A point breaking device and point breaking method for ziplock bag

Abstract

The present invention discloses a ziplock bag point breaking device and a ziplock bag point breaking method. The ziplock bag point breaking device includes a base and a first extrusion wheel and a second extrusion wheel rotatably mounted on the base. The rotation axis direction of the first extrusion wheel is consistent with the rotation axis direction of the second extrusion wheel. The circumferential surface of the first extrusion wheel and the circumferential surface of the second extrusion wheel are opposite and spaced apart. A plurality of extrusion teeth are spaced apart on the circumferential surface of the first extrusion wheel. The length direction of the extrusion teeth is consistent with the axial direction of the first extrusion wheel. The first extrusion wheel can be adjusted to be close to or away from the second extrusion wheel, or the second extrusion wheel can be adjusted to be close to or away from the first extrusion wheel. The ziplock bag point breaking device of the present application has a simple structure, low cost, and is easy to operate and maintain. The ziplock bag point breaking method of the present application has a better ziplock bag point breaking effect, a higher yield rate, and excellent opening and closing sound effect of the ziplock bag.

Description

Technical Field

[0001] The invention relates to the technical field of ziplock bag production, in particular to a ziplock bag point breaking device and a ziplock bag point breaking method. Background Art

[0002] Ziplock bags are mainly used for storing small items. Ziplock bags produced with food-grade raw materials can also be used to store various small foods, tea, seafood, etc. They can prevent moisture, insects and prevent things from scattering, and are widely used in people's daily lives.

[0003] Since the sealing clip chain with a smooth structure does not make any sound during the closing and opening process, the user will not be able to judge whether the sealing clip chain is closed in place based on the sound, and when continuously pressing to close the sealing clip chain, the user's fingers will experience a burning sensation, causing inconvenience in use.

[0004] Although there are some technologies on the market that can make the sealing clip chain produce auditory feedback, the equipment used by these technologies is generally expensive, and when processing the sealing strips, the production method of the ziplock bag is driven by the rotation of the extrusion wheel. In this way, if the ziplock bag is not fed in time or the ziplock bag is stuck in feeding, the extrusion wheel will damage the ziplock bag, reduce the yield rate of the ziplock bag, and even damage the extrusion wheel in severe cases.

[0005] Therefore, in view of the above-mentioned existing technical problems, it is necessary to propose a new technical solution. Summary of the invention

[0006] In order to solve the above-mentioned technical problems, the present application provides a point breaking device with simple structure, low cost, convenient operation and maintenance. Through the point breaking device, combined with the traction equipment, the sealing clip chain can be squeezed by the self-sealing bag driving the extrusion wheel to rotate, so as to obtain a self-sealing bag with better point breaking effect, higher yield rate and excellent opening and closing sound effect. The specific scheme is as follows:

[0007] To achieve the purpose of the invention, according to one aspect of the invention, the invention provides a ziplock bag breaking device, which includes a base and a first extrusion wheel and a second extrusion wheel rotatably mounted on the base, the rotation axis direction of the first extrusion wheel is consistent with the rotation axis direction of the second extrusion wheel, the circumferential surface of the first extrusion wheel and the circumferential surface of the second extrusion wheel are opposite to each other and are arranged at intervals, a plurality of extrusion teeth are arranged at intervals on the circumferential surface of the first extrusion wheel, the length direction of the extrusion teeth is consistent with the axial direction of the first extrusion wheel, the first extrusion wheel can be adjusted to be close to or away from the second extrusion wheel, or the second extrusion wheel can be adjusted to be close to or away from the first extrusion wheel.

[0008] Furthermore, the base is U-shaped, and has a first branch and a second branch that are arranged in parallel and spaced apart.

[0009] Furthermore, it also includes a fixed plate, a rotating seat and a rotating frame, the fixed plate is vertically fixed on the first branch, the rotating seat is fixed on the second branch, the rotating frame is rotatably mounted on the rotating seat, the first extrusion wheel is rotatably mounted on the fixed plate, the second extrusion wheel is rotatably mounted on the rotating frame, or the first extrusion wheel is rotatably mounted on the rotating frame, and the second extrusion wheel is rotatably mounted on the fixed plate.

