Film pre-cutting device for packaging bag opening
By designing the film pre-cut device for packaging bag mouths, using the bite structure of the first cutter and the second cutter and the synchronous conveying assembly, the problem of low flow of bag cutting in the prior art is solved, and efficient bag edge-length cutting and pre-tearing hole formation is achieved.
Patent Information
- Application Number
- CN202422124930.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-08-30
AI Technical Summary
In the prior art, during the formation of the stamping pre-tear port of the packaging bag mouth, the stamping position is difficult to ensure, resulting in a low degree of flow and an efficient bag cutting cannot be achieved.
A film pre-cut device for the bag mouth of the packaging bag is designed, adopting a first cutter and a second cutter biting structure. A triangular cutter block is provided on the first cutter and a corresponding cutter groove is provided on the second cutter. The edge cutting and pre-tearing of the bag mouth are achieved through synchronous rotation, and the first conveying component and the second conveying component are matched to ensure stable transport of the packaging bag.
It realizes efficient cutting and pre-tearing of the packaging bag mouth, improves the flow-through production efficiency, avoids sliding or offsetting of the packaging bag during the transportation process, and ensures cutting quality.
Smart Images
Figure CN223132572U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of bag mouth treatment of packaging bags, in particular to a film pre-cutting device for the bag mouth of a packaging bag. Background Art
[0002] With the acceleration of people's life rhythm, there are more and more daily necessities such as packaged foods, and most of them use plastic packaging bags. In order to facilitate tearing, a pre-tearing opening is generally pre-cut on the side of the packaging bag. For example, pre-tearing openings are cut at both ends of packaging bags for foods, sugar cubes, etc. The existing cutting generally uses a stamping method to form a serrated pre-tearing opening at the bag mouth. Although the stamping method can quickly form a serrated pre-tearing opening at the bag mouth, the packaging bag is in a static state during stamping, that is, the conveying component for conveying the packaging bag is in a stopped state during the stamping process. Otherwise, when stamping on a moving packaging bag, the stamping position cannot be effectively guaranteed, which results in a relatively low degree of water flow in the stamping process. Content of the Utility Model
[0003] The technical problem to be solved by the utility model lies in the above-mentioned defects of the prior art, and provides a film pre-cutting device for the bag mouth of a packaging bag.
[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is as follows:
[0005] Construct a film pre-cutting device for the bag mouth of a packaging bag, including a frame. A first conveying component and a second conveying component are sequentially arranged on the frame. A film pre-cutting component is arranged on the inner side wall of the frame on one side of the second conveying component, and the second conveying component and the film pre-cutting component are arranged in parallel; wherein, the film pre-cutting component includes a first cutting knife and a second cutting knife. The first cutting knife and the second cutting knife rotate and engage with each other. A number of protruding triangular knife blocks are arranged on the first cutting knife, and knife grooves for accommodating the triangular knife blocks are arranged on the second cutting knife, and the triangular knife blocks and the knife grooves correspond to each other one by one; during use, the bag mouth of the packaging bag to be cut enters between the first cutting knife and the second cutting knife for cutting.
[0006] Preferably, both the first cutting knife and the second cutting knife include a first cylinder and a second cylinder, wherein the first cylinder and the second cylinder are coaxially and fixedly connected, and the diameter of the first cylinder is smaller than the diameter of the second cylinder; during use, the first cutting knife is located directly above the second cutting knife, the first cylinder of the first cutting knife is tangent to the second cylinder of the second cutting knife, the second cylinder of the first cutting knife is tangent to the first cylinder of the second cutting knife, and the second cylinder of the first cutting knife and the second cylinder of the second cutting knife engage to form a cutting edge cutting part. When the triangular knife block and the knife groove rotate to the engaging position, the triangular knife block and the knife groove form a triangular pre-tearing opening at the bag mouth.
[0007] Preferably, a rotating shaft is fixedly connected to the end of the second cylinder in the first cutter away from the first cylinder, and a rotating shaft is fixedly connected to the end of the first cylinder in the second cutter away from the second cylinder. Both the first cutter and the second cutter are arranged on the frame on one side of the second conveying component through the rotating shafts, and are close to the starting end of the second conveying component to ensure that the packaging bag to be cut is cut as soon as it leaves the first conveying component and enters the second conveying component.
[0008] Preferably, a gear is respectively connected to the end of the rotating shafts of the first cutter and the second cutter, and the two gears are meshed. A pulley is fixedly connected to the outer end of the gear of the first cutter, and the pulley is connected to the driving wheel at the end of the output shaft of the first driving motor arranged outside the frame through a belt, so that the rotating directions of the first cutter and the second cutter are opposite.
