Patent DE-102006012335-A1 (DE)
Title: Non-woven fiber guidance mechanism for a spinning frame, includes fiber web tunnel and fiber band guidance mechanism comprising fiber band guidance channel for guiding the fiber band leaving the tunnel to a fiber band-withdrawal mechanism
Inventor: GOEHLER WOLFGANG
IPC: D01H5/72
Filed: 2006-03-17
Abstract: The non-woven fiber guidance mechanism for a spinning frame, includes a fiber web tunnel (21) and a fiber band guidance mechanism (24) comprising guidance channel for guiding the fiber band leaving the tunnel to a band-withdrawal mechanism (26). The non-woven fiber material (FV) is arranged at the outlet of a spread non-woven fiber-drawing frame (2) of a textile machine. The fiber web tunnel unites the supplied non-woven to a fiber band and comprises a funnel region and a nozzle channel attached downstream to the funnel region. The withdrawal mechanism comprises a draw-off disk arrangement. The non-woven fiber guidance mechanism for a spinning frame, includes a fiber web tunnel (21) and a fiber band guidance mechanism (24) comprising guidance channel for guiding the fiber band leaving the tunnel to a band-withdrawal mechanism (26). The non-woven fiber material (FV) is arranged at the outlet of a spread non-woven fiber-drawing frame (2) of a textile machine. The fiber web tunnel unites the supplied non-woven to a fiber band and comprises a funnel region and a nozzle channel attached downstream to the funnel region. The withdrawal mechanism comprises a draw-off disk arrangement. The tunnel is horizontally displaceable with respect to the fiber band guidance mechanism, from an operating position to a maintenance position. In the operating position, the nozzle channel and the guidance channel form a continuous guidance channel and are joined airtight together with one another. In the operating position, a sealing surface of the fiber web tunnel that is formed at the exit of the nozzle channel and a sealing surface of the guidance channel that is formed at the entrance of the fiber band guidance mechanism are joined together without an extra sealing means. The sealing surfaces are formed at an element of the tunnel made of metal and glide along one another during displacement of the fiber web tunnel. The fiber web tunnel can be displaced perpendicular to the channel. At the output-sided frontal surface of the fiber web tunnel, a gliding surface of the fiber web tunnel, which is supported by a gliding surface of the fiber band guidance mechanism that is formed at the input of the fiber band guidance mechanism, is formed. Retaining means are intended, which act against the lifting up of the gliding surface of the tunnel from that of the fiber band guidance mechanism, in the operating position. The retaining means comprises a permanent magnet. Mechanical stops are intended to prevent displacement of the fiber web tunnel from the operating position against an intended displacement direction. Lateral guidance means are intended to prevent an inclined displacement of the fiber web tunnel to the intended displacement direction. A fiber web tunnel positioning mechanism for fixing the tunnel in the operating position, is intended. The positioning mechanism comprises a locking element, a clamping element and/or a permanent magnet. The guidance mechanism is formed in such a manner that a web reel forming itself at an output roller of the device, displaces the fiber web tunnel from the operating position. At the fiber web tunnel, a surface is formed, which can be fed to the output roller in such a manner that a developing web reel exerts forces to displace the fiber web tunnel on to the surface. A fiber web tunnel sensor is intended to determine the position of the fiber web tunnel. In the operating position, output-sided section of the nozzle channel and an input-sided section of the fiber band guidance channel are coaxially arranged, so that the fiber band is led rectilinearly from the nozzle channel to the fiber band guidance channel. The fiber band guidance channel is formed in such a manner that the fiber band is led rectilinearly in the fiber band guidance channel. The fiber band guidance channel is airtight in the radial direction. The nozzle channel is formed in such a manner that the fiber band is led rectilinearly in the nozzle channel. The nozzle channel is airtight in the radial direction. The continuous guidance channel is formed without sudden changes in the cross-section and is composed from cylindrical sections and from truncated cone-shaped sections. The fiber band guidance mechanism comprises of a section for compression of the fiber band. The nozzle channel is a component of the nozzle of the fiber web tunnel that is formed as a replaceable insert for the fiber web tunnel. The fiber band guidance channel is a component of the fiber band guidance of the fiber web tunnel that is formed as a replaceable insert for the fiber band guidance mechanism. The funnel region of the fiber web tunnel exhibits a long lateral wall, which is formed by a cover plate, which is slidable or tiltable with respect to a base structure of the fiber web tunnel from an operating position (B2) to a maintenance position. A cover plate positioning mechanism is intended for fixing the cover plate in the operating position. The cover plate positioning mechanism comprises a locking element, a clamping element and/or a permanent magnet. The fiber web tunnel is formed in such a manner that non-woven fiber material accumulating itself within the funnel region presses off the cover plate from the operating position. A cover plate sensor is intended for the determination of the position of the cover plate with respect to a base structure of the fiber web tunnel and with respect to the fiber band guidance mechanism. Pneumatic loading means are assigned to the withdrawal mechanism. Means for the bundled passage of the non-woven fiber material into the guidance mechanism is intended by means of compressed air. An injector arrangement is assigned to the fiber band guidance mechanism. An intended delivery direction of the fiber band deviates from an intended feed direction of the non-woven fiber material by less than 10[deg]. The fiber band guidance mechanism exhibits a base structure, which is movable with respect to the withdrawal mechanism from an operating position to a maintenance position. The base structure is formed as a sliding or tilting plate. An independent claim is included for a textile machine.