Plastic packaging equipment

Abstract

The utility model provides plastic packaging equipment which comprises a rack, a film supply device and a cutting device, the film supply device and the cutting device are both arranged on the rack, and the film supply device is arranged to supply a coating film; the notching device comprises a notching module, and the notching module comprises a driving mechanism; the rotating cutter body is provided with an avoiding part and a cutting part, the rotating cutter body is located on one side of the supplied coating film and is in transmission connection with the driving mechanism, and the avoiding part and the cutting part are sequentially arranged in the circumferential direction of the rotating cutter body; the rotating cutter body is driven to rotate based on the driving mechanism, the avoiding part is arranged to be spaced from the coating film when rotating to face the coating film, and the cutting part is arranged to abut against the coating film when rotating to face the coating film, so that an easy-to-tear opening is formed in the coating film. The plastic packaging equipment is simple in structure and low in manufacturing cost.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging, and more specifically, to a plastic sealing packaging device. Background Art

[0002] The existing plastic sealing packaging equipment includes a frame, a film supply device and a cutting device. The film supply device and the cutting device are both arranged on the frame. The film supply device is used to supply the covering film, and the cutting device is used to make an easy-tear opening on the supplied covering film. The cutting device includes a first driving mechanism, a second driving mechanism and a cutter. The first driving mechanism drives the cutter to move toward or away from the covering film, and the second driving mechanism drives the cutter to reciprocate in the conveying direction of the covering film. In order to prevent the cutter from tearing the covering film in the process of making the easy-tear opening, the speed of the cutter needs to be the same as the supply speed of the covering film during the movement of the second driving mechanism along the conveying direction of the covering film. The specific action process is: the first driving mechanism drives the cutter to move toward the covering film so that the cutter abuts against the covering film, and then the second driving mechanism drives the covering film to move along the conveying direction of the covering film so that the cutter makes an easy-tear opening on the covering film. After the easy-tear opening is made, the first driving mechanism and the second driving mechanism drive the cutter to reset. The plastic sealing packaging equipment has a complex structure and high manufacturing cost. Utility Model Content

[0003] The embodiment of the utility model provides a plastic sealing packaging device, which has a simple structure and low manufacturing cost.

[0004] The plastic sealing packaging equipment provided by the embodiment of the utility model includes a frame, a film supply device and a cutting device, the film supply device and the cutting device are both arranged on the frame, the film supply device is configured to supply a covering film; the cutting device includes a cutting module, the cutting module includes: a driving mechanism; and a rotating knife body having an avoidance portion and a cutting portion, the rotating knife body is located on one side of the supplied covering film and is transmission-connected to the driving mechanism, the avoidance portion and the cutting portion are sequentially arranged in the circumferential direction of the rotating knife body; based on the driving mechanism driving the rotating knife body to rotate, the avoidance portion is arranged to be spaced from the covering film when it rotates to face the covering film, and the cutting portion is arranged to abut against the covering film when it rotates to face the covering film to produce an easy-to-tear opening on the covering film.

[0005] In some exemplary embodiments, when the cutout portion abuts against the covering film, a linear speed of the cutout portion is configured to be the same as a supply speed of the covering film.

[0006] In some exemplary embodiments, the cutting device also includes: a second mounting frame, which is arranged on the frame, and the cutting module is arranged on the second mounting frame; and a film guide roller, which is located on the side of the coating film facing away from the rotating knife body and is rotatably arranged on the second mounting frame, and the film supply device is configured to supply the coating film to between the rotating knife body and the film guide roller; based on the driving mechanism driving the rotating knife body to rotate, the avoidance portion is arranged to be spaced from the portion of the coating film on the film guide roller when it rotates to face the portion of the coating film on the film guide roller, and the cutting portion is arranged to abut against the portion of the coating film on the film guide roller when it rotates to face the portion of the coating film on the film guide roller, and an easy-to-tear opening is produced on the portion of the coating film on the film guide roller.