[0009] Preferably, the first conveying component includes a pressing part and a supporting part. The pressing part is located above the supporting part, and the pressing part is arranged on one side above the supporting part along the conveying direction of the supporting part. Among them, the supporting part is used for carrying and conveying the packaging bag to be cut, and the pressing part cooperates with the supporting part to keep the packaging bag to be cut relatively fixed on the supporting part and move along with the supporting part to avoid the packaging bag to be cut from sliding on the supporting part.
[0010] Preferably, both the pressing part and the supporting part include a driving roller, a driven roller and a belt sleeved on the driven roller and the driving roller. One end of the driving roller of the pressing part and one end of the driven roller are rotatably arranged on the bracket, and the other end is a free end. Both ends of the driving roller of the supporting part and both ends of the driven roller are rotatably arranged on the frame below the pressing part, and a synchronous gear is arranged at one end of the driving roller of the pressing part and one end of the driving roller, and the two synchronous gears are meshed with each other so that the belts in the pressing part and the supporting part rotate in opposite directions.
[0011] Preferably, the lengths of the driving roller and the driven roller of the pressing part match the length of the outer part of the packaging line of the packaging bag to be cut; the driving roller of the supporting part is driven by a second driving motor arranged outside the bracket.
[0012] Preferably, the second conveying component is composed of a driven roller, a driving roller arranged on the frame and a belt sleeved on the driven roller and the driving roller. The sum of the lengths of the belt in the second conveying component and the cutting knife in the cutting component is equal to the width of the belt in the supporting part.
[0013] Preferably, the driving roller in the second conveying component is driven by a third motor arranged outside the frame; and the rotating speeds of the belt in the first conveying component, the rotating speed in the second conveying component and the speed of the cutting knife in the pre-cutting component are the same.
[0014] The beneficial effects of the present utility model are as follows:
[0015] 1. The first conveying component of the present utility model is composed of a pressing part and a supporting part. The two jointly ensure that the packaging bag to be cut enters the second conveying component and the film pre-cutting component in a preset cutting state for cutting, avoiding the rotation and side shift of the packaging bag to be cut on the conveying component during the conveying process, and further preventing the bag mouth of the packaging bag to be cut from entering the film pre-cutting component for cutting.
[0016] 2. The film pre-cutting component of the present utility model includes two mutually meshing cutting knives. While the cutting knives rotate, they can perform edge trimming cutting on the bag mouth and also perform pre-tearing cutting; moreover, during the rotation of the cutting knives, they can also play a role in clamping and conveying the packaging bag, ensuring that the packaging bag to be cut can be placed relatively fixed on the second conveying component, avoiding relative sliding between the packaging bag to be cut and the second conveying component. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will further illustrate the present utility model in conjunction with the drawings and embodiments. The drawings in the following description are only partial embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings:
[0018] Figure 1 is a perspective view of the present utility model.
[0019] Figure 2 is a three-dimensional Figure 1 .
[0020] Figure 3 is a three-dimensional Figure 2 .
[0021] Figure 4 is a sectional view of the present utility model.
[0022] Figure 5 is a three-dimensional of the two cutting knives of the present utility model Figure 1 .
[0023] Figure 6 is a three-dimensional of the two cutting knives in the present utility model Figure 2 . DETAILED DESCRIPTION OF THE EMBODIMENTS
[0024] In order to make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model. Obviously, the described embodiments are partial embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present utility model.
[0025] For ease of understanding, the following definitions are made. As Figure 1 shown, the left side of the first conveying assembly 20 is the starting end, and the packaging bag to be cut is conveyed from left to right on the two conveying members of the device.
[0026] As Figures 1-6 shown, the present utility model provides a film pre-cutting device for the bag mouth of a packaging bag, and its specific implementation is as follows:
[0027] It includes a frame 10. The bottom of the frame 10 has support legs 101. The upper ends of the support legs 101 are fixedly connected with two side plates 102. The side plates 102 are used to install and fix the first conveying assembly 20, the second conveying assembly 30, and the film pre-cutting assembly 40. Between the two side plates 102 of the frame 10, the first conveying assembly 20 and the second conveying assembly 30 are arranged in sequence along the length direction of the frame 10. Inside one side plate 102 of the frame 10 on one side of the second conveying assembly 30, the film pre-cutting assembly 40 is provided. The second conveying assembly 30 and the film pre-cutting assembly 40 are arranged side by side, and the film pre-cutting assembly 40 is arranged near the starting end of the second conveying assembly 30, so that the film pre-cutting assembly 40 is as close as possible to the end of the first conveying assembly 30. In this way, the packaging bag to be cut conveyed by the first conveying assembly 20 can enter the film pre-cutting assembly 40 for cutting at the fastest speed.
