EP4219811A1 - Contrepoids pour un dispositif de peignage d'une peigneuse - Google Patents

Contrepoids pour un dispositif de peignage d'une peigneuse Download PDF

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Publication number
EP4219811A1
EP4219811A1 EP23150967.0A EP23150967A EP4219811A1 EP 4219811 A1 EP4219811 A1 EP 4219811A1 EP 23150967 A EP23150967 A EP 23150967A EP 4219811 A1 EP4219811 A1 EP 4219811A1
Authority
EP
European Patent Office
Prior art keywords
shaft
counterweight
circular comb
balancing weight
clamping sections
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.)
Pending
Application number
EP23150967.0A
Other languages
German (de)
English (en)
Inventor
Tobias BURKHARD
Christian Dratva
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.)
Graf und Cie AG
Original Assignee
Graf und Cie AG
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 Graf und Cie AG filed Critical Graf und Cie AG
Publication of EP4219811A1 publication Critical patent/EP4219811A1/fr
Pending 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
    • D01G19/10—Construction, mounting, or operating features of combing elements

Definitions

  • the present invention relates to a counterweight for a combing device of a combing machine, the counterweight having a length in a longitudinal direction and a transverse direction and having at least two through-openings in the transverse direction for attachment to a surface of a circular comb shaft with a circular comb shaft diameter and at least two through-openings in the transverse direction for bracing is provided with a round comb.
  • Such balancing weights are used for combing devices, which are used in combing machines to comb out a fiber mass (cotton, wool, etc.) in order to compensate for an imbalance caused by the construction of the circular combs during operation.
  • the fiber mass can be presented in the form of wadding webs wound onto sleeves or in the form of individual slivers.
  • the numbers of nips (nips/minute) have increased significantly in recent years, which also brings with it an increase in productivity.
  • the circular combs used in practice for the combing machine consist of a circular comb carrier which is provided with a clamping hub or some other type of support surface with which it is fixed in a rotationally fixed manner on a driven circular comb shaft.
  • a combing segment is fastened to a partial circumference of the circular comb carrier, with which the end of the fiber mass (also called fiber tuft) presented by a nipper unit is combed out.
  • the object of the present invention is therefore to create a counterweight for the secure connection of circular comb carrier, counterweight and circular comb shaft, which ensures a displacement-free connection between counterweight and circular comb shaft even at high accelerations.
  • a counterweight for a circular comb of a combing machine having a length in a longitudinal direction and a transverse direction and having at least two through-openings in the transverse direction for attachment to a surface of a circular comb shaft with a circular comb shaft diameter and at least two through-holes in the transverse direction for bracing with a circular comb is provided.
  • the balancing weight is designed in the form of an annular circular arc section with a section angle ⁇ of 70 to 110 degrees for contact with the surface of the comb shaft.
  • the longitudinal direction of the counterweight corresponds to a length extension of the crested shaft. Seen in a cross-section, the counterweight encloses the comb shaft by an angle of 70 to 110 degrees. The remaining circumference of the circular comb shaft is thus available for the circular comb opposite the counterweight.
  • a trapezoidal indentation with a base area is provided in the longitudinal direction over the entire length of the balancing weight, on a side of the balancing weight facing the circular comb shaft.
  • the through-openings and the through-holes open into the base area and the depression is delimited by oblique surfaces which are arranged on both sides when viewed in the longitudinal direction and enclose an opening angle ⁇ of 45 to 75 angular degrees.
  • the indentation corresponds to a longitudinal groove made in the balancing weight, which has a flat base area and opens towards a side opposite the base area. Through this The opening of the depression results in the above-mentioned inclined surfaces as lateral boundary surfaces and the associated trapezoidal shape of the depression.
  • An external shape of the balancing weight can correspond to a design adapted by a manufacturing process. If the counterweight is made, for example, from a round rod-shaped blank, then the outer boundary of the counterweight corresponds in cross section to a circular arc segment. If, in an alternative production method, the counterweight is made, for example, from a rectangular rod-shaped blank, then an outer contour of the counterweight corresponds to a polygon in cross section.
  • the through-openings and through-holes in the counterweight open into the base area, as a result of which it is possible to fasten it to the circular comb shaft by means of screws hitting a surface of the circular comb shaft perpendicularly.
  • the through-openings and through-bores are advantageously provided with countersinks for the use of countersunk or cylinder head screws on a side of the circular comb shaft facing away from the circular comb shaft.
  • the shape of the indentation results in defined contact points when the counterweight rests on the circular comb shaft.
  • the inclined surfaces meet tangentially on the surface of the crested shaft, resulting in a line of contact between the counterweight and the surface of the crested shaft. In contrast to previous constructions, this allows the counterweight to be used on already used crested shafts which do not have a perfect surface or an exact roundness.
  • the surface of the comb shaft is deformed by the attachment of the counterweight. This creates a non-slip connection between the counterweight and the comb shaft that is safe for power transmission.