[0007] In some exemplary embodiments, the second mounting bracket is provided with an elongated hole, and the film guiding roller is rotatably provided in the elongated hole and can move along the elongated hole toward and away from the rotating knife body; wherein a buffer member is provided between the second mounting bracket and the film guiding roller, and the buffer member is configured to make the cutout portion elastically contact with the portion of the coating film on the film guiding roller when the cutout portion is rotated to face the portion of the coating film on the film guiding roller.

[0008] In some exemplary embodiments, the cutout module is adjustably mounted on the second mounting frame.

[0009] In some exemplary embodiments, the plastic sealing packaging equipment further includes: a patch device, which is disposed on the frame and located downstream of the cutting device, and the patch device is configured to stick a tear patch on the easy-tear edge.

[0010] In some exemplary embodiments, the incision module further comprises: a transmission mechanism, which is disposed between the driving mechanism and the rotating blade body, and the rotating blade body is transmission-connected to the driving mechanism via the transmission mechanism.

[0011] In some exemplary embodiments, the transmission mechanism is a transmission gear mechanism, a transmission chain mechanism or a transmission belt mechanism.

[0012] In some exemplary embodiments, the driving mechanism is a motor, and the motor drives the rotary cutter body to rotate, so that the linear speed of the cutting portion is the same as the supply speed of the covering film.

[0013] In some exemplary embodiments, the rotating cutter body is a hob, the cutout portion is an open annular cutout or a closed annular cutout protruding from the circumferential surface of the hob, and the avoidance portion is an area outside the open annular cutout or the closed annular cutout on the circumferential surface of the hob.

[0014] In some exemplary embodiments, the transmission mechanism includes a driving wheel, a driven wheel and a first mounting frame, the driving mechanism is arranged on the first mounting frame, the driving wheel is arranged on the driving mechanism, the driven wheel is rotatably arranged on the first mounting frame and fixedly connected to the rotating blade body, and the driving wheel and the driven wheel are transmission-connected; the incision module also includes: a detection mechanism, one of the driving wheel, the driven wheel and the rotating blade body is provided with an identification part, and the detection mechanism is configured to detect the identification part.

[0015] In some exemplary embodiments, the detection mechanism is a photoelectric sensor, which is located on one side of the driving wheel. The identification part is provided on the side of the driving wheel facing the photoelectric sensor, and the photoelectric sensor and the identification part are opposite to the circumference of the side of the driving wheel.

[0016] In some exemplary embodiments, the first mounting frame includes: a first connecting member and a second connecting member arranged opposite to each other, the detection mechanism is fixed on a side of the first connecting member facing the second connecting member, the driving mechanism is fixed on a side of the second connecting member facing away from the first connecting member, the driving wheel, the driven wheel and the rotating blade body are all located between the first connecting member and the second connecting member, and the driven wheel is rotatably provided on the second connecting member, and the rotating blade body is located between the first connecting member and the driven wheel; and a third connecting member connecting the first connecting member and the second connecting member.

[0017] The plastic sealing packaging equipment provided by the embodiment of the utility model only requires one driving mechanism for the cutting device, and its structure is simpler and the manufacturing cost is lower. Moreover, the driving mechanism drives the rotating knife body to rotate, and the avoidance part is separated from the covering film and does not contact the covering film when it rotates to face the covering film. At this time, the rotating knife body will not interfere with the normal conveying of the covering film, and the cutting part abuts against the covering film and contacts the covering film when it rotates to face the covering film to produce an easy-to-tear opening on the covering film. This solution has a simple structure.

[0018] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by implementing the utility model. The purpose and other advantages of the utility model can be realized and obtained through the structures particularly pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the technical solution of the utility model and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the utility model and do not constitute a limitation on the technical solution of the utility model.

[0020] Figure 1A schematic diagram of the three-dimensional structure of the incision device provided in some embodiments;

[0021] Figure 2 for Figure 1 The schematic diagram of the exploded structure of the cutting device shown, the second mounting frame is not shown;

[0022] Figure 3 A schematic diagram of a three-dimensional structure of a plastic packaging device provided in some embodiments from one perspective;

[0023] Figure 4 for Figure 3 A three-dimensional structural schematic diagram of the plastic packaging equipment from another perspective;

[0024] Figure 5 for Figure 4 The three-dimensional structural schematic diagram of the plastic packaging equipment after removing the covering film is shown.

