WORKSTATION OF A TWO-FOR-ONE TWISTING OR CABLING MACHINE FOR THE PRODUCTION OF CARPET YARN

Abstract

Workstation of a two-for-one twisting or cabling machine for production of carpet yarn, including winding device having package cradle with two frame arms for rotatable mounting of an empty tube or twisting package, package drive roller for frictionally driving twisting package, yarn traversing device for traversing transfer of a yarn to the twisting package, advance roller for regulating a yarn tension, and cover in area of the advance roller with an opening for yarn guided through the yarn traversing device to the twisting package. Package cradle has at least one movable, partially rotatable frame arm and designed so an empty tube with length of at least 315 mm is insertable, that the package drive roller has length of at least 286 mm, that yarn traversing device has traversing stroke of at least 11 inches, and that opening in cover corresponds with the yarn path arising due to the traversing stroke.

Claims

1. A workstation (2) of a two-for-one twisting or cabling machine (1) for the production of carpet yarn, comprising a winding device (11) that has a package cradle (17) with two frame arms for the rotatable mounting of an empty tube (18) or twisting package (16), a package drive roller (19) for frictionally driving a twisting package (16), a yarn traversing device (20) for the traversing transfer of a yarn to the twisting package (16), an advance roller (23) for regulating a yarn tension as well as a cover (21) in the area of the advance roller (23) with an opening (22) for the yarn guided through the yarn traversing device (20) to the twisting package (16), characterised in that, the package cradle (17) has at least one movable, partially rotatable frame arm and is designed so that an empty tube (18) with a length of at least 315 mm can be inserted, that the package drive roller (19) has a length of at least 286 mm, that the yarn traversing device (20) has a traversing stroke of at least 11 inches, and that the opening (22) in the cover (21) corresponds with the yarn progress occurring through the traversing stroke.

2. The workstation (2) of a two-for-one twisting or cabling machine (1) according to claim 1, characterised in that, in the package cradle (17) an empty tube (18) with a length of at least 340 mm can be positioned and the traversing stroke is 12 inches.

3. The workstation (2) of a two-for-one twisting or cabling machine (1) according to claim 1, characterised in that, in the package cradle (17) an empty tube (18) with a length of at least 365 mm can be positioned and the traversing stroke is 13 inches.

4. A two-for-one twisting or cabling machine (1), including a winding device (11) that has a package cradle (17) with two frame arms for the rotatable mounting of an empty tube (18) or twisting package (16), a package drive roller (19) for frictionally driving a twisting package (16), a yarn traversing device (20) for the traversing transfer of a yarn to the twisting package (16), an advance roller (23) for regulating a yarn tension as well as a cover (21) in the area of the advance roller (23) with an opening (22) for the yarn guided through the yarn traversing device (20) to the twisting package (16), characterised in that, the two-for-one twisting or cabling machine (1) has at least one workstation (2) that is configured according to one of the preceding claims.

5. A method for operating a two-for-one twisting or cabling machine (1) comprising a winding device (11) that has a package cradle (17) with two frame arms for the rotatable mounting of an empty tube (18) or twisting package (16), a package drive roller (19) for frictionally driving a twisting package (16), a yarn traversing device (20) for the traversing transfer of a yarn to the twisting package (16), an advance roller (23) for regulating a yarn tension as well as a cover (21) in the area of the advance roller (23) with an opening (22) for the yarn guided through the yarn traversing device (20) to the twisting package (16), characterised in that, an empty tube (18) with a length of at least 315 mm is inserted into the package cradle (17), and the thread is laid with a traverse stroke of at least 11 inches.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In the following, the invention is explained in more detail below on the basis of an exemplary embodiment(s) with reference to the accompanying drawings, wherein:

[0037] FIG. 1 is a schematically presented cross-section of a cabling machine.

[0038] FIG. 2 is a schematically presented view of a winding device.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0039] In FIG. 1, a schematic cross-section view of a cabling machine 1 is depicted, that has a number of workstations 2 positioned next to each other in the running direction of the machine. The workstations 2 each comprise a cabling spindle 3 with a spindle pot 8 as well as a drivable yarn storage disc 9 positioned below the spindle pot 8. A yarn brake 4 and a balloon guide 5 are positioned above the cabling spindle 3. The spindle pot 8 serves to take up an initial feed package 6 from which an inner yarn 7 is drawn over the head. The inner yarn 7 of the first feed package 6 is guided over the yarn brake 4 to the balloon guide 5.

[0040] Each workstation 2 has a feed device for feed packages located outside the spindle pot 8, a so-called creel 12, which is installed to take up at least one further feed package 13.