  • the normal force on the inclined surfaces increases and larger torsional forces can thus be conducted via the counterweight, so that the counterweight has a stiffening effect on the circular comb shaft.
  • the section angle ⁇ is preferably 80 to 100 degrees and particularly preferably 90 degrees. With a section angle ⁇ of 90 degrees, there is an optimal introduction of the contact pressure forces from the counterweight into the comb shaft, as a result of which a considerable improvement in the torsional rigidity of the comb shaft is achieved.
  • the depression has a depth of less than 0.6 times the diameter of the crested shaft.
  • a support of the counterweight on the comb shaft is seen in cross section, so far shifted towards the center of the comb shaft that the counterweight with its center of gravity can be brought as close as possible to the comb shaft.
  • Round comb shafts of different diameters are used. Since a tangential bearing of the inclined surfaces on the surface of the comb shaft is provided, the structurally preferable depth results from a ratio to the diameter of the comb shaft. In the case of a larger crested shaft, a correspondingly greater depth of the indentation is to be provided.
  • Each inclined surface preferably has at least three clamping sections, with the clamping sections each having an extension of 4 to 20 mm when viewed in the longitudinal direction.
  • clamping sections those areas of the compensating weight which are formed in a special configuration in order to limit the contact of the compensating weight on the surface of the circular comb shaft in a targeted manner to those areas are referred to as clamping sections.
  • the clamping sections are characterized by the fact that in a clamping section, when the balancing weight rests on the circular comb shaft, a raised surface acts as a support before the balancing weight comes into contact with the surface of the circular comb shaft over its entire length, or due to a special surface condition of the Counterweight penetration of the counterweight into the surface of the circular comb shaft is achieved.
  • the local normal force increases due to the reduced contact length, which leads to better force transmission. Elevations can be formed, for example, as spikes, grooves or points.
  • the surface finish can be changed, for example, by increasing the surface hardness in a limited manner in the clamping section, or by coating or attaching an insert made of a different material compared to the remaining part of the balancing weight.
  • Each inclined surface particularly preferably has four clamping sections and the clamping sections have an extent of 8 to 16 mm.
  • an expansion of the clamping sections of 4 mm is already sufficient to achieve a reliable connection between the circular comb shaft and the counterweight.
  • An extension of 12 mm has been found to be the optimum size, with sufficient adhesion of the balancing weight on the comb shaft being achievable with the least possible dependence on a suitable procurement of the surface of the comb shaft.
  • the clamping sections of two opposing oblique surfaces are arranged symmetrically with respect to one another, viewed in the longitudinal direction.
  • symmetrical means that in each case two clamping sections on one inclined surface face a single clamping section on the opposite inclined surface. With four clamping sections per inclined surface, these are each arranged symmetrically in pairs (point symmetrically to the comb shaft).
  • the symmetrical arrangement has the advantage that when the compensating weight is fastened to the comb shaft, there is also a symmetrical introduction of the holding forces into the comb shaft and the compensating weight, so that a one-sided deformation of the comb shaft or the compensating weight can be ruled out.
  • the clamping sections are provided with grooves which are less than 1 mm deep.
  • a simple construction of the clamping sections Due to the grooves, the surface pressure at the tips of the grooves is increased and the grooves are pressed into the surface of the crested shaft, which leads to a secure and non-slip connection of counterweight and crested shaft. It has been found that a good connection can be achieved with a groove height of just 0.2 mm.
  • the clamping sections are preferably each arranged at a through-opening. With this arrangement of the clamping sections, an optimal introduction of force into the clamping sections is achieved during a screw connection.
  • the counterweight advantageously has a surface hardness of at least 350 HV in a region of the clamping sections. Hardening the surface means that the clamping sections are much harder than the surface of the comb shaft, which means that it is easier for the counterweight to penetrate the surface of the comb shaft.
  • a gap of at least 0.1 mm is preferably provided between the surface of the circular comb shaft and the base area of the depression.
  • the base of the recess comes into contact with the surface of the comb shaft when the balancing weight is attached to the comb shaft. Since when attaching the counterweight to the circular comb shaft by penetrating the counterweight into the surface of the circular comb shaft, the counterweight is used by an amount of penetration of the circular comb shaft, it is advantageous if a sufficiently large play is provided. As a result, tension can be limited to the clamping sections and is consequently determined by the interaction of the clamping sections with the surface of the comb shaft.
  • a combing device is also proposed with a circular comb and a circular comb shaft and a balancing weight as described above, the circular comb shaft having a circular comb shaft axis which is arranged parallel to the longitudinal direction of the balancing weight.
  • Two through holes for attaching the counterweight to the round comb shaft and four through holes for bracing the round comb with the balancing weight are provided.