[0028] In this embodiment, the film pre-cutting assembly 40 includes a first cutter 401 and a second cutter 402. The first cutter 401 and the second cutter 402 rotate and engage with each other. In this way, the two cutters can rotate for cutting, and at the same time, the rotation of the two cutters can also play an auxiliary conveying function, that is, the rotation and clamping of the two cutters make the bag mouth of the packaging bag also receive a forward moving driving force. At the same time, in order to form a triangular pre-ripping opening at the bag mouth of the packaging bag to be cut, a number of protruding triangular cutter blocks 401c are provided on the first cutter 401, and cutter grooves 402c for accommodating the triangular cutter blocks are provided on the second cutter 402. The triangular cutter blocks 401c and the cutter grooves 402c correspond to each other one by one. When in use, the bag mouth of the packaging bag to be cut enters between the first cutter 401 and the second cutter 402 for cutting.
[0029] Specifically, as shown in the figure, both the first cutting knife 401 and the second cutting knife 402 include a first cylinder 401a, 402a and a second cylinder 401b, 402b. The first cylinders 401a, 402a and the second cylinders 401b, 402b are coaxially and fixedly connected. The diameters of the first cylinders 401b, 402b are smaller than those of the second cylinders 401b, 402b. That is, when such two cylinders are connected together, a boss is formed. During use, the specific assembly or connection method of the first cutting knife 401 and the second cutting knife 402 is as follows: The first cutting knife 401 is located directly above the second cutting knife 402. The first cylinder 401a of the first cutting knife 401 is tangent to the second cylinder 402b of the second cutting knife 402, and the second cylinder 401b of the first cutting knife 401 is tangent to the first cylinder 402a of the second cutting knife 402. In this way, the second cylinder 401b of the first cutting knife 401 and the second cylinder 402b of the second cutting knife 402 are engaged to form a cutting part of the cutting edge.
[0030] It should be noted that the triangular knife block 401c in the first cutting knife 401 is arranged on the boss, and one side wall of the triangular knife block 401c is in close contact with the surface of the boss, and the other side surface is in close contact with the side wall of the first cylinder 401a. In this way, the edge of the boss between adjacent triangular knife blocks 401c and the two side edges of the triangular knife block 401c away from the boss form a continuous cutting edge. Moreover, when the triangular knife block 401c and the knife groove 402c are rotated to the engaged position, a triangular pre-tearing opening is formed at the bag mouth between the triangular knife block 401c and the knife groove 402c. The distance between adjacent pre-tearing openings is the arc length between two triangular knife blocks 401c on the first cutting knife 401. In this way, uniform pre-tearing openings are formed at the bag mouth during the rotation of the two cutting knives.
[0031] In order to rotatably arrange the two cutting knives on the side plate 102, a rotating shaft 401d is fixedly connected to the end of the second cylinder 401b in the first cutting knife 401 away from the first cylinder 401a, and a rotating shaft 402d is fixedly connected to the section of the first cylinder 402a in the second cutting knife 402 away from the second cylinder 402b. Both the first cutting knife 401 and the second cutting knife 402 are arranged on the frame 10 on one side of the second conveying assembly 30 through the rotating shafts 401d, 402d and are close to the starting end of the second conveying assembly 30.
[0032] To ensure that the two cutting knives can rotate synchronously in opposite directions, gears 401e and 402e are respectively connected to the ends of the rotating shafts 401d and 402d of the first cutting knife 401 and the second cutting knife 402. The two gears mesh with each other. A pulley 401f is fixedly connected to the outer end of the gear 401e of the first cutting knife 401. The pulley 401f is connected to the driving wheel at the end of the output shaft of the first driving motor 1 arranged outside the frame 10 through a belt, so that the first cutting knife 401 and the second cutting knife 402 rotate in opposite directions. In this way, during the rotation of the two cutting knives, the cutting of the bag mouth is realized, and at the same time, the packaging bag is clamped and conveyed.
