Spinning nozzle and spinning station of an air-jet spinning machine fitted therewith

Patent metadata

Field	Value
Publication number	US-9243352-B2
Application number	US-201414303960-A
Country	US
Kind code	B2
Filing date	Jun 13, 2014
Priority date	Jun 14, 2013
Publication date	Jan 26, 2016
Grant date	Jan 26, 2016

Abstract

A spinning nozzle for an air-jet spinning machine has a base body with an internal turbulence chamber, an inlet opening for the fiber sliver which enters the turbulence chamber and a fiber guide channel for guiding the fiber sliver entering the inlet opening. A thread-forming element extends at least partially into the turbulence chamber and has an inlet mouth as well as an adjoining take-off channel for the thread in the transport direction. Air nozzles are directed into the turbulence chamber. The spinning nozzle has an extension piece that is releasably fixed to the base body in the region of the inlet opening, wherein the fiber guide channel adjoining the inlet opening is formed at least partially by a channel section of the extension piece.

First claim

The invention claimed is:

1. A spinning nozzle for an air-jet spinning machine that produces a thread from a fiber sliver, comprising:
a base body with an internal turbulence chamber;
an inlet opening through which the fiber sliver enters the turbulence chamber in a transport direction of the fiber sliver through the air-jet spinning machine;
a fiber guide channel disposed between the inlet opening and the turbulence chamber to guide the fiber sliver entering the inlet opening;
a thread-forming element disposed at least partially into the turbulence chamber and having an inlet mouth and a take-off channel for the thread in the transport direction;
air nozzles directed so as to open into the turbulence chamber in the region of a wall that encompasses the turbulence chamber; and
an extension piece formed separate from and releasably attached to the base body in the region of the inlet opening, the fiber guide channel formed at least partially by a channel section of the extension piece.

2. The spinning nozzle as in claim 1 , wherein fiber guide further comprises a channel section formed in the base body that adjoins the channel section in the extension piece.

3. The spinning nozzle as in claim 1 , wherein the extension piece is engaged on the base body in one of an interlocking connection or a frictional connection that counteracts movement of the extension piece relative to the base body.

4. The spinning nozzle as in claim 1 , wherein the extension piece comprises a base element and an insert configured within the base element, wherein the insert is in contact with a fiber guide element within the base body, and wherein the insert and the fiber guide element jointly define at least a portion of the fiber guide channel.

5. The spinning nozzle as in claim 1 , wherein the extension piece comprises a concave surface section extending perpendicular to the transport direction and aligned to follow a contour of a cylindrical sleeve adjacent the extension piece.

6. The spinning nozzle as in claim 5 , wherein the insert has a length (L 1 ) extending in the transport direction between 1 mm and 100 mm.

7. The spinning nozzle as in claim 6 , the fiber guide channel has a length (L 2 ) extending in the transport direction between 6 mm and 110 mm.

8. A spinning station of an air-jet spinning machine, wherein the spinning station comprises a spinning nozzle as set forth in claim 1 , and further comprising a delivery roller pair disposed before the spinning nozzle in the transport direction.

9. The spinning station as in claim 8 , wherein the extension piece has a concave surface section extending perpendicular to the transport direction adjacent to a sleeve surface of a first roller of the delivery roller pair, and wherein the concave surface section and the sleeve surface are concentric.

10. The spinning station as in claim 9 , wherein the concave surface section has a width (B 1 ) in a direction perpendicular to the transport direction, the sleeve surface of the first roller has a width (B 2 ), and wherein a ratio between (B 1 ) and (B 2 ) lies between 0.2 and 5.

11. The spinning station as in claim 10 , wherein the extension piece has a flat second surface section adjacent to the concave surface section, the second surface section adjacent to a sleeve surface of a second roller of the delivery roller.

12. The spinning station as in claim 11 , wherein a normal to the second surface section defies an angle α with a longitudinal axis of the fiber guide channel extending in the transport direction between 0° and 60°.

13. The spinning station as in claim 11 , wherein a gap with distance A 1 is defined between the first roller and the concave surface section, and a gap with distance (A 2 ) is defined between the second roller and the second surface section, wherein the distance (A 1 ) is less than the distance (A 2 ).

14. The spinning station as in claim 13 , wherein the distance (A 1 ) is between 0.1 mm and 5 mm, and the distance (A 2 ) is between 0.5 mm and 10 mm.

15. The spinning station as in claim 11 , wherein the concave surface section and the second surface section are joined by an intermediate surface having a width (B 3 ) running perpendicular to the transport direction, wherein a ratio between (B 2 ) and (B 3 ) is between 0.2 and 5, and the intermediate surface has a height (H) running perpendicular to the transport direction and perpendicular to the width (B 3 ) between 0 mm and 12 mm.

Assignees

• Rieter Ag Maschf

Inventors

• Griesshammer Christian
• Haska Petr
• Betz Dorothee
• Küppers Simon

Classifications

• D01H7/92

  for imparting transient twist {, i.e. false twist (D01H1/11 takes precedence)} · CPC title

• D01H1/115 Primary

  using pneumatic means · CPC title

• D01H4/02 Primary

  imparting twist by a fluid, e.g. air vortex · CPC title