Textile machine assembly comprising a sliver storage unit for the interim storage of sliver

Abstract

A textile machine assembly includes a delivery unit and a receiving unit, wherein during operation of the textile machine assembly the delivery unit delivers a sliver to the receiving unit. A sliver storage unit is operatively configured between the delivery unit and the receiving unit to store, at least intermittently, excess sliver between the delivery unit and the receiving unit when a delivery speed of the sliver at the delivery unit is higher than a receiving speed of the sliver at the receiving unit, and to release the stored sliver when the receiving speed of the sliver at the receiving unit is higher than the delivery speed of the sliver at the delivery unit. The sliver storage unit includes a diverting unit that is movable with respect to the delivery unit or the receiving unit, wherein movement of the diverting unit changes a sliver path of the sliver from the delivery unit to the receiving unit.

Claims

1. A textile machine assembly, comprising: a delivery unit comprising a card machine; a receiving unit comprising a drafting frame, wherein during operation of the textile machine assembly the card machine delivers a sliver to the drafting frame; a sliver storage unit operatively configured between the card machine and the drafting frame to store, at least intermittently, excess sliver between the card machine and drafting frame when a delivery speed of the sliver at the card machine is higher than a receiving speed of the sliver at the drafting frame, and to release the stored sliver when the receiving speed of the sliver at the drafting frame is higher than the delivery speed of the sliver at the card machine; the sliver storage unit comprising a diverting unit that is movable with respect to the card machine or the drafting frame, wherein movement of the diverting unit changes a sliver path of the sliver from the card machine to the drafting frame; and wherein to increase storage, the diverting unit is movable in a first upward direction (Z) counter to a gravity direction (S) to lift the sliver such that a hanging loop formed in the sliver between the carding machine and the diverting unit increases in size.

2. The textile machine assembly as in claim 1, wherein the sliver storage unit is situated at the card machine or at the drafting frame.

3. The textile machine assembly as in claim 1, wherein the diverting unit is movable in a second direction (X) perpendicular to the first direction (Z) and in parallel to a connecting axis between the card machine and the drafting frame to allow an additional loop to form in the sliver between the diverting loop and the drafting frame.

4. The textile machine assembly as in claim 3, wherein the diverting unit is movable in a third direction (Y) perpendicular to the first direction (Z) and perpendicular to the connecting axis between the card machine and the drafting frame.

5. The textile machine assembly as in claim 4, wherein the diverting unit is movable in such a way that the first, the second, and the third directions (Z, X, Y) are superimposed.

6. The textile machine assembly as in claim 1, wherein the diverting unit is movable by a distance corresponding to at least 50% of a distance between the card machine and the drafting frame.

7. The textile machine assembly as in claim 1, further comprising an actuator configured with the sliver storage unit to move the diverting unit.

8. The textile machine assembly as in claim 7, wherein the actuator comprises one of a hydraulic actuator, a pneumatic actuator, an electric motor, a stepper motor, or a servo motor, and the diverting unit is situated on an extension configured with the actuator.

9. The textile machine assembly as in claim 1, further comprising a controller connected to one or both of the card machine and the drafting frame and to the sliver storage unit.

10. A method for the interim storage of a sliver at a textile machine assembly in accordance with claim 1, comprising storing, at least intermittently, the excess sliver in a growing loop between the card machine and the drafting frame when the delivery speed of the sliver at the card machine is higher than a receiving speed of the sliver at the drafting frame, and releasing the stored sliver when the receiving speed of the sliver at the drafting frame is higher than the delivery speed of the sliver at the card machine, wherein for the storing and the releasing of the sliver, the sliver path of the sliver between the card machine and the drafting frame is changed with the diverting unit to allow for the loop to increase in size.

11. The method as in claim 10, wherein the diverting unit is moved to length the sliver path is the sliver is sagging in the sliver path.

12. The method as in claim 11, wherein the diverting unit is moved in such a way that a loop forming in the sliver as a result of the sagging sliver is reduced in size or maintains a constant size.

13. The method as in claim 10, wherein the diverting unit is moved so as to shorten the sliver path in order to release the stored sliver.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Further advantages of the invention are described in the following exemplary embodiments. Wherein:

(2) FIG. 1 shows a schematic view of a textile machine assembly comprising a delivery unit, a receiving unit, and a sliver;

(3) FIG. 2 shows a schematic view of a textile machine assembly comprising a delivery unit, a receiving unit, a sliver, and a sliver storage unit comprising a diverting unit;

(4) FIG. 3 shows a schematic view of a textile machine assembly comprising a delivery unit, a receiving unit, a sliver, and a sliver storage unit comprising a moved diverting unit; and

(5) FIG. 4 shows a schematic view of a textile machine assembly comprising a delivery unit, a receiving unit, a sliver, and a sliver storage unit comprising a moved diverting unit.

DETAILED DESCRIPTION

(6) Reference will now be made to embodiments of the invention, one or more examples of which are shown in the drawings. Each embodiment is provided by way of explanation of the invention, and not as a limitation of the invention. For example features illustrated or described as part of one embodiment can be combined with another embodiment to yield still another embodiment. It is intended that the present invention include these and other modifications and variations to the embodiments described herein.

