Plastic packaging equipment

Abstract

The utility model provides plastic packaging equipment which comprises a rack, a film supply device, a cutting device and a film guide roller capable of being rotationally installed, and the film supply device, the cutting device and the film guide roller are all arranged on the rack. The notching device comprises a notching module, the notching module comprises a mounting seat, a driving unit and a rotary cutter body, the driving unit is arranged on the mounting seat, the rotary cutter body is mounted on the driving unit in a one-way rotating mode and is matched with the film guide roller for use, and an avoiding part, a rotary matching part and a notching part are arranged on the circumferential surface of the rotary cutter body. The avoiding part and the rotary matching part are sequentially arranged in the circumferential direction of the rotary cutter body, the notch part and the rotary matching part correspond to each other in the axial position of the rotary cutter body, and the film supply device is arranged to supply a coating film between the rotary cutter body and the film guide roller. The plastic packaging equipment is low in manufacturing cost and good in easy-to-tear opening manufacturing effect.

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 main body, a film supply device and a cutting device. The film supply device and the cutting device are both arranged on the main body. 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 manufacturing cost of the plastic sealing packaging equipment is high, and the effect of making the easy-tear opening is not good. Utility Model Content

[0003] The embodiment of the utility model provides a plastic sealing packaging device, which has low manufacturing cost and good effect of making easy-tear edges.

[0004] The plastic sealing packaging equipment provided by the embodiment of the utility model includes a frame, a film supply device, a cutting device and a rotatably mounted film guide roller, all of which are arranged on the frame; the cutting device includes a cutting module, the cutting module includes a mounting seat, a driving unit and a rotating knife body, the driving unit is arranged on the mounting seat, the rotating knife body can be unidirectionally mounted on the driving unit, and is arranged to be used in conjunction with the film guide roller, the circumferential surface of the rotating knife body is provided with an avoidance portion, a rotational matching portion and a cutting portion, the avoidance portion and the rotational matching portion are arranged in sequence in the circumferential direction of the rotating knife body, the cutting portion and the rotational matching portion correspond to each other in the axial position of the rotating knife body, and the film supply device is arranged to move toward the The coating film is supplied between the rotating knife body and the film guide roller; when the avoidance portion faces the portion of the coating film on the film guide roller, the avoidance portion is spaced apart from the portion of the coating film on the film guide roller; when the driving unit drives the rotating knife body to rotate a set angle along its unidirectional rotation direction and makes the rotating matching portion face the portion of the coating film on the film guide roller, the rotating matching portion abuts against the portion of the coating film on the film guide roller, and the coating film drives the rotating matching portion to rotate along the unidirectional rotation direction of the rotating knife body, and an easy-to-tear opening is produced by the abutment of the incision portion with the portion of the coating film on the film guide roller.

[0005] In some exemplary embodiments, the driving unit is a motor.

[0006] In some exemplary embodiments, the motor is a stepper motor.

[0007] In some exemplary embodiments, the driving unit includes a driving mechanism, a transmission mechanism and a locking mechanism, the driving mechanism is fixed to the mounting seat, the transmission mechanism and the locking mechanism are both movably mounted on the mounting seat and cooperate with the driving mechanism, the rotating cutter body can be mounted on the transmission mechanism unidirectionally, and the locking mechanism is locked or unlocked with the transmission mechanism; the driving mechanism is in a first state, the locking mechanism is located in a first position and is locked with the transmission mechanism, the avoidance portion faces the portion of the coating film on the film guide roller, and is spaced from the portion of the coating film on the film guide roller; the driving mechanism changes from the first state to the second state, the driving mechanism first drives the locking mechanism to move from the first position to the third position and unlocks the transmission mechanism, and the driving mechanism then drives the transmission mechanism and the rotating cutter body to swing along the unidirectional rotation direction of the rotating cutter body by the set angle, so that the rotating matching portion abuts against the portion of the coating film on the film guide roller.

[0008] In some exemplary embodiments, the driving mechanism includes a main body and a reciprocating member, the main body is connected to the reciprocating member, one of the reciprocating member and the transmission mechanism has a hinge shaft, and the other has a first elongated hole, the hinge shaft is rotatably disposed in the first elongated hole and can move in the first elongated hole, so that when the driving mechanism changes from the first state to the second state, the locking mechanism is first driven to move from the first position to the third position, and then the transmission mechanism and the rotating cutter body are driven to swing together to a set angle.

[0009] In some exemplary embodiments, the locking mechanism has a first hinged portion, a second hinged portion and a locking portion, the transmission mechanism has a locking matching portion, the first hinged portion is transmission-connected to the reciprocating member, and the second hinged portion is hinge-connected to the mounting seat; the driving mechanism is in the first state, the reciprocating member is in the fourth position, and the locking portion cooperates with the locking matching portion to be locked; the driving mechanism changes from the first state to the second state, the reciprocating member moves from the fourth position to the fifth position, and the locking mechanism is first driven to swing from the first position to the third position so that the locking portion is separated from the locking matching portion and unlocked, and then the transmission mechanism and the rotating cutter body are driven to swing together to a set angle and the locking mechanism is driven to swing from the third position to the second position to keep the locking portion and the locking matching portion unlocked, and the third position is located between the first position and the second position.

