Packaging film sealing and cutting structure and packaging machine comprising same

Abstract

The utility model relates to the technical field of packaging equipment, and discloses a packaging film sealing and cutting structure and a packaging machine comprising the packaging film sealing and cutting structure. A packaging film sealing and cutting structure comprises a rack. A sealing and cutting table and a film pressing block are arranged on the rack, and the film pressing block is located above the sealing and cutting table and can be close to or away from the sealing and cutting table; the sealing and cutting device further comprises a heating wire and an elastic tensioning structure, the heating wire is arranged on the sealing and cutting table or the film pressing block, at least one end of the heating wire is connected with the elastic tensioning structure, and the elastic tensioning structure is used for applying pulling force to the heating wire so that the heating wire can be kept tight. The device has the beneficial effects that the probability that the heating wire touches a packaging film before sealing and cutting is reduced, and the packaging quality and the packaging speed can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to packing equipment technical field especially a kind of packaging film seal cutting structure and the packaging machine comprising it. BACKGROUND

[0002] The prior art packaging film seal cutting mechanism includes a seal cutting table and a movable film pressing block above the seal cutting table. A heating wire is tightly wound around the seal cutting table. A box pushing device pushes the box to be packaged from one side of the seal cutting table to the other side. Then the film pressing block presses the upper film and the lower film of the packaging film together. The heating wire seals and cuts the upper film and the lower film.

[0003] However, the above mechanism has at least the following disadvantages: after each sealing and cutting, the heating wire may stick to the packaging film on the box due to the high residual temperature. As the box continues to move, the packaging film on the box may pull the heating wire to some extent. If the heating wire is pulled for many times, it may be elongated and no longer tight. When the subsequent box to be packaged is pushed, the heating wire may be scratched, the packaging film may be damaged, and the packaging quality and efficiency may be affected. SUMMARY

[0004] The main purpose of the utility model is to provide a packaging film seal cutting structure to solve at least one of the above problems in the prior art.

[0005] To achieve the above purpose, the utility model provides a packaging film seal cutting structure, which includes a rack. A seal cutting table and a film pressing block are arranged on the rack. The film pressing block is above the seal cutting table and can approach or move away from the seal cutting table. The structure further includes a heating wire and an elastic tensioning structure. The heating wire is arranged on the seal cutting table or the film pressing block. At least one end of the heating wire is connected to the elastic tensioning structure. The elastic tensioning structure is used to apply tension to the heating wire to keep it tight.

[0006] The packaging film seal cutting structure of the utility model has an elastic tensioning structure. If the heating wire is elongated after being pulled for many times, the elastic tensioning structure can adjust the tension of the heating wire by its elasticity to keep the heating wire tight. This reduces the probability of the heating wire touching the packaging film before sealing and cutting, which helps to improve the packaging quality and speed.

[0007] Preferably, the heating wire is arranged on the film pressing block. One end of the heating wire is arranged on the upper side of the film pressing block. The other end of the heating wire is arranged on the upper side of the film pressing block after passing through the two end faces and the lower side of the film pressing block. This further reduces the probability of the heating wire touching the packaging film before sealing and cutting, which improves the fault tolerance.

[0008] Preferably, two elastic tensioning structures are arranged on the upper side of the film pressing block, and the two ends of the heating wire are connected to the two elastic tensioning structures respectively, so that the heating wire can be timely tensioned when the heating wire is pulled and lengthened.

[0009] Preferably, the elastic tensioning structure comprises a mounting plate, a rotating plate, a mounting strip and a torsion spring, the mounting plate is fixed on the film pressing block, the mounting plate is provided with two oppositely arranged connecting plates, the two connecting plates are each provided with a through hole, the mounting strip is arranged in the through holes of the two connecting plates and can rotate in the through holes, the rotating plate is provided with two connecting rods at two ends, the two connecting rods are connected to the two ends of the mounting strip respectively, the torsion spring is sleeved on the mounting strip, one end of the torsion spring abuts against the connecting plate, and the other end of the torsion spring abuts against the mounting plate, and the end of the heating wire is connected to the rotating plate, so that the rotating plate extrudes the torsion spring to make the two end feet of the torsion spring close to each other, the elastic tensioning structure occupies a smaller space and has a larger strength, and the service life of the elastic tensioning structure is prolonged.

