CN115803485A - Method and comber for operating a comber for textile preparation - Google Patents

Abstract

The invention relates to a method for operating a combing machine (100) for textile preparation having a rotary driven circular comb roll (1) through which fiber bundles (10) pass in a periodic sequence Guided so that the fiber bundles are combed out, the combing machine also has an upper nipper (2) and a lower nipper (3), by which the fibers to be combed are clamped in a periodic sequence. the fiber bundle (10) and release it again, the combing machine additionally has a rotationally driven front detaching roller (4) and a rotationally driven rear detaching roller (5), wherein the detaching rollers (4, 5) With inversion points ( U1 , U2 ), they rotate back and forth in a Pilgering motion, and wherein the fiber bundles ( 10 ) are separated in periodic sequence at least by means of the front separating roller ( 4 ). According to the invention, said rear detaching roller (5) is rotationally driven in a phase (P2) between said inversion points (U1, U2) of said front detaching roller (4) being rotationally driven After the phase (P1) of the

Description

Method and comber for operating a comber for textile preparation

technical field

The invention relates to a method for operating a combing machine for textile preparation, the combing machine having circular comb rollers driven in rotation, by means of which the fiber bundles are guided in a periodic sequence for the carding of the fiber bundles, the comber The comb also has an upper nipper and a lower nipper, by means of which the fiber bundles to be combed are clamped in periodic sequence and released again, the comber also has a rotary-driven front detaching roller and a rotationally driven rear detaching roller, wherein the detaching roller rotates back and forth in a Pelgerian motion with an inversion point, and wherein the fiber bundles are separated in periodic sequence at least by means of the front detaching roller.

Background technique

For example, it is known from DE 10 2012 011 030 A1 to form a combing machine of this type for textile preparation, and the front detaching roller and the rear detaching roller are driven by a common control transmission, wherein a first motor for continuous rotary motion is used for driving and a second motor for superimposed, discontinuous rotational motion in order to produce the pilgering motion. For this purpose, the separating rollers are driven via the planetary gear and are rigidly connected in their rotational phases on the output side of the planetary gear, so that both separating rollers likewise carry out a correspondingly strong acceleration of the rotational movement and hysteresis. Some large rotational accelerations are generated by the pilgering motion, which are not transformed into each other due to the synchronous rotational movement of the rollers, resulting in a huge energy requirement to run the detaching rollers in the combing head of the combing machine synchronously in the pilgering motion .

Known from EP2444534B1 is a method for running a combing machine for textile preparation, in which it is proposed that, by virtue of the application of a control unit with a computing unit and an input unit, the separation roller is set up in as simple a manner as possible and by giving decentralized fixed points Motion curves in time. After inputting the discrete inversion points and the intervening auxiliary points, a corresponding Pilgerian movement can be carried out by controlling the servomotor as required by the course of the curve.

However, the decoupling rollers are driven and hysteresised at a constant high acceleration, so that also by means of the programming of the auxiliary points already described in the Pilgering movement, a constant high energy requirement is generated during the operation of the combing machine.

Contents of the invention

The object of the present invention is to further improve the operation of the combing machine by reducing the energy requirement of the combing machine. The length exerted on the carded fiber bundle in time units should be kept as constant as possible here.

The object is solved starting from the method according to the preamble of claim 1 in combination with the indicated features. Advantageous variants of the invention are given in the dependent claims.

The technical teaching encompassed by the invention consists in driving the rear detaching roller in rotation in a phase which is behind the phase of the rotationally driven front detaching roller between the reversal points of the Pilgering movement.

The separation process for separating the fiber bundles is carried out only or mainly by the front separating roller, wherein, in order to guide the fiber bundles and also exert at least part of the force on the fiber bundles, especially when the fiber bundles are joined together The rear separation roller comes in handy. The situation in which the fiber bundles are spliced together is called so-called splicing. An additional rear separating roller is therefore essentially necessary in order to consolidate the fiber bundles which are joined together again in the joining position by the fact that the fiber bundles traverse the rear separating roller in a Pilgering motion likewise several times.