[0010] Furthermore, the fixed plate and the rotating frame are respectively fixed with a limiting plate on the side where the extrusion wheel is installed. The limiting plate is a C-shaped structure with an opening on one side, and an inner cavity is formed therein. The extrusion wheel is located in the inner cavity, and the extrusion wheel can rotate in the inner cavity.

[0011] Furthermore, the openings of the two limit plates respectively installed on the fixed plate and the rotating frame are arranged opposite to each other, and the outer peripheral surface of the extrusion tooth of the first extrusion wheel and the outer peripheral surface of the second extrusion wheel are respectively aligned with the side with the opening on their corresponding limit plates, and a limiting groove is also provided on the side with the opening on the limit plate, and the length direction of the limiting groove is consistent with the height direction of the limit plate.

[0012] Furthermore, it also includes an adjusting knob, an adjusting bracket and a driving block, the adjusting bracket is fixed on the second branch, the adjusting knob is rotatably mounted on the adjusting bracket, an eccentric shaft is connected to the adjusting knob, the eccentric shaft is rotatably connected to the driving block, the driving block is fixedly connected to the rotating frame, and the eccentric shaft is driven to rotate by rotating the adjusting knob, and then the rotating frame rotates under the drive of the driving block.

[0013] Furthermore, the plurality of extrusion teeth on the circumferential surface of the first extrusion wheel are arranged at equal intervals.

[0014] Furthermore, the cross-sectional shape of the extrusion tooth in its width direction is a rectangle.

[0015] According to another aspect of the present invention, the present invention also provides a method for breaking a ziplock bag, which includes the following steps: Step S1: rotating the rotating frame of the ziplock device to a set angle toward the side away from the fixed plate by rotating the adjusting knob of the ziplock device; Step S2: placing the ziplock bag between the first extrusion wheel and the second extrusion wheel of the ziplock device, and placing the outermost sealing clip chain of the ziplock bag into the limiting groove on the limiting plate of the ziplock device; Step S3: rotating the adjusting knob in the opposite direction so that the first extrusion wheel and the second extrusion wheel clamp the outermost sealing clip chain of the ziplock bag; Step S4: using a traction device to pull one end of the ziplock bag, the ziplock bag is pulled to move, and then drives the first extrusion wheel and the second extrusion wheel to rotate, when the first extrusion wheel and the second extrusion wheel rotate, the extrusion teeth on the first extrusion wheel squeeze the outermost sealing clip chain of the ziplock bag, thereby obtaining a ziplock bag with a point-breaking structure on the outermost sealing clip chain.

[0016] Furthermore, in step S4, the traction device is a roller. When the ziplock bag is towed, the ziplock bag needs to be firstly wound around the roller, and then the roller is driven to rotate, thereby achieving the traction movement of the ziplock bag.

[0017] Compared with the prior art, the present invention has one or more of the following beneficial effects:

[0018] (1) The point breaking device for the ziplock bag of the present application has a simple structure, low cost, and is easy to operate and maintain;

[0019] (2) The point breaking device of the ziplock bag of the present application is provided with a limiting groove, which can effectively limit the sealing clip chain when breaking the sealing clip chain to ensure the accuracy of the breaking point;

[0020] (3) The point breaking device of the ziplock bag of the present application is provided with an adjustment structure, which can flexibly adjust the extrusion distance between the two extrusion wheels according to the depth requirements of the breaking point and the thickness of the sealing clip chain;

[0021] (4) The point-breaking method of the self-sealing bag of the present application adopts a method of combining a point-breaking device with a traction device, and then realizes the extrusion wheel driven by the self-sealing bag to rotate to achieve the extrusion of the sealing clip chain, thereby obtaining a self-sealing bag with better point-breaking effect, higher yield rate, and excellent opening and closing sound effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the structure of the ziplock bag breaking device provided in an embodiment of the present application in the main viewing direction;

