Claims
- 1. Suction insert assembly arrangement for a suction roller of an open-end spinning unit of the type having a pair of rotatably driven friction rollers disposed adjacent one another to form a yarn forming wedge-shaped gap therebetween, with at least one of the friction rollers being formed as a suction roller with a perforated shell means and a suction insert assembly disposed therein for directing suction air flow in the region of the wedge-shaped gap, said suction insert assembly comprising:
- pipe means connectible to a vacuum source, said pipe means being non-rotatably supported by spinning unit support means, said pipe means including a pipe slot means communicating the outer surface of the pipe means with the vacuum source, said pipe slot means being circumferentially located approximately in the area of said wedge-shaped gap; and
- intermediate piece means interposed between the outer surface of the pipe means and the perforated shell means, said intermediate piece means including intermediate slot means for communicating the pipe slot means to the inside surface of the perforated shell means, said intermediate piece means being adjustably mounted at the pipe means to accommodate relative movement of the intermediate piece means with respect to the pipe means in at least one of the circumferential and axial directions to adjust at least one of either the direction or magnitude of the suction air flow occurring during a yarn forming operation.
- 2. An arrangement according to claim 1, wherein the perforated shell means includes belt drive surface means for accommodating driving thereof by a belt drive means engaging there against, and wherein said intermediate piece means is adjustably mounted for relative movement in both the axial and circumferential direction with respect to the pipe means.
- 3. An arrangement according to claim 1, further comprising rotatable bearing means for rotatably supporting the perforated shell means on the pipe means.
- 4. An arrangement according to claim 3, wherein the rotatable bearing means are roller bearing means.
- 5. An arrangement according to claim 4, wherein the roller bearing means are ball bearing means having an inner race fitted to the pipe means and an outer race fitted to a bracket means attached to the perforated sleeve means.
- 6. Arrangement according to claim 3, wherein the pipe-shaped intermediate piece means is provided on its outer surface with ring grooves and/or annular rings sealing off the intermediate slot means with respect to the roller bearing means.
- 7. An arrangement according to claim 3, wherein the pipe means is a constant diameter pipe which extends beyond both ends of the intermediate piece means to form bearing places for the roller bearing means supporting the perforated shell means.
- 8. An arrangement according to claim 7, wherein set screw means are provided for adjustably locking the intermediate piece means to the pipe means.
- 9. An arrangement according to claim 1, wherein the pipe means is a cylindrical pipe and the intermediate piece means is a cylindrical pipe-shaped intermediate piece slipped onto the pipe, wherein the pipe has a slot-shaped connection opening to a suction slot forming the intermediate slot means of the intermediate piece means.
- 10. An arrangement according to claim 9, wherein the cylindrical pipe projects beyond axial ends of the perforated shell means, said shell means being mounted on the cylindrical pipe by means of roller bearings at both ends of the shell with the intermediate piece means arranged between the roller bearings.
- 11. Arrangement according to claim 10, wherein the pipe-shaped intermediate piece means is provided on its outer surface with ring grooves and/or annular rings sealing off the intermediate slot means with respect to the roller bearing means.
- 12. An arrangement according to claim 1 wherein the intermediate piece means is made of plastic.
- 13. An arrangement according to claim 1, wherein the intermediate suction slot means of the intermediate piece means is bounded by at least one groove extending in parallel to its contour.
- 14. An arrangement according to claim 1, wherein the perforated shell means is provided with a recess located in axial direction outside the area of the intermediate slot means of the intermediate piece means, the intermediate piece means being provided in the area of said recess with a working surface for tools.
- 15. An arrangement according to claim 1 wherein the intermediate piece means is provided with at least one recess spaced from the intermediate slot means and extending approximately over the perforated area of the shell and being open in the direction of the shell.
- 16. An arrangement according to claim 15, wherein the recess of the intermediate piece means is connected with the inside of the pipe means via openings.
- 17. An arrangement according to claim 1, wherein the intermediate slot means has a shape that is different from the shape of the pipe slot means.
- 18. An arrangement according to claim 17, wherein the width of the pipe slot means in the circumferential direction is larger than the width of the intermediate slot means.
- 19. An arrangement according to claim 1, wherein the intermediate slot means includes several suction slots that differ from one another, and that can selectively be brought into alignment with the pipe slot means.
- 20. An arrangement according to claim 1, wherein the intermediate slot means is divided into several sections.
