WO1995000686A1 - Dispositif permettant d'amener une nappe jusqu'a la tete d'une peigneuse - Google Patents

Dispositif permettant d'amener une nappe jusqu'a la tete d'une peigneuse Download PDF

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Publication number
WO1995000686A1
WO1995000686A1 PCT/CH1994/000122 CH9400122W WO9500686A1 WO 1995000686 A1 WO1995000686 A1 WO 1995000686A1 CH 9400122 W CH9400122 W CH 9400122W WO 9500686 A1 WO9500686 A1 WO 9500686A1
Authority
WO
WIPO (PCT)
Prior art keywords
cotton
drive roller
roll
cotton roll
circumference
Prior art date
Application number
PCT/CH1994/000122
Other languages
German (de)
English (en)
Inventor
Helfried Lang
Raphael Wicki
Original Assignee
Maschinenfabrik Rieter 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 Maschinenfabrik Rieter Ag filed Critical Maschinenfabrik Rieter Ag
Priority to EP94917538A priority Critical patent/EP0656078B1/fr
Priority to DE59400899T priority patent/DE59400899D1/de
Publication of WO1995000686A1 publication Critical patent/WO1995000686A1/fr

Links

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 invention relates to a device for feeding a cotton tape from a cotton roll, for the formation of which the cotton tape is wound onto a winding tube, to a combing head of a combing machine, with a rotatable drive roller and with Support means for rotatably holding the cotton roll with an axis parallel to the axis of the drive roller such that the circumference of the cotton roll is in contact with the circumference of the drive roller while the cotton tape is being unwound.
  • the combing heads of known combing machines each contain an oscillating pliers in which an intermittently rotating feed cylinder is mounted.
  • a cotton tape is fed to the feed cylinder from a device of the type specified at the outset.
  • the pliers are closed, the front edge of the cotton tape is combed out by a rotating circular comb.
  • the pliers are then opened and the combed fiber beard is torn off the cotton wool by a tear-off device and connected to the end of the comber belt previously formed from the combed material.
  • the means for rotatably holding the cotton roll contain a second roller which is arranged horizontally at a distance from and parallel to the drive roller.
  • the second roller can be driven in the same way as the drive roller.
  • the circumference of the wad of cotton is placed on the two rollers.
  • the drive roller is rotated at a peripheral speed which is synchronized with the movements of the parts of the combing head described above.
  • the aim is to ensure that the cotton roll always has the same length of cotton tape for each reciprocating movement of the pliers or for each revolution of the circular comb.
  • the aim of this was to ensure that the comber belt emitted by the combing head always has a constant strength.
  • the strength of the combing machine belt or the weight of the belt per meter of belt length at the beginning of the unwinding of the cotton band is greater from a full cotton roll than towards the end of the unwinding when the cotton roll becomes smaller.
  • the deviation which is generally referred to as drift, can be up to 5% depending on the structure of the cotton roll, material and other parameters.
  • the aim of the invention is to reduce the size of the drift described above. It is assumed that the drift in known devices is caused, at least in part, by the fact that the diameter and thus the weight of the cotton roll resting on the drive roller and the second roller gradually decrease as the cotton tape is unwound.
  • the weight of a full wad of cotton can be about 20 to 25 kg, while the empty winding tube only weighs about 4 kg. Because of the elastic resilience of the wadding, indentations occur in the area of the wadding roll resting on the two rolls in the wadding roll, by means of which the distance from the circumference of the drive roll to the axis of the wadding roll becomes smaller than the free outer radius of the wadding roll.
  • the depth of the indentation points is of course dependent on the weight of the cotton wrap.
  • the drive roller is generally fluted, and the depth of penetration of the cotton into the flutes is in turn dependent on the weight of the cotton roll. The weight loss of the reel during unwinding can also have an impact on the drive system.