[0023] Figure 2 A schematic diagram of the structure of the ziplock bag breaking device provided in an embodiment of the present application in a top view;

[0024] Figure 3 A schematic diagram of the structure of the ziplock bag breaking device provided in an embodiment of the present application when viewed from the left;

[0025] Figure 4 A schematic diagram of the structure of the ziplock bag breaking device provided in an embodiment of the present application after the limiting plate and the first connecting plate are removed;

[0026] Figure 5 A schematic diagram of the structure of the first extrusion wheel of the ziplock bag breaking device provided in an embodiment of the present application in the main viewing direction;

[0027] Figure 6 A schematic diagram of the structure of the first extrusion wheel of the ziplock bag breaking device provided in an embodiment of the present application in a top view;

[0028] Figure 7 A schematic diagram of the structure of the second extrusion wheel of the ziplock bag breaking device provided in an embodiment of the present application in a top view;

[0029] Figure 8 A schematic diagram of the structure of the second extrusion wheel of the ziplock bag breaking device provided in an embodiment of the present application in a top view;

[0030] Fig. 9 A schematic diagram of the structure of the ziplock bag breaking device provided in an embodiment of the present application when a stop plate is installed;

[0031] Fig.10 A schematic diagram of the working state of two extrusion wheels of the ziplock bag breaking device provided in the embodiment of the application;

[0032] Fig.11 A schematic diagram of the structure of a ziplock bag provided in an application embodiment;

[0033] Fig.12 A schematic diagram of the cross-sectional structure of the ziplock bag provided in the application embodiment in its length direction.

[0034] Among them, 10-base, 101-first branch, 102-second branch, 20-first extrusion wheel, 201-extrusion tooth, 30-second extrusion wheel, 40-rotating shaft, 401-external thread, 402-tool hole, 50-fixed plate, 60-rotating seat, 70-rotating frame, 701-first connecting plate, 702-second connecting plate, 703-third connecting plate, 704-stop plate, 80-limiting plate, 801-limiting groove, 90-adjusting knob, 91-eccentric shaft, 100-adjusting bracket, 110-driving block, 120-self-sealing bag, 121-first sealing clip chain, 122-second sealing clip chain, 123-point breaking structure, 124-male clip chain, 125-female clip chain. DETAILED DESCRIPTION

[0035] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0036] See also Figures 1 to 12 , Figure 1 A schematic diagram of the structure of the ziplock bag breaking device provided in an embodiment of the present application in the main viewing direction; Figure 2 A schematic diagram of the structure of the ziplock bag breaking device provided in an embodiment of the present application in a top view; Figure 3 A schematic diagram of the structure of the ziplock bag breaking device provided in an embodiment of the present application when viewed from the left; Figure 4 A schematic diagram of the structure of the ziplock bag breaking device provided in an embodiment of the present application after the limiting plate and the first connecting plate are removed; Figure 5 A schematic diagram of the structure of the first extrusion wheel of the ziplock bag breaking device provided in an embodiment of the present application in the main viewing direction; Figure 6 A schematic diagram of the structure of the first extrusion wheel of the ziplock bag breaking device provided in an embodiment of the present application in a top view; Figure 7 A schematic diagram of the structure of the second extrusion wheel of the ziplock bag breaking device provided in an embodiment of the present application in a top view; Figure 8 A schematic diagram of the structure of the second extrusion wheel of the ziplock bag breaking device provided in an embodiment of the present application in a top view; Fig. 9 A schematic diagram of the structure of the ziplock bag breaking device provided in an embodiment of the present application when a stop plate is installed; Fig.10 A schematic diagram of the working state of two extrusion wheels of the ziplock bag breaking device provided in the embodiment of the application; Fig.11 A schematic diagram of the structure of a ziplock bag provided in an application embodiment; Fig.12 A schematic diagram of the cross-sectional structure of the ziplock bag provided in the application embodiment in its length direction.