[0025] The corresponding relationship between the reference numerals and the component names is as follows:

[0026] 100 frame, 200 cutting device, 210 cutting module, 211 driving mechanism, 212 rotating knife body, 2121 avoidance part, 2122 cutting part, 213 transmission mechanism, 2131 driving wheel, 21311 identification part, 2132 driven wheel, 2133 first mounting frame, 21331 first connecting piece, 21332 second connecting piece, 21333 third connecting piece, 2134 transmission belt, 214 detection mechanism, 2141 detection gap, 220 second mounting frame, 221 fourth connecting piece, 222 fifth connecting piece, 223 adjusting beam, 230 film guide roller, 240 buffer spring, 300 film supply device, 400 coating film, 500 patch device, 600 folding device. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the utility model more clear, the embodiments of the utility model will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other arbitrarily without conflict.

[0028] The plastic packaging equipment provided by this application is Figures 1 to 5 As shown, it includes a frame 100 and a cutting device 200, and the cutting device 200 is arranged on the frame 100. Figure 1 and Figure 2As shown, the cutting device 200 includes a cutting module 210, which includes: a driving mechanism 211; and a rotating blade body 212 having an avoidance portion 2121 and a cutting portion 2122, wherein the avoidance portion 2121 and the cutting portion 2122 are sequentially arranged in the circumferential direction of the rotating blade body 212. The rotating blade body 212 is in transmission connection with the driving mechanism 211, and the driving mechanism 211 is configured to drive the rotating blade body 212 to rotate in a controlled manner.

[0029] The cutting device 200 only requires one driving mechanism 211, and has a simpler structure and lower manufacturing cost.

[0030] In some examples, such as Figures 3 to 5 As shown, the plastic packaging equipment further includes: a film supply device 300, which is arranged on the frame 100 and is configured to supply the covering film 400, and the rotating blade body 212 is located on one side of the covering film 400. Based on the driving mechanism 211 driving the rotating blade body 212 to rotate, the avoidance portion 2121 is configured to be spaced from the covering film 400 when rotating toward the covering film 400, and the incision portion 2122 is configured to abut against the covering film 400 when rotating toward the covering film 400. Preferably, the linear speed of the incision portion 2122 is set to be the same as the supply speed of the covering film 400 (which can be achieved by a synchronizer).

[0031] The driving mechanism 211 drives the rotating blade body 212 to rotate, and the film supply device 300 supplies the coating film 400. The avoidance portion 2121 is separated from the coating film 400 and does not contact the coating film 400 when it rotates toward the coating film 400 (that is, the avoidance portion 2121 does not contact the coating film 400 when it rotates toward the coating film 400). At this time, the rotating blade body will not interfere with the normal transportation of the coating film, and the incision portion 2122 abuts against the coating film 400 and contacts the coating film 400 when it rotates toward the coating film 400, thereby producing an easy-to-tear opening on the coating film 400 (that is, the incision portion 2122 contacts the coating film 400 when it rotates toward the coating film 400, thereby producing an easy-to-tear opening on the coating film 400). The linear speed of the cutout portion 2122 is the same as the supply speed of the covering film 400 , so that the rotating cutout portion 2122 will not tear the covering film 400 during the process of making the easy-tear edge.

[0032] In some examples, such as Figure 1 and Figure 2As shown, the incision module 210 also includes: a transmission mechanism 213, the transmission mechanism 213 is arranged between the driving mechanism 211 and the rotating blade body 212, and the rotating blade body 212 is connected to the driving mechanism 211 through the transmission mechanism 213. Of course, it is also possible that the rotating blade body 212 is directly installed on the rotating shaft of the driving mechanism 211, and the rotating blade body 212 is directly controlled to rotate by the driving mechanism 211, which can also achieve the purpose of this application. Its purpose does not deviate from the design concept of the utility model, and will not be repeated here, and it should also fall within the protection scope of this application.

