Switchable cutting mechanism

Abstract

The invention discloses a switchable cutting mechanism which is characterized in that the switchable cutting mechanism comprises a first driving shaft and a second driving shaft, the first driving shaft is provided with a first cutter holder, the first cutter holder is provided with a cutter anvil, the second driving shaft is provided with a second cutter holder, the second cutter holder is provided with a cutter matched with the cutter anvil, and the cutter anvil is provided with a cutter matched with the cutter anvil. Cutting-free grooves are formed in the cutter anvil in an arrayed mode, and the cutter anvil and / or the cutting knife can move in the axial direction of the driving shaft, so that the cutting-free grooves in the cutter anvil and the cutting edge of the cutting knife are aligned or staggered. The cutting device is simple in structure and reasonable in design, switching of full cutting or partial cutting can be achieved according to requirements, and the use requirements of users are met.

Description

Technical Field

[0001] The invention relates to packaging equipment, in particular to a switchable cutting mechanism. Background Art

[0002] After the continuous forming packaging bag is filled and heat-sealed, the product usually needs to be cut into single strips or multiple strips for subsequent sales and use. When cutting into multiple strips, it is usually necessary to partially cut each adjacent package of products, so that the user can tear it into a single strip along the partial cut for convenient use, such as multiple small bags of food, shampoo and other products. In order to be able to partially cut the packaging bags and completely cut them into a single group state after the required number of packaging bags have passed, a first knife group capable of partial cutting and a second knife group capable of full cutting are usually provided at the cutting mechanism. The packaging bags first pass through the first knife group. If partial cutting is required, the first knife group is activated. Then the packaging bags pass through the second knife group. If full cutting is required, the second knife group is activated. The defects of this structure are: two knife groups need to be provided, resulting in a relatively complex structure and a large occupied area. In addition, after the packaging bags are partially cut, they need to be pulled to the second knife group. During this pulling process, the packaging bags are also easily subjected to force, resulting in the partially cut part being partially pulled apart, affecting the molding quality. Summary of the invention

[0003] In view of the shortcomings of the background technology, the technical problem to be solved by the present invention is to provide a switchable cutting mechanism for solving the above-mentioned problem.

[0004] To this end, the present invention is implemented by adopting the following scheme: A switchable cutting mechanism, characterized in that it comprises a first driving shaft and a second driving shaft, wherein a first knife seat is arranged on the first driving shaft, an anvil is mounted on the first knife seat, a second knife seat is arranged on the second driving shaft, a cutting knife cooperating with the anvil is mounted on the second knife seat, and the anvil is provided with cutting-free grooves, and the anvil and / or the cutting knife can be moved along the axial direction of the driving shaft so that the cutting-free groove on the anvil is aligned with or staggered with the blade of the cutting knife.

[0005] It also includes a first motor, the output end of the first motor is transmission-connected to a first gear, the first gear is connected to a first drive shaft, the first gear is meshed with a second gear, and the second gear is connected to a second drive shaft.

[0006] It further includes a second motor. The output end of the second motor is connected to a rotating wheel. An eccentric column is provided on the rotating wheel. The eccentric column is snapped into a card slot on a swing frame. One end of the swing frame is hinged to a machine frame. A transmission seat is provided on the swing frame. A transmission member that can abut against the front side or the rear side of a transmission disc is provided on the transmission seat. The transmission disc is connected to a second drive shaft. The second drive shaft is slidably arranged axially in a mounting seat.

[0007] The transmission member is a roller. A bearing cooperating with the card slot is provided on the eccentric column.

[0008] A first connection sleeve is provided on the first drive shaft. A first positioning bolt is screwed on the first connection sleeve. One end of the anvil abuts against the first positioning bolt. A second connection sleeve is provided on the second drive shaft. A second positioning bolt is screwed on the second connection sleeve. One end of the cutting knife abuts against the second positioning bolt.

