Opening cylinder for an open-end spinning device

Abstract

The invention relates to an opening cylinder ( 2 ) of an open-end spinning device as well as a fiber sliver opening apparatus with such an opening cylinder. In at least one lateral area ( 6 ) of the opening cylinder ( 2 ) a sealing surface for an air gap seal ( 12 ) is formed. According to the invention the opening cylinder ( 2 ) has an air passage ( 14 ) in at least the one lateral area ( 6 ), the output side of the air passage lying within the sealing surface or adjoining the sealing surface directly and the input side of which being at a shorter distance from the rotational axis of the opening cylinder ( 3 ) than the output side. During the operation of the fiber sliver opening apparatus, air is conveyed through the passages ( 14 ) to the air gap ( 12 ) of the air gap seal arrangement or conveyed past it, so that the entry of air and pollutants into the air gap ( 12 ) is counteracted.

1 . Opening cylinder of an open-end spinning device with at least one sealing surface in a lateral area ( 6 ) for an air gap seal ( 12 ,  27 ,  40 ,  50 ), characterized in that at least in the one lateral area ( 6 ) of the opening cylinder ( 2 ,  23 ) at least one air passage ( 14 ,  14   a ,  14   b ,  14   c ,  30 ,  42 ,  54 ) or air channel is formed, the output side of which is located in the sealing surface or next to the sealing surface and the input side is at a shorter distance from the rotational axis of the opening cylinder ( 2 ,  23 ) than the output side.  
     
     
         2 . Opening cylinder as in  claim 1 , characterized in that the sealing surface is in form of a contour surface.  
     
     
         3 . Opening cylinder as in  claim 1  or  2 , characterized in that a first lateral area ( 6 ) of the opening cylinder ( 2 ,  23 ) is provided with a first sealing surface, and a second lateral area of the opening cylinder ( 2 ,  23 ) is provided with a second sealing surface, whereby at least one air passage or air channel adjoins the first as well as the second sealing surface and/or lets out into it.  
     
     
         4 . Opening cylinder as in  claim 1 ,  2  or  3 , characterized in that the lateral area ( 6 ) is made in form of a separate lateral opening cylinder element comprising the sealing surface.  
     
     
         5 . Opening cylinder as in one of the preceding claims, characterized in that a circumferential collar ( 13 ,  29 ,  41 ,  53 ) is formed at the face of the lateral area ( 6 ), its outer circumference being at least a part of the sealing surface of the opening cylinder ( 2 ,  23 ) and on whose inner circumference and/or lateral surface the inlet side of the air passage ( 14 ,  14   a ,  14   b ,  14   c ,  30 ,  42 ,  54 ) of which at least one is provided is formed.  
     
     
         6 . Opening cylinder as in one of the preceding claims, characterized in that the passages ( 14 ,  14   a ,  14   b ,  30 ,  42 ,  54 ) or air channels extend radially or approximately radially.  
     
     
         7 . Opening cylinder as in one of the preceding claims, characterized in that the passages ( 14   c ) are designed so as to extend helicoidally relative to the rotational axis of the opening cylinder ( 2 ).  
     
     
         8 . Opening cylinder as in one of the preceding claims, characterized in that the passages ( 14   a ,  14   b ,  42 ) extend at least near the outlet side at an angle of less than 90° to the rotational axis of the opening cylinder ( 2 ,  23 ).  
     
     
         9 . Opening cylinder as in one of the preceding claims, characterized in that the cross-section of the passages ( 14   c ) decrease in size towards their output side.  
     
     
         10 . Opening cylinder as in one of the preceding claims, characterized in that the passages adjoining each other are separated from each other by ridges.  
     
     
         11 . Opening cylinder as in one of the preceding claims, characterized by a basic body ( 4 ) attached on a shaft ( 3 ) and an opening cylinder covering element ( 6 ) on which a card clothing ( 5 ) is provided or with which an exchangeable card clothing ( 5 ) can be attached to the basic body ( 4 ) in a detachable manner, whereby the opening cylinder covering element ( 6 ) is provided with the sealing surface.  
     
     
         12 . Opening cylinder covering element for an opening cylinder, on which an exchangeable card clothing can be attached so as to be detachable from the basic body ( 4 ) of the opening cylinder ( 2 ) and provided with a sealing surface for an air gap seal ( 12 ), characterized in that at least one air passage ( 14 ,  14   a ,  14   b ,  14   c ,) or air channel is formed in a lateral area of the opening cylinder covering element ( 6 ), the output side of which lies in the sealing surface or directly adjoins the sealing surface, and the input side of which is at a shorter radial distance from the rotational axis of the opening cylinder ( 2 ,  23 ) than the output side.  
     
     
         13 . Opening cylinder covering element as in  claim 12 , characterized in that that the air passage ( 14 ,  14   a ,  14   b ,  14   c ) or air channel is designed according to one of the  claims 7  to  10 .  
     
     
         14 . Fiber sliver opening apparatus of an open-end spinning device with a housing ( 1 ,  25 ) and an opening cylinder ( 2 ,  23 ) rotatably installed in the housing as in one of the  claims 1  to  11 , whereby the sealing surface (at least one being provided) of the opening cylinder ( 2 ,  23 ) is across from a corresponding sealing surface of the housing ( 1 ,  25 ) with a small air gap ( 12 ,  27 ,  40 ,  50 ) between them.