(7) FIG. 1 shows a textile machine assembly 1 comprising a delivery unit 3 and a receiving unit 4.

(8) A sliver 2 is delivered with the aid of the delivery unit 3 during the operation of the textile machine assembly 1. The delivery unit 3 can be a card, for example, which can card the textile fibers. The delivery unit 3 can also be another unit, however, which provides the sliver 2. The delivery unit 3 can deliver the sliver 2 with a delivery speed during operation. The delivery speed can be, for example, 10 m/min. Therefore, 10 m sliver per minute are delivered by the delivery unit 3.

(9) The sliver 2 delivered by the delivery unit 3 is received with the aid of the receiving unit 4 during the operation of the textile machine assembly 1. According to the present exemplary embodiment, the receiving unit 4 is a drafting frame which comprises a drafting system 5. The receiving unit 4 can also be another unit, however, which receives the sliver 2. According to the present exemplary embodiment, the receiving unit 4 can comprise an entry roller 6, with the aid of which the sliver 2 can be guided into the receiving unit 4. The receiving unit 4 can have a receiving speed at which the receiving unit 4 receives the sliver 2. Advantageously, the delivery speed of the delivery unit 3 and the receiving speed of the receiving unit 4 are equal. As a result, on the one hand, the sliver 2 is prevented from tearing. On the other hand, this prevents the sliver 2 from being placed on a base 12 between the delivery unit 3 and the receiving unit 4, wherein the sliver 2 can become dirty and damaged in this way.

(10) If the delivery speed and the receiving speed are equal, the sliver 2 can have a first sliver path 7. The first sliver path 7 can be a direct path between an exit point 10 of the sliver 2 at the delivery unit 3 and an entry point 11 of the sliver 2 at the receiving unit 4. In this case, the sliver 2 has the first sliver path 7. This can represent a normal operation of the textile machine assembly 1.

(11) If the receiving unit 4 is a drafting frame 4, for example, a can (not shown here) can be positioned downstream from the drafting frame 4, in which the sliver 2 drafted by the drafting frame 4 is placed. The can becomes completely filled after a certain amount of time, and a can change is necessary. For this purpose, the receiving unit 4 must be briefly stopped or at least briefly decelerated in terms of a processing speed. This means, the receiving unit 4 can only more slowly receive the sliver 2 or, if stopped, the receiving unit 4 cannot receive sliver 2 at all. The receiving speed of the receiving unit 4 is lower than the receiving speed during normal operation. When the delivery unit 3 delivers the sliver 2 at an unchanged delivery speed, however, and the delivery speed is therefore higher than the receiving speed, a sliver loop 9, which is represented as a dashed line, forms between the delivery unit 3 and the receiving unit 4, according to FIG. 1. If the sliver loop 9 becomes larger than shown in FIG. 1, the sliver 2 will eventually land on the base 12, which can be disadvantageous, as described above.

(12) According to FIG. 2, the textile machine assembly 1 can comprise a sliver storage unit 13 which includes a diverting unit 14. The sliver 2 can be diverted with the aid of the diverting unit 14. The sliver path for the sliver 2 from the delivery unit 3 to the receiving unit 4 can also be changed with the aid of the diverting unit 14. In this exemplary embodiment, the sliver storage unit 13 comprising the diverting unit 14 is situated at the receiving unit 4. Additionally or alternatively, the sliver storage unit 13 can also be situated at the delivery unit 3. Additionally or alternatively as well, a sliver storage unit 13 can also be situated in an area between the delivery unit 3 and the receiving unit 4. For example, the sliver storage unit 13 can stand on the base 12.

(13) The sliver storage unit 13 comprises an extension 15, at the end of which the diverting unit 14 is situated. The sliver storage unit 13 can comprise an actuator (not shown here), with the aid of which the extension 15 can be moved, and so the diverting unit 14 can be moved. The actuator can be, for example, a hydraulic actuator, a pneumatic actuator, an electric motor, and/or a stepper motor, wherein the actuator can be controlled with the aid of a controller 17 in order to move the diverting unit 14. The extension 15 can be, for example, a telescopic rod, and so the diverting unit 14 can be moved even further.

(14) The textile machine assembly 1 can furthermore comprise the controller 17 which can move the diverting unit 14. The controller 17 can receive, for example, information from the delivery unit 3 and/or from the receiving unit 4. For example, the controller 17 can receive the delivery speed of the sliver 2 at the delivery unit 3. Additionally or alternatively, the controller 17 can also receive the receiving speed of the sliver 2 at the receiving unit 4. The controller 17 can calculate, for example, the difference on the basis thereof. On the basis thereof, the controller 17 can calculate how much sliver 2 is to be stored for the interim. The controller 17 can correspondingly move the diverting unit 14.

(15) FIG. 3 shows a textile machine assembly 1 comprising the delivery unit 3, the receiving unit 4, and comprising a moved diverting unit 14. The diverting unit 14 has been moved along a first direction Z. The first direction Z is oriented in parallel to a gravity direction S. The gravity along the gravity direction S pulls the sliver 2 downward into the loop 9 in the direction of the base 12. The diverting unit 14 has been moved further counter to the gravity direction S along the first direction Z.