[0041] The creel 12 has several mandrels 14 in this embodiment example. An external yarn 15 is drawn from a second feed package 13 positioned on the creel 12, which is guided axially from below through the hollow axle of the cabling spindle 3. The external yarn 15 coming from the second feed package 13 is turned around in a radial direction and exits to the yarn storage disc 9 below the first feed package 6 from the hollow axle of the cabling spindle 3. The yarn storage disc 9 is turned via the cabling spindle 3. The external yarn 15 exiting from the yarn storage disc 9 rotates around the spindle pot 8 and is guided through the balloon guide 5. The inner yarn 7 and external yarn 15 combined in the balloon guide 5 form a cabled double yarn, while the external yarn 15 coming from the second feed package 13 winds around the inner yarn 7 coming from the first feed package 6. The double yarn thus created is guided to a winding device 11 and wound into a take-up or twisting package 16.

[0042] Two feed packages 6, 13 are used for producing a twisting package 16 with a diameter of 400 mm. The first feed package 6 is brought into the spindle pot 8, the second feed package 13 is put onto a mandrel 14 of the creel 12. The unwinding process of both of the feed packages 6 and 13 ends when the pre-specified completion diameter of the twisting package 16 is reached.

[0043] At the point of completion, yarn is drawn from both of the feed packages 6 and 13 in equal amounts, so that, in this embodiment example, both feed packages are approximately half unwound. The twisting package 16 is removed and a new empty tube is fixed. In addition, the package cradle 17 must be manually raised, so that the twisting package 16 is lowered by the package drive roller 19. In order to be able to handle the higher weight of the twisting package 16 with the package cradle 17 better due to the higher running length, the package cradle 17 can be attached at both sides, i.e. at each frame arm and rotated into an upper locking position. Finally, a new twisting package 16 is produced.

[0044] The feed packages can, for example, alternatively have half the yarn amount of the twisting package 16 to be produced. Such alternative twisting packages are designated with the references 13.1 and 13.2. In this case, at the time of completion of the twisting package 16, both feed packages 6 and 13.1 or 13.2 are completely unwound except for a small remnant of yarn. The unwound feed packages 6 and 13.1 or 13.2 are then replaced with new ones.

[0045] FIG. 2 shows a schematic illustration of the winding device 11 of a workstation 2. The movable, spring-mounted package cradle 17 is designed so that an empty tube 18 with a length of 340 mm is rotatable. The cabled yarn is wound onto the empty tube 18 for producing the twisting package 16. In addition, the empty tube 18 is driven by means of friction with a package drive roller 19. The yarn traversing device 20, depicted in this embodiment example as yarn guide 24, is designed to perform a traversing stroke of 12 inches.

[0046] An advance roller 23, covered by the cover 21, regulates the yarn tension of the yarn to be wound onto the twisting package 16. The yarn is led to the yarn guide 24 through the cover 21, which has an opening 22 for this purpose.

[0047] The path of the yarn to the yarn guide 24 in its most extreme right position, which is ideally imagined as a straight line, is represented as a dashed line. Accordingly, the path of the yarn to the yarn guide 24 in its most extreme left position is also represented as an ideal straight line. This means that, for both of the thread guides represented, they are not separate components, instead the same yarn guide 24 is represented in its two extreme positions, which executes a traversing stroke of 12 inches on its way between these two positions, in order to produce a twisting package 16 with a 20% greater running length.

LIST OF REFERENCE NUMBERS

[0048] 1 Cabling machine [0049] 2 Workstation [0050] 3 Cabling spindle [0051] 4 Yarn brake [0052] 5 Balloon guide [0053] 6 First feed package [0054] 7 Inner yarn [0055] 8 Spindle pot [0056] 9 Yarn storage disc [0057] 11 Winding device [0058] 12 Creel [0059] 13 Second feed package [0060] 13.1 Alternative feed package [0061] 13.2 Alternative feed package [0062] 14 Mandrel [0063] 15 Outer yarn [0064] 16 Twisting package [0065] 17 Package cradle [0066] 18 Empty tube [0067] 19 Package drive roller [0068] 20 Yarn traversing device [0069] 21 Cover [0070] 22 Opening [0071] 23 Advance roller [0072] 24 Yarn guide

[0073] It will therefore be readily understood by those persons skilled in the art that the present invention is susceptible of broad utility and application. Many embodiments and adaptations of the present invention other than those herein described, as well as many variations, modifications and equivalent arrangements, will be apparent from or reasonably suggested by the present invention and the foregoing description thereof, without departing from the substance or scope of the present invention. Accordingly, while the present invention has been described herein in detail in relation to its preferred embodiment, it is to be understood that this disclosure is only illustrative and exemplary of the present invention and is made merely for purposes of providing a full and enabling disclosure of the invention. The foregoing disclosure is not intended or to be construed to limit the present invention or otherwise to exclude any such other embodiments, adaptations, variations, modifications and equivalent arrangements.