[0010] In some exemplary embodiments, one of the locking portion and the locking mating portion is a convex locking tongue, and the other is a concave locking groove, the locking tongue is located in the locking groove to lock, and the locking tongue is located outside the locking groove to unlock.

[0011] In some exemplary embodiments, the transmission mechanism and the locking mechanism are both located between the driving mechanism and the film guiding roller, the second hinged portion is located between the first hinged portion and the locking portion, the rotating blade body is located on the side of the transmission mechanism facing away from the mounting seat, the reciprocating member is equipped with a first return spring, and the locking mechanism is equipped with a second return spring.

[0012] In some exemplary embodiments, the driving mechanism includes a main body and a reciprocating member, the main body is connected to the reciprocating member, and the incision device also includes: a buffer mechanism, and one of the transmission mechanism, the locking mechanism and the reciprocating member is provided with a supporting portion, and when the driving mechanism is reset from the second state to the first state, the supporting portion abuts against the buffer mechanism.

[0013] In some exemplary embodiments, the rotating blade body has a blade shaft, and the blade shaft is rotatably mounted on the driving unit via a one-way bearing.

[0014] In some exemplary embodiments, the avoidance portion, the rotational fitting portion and the cutout portion include one group or a plurality of groups sequentially arranged in the circumferential direction of the rotating blade body.

[0015] In some exemplary embodiments, the incision device also includes: a mounting frame, provided with a second elongated hole, and the mounting seat is arranged on the mounting frame; the film guiding roller, the incision module is located on one side of the film guiding roller, and the film guiding roller is rotatably provided in the second elongated hole and can move toward and away from the rotating knife body along the second elongated hole; and a buffer member, provided between the mounting frame and the film guiding roller, for realizing elastic abutment between the rotating knife body and the part of the coating film on the film guiding roller.

[0016] 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 at the easy-tear opening.

[0017] The plastic sealing packaging equipment provided by the embodiment of the utility model is that when the avoidance part faces the part of the coating film on the film guide roller, the avoidance part is spaced apart from the part of the coating film on the film guide roller. At this time, the coating film can be smoothly conveyed through the avoidance part and the film guide roller without being interfered by the rotating knife body; when the driving unit drives the rotating knife body to rotate a set angle along its unidirectional rotation direction and makes the rotating matching part face the part of the coating film on the film guide roller, the rotating matching part abuts against the part of the coating film on the film guide roller, then the coating film drives the rotating matching part to rotate along the unidirectional rotation direction of the rotating knife body, and the cutting part abuts against the part of the coating film on the film guide roller to form a film. To make an easy-tear opening, the rotating matching part abuts against the part of the coating film on the film guide roller, and the coating film is transmitted, which drives the rotating matching part to rotate along the unidirectional rotation direction of the rotating blade body, and the film guide roller also rotates. When the cut portion faces the film guide roller, the cut portion abuts against the part of the coating film on the film guide roller, and the easy-tear opening is made at the position where the easy-tear opening is needed on the coating film. Since the linear speed of the position where the cut portion contacts the coating film is the same, the cut portion will not tear the coating film, and the effect of making the easy-tear opening is better. As the rotating matching part rotates, when the avoidance part rotates to the part on the film guide roller facing the coating film, a cycle of making the easy-tear opening is completed. The plastic sealing packaging equipment has low manufacturing cost and good effect of making the easy-tear opening.

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

[0021] Figure 2 for Figure 1 A schematic diagram of the three-dimensional structure of the cutting device after the second mounting seat is removed;

[0022] Figure 3 for Figure 2 The enlarged structural diagram of the A part of the incision device shown, the locking mechanism is in the first position;

[0023] Figure 4 for Figure 3 A schematic diagram of the structure in another state of the structure shown, with the locking mechanism in a third position;

[0024] Figure 5 for Figure 3 A schematic diagram of the structure in another state of the structure shown, with the locking mechanism in the second position;

[0025] Figure 6 for Figure 1 A partial schematic diagram of the exploded structure of the incision device shown;

[0026] Figure 7 A schematic diagram of a three-dimensional structure of a plastic packaging device provided in some embodiments from one perspective;

[0027] Figure 8 for Figure 7 A three-dimensional structural schematic diagram of the plastic packaging equipment from another perspective;

[0028] Fig. 9 for Figure 8 The three-dimensional structural schematic diagram of the plastic packaging equipment after removing the covering film is shown.

[0029] The corresponding relationship between the reference numerals and the component names is as follows:

[0030] 10 cutting device, 100 cutting module, 110 mounting seat, 120 driving mechanism, 121 main body, 122 reciprocating moving member, 1221 hinge shaft, 130 transmission mechanism, 131 first long hole, 132 locking matching part, 133 holding rib, 140 locking mechanism, 141 first hinge part, 142 second hinge part, 143 locking part, 150 rotating blade, 151 avoiding part, 152 rotating matching part, 153 cutting part, 154 first circumferential surface, 155 second Second circumferential surface, 156 knife shaft, 160 connecting rod, 170 second film guide roller, 180 second mounting seat, 200 film guide roller, 300 first return spring, 400 second return spring, 500 one-way bearing, 600 buffer mechanism, 700 mounting frame, 710 first connecting piece, 720 second connecting piece, 730 second long hole, 740 adjusting beam, 800 buffer spring, 910 frame, 920 film supply device, 921 coating film, 930 patch device, 940 folding device. DETAILED DESCRIPTION

[0031] 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.