[0033] As the transmission component in the present utility model, it is mainly used to support and convey the packaging bag. Specifically, the first conveying assembly 20 includes a pressing part 201 and a supporting part 202. The pressing part 201 is located above the supporting part 202, and the pressing part 201 is arranged on one side above the supporting part 202 along the conveying direction of the supporting part 202. Among them, the supporting part 202 is used to carry and convey the packaging bag to be cut, and the pressing part 201 cooperates with the supporting part 202 to keep the packaging bag to be cut relatively fixed on the supporting part 202, so as to avoid the packaging bag to be cut from sliding on the supporting part 202. In this way, the packaging bag to be cut can be conveyed in a relatively stable state, and it can be ensured that the bag mouth of the packaging bag to be cut can smoothly enter between the two cutting knives for cutting.
[0034] The specific structures of the pressing part 201 and the supporting part 20 in the above embodiments are as follows: both of them include driving rollers 201a, 202a, driven rollers 201b, 202b and belts sleeved on the driven rollers and the driving rollers. One end of the driving roller 201a and the driven roller 201b of the pressing part 201 is rotatably arranged on the frame 10, and the other end is a free end; both ends of the driving roller 202a and the driven roller 202b of the supporting part 202 are rotatably arranged on the frame 10 below the pressing part 201. While ensuring the rotation of the belts, the two side plates 102 at the top of the frame 10 are connected into a whole. In this way. And a synchronous gear is provided at one end of the driving roller 201a of the pressing part 201 and one end of the driving roller 202a of the supporting part 202. The two synchronous gears mesh with each other, so that the belts in the pressing part 201 and the supporting part 202 rotate in opposite directions.
[0035] It should be noted that the lengths of the driving roller 201a and the driven roller 201b in the pressing and feeding part 201 match the length of the outer part of the packaging bag sealing line to be cut, that is, the driving roller 201a and the driven roller 201b in the pressing and feeding part 201 are shorter, so that the pressing and feeding part 201 is only located above one side part of the supporting part 202, so that the pressing and feeding part 201 only cooperates with the supporting part 202 to clamp and convey the sealing end of the packaging bag; the driving roller 202a of the supporting part 202 is driven by a second driving motor 2 arranged outside the bracket 10.
[0036] In some embodiments, the second conveying assembly 30 is composed of a driven roller 301, a driving roller 301 arranged on the frame 10, and a belt sleeved on the driven roller 301 and the driving roller 301. The driven roller 301 and the driving roller 301 are rotatably arranged on the side plate 102 at the end of the first conveying assembly 20. The sum of the lengths of the belt in the second conveying assembly 30 and the cutter in the film pre-cutting assembly 40 is less than the width of the belt in the supporting part 202. The belt in the second conveying assembly 30 is sleeved on the driving roller 301 and the driven roller 302 of this assembly, and the belt is arranged close to one of the side plates 102 (this side plate is the side plate opposite to the side plate where the cutter is installed), so that a space for arranging the film pre-cutting assembly 40 is formed between the belt of the second conveying assembly 30 and one of the side plates 102.
[0037] Furthermore, the driving roller 301 in the second conveying assembly 30 is driven by a third driving motor 3 arranged outside the frame 10; and the rotating speed of the belt in the first conveying assembly 20, the rotating speed in the second conveying assembly 30, and the speed of the cutter in the film pre-cutting assembly 40 are all the same.
[0038] In addition, a top plate 4 is also arranged on the side plate 102 between the pressing and feeding part 201 and the supporting part 202. The top plate 4 prevents the sealing end of the packaging bag to be cut from entering the pressing and feeding part 201 and the supporting part 202 too much, thereby preventing the pressing and feeding part 201 and the supporting part 202 from clamping the main body part of the packaging bag too much and causing damage to the items inside the packaging bag.
[0039] The usage method or principle of the present utility model is as follows:
[0040] Start the first drive motor 1, the second drive motor 2 and the third drive motor 3; place the packaging bag to be cut into the first conveying assembly 20, and the packaging bag to be cut is clamped and conveyed forward by the synchronous reverse rotation of the belts in the supporting portion 202 and the pressing portion 201; after the packaging bag to be cut enters the second conveying assembly 30 from the first conveying assembly 20, the bag mouth of the packaging bag to be cut immediately enters between the first cutting knife 401 and the second cutting knife 402, and the rotating first cutting knife 401 and the second cutting knife 402 cut at the bag mouth of the packaging bag to be cut. While cutting, the two cutting knives cooperate with the second conveying assembly 30 to convey the packaging bag forward, and the cut packaging bag enters a predetermined position, such as a collection box, etc. under the conveyance of the second conveying assembly 30.
[0041] It should be understood that the present utility model is described through some embodiments. As is known to those skilled in the art, without departing from the spirit and scope of the present utility model, various changes or equivalent replacements can be made to these features and embodiments. Additionally, under the teaching of the present utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present utility model.