[0033] In some embodiments, Figure 1 and Figure 2 As shown, the driving mechanism 211 is configured as a motor. When the motor drives the rotating blade body 212 to rotate, the linear speed of the cutout portion 2122 is the same as the supply speed of the coating film 400, so that the cutout portion 2122 will not tear the coating film 400 when in contact with the coating film 400. The motor is preferably a servo motor. The plastic packaging equipment drives the servo motor to rotate periodically. Each time the servo motor rotates, the cutout portion 2122 makes an easy-tear cut at a position where an easy-tear cut is required on the coating film 400, thereby achieving the easy-tear cuts at positions where an easy-tear cut is required on the coating film 400. When the driving mechanism 211 stops, the avoidance portion 2121 faces the coating film 400 without contacting the coating film 400. At this time, the rotating blade body 212 will not interfere with the normal downstream transportation of the coating film 400.

[0034] It can be, for example Figure 1 and Figure 2 As shown, only one cutout portion 2122 is provided on the circumference of the rotating blade body 212, so that the cutout portion 2122 makes an easy-to-tear cut at the position where an easy-to-tear cut is required on the coating film 400 for each rotation of the servo motor; or it may be that two cutout portions 2122 are provided on the circumference of the rotating blade body 212 (not shown in this scheme), so that the cutout portion 2122 makes an easy-to-tear cut at two adjacent positions where an easy-to-tear cut is required on the coating film 400 for each rotation of the servo motor, and the angle between the two cutout portions 2122 is preferably set to 180 degrees. At this time, the rotating blade body 212 makes one movement The present invention can be implemented as follows: the rotary blade 212 is provided with three cutouts 2122 (not shown in the diagram of this scheme) on the circumference of the rotary blade 212, so that each time the servo motor rotates one circle, the cutouts 2122 respectively make an easy-to-tear opening at three adjacent positions on the coating film 400 where an easy-to-tear opening is required, and the angle between two adjacent cutouts 2122 is preferably set to 120 degrees. At this time, the rotary blade 212 rotates 120 degrees each time it moves, etc.; all of the above can achieve the purpose of the present application, and its purpose does not deviate from the design concept of the present utility model, and will not be repeated here, and should all fall within the protection scope of the present application.

[0035] The transmission mechanism 213 may be configured as a transmission gear mechanism; or the transmission mechanism 213 may be configured as a transmission chain mechanism; or Figure 1 and Figure 2 As shown, the transmission mechanism 213 is configured as a transmission belt mechanism, etc.; the above can achieve the purpose of this application, and its purpose does not deviate from the design concept of the utility model, and will not be repeated here, and should all fall within the protection scope of this application.

[0036] In some embodiments, Figure 1 and Figure 2 As shown, the rotating blade body 212 is configured as a roller cutter, the cutout portion 2122 is configured as an open annular cutout (such as a C-shaped cutout or a U-shaped cutout, etc.) or a closed annular cutout (such as a circular cutout or an elliptical annular cutout or a polygonal cutout, etc.) convexly disposed on the circumference of the roller cutter, and the avoidance portion 2121 is configured as an area outside the open annular cutout or the closed annular cutout on the circumference of the roller cutter. Since the cutout portion 2122 is convexly disposed on the circumference of the roller cutter, the avoidance portion 2121 can be spaced from the coating film 400 when rotating toward the coating film 400 without contacting the coating film 400, so that the rotating blade body 212 will not interfere with the normal conveying of the coating film 400 to the downstream.

