Suction channel end part, production method and drafting system comprising such a suction channel end part

Abstract

A suction channel end part for removing fiber flight in the region of a drafting system by the application of negative pressure, the suction channel end part having a first component, to which negative pressure is applied and which has an inlet and an outlet communicating with the inlet. The suction channel end part is characterised in that the suction channel end part has a second component, which is designed as a cover element and to which negative pressure is applied and which can be exchangeably connected to the first component. The second component has an opening, which, in the joined state of the suction channel end part, forms a suction port, which communicates with the inlet and via which the fiber flight is removed into the suction channel end part when a negative pressure is applied.

What is claimed is: 
     
         1 . A suction channel end part for removing fiber flight in the region of a drafting system by applying negative pressure, the suction channel end part comprising a first component, to which negative pressure is applied and which has an inlet and an outlet communicating with the inlet,
 characterised in that   the suction channel end part has a second component, which is a cover element and to which negative pressure is applied and which is exchangeably connected to the first component, the second component having an opening, which, in the joined state of the suction channel end part, forms a suction port, which communicates with the inlet and via which the fiber flight is removed into the suction channel end part when a negative pressure is applied.   
     
     
         2 . The suction channel end part according to  claim 1 , characterised in that the second component has more than one opening, the openings forming, in the joined state of the suction channel end part, suction ports that communicate with the inlet or with an associated inlet of a plurality of inlets formed together with the first component. 
     
     
         3 . The suction channel end part according to  claim 1 , characterised in that the suction channel end part has more than one second component each having at least one opening, each opening forming, in the joined state of the suction channel end part, a suction port that communicates with the inlet or with an associated inlet of a plurality of inlets formed together with the first component. 
     
     
         4 . The suction channel end part according to  claim 2 , characterised in that the suction channel end part is dimensioned suitably for applying suction air to at least two roller pairs of the drafting system, at least one suction port being associated with at least one roller of each roller pair. 
     
     
         5 . The suction channel end part according to  claim 1 , characterised in that the suction channel end part comprises at least one fastening for stationary fastening in the region of the drafting system. 
     
     
         6 . The suction channel end part according to  claim 1 , characterised in that the suction channel end part comprises a funnel, which is tapered towards the opening. 
     
     
         7 . The suction channel end part according to  claim 6 , characterised in that the funnel is formed by an insert, which is exchangeably fastened in or at the opening. 
     
     
         8 . A method for producing a suction channel end part for removing fiber flight in the region of a drafting system by applying negative pressure, the suction channel end part comprising a first component, to which negative pressure is applied and which has an inlet and an outlet communicating with the inlet, the method comprising:
 producing at least one part of the suction channel end part using a 3D printing method, a laser sintering method or a plastics injection-molding method,   wherein the suction channel end part has a second component, which is a cover element and to which negative pressure is applied and which is exchangeably connected to the first component, the second component having an opening, which, in the joined state of the suction channel end part, forms a suction port, which communicates with the inlet and via which the fiber flight is removed into the suction channel end part when a negative pressure is applied.   
     
     
         9 . A drafting system comprising a plurality of a roller pairs for the defined drafting of a fed fiber band,
 characterised in that   a suction channel end part is arranged in the region of the drafting system, wherein the suction channel end part for removing fiber flight in the region of a drafting system by applying negative pressure, the suction channel end part comprising a first component, to which negative pressure is applied and which has an inlet and an outlet communicating with the inlet, wherein the suction channel end part has a second component, which is a cover element and to which negative pressure is applied and which is exchangeably connected to the first component, the second component having an opening, which, in the joined state of the suction channel end part, forms a suction port, which communicates with the inlet and via which the fiber flight is removed into the suction channel end part when a negative pressure is applied.   
     
     
         10 . The drafting system according to  claim 9 , characterised in that, in a side view of the drafting system, the suction channel end part is arranged at least with one opening centered with respect to one roller of an associated roller pair.