[0010] Preferably, the connecting position of the lower side and the end face of the film pressing block is provided with a first clamping groove, the connecting position of the upper side and the end face of the film pressing block is provided with a second clamping groove, the bottom surfaces of the first clamping groove and the second clamping groove extend in an arc shape, the bottom surface of the first clamping groove connects the lower side and the end face of the film pressing block, and the bottom surface of the second clamping groove connects the upper side and the end face of the film pressing block, so that the heating wire is protected and the bending part of the heating wire is not easy to break.

[0011] Preferably, the packaging machine further comprises a film pressing plate, the film pressing plate is arranged on one side of the film pressing block, the lower side of the film pressing plate protrudes from the lower side of the film pressing block, the film pressing block is provided with a guide structure capable of guiding the film pressing plate to move up and down, the film pressing plate is arranged on the guide structure, the guide structure is provided with an elastic reset structure, the upper end of the elastic reset structure is fixed to the guide structure, and the lower end of the elastic reset structure abuts against the film pressing plate, so that the film pressing plate contacts the packaging film before the heating wire when the film is cut and sealed, the heating wire does not contact the packaging film before the film is cut and sealed, and the cutting and sealing quality and efficiency are further improved.

[0012] Preferably, the two sides of the film pressing block are each provided with a film pressing plate, the guide structure comprises a guide plate and a guide column, the guide column is arranged on the upper side of the film pressing block, the guide plate is provided with a guide hole, the guide column is arranged in the guide hole, the two sides of the guide plate are connected to the two film pressing plates respectively, the elastic reset structure comprises a reset spring, the upper end of the guide column is provided with a limiting ring, and the reset spring is sleeved on the guide column, and the upper end and the lower end of the reset spring extrude the limiting ring and the guide plate respectively.

[0013] The utility model also provides a kind of packaging machine, including above packaging film cutting and sealing structure.

[0014] Preferably, the packaging machine further comprises a conveying table and a film feeding mechanism, the film feeding mechanism is used to convey the packaging film between the conveying table and the cutting and sealing table. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to the structure shown in these drawings without creative labor.

[0016] Figure 1 It is a front view of the packaging film sealing and cutting structure in the embodiment of the present application.

[0017] Figure 2 It is a structural schematic view of the pressing film block and each component arranged thereon in the embodiment of the present application.

[0018] Figure 3 It is a partial enlarged view of A in the embodiment of the present application. Figure 2

[0019] Figure 4 It is a structural schematic view of the torsion spring in the embodiment of the present application.

[0020] Figure 5 It is a structural schematic view of the mounting plate, rotating plate and rotating strip in the embodiment of the present application.

[0021] Figure 6 It is a structural schematic view of the pressing film block in the embodiment of the present application.

[0022] Figure 7 It is a structural schematic view of the packaging machine in the embodiment of the present application.

[0023] In the drawings: 1 - rack, 2 - sealing and cutting table, 3 - pressing film block, 31 - first clamping groove, 32 - second clamping groove, 4 - pressing film plate, 5 - guide structure, 51 - guide plate, 52 - guide column, 53 - limiting ring, 6 - elastic reset structure, 61 - reset spring, 7 - elastic tensioning structure, 71 - mounting plate, 711 - connecting plate, 712 - mounting strip, 72 - rotating plate, 721 - connecting rod, 73 - torsion spring, 731 - end foot, 8 - heating wire, 10 - packaging film, 101 - upper film, 102 - lower film, 20 - conveying table, 30 - film feeding mechanism.

[0024] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the drawings. DETAILED DESCRIPTION

[0025] ​The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present application.

[0026] It should be noted that if the embodiments of the present application involve directional indications, such as up, down, left, right, front, back, etc., the directional indications are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture, and if the specific posture changes, the directional indications will also change accordingly.

[0027] In addition, if the embodiments of the present application involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist and is not within the protection scope required by the present application.