If the rear detaching roller is run at least in stages with relatively small changes in the rotational speed over time and according to the invention is run slower in a certain way between the reversal points, this means that an energy saving can be achieved thereby. The reason for this is the less "sharp" reversing movement and the "softer" speed change of the rollers before and after the reversing point. The phases of the detaching rollers then again coincide at the reversal point, whereas the front detaching rollers experience a greater change in rotational speed per time unit than the rear detaching rollers, especially with reference to the course of the curve before and after the reversal point. Energy can thereby be saved by a less energy-intensive operation of the rear separation roller, in particular also by operation of the motor close to the ideal operating point.

It is advantageous if the rear detaching roller runs with a maximum rotational acceleration between the reversal points which is lower than the maximum rotational acceleration of the front detaching roller. In other words, the curve of the phase of the rear separating roller of the phase angle has a smaller slope over time than the curve of the phase of the front separating roller. In particular, the maximum slope of the curve of the phase of the front separating roller is greater than the maximum slope of the curve of the phase of the rear separating roller.

As a result, the rotational speed of the rear detaching roller changes per time unit less than the rotational speed change of the front detaching roller per time unit before and/or after a phase period through the reversal point.

According to a further advantageous embodiment of the method according to the invention, the front detachment roller and the rear detachment roller are driven independently of one another by means of motor drives. This results in the advantage that a control unit can be provided by means of which the motor drives of the front separating roller and the rear separating roller can be controlled separately from each other. It is particularly advantageous if the motorized drive of the front detaching roller and the motorized drive of the rear detaching roller are not connected by means of a transmission. Another advantage is that the motor drive of each decoupling roller is decoupled from the drives of the remaining rotating components of the combing machine. These separating rollers can include rotational angle sensors by means of which the rotational position of the rollers can be transmitted at any time to the control unit in order to control the rollers accordingly by means of a phase control loop. In particular, the decoupling roller can itself be formed by the rotor of the electric motor or be connected in a rotationally fixed manner to the rotor of the electric motor, so that it can be controlled electrically alone and, in particular in an electrical control circuit, can follow very dynamic curves of the phases of the decoupling roller.

According to an important aspect of the invention, the phase of the rear detaching rollers deviates from the phase of the front detaching rollers, so that the segments of the fiber bundles form loops recurring in periodic sequence between the detaching rollers. The ring can also form an otherwise straight run of the fiber bundle here, and to a certain extent acts as an abstract form of the ring, but wherein the fiber bundle has no tensile stress in the section between the detaching rollers, or wherein, as long as If the tensile force is essentially ≥0, then the tensile stress in the fiber bundle between the detaching rollers occurs pulsatingly as a repetitive tensile fatigue force. Due to the deviating phase of the rear detaching rollers, however, loops of the fiber bundle are formed preferably at least to a lesser extent between the detaching rollers, which loops are already present when the fiber bundle no longer forms a straight line between the detaching rollers.

The motor drive of the rear detaching roller operates with a lower average power and/or with a lower maximum power during the Pilgering cycle than the motor drive of the front detaching roller. This results in a smaller overall necessary energy requirement, wherein the front detaching roller must observe the technologically necessary phases in order to make the combing program and the combing head according to the combing machine for each combing cycle (Kammspiel) The separation process, combing out and engagement process of the phases of the other rotating parts remains coordinated.

The invention also relates to a combing machine for textile preparation, which has a control unit, by means of which the combing machine can be operated according to the method described above. The combing machine has, in particular, a first motor drive and a second motor drive, and the first motor drive drives the front detachment roller, and the second motor drive drives the rear detachment roller, wherein the motor drives form The components are separated from each other and can be controlled by the control unit of the comber.

Description of drawings

Further measures for improving the invention will be presented below together with the description of preferred exemplary embodiments of the invention and with the aid of the drawings.

In the picture:

Figure 1 shows a schematic view of a combing machine according to the prior art,

Fig. 2 shows a view according to the combing machine of Fig. 1 with features according to the invention, and

FIG. 3 shows a diagram representing the course of the phase of the front detaching roller and the phase of the rear detaching roller over time.

Detailed ways

Fig. 1 and Fig. 2 show respectively the combing machine 100 in the combing head area, show all the features of the combing head according to Fig. 1 of the prior art and show all the features of the combing head according to Fig. described together in the text.

The combing machine 100 according to FIGS. 1 and 2 is shown as a combing head for combing out a fiber bundle 10 , which can likewise be referred to as a fiber web or cotton. The fiber bundle 10 is stored in a fiber reel 17 or in an uncarded state in a can (not shown), and the fiber reel 17 is accommodated on two winding rollers 18 , 19 . As a result, the fiber lap 17 is unwound by the rotation of the winding rollers 18, 19 and conveyed to the combing head.