[0032] The plastic sealing packaging equipment provided by the embodiment of the utility model includes a frame 910, a film supply device 920, a cutting device 10 and a rotatably mounted film guide roller 200, all of which are arranged on the frame 910; the cutting device 10 includes a cutting module 100, the cutting module 100 includes a mounting seat 110, a driving unit and a rotating knife body 150, the driving unit is arranged on the mounting seat 110, the rotating knife body 150 can be unidirectionally mounted on the driving unit, and is configured to be used in conjunction with the film guide roller 200, the circumferential surface of the rotating knife body 150 is provided with an avoidance portion 151, a rotational matching portion 152 and a cutting portion 153, the avoidance portion 151 and the rotational matching portion 152 are sequentially arranged in the circumferential direction of the rotating knife body 150, the cutting portion 153 and the rotational matching portion 152 correspond in the axial position of the rotating knife body 150, and the film supply device 920 is provided with a film supply device 910, and the film supply device 920 is provided with a film supply device 100, and the film supply device 920 is provided with a film supply device 100, and the film supply device 10 ... 20 is configured to supply the coating film 921 between the rotating blade body 150 and the film guiding roller 200; when the avoidance portion 151 is directed toward the portion of the coating film 921 on the film guiding roller 200, the avoidance portion 151 is spaced apart from the portion of the coating film 921 on the film guiding roller 200; when the driving unit drives the rotating blade body 150 to rotate along its unidirectional rotation direction at a set angle and makes the rotational matching portion 152 directed toward the portion of the coating film 921 on the film guiding roller 200, the rotational matching portion 152 abuts against the portion of the coating film 921 on the film guiding roller 200, and the coating film 921 drives the rotational matching portion 152 to rotate along the unidirectional rotation direction of the rotating blade body 150, and abuts against the portion of the coating film 921 on the film guiding roller 200 through the incision portion 153 to produce an easy-to-tear opening.

[0033] The cutting device 10 of the plastic sealing packaging equipment can be controlled by only one driving unit, and the manufacturing cost is lower.

[0034] When the avoidance portion 151 faces the portion of the coating film 921 on the film guide roller 200, the avoidance portion 151 is spaced apart from the portion of the coating film 921 on the film guide roller 200. At this time, the coating film 921 can be smoothly transported between the avoidance portion 151 and the film guide roller 200 without being interfered by the rotating blade body 150. The driving unit drives the rotating blade body 150 to rotate along its unidirectional rotation direction at a set angle, so that the rotating matching portion 152 faces the portion of the coating film 921 on the film guide roller 200. When the rotating matching part 152 abuts against the part of the coating film 921 on the film guide roller 200, the coating film 921 drives the rotating matching part 152 to rotate along the unidirectional rotation direction of the rotating blade body 150, and abuts against the part of the coating film 921 on the film guide roller 200 through the cutout part 153 to produce an easy-tear opening, that is, the rotating matching part 152 abuts against the part of the coating film 921 on the film guide roller 200, and the coating film 921 is The transmission will drive the rotating matching part 152 to rotate along the unidirectional rotation direction of the rotating blade body 150, and the film guide roller 200 will also rotate (it can be that the coating film 921 drives the film guide roller 200 to rotate; or it can be that the driving motor drives the film guide roller 200 to rotate, etc.). When the cutout part 153 faces the part of the coating film 921 on the film guide roller 200, the cutout part 153 abuts against the part of the coating film 921 on the film guide roller 200. An easy-tear opening is made on the portion on the film guiding roller 200 (that is, the position on the coating film 921 where an easy-tear opening needs to be made). Since the linear velocity of the position where the cutout portion 143 contacts the coating film 921 is the same, the cutout portion 143 will not tear the coating film 921, and the effect of making the easy-tear opening is better. As the rotating matching portion 152 rotates, when the avoidance portion 151 rotates to the portion on the film guiding roller 200 facing the coating film 921, a cycle of making the easy-tear opening is completed.

[0035] In some exemplary embodiments, the driving unit may be a motor. The rotating blade body 150 has a blade shaft 156 , and the blade shaft 156 is rotatably mounted on the rotating shaft of the motor via a one-way bearing 500 .

[0036] In some other exemplary embodiments, Figures 1 to 6 As shown, the driving unit includes a driving mechanism 120, a transmission mechanism 130 and a locking mechanism 140. The driving mechanism 120 is fixed to the mounting seat 110. The transmission mechanism 130 and the locking mechanism 140 are both movably mounted on the mounting seat 110 and cooperate with the driving mechanism 120. The rotating blade body 150 can be unidirectionally mounted on the transmission mechanism 130, and the locking mechanism 140 is locked or unlocked with the transmission mechanism 130.