[0037] Example

[0038] This embodiment provides a ziplock bag breaking device, which includes a base 10 and a first extrusion wheel 20 and a second extrusion wheel 30 rotatably mounted on the base 10. Figure 1 The rotation axis direction of the first extrusion wheel 20 is consistent with the rotation axis direction of the second extrusion wheel 30. The circumferential surface of the first extrusion wheel 20 and the circumferential surface of the second extrusion wheel 30 are opposite and spaced apart. A plurality of extrusion teeth 201 are spaced apart on the circumferential surface of the first extrusion wheel 20. The length direction of the extrusion teeth 201 is consistent with the axial direction of the first extrusion wheel 20. Figure 5 and Figure 6As shown. Preferably, 19 extrusion teeth 201 are evenly spaced on the circumferential surface of the first extrusion wheel 20, and the length of the extrusion teeth 201 is 6 mm and the width is 2 mm. Of course, the number and size of the extrusion teeth 201 are not limited to the above values. In specific implementation, the number and size of the extrusion teeth 201 can be designed as needed. The cross-sectional shape of the extrusion tooth 201 in its width direction is a rectangle. The first extrusion wheel 20 can be adjusted to be close to or away from the second extrusion wheel 30, or the second extrusion wheel 30 can be adjusted to be close to or away from the first extrusion wheel 20.

[0039] like Figure 2 As shown, the base 10 is U-shaped, and the base 10 has a first branch 101 and a second branch 102 arranged in parallel and spaced apart. The point breaking device also includes a fixed plate 50, a rotating seat 60 and a rotating frame 70. The fixed plate 50 is vertically fixed on the first branch 101. Preferably, the width direction of the fixed plate 50 is consistent with the length direction of the first branch 101, and the bottom end of the fixed plate 50 is fixedly connected to the first branch 101 through a fixed block, as shown in FIG. Figures 1 to 3 As shown. The rotating seat 60 is fixed on the second branch 102, and the rotating frame 70 is rotatably mounted on the rotating seat 60. Preferably, the rotating frame 70 can be movably connected to the rotating seat 60 by connecting members such as bolts or rivets. The first extrusion wheel 20 is rotatably mounted on the fixed plate 50, and the second extrusion wheel 30 is rotatably mounted on the rotating frame 70, or the first extrusion wheel 20 is rotatably mounted on the rotating frame 70, and the second extrusion wheel 30 is rotatably mounted on the fixed plate 50. In this embodiment, the technical solution will be explained by taking the first extrusion wheel 20 installed on the rotating frame 70 as an example.

[0040] The rotating shaft 40 of the first extrusion wheel 20 and the second extrusion wheel 30 is a screw structure with an external thread 401 at one end. The first extrusion wheel 20 and the second extrusion wheel 30 are respectively sleeved on their respective rotating shafts 40. The first extrusion wheel 20 and the second extrusion wheel 30 can be driven to rotate around their respective rotating shafts 40. Figure 6 and Figure 8 The other end of the rotating shaft 40 of the first extrusion wheel 20 and the second extrusion wheel 30 is provided with a tool hole 402, such as Figure 5 and Figure 7 As shown in the figure, a hexagonal hole is shown, and a hexagonal wrench of a corresponding type can be used to fix the rotating shaft 40 on the fixed plate 50 or the rotating frame 70 through the hexagonal hole. Of course, the above is only a schematic illustration of one shape of the tool hole 402. In a specific implementation, the tool hole 402 can also be any other shape.

[0041] The rotating frame 70 is preferably formed by three connecting plates. Figures 2 to 4 As shown, there are the first connecting plate 701, the second connecting plate 702 and the third connecting plate 703 in sequence, wherein the cross-sectional shape of the first connecting plate 701 is L-shaped, the second connecting plate 702 is vertically fixed to the upper half of the first connecting plate 701, the lower half of the first connecting plate 701 is rotatably connected to the rotating seat 60, the cross-sectional shape of the third connecting plate 703 is L-shaped, the third connecting plate 703 is vertically fixed to the second connecting plate 702, and the short side of the first connecting plate 701 is opposite to the short side of the second connecting plate 702, and the three connecting plates form a rectangular structure with a cavity in the middle.

