Core for a spinning bobbin and method of producing the core

Abstract

The invention relates to a core ( 10 ) for a spinning bobbin and for receiving a windable material. The core ( 10 ) consists of wound strip material ( 11 ). Adjacently lying portions of the strip material ( 11 ) overlap one another. Production is performed by winding on a winding mandrel ( 14 ).

1 . Core ( 10 ) for a spinning bobbin and for receiving a windable material, characterized by a construction from wound strip material ( 11 ).  
     
     
         2 . Core according to  claim 1 , characterized in that adjacently lying portions of the strip material ( 11 ) are permanently joined to one another.  
     
     
         3 . Core according to  claim 1 , characterized in that adjacently lying portions of the strip material ( 11 ) at least partially overlap one another.  
     
     
         4 . Core according to  claim 2 , characterized in that edges ( 22 ,  23 ) of the strip material ( 11 ) lying opposite one another form the portions lying opposite one another.  
     
     
         5 . Core according to  claim 4 , characterized in that the edges ( 22 ,  23 ) of the strip material ( 11 ) lying opposite one another are made thinner than a central region ( 24 ) of the same and in that the thinner edges ( 22 ,  23 ) at least partially overlap one another.  
     
     
         6 . Core according to  claim 1 , characterized in that the strip material ( 11 ) has a flat, rectangular cross section.  
     
     
         7 . Core according to  claim 1 , characterized in that the strip material ( 11 ) is reinforced.  
     
     
         8 . Core according to  claim 1 , characterized in that the strip material ( 11 ) consists of least partially of plastic.  
     
     
         9 . Core according to  claim 1 , characterized in that the strip material ( 11 ) is helically wound.  
     
     
         10 . Core according to  claim 1 , characterized in that the strip material ( 11 ) is annularly wound.  
     
     
         11 . Core according to  claim 1 , characterized in that a number of rings ( 34 ,  35 ) of strip material ( 11 ) are joined to one another, lying axially adjacent to one another, for the forming of the core ( 10 ).  
     
     
         12 . Core according to  claim 11 , characterized in that neighbouring rings ( 34 ,  35 ) have peripheral end faces ( 32 ,  33 ) positively engaging in one another and regions of the end face ( 32 ) of one ring ( 34 ,  35 ) bear against regions of the end face ( 33 ) of the neighbouring ring ( 34 ,  35 ).  
     
     
         13 . Core according to  claim 12 , characterized in that the end faces ( 32 ,  33 ) are peripherally profiled.  
     
     
         14 . Core according to  claim 12 , characterized in that the end faces ( 32 ,  33 ) are peripherally stepped.  
     
     
         15 . Method of producing a core ( 10 ) for a spinning bobbin, characterized in that the core ( 10 ) is produced by the winding method, a flat strip material ( 11 ) being wound and thus forming the core ( 10 ) extending in the direction of a winding axis ( 17 ).  
     
     
         16 . Method according to  claim 15 , characterized in that the strip material ( 11 ) is wound onto a winding mandrel ( 14 ).  
     
     
         17 . Method according to  claim 15 , characterized in that the strip material ( 11 ) is supplied for winding in a position fixed in relation to the direction of a winding axis ( 17 ) and in that a free end ( 20 ) of the wound core ( 10 ) travels in the direction of the winding axis ( 17 ).  
     
     
         18 . Method according to  claim 17 , characterized in that a cutting device ( 18 ) for severing at least portions of a defined length of the core ( 10 ) travels in the direction of the winding axis ( 17 ) during the severing operation.  
     
     
         19 . Method according to  claim 15 , characterized in that portions of a defined length are severed from a free end of a wound package ( 19 ) produced by the winding for the forming of at least part of the desired core ( 10 ).  
     
     
         20 . Method according to  claim 18 , characterized in that cut faces produced by the severing of portions from a wound package ( 19 ) are smoothed.  
     
     
         21 . Method according to  claim 15 , characterized in that the strip material ( 11 ) is wound with at least partial overlapping of neighbouring portions.  
     
     
         22 . Method according to  claim 21 , characterized in that the strip material ( 11 ) is permanently joined in the region of the overlapping.  
     
     
         23 . Method according to  claim 15 , characterized in that a number of rings ( 34 ,  35 ) of wound strip material ( 11 ) are joined to one another, lying adjacent to one another in the axial direction, for the forming of the core ( 10 ).