[0037] In some embodiments, Figure 2 As shown, the transmission mechanism 213 includes a driving wheel 2131, a driven wheel 2132 and a first mounting frame 2133. The driving wheel 2131 is arranged on the driving mechanism 211, and the driven wheel 2132 is rotatably arranged on the first mounting frame 2133 and fixedly connected to the rotating blade body 212 through a connecting shaft. The driving wheel 2131 and the driven wheel 2132 are in transmission connection. It can be that the driving wheel 2131 is a driving gear, and the driven wheel 2132 is a driven gear, and the driving gear and the driven gear (the driving gear and the driven gear are preferably synchronous gears) are meshed to achieve transmission connection; or it can be that the driving wheel 2131 is a driving pulley, and the driven wheel 2132 is a driven pulley, and the driving pulley and the driven pulley are connected to each other through a transmission belt 2134 (preferably a synchronous belt); or it can be that the driving wheel 2131 is a driving sprocket, and the driven wheel 2132 is a driven sprocket, and the driving sprocket and the driven sprocket are connected to each other through a chain (preferably a synchronous chain); all of the above can achieve the purpose of the present application, and their purpose does not deviate from the design idea of ​​the present utility model, and will not be repeated here, and should all fall within the protection scope of the present application.

[0038] Furthermore, if Figure 1 and Figure 2As shown, the incision module 210 also includes: a detection mechanism 214, one of the driving wheel 2131, the driven wheel 2132 and the rotating blade body 212 is provided with an identification part 21311, and the detection mechanism 214 is configured to detect the identification part 21311, and the number of the identification parts 21311 is the same as the number of the incision parts 2122. This scheme is used to eliminate the rotation error of the rotating blade body 212, and ensure that the incision part 2122 accurately makes an easy-tear cut at the position where the easy-tear cut is required on the coating film 400. In the present application, the number of the identification part 21311 and the incision part 2122 is set to one.

[0039] Furthermore, if Figure 1 and Figure 2 As shown, the detection mechanism 214 is configured as a photoelectric sensor, which is located on one side of the driving wheel 2131. The side of the driving wheel 2131 facing the photoelectric sensor is provided with an identification portion 21311, and the photoelectric sensor and the identification portion 21311 are opposite to each other on the circumference of the side of the driving wheel 2131. This ensures that after each movement of the rotating blade 212, the photoelectric sensor can accurately detect the identification portion 21311, and when the photoelectric sensor detects the identification portion 21311 (that is, the identification portion 21311 is at a position opposite to the photoelectric sensor), the driving mechanism 211 stops. Accordingly, each time the driving mechanism 211 is started, the identification portion 21311 starts to rotate with the rotating blade 212 from the position opposite to the photoelectric sensor. It can be that the photoelectric sensor has a detection gap 2141, and the identification part 21311 is a shielding protrusion. When the shielding protrusion rotates into the detection gap 2141, the photoelectric sensor detects the identification part 21311. At this time, the plastic sealing packaging equipment controls the driving mechanism 211 to stop, and the rotating knife body 212 just completes the action of making an easy-to-tear edge.

[0040] Furthermore, if Figure 1 and Figure 2 As shown, the first mounting frame 2133 includes: a first connecting member 21331 and a second connecting member 21332 arranged opposite to each other, the photoelectric sensor is fixedly arranged on the side of the first connecting member 21331 facing the second connecting member 21332, the driving mechanism 211 is fixedly arranged on the side of the second connecting member 21332 facing away from the first connecting member 21331, the driving wheel 2131, the driven wheel 2132 and the rotating blade body 212 are all located between the first connecting member 21331 and the second connecting member 21332, the opening of the detection notch 2141 faces the driving wheel 2131, the driven wheel 2132 is rotatably arranged on the second connecting member 21332, and the rotating blade body 212 is located between the first connecting member 21331 and the driven wheel 2132; and a third connecting member 21333, the third connecting member 21333 connects the first connecting member 21331 and the second connecting member 21332.

[0041] In some examples, such as Figure 1As shown, the cutting device 200 further includes: a second mounting frame 220, the cutting module 210 is fixedly mounted on the second mounting frame 220 through a third connecting member 21333; and a film guide roller 230, the film guide roller 230 is rotatably mounted on the second mounting frame 22, and the cutting module 210 is located at one side of the film guide roller 230. Based on the driving mechanism 211 driving the rotating blade body 212 to rotate, the avoidance portion 2121 is configured to be spaced from the circumference of the film guide roller 230 when rotating to face the circumference of the film guide roller 230, and the cutting portion 2122 is configured to abut against the circumference of the film guide roller 230 when rotating to face the circumference of the film guide roller 230.