[0028] As shown in Figures 1 to 7 A packaging film sealing and cutting structure includes a rack 1; the rack 1 is provided with a sealing and cutting table 2 and a film pressing block 3, the film pressing block 3 is located above the sealing and cutting table 2 and can be close to or away from the sealing and cutting table 2; further comprising a heating wire 8 and an elastic tensioning structure 7, the heating wire 8 is arranged on the sealing and cutting table 2 or the film pressing block 3, at least one end of the heating wire 8 is connected with the elastic tensioning structure 7, and the elastic tensioning structure 7 is used for applying tension to the heating wire 8 to keep it tight.

[0029] The packaging film sealing and cutting structure of the embodiment is provided with the elastic tensioning structure 7, if the heating wire 8 is stretched and lengthened after being sealed and cut for many times, the elastic tensioning structure 7 can adjust and tension the heating wire 8 by using the elasticity of the elastic tensioning structure 7, so that the heating wire 8 keeps in a tight state, and the probability that the heating wire 8 touches the packaging film 10 before sealing and cutting is reduced, which is beneficial to improve the packaging quality and packaging speed.

[0030] In the embodiment, the packaging film is a heat shrinkable film.

[0031] In some specific embodiments, reference Figure 2The heating wire 8 is arranged on the film pressing block 3, one end of the heating wire 8 is arranged on the upper side of the film pressing block 3, and the other end of the heating wire 8 is arranged on the upper side of the film pressing block 3 after passing around the two end faces and the lower side of the film pressing block 3.

[0032] Since the film pressing block 3 has been raised to a certain height away from the sealing and cutting table 2 when the packaging object is pushed onto the sealing and cutting table 2, even if the heating wire 8 is excessively protruded downward after being pulled, the heating wire 8 is not easy to touch the packaging film 10. Therefore, arranging the heating wire 8 on the film pressing block 3 is beneficial to further reduce the probability of the heating wire 8 touching the packaging film 10 before sealing and cutting, and improve the fault tolerance.

[0033] One end of the heating wire 8 is arranged on the upper side of the film pressing block 3, and the other end of the heating wire 8 is arranged on the upper side of the film pressing block 3 after passing around the two end faces and the lower side of the film pressing block 3. In this way, the heating wire 8 is more closely attached to the lower side of the film pressing block 3, and the sealing quality is guaranteed.

[0034] In some other embodiments, one end of the heating wire 8 is arranged on one end face of the film pressing block 3, and the other end of the heating wire 8 is arranged on the other end face of the film pressing block 3 after passing around the lower side of the film pressing block 3. In this way, the heating wire 8 is also closely attached to the lower side of the film pressing block 3.

[0035] In some other embodiments, one end of the heating wire 8 is arranged on one end face of the film pressing block 3, and the other end of the heating wire 8 is arranged on the upper side of the film pressing block 3 after passing around the lower side and the other end face of the film pressing block 3. In this way, the heating wire 8 is also closely attached to the lower side of the film pressing block 3.

[0036] In some specific embodiments, referring to Figure 2 The upper side of the film pressing block 3 is provided with two elastic tensioning structures 7, and the two ends of the heating wire 8 are respectively connected to the two elastic tensioning structures 7.

[0037] The two ends of the heating wire 8 are respectively connected to the two elastic tensioning structures 7, which is beneficial to timely tensioning when the heating wire 8 is pulled and elongated, and is also beneficial to relatively uniform elongation of each part of the heating wire 8, thereby prolonging the service life of the heating wire 8.

[0038] In some specific embodiments, referring to Figures 3 to 5The elastic tensioning structure 7 comprises a mounting plate 71, a rotating plate 72, a mounting strip 712 and a torsion spring 73. The mounting plate 71 is fixed on the film pressing block 3. Two connecting plates 711 are oppositely arranged on the mounting plate 71. The two connecting plates 711 are both provided with through holes. The mounting strip 712 is arranged in the through holes of the two connecting plates and can rotate in the through holes. The two ends of the rotating plate 72 are both provided with connecting rods 721. The two connecting rods 72 are respectively connected to the two ends of the mounting strip 712. The torsion spring 73 is sleeved on the mounting strip 712. One end foot 731 of the torsion spring 73 abuts against the connecting plate 711, and the other end foot 731 abuts against the mounting plate 71. The end of the heating wire 8 is connected to the rotating plate 72, so that the rotating plate 72 extrudes the torsion spring 73 to make the two end feet 731 of the torsion spring 73 close to each other.