[0009] For a switchable cutting mechanism of the above technical solution, only two cooperating drive shafts need to be provided, and cooperating anvils and cutting knives are provided on the drive shafts. Only by controlling the movement of the anvil and / or the cutting knife so that the non-cutting groove on the anvil is aligned with the cutting edge of the cutting knife can partial cutting of the product be performed, or by staggering the non-cutting groove on the anvil from the cutting edge of the cutting knife, full cutting can be performed to cut off the product. In this way, a set of cutting knife structures can realize the function switching between cutting off and partial cutting, effectively reducing the occupied space required by it and facilitating its layout on the equipment; in addition, it is no longer necessary to pull the product between two cutting knife assemblies, which can effectively avoid the situation that part of the cut part is partially broken due to excessive force, further improving the stability and reliability of the cutting quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The present invention has the following drawings: Figure 1 is a schematic structural diagram of the present invention; Figure 2 is Figure 1 a partial enlarged view at the position pointed by A in Figure 3 is Figure 2 a view when the non-cutting groove on the anvil is staggered from the cutting edge of the cutting knife in Figure 4 is Figure 1 a view from another perspective; Figure 5 is Figure 4 a partial enlarged view at the position pointed by B in Figure 6 is Figure 4 a view from another perspective. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0011] As shown in the figure, a switchable cutting mechanism disclosed by the present invention includes a first drive shaft 6 and a second drive shaft 5, and specifically, also includes a first motor 13. The output end of the first motor 13 is connected to the first gear 11 through a synchronous belt transmission group 12. The first gear 11 is connected to the first drive shaft 6. The first gear 11 is meshed with the second gear 18. The second gear 18 is connected to the second drive shaft 5. By controlling the first motor 13 to start and passing through the first and second gears, the first and second drive shafts can be driven to rotate. A first knife seat 8 is arranged on the first drive shaft 6, and a knife anvil 7 is installed on the first knife seat 8. A second knife seat 4 is arranged on the second drive shaft 5. A cutting knife 3 that cooperates with the knife anvil 7 is installed on the second knife seat 4. The knife anvil 7 is arranged with a non-cutting groove 17. The knife anvil 7 and / or the cutting knife 3 can move along the axial direction of the drive shaft, so that the non-cutting groove 17 on the knife anvil 7 is aligned with or staggered with the blade 16 of the cutting knife 3. The machine also includes a second motor 14, the output end of which is connected to a rotating wheel 22, an eccentric column 24 is provided on the rotating wheel 22, the eccentric column 24 is inserted into a slot 25 on the swing frame 15, and a bearing 23 is provided on the eccentric column 24 to match the slot 25. One end of the swing frame 15 is hinged on the frame, a transmission seat 21 is provided on the swing frame 15, and a transmission member 20 is provided on the transmission seat 21 that can abut against the front or rear side of the transmission disk 19, the transmission member 20 is a roller, the transmission disk 19 is connected to the second drive shaft 5, and the second drive shaft 5 can be axially slidably arranged in the mounting seat 26, by controlling the second motor 14 to start, the rotating wheel 22 is driven to rotate, so that the eccentric column 24 drives the swing frame 15 to swing, and then the transmission disk 19 is squeezed by the transmission member 20, thereby driving the second drive shaft 5 to move along its axial direction, and adjusting the position of the cutting knife 3, so that the blade 16 on the cutting knife 3 is aligned or staggered with the cutting-free groove 17 on the anvil 7. Of course, in addition to the above structure, a common linear drive mechanism such as a cylinder, a screw rod and the like can also be used to cooperate with a coupling to drive the second drive shaft to move, or a cam is used to squeeze one end of the coupling, the coupling is connected to the second drive shaft, and the other end of the second drive shaft is pressed by the coupling to provide a spring structure to achieve the movement adjustment control of the second drive shaft. In addition, in this embodiment, a single second drive shaft 5 is driven to move axially to achieve the relative movement between the anvil and the cutting knife. This can also be achieved by driving the first drive shaft 6 or driving the first and second drive shafts to move at the same time, or by directly driving one or both of the knife seats to move, which can also achieve the relative movement between the two cutting knives.A first connecting sleeve 10 is provided on the first driving shaft 6, and a first positioning bolt 9 is screwed on the first connecting sleeve 10, and one end of the anvil 7 is against the first positioning bolt 9. A second connecting sleeve 1 is provided on the second driving shaft 5, and a second positioning bolt 2 is screwed on the second connecting sleeve 1, and one end of the cutting knife 3 is against the second positioning bolt 2. By setting the first and second positioning bolts, the installation positions of the anvil and the cutting knife can be positioned.

