Roller for the drafting equipment of a spinning mill machine

Abstract

A roller for drafting equipment of a spinning mill machine with an oblong cylindrical base body ( 102 ) is claimed characterized in that a hollow space ( 106 ) is provided in the base body ( 102 ). In this manner the heat transfer from the roller bearing via the base body to a roller covering on the base body can be reduced considerably. Under another aspect of the invention a roller with an oblong cylindrical base body provided with an outer roller covering essentially surrounding the circumference of the base body, whereby at least one thermally insulating layer is installed between the base body and the roller covering, serves the same purpose. In addition the invention also comprises a spinning mill machine with at least one such roller as well as a corresponding process.

1 . Roller for drafting equipment of a spinning mill machine with an oblong cylindrical base body ( 102 ), characterized in that a hollow space ( 106 ) is provided in the base body ( 102 ).  
     
     
         2 . Roller as in  claim 1 , characterized in that the base body ( 102 ) is made in form of a hollow shaft.  
     
     
         3 . Roller as in  claim 1  or  2 , characterized in that the hollow space ( 106 ) extends essentially along the base body ( 102 ).  
     
     
         4 . Roller as in one of the preceding claims, characterized by a roller covering ( 4 ) essentially surrounding the outer circumference surface of the base body ( 102 ).  
     
     
         5 . Roller as in one of the preceding claims, characterized in that the hollow space ( 106 ) extends in axial direction through axle journals ( 10 ) connected at the faces.  
     
     
         6 . Roller as in one of the preceding claims, characterized in that the hollow space ( 106 ) is designed to receive a cooling medium.  
     
     
         7 . Roller as in one of the preceding claims, characterized in that the cooling medium (K) is a fluid, in particular water.  
     
     
         8 . Roller as in one of the preceding claims, characterized in that the hollow space ( 106 ) is closed.  
     
     
         9 . Roller as in one of the  claims 1  to  7 , characterized in that the hollow space ( 106 ) is open.  
     
     
         10 . Roller as in one of the preceding claims, characterized in that the cooling medium (K) has in addition lubricating properties and can be used in addition to cooling, at the same time for bearing lubrication of the roller bearings ( 11 )  
     
     
         11 . Roller for drafting equipment of a spinning mill machine with an oblong cylindrical base body ( 2 ) and with an outer roller covering ( 5 ) essentially surrounding the circumference surface of the base body ( 2 ), characterized in that that at least one thermally insulating layer ( 3 ) is provided between the base body ( 2 ) and the roller covering ( 5 ).  
     
     
         12 . Roller as in  claim 11 , characterized in that the roller covering ( 5 ) is installed on a metal structure ( 4 ), preferably made of aluminum, which is pressed on the base body ( 2 ).  
     
     
         13 . Roller as in  claim 11  or  12 , characterized in that the layer ( 3 ) (at least one) is installed on the base body ( 2 ) or on the inside of the metal structure ( 4 ).  
     
     
         14 . Roller as in one of the  claims 11  to  13 , characterized in that the (at least one) layer ( 3 ) contains a plastic material or a compound material.  
     
     
         15 . Roller as in one of the  claims 1  to  10  as well as according to one of the  claims 11  to  14 .  
     
     
         16 . Spinning mill machine with drafting equipment having upper and lower rollers ( 22 ,  23 ,  24 ,  25 ,  26 ,  27 ,  28 ;  1 ;  101 ) characterized in that at least one of the rollers ( 22 ,  23 ,  24 ,  25 ,  26 ,  27 ,  28 ;  1 ;  101 ) is designed according to one of the  claims 1  to  15 .  
     
     
         17 . Spinning mill machine as in  claim 16 , characterized by means to move the cooling medium (K) in a cricuit.  
     
     
         18 . Spinning mill machine as in  claim 16  or  17 , characterized by cooling elements located outside the rollers ( 22 ,  23 ,  24 ,  25 ,  26 ,  27 ,  28 ;  1 ;  101 ) to cool the cooling medium (K).  
     
     
         19 . Process for the cooling of at least one roller ( 22 ,  23 ,  24 ,  25 ,  26 ,  27 ,  28 ) of drafting equipment ( 20 ) of a spinning mill machine, characterized in that a cooling medium (K) is conveyed through a hollow space ( 106 ) in the (at least one) roller ( 22 ,  23 ,  24 ,  25 ,  26 ,  27 ,  28 ;  1 ;  101 )  
     
     
         20 . Process as in  claim 19 , characterized in that a medium is used as the cooling medium (K) that is used at the same time for the bearing lubrication of the roller bearings ( 11 ).  
     
     
         21 . Process as in  claim 19  or  20 , characterized in that the cooling medium (K) is cooled by means of cooling elements after being conveyed through the (at least one) roller ( 22 ,  23 ,  24 ,  25 ,  26 ,  27 ,  28 ;  1 ;  101 ) and is thereupon conveyed again to at least one roller ( 22 ,  23 ,  24 ,  25 ,  26 ,  27 ,  28 ).