Firstly, the fiber bundle 10 passes through the feeding cylinder 11, and then is transported to a nipper device including an upper nipper 2 and a lower nipper 3. The upper nipper 2 and the lower nipper 3 release the fiber bundle 10 in the open state of the nippers 2 , 3 and the fiber bundle can move outwards through the front delivery side of the nipper arrangement. In the illustrated phase of the comber 100, the fiber tow 10 enters the front detaching roller 4 directly, by separating the fiber tow 10 to a certain extent between the detaching roller 4 and the counter detaching roller 15. Clamping, the fiber bundle 10 is finally guided between the front detaching roller 4 and the front counter detaching roller 15 .

During the further course of the fiber bundle 10 , the fiber bundle this time enters a further rear detaching roller 5 and is clamped between the rear detaching roller 5 and the rear counter-detaching roller 16 . For further use, the fiber bundle 10 then enters the pair of delivery rollers 20 and is thereby transported onward, for example for further processing in a draw frame.

In order to control the upper nipper 2 and the lower nipper 3 accordingly in their movement, a nipper arm 12 is provided, on which the lower nipper 3 is hinged and which is mounted on the On the nipper shaft 13 of periodic reciprocating motion. The upper nipper 2 is likewise driven movable here in a manner not shown and releases the fiber bundles 10 in the phases shown of the combing heads. If the front intersection of the pair of nippers 2, 3 moves away from the front detaching roller 4 to the left in the plane of the drawing so that the combing head is moved back, the fiber bundle is separated briefly before the front detaching roller 4. is separated, and another section of the fiber bundle 10 is released by the feeding cylinder 11 . The fiber fleece released in this way reaches the retreat position of the combing head with its free length through the circular comb roller 1 driven by rotation, and the circular comb arc section 14 present on the circular comb roller 1 can be combed out The fiber fleece. The combing head then moves again to the left towards the detaching rollers 4, 5, which in this phase move the combed fiber bundle 10 back a section towards the nippers 2, 3 so that a new The carded fiber bundles can be spliced together with the fiber bundles returning from the front detaching roller 4 .

The fiber fleece combed out by the circular comb segment 14 is placed in an overlapping manner on the end section of the returned fiber bundle 10 and drawn into the first The clamping position where the front separation roller 4 is connected with the front pair separation roller 15. The separating rollers 4 , 5 then rotate forward at a greater angle, so that a larger section of the fiber bundle 10 is guided towards the pair of delivery rollers 20 .

In this regard, the detaching rollers 4, 5 must first be turned back by a preset phase angle in each combing cycle, and then be turned forward again by another larger preset phase angle, so as to The preceding rotation conveys the fiber bundle 10 to the delivery roller pair 20. This movement is called the Pilgrim movement.

According to the prior art shown in FIG. 1 , there is provided a drive unit 9 which jointly drives the detaching rollers 4 , 5 in phase. The operation of the rollers can be carried out by means of a first motorized drive which transmits a continuous rotation into the roller drive and a second motorized drive which superimposes the discontinuous rotational movement on the already continuous Driven transmissions, for example embodied as planetary gears. This produces a Pilgerian movement that can be varied by different actuation of the electric drive.

According to the invention shown in FIG. 2 , each detaching roller 4 , 5 has a separately assigned motorized drive 6 , 7 and said motorized drive 6 only drives said front detaching roller 4 , said second The motorized drive 7 only drives the rear detaching roller 5 . The pair of detaching rollers 15, 16 rotate together by contact with the driven detaching rollers 4, 5.

A control unit 8 is used to control the motor drives 6 , 7 , which can have an input/output interface in a manner not shown further, so that the operator can control the corresponding Peel formats via the control unit 8 . Movement is programmed.

According to the invention, the rear detaching roller 5 is rotationally driven in a phase following that of the rotationally driven front detaching roller 4 . Thereby a ring S can be formed between the detaching rollers 4, 5, which ring S is formed by the fiber bundle again running straight between the detaching rollers 4, 5, especially when a low tensile stress is applied. Each combing cycle is drawn out of the fiber bundle 10 and the loop S is reconstructed in the subsequent combing cycle. The ring S is here always formed between the inversion points of the phase course of the rotary movement of the detaching rollers 4 , 5 , wherein, compared to the rear detaching roller 5 , between the inversion points The front detaching roller 4 is operated with greater angular acceleration. As a result, the section of the fiber bundle 10 which passes the front detaching roller 5 is larger than the section of the fiber bundle 10 which is guided by the rear detaching roller 5 .