  • the separate through openings for attaching the counterweight to the circular comb shaft have the advantage that, on the one hand, the counterweight can remain on the circular comb shaft when the circular comb is changed and, on the other hand, a fastening force is determined for the effect of the depression on the surface of the circular comb shaft, regardless of the circumstances of the circular comb construction can be.
  • the counterweight with the clamping sections preferably rests on the surface of the circular comb shaft and in the area of the clamping sections additional through openings and/or through bores are provided in the counterweight for attachment to the circular comb shaft and/or for bracing the counterweight with the circular comb.
  • additional through-openings for fastening the counterweight to the circular comb shaft results in the advantage that the clamping sections and the through-openings can be arranged symmetrically to one another and thus an even distribution of the fastening forces over the clamping sections is achieved.
  • the creation of additional through openings has the advantage of increasing the power transmission on divided crested shafts.
  • the geometric center of gravity of the balancing weight is arranged at a distance of 5 to 15 mm from the base of the depression on a side facing away from the circular comb shaft. It is advantageous if the center of gravity of the balancing weight is as close as possible to the comb shaft, in order to keep loads resulting from the acceleration forces as low as possible.
  • the position of the center of gravity can be influenced, for example, by the choice of material, an appropriate shape or an arrangement of cavities.
  • a combing machine with at least one combing device according to the above description is also proposed.
  • figure 1 shows a schematic side view of a combing device of a combing machine according to the prior art.
  • combers z. B. eight such combing devices arranged side by side.
  • the combing device has a nipper unit 1 which is mounted in a frame of the combing machine so that it can be pivoted back and forth about a nipper shaft 4 and a circular comb shaft axis 5 via pivot arms 2 and 3 .
  • the tong shaft 4 is driven by a drive, not shown in detail, in order to give the tong unit a reciprocating movement.
  • Arranged in the circular comb shaft axis 5 is a circular comb shaft 7 on which a circular comb 6 is fastened in a rotationally fixed manner.
  • the circular comb shaft 7 with its circular comb shaft axis 5 is also driven discontinuously by a drive (not shown) in the direction of rotation 22 .
  • the circular comb 6 fastened on the circular comb shaft 7 below the gripper unit 1 consists of a circular comb carrier 9 and a comb set 12 fastened to the circular comb carrier 9.
  • a counterweight 10 is arranged on a side of the circular comb carrier 9 opposite the circular comb shaft 7.
  • the attachment of the counterweight 10 is as shown schematically with screws 11, via which the counterweight 10 on the comb shaft 7 is attached.
  • the circular comb carrier 9 is braced by the circular comb shaft 7 with the counterweight 10 via fastening screws 8 and is thereby firmly connected to the circular comb shaft 7 .
  • the tong unit 1 is formed from a tong frame 13 to which a lower tong plate 14 and an upper tong plate 15 is attached.
  • the nipper unit 1 is closed, with the fiber tuft 16 protruding from the clamping point of the nipper unit 1 being grasped and combed out by the combing set 12 .
  • a feed roller 17 is rotatably mounted above the lower tong plate 14, which z. B. is driven step by step by a ratchet drive, not shown.
  • a batting 18 (or individual slivers) presented to the combing device is fed to the clamping point of the gripper unit 1 via this feed roller 17 .
  • the gripper unit 1 is pivoted in the direction of a subsequent pair of detaching rollers 19 .
  • the gripper unit 1 opens and the combed-out end of the cotton wool 18 or the tuft 16 is placed on the end of a previously formed fiber fleece 20 and soldered to it under the action of the clamping point of the detaching rollers 19 and transported away in the conveying direction 21.
  • the circular comb shaft 7 and thus also the circular comb carrier 9 with the combing set 12 and the counterweight 10 are accelerated in the direction of rotation 22 and in turn braked.
  • Such a combing process is carried out more than 600 times per minute in high-performance machines, and the acceleration forces are correspondingly high.
  • FIG 2 shows a schematic representation of a first embodiment of a balancing weight 10 according to the invention in a view and figure 3 in a side view from direction X to figure 2 .
  • the compensating weight 10 has a length 23 in its longitudinal direction 24.
  • the longitudinal direction 24 of the compensating weight 10 corresponds to the direction of a crested shaft axis 5, which is also shown for orientation, as well as a crested shaft 7 with a surface 27.
  • To the surface 27 of the crested shaft 7 the counterweight 10 is applied with a recess 30 directed against the circular comb shaft 7.
  • the counterweight 10 has a shape of an annular circular arc section with a section angle ⁇ , as a result of which the counterweight 10 covers a part of a circumference of the comb shaft 7 that corresponds to the section angle ⁇ .
  • the indentation 30 is provided on a side of the counterweight 10 facing the circular comb shaft. This is trapezoidal with a base 31 and two sloping surfaces 32, wherein the sloping surfaces 32, starting from the base 31, move away from each other, so that an outwardly directed, respectively towards the comb shaft 7, opening recess 30 results.
  • the two inclined surfaces 32 enclose an opening angle ⁇ .
  • the depression 30 has a depth 33 which is less than a third of a round comb shaft diameter 28 .
  • Clamping sections 34 are provided on the inclined surfaces 32 . In the embodiment shown, four clamping sections 34 are shown on each inclined surface 32 .