  • the inventive device of the type mentioned above, with which the set goal can be achieved is characterized in that the drive roller and at least one element of the support means are movable with respect to one another during the unwinding of the cotton tape in the sense that when the diameter and the weight of the cotton roll against this decrease an equalization of the contact force between the cotton roll and the drive roller is achieved.
  • the support means can contain at least one element which can be inserted into the inside of the winding tube in order to bear at least part of the weight of the cotton roll and / or to exert an additional loading force on the roll. Then only the drive roller has to be in contact with the circumference of the cotton roll, which has the advantage that the cotton layers shed less and become matted than when the cotton roll was placed on two rolls. If desired, however, it is also possible to use two drive rollers which are in contact with the circumference of the cotton roll.
  • the element or the elements which can be inserted into the winding sleeve and the drive roller must of course be movable with respect to one another, so that during the unwinding of the cotton tape, the diameter of the cotton roll gradually decreasing, the circumference of the cotton swab with the circumference the drive roller remains in contact.
  • a force load (by springs and / or by weights) could then act on the bearings of the drive roller, which ensures that, given the decreasing diameter of the cotton roll, the force with which the drive roll is pressed against the circumference of the cotton roll is not strong changes (e.g. by less than ⁇ 10%).
  • the cotton tape is detached from the cotton roll immediately after the drive roller, and so that this detachment point always remains at approximately the same location, it is then preferable to store the drive roller fixed to the frame. In such a case, the element or would be
  • Elements which can be inserted into the winding tube are preferably rotatably mounted on bearing elements which are perpendicular to the axis of the drive roller with respect to the drive roller Directions are movable. These bearing elements would preferably be guided and / or subjected to force such that during the unwinding of the cotton tape, with the diameter of the cotton roll becoming smaller and the weight of the cotton roll decreasing from 100% to, for example, less than 25%, the force with which the circumference of the wadding roll is pressed against the circumference of the drive roller by less than ⁇ 20%, preferably less than ⁇ 10%.
  • FIG. 1 is a schematic side view of parts of a combing head of a combing machine with a device for feeding a cotton tape
  • FIG. 2 is a view of the said device seen from the right in Fig. 1, partly in section,
  • FIG. 3 shows a graphical representation of the force with which the wadding is applied to the drive roller in the device according to FIGS. 1 and 2,
  • FIG. 4 in a side view similar to FIG. 1, a second embodiment of the device according to the invention, FIG. 5 again in a view similar to a third embodiment,
  • Fig. 6 also in a similar view, a fourth embodiment and Fig. 7 again in a similar view, a fifth embodiment.
  • a combing head of a combing machine contains a rotating circular comb 1 and two pairs of tear-off cylinders 2, 3, all of which are mounted in a machine frame 4, and a reciprocating pliers 5 in which an intermittently rotating feed cylinder 6 is stored.
  • a cotton tape W is fed to the feed cylinder 6 and is unwound from a cotton roll 7.
  • the pliers 5 are closed, the front edge of the cotton tape W is combed out by the circular comb 1. Then the pliers 5 are opened, as shown, and the combed chamfer is torn off from the cotton tape W by the tear-off cylinders 2, 3 and connected to the end of the comber tape, which was previously formed from combed material.
  • the cotton roll 7 consists in the usual way of a winding tube 8 and the cotton tape, which is wound on the winding tube.
  • the cotton roll 7 is rotated by a drive roller 9 which is rotatably mounted in the machine frame 4 and whose circumference is in contact with the circumference of the cotton roll 7.
  • the drive roller 9 is driven synchronously with the combing tools of the combing head, in particular with the rotary tool 1, the tear-off cylinders 2, 3, the tongs 5 and the feed cylinder 6.