However, it is also conceivable to drive the front detaching roller 4 and the rear detaching roller 5 by means of a common transmission, and to generate differences by means of a rigid or, in certain cases, manual or automatic variable transmission connection between them. The rotation phase trend of .

FIG. 3 shows a diagram representing the variation of the angle of rotation of the detaching rollers 4 , 5 over the operating time t in milliseconds. The phases P1 , P2 show the typical course of a Pilgering movement, in particular formed with reversal points U1 , U2 , only one combing cycle being shown. The continuity of the combing cycle causes the angles of rotation α1 , α2 to continue to rotate continuously, so that the course of the curve always continues upwards in a definite cascade.

The diagram shows the deviation of the phases P1, P2 of the rotational movement of the detaching rollers 4, 5 over time t, wherein the phase P1 describes the temporal phase course of the front detaching roller 4 and the phase P2 describes The temporal phase behavior of the post-separating roller 5.

After passing through the first inversion point U1, it can be seen that the phases P1, P2 of the front and rear separating rollers 4, 5 deviate from each other. The offset is formed such that the maximum change in the rotational speed of the rear detaching roller 5 per time unit is smaller than the maximum rotational speed change per time unit of the front detaching roller 4 . This saves energy for operating the rear detaching roller 5 , while the front detaching roller 4 passes through the technically necessary phase P1 in time, which is specified for the actual combing program. Through the phase P2 of the rear separation roller 5, the speed difference of up to 10% of the front separation roller 4 is behind the phase P1 of the front separation roller 4, resulting in a softer and smoother phase trend, wherein the phase P1 , P2 coincide again at the inversion points U1, U2. Here, in particular, the angular velocity, the angular acceleration of the phase course of the rear detaching roller 5 relative to the detaching roller 4 changes over the combing cycle. A different power consumption of the motorized drives 6 , 7 occurs, wherein the motorized drive 7 of the detaching roller 5 compared to the motorized drive 6 of the detaching roller 4 can have a power consumption of up to 20 % less power consumption.

The invention is not limited in its implementation to the preferred examples described above. Rather, numerous variants are conceivable, which can likewise be used in substantially different embodiments from the solution shown. All features and/or advantages which result from the claims, the description or the drawings, including structural details or spatial arrangements, can represent the essence of the invention both on their own and in various combinations.

List of reference signs

100 Combers

1 circular comb roller

2 upper nipper

3 lower nipper

4 Front separation rollers

5 Post separation rollers

6 motor drive unit

7 Motor drive unit

8 control unit

9 drive unit

10 fiber bundles

11 Feeding cylinder

12 Nipper arm

13 Nipper shaft

14 circular comb arc

15 front paired separation rollers

16 rear paired separation rollers

17 fiber rolls

18 winding roller

19 winding roller

20 delivery roller pairs

α1 rotation angle

α2 rotation angle

Phase of P1 front separating roller

Phase of the separation roller after P2

U1 first inversion point

U2 second inversion point

S ring.

Claims (as amended under Article 19 of the Treaty)

1. Method for operating a combing machine (100) for textile preparation, which has a circular comb roller (1) driven in rotation, by which fiber bundles (10) are guided in a periodic sequence, In order to comb out the fiber bundles, the combing machine also has an upper nipper (2) and a lower nipper (3), by which the fibers to be combed are clamped in periodic order by means of the upper nipper and the lower nipper bundle (10) and release it again, the combing machine also has a rotationally driven front detaching roller (4) and a rotationally driven rear detaching roller (5), wherein the detaching rollers (4, 5) are constructed with In the case of a reversal point (U1, U2), rotating back and forth in a Pilgering motion, and wherein the fiber bundle (10) is separated in a periodic sequence at least by means of the front detaching roller (4), characterized in that , the rear detaching roller (5) is rotationally driven in a phase (P2) which is in the phase of the rotationally driven front detaching roller (4) between the reversal points (U1, U2) ( P1) thereafter, wherein the phases (P1, P2) of the detaching rollers (4, 5) are re-aligned at the inversion point (U1, U2).