[0037] The driving mechanism 120 is in the first state, the locking mechanism 140 is in the first position and locked with the transmission mechanism 130, the avoidance portion 151 faces the portion of the coating film 921 on the film guide roller 200 and is spaced from the portion of the coating film 921 on the film guide roller 200, so that the transported coating film 921 can pass smoothly through the space;

[0038] The driving mechanism 120 changes from the first state to the second state. The driving mechanism 120 first drives the locking mechanism 140 to move from the first position to the third position and unlocks the transmission mechanism 130. The driving mechanism 120 then drives the transmission mechanism 130 and the rotating blade body 150 to swing along the unidirectional rotation direction of the rotating blade body 150 to set an angle, so that the rotating matching part 152 faces the part of the coating film 921 on the film guide roller 200 and abuts against the part of the coating film 921 on the film guide roller 200. When the cutting part 153 faces the part of the coating film 921 on the film guide roller 200, it also abuts against the part of the coating film 921 on the film guide roller 200. In this way, the cutting part 153 can make an easy-to-tear opening in the part of the coating film 921 on the film guide roller 200. Among them, the cutting module 100 is located on one side of the film guide roller 200.

[0039] When the driving mechanism 120 is in the first state, Figure 3 As shown, the locking mechanism 140 is located in the first position and locked with the transmission mechanism 130, the avoidance portion 151 faces the portion of the coating film 921 on the film guide roller 200 and is spaced from the portion of the coating film 921 on the film guide roller 200. At this time, the coating film 921 can be smoothly transported between the avoidance portion 151 and the film guide roller 200 without being interfered by the rotating blade 150; when the driving mechanism 120 changes from the first state to the second state, as shown in FIG. Figure 4 As shown, the driving mechanism 120 first drives the locking mechanism 140 to move from the first position to the third position and unlocks the transmission mechanism 130. Figure 5As shown, the driving mechanism 120 then drives the transmission mechanism 130 and the rotating blade body 150 to swing together to a set angle. At this time, the swinging direction of the rotating blade body 150 is the same as the unidirectional rotation direction of the rotating blade body 150, so that the rotating matching part 152 is directed toward the film guide roller 200 and abuts against the film guide roller 200, that is, the rotating matching part 152 abuts against the part of the coating film 921 located on the film guide roller 200, and the coating film 921 is transmitted, which will drive the rotating matching part 152 to rotate along the unidirectional rotation direction of the rotating blade body 150, and the film guide roller 200 also rotates (it can be that the coating film 921 drives the film guide roller 200 to rotate; or it can be that the driving motor drives the film guide roller 200 to rotate, etc.), at the incision When the portion 153 is toward the portion of the coating film 921 on the film guiding roller 200, the cut portion 153 abuts against the portion of the coating film 921 on the film guiding roller 200 and an easy-to-tear opening is made in the portion of the coating film 921 on the film guiding roller 200 (that is, the position on the coating film 921 where an easy-to-tear opening needs to be made). Since the linear speed of the position where the cut portion 143 contacts the coating film 921 is the same, the cut portion 143 will not tear the coating film 921, and the effect of making the easy-to-tear opening is better. When the avoidance portion 151 rotates to face the portion of the coating film 921 on the film guiding roller 200, the driving mechanism 120 resets from the second state to the first state, and at this time, one cycle of the action of making the easy-to-tear opening is completed.

[0040] It can be, for example Figures 3 to 6 As shown, the rotating cutter body 150 is configured as a hob, the avoidance portion 151 is configured as an arc-shaped notch, the rotational matching portion 152 is configured as an arc surface, and the cutout portion 153 is configured as an open annular cutout or a closed annular cutout. The circumferential surface of the rotating cutter body 150 includes a first circumferential surface 154 and a second circumferential surface 155 sequentially arranged along the axial direction, the diameter of the first circumferential surface 154 is greater than the diameter of the second circumferential surface 155, the avoidance portion 151 and the rotational matching portion 152 are located on the first circumferential surface 154, the cutout portion 153 is located on the second circumferential surface 155, and the end face of the cutout portion 153 is coplanar with the rotational matching portion 152. Of course, it is also possible that the cutout portion is directly arranged on the rotational matching portion (not shown in this scheme figure). The above can all 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 belong to the protection scope of the present application.

[0041] In some examples, such as Figures 3 to 6As shown, the driving mechanism 120 includes a main body 121 and a reciprocating member 122 . The main body 121 is connected to the reciprocating member 122 . The main body 121 is used to drive the reciprocating member 122 to reciprocate. Among them, one of the reciprocating moving part 122 and the transmission mechanism 130 has a hinge shaft 1221, and the other has a first elongated hole 131. The hinge shaft 1221 is rotatably arranged in the first elongated hole 131 and can move in the first elongated hole 131, so that when the driving mechanism 120 changes from the first state to the second state, the locking mechanism 140 is first driven to move from the first position to the third position and unlocked with the transmission mechanism 130, and then the transmission mechanism 130 and the rotating knife body 150 are driven together to swing along the unidirectional rotation direction of the rotating knife body 150 to set an angle, so that the rotating matching part 152 is toward the film guide roller 200 (that is, the rotating matching part 152 is toward the part of the coating film 921 on the film guide roller 200) and abuts against the part of the coating film 921 on the film guide roller 200.

[0042] That is, when the locking mechanism 140 is driven to move from the first position to the third position (the unlocking process of the locking mechanism 140 and the transmission mechanism 130), as Figure 4 As shown, the hinge shaft 1221 moves in the first elongated hole 131 and moves to the first end of the first elongated hole 131. During this process, the transmission mechanism 130 and the rotating blade body 150 do not swing. Then, as shown in FIG. Figure 5 As shown, under the squeezing thrust of the first end of the first elongated hole 131 and the hinge shaft 1221 , the transmission mechanism 130 and the rotating blade body 150 are swung together to a set angle along the unidirectional swinging direction of the rotating blade body 150 .

