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US 2004/0016223 A1Published application
Tunnel cladding
AssigneeMaschinenfabrik Rieter AG
InventorsHerbert Stalder, Olivier Wust
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AssigneeMaschinenfabrik Rieter AG
InventorsHerbert Stalder, Olivier Wust
Estimating the term…
The application relates to a device for air spinning, i.e. for the manufacture of a spun thread (10) from a staple sliver (1, 24). The device contains in particular a fibre guide element (3, 22), a fibre conveying channel (4), and an eddy chamber housing (15) attached to the fibre guide element (3, 22). The eddy chamber housing (15) contains in its turn a spindle (7) arranged at a distance interval from the fibre guide element (3, 22), with a yarn guide channel (8). In addition, the eddy chamber housing (15) contains a fluid device with at least one jet nozzle (13.1) for the production of an eddy current (11) about the inlet aperture mouth (9) of the yarn guide channel. According to the invention, the fibre conveying channel (4) exhibits a tunnel cladding (17, 26, 27, 28), which is dimensioned in such a way that at the end of the fibre conveying channel (4) a step to the eddy chamber housing (15) is formed, whereby the front face of the step (18, 29, 30, 31) serves as a deflection guide surface for the fluid, which emerges from the nozzle jet(s) (13.1).
A device for the manufacture of a spun fibre or thread from a staple sliver, containing a fibre guide element, a fibre conveying channel, an eddy chamber housing connected to the fibre guide element, whereby the fibre guide element exhibits a face surface which delimits the eddy chamber which is formed, the eddy chamber housing contains a spindle with a yarn guide channel allocated in a distance to the fibre guide element, whereby the eddy chamber housing contains a fluid device with at least one jet nozzle for creating an eddy current around the intake aperture mouth of the yarn guide channel,
The device according to one of the foregoing claims, characterised in that the shoulder (18, 29, 30) is arranged flush with the mouth aperture of the jet nozzle (13.1).
The device according to one of the foregoing claims, characterised in that the front face (20, 21) of the fibre guide element (3, 22) in the eddy chamber (14.1) and/or the hole of each nozzle jet (13.1) exhibits an inclination angle (α) of 45 to 88 degrees or 58 to 75 degrees, for preference 70 degrees of 60 degrees to the direction of the material flow (19).
The device according to one of the foregoing claims, characterised in that the distance interval (d) between the step (31) and the centre point of the hole of the jet nozzle (13.1) or jet nozzles amounts to 0.9 mm to 1.3 mm, and for preference 1.1 mm.
The device according to one of the foregoing claims, characterised in that the eddy chamber housing (15) exhibits a circular inner surface and the hole of each jet nozzle (13.1) passes tangentially flush into the cross-section of the eddy chamber housing (15).
The device according to one of the foregoing claims, characterised in that the fibre guide surface (16) exhibits a deflection point (23), which causes a deflection of the staple sliver (24), and for preference the deflection point (23) is formed as a supplementary edge.
Dependencies are inferred from the claim text.