  • the clamping sections 34 are each arranged in pairs around a through-opening 26 , the clamping sections 34 of one inclined surface 32 lying opposite the clamping sections 34 of the other inclined surface 32 .
  • the clamping sections 34 have an extension 35 in the longitudinal direction 24 of the counterweight 10.
  • the through-opening 26 is arranged in a transverse direction 25 perpendicular to the base area 31 and is used to fasten the counterweight 10 to the circular comb shaft 7 (see figure 4 ).
  • the balancing weight 10 comes into contact with the clamping sections 34 when it rests on the circular comb shaft 7 with the surface 27 of the circular comb shaft 7 .
  • the depth 33 of the indentation 30 is selected such that a gap 36 remains between the surface 27 of the circular comb shaft 7 and the base area 31 of the indentation 30 when the balancing weight 10 is installed.
  • the recess 30 extends over the entire length 23 of the counterweight 10.
  • a through hole 29 is also shown, the position of which is arranged in the longitudinal direction 24 according to the circular comb (not shown) that is used.
  • the through hole 29 is arranged in a transverse direction 25 perpendicular to the base 32 and serves to brace the balancing weight 10 with the round comb arranged on a side of the balancing weight 10 opposite the round comb shaft 7 .
  • a geometric focus 37 of the counterweight 10 is arranged.
  • a position of the center of gravity 37 is adapted to a design of the circular comb 6 that is to be used.
  • the shape of the counterweight 10 can be designed accordingly or cavities in the counterweight 10 can also be designed.
  • FIG 4 shows an embodiment of a combing device according to the invention and figure 5 a cross-section at point AA figure 4 in a schematic representation.
  • the combing device shown has a circular comb 6 , a circular comb shaft 7 with a circular comb shaft axis 5 and a balancing weight 10 .
  • the circular comb 6 is provided with a circular comb carrier 9 resting on a surface 27 of the circular comb shaft 7 and carrying a combing set 12 .
  • the counterweight 10 and the circular comb 6 extend over a length 23 in a longitudinal direction 24 arranged parallel to the circular comb shaft axis 5.
  • the counterweight 10 is, viewed in a transverse direction 25, arranged opposite the circular comb 6 on the circular comb shaft 7.
  • the counterweight 10 is provided with a recess 30 extending over the entire length 23 .
  • the recess 30 is delimited by a base 31 and two inclined surfaces 32 .
  • Clamping sections 34 are provided in the inclined surfaces 32, through which the balancing weight 10 comes into defined contact with the surface 27 of the circular comb shaft 7 when it rests against the circular comb shaft 7 .
  • the balancing weight 10 is provided with through-holes 26 for attachment to the circular comb shaft 7 and with through-holes 29 for bracing with the circular comb 6 . Because in figure 4 only half of the combing device is shown in the longitudinal direction 24, the illustrated number of through-openings 26 and through-holes 29 and clamping sections 34 corresponds to half of the number actually provided in the embodiment shown.
  • the attachment of the balancing weight 10 to the comb shaft 7 is provided with screws 11 arranged in the through holes 26 .
  • the counterweight 10 is directed against the circular comb shaft 7 with the recess 30 brought to rest on the surface 27 of the circular comb shaft 7 and used with the screw 11 to the circular comb shaft 10 in such a way that in the area of the Clamping sections results in a non-slip connection between the circular comb shaft 7 and the counterweight 10 .
  • a gap 36 remains between the base surface 31 of the recess 30 and the surface 27 of the comb shaft 7. This ensures that contact between the inclined surfaces 32 of the recess 30 and the surface 27 of the comb shaft 7 can only occur in the area of the clamping sections 34 is defined.
  • the bracing of the circular comb 6 with the counterweight 10 takes place with fastening screws 8 which engage through the through bores 29 of the counterweight 10 and the circular comb shaft 7 and into the circular comb carrier 9 .
  • FIG 6 shows a schematic representation of a second embodiment of a balancing weight 10 according to the invention in one view.
  • the compensating weight 10 has a length 23 in its longitudinal direction 24.
  • the longitudinal direction 24 of the compensating weight 10 corresponds to the direction of a comb shaft axis 5, which is also shown for orientation.
  • the balancing weight 10 has a structurally identical shape to the balancing weight 10 of the first embodiment Figures 2 and 3 on.
  • Clamping sections 34 are provided on the inclined surfaces 32 . In the embodiment shown, two clamping sections 34 are shown on each inclined surface 32, with only one half of the counterweight 10 being shown.
  • the clamping sections 34 are arranged in pairs around through-openings 26 and a through-hole 29 , the clamping sections 34 of one inclined surface 32 lying opposite the clamping sections 34 of the other inclined surface 32 .
  • the clamping sections 34 have an extension 35 in the longitudinal direction 24 of the counterweight 10.
  • the second embodiment of the counterweight 10 has four through-openings 26 and four through-holes 29 over the entire length 23 of the counterweight 10. At least three through openings 26 and/or through bores 29 are arranged symmetrically to the clamping sections 34 .
  • the through openings 26 are used to attach the counterweight 10 to the comb shaft 7 (see figure 4 ).
  • the through holes 29, which are arranged in their position according to the applicable round comb (not shown) in the longitudinal direction 24 are used to brace the counterweight 10 with the on one of
  • Round comb shaft 7 opposite side of the counterweight 10 arranged round comb 6 (see figure 4 ).
  • the number and arrangement of the through-holes 29 can vary;