[0043] Furthermore, if Figures 3 to 6As shown, the locking mechanism 140 has a first hinged portion 141, a second hinged portion 142 and a locking portion 143, the transmission mechanism 130 has a locking matching portion 132, the first hinged portion 141 is hingedly connected with the reciprocating member 122 through a connecting rod 160 (or is hingedly connected with a hinge shaft and a third elongated hole in a rotatable and movable matching manner, etc.), and the second hinged portion 142 is hingedly connected with the mounting seat 110; the driving mechanism 120 is in the first state, the reciprocating member 122 is in the fourth position, and the locking portion 143 is matched with the locking matching portion 132 to be locked; The driving mechanism 120 changes from the first state to the second state, and the reciprocating member 122 moves from the fourth position to the fifth position. The driving mechanism 120 first drives the locking mechanism 140 to swing from the first position to the third position, so that the locking portion 143 and the locking matching portion 132 are separated and unlocked, and then drives the transmission mechanism 130 and the rotating blade body 150 to swing together to a set angle. At the same time, the driving mechanism 120 also drives the locking mechanism 140 to continue to swing from the third position to the second position to keep the locking portion 143 and the locking matching portion 132 unlocked; wherein, the third position is located between the first position and the second position.

[0044] like Figures 3 to 6 As shown, for the technical solution that the reciprocating member 122 has a hinge shaft 1221, and the transmission mechanism 130 has a first elongated hole 131, the first end of the first elongated hole 131 is far away from the locking mechanism 140, and the second end of the first elongated hole 131 is close to the locking mechanism 140. At this time, when the locking mechanism 140 is driven to move from the first position to the third position (unlocking process of the locking mechanism 140 and the transmission mechanism 130), as shown in FIG. Figure 4 As shown, the hinge shaft 1221 moves from the second end of the first elongated hole 131 to the first end of the first elongated hole 131 in the first elongated hole 131, and the transmission mechanism 130 and the rotating blade body 150 do not swing during this process; then, as shown in FIG. Figure 5 As shown, under the squeezing thrust of the first end of the first elongated hole 131 and the hinge shaft 1221, the transmission mechanism 130 and the rotating blade body 150 are swung together along the unidirectional swinging direction of the rotating blade body 150 to a set angle, and at the same time, the locking mechanism 140 continues to swing from the third position to the second position to keep the locking portion 143 unlocked from the locking mating portion 132.

[0045] Regarding the technical solution that the transmission mechanism 130 has a hinge shaft 1221, the reciprocating moving member 122 has a first elongated hole 131, the first end of the first elongated hole 131 is adjacent to the locking mechanism 140, and the second end of the first elongated hole 131 is away from the locking mechanism 140 (this solution is not shown in the figure). At this time, when the locking mechanism 140 is driven to move from the first position to the third position (the unlocking process of the locking mechanism 140 and the transmission mechanism 130), the first elongated hole 131 moves with the reciprocating moving member 122, so that the hinge shaft 1221 moves relatively from the second end of the first elongated hole 131 to the first end of the first elongated hole 131. During this process, the transmission mechanism 130 and the rotating blade body 150 do not swing; then, under the extrusion thrust of the first end of the first elongated hole 131 and the hinge shaft 1221, the transmission mechanism 130 and the rotating blade body 150 swing together to set the angle along the unidirectional swinging direction of the rotating blade body 150, and the locking mechanism 140 continues to swing from the third position to the second position to keep the locking portion 143 and the locking matching portion 132 unlocked.

[0046] Furthermore, if Figures 3 to 6 As shown, one of the locking portion 143 and the locking matching portion 132 is a convex locking tongue, and the other is a concave locking groove. The locking tongue is located in the locking groove to lock, and the locking tongue is located outside the locking groove to unlock.

[0047] The locking part may be configured as a locking tongue, and the locking matching part may be configured as a locking groove; or Figures 3 to 6 As shown, the locking mating portion 132 is configured as a locking tongue, the locking portion 143 is configured as a locking groove, etc.; all of 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.

[0048] Furthermore, if Figures 3 to 6 As shown, the transmission mechanism 130 and the locking mechanism 140 are both located between the driving mechanism 120 and the film guide roller 200, the second hinged portion 142 is located between the first hinged portion 141 and the locking portion 143, and the rotating blade 150 is located on the side of the transmission mechanism 130 that is away from the mounting seat 110. Figures 3 to 5As shown, the reciprocating member 122 is equipped with a first return spring 300, and the first return spring 300 is used to assist the reciprocating member 122 to move from the fifth position to the fourth position for rapid reset. During this process, the reciprocating member 122 will drive the transmission mechanism 130 to swing in the opposite direction of the rotatable direction of the rotating knife body 150 to reset (at this time, the rotating knife body 150 cannot rotate with the transmission mechanism 130, and the avoidance portion 151 is still kept facing the film guide rod 200 and spaced from the portion of the coating film 921 located on the film guide rod 200); the locking mechanism 140 is equipped with a second return spring 400, and the second return spring 400 is used to assist the locking mechanism 140 to swing from the second position to the first position for reset, so that the locking portion 143 and the locking matching portion 132 are quickly locked.