  • the cotton roll 7 is held with an axis of support means parallel to the axis of the drive roller 9 such that the circumference of the cotton roll 7 is in contact with the circumference of the drive roll 9 while the cotton tape W is being unwound.
  • the support means contain two coaxial support pins 10 and 11, which are inserted into the ends of the winding tube 8 during operation and carry part of the weight of the cotton bobbin 7.
  • the trunnions 10 and 11 are rotatably mounted on arms 12 and 13, respectively, which are fixed around a frame
  • a axis are pivotable.
  • the arms 12 and 13 carry journals 12.1 and 13.1, respectively, which are mounted in the machine frame 4.
  • the axis A of the journals 12.1 and 13.1 runs parallel to the axis of the drive roller 9, so that the arms 12 and 13 and thus the support pins 10 and 11 can be moved with respect to the drive roller 9 in directions perpendicular to the axis thereof.
  • the length of the arms 12 and 13, measured from the axis A to the axis of the support pins 10 and 11, are selected such that while the cotton tape is being unwound, the diameter of the cotton roll 7 becomes smaller and the weight of the cotton roll decreases from 100% to less than 25%, the force with which the circumference of the bobbin 7 rests on the circumference of the drive roller 9 'changes by less than ⁇ 20%.
  • a full cotton wrap 7 is shown with solid lines, which have a weight of 100%.
  • the arms 12 and 13 are relatively steep.
  • the weight of the full wadding 7 generates a torque about the axis A, which is given by the size of the weight and the horizontal distance between the axis A and the axis of the trunnions 10 and 11.
  • there is a small torque which Weight of the arms 12 and 13 and the parts carried by them.
  • the cotton roll 7 rests on the drive roller 9 with a force which generates a counter torque about the axis A, which is equal to the sum of the torques mentioned above.
  • Fig. 3 shows the size of the contact force F (in Newtons) depending on the diameter d (cm) of the cotton roll 7 for an arrangement according to FIGS.
  • the diameter of the full cotton roll is 60 cm
  • the mass of full wadding, with the winding sleeve 8 24 kg (20 kg cotton tape + 4 kg mass of the empty winding sleeve)
  • the diameter of the empty winding sleeve is 20 cm
  • the axis A from the axis of the drive roller 9 a horizontal distance of 35 cm and 6 cm lower than the axis of the drive roller 9.
  • the length of the arms 12 and 13, from the axis A to the axis of the support pins 10 and 11, is 24 cm
  • the mass of the arms 12 and 13 is 3 , 8 kg.
  • the two trunnions 10 and 11 are preferably axially movable with respect to each other, so that they for
  • Replacing the cotton roll that is, for removing the empty winding tube 8 (after the cotton tape W has been completely unwound) and inserting a new full cotton roll 7, can be pulled out of the ends of the winding tube 8.
  • one of the arms 12 and 13, or both arms can be axially displaced on the bearing journal 12.1 or 13.1 (or with these bearing journal).
  • a pneumatic cylinder 14 can be arranged between the two arms 12 and 13, which can be actuated to move the arms 12 and 13 away from one another when the support pins 10 and 11 are to be withdrawn from the winding tube 8. After pulling back the trunnions, the empty winding tube 8 can then be removed. Then a new wadding 7 can be lowered between the trunnions 10 and 11.
  • the new wad of cotton lies first on the drive roller 9 and on a storage rod 15 arranged between the arms 12 and 13.
  • the support pins 10 and 11 are conical, as shown in Fig. 2, so that they now by axially moving the arms 12 and 13 - by means of the pneumatic cylinder 14 and / or by means of a tension spring 16 arranged between the arms 12 - in the ends of the Winding sleeve 8 of the new wadding are introduced can.
  • the conical trunnions 10 and 11 slightly lift the wadding 7 from the support rod 15.
  • the force with which the circumference of the cotton roll is pressed against the circumference of the drive roller should preferably decrease by less than ⁇ 20% and expediently by less than when the diameter and weight of the cotton roll decrease while the cotton tape is being unwound Change ⁇ 10%.
  • this is essentially achieved solely by the geometrical arrangement of the pivot axis A of the arms 12 and 13 with respect to the drive roller 9 and the length of these arms 12 and 13.