[0042] The coating film 400 passes through between the film guiding roller 230 and the rotating knife body 212, and the avoidance portion 2121 is spaced apart from the portion of the coating film 400 on the film guiding roller 400 when rotating toward the film guiding roller 400 (that is, the avoidance portion 2121 is always spaced apart from the coating film 400), and the incision portion 2122 is abutted against the portion of the coating film 400 on the film guiding roller 400 when rotating toward the film guiding roller 400. The incision portion 2122 is supported by the film guiding roller 400. This solution can better ensure that the incision portion 2122 produces an easy-to-tear opening on the coating film 400.

[0043] Of course, it is also possible that the cutout portion 2122 never contacts the film guiding roller 400, but abuts against the portion of the coating film 400 outside the film guiding roller 400 to produce an easy-to-tear edge on the coating film 400. However, the easy-to-tear edge produced by the cutout portion 2122 in this solution is unstable and difficult to control.

[0044] Among them, Figure 1 As shown, the second mounting frame 220 is provided with an elongated hole, and the film guide roller 230 is rotatably arranged in the elongated hole and can move along the elongated hole toward and away from the rotating blade body 212; furthermore, a buffer is arranged between the film guide roller 230 and the second mounting frame 220, and the buffer is arranged so that when the cutout portion 2122 rotates to face the peripheral surface of the film guide roller 230, the cutout portion 2122 elastically abuts against the peripheral surface of the film guide roller 230 instead of rigidly abutting against it, so that the service life of the rotating blade body 212 and the film guide roller 230 can be effectively extended. The buffer may be arranged as a buffer spring 240 or a buffer pad (buffer pad such as a rubber pad or a silicone pad, etc.) and other structures.

[0045] Furthermore, if Figure 1As shown, the second mounting frame 220 includes: a fourth connecting member 221 and a fifth connecting member 222 which are arranged opposite to each other, and the fourth connecting member 221 and the fifth connecting member 222 are both provided with long strip holes; an adjusting beam 223, the adjusting beam 223 is located between the fourth connecting member 221 and the fifth connecting member 222, and connects the fourth connecting member 221 and the fifth connecting member 222, and the incision module 210 is fixed to the adjusting beam 223 in an adjustable position through the third connecting member 21333. For different covering films 400 (different covering films 400 have different positions in the width direction where the easy-tear opening needs to be made), the easy-tear opening can be made by adjusting the fixed position of the third connecting member 21333 on the adjusting beam 223. The film guide roller 230 is located on one side of the adjusting beam 223 and is rotatably and movably arranged at the long holes of the fourth connecting member 221 and the long holes of the fifth connecting member 222 at both ends. The film guide roller 230 is configured to guide the coating film 400 to be transported downstream from between the film guide roller 230 and the rotating knife body 212.

[0046] Of course, an adjustment mechanism can also be provided to move the cutting module 210 toward the film guide roller 230 or away from the film guide roller 230 (not shown in this scheme diagram) to adjust the relative positions of the rotating blade body 212 and the film guide roller 230, so that the cutting portion 2122 can better produce an easy-to-tear opening on the coating film 400, and the purpose of the present application can also be achieved. Its purpose does not deviate from the design concept of the present utility model, and will not be repeated here, and should also fall within the scope of protection of the present application.

[0047] Furthermore, if Figure 1 As shown, a buffer spring 240 is provided between the film guiding roller 230 and the fourth connecting member 221, and between the film guiding roller 230 and the fifth connecting member 222. The buffer spring 240 is configured to make the cutout portion 2122 elastically conflict with the circumference of the film guiding roller 230 when the cutout portion 2122 rotates to face the circumference of the film guiding roller 230. Wherein, the coating film 400 is located between the film guiding roller 230 and the rotating blade body 212. It can be that the buffer spring 240 is located on the side of the film guiding roller 230 facing away from the coating film 400 (for example, the buffer spring 240 is a compressed coil spring, which is not shown in this scheme, and the buffer spring 240 can also be replaced by a buffer pad), so that the cutout portion 2122 elastically conflicts with the portion of the coating film 400 that is on the film guiding roller 400. Of course, it can also be, Figure 1 As shown, the buffer spring 240 is located on the side of the film guide roller 230 facing the coating film 400 (such as the buffer spring 240 is a tensioned coil spring), which can also achieve the purpose of the present application. Its purpose does not deviate from the design concept of the present utility model, and will not be repeated here, and should also fall within the scope of protection of the present application.