[0049] In some examples, such as Figures 3 to 6 As shown, the rotary blade body 150 has a blade shaft 156, and the blade shaft 156 is rotatably mounted on the transmission mechanism 130 through a one-way bearing 500. It can be that the transmission mechanism 130 is provided with an axial hole, the blade shaft 156 is arranged in the axial hole, and the one-way bearing 500 is located between the blade shaft 156 and the hole wall of the axial hole. This solution has a simple structure and is easy to manufacture.

[0050] The avoidance portion 151, the rotational matching portion 152 and the cutout portion 153 may comprise a group, and the rotary cutter body 150 rotates 360 degrees in one cycle (not shown in the diagram of this scheme); or the avoidance portion 151, the rotational matching portion 152 and the cutout portion 153 may comprise a plurality of groups sequentially arranged in the circumferential direction of the rotary cutter body 150, and the plurality of groups may comprise two groups, three groups or four groups, etc. Figures 3 to 6 As shown, for two groups, the knife body 150 rotates 180 degrees in one cycle; for three groups, the knife body 150 rotates 120 degrees in one cycle (not shown in this scheme diagram); for four groups, the knife body 150 rotates 90 degrees in one cycle (not shown in this scheme diagram); the above can all 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.

[0051] In some examples, such as Figures 3 to 6 As shown, the incision device 10 further includes: a buffer mechanism 600, a transmission mechanism 130, a locking mechanism 140 and a reciprocating member 122 having a resisting portion, and when the reciprocating member 122 is reset from the fifth position to the fourth position, as shown in FIG. Figure 3 As shown, the abutting portion abuts against the buffer mechanism 600 to ensure that the reciprocating member 122 is accurately positioned at the fourth position. At this time, the driving mechanism 120 can be set as an electromagnet driving mechanism 120, such as Figures 3 to 5As shown, when the electromagnet drive mechanism 120 is powered on, the reciprocating member 122 moves from the fourth position to the fifth position, and the reciprocating member 122 is retracted under the electromagnetic driving force. When the electromagnet drive mechanism 120 is powered off, the reciprocating member 122 is retracted from the fifth position to the fourth position under the spring restoring force (of the first return spring 300 and the second return spring 400) and extends out. In this process, the buffer mechanism 600 can better ensure that the electromagnet drive mechanism 120 can retract the reciprocating member 122 in time when powered on. Wherein, the buffer mechanism 600 can be set to a spring buffer mechanism or a rubber buffer mechanism, etc., which can achieve the purpose of this application, and its purpose does not deviate from the design idea of ​​the utility model, and will not be repeated here, and should all belong to the protection scope of this application.

[0052] Of course, it is also possible that when the electromagnet drive mechanism 120 is powered on, the reciprocating member 122 moves from the fourth position to the fifth position, at which time the reciprocating member 122 is extended under the action of the electromagnetic driving force, and when the electromagnet drive mechanism 120 is powered off, the reciprocating member 122 is reset from the fifth position to the fourth position and retracted under the action of the spring restoring force (of the first return spring 300 and the second return spring 400). In this process, the buffer mechanism 600 can better ensure that the electromagnet drive mechanism 120 can extend the reciprocating member 122 in time when powered on (not shown in the diagram of this scheme). This scheme can also 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 also fall within the protection scope of the present application.

[0053] Of course, the drive mechanism 120 can also be set as a gear rack motor drive mechanism, a screw nut motor drive mechanism or a telescopic cylinder drive mechanism, etc., all of which can 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. They should all fall within the protection scope of this application.

[0054] In one embodiment, if Figures 3 to 6 As shown, the abutting portion is a abutting rib 133 disposed on the transmission mechanism 130 .

[0055] In some examples, such as Figure 1 and Figure 2As shown, the incision device 10 also includes: a mounting frame 700, the mounting frame 700 is provided with a second elongated hole 730, and the mounting seat 110 is provided on the mounting frame 700; a film guide roller 200, the incision module 100 is located on one side of the film guide roller 200, and the film guide roller 200 is rotatably provided in the second elongated hole 730 and can move toward and away from the rotating blade body 150 along the second elongated hole 730; and a buffer, the buffer is provided between the mounting frame 700 and the film guide roller 200, and the buffer is used to realize that the abutment between the rotating blade body 150 and the film guide roller 200 is elastic abutment rather than rigid abutment (that is, the buffer is used to realize that the abutment between the rotating blade body 150 and the part of the coating film 921 on the film guide roller 200 is elastic abutment rather than rigid abutment), which can effectively extend the service life of the rotating blade body 150 and the film guide roller 200. The buffer is set as a buffer spring 800 or a buffer pad (buffer pad such as a rubber pad or a silicone pad, etc.) and other structures.

[0056] Furthermore, if Figure 1 and Figure 2 As shown, the mounting frame 700 includes: a first connecting member 710 and a second connecting member 720 arranged opposite to each other, each of the first connecting member 710 and the second connecting member 720 being provided with a second elongated hole 730, and a film-guiding roller 200 being rotatably and movably arranged at the second elongated hole 730 of the first connecting member 710 and the second elongated hole 730 of the second connecting member 720 through both ends; an adjusting beam 740, the adjusting beam 740 being located between the first connecting member 710 and the second connecting member 720 and connecting the first connecting member 710 and the second connecting member 720, the film-guiding roller 200 being located on one side of the adjusting beam 740 and being arranged opposite to the adjusting beam 740, and the mounting seat 110 being adjustably fixed to the adjusting beam 740, and for different coating films 921 (different coating films 921 require different positions of easy-tear openings in the width direction), the easy-tear openings can be made by adjusting the fixed position of the mounting seat 110 on the adjusting beam 740.