  • the elements carrying the trunnion could also be loaded with pneumatic or hydraulic cylinders, and in such a case the magnitude of the load during the unwinding of the cotton tape could be regulated in such a way that the pressing force of the cotton roll against the drive roller remains approximately constant.
  • the contact pressure could be measured directly, e.g. with force transducers arranged on the bearings of the drive roller.
  • FIG. 4 schematically shows an embodiment of the device according to the invention, in which the elements carrying the trunnions for the wadding roll are loaded with additional weights.
  • FIG. 4 again shows a cotton roll 17 which is in contact with a drive roller 19 mounted in the machine frame, not shown. During operation, part of the weight of the cotton roll 17 is carried by support pins 20 inserted into the ends of the winding sleeve of the cotton roll.
  • the elements supporting the trunnions 20 are also arms 22 which are pivotable about an axis A on Machine frame are stored.
  • the support pins 20 are rotatably mounted on the arms 22.
  • the arms 22 are force-loaded with additional weights 24 which are attached to arms 22.1 rigidly connected to the arms 22.
  • the gravity acting on the additional weights 24 exerts an additional torque on the arms 22, which presses the cotton roll 17 against the drive roller 19.
  • the size and position of the additional weights 24, the position of the pivot axis A with respect to the drive roller 19 and the length of the arms 22 are selected such that while the cotton tape is being unwound, the diameter of the cotton roll 17 becomes smaller and the weight of the cotton roll decreases from 100% to less than 25%, the force with which the cotton roll 17 is pressed against the drive roller 19 changes by less than ⁇ 20%.
  • the support pins 20 with the empty winding tube are pivoted into a left end position 20.1 shown with broken lines.
  • the combing machine is then switched off.
  • the arms 22 with the support pins 20 can now - by hand or by means of a suitable drive - be pivoted into a right end position 20.2, also shown with broken lines, in which the support pins hold the empty winding tube over a tube tray 25.
  • the empty tube is then placed on the tube tray 25.
  • the arms 22 are then pivoted back into the position shown by solid lines and a new full wadding 17 is inserted between the trunnions 20, after which the combing machine can be put into operation again.
  • FIG. 5 shows a further embodiment of the device according to the invention, in which the elements carrying the support pins for the cotton wrap are force-loaded with springs.
  • the elements carrying the support pins for the cotton wrap are force-loaded with springs.
  • a cotton roll 27 which is in contact with a drive roller 29 mounted in the machine frame, not shown here.
  • support pins 30 which carry the cotton roll.
  • the elements carrying the support pins 30 are sliding pieces 32, which are slidably guided on inclined guide rails 34 arranged fixed to the frame.
  • the support pins 30 are rotatably mounted on the sliders 32.
  • One end of a tension spring 35 engages on the sliders 32, the other end of which is anchored to an element 36 fixed to the frame.
  • the springs 35 pull the sliders 32 and thus, via the support pins 30, the wadding roll 27 obliquely upwards against the action of gravity along the guide rails 34, as a result of which the circumference of the wadding roll 27 is pressed against the circumference of the drive roller 29.
  • the diameter of the cotton roll 27 gradually becomes smaller, and at the same time the weight of the cotton roll decreases accordingly.
  • the tension springs 35 are shortened, as a result of which the tensile force exerted on the sliding pieces 32 decreases.
  • the inclination of the guide rails 34 against the horizontal, the spring constant of the tension springs 35 and the length thereof or the position of the anchoring elements 36 fixed to the frame with respect to the axis of the drive roller 29 are selected such that during the unwinding of the cotton tape W, the through Knife of the cotton roll 27 becomes smaller and the weight of the cotton roll decreases from 100% to less than 25%, the force with which the cotton roll is pressed against the drive roller 29 changes by less than ⁇ 20%, preferably by less than ⁇ 10%.