[0048] Among them, Figure 1 and Figure 2As shown, the first connecting member 21331, the second connecting member 21332, the third connecting member 21333 and the fourth connecting member 221 are all configured as connecting plates, and the third connecting member 21333 is configured to adjust the position along the axial direction of the adjusting beam 223, and the axial direction of the adjusting beam 223 is parallel to the side of the coating film 400.

[0049] In some embodiments, Figures 3 to 5 As shown, the plastic packaging equipment further includes a patch device 500, a folding device 600 and a sealing and cutting device. The patch device 500, the folding device 600 and the sealing and cutting device are all arranged on the frame 100, and the patch device 500 is located downstream of the cutting device 200 and is arranged to paste the tear patch at the easy tearing opening. The folding device 600 is located downstream of the patch device 500 and is arranged to fold the traveling covering film 400 in half, and at this time, the tear patch is located on the inner side of the folded covering film 400. The folded covering film 400 enters the sealing and cutting device, and after being turned outward by the everting mechanism of the sealing and cutting device, the tear patch is exposed on the outer side of the covering film 400 again, and then the sealing and cutting mechanism of the sealing and cutting device plastic-packages the turned-out covering film 400 on the product. After the covering film 400 is finally covered on the product, the tear-off patch is located on the exposed surface of the covering film 400 , so that the covering film on the product can be easily torn off through the tear-off patch.

[0050] To sum up, in the plastic sealing packaging equipment provided by the embodiment of the utility model, the cutting device only needs one driving mechanism, and its structure is simpler and the manufacturing cost is lower; moreover, the driving mechanism drives the rotating knife body to rotate, and the avoidance part is separated from the covering film and does not contact the covering film when it rotates to face the covering film. At this time, the rotating knife body will not interfere with the normal conveying of the covering film, and the cutting part abuts against the covering film and contacts the covering film when it rotates to face the covering film to produce an easy-to-tear opening on the covering film. This scheme has a simple structure.

[0051] In the description of the present invention, it should be noted that the terms "upper", "lower", "one side", "the other side", "one end", "the other end", "side", "relative", "four corners", "periphery", "mouth" structure, etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the structure referred to has a specific orientation, is constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0052] In the description of the embodiments of the present utility model, unless otherwise clearly specified and limited, the terms "connection", "direct connection", "indirect connection", "fixed connection", "installation", and "assembly" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; the terms "installation", "connection", and "fixed connection" can be a direct connection, or an indirect connection through an intermediate medium, or the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0053] Although the implementation methods disclosed in the utility model are as above, the above contents are only implementation methods adopted to facilitate the understanding of the utility model, and are not used to limit the utility model. Any technician in the field to which the utility model belongs can make any modifications and changes in the form and details of implementation without departing from the spirit and scope disclosed in the utility model, but the scope of patent protection of the utility model shall still be defined by the attached claims.

Claims

1. A plastic packaging device, characterized in that: The invention comprises a frame, a film supply device and a cutting device, wherein the film supply device and the cutting device are both arranged on the frame, and the film supply device is arranged to supply a covering film; the cutting device comprises a cutting module, and the cutting module comprises: A drive mechanism; and A rotating blade body having an avoidance portion and a notch portion, the rotating blade body being located on one side of the supplied coating film and being transmission-connected to the driving mechanism, the avoidance portion and the notch portion being sequentially arranged in the circumferential direction of the rotating blade body; Based on the driving mechanism driving the rotating blade to rotate, the avoidance portion is arranged to be spaced from the coating film when it rotates toward the coating film, and the cutting portion is arranged to abut against the coating film when it rotates toward the coating film to produce an easy-to-tear opening on the coating film.