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)
EP23150967.0A 2022-01-28 2023-01-10 Contrepoids pour un dispositif de peignage d'une peigneuse Pending EP4219811A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH832022 2022-01-28

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EP4219811A1 true EP4219811A1 (fr) 2023-08-02

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EP23150967.0A Pending EP4219811A1 (fr) 2022-01-28 2023-01-10 Contrepoids pour un dispositif de peignage d'une peigneuse

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10163663A1 (de) 2001-12-21 2003-07-03 Rieter Ag Maschf Rundkamm für eine Kämmaschine
EP2426239A1 (fr) 2010-09-04 2012-03-07 Maschinenfabrik Rieter AG Peigne rond d'une peigneuse
CN207713870U (zh) * 2017-12-26 2018-08-10 上海敦孚机电科技有限公司 一种可拆分式锡林安装座装置
CN109023603A (zh) * 2018-10-30 2018-12-18 中原工学院 针对精梳锡林不同齿片组合的可调配重装置及配重方法
CN209537691U (zh) * 2019-01-22 2019-10-25 浙江锦峰纺织机械有限公司 一种新型棉精梳锡林

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10163663A1 (de) 2001-12-21 2003-07-03 Rieter Ag Maschf Rundkamm für eine Kämmaschine
EP2426239A1 (fr) 2010-09-04 2012-03-07 Maschinenfabrik Rieter AG Peigne rond d'une peigneuse
CN207713870U (zh) * 2017-12-26 2018-08-10 上海敦孚机电科技有限公司 一种可拆分式锡林安装座装置
CN109023603A (zh) * 2018-10-30 2018-12-18 中原工学院 针对精梳锡林不同齿片组合的可调配重装置及配重方法
CN209537691U (zh) * 2019-01-22 2019-10-25 浙江锦峰纺织机械有限公司 一种新型棉精梳锡林

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