  • the support means which hold the cotton lap in such a way that it is in contact with the drive roller while the cotton tape is being unwound, each contain the two trunnions which are in operation are inserted into the ends of the winding tube of the cotton swab. Only the one drive roller is in contact with the circumference of the cotton roll.
  • This has the advantage that the cotton wool is less hairy and matted than with Wadding roll placed on two rollers.
  • the support pins can fix the axial position of the cotton roll, so that the cotton tape always runs in the middle of the pliers of the combing head.
  • the support means for the cotton roll contain two support rollers, on which the cotton roll rests. In such embodiments, a drive roller separate from the support rollers would be used for rotating the wadding roll
  • Carrier rollers can be moved in order to achieve a uniform contact force between the cotton roll and the drive roller as the diameter and weight of the cotton roll decrease.
  • An embodiment of this type is shown schematically in FIG. 6.
  • FIG. 6 again shows a cotton roll 37, which consists of a winding tube 38 and a cotton tape wound on the winding tube.
  • the support means for the cotton roll 37 contain two parallel support rollers 40 and 41, on which the cotton roll rests.
  • the support rollers 40 and 41 are rotatably mounted in the machine frame, which is again not shown here.
  • a drive roller 39 parallel to the support rollers 40 and 41 is rotatably and drivably mounted on levers 42, which are pivotable about an axis 43 fixed to the frame.
  • the bearings of the drive roller 39, ie the levers 42, are force-loaded in order to press the drive roller against the circumference of the cotton roll 37.
  • the levers 42 are designed with two arms, and the force loading of the levers is generated by weights 44 which are fastened to the ends of the levers 42 remote from the drive roller 39.
  • This force loading of the levers 42 pushes the drive roller 39 against the circumference of the cotton roll 37 with a force which is largely independent of the diameter (and weight) of the cotton roll.
  • the force loading of the levers 42 carrying the drive roller 39 could also be generated with springs instead of or in addition to the weights 44.
  • Fig. 7 shows schematically an embodiment of the invention with trunnions, the supporting elements of which are loaded with pneumatic or hydraulic cylinders.
  • a cotton roll 47 is in contact with a drive roller 49, which is rotatably mounted in the machine frame (not shown).
  • the wadding roll 47 is held in the operation of support means, which include, on the one hand, support pins 50 inserted into the ends of the winding sleeve of the wadding roll and, on the other hand, a support roller 53 mounted in the machine frame, on which the wadding roll 47 rests with its circumference.
  • the support roller 53 can be driven in the same way as the drive roller 49 " .
  • the support pins 50 are rotatably mounted on arms 52 which are connected to piston rods 54 of hydraulic or pneumatic cylinders 55 and are displaceable with these piston rods.
  • a valve device 56 permits this Supply of a pressure medium with an adjustable pressure optionally in one or the other end of the cylinder 55.
  • the valve device 56 is controlled by a control device 57 such that the forces exerted by the support pins 50 in the upward or downward direction on the Cotton rolls 47 are exercised, together with the weight of the cotton roll result in an approximately constant contact force of the cotton roll on the drive roller 49 and the support roller 53.
  • the weight of the cotton roll 47 gradually becomes smaller, and in accordance with this decrease in weight
  • the control device 57 reduces the upward movement of the trunnions 50 onto the wa force applied 47 (and / or increases the downward force
  • the control device 57 can be a program control device which controls the forces according to a predetermined program.
  • the control device 57 can also control the forces as a function of the diameter of the cotton winder 47.
  • a position transmitter (not shown) could, for example, determine the position of the piston rods 54 and emit a corresponding signal to the control device 57.
  • the contact force could be measured with force transducers (not shown) arranged on the bearings of the rollers 49 and 53, and the control device could then compare the output signals of the force transducers with a setpoint signal and keep the contact force practically constant.