[0039] The heating wire 8 applies a pulling force to the rotating plate 72, so that the rotating plate 72 extrudes the corresponding end foot 731, thereby reducing the angle between the two end feet 731 of the torsion spring 73 and making the torsion spring 73 in a state of storing energy. When the heating wire 8 needs to be tensioned and adjusted because it is too long, the torsion spring 73 releases energy appropriately, the angle between the two end feet 731 is increased, the rotating plate 72 is driven to rotate, and the heating wire 8 is tensioned. Using the torsion spring 73 as the elastic element in the elastic tensioning structure 7 makes the elastic tensioning structure 7 occupy less space and have greater strength, which is beneficial to the installation of the elastic tensioning structure 7 and prolongs the service life of the elastic tensioning structure 7.

[0040] In some other embodiments, the elastic tensioning structure 7 comprises a tension spring. The two ends of the tension spring are respectively connected to the upper side of the film pressing block 3 and the end of the heating wire 8. The heating wire 8 applies a pulling force to the tension spring, so that the tension spring is stretched and lengthened to store energy. When the heating wire 8 is pulled and lengthened, the tension spring is compressed to release energy and tension the heating wire 8.

[0041] In some specific embodiments, referring to Figure 6 The lower side of the film pressing block 3 is provided with a first clamping groove 31 at the connection with the end face. The upper side of the film pressing block 3 is provided with a second clamping groove 32 at the connection with the end face. The bottom surfaces of the first clamping groove 31 and the second clamping groove 32 are both arc-shaped. The bottom surface of the first clamping groove 31 connects the lower side and the end face of the film pressing block 3. The bottom surface of the second clamping groove 32 connects the upper side and the end face of the film pressing block 3.

[0042] The first clamping groove 31 and the second clamping groove 32 can prevent the heating wire 8 from being displaced during the working process, especially when the heating wire 8 is adhered to the packaging film 10 after cutting and is pulled. The arc-shaped bottom surfaces of the first clamping groove 31 and the second clamping groove 32 are beneficial to the protection of the heating wire 8, so that the bending part of the heating wire 8 is not easy to break.

[0043] In some specific embodiments, referring to Figure 1 , Figure 2 andFigure 7 The packaging film sealing and cutting structure further comprises a pressing film plate 4 arranged on one side of the pressing film block 3, the lower side of the pressing film plate 4 protrudes from the lower side of the pressing film block 3, the pressing film block 3 is provided with a guide structure 5 capable of guiding the pressing film plate 4 to move up and down, the pressing film plate 4 is arranged on the guide structure 5, the guide structure 5 is provided with an elastic reset structure 6, the upper end of the elastic reset structure 6 is fixed to the guide structure 5, and the lower end of the elastic reset structure 6 abuts against the pressing film plate 4. When sealing and cutting, the pressing film plate 4 contacts the packaging film 10 first than the heating wire 8.

[0044] The pressing film plate 4 is arranged to protect the heating wire 8 and ensure that the heating wire 8 does not touch the packaging film 10 before sealing and cutting, thereby further improving the sealing and cutting quality and efficiency.

[0045] When sealing and cutting, the pressing film block 3 moves downward, the pressing film plate 4 first presses the packaging film 10, so that the packaging film 10 maintains a distance from the pressing film block 3, after the pressing film plate 4 presses the upper film 101 and the lower film 102 of the packaging film 10 together onto the sealing and cutting table 2, the pressing film block 3 continues to descend, the pressing film plate 4 extrudes the elastic reset structure 6 to press the heating wire 8 on the pressing film block 3 to seal and cut the upper film 101 and the lower film 102. After sealing and cutting, the pressing film block 3 rises, the elastic reset structure 6 gradually stretches, and the pressing film plate 4 is reset.

[0046] In addition, the arrangement of the pressing film plate 4 can also pre-position the upper film 101 and the lower film 102 of the packaging film 10 before sealing and cutting, so that the accuracy is guaranteed or even improved during sealing and cutting.