(16) The first sliver path 7 according to FIG. 1 or 2 is now indicated with the aid of a dash-dotted line. The first sliver path 7 is, for example, 2 m. Since the diverting unit 14 has moved, the sliver path has also changed. The sliver 2 must now follow a second sliver path 8 in order to reach the receiving unit 4. The second sliver path 8 is an alternate path as compared to the first sliver path 7, and so the second sliver path 8 is longer than the first sliver path 7. The sliver 2 now must extend from the exit point 10 and over the diverting unit 14 in order to reach the entry point 11. The second sliver path 8 has a length, for example, which is 2.5 m. A difference between the second and the first sliver paths 7, 8 is 0.5 m, and so this length of sliver 2 is stored for the interim.

(17) The diverting unit 14 can be moved, for example, in the first direction Z counter to the gravity force S at a point in time when the receiving speed at the receiving unit 4 drops below the delivery speed at the delivery unit 3. The sliver 2 is therefore drawn upward at the same time as when more sliver 2 is delivered by the delivery unit 3 than can be accommodated by the receiving unit 4. This case occurs, for example, when the receiving unit 4 is a drafting frame and a can change is started.

(18) The diverting unit 14 can also first move in the first direction Z counter to the gravity direction S when the loop 9 has formed. Only when the loop 9 according to the exemplary embodiment from FIG. 2 has formed, for example, can the diverting unit 14 be moved in the first direction Z counter to the force of gravity and, therefore, away from the base 12. According to FIG. 3, the sliver 2 then has a third sliver path 16. In contrast to the second sliver path 8, more sliver 2 is stored for the interim with the aid of the loop 9. The third sliver path 16, which extends from the exit point 10 through the loop 9 and over the diverting unit 14 to the entry point 11, can have, for example, a length of 3.5 m. The first sliver path 7 is 2 m, and so, in contrast thereto, 1.5 m of sliver 2 is stored for the interim. In this type of arrangement of the sliver 2 according to the third sliver path 16, it is therefore possible for 1.5 m of sliver 2 to be stored for the interim when the sliver 2 was situated along the first sliver path 7 at the beginning. When the delivery speed is, for example, 10 m/min, and the receiving unit 4 is completely stopped, for example, for a can change, it takes 9 seconds for 1.5 m of sliver 2 to be stored for the interim. This means, the can change can last for 9 s until the receiving unit 4 must be restarted in order to receive the sliver 2 again.

(19) When the sliver 2 is to be released again, the diverting unit 14 can be moved back into the starting position. According to FIG. 3, the diverting unit 14 is moved in the first direction Z in the direction of the base 12. The release can then take place, for example, when the can change has been concluded. The receiving unit 4 can receive the sliver 2 faster than the delivery unit 3 delivers the sliver 2, for a short period of time. As a result, the excess sliver 2 is guided into the receiving unit 4. For example, the diverting unit 14 can be moved back into the starting position only when the loop 9 has receded. The sliver 2 then no longer extends along the third sliver path 16. Instead, the sliver 16 extends along the second sliver path 8. Only then can the diverting unit 14 be moved. Alternatively, the diverting unit 14 can also be moved in such a way that the loop 9 recedes and, simultaneously, the diverting unit 14 is moved.

(20) FIG. 4 shows a schematic view of a textile machine assembly 1 comprising a delivery unit 3, a receiving unit, and a moved diverting unit 14. In this exemplary embodiment, the diverting unit 14 can be moved in a second direction X in addition to the first direction Z. The second direction X is oriented along a connecting axis between the delivery unit 3 and the receiving unit 4. Due to the second direction X, the diverting unit 14 can therefore be moved in the direction of the delivery unit 3 and/or in the direction of the receiving unit 4. According to the exemplary embodiment represented in FIG. 4, the movement of the diverting unit 14 in the first direction Z and in the second direction X are superimposed. The diverting unit 14 can therefore also be moved at a slant.

(21) Additionally or alternatively, the diverting unit 14 can also be moved along a third direction Y which is not shown here, however. In this side view of the textile machine assembly 1, the third direction Y is oriented out of or into the plane of the drawing. The diverting unit 14 can therefore be moved laterally along the third direction Y.

(22) The present invention is not limited to the exemplary embodiments which have been represented and described. Modifications within the scope of the claims are also possible, as is any combination of the features, even if they are represented and described in different exemplary embodiments.

LIST OF REFERENCE SIGNS

(23) 1 textile machine assembly

(24) 2 sliver

(25) 3 delivery unit

(26) 4 receiving unit

(27) 5 drafting system

(28) 6 entry roller

(29) 7 first sliver path

(30) 8 second sliver path

(31) 9 loop

(32) 10 exit point

(33) 11 entry point

(34) 12 base

(35) 13 sliver storage unit

(36) 14 diverting unit

(37) 15 extension

(38) 16 third sliver path

(39) 17 controller

(40) Z first direction

(41) X second direction

(42) Y third direction

(43) S gravity direction