[0057] Of course, an adjustment mechanism can also be provided to move the cutting module 100 toward the film guide roller 200 or away from the film guide roller 200 (not shown in this scheme diagram) to adjust the interval between the rotating blade body 150 and the film guide roller 200, which can also achieve the purpose of the present application. Its purpose does not deviate from the design concept of the present invention and will not be repeated here, and it should also fall within the scope of protection of the present application.

[0058] In one embodiment, if Figure 1 and Figure 2As shown, a buffer spring 800 is provided between the film guide roller 200 and the first connecting member 710 and between the film guide roller 200 and the second connecting member 720. The buffer spring 800 may be located on the side of the film guide roller 200 facing away from the coating film 921 (e.g., the buffer spring 800 is a compressed coil spring, and of course, the buffer spring 800 may also be replaced by a buffer pad); or the buffer spring 800 may be located on the side of the film guide roller 200 facing the coating film 921 (e.g., the buffer spring 800 is a tensioned coil spring); 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 also belong to the protection scope of the present application.

[0059] Among them, Figure 1 and Figure 2 As shown, a second film guide roller 170 is also installed between the first connecting member 710 and the second connecting member 720, and the second film guide roller 170 is located on one side of the film guide roller 200. A second mounting seat 180 is also provided between the rotating blade body 150 and the transmission mechanism 130, and the second mounting seat 180 is spaced apart from and fixedly connected to the first mounting seat 110, and the blade shaft 156 is rotatably penetrated through the second mounting seat 180. Among them, the second mounting seat 180 and the first mounting seat 110 are both configured as mounting plates, and an annular wall can also be added between the two mounting plates to seal the components between the two mounting plates.

[0060] In some embodiments, Figures 7 to 9 As shown, the plastic sealing packaging equipment also includes a patch device 930, a folding device 940 and a sealing and cutting device. The film supply device 920, the cutting device 10, the patch device 930, the folding device 940 and the sealing and cutting device are all arranged on the frame 910. The film supply device 920 is configured to supply the coating film 921. The rotating knife body 150 is located on the side of the coating film 921 that is away from the film guide roller 200. The patch device 930 is located downstream of the cutting device 10 and is arranged to stick a tear patch at the easy-tear edge. The folding device 940 is located downstream of the patch device 930 and is configured to fold the traveling coating film 921 in half. At this time, the tear patch is located on the inner side of the folded coating film 921. The folded covering film 921 enters the sealing and cutting device, and after being turned inside out by the eversion mechanism of the sealing and cutting device, the tear patch is exposed on the outside of the covering film 921 again, and then the sealing and cutting mechanism of the sealing and cutting device plastic-seals the turned inside out covering film 921 on the product. After the covering film 921 is finally covered on the product, the tear patch is on the exposed surface of the covering film 921, and the covering film 921 on the product can be easily torn off by the tear patch.

[0061] To sum up, in the plastic sealing packaging equipment provided by the embodiment of the utility model, when the avoidance portion faces the portion of the coating film on the film guide roller, the avoidance portion is spaced apart from the portion of the coating film on the film guide roller, and the coating film can be smoothly conveyed through between the avoidance portion and the film guide roller without being interfered with by the rotating knife body; when the driving unit drives the rotating knife body to rotate along its unidirectional rotation direction at a set angle and makes the rotating matching portion face the portion of the coating film on the film guide roller, the rotating matching portion abuts against the portion of the coating film on the film guide roller, and the coating film drives the rotating matching portion to rotate along the unidirectional rotation direction of the rotating knife body, and through the incision portion and the coating film on the film guide roller. The parts of the coating film are in contact with each other to produce an easy-tear opening, that is, the rotating matching part is in contact with the part of the coating film located on the film guide roller, and the coating film is transmitted, which will drive the rotating matching part to rotate along the unidirectional rotation direction of the rotating knife body, and the film guide roller also rotates. When the incision part faces the film guide roller, the incision part is in contact with the part of the coating film located on the film guide roller, and the easy-tear opening is produced at the position where the easy-tear opening is required on the coating film. Since the linear speed of the position where the incision part contacts the coating film is the same, the incision part will not tear the coating film, and the effect of producing the easy-tear opening is better; as the rotating matching part rotates, when the avoidance part rotates to face the film guide roller, a cycle of the action of producing the easy-tear opening is completed. The plastic sealing packaging equipment has low manufacturing cost and good effect of producing the easy-tear opening.

[0062] 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-shaped structure" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the structure referred to has a specific position, is constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention.

[0063] 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.