- 21. An arrangement according to claim 20, wherein the sections of the intermediate slot means have varying widths in circumferential direction.
- 22. An arrangement according to claim 21, wherein the sections of the intermediate slot are staggered with respect to one another in circumferential direction.
- 23. An arrangement according to claim 20, wherein the sections of the intermediate slot are staggered with respect to one another in circumferential direction.
- 24. An arrangement according to claim 1, wherein the pipe slot means is mounted so that it slopes toward a generating line of the pipe means.
- 25. An arrangement according to claim 1, wherein the intermediate slot means is mounted so that it slopes towards a generating line of the intermediate piece means.
- 26. An arrangement for open-end friction spinning of yarn comprising:
- two friction rollers rotatably drivable in the same direction and disposed adjacent one another to form a yarn forming wedge-shaped gap therebetween,
- fiber supplying means for supplying individual fibers to a fiber feeding zone extending over a limited axial extent of the wedge-shaped gap,
- differential friction effect means for applying a differential friction effect to forming yarn at different axial sections of the fiber feeding zone, and adjusting means for adjusting the differential friction effect means for different operational spinning conditions, said adjusting means including means for effecting relative movement of friction roller parts to change at least one of slot size and position of suction slots extending adjacent the fiber feeding zone.
- 27. An arrangement according to claim 26, wherein at least one of the friction rollers is formed as a suction roller with a perforated shell means and a suction insert assembly disposed therein for directing suction air flow in the region of the wedge-shaped gap.
- 28. An arrangement according to claim 26, wherein said differential effect means includes means for applying different suction effects along the length of the yarn forming gap.
- 29. An arrangement according to claim 28, wherein said adjusting means includes means for varying the suction effect along the yarn forming gap for different operational spinning conditions.
- 30. An arrangement for open-end friction spinning of yarn comprising:
- two friction rollers rotatably drivable in the same direction and disposed adjacent one another to form a yarn forming wedge-shaped gap therebetween,
- fiber supplying means for supplying individual fibers to a fiber feeding zone extending over a limited axial extent of the wedge-shaped gap.
- different friction effect means for applying a differential friction effect to forming yarn at different axial sections of the fiber feeding zone, and adjusting means for adjusting the differential friction effect means for different operational spinning conditions,
- wherein at least one of the friction rollers is formed as a suction roller with a perforated shell means and a suction insert assembly disposed therein for directing suction air flow in the region of the wedge-shaped gap,
- wherein said differential friction effect means comprises:
- pipe means connectible to a vacuum source, said pipe means being non-rotatably supported by spinning unit support means, said pipe means including a pipe slot means communicating the outer surface of the pipe means with the vacuum source, said pipe slot means being circumferentially located approximately in the area of said wedge-shaped gap; and
- intermediate piece means interposed between the outer surface of the pipe means and the perforated shell means, said intermediate piece means including intermediate slot means for communicating the pipe slot means to the inside surface of the perforated shell means, said intermediate piece means being adjustably mounted at the pipe means to accommodate relative movement of the intermediate piece means with respect to the pipe means in at least one of the circumferential and axial directions to adjust at least one of either the direction or magnitude of the suction air flow occurring during a yarn forming operation.
- 31. An arrangement according to claim 30, further comprising rotatable bearing means for rotatably supporting the perforated shell means on the pipe means.
- 32. A process for open-end friction spinning of yarn comprising:
- rotatably driving a pair of adjacently arranged friction rollers forming a wedge-shaped gap therebetween in the same rotational direction, supplying fibers to a fiber feeding zone extending over a limited axial extent of the wedge-shaped gap, withdrawing spun yarn form the wedge-shaped gap, and adjusting the friction effect along the length of the wedge shaped gap for different operational spinning conditions by effecting relative movement of roller parts to change at least one of slot size and position of suction slots extending adjacent the fiber feeding zone.
- 33. A process according to claim 32, wherein said adjusting includes adjusting the suction effect along the length of the yarn forming gap.
Priority Claims (1)
Number |
Date |
Country |
Kind |
3316656 |
May 1983 |
DEX |
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Parent Case Info
This is a continuation of application Ser. No. 607,275, filed May 4, 1984, now abandoned.
US Referenced Citations (4)
Foreign Referenced Citations (1)
Number |
Date |
Country |
339778 |
Feb 1977 |
ATX |
Continuations (1)
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Number |
Date |
Country |
Parent |
607275 |
May 1984 |
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