[0012] The working principle of the present invention is: when it is necessary to partially cut the passing packaging bag, the second driving shaft 5 is controlled to move axially to a suitable position so that the non-cutting groove 17 on the anvil 7 is aligned with the blade 16 of the cutting knife 3. Due to the existence of the non-cutting groove 17, the blade of the cutting knife 3 at this position cannot cooperate with the anvil 7, so that the packaging bag will only be partially cut; when it is necessary to completely cut the passing packaging bag, the second driving shaft 5 is controlled to move axially to a suitable position so that the non-cutting groove 17 on the anvil 7 is staggered with the blade 16 of the cutting knife 3. At this time, the blades of the first and cutting knives can fully cooperate to completely cut the packaging bag.

[0013] This structure of the present invention only needs to set up two matching drive shafts, and set matching anvils and cutting knives on the drive shafts. It only needs to control the movement of the anvil and / or the cutting knife so that the non-cutting groove on the anvil is aligned with the blade of the cutting knife, and the product can be partially cut, or the non-cutting groove on the anvil is staggered with the blade of the cutting knife, and the product can be fully cut. In this way, a set of cutting knife structures can realize the function switching of cutting and partial cutting, effectively reducing the space required for it and facilitating its layout on the equipment; in addition, it is no longer necessary to pull the product between the two cutting knife components, which can effectively avoid the situation where some cutting parts are partially pulled off due to excessive force, and further improve the stability and reliability of the cutting quality.

Claims

1. A switchable cutting mechanism, characterized in that: The invention comprises a first drive shaft (6) and a second drive shaft (5), wherein a first knife seat (8) is arranged on the first drive shaft (6), an anvil (7) is mounted on the first knife seat (8), a second knife seat (4) is arranged on the second drive shaft (5), a cutting knife (3) matched with the anvil (7) is mounted on the second knife seat (4), and the anvil (7) is provided with a non-cutting groove (17) arranged thereon, and the anvil (7) and / or the cutting knife (3) can be moved along the axial direction of the drive shaft so that the non-cutting groove (17) on the anvil (7) is aligned with or staggered from the blade (16) of the cutting knife (3).

2. The switchable cutting mechanism according to claim 1, characterized in that The invention also comprises a first motor (13), wherein an output end of the first motor (13) is drivingly connected to a first gear (11), the first gear (11) is connected to a first drive shaft (6), the first gear (11) is meshed with a second gear (18), and the second gear (18) is connected to a second drive shaft (5).

3. The switchable cutting mechanism according to claim 1, characterized in that The machine also comprises a second motor (14), wherein an output end of the second motor (14) is connected to a rotating wheel (22), an eccentric column (24) is arranged on the rotating wheel (22), the eccentric column (24) is inserted into a slot (25) on a swing frame (15), one end of the swing frame (15) is hinged on a frame, a transmission seat (21) is arranged on the swing frame (15), a transmission member (20) which can abut against the front side or the rear side of a transmission disc (19) is arranged on the transmission seat (21), the transmission disc (19) is connected to a second drive shaft (5), and the second drive shaft (5) is axially slidably arranged in a mounting seat (26).

4. The switchable cutting mechanism according to claim 3, wherein The transmission member (20) is a roller, and the eccentric column (24) is provided with a bearing (23) that cooperates with the slot (25).

5. The switchable cutting mechanism according to claim 1, wherein The first drive shaft (6) is provided with a first connecting sleeve (10), a first positioning bolt (9) is screwed onto the first connecting sleeve (10), one end of the knife anvil (7) abuts against the first positioning bolt (9), the second drive shaft (5) is provided with a second connecting sleeve (1), a second positioning bolt (2) is screwed onto the second connecting sleeve (1), and one end of the cutting knife (3) abuts against the second positioning bolt (2).

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