[0042] The fixed plate 50 and the rotating frame 70 are also fixed with a limit plate 80 on the side where the extrusion wheel is installed. The limit plate 80 is a C-shaped structure with an opening on one side, and an inner cavity is formed therein. Preferably, the inner cavity is circular, and the diameter of the inner cavity is larger than the outer diameter of the first extrusion wheel 20 and the second extrusion wheel 30. The extrusion wheel is located in the inner cavity, which can ensure that the extrusion wheel can rotate in the inner cavity. Figure 1 As shown, preferably, a groove is provided on one side of the fixed plate 50, and the limiting plate 80 is embedded in the groove. The openings of the two limiting plates 80 respectively installed on the fixed plate 50 and the rotating frame 70 are arranged opposite to each other, and the outer circumference of the extrusion teeth 201 of the first extrusion wheel 20 and the outer circumference of the second extrusion wheel 30 are respectively aligned with the side with openings on the corresponding limiting plates 80, and the side with openings on the limiting plate 80 is also provided with a limiting groove 801, and the length direction of the limiting groove 801 is consistent with the height direction of the limiting plate 80.

[0043] In a further embodiment, the point breaking device further includes an adjustment knob 90, an adjustment bracket 100 and a driving block 110, such as Figure 2 and Figure 3 As shown. The adjusting bracket 100 is fixed on the second branch 102, and the adjusting knob 90 is rotatably mounted on the adjusting bracket 100. The adjusting knob 90 is connected with an eccentric shaft 91, and the eccentric shaft 91 is rotatably connected to the driving block 110, and the driving block 110 is fixedly connected to the third connecting plate 703 of the rotating frame 70. By rotating the adjusting knob 90, the eccentric shaft 91 is driven to rotate on the adjusting bracket 100, and then the rotating frame 70 is rotated under the drive of the driving block 110.

[0044] The rotation is also fixed with a stop plate 704, such as Fig. 9 As shown, the stop plate 704 is located on one side of the adjustment bracket 100, which can prevent the breaking device from being over-tightened when adjusting the knob 90, thereby avoiding damage to the limit plate 80 and the extrusion wheel.

[0045] This embodiment also provides a method for cutting a ziplock bag, which comprises the following steps:

[0046] Step S1: by rotating the adjusting knob 90 of the breaking device, the rotating frame 70 of the breaking device is rotated to a set angle toward a side away from the fixed plate 50;

[0047] Step S2: Place the ziplock bag between the first extrusion wheel 20 and the second extrusion wheel 30 of the point breaking device. Fig.10 And place the outermost sealing clip chain of the ziplock bag into the limiting groove 801 on the limiting plate 80 of the point breaking device;

[0048] Step S3: Reversely rotate the adjusting knob 90 to allow the first extrusion wheel 20 and the second extrusion wheel 30 to clamp the outermost sealing clip chain of the ziplock bag;

[0049] Step S4: Use a traction device to traction one end of the ziplock bag, the ziplock bag is traction movement, and then drives the first extrusion wheel 20 and the second extrusion wheel 30 to rotate. When the first extrusion wheel 20 and the second extrusion wheel 30 rotate, the extrusion teeth 201 on the first extrusion wheel 20 squeeze the outermost sealing clip chain of the ziplock bag, so as to obtain a ziplock bag with a point-breaking structure 123 on the outermost sealing clip chain, as shown in the figure. Among them, the traction device is a roller. When traction is performed on the ziplock bag, the ziplock bag needs to be firstly wound on the roller, and then the roller is driven to rotate, so as to achieve the traction movement of the ziplock bag. In the specific implementation, in order to better ensure the traction effect of the ziplock bag, another roller can be added between the above-mentioned roller and the point-breaking device. The roller can be set directly below the point-breaking device. The ziplock bag first passes under the roller and then is wound on another roller. In this way, it can be ensured that the traction force of the ziplock bag in the point-breaking device is always downward.

