Device with means for avoiding the condensation of water in cans filled with sliver

Abstract

A device with a drafting device ( 3 ) for drafting at least one sliver (FB) supplied to the drafting device ( 3 ) comprises a sliver depositing apparatus ( 4 ) downstream from the drafting device ( 3 ) for depositing the drafted sliver (FB′) into a can ( 6 ). Furthermore, the device comprises a can replacement device ( 15 ) for replacing a filled can ( 6 ′) by a can ( 6 ) to be filled. Means ( 17 ) is provided on the device for lowering the temperature (T) and/or the relative moisture (LF) of the fibrous material (FB, FB′) before or after it is deposited in the can ( 6 ). Furthermore, means ( 17 ) for raising the temperature T U of the machine parts ( 13, 20 ) that make contact with the uppermost sliver layers (BL) in the filled can ( 6 ′) can be provided, with which means ( 17 ) a condensation of water on the cited machine parts ( 13, 20 ) is at least reduced. A combination of a card ( 1 ) with a drafting device ( 3 ) comprises a sliver depositing apparatus ( 4 ), downstream from the drafting device ( 3 ), for depositing the drafted sliver (FB′) into a can ( 6 ) as well as comprises a can replacement device ( 15 ). During the replacement of a filled can ( 6 ′) by a can ( 6 ) to be filled the filled can ( 6 ′) is pushed from the filling position ( 18 ) to an adjacent ejection position ( 19 ). No machine part ( 13, 20 ) covering and touching the uppermost sliver layers (BL) is provided in the ejection position ( 19 ) in order to avoid a condensation of water.

1 . A device with a drafting device ( 3 ) for drafting at least one sliver (FB) supplied to the drafting device ( 3 ), with a sliver depositing apparatus ( 4 ) downstream from the drafting device ( 3 ) for depositing the resulting, drafted sliver (FB′) into a can ( 6 ) as well as with a can replacement device ( 15 ) for replacing a filled can ( 6 ′) with a can to be filled ( 6 ), which filled can ( 6 ′) is pushed from the filling position ( 18 ) to an ejection position ( 19 ), characterized by means ( 17 ) for lowering the temperature (T) and/or the relative moisture (LF) of the fibrous material (FB, FB′) before or after it is deposited in the can ( 6 ) and/or by means ( 17 ) for raising the temperature (T U ) of the machine parts ( 13 ,  20 ) that make contact with the uppermost sliver layers (BL) in the filled can ( 6 ′) in the ejection position ( 19 ), with which a condensation of water on the cited machine parts ( 13 ,  20 ) is at least reduced.  
   
   
       2 . The device according to the previous claim, characterized in that a sliver-producing apparatus, in particular a card ( 1 ), is connected in front of the drafting device ( 3 ) which apparatus directly supplies an individual sliver (FB) to the drafting device ( 3 ) without an intermediate depositing.  
   
   
       3 . The device according to one of the previous claims, characterized in that it is designed as a draw frame ( 2 ) and that the sliver-producing apparatus is a card ( 1 ) connected in front.  
   
   
       4 . The device according to one of the previous claims, characterized in that it comprises the drafting device ( 3 ) and the sliver-producing apparatus, in particular a card ( 1 ).  
   
   
       5 . The device according to one of the previous claims, characterized in that the means ( 17 ) for lowering the temperature (T) and/or the relative moisture (LF) of the fibrous material (FB, FB′) is arranged after the drafting device ( 3 ).  
   
   
       6 . The device according to one of the previous claims, characterized in that the means ( 17 ) for raising the temperature of these machine parts ( 13 ,  20 ) comprises at least one heating apparatus ( 21 ) by means of which the temperature (T U ) of the machine parts ( 13 ,  20 ) can be raised in such a manner that the state point (Z 2 ) of the air in the state diagram for moist air (Mollier diagram) is raised above the dew-point curve (TL).  
   
   
       7 . The device according to one of the previous claims, characterized in that the heating apparatus ( 21 ) comprises at least one heating foil ( 22 ).  
   
   
       8 . The device according to one of the previous claims, characterized in that the temperature of these machine parts ( 13 ,  20 ) can be controlled or regulated by the heating apparatus ( 21 ).  
   
   
       9 . The device according to one of the previous claims, characterized in that the heating device ( 21 ) is arranged between a plate ( 13 ) of the carrier frame ( 23 ) and said machine part ( 20 ), that is designed in an areal manner and makes contact with the uppermost layers (BL) of the sliver (FB′).  
   
   
       10 . The device according to one of the previous claims, characterized in that the machine part ( 20 ) is designed as a sliding sheet, e.g. in the form of a noble-steel plate or a ceramic plate, as a coating or as some other covering of the carrier frame plate ( 13 ).  
   
   
       11 . The device according to one of the previous claims, characterized in that at least one passage opening communicating with the ambient air is provided in the machine part ( 13 ,  20 ).  
   
   
       12 . The device according to one of the previous claims, characterized in that at least one passage opening is provided in the machine part ( 13 ,  20 ) which opening is connected to an apparatus ( 25 ) for supplying room air or conditioned air, e.g., from an air conditioning unit, into the interior of the can.  
   
