Switchable cutting mechanism

Abstract

The utility model 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 utility model relates to packaging equipment, in particular to a switchable cutting mechanism. Background Art

[0002] After continuous packaging bags are filled and heat-sealed, they often need to be cut into single strips or multiple strips for subsequent distribution and use. When cutting into multiple strips, it's often necessary to partially cut each adjacent package. For ease of use, users can tear the package along the cuts to separate it into individual strips. For example, this involves cutting multiple small food or shampoo bags. In order 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 will be activated. Then the packaging bags pass through the second knife group. If full cutting is required, the second knife group will be 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 parts being partially broken, affecting the molding quality. Utility Model Content

[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 problems.

[0004] To this end, the present invention is implemented by adopting the following scheme:

[0005] A switchable cutting mechanism, characterized in that: it includes a first driving shaft and a second driving shaft, a first knife seat is provided on the first driving shaft, a knife anvil is installed on the first knife seat, a second knife seat is provided on the second driving shaft, a cutting knife cooperating with the knife anvil is installed on the second knife seat, the knife anvil is provided with cut-free grooves, the knife anvil and / or the cutting knife can be moved along the axial direction of the driving shaft so that the cut-free groove on the knife anvil is aligned with or staggered with the blade of the cutting knife, a first flange is provided on the first driving shaft, the knife anvil is installed on the first flange by a first positioning bolt, a second flange is provided on the second driving shaft, and the cutting knife is installed on the second flange by a second positioning bolt.

[0006] It also includes a first motor, the output end of the first motor is connected to the first gear, the first gear is connected to the first drive shaft, the first gear is meshed with the second gear, and the second gear is connected to the second drive shaft.

[0007] It also includes a second motor, the output end of the second motor is connected to the rotating wheel, the rotating wheel is provided with an eccentric column, the eccentric column is clamped in the slot on the swing frame, one end of the swing frame is hinged to the frame, the swing frame is provided with a transmission seat, the transmission seat is provided with a transmission member that can be abutted against the front or rear side of the transmission disk, the transmission disk is connected to the second drive shaft, and the second drive shaft can be axially slidably arranged in the mounting seat.

[0008] The transmission member is a roller, and the eccentric column is provided with a bearing that matches the slot.

[0009] A switchable cutting mechanism of the above technical solution only needs to be provided with two matching drive shafts, and matching anvils and cutting knives are provided on the drive shafts. It is only necessary to control the movement of the anvil and / or the cutting knife so that the cut-free groove on the anvil is aligned with the blade of the cutting knife to partially cut the product, or to stagger the cut-free groove on the anvil with the blade of the cutting knife to fully cut the product. In this way, a set of cutting knife structures can realize the function switching of cutting and partial cutting, effectively reducing the space required and facilitating its layout on the equipment; in addition, there is no need to pull the product between the two cutting knife components, which can effectively avoid the situation where some cutting parts are partially broken due to excessive force, further improving the stability and reliability of the cutting quality. Through the installed flange, the cutting knife and the anvil can be quickly positioned to avoid the trouble of adjustment during the cutting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The utility model has the following drawings:

[0011] Figure 1 It is a structural diagram of the utility model;

[0012] Figure 2 for Figure 1 A partial enlarged view of the area pointed by A in the middle;

[0013] Figure 3 for Figure 2 A view showing the center free cut groove and the cutting blade being offset;

[0014] Figure 4 for Figure 1 A view from another perspective;

[0015] Figure 5 for Figure 4 A partial enlarged view of the point where B is pointing;

[0016] Figure 6 for Figure 4 A view from another perspective. DETAILED DESCRIPTION