[0050] Through the above-mentioned point breaking method, we can obtain Fig.11 The ziplock bag sealing clip chain with a dotted structure 123 is shown. Fig.12It can be seen that the ziplock bag is provided with two groups of spaced-apart sealing clip chains from its opening inward, and each group of sealing clip chains includes a female clip chain 125 and a male clip chain 124, and the female clip chain 125 and its corresponding male clip chain 124 can be snap-connected. The sealing clip chain closer to the opening of the ziplock bag is now defined as the first sealing clip chain 121, and the sealing clip chain farther from the opening of the ziplock bag (i.e., the outermost sealing clip chain of the ziplock bag) is defined as the second sealing clip chain 122. The male and female clip chains of the two sealing clip chains are in opposite positions. By squeezing out a point-breaking structure 123 on the first sealing clip chain 121, the male and female clip chains of the first sealing clip chain 121 are deformed at the point-breaking position, so a rhythmic sound will occur during the process of pressing and disengaging the male and female clip chains, which serves as a prompt. At the same time, an indentation is formed on the outside of the sealing clip chain, which can also play an anti-slip role when pressing the sealed bag, and avoid the user's fingers from rubbing for a long time and causing a burning sensation. The double sealing ziplock design ensures that the ziplock bag has excellent sealing performance while having auditory feedback.

[0051] Compared with the prior art, the present invention has one or more of the following beneficial effects:

[0052] (1) The point breaking device for the ziplock bag of the present application has a simple structure, low cost, and is easy to operate and maintain;

[0053] (2) The point breaking device of the ziplock bag of the present application is provided with a limiting groove 801, which can effectively limit the sealing clip chain when breaking the sealing clip chain to ensure the accuracy of the breaking point;

[0054] (3) The point breaking device of the ziplock bag of the present application is provided with an adjustment structure, which can flexibly adjust the extrusion distance between the two extrusion wheels according to the depth requirements of the breaking point and the thickness of the sealing clip chain;

[0055] (4) The point-breaking method of the self-sealing bag of the present application adopts a method of combining a point-breaking device with a traction device, and then realizes the extrusion wheel driven by the self-sealing bag to rotate to achieve the extrusion of the sealing clip chain, thereby obtaining a self-sealing bag with better point-breaking effect, higher yield rate, and excellent opening and closing sound effect.

[0056] In this document, the terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of elements other than those listed and may also include additional elements not expressly listed.

[0057] In this document, the directional words such as front, back, top, and bottom are defined by the positions of the components in the drawings and the positions of the components relative to each other, and are only for the sake of clarity and convenience in expressing the technical solution. It should be understood that the use of the directional words should not limit the scope of protection claimed in this application.

