Packaging machine equipped with independent cutting and welding bars
A machine ( 30 ) is described for packaging products in a plastic film, comprising at least one longitudinal cutting and welding bar ( 31 ) actuated in its up-and-down movement by at least one first piston ( 34 ), supported by a first supporting structure ( 37 ) of such packaging machine ( 30 ); at least one transverse cutting and welding bar ( 33 ) independent from the longitudinal cutting and welding bar ( 31 ) and actuated in its up-and-down movement by at least one second piston ( 35 ) supported by a second supporting structure ( 39 ) of such packaging machine ( 30 ); and controlling and managing means adapted to control and program the operation of at least the first and the second piston ( 34, 35 ).
1. A packaging machine for packaging products in a plastic film, the packaging machine comprising:
at least one longitudinal cutting and welding bar actuated in an up-and-down movement by at least one first piston, supported by a first supporting structure of the packaging machine;
at least one transverse cutting and welding bar, the transverse cutting and welding bar being independent from the longitudinal cutting and welding bar and actuated in an up-and-down movement by at least one second piston supported by a second supporting structure of the packaging machine; and
controlling and managing means adapted to control and program an operation of at least the first piston and the second piston;
where the controlling and managing means are adapted to keep the transverse cutting and welding bar unmoving and to actuate only the longitudinal cutting and welding bar; and
where the transverse cutting and welding bar comprises a first cutting and welding portion having a “V”-shaped section and a second welding portion adapted to realize a small welded plate, the small welded plate not having cuts, on the plastic film next to an angle on the film between a transverse cut T t and a longitudinal cut T 1 performed by the cutting and welding bars around a product to be packaged.
2. The packaging machine according to claim 1 , where the second supporting structure is actuated in an up-and-down movement by sliding guides and by at least one pneumatic piston arranged in a carrier riser, along which the second supporting structure is moved, adjusted, or moved and adjusted in height.
3. The packaging machine according to claim 1 , further comprising a first lower abutment bar of the transverse cutting and welding bar, the first lower abutment bar being actuated in an up-and-down movement coordinated with the movement of the transverse cutting and welding bar by at least one third piston.
4. The packaging machine according to claim 3 , where the third piston is pneumatically operated.
5. The packaging machine according to claim 3 , further comprising two third pistons.
6. The packaging machine according to claim 3 , where the controlling and managing means are adapted to control and program an operation of the third piston.
7. The packaging machine according to claim 1 , further comprising a second lower abutment bar of the longitudinal cutting and welding bar, the second lower abutment bar being actuated in an up-and-down movement coordinated with the movement of the longitudinal cutting and welding bar by at least one fourth piston.
8. The packaging machine according to claim 7 , where the fourth piston is pneumatically operated.
9. The packaging machine according to claim 7 , further comprising two fourth pistons.
10. The packaging machine according to claim 7 , where the controlling and managing means are adapted to control and program an operation of the fourth piston.
11. The packaging machine according to claim 1 , where the first piston is pneumatically operated.
12. The packaging machine according to claim 1 , where the second piston is pneumatically operated.
13. The packaging machine according to claim 1 , further comprising two first pistons.
14. The packaging machine according to claim 1 , further comprising two second pistons.