by which it is rigidly connected to the bent portion 9, defining therewith a curved sliding surface for the sliver, the second portion 8 being movable and guided by guide means fixed to the frame.
  • the bent portion 9 and the second portion 8 are formed in a single piece by a single, suitably-bent metal plate, preferably made of stainless steel and advantageously polished on the bent sliding surface.
  • the guide means comprise at least one connecting rod.
  • the position in which the connecting rods 30 are connected along the sides of the portion 8, that is, the position of the axis of rotation 13, is selected so as to take account of the movement of the Ripper structure 2 so that the path of the sliver 4 between the grooved roller 3 and the feed roll 6 is substantially constant during the operation of the machine.
  • the oscillating nipper structure performs a complex oscillatory motion since one end 21 thereof is restrained on the frame so as to describe an arc about a first point 22 on the frame and its opposite end 23 is restrained so as to describe an arc about a second point 24 on the frame.
  • the plate 5 has one end, the lower end 11 of the second portion 8, which follows the motion of the nipper structure 2.
  • the distance between the bent portion 9 and the grooved roller 3 remains substantially constant, even though the portion 9 has a free end 14 which describes an arc in space. Owing to the bending, this free end does not interfere with the motion of the sliver 4 which rises and falls, accompanied by the end 14, whilst the first portion 7 helps to guide it.
  • the device 1 again comprises a feed unit with a grooved roller 3 which rotates so as to unroll from a reel 20 a sliver 4 to be combed.
  • the grooved roller 3 rotates about an axis which is fixed relative to a frame of the device 1, not shown, which in turn is fixed to the frame of the machine.
  • the device 1 also comprises a guide plate 5 which is associated with the Ripper structure 2 and is arranged to guide the sliver 4 to be combed which is advancing towards a feed roller 6 of the oscillating Ripper structure 2.
  • the guide plate 5 is of a substantially right-angled shape and comprises a first, substantially quadrangular portion 7 which is arranged horizontally, receives the sliver from the grooved roller 3, and, advantageously, is polished on its upper face to facilitate the passage of the sliver 4.
  • the guide plate 5 also comprises a second portion 8 which is also substantially quadrangular, is arranged in a position substantially perpendicular to the first portion 7, and supplies the sliver to the feed roll 6 of the nipper structure 2.
  • the plate 5 also comprises a rounded, bent portion 9 which is in an intermediate position relative to the first and second portions 7, 8 to complete the right-angled shape. It has a convex part 10 over which the sliver 4 slides before passing over the second portion 8.
  • the second portion 8 has a lower end 11 by which it is articulated to the oscillating nipper structure 2 close to the supply roll 6.
  • the second portion 8 also has an upper end 12 by which it is connected rigidly to the bent portion 9.
  • the first portion 7 is also connected rigidly to the bent portion 9 on the opposite side.
  • portion 9 and the second portion 8 define for the sliver a curved sliding surface which also comprises the first portion 7.
  • the first portion 7, the bent portion 9 and the second portion 8 are preferably formed in one piece by a suitably-bent metal plate made of stainless steel, advantageously polished on the curved sliding surface.
  • the bent portion 9 and hence the entire plate 5 is restrained on the frame of the machine by means of at least one connecting rod.
  • the position in which the connecting rods 30 are fixed is selected by the same criterion as in the embodiment described with reference to Figures 1 and 2.
  • the intermediate bending point on the portion 9 where the sliver changes direction is also always at a substantially constant distance from the feed roller 6 ( Figure 3 compared with Figure 4) during the movement of the nipper structure 2.
  • the distance between the bent portion 9 and the grooved roller 3 remains substantially constant, even though the first portion 7 has a free end 15 which describes an arc in space.
  • the free end 15 does not interfere with the movement of the sliver 4 which rises and falls alternately in operation whilst the first portion 7 helps to guide the sliver 4.
  • an angle of no less than 70° and no more than 90° is included between the first portion 7 and the second portion 8.
  • the guide means of the portion 8 of the plate 5 are constituted by two pins 13' (only one of which is visible in the drawing) which are fixed laterally to the upper end of the portion 8, and by two slots 50 formed in respective plates 51 fixed to the frame and defining a track for the pins 13'.
  • the slots 50 may define a straight track, as shown in the drawing, or may be shaped so as to define an arcuate track.
  • suitable means of known type, not shown, may be provided for fixing the plates 51 to the frame in an adjustable manner.
  • the guide plate according to the invention is structurally simple, is easy to fit and maintain and can be produced at low cost. Moreover, it is substantially immune to wear since it does not have parts which are subject to deformation or bending in operation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Guides For Winding Or Rewinding, Or Guides For Filamentary Materials (AREA)
EP97202348A 1997-03-25 1997-07-25 A sliver guide for combing machines Withdrawn EP0867540A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT97MI000693A IT1290827B1 (it) 1997-03-25 1997-03-25 Piastra guida-teletta per pettinatrici
ITMI970693 1997-03-25

Publications (1)

Publication Number Publication Date
EP0867540A1 true EP0867540A1 (en) 1998-09-30

Family

ID=11376609

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97202348A Withdrawn EP0867540A1 (en) 1997-03-25 1997-07-25 A sliver guide for combing machines

Country Status (2)

Country Link
EP (1) EP0867540A1 (it)
IT (1) IT1290827B1 (it)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105671696A (zh) * 2016-02-22 2016-06-15 经纬纺织机械股份有限公司 精梳机弹性张力板

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2559074A (en) * 1945-05-17 1951-07-03 Terrell Mach Co Lap changer for combing machines
FR1293005A (fr) * 1961-03-20 1962-05-11 Alsacienne Constr Meca Perfectionnement aux peigneuses de fibres textiles
US3320643A (en) * 1962-05-07 1967-05-23 Howa Machinery Ltd Independent swing motion apparatus for feed roller in rectilinear comber
JPH03146724A (ja) * 1989-10-26 1991-06-21 Tokyu Kk コーマ機のラップ解舒案内装置
EP0437807A1 (de) * 1990-01-17 1991-07-24 Maschinenfabrik Rieter Ag Verfahren zum Wechseln des Wattewickels in wenigstens einem Kämmkopf einer Kämmaschine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2559074A (en) * 1945-05-17 1951-07-03 Terrell Mach Co Lap changer for combing machines
FR1293005A (fr) * 1961-03-20 1962-05-11 Alsacienne Constr Meca Perfectionnement aux peigneuses de fibres textiles
US3320643A (en) * 1962-05-07 1967-05-23 Howa Machinery Ltd Independent swing motion apparatus for feed roller in rectilinear comber
JPH03146724A (ja) * 1989-10-26 1991-06-21 Tokyu Kk コーマ機のラップ解舒案内装置
EP0437807A1 (de) * 1990-01-17 1991-07-24 Maschinenfabrik Rieter Ag Verfahren zum Wechseln des Wattewickels in wenigstens einem Kämmkopf einer Kämmaschine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 15, no. 369 (C - 0868) 18 September 1991 (1991-09-18) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105671696A (zh) * 2016-02-22 2016-06-15 经纬纺织机械股份有限公司 精梳机弹性张力板

Also Published As

Publication number Publication date
IT1290827B1 (it) 1998-12-11
ITMI970693A1 (it) 1998-09-25

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