[0058] In the absence of conflict, the above embodiments and features in the embodiments may be combined with each other.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A point breaking device for a ziplock bag, characterized in that: The invention comprises a base (10), and a first extrusion wheel (20) and a second extrusion wheel (30) rotatably mounted on the base (10); the rotation axis direction of the first extrusion wheel (20) is consistent with the rotation axis direction of the second extrusion wheel (30); the circumferential surface of the first extrusion wheel (20) and the circumferential surface of the second extrusion wheel (30) are opposite and arranged at intervals; a plurality of extrusion teeth (201) are arranged at intervals on the circumferential surface of the first extrusion wheel (20); the length direction of the extrusion teeth (201) is consistent with the axial direction of the first extrusion wheel (20); the first extrusion wheel (20) can be adjusted to be close to or away from the second extrusion wheel (30), or the second extrusion wheel (30) can be adjusted to be close to or away from the first extrusion wheel (20); The base (10) is U-shaped, and comprises a first branch (101) and a second branch (102) which are arranged in parallel and spaced apart; It also includes a fixed plate (50), a rotating seat (60) and a rotating frame (70), wherein the fixed plate (50) is vertically fixed on the first branch (101), the rotating seat (60) is fixed on the second branch (102), the rotating frame (70) is rotatably mounted on the rotating seat (60), the first extrusion wheel (20) is rotatably mounted on the fixed plate (50), and the second extrusion wheel (30) is rotatably mounted on the rotating frame (70), or the first extrusion wheel (20) is rotatably mounted on the rotating frame (70), and the second extrusion wheel (30) is rotatably mounted on the fixed plate (50); the fixed plate (50) and the rotating frame (70) are also respectively fixed with a limiting plate (80) on one side where the extrusion wheel is installed, and the limiting plate (80) is a C-shaped structure with an opening on one side, wherein an inner cavity is formed therein, and the extrusion wheel is located in the inner cavity, and the extrusion wheel can rotate in the inner cavity; It also includes an adjusting knob (90), an adjusting bracket (100) and a driving block (110); the adjusting bracket (100) is fixed on the second branch (102); the adjusting knob (90) is rotatably mounted on the adjusting bracket (100); an eccentric shaft (91) is connected to the adjusting knob (90); the eccentric shaft (91) is rotatably connected to the driving block (110); the driving block (110) is fixedly connected to the rotating frame (70); by rotating the adjusting knob (90), the eccentric shaft (91) is driven to rotate, and then the rotating frame (70) is rotated under the drive of the driving block (110).

2. The point breaking device for ziplock bags according to claim 1, characterized in that: The openings of the two limiting plates (80) respectively mounted on the fixed plate (50) and the rotating frame (70) are arranged opposite to each other, and the outer peripheral surface of the extrusion teeth (201) of the first extrusion wheel (20) and the outer peripheral surface of the second extrusion wheel (30) are respectively aligned with the side with the opening on the corresponding limiting plate (80), and the side with the opening on the limiting plate (80) is also provided with a limiting groove (801), and the length direction of the limiting groove (801) is consistent with the height direction of the limiting plate (80).

3. The point breaking device for ziplock bags according to claim 1, characterized in that: A plurality of extrusion teeth (201) on the circumferential surface of the first extrusion wheel (20) are arranged at equal intervals.

4. The point breaking device for ziplock bags according to claim 1, characterized in that: The cross-sectional shape of the extrusion tooth (201) in its width direction is a rectangle.

5. A method for cutting off a ziplock bag, characterized in that: It includes the following steps: Step S1: by rotating the adjusting knob (90) of the breaking device, the rotating frame (70) of the breaking device is rotated to a set angle toward a side away from the fixed plate (50); Step S2: placing the ziplock bag between the first extrusion wheel (20) and the second extrusion wheel (30) of the point breaking device, and placing the outermost sealing clip chain of the ziplock bag into the limiting groove (801) on the limiting plate (80) of the point breaking device; Step S3: Rotate the adjusting knob (90) in the reverse direction to make the first squeezing wheel (20) and the second squeezing wheel (30) clamp the outermost sealing clip chain of the ziplock bag; Step S4: Use a traction device to traction one end of the ziplock bag, the ziplock bag is pulled to move, thereby driving the first extrusion wheel (20) and the second extrusion wheel (30) to rotate. When the first extrusion wheel (20) and the second extrusion wheel (30) rotate, the extrusion teeth (201) on the first extrusion wheel (20) extrude the outermost sealing clip chain of the ziplock bag, thereby obtaining a ziplock bag with an outermost sealing clip chain having a dot-break structure (123).

6. The point breaking method of the ziplock bag according to claim 5, characterized in that: In step S4, the traction device is a roller. When traction is performed on the ziplock bag, the ziplock bag needs to be firstly wound around the roller, and then the roller is driven to rotate, thereby achieving the traction movement of the ziplock bag.

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