Method and device for producing a packaging body of packaging
A method for producing a packaging body ( 51 ) from a web material that comprises paper, wherein the packaging body ( 51 ) comprises an indentation ( 53 ) for receiving an item to be packaged, the method comprising: pre-tensioning the web material ( 14 ); fixing the web material ( 14 ) between a holding-down device ( 32 ) and a die ( 31 ); molding the indentation ( 53 ) in the web material ( 14 ); and removing the molded indentation ( 53 ) from the die ( 31 ).
1. A method for producing a packaging body ( 51 ) from a web material that comprises paper, wherein the packaging body ( 51 ) comprises an indentation ( 53 ) for receiving an item to be packaged, said method comprising the steps of:
feeding the web material in a transport direction;
pre-tensioning the web material ( 14 );
fixing the web material ( 14 ) between a holding-down means ( 32 ) and a die ( 31 ),
molding the indentation ( 53 ) in the web material ( 14 ) using a molding device and the die;
removing the molded indentation ( 53 ) from the die ( 31 );
wherein the pre-tensioning step is carried out by clamping jaws ( 3 a , 3 b ) arranged laterally on the web material and a tension roller arrangement ( 36 ) having two rollers ( 3 c , 3 d ), wherein the web material ( 14 ) is passed between the two rollers ( 3 c , 3 d ); and
wherein the tension roller arrangement having two rollers is downstream of the molding device and the die in the transport direction.
2. The method according to claim 1 , wherein the clamping jaws ( 3 a , 3 b ) are also used for transporting the web material ( 14 ).
3. The method according to claim 1 , wherein a step of stretching the pre-tensioned web material ( 14 ) is carried out by the clamping jaws ( 3 a , 3 b ) and the tension roller arrangement ( 36 ).
4. A device for producing a packaging body ( 51 ) having an indentation ( 53 ) for receiving an item to be packaged from a web material ( 14 ) which comprises paper, comprising:
a device for feeding the web material in a transport direction;
a pre-tensioning device ( 3 );
a molding device ( 13 ) having a die ( 31 ), a holding-down device ( 32 ), a pneumatic device for generating a pneumatic molding force, and a removing device for removing the molded indentation from the die;
wherein the pre-tensioning device comprises clamping jaws ( 3 a , 3 b ) and a tension roller arrangement having at least two rollers ( 3 c , 3 d ); and
wherein the tension roller arrangement having at least two rollers is downstream of the molding device and the die in the transport direction.
5. The device according to claim 4 , wherein the molding device ( 13 ) also has a punch ( 33 ).
6. The device of claim 5 , wherein the punch ( 33 ) has an air duct ( 34 ).
7. The device according to claim 5 , also comprising a control unit ( 7 ) which is set up to bring the holding-down device ( 32 ) into a position in which web material ( 14 ) can be fed into the die ( 31 ) during a final molding step.
8. The device according to claim 4 , also comprising a control unit ( 7 ) which is set up to bring the holding-down device ( 32 ) into a position in which web material ( 14 ) can be fed into the die ( 31 ) during a final molding step.
9. A packaging machine comprising a device according to claim 4 .