2. Method according to claim 1, characterized in that the rear detaching roller (5) is operated between the inversion points (U1, U2) with a maximum rotational acceleration which is less than the maximum rotational acceleration The maximum rotational acceleration of said front detaching roller (4) between said reversal points (U1, U2).

3. Method according to claim 1 or 2, characterized in that the rear detaching roller (5 ) change in rotational speed per time unit is smaller than the change in rotational speed per time unit of said front detaching roller (4).

4. The method according to any one of claims 1 to 3, characterized in that the separate driving of the Front separation roller (4) and rear separation roller (5).

5. Method according to any one of the preceding claims, characterized in that the phase (P2) of the rear detaching roller (5) is offset from the phase (P1) of the front detaching roller (4) such that the Segments of fiber bundles (10) form rings (S) recurring in periodic sequence between the detaching rollers (4, 5).

6. The method according to any one of the preceding claims, characterized in that, compared with the motorized drive (6) of the front detaching roller (4), the The motorized drive (7) of the rear detaching roller (5) is operated with small, maximum power during the Pilgering cycle.

7. A combing machine (100) for textile preparation, which has a rotary-driven circular comb roll (1), which is configured to comb out fiber bundles (10) in a periodic sequence, the comb The combing machine also has an upper nipper (2) and a lower nipper (3) configured to clamp and release again the fiber bundles (10) to be combed out in a periodic sequence , the combing machine additionally has a rotationally driven front detaching roller (4) and a rotationally driven rear detaching roller (5), wherein the detaching rollers (4, 5) are used for ), rotating back and forth in a pilgering motion, the combing machine additionally has a control unit (8) by means of which the combing machine can be operated according to a method according to any one of the preceding claims (100).

8. The combing machine (100) according to claim 7, characterized in that the front detaching roller (4) has a first motor drive (6) and the rear detaching roller (5) has a second Motorized drives (7), which are designed to be controllable by the control unit (8) separately from one another.

Claims (8)

1. Method for operating a combing machine (100) for textile preparation, having a rotationally driven circular combing roller (1) through which a fibre bundle (10) is guided in a periodic sequence for the combing out of the fibre bundle, having an upper nipper (2) and a lower nipper (3), by means of which the fibre bundle (10) to be combed out is nipped in a periodic sequence and released again, and further having a rotationally driven front detaching roller (4) and a rotationally driven rear detaching roller (5), wherein the detaching rollers (4, 5) are rotated back and forth in a pell-type movement in the case of a reversal point (U1, U2) being formed, and wherein the fibre bundle (10) is separated in a periodic sequence at least by means of the front detaching roller (4), characterized in that the rear detaching roller (5) is rotationally driven with a phase (P2), which phase (P2) is after the rotation of the front detaching roller (4) between the U1, U2).

2. Method according to claim 1, characterized in that the rear detaching roller (5) is operated between the reversal points (U1, U2) with a maximum rotational acceleration which is smaller than the maximum rotational acceleration of the front detaching roller (4) between the reversal points (U1, U2).

3. Method according to claim 1 or 2, characterized in that the change in the rotational speed per time unit of the back detaching roller (5) is smaller than the change in the rotational speed per time unit of the front detaching roller (4) before and/or after passing through the phase (P1, P2) via a reversal point (U1, U2).

4. Method according to any one of claims 1 to 3, characterized in that the front detaching roller (4) and the rear detaching roller (5) are driven separately by means of motor drives (6, 7) which are each assigned to the detaching rollers (4, 5).

5. Method according to any of the preceding claims, characterized in that the phase (P2) of the back detaching roller (5) is offset from the phase (P1) of the front detaching roller (4) so that the segments of the fibre bundle (10) constitute a loop (S) between the detaching rollers (4, 5) that recurs in a periodic sequence.

6. Method according to any one of the preceding claims, characterized in that the motor drive (7) of the rear detaching roller (5) is operated with a lower average power and/or with a lower maximum power during the piler format cycle than the motor drive (6) of the front detaching roller (4).

7. Combing machine (100) for textile preparation, having a control unit (8) by means of which the combing machine (100) can be operated according to the method of any one of the preceding claims.

8. Combing machine (100) according to claim 7, characterised in that the front detaching roller (4) has a first motor drive (6) and the rear detaching roller (5) has a second motor drive (7), which are configured to be controllable separately from one another by the control unit (8).

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