[0064] 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, a cutting device and a rotatably mounted film guide roller, all of which are arranged on the frame; the cutting device comprises a cutting module, the cutting module comprises a mounting seat, a driving unit and a rotating knife body, the driving unit is arranged on the mounting seat, the rotating knife body can be unidirectionally mounted on the driving unit, and is arranged to be used in conjunction with the film guide roller, the circumferential surface of the rotating knife body is provided with an avoidance portion, a rotation matching portion and a cutting portion, the avoidance portion and the rotation matching portion are arranged in sequence in the circumferential direction of the rotating knife body, the cutting portion and the rotation matching portion correspond to the axial positions of the rotating knife body, and the film supply device is arranged to supply a coating film between the rotating knife body and the film guide roller; When the avoidance portion faces the portion of the coating film on the film guide roller, the avoidance portion is spaced apart from the portion of the coating film on the film guide roller; When the driving unit drives the rotating knife body to rotate along its unidirectional rotation direction by a set angle and makes the rotating fitting part face the part of the coating film on the film guide roller, the rotating fitting part abuts against the part of the coating film on the film guide roller, and the coating film drives the rotating fitting part to rotate along the unidirectional rotation direction of the rotating knife body, and an easy-to-tear opening is produced by the abutment between the cut part and the part of the coating film on the film guide roller.

2. The plastic packaging equipment according to claim 1, characterized in that: The driving unit comprises a driving mechanism, a transmission mechanism and a locking mechanism, wherein the driving mechanism is fixedly mounted on the mounting seat, the transmission mechanism and the locking mechanism are both movably mounted on the mounting seat and are matched with the driving mechanism, the rotating cutter body can be unidirectionally mounted on the transmission mechanism, and the locking mechanism is locked or unlocked with the transmission mechanism; The driving mechanism is in a first state, the locking mechanism is in a first position and locked with the transmission mechanism, the avoidance portion faces the portion of the coating film on the film guide roller, and is spaced apart from the portion of the coating film on the film guide roller; The driving mechanism changes from the first state to the second state. The driving mechanism first drives the locking mechanism to move from the first position to the third position to unlock the transmission mechanism. The driving mechanism then drives the transmission mechanism and the rotating knife body to swing along the unidirectional rotation direction of the rotating knife body to the set angle, so that the rotating matching part abuts against the part of the coating film on the film guiding roller.

3. The plastic packaging equipment according to claim 2, characterized in that: The driving mechanism includes a main body and a reciprocating member, the main body is connected to the reciprocating member, one of the reciprocating member and the transmission mechanism has a hinge shaft, and the other has a first elongated hole, the hinge shaft is rotatably disposed in the first elongated hole and can move in the first elongated hole, so that when the driving mechanism changes from the first state to the second state, the locking mechanism is first driven to move from the first position to the third position, and then the transmission mechanism and the rotating cutter body are driven to swing together to a set angle.

4. The plastic packaging equipment according to claim 3, characterized in that: The locking mechanism comprises a first hinged portion, a second hinged portion and a locking portion, the transmission mechanism comprises a locking matching portion, the first hinged portion is transmission-connected with the reciprocating moving member, and the second hinged portion is hinge-connected with the mounting seat; The driving mechanism is in the first state, the reciprocating member is in the fourth position, and the locking portion and the locking matching portion are matched and locked; The driving mechanism changes from the first state to the second state, the reciprocating member moves from the fourth position to the fifth position, and the locking mechanism is first driven to swing from the first position to the third position so that the locking portion and the locking matching portion are separated and unlocked, and then the transmission mechanism and the rotating cutter body are driven to swing together to a set angle and the locking mechanism is driven to swing from the third position to the second position to keep the locking portion and the locking matching portion unlocked, and the third position is located between the first position and the second position.

5. The plastic packaging equipment according to claim 4, characterized in that: One of the locking portion and the locking matching portion is a convex locking tongue, and the other is a concave locking groove. The locking tongue is located in the locking groove to lock, and the locking tongue is located outside the locking groove to unlock.

6. The plastic sealing packaging equipment according to claim 4, characterized in that: The transmission mechanism and the locking mechanism are both located between the driving mechanism and the film guiding roller, the second hinged portion is located between the first hinged portion and the locking portion, the rotating knife body is located on the side of the transmission mechanism facing away from the mounting seat, the reciprocating member is equipped with a first return spring, and the locking mechanism is equipped with a second return spring.

7. The plastic packaging equipment according to claim 2, characterized in that: The driving mechanism comprises a main body and a reciprocating member, wherein the main body is connected to the reciprocating member, and the incision device further comprises: The buffer mechanism, one of the transmission mechanism, the locking mechanism and the reciprocating moving member is provided with a butting portion, and when the driving mechanism is reset from the second state to the first state, the butting portion abuts against the buffer mechanism.

8. The plastic packaging equipment according to claim 1, characterized in that: The rotating blade body has a blade shaft, and the blade shaft is rotatably mounted on the driving unit through a one-way bearing; The avoidance portion, the rotational matching portion and the cutout portion include one group or a plurality of groups sequentially arranged in the circumferential direction of the rotating blade body.

9. The plastic sealing packaging equipment according to any one of claims 1 to 8, characterized in that: The incision device also includes: A mounting frame, provided with a second elongated hole, and the mounting seat is arranged on the mounting frame; The film guide roller, the cutting module is located on one side of the film guide roller, the film guide roller is rotatably arranged in the second elongated hole, and can move toward and away from the rotating blade body along the second elongated hole; and A buffer member is provided between the mounting frame and the film guiding roller, and is used to realize elastic abutment between the rotating blade body and the portion of the coating film on the film guiding roller.

10. The plastic sealing packaging equipment according to any one of claims 1 to 8, 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 at the easy-tear opening.

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