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

Abstract

La nappe (W) à acheminer jusqu'à la tête (1, 2, 3, 5, 6) de la peigneuse est dévidée d'un rouleau de nappe (7). Le rouleau (7) contient un mandrin (8) sur lequel la nappe est enroulée. Le dispositif comprend des supports (10, 12) pour maintenir le rouleau de nappe (7) de façon qu'il puisse tourner, que son axe soit parallèle à un rouleau entraîneur (9) et que sa périphérie soit en contact avec ledit rouleau entraîneur (9). Pendant le dévidage, le rouleau entraîneur (9) et au moins un élément des supports (10, 12) effectuent un déplacement relatif par rapport à la nappe (w), de manière à arriver à équilibrer la force de contact entre le rouleau de nappe (7) et le rouleau entraîneur, en dépit de la diminution graduelle du poids du rouleau de nappe (7) et en fonction de cette diminution, ce qui permet à la périphérie du rouleau de nappe (7) d'appuyer avec une pression approximativement constante sur le point de contact. Ce dispositif permet d'éviter que la quantité de nappe dévidée du rouleau de nappe (7) à chaque tour du rouleau entraîneur (9) diminue graduellement pendant le dévidage.
PCT/CH1994/000122 1993-06-21 1994-06-20 Dispositif permettant d'amener une nappe jusqu'a la tete d'une peigneuse WO1995000686A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP94917538A EP0656078B1 (fr) 1993-06-21 1994-06-20 Dispositif permettant d'amener une nappe jusqu'a la tete d'une peigneuse
DE59400899T DE59400899D1 (de) 1993-06-21 1994-06-20 Einrichtung zum zuführen eines wattebandes zu einem kämmkopf einer kämmaschine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1850/93-3 1993-06-21
CH185093 1993-06-21

Publications (1)

Publication Number Publication Date
WO1995000686A1 true WO1995000686A1 (fr) 1995-01-05

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ID=4220070

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CH1994/000122 WO1995000686A1 (fr) 1993-06-21 1994-06-20 Dispositif permettant d'amener une nappe jusqu'a la tete d'une peigneuse

Country Status (4)

Country Link
EP (1) EP0656078B1 (fr)
CN (1) CN1111063A (fr)
DE (1) DE59400899D1 (fr)
WO (1) WO1995000686A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107326481A (zh) * 2017-07-16 2017-11-07 经纬纺织机械股份有限公司 一种单眼光电检测棉条断条的装置及其应用的精梳机

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006024555B4 (de) * 2006-05-23 2012-04-05 Oerlikon Textile Gmbh & Co. Kg Kämmmaschine mit Reservewickelmulde
EP2783888B1 (fr) * 2013-03-26 2016-11-02 Inalfa Roof Systems Group B.V. Ensemble store à enrouleur

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB340686A (en) * 1929-11-04 1931-01-08 Percy Clough Improvements relating to noble's combing machines
DE3935657A1 (de) * 1989-10-26 1991-05-02 Zinser Textilmaschinen Gmbh Zufuehreinrichtung fuer eine kaemmaschine
EP0455171A1 (fr) * 1990-05-02 1991-11-06 Maschinenfabrik Rieter Ag Machine textile

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB340686A (en) * 1929-11-04 1931-01-08 Percy Clough Improvements relating to noble's combing machines
DE3935657A1 (de) * 1989-10-26 1991-05-02 Zinser Textilmaschinen Gmbh Zufuehreinrichtung fuer eine kaemmaschine
EP0455171A1 (fr) * 1990-05-02 1991-11-06 Maschinenfabrik Rieter Ag Machine textile

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107326481A (zh) * 2017-07-16 2017-11-07 经纬纺织机械股份有限公司 一种单眼光电检测棉条断条的装置及其应用的精梳机
CN107326481B (zh) * 2017-07-16 2023-08-08 经纬智能纺织机械有限公司 一种单眼光电检测棉条断条的装置及其应用的精梳机

Also Published As

Publication number Publication date
DE59400899D1 (de) 1996-11-28
EP0656078A1 (fr) 1995-06-07
EP0656078B1 (fr) 1996-10-23
CN1111063A (zh) 1995-11-01

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