   
       13 . The device according to one of  claims 1  to  4 , characterized in that the means ( 17 ) for lowering the temperature and/or the relative moisture of the fibrous material before it is deposited in the can ( 6 ) comprises at least one cooling apparatus ( 27 ) that is capable of cooling the fibrous material (FB, FB′) before, in and/or after the drafting device ( 3 ).  
   
   
       14 . The device according to one of the previous claims, characterized in that the cooling apparatus ( 27 ) cooperates with a structural component that makes contact with the fibrous material (FB, FB′) during operation of the device.  
   
   
       15 . The device according to one of the previous claims, characterized in that the cooling apparatus ( 27 ) is arranged on a sliver forming unit ( 5 ) connected in after the drafting device ( 3 ) in which the drafted fibrous material is combined to a sliver (FB′).  
   
   
       16 . The device according to one of the previous claims, characterized in that the cooling apparatus ( 27 ) is designed for supplying a gas or gaseous mixture that is cooler than the ambient temperature (T U ) through bores ( 29   a ,  29   b ) or slits of the sliver forming unit ( 5 ) into its inner space ( 30 ) through which the fibrous material (FB′) passes.  
   
   
       17 . The device according to one of the previous claims, characterized in that the cooling apparatus ( 27 ) is arranged between the sliver-producing apparatus, in particular a card ( 1 ), and the drafting device ( 3 ).  
   
   
       18 . The device according to one of the previous claims, characterized in that the cooling apparatus ( 27 ) comprises one or more Peltier elements.  
   
   
       19 . A machine part ( 20 ), especially a carrier frame plate ( 13 ), of a device with a drafting device ( 3 ), a sliver depositing apparatus ( 4 ) for depositing a sliver (FB′) drafted in the drafting device ( 3 ) into a can ( 6 ) as well as with a can replacement device ( 15 ) for replacing a filled can ( 6 ′) with a can to be filled ( 6 ), which filled can ( 6 ′) is pushed from the filling position ( 18 ) to an ejection position ( 19 ), which machine part ( 13 ,  20 ) makes contact with the uppermost sliver layers (BL) of the filled can ( 6 ′) in the ejection position ( 19 ), characterized in that means ( 17 ) for raising the temperature (T U ) of the machine part ( 13 ,  20 ) is provided with which a condensation of water on the machine part ( 13 ,  20 ) is at least reduced.  
   
   
       20 . The machine part ( 13 ,  20 ) according to the previous claim, characterized in that a heating apparatus ( 21 ) is arranged on the machine part ( 13 ,  20 ) as means ( 17 ) for raising the temperature T U  of the machine part ( 13 ,  20 ).  
   
   
       21 . The machine part ( 13 ,  20 ) according to the previous claim, characterized in that the heating apparatus ( 21 ) comprises a heating foil ( 22 ).  
   
   
       22 . The machine part ( 20 ) according to one of  claims 19  to  21 , characterized in that the machine part ( 20 ) that makes contact with the uppermost sliver layers (BL) is a sliding plate or a covering arranged on the carrier frame plate ( 13 ).  
   
   
       23 . The machine part ( 20 ) according to one of  claims 19  to  22 , characterized in that the heating apparatus ( 21 ) is arranged between the machine part ( 20 ), that makes contact with the uppermost sliver layers (BL), and the carrier frame plate ( 13 ).  
   
   
       24 . A machine part ( 20 ), in particular a carrier frame plate ( 13 ), of a device with a drafting device ( 3 ), a sliver depositing apparatus ( 4 ) for depositing a sliver (FB′) drafted in the drafting device ( 3 ) into a can ( 6 ) as well as with a can replacement device ( 15 ) for replacing a filled can ( 6 ′) with a can to be filled ( 6 ), which filled can ( 6 ′) is pushed from the filling position ( 18 ) to an ejection position ( 19 ), which machine part ( 13 ,  20 ) makes contact with the uppermost sliver layers (BL) of the filled can ( 6 ′) in the ejection position ( 19 ), characterized in that at least one passage opening is arranged in the machine part ( 13 ,  20 ) in order to lower the temperature (T) and/or the relative moisture (LF) of the sliver (FB′) and to prevent the condensation of water on the machine part ( 13 ,  26 ).  
   
   
       25 . The machine part ( 20 ) according to the previous claim, characterized in that the passage opening communicates with the ambient air.  
   
   
       26 . The machine part ( 20 ) according to  claim 24 , characterized in that the passage opening is connected to an apparatus for supplying room air or conditioned air.  
   
   
       27 . A combination of a card ( 1 ) with a drafting device ( 3 ) for drafting at least one sliver (FB) supplied to the drafting device ( 3 ) directly from the card ( 1 ), with a sliver depositing apparatus ( 4 ) downstream from the drafting device ( 3 ) for depositing the resulting, drafted sliver (FB′) into a can ( 6 ) as well as with a can replacement device ( 15 ) for replacing a filled can ( 6 ′) with a can to be filled ( 6 ), which filled can ( 6 ′) is pushed from the filling position ( 18 ) to an adjacent ejection position ( 19 ), characterized in that no machine part ( 13 ,  20 ) covering and touching the uppermost sliver layers (BL) is provided in the ejection position.