Claims
1. A film pre-cutting device for the bag mouth of a packaging bag, comprising a frame, characterized in that, A first conveying component and a second conveying component are successively arranged on the frame. A film pre-cutting component is arranged on the inner side wall of the frame on one side of the second conveying component. The second conveying component and the film pre-cutting component are arranged side by side. Among them, the film pre-cutting component includes a first cutting knife and a second cutting knife. The first cutting knife and the second cutting knife are rotationally engaged. A number of protruding triangular knife blocks are arranged on the first cutting knife, and knife grooves for accommodating the triangular knife blocks are arranged on the second cutting knife. The triangular knife blocks and the knife grooves correspond to each other one by one. During use, the bag mouth of the packaging bag to be cut enters between the first cutting knife and the second cutting knife for cutting.
2. The film pre-cutting device for the bag mouth of a packaging bag according to claim 1, characterized in that, Both the first cutting knife and the second cutting knife include a first cylinder and a second cylinder. Among them, the first cylinder and the second cylinder are coaxially fixedly connected, and the diameter of the first cylinder is smaller than that of the second cylinder. During use, the first cutting knife is located directly above the second cutting knife. The first cylinder of the first cutting knife is tangent to the second cylinder of the second cutting knife, the second cylinder of the first cutting knife is tangent to the first cylinder of the second cutting knife, and the second cylinder of the first cutting knife and the second cylinder of the second cutting knife are engaged to form a cutting edge cutting part. When the triangular knife block and the knife groove rotate to the engaged position, the triangular knife block and the knife groove form a triangular pre-tearing opening at the bag mouth.
3. A film pre-cutting device for the bag mouth of a packaging bag according to claim 2, characterized in that, A rotating shaft is fixedly connected to the end of the second cylinder of the first cutting knife away from the first cylinder. A rotating shaft is fixedly connected to the end of the first cylinder of the second cutting knife away from the second cylinder. Both the first cutting knife and the second cutting knife are arranged on the frame on one side of the second conveying component through the rotating shafts.
4. The film pre-cutting device for the bag mouth of a packaging bag according to claim 3, characterized in that, A gear is respectively connected to the end of the rotating shaft of the first cutting knife and the second cutting knife. The two gears are engaged. A pulley is fixedly connected to the outer end of the gear of the first cutting knife. The pulley is connected to the driving wheel at the end of the output shaft of the first driving motor arranged outside the frame through a belt, so that the first cutting knife and the second cutting knife rotate in opposite directions.
5. The film pre-cutting device for the bag mouth of a packaging bag according to claim 4, wherein, The first conveying component includes a pressing part and a supporting part. The pressing part is located above the supporting part, and the pressing part is arranged on one side above the supporting part along the conveying direction of the supporting part. Among them, the supporting part is used for carrying and conveying the packaging bag to be cut. The pressing part cooperates with the supporting part to keep the packaging bag to be cut relatively fixed above the supporting part and move along with the supporting part to prevent the packaging bag to be cut from sliding on the supporting part.
6. The film pre-cutting device for the bag mouth of a packaging bag according to claim 5, wherein Both the pressing part and the supporting part include a driving roller, a driven roller, and a belt sleeved on the driven roller and the driving roller. One end of the driving roller of the pressing part and one end of the driven roller are rotatably arranged on the bracket, and the other end is a free end. Both ends of the driving roller of the supporting part and both ends of the driven roller are rotatably arranged on the frame below the pressing part. And a synchronous gear is arranged at one end of the driving roller of the pressing part and one end of the driving roller. The two synchronous gears are engaged with each other, so that the belts in the pressing part and the supporting part rotate in opposite directions.
7. The film pre-cutting device for the bag mouth of a packaging bag according to claim 6, wherein, The lengths of the driving roller and the driven roller of the pressing part match the length of the outer part of the packaging line of the packaging bag to be cut. The driving roller of the supporting part is driven by a second driving motor arranged outside the bracket.
8. The film pre-cutting device for the bag opening of a packaging bag according to claim 7, characterized in that, The second conveying component is composed of a driven roller, a driving roller arranged on the rack, and a belt sleeved on the driven roller and the driving roller. The sum of the lengths of the belts in the second conveying component and the cutting knives in the cutting component is equal to the width of the belt in the supporting part.
9. A film pre-cutting device for the bag mouth of a packaging bag according to claim 8, characterized in that, The driving roller in the second conveying component is driven by a third motor arranged outside the rack; and the rotating speeds of the belts in the first conveying component, the rotating speed in the second conveying component, and the cutting speed of the cutting knives in the pre-cutting component are all the same.