2. The plastic packaging equipment according to claim 1, characterized in that: The incision device also includes: A second mounting frame, disposed on the frame, the cutout module being disposed on the second mounting frame; and A film guide roller is located on a side of the coating film facing away from the rotating blade body and is rotatably arranged on the second mounting frame, and the film supply device is configured to supply the coating film between the rotating blade body and the film guide roller; Based on the driving mechanism driving the rotating blade to rotate, the avoidance portion is arranged to be spaced apart from the portion of the coating film on the film guide roll when it rotates toward the portion of the coating film on the film guide roll, and the cutting portion is arranged to be in contact with the portion of the coating film on the film guide roll when it rotates toward the portion of the coating film on the film guide roll, and an easy-to-tear opening is produced on the portion of the coating film on the film guide roll.

3. The plastic packaging equipment according to claim 2, characterized in that: The second mounting frame is provided with an elongated hole, and the film guiding roller is rotatably arranged in the elongated hole and can move along the elongated hole toward and away from the rotating blade body; Wherein, a buffer is provided between the second mounting frame and the film guiding roller, and the buffer is configured to make the cutout portion elastically contact with the portion of the coating film on the film guiding roller when the cutout portion is rotated toward the portion of the coating film on the film guiding roller.

4. The plastic packaging equipment according to claim 2, characterized in that: The cutout module is adjustably arranged on the second mounting frame.

5. The plastic sealing packaging equipment according to any one of claims 1 to 4, characterized in that: Also includes: The patch device is arranged on the frame and located downstream of the cutting device. The patch device is configured to stick a tear patch on the easy-tear opening.

6. The plastic sealing packaging equipment according to any one of claims 1 to 4, characterized in that: The incision module also includes: The transmission mechanism is arranged between the driving mechanism and the rotating cutter body, and the rotating cutter body is connected to the driving mechanism through the transmission mechanism.

7. The plastic packaging equipment according to claim 6, characterized in that: The transmission mechanism is a transmission gear mechanism, a transmission chain mechanism or a transmission belt mechanism; or The driving mechanism is a motor, and the motor drives the rotary cutter body to rotate, so that the linear speed of the cutting portion is the same as the supply speed of the coating film; or The rotating cutter body is a hob, the cutout portion is an open annular cutout or a closed annular cutout convexly provided on the circumference of the hob, and the avoidance portion is an area on the circumference of the hob outside the open annular cutout or the closed annular cutout; or When the cutout portion contacts the covering film, the linear speed of the cutout portion is set to be the same as the supply speed of the covering film.

8. The plastic packaging equipment according to claim 6, characterized in that: The transmission mechanism comprises a driving wheel, a driven wheel and a first mounting frame, the driving mechanism is arranged on the first mounting frame, the driving wheel is arranged on the driving mechanism, the driven wheel is rotatably arranged on the first mounting frame and is fixedly connected to the rotating cutter body, and the driving wheel and the driven wheel are in transmission connection; the incision module also comprises: A detection mechanism, wherein one of the driving wheel, the driven wheel and the rotating cutter body is provided with an identification portion, and the detection mechanism is configured to detect the identification portion.

9. The plastic sealing packaging equipment according to claim 8, characterized in that: The detection mechanism is a photoelectric sensor, which is located on one side of the driving wheel. The identification part is provided on the side of the driving wheel facing the photoelectric sensor. The photoelectric sensor and the identification part are opposite to each other on the circumference of the side of the driving wheel.

10. The plastic sealing packaging equipment according to claim 8, characterized in that: The first mounting frame comprises: A first connecting member and a second connecting member are arranged opposite to each other, the detecting mechanism is fixedly arranged on a side of the first connecting member facing the second connecting member, the driving mechanism is fixedly arranged on a side of the second connecting member facing away from the first connecting member, the driving wheel, the driven wheel and the rotating blade body are all located between the first connecting member and the second connecting member, and the driven wheel is rotatably arranged on the second connecting member, and the rotating blade body is located between the first connecting member and the driven wheel; and The third connecting member connects the first connecting member and the second connecting member.

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