Packaging machine for producing a packaging, and method for producing same

Abstract

The invention relates to a packaging machine for producing a packaging (20) from a paper-containing web material (2) and a covering web (3), comprising a first pre-tensioning device (4) for pre-tensioning and stretching the web material (2) in a transport direction (16) of the web material, a second pre-tensioning device (5) for pre-tensioning and stretching the web material (2) in a second direction (17) transverse to the transport direction (16), a shaping device (6) for producing a depression (21) in the web material (2), wherein the depression (21) is designed to receive a filler, a filling device (7) which fills filler into the depression (21), a covering web device which provides the covering web (3) in order to provide a cover (31) for the depression (21), a fixing device (10) which fixes the covering web (3) on the web material (2), and a discharge device (8) which discharges the produced packaging out of the packaging machine.

1 . A packaging machine for producing a package ( 20 ) from a web material ( 2 ) comprising paper and a covering web ( 3 ), with
 a first pretensioning device ( 4 ) for pretensioning and expanding the web material ( 2 ) in a transporting direction ( 16 ) of the web material,   a second pretensioning device ( 5 ) for pretensioning and expanding the web material ( 2 ) in a second direction ( 17 ) transverse to the transporting direction ( 16 ),   a forming device ( 6 ) for producing a depression ( 21 ) in the web material ( 2 ), wherein the depression ( 21 ) is configured to receive a filling,   a filling device ( 7 ) which places the filling into the depression ( 21 ),   a covering web device which provides the covering web ( 3 ) for providing a cover ( 31 ) for the depression ( 21 ),   a fixing device ( 10 ) which fixes the covering web ( 3 ) on the web material ( 2 ), and   an output device ( 8 ) which outputs the produced package from the packaging machine.   
     
     
         2 . The packaging machine as claimed in  claim 1 , wherein the first pretensioning device ( 4 ) is arranged upstream from the second pretensioning device ( 5 ), in the transporting direction ( 16 ) of the web material ( 2 ). 
     
     
         3 . The packaging machine as claimed in  claim 1 , wherein the first pretensioning device ( 4 ) comprises a draw roll device ( 40 ) with a first draw roll ( 41 ) and a second draw roll ( 42 ), between which the web material ( 2 ) is guided, and a pretensioning roll ( 45 ), wherein the pretensioning roll ( 45 ) can be moved perpendicular to a center axis of the pretensioning roll 
     
     
         4 . The packaging machine as claimed in  claim 3 , further comprising a dancer roll arrangement ( 44 ) with a first, second, and third roll, wherein one of the rolls is the pretensioning roll ( 45 ) and another of the rolls is the first draw roll ( 41 ). 
     
     
         5 . The packaging machine as claimed in  claim 1 , wherein the second pretensioning device ( 5 ) comprises a plurality of retaining grippers ( 50 ) which are arranged on the sides of the web material ( 2 ). 
     
     
         6 . The packaging machine as claimed in  claim 1 , wherein the forming device ( 6 ) comprises a die ( 62 ), a hold-down clamp ( 61 ), a punch ( 63 ), and a final forming device for the final forming of the formed depression ( 21 ) from the die ( 62 ). 
     
     
         7 . The packaging machine as claimed in  claim 1 , further comprising a third pretensioning device ( 9 ) which pretensions and expands the covering web ( 3 ) in a transporting direction ( 18 ) of the covering web. 
     
     
         8 . The packaging machine as claimed in  claim 1 , wherein a material of the covering web ( 3 ) comprises paper or wherein the covering web ( 3 ) is produced completely from paper. 
     
     
         9 . The packaging machine as claimed in  claim 1 , wherein the fixing device ( 10 ) is arranged movably in order to enable alignment relative to the depression ( 21 ) formed in the web material ( 2 ). 
     
     
         10 . The packaging machine as claimed in  claim 1 , further comprising a heating device ( 11 ) which is arranged downstream from the first and second pretensioning device ( 4 ,  5 ) and upstream from the forming device ( 6 ), in the transporting device of the web material ( 2 ). 
     
     
         11 . A method for producing a package ( 20 ) from a web material ( 2 ) comprising paper and a covering web ( 3 ), wherein the package has a depression ( 21 ) for receiving a filling, comprising the steps of:
 a first pretensioning and expansion of the web material ( 2 ) in a transporting direction ( 16 ) of the web material,   a second pretensioning of the web material ( 2 ) in a second direction ( 17 ) transversely to the transporting direction ( 16 ),   forming the web material ( 2 ) to produce the depression ( 21 ) in the web material, and   fixing the covering web ( 3 ) on the web material ( 2 ) in order to cover the depression and provide the package.   
     
     
         12 . The method as claimed in  claim 11 , wherein the web material ( 2 ) is unreeled continuously from a web reel ( 22 ) and the first pretensioning of the web material ( 2 ) is effected by a draw roll device ( 40 ), through which the web material ( 2 ) is guided, and a pretensioning roll ( 45 ). 
     
     
         13 . The method as claimed in  claim 11 , wherein the covering web ( 3 ) is pretensioned and expanded before the step of being fixed on the web material ( 2 ) in a transporting direction ( 18 ) of the covering web. 
     
     
         14 . The method as claimed in  claim 11 , wherein the web material ( 2 ) and the covering web ( 3 ) is produced completely from paper and at least the web material ( 2 ) is preheated before a joining step with the covering web ( 3 ).