[0017] As shown in the figure, the present invention discloses a switchable cutting mechanism, comprising a first drive shaft 6 and a second drive shaft 5, and more specifically, a first motor 13. The output end of the first motor 13 is connected to a first gear 11 via a synchronous belt drive assembly 12. The first gear 11 is connected to the first drive shaft 6, and the first gear 11 is meshed with a second gear 18. The second gear 18 is connected to the second drive shaft 5. By controlling the first motor 13 to start and through the first and second gear transmissions, the first and second drive shafts can be driven to rotate. The first drive shaft 6 is provided with a first knife seat 8, on which an anvil 7 is mounted. The second drive shaft 5 is provided with a second knife seat 4, on which a cutting knife 3 is mounted to cooperate with the anvil 7. The anvil 7 is provided with a non-cutting groove 17. 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 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. The rotating wheel 22 is provided with an eccentric column 24, which is inserted into a slot 25 on the swing frame 15. The eccentric column 24 is provided with a bearing 23 that cooperates with the slot 25. One end of the swing frame 15 is hinged to the frame. The swing frame 15 is provided with a transmission seat 21. The transmission seat 21 is provided with a transmission member 20 that can abut against the front or rear side of a transmission disk 19. The transmission member 20 is a roller. The transmission disk 19 is connected to the second drive shaft 5, which is axially slidably disposed in a mounting seat 26. By controlling the start of the second motor 14, the rotating wheel 22 is driven to rotate, causing the eccentric column 24 to drive the swing frame 15 to swing. Then, the transmission member 20 squeezes the transmission disk 19, thereby driving the second drive shaft 5 to move along its axial direction, thereby adjusting the position of the cutting blade 3 so that the cutting blade 16 on the cutting blade 3 is aligned or staggered with the non-cutting groove 17 on the anvil 7. Of course, in addition to the above structure, a common linear drive mechanism such as a cylinder or screw can also be used in conjunction with a coupling to drive the second drive shaft to move, or a cam can be used to compress 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 form a spring to achieve the movement and control of the second drive shaft. In addition, in this embodiment, a single second drive shaft 5 is driven to move axially to achieve 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 simultaneously, or by directly driving one or both of the knife holders to move, which can also achieve relative movement between the two cutting knives. The first drive shaft 6 is provided with a first flange 10, and the anvil 7 is mounted on the first flange 10 via a first positioning bolt 9. The second drive shaft 5 is provided with a second flange 1, and the cutting knife 3 is mounted on the second flange via a second positioning bolt 2. The first and second positioning bolts can be provided to quickly locate the installation positions of the anvil and cutting knife.The first and second flanges in this embodiment have an upper and lower half structure. When the upper flange and the lower flange are buckled together, the first drive shaft or the second drive shaft can be buckled together to facilitate the installation of the equipment.

[0018] The working principle of the utility model is as follows: when it is necessary to partially cut a 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.

[0019] The structure of the present invention only requires two matching drive shafts, and matching anvils and cutting knives are set on the drive shafts. It is only necessary to control the movement of the anvil and / or cutting knife so that the cut-free groove on the anvil is aligned with the cutting knife's blade to partially cut the product, or to stagger the cut-free groove on the anvil with the cutting knife's blade to fully cut the product. In this way, a set of cutting knife structures can realize the switching between cutting and partial cutting functions, effectively reducing the space required and facilitating its layout on the equipment. In addition, there is no need to pull the product between the two cutting knife components, which can effectively avoid the situation where some cutting parts are partially broken due to excessive force, further improving 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 provided on the first drive shaft (6), an anvil (7) is mounted on the first knife seat (8), a second knife seat (4) is provided on the second drive shaft (5), a cutting knife (3) cooperating with the anvil (7) is mounted on the second knife seat (4), the anvil (7) is provided with cut-free grooves (17), the anvil (7) and / or the cutting knife (3) can be moved along the axial direction of the drive shaft so that the cut-free grooves (17) on the anvil (7) and the blade (16) of the cutting knife (3) are aligned or staggered with each other, a first flange (10) is provided on the first drive shaft (6), the anvil (7) is mounted on the first flange via a first positioning bolt, and a second flange (1) is provided on the second drive shaft (5), and the cutting knife (3) is mounted on the second flange (1) via a second positioning bolt (2).

2. A switchable cutting mechanism according to claim 1, characterized in that The first motor (13) is also included. The output end of the first motor (13) is in transmission connection with the first gear (11). 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).

3. A switchable cutting mechanism according to claim 1, characterized in that The invention also includes a second motor (14), wherein the output end of the second motor (14) is connected to the rotating wheel (22), the rotating wheel (22) is provided with an eccentric column (24), the eccentric column (24) is clamped into the clamping groove (25) on the swing frame (15), one end of the swing frame (15) is hinged to the frame, the swing frame (15) is provided with a transmission seat (21), the transmission seat (21) is provided with a transmission member (20) that can abut against the front side or the rear side of the transmission disk (19), 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).

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

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