[0047] Further, the packaging film sealing and cutting structure comprises only one pressing film plate 4 arranged on one side of the pressing film block 3 close to the film feeding mechanism 30.

[0048] In some specific embodiments, referring to Figure 2 Each side of the pressing film block 3 is provided with one pressing film plate 4, the guide structure 5 comprises a guide plate 51 and a guide column 52, the guide column 52 is arranged on the upper side of the pressing film block 3, the guide plate 51 is provided with a guide hole, the guide column 52 is arranged in the guide hole, the two sides of the guide plate 51 are respectively connected to the two pressing film plates 4, the elastic reset structure 6 comprises a reset spring 61, the upper end of the guide column 52 is provided with a limiting ring 53, the reset spring 61 is sleeved on the guide column 52, and the upper end and the lower end of the reset spring 61 respectively extrude the limiting ring 53 and the guide plate 51.

[0049] Specifically, the return spring 61 is a compression spring that can store energy when compressed. A pressure plate 4 is provided on each side of the pressure block 3 to further ensure that the heating wire 8 does not touch the packaging film 10 before sealing and cutting. Furthermore, its pre-positioning function is better; when the two pressure plates 4 press the upper film 101 and lower film 102 of the packaging film 10 tightly onto the sealing and cutting table 2, the upper film 101 and lower film 102 of the packaging film 10 are less likely to move relative to each other.

[0050] Furthermore, the limiting ring 53 is a nut, and the guide post 52 has an external thread that matches the nut near its upper end. This design facilitates the installation and removal of the limiting ring 53 from the guide post 52, and makes it easy to replace the return spring 61.

[0051] This embodiment also provides a packaging machine, see reference. Figure 7 This includes the aforementioned packaging film sealing structure.

[0052] In some specific embodiments, reference is made to Figure 7 The packaging machine also includes a conveyor table 20 and a film feeding mechanism 30, which is used to convey the packaging film 10 between the conveyor table 20 and the sealing and cutting table 2.

[0053] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A packaging film sealing and cutting structure, characterized in that: Includes a frame (1), on which a sealing and cutting table (2) and a pressing block (3) are provided. The pressing block (3) is located above the sealing and cutting table (2) and can be close to or away from the sealing and cutting table (2). It also includes a heating wire (8) and an elastic tensioning structure (7). The heating wire (8) is disposed on the sealing and cutting table (2) or the pressing block (3). At least one end of the heating wire (8) is connected to the elastic tensioning structure (7). The elastic tensioning structure (7) is used to apply tension to the heating wire (8) to keep it taut.

2. The packaging film sealing structure according to claim 1, characterized in that: The heating wire (8) is disposed on the pressure block (3). One end of the heating wire (8) is disposed on the upper side of the pressure block (3), and the other end of the heating wire (8) passes around the two end faces and the lower side of the pressure block (3) and is disposed on the upper side of the pressure block (3).

3. The packaging film sealing and cutting structure according to claim 2, characterized in that: The upper side of the pressure block (3) is provided with two elastic tensioning structures (7), and the two ends of the heating wire (8) are respectively connected to the two elastic tensioning structures (7).

4. The packaging film sealing structure according to claim 1 or 3, characterized in that: The elastic tensioning structure (7) includes a mounting plate (71), a rotating plate (72), a mounting strip (712), and a torsion spring (73). The mounting plate (71) is fixed on the pressure block (3). The mounting plate (71) has two oppositely arranged connecting plates (711). Both connecting plates (711) have through holes. The mounting strip (712) passes through the through holes of the two connecting plates (711) and can rotate within the through holes. Both ends of the rotating plate (72) are provided with connecting rods (721). The two connecting rods (721) are respectively connected to the two ends of the mounting strip (712). The torsion spring (73) is sleeved on the mounting strip (712). One end (731) of the torsion spring (73) abuts against the connecting plate (711), and the other end (731) abuts against the mounting plate (71). The end of the heating wire (8) is connected to the rotating plate (72), so that the rotating plate (72) squeezes the torsion spring (73) to bring the two ends (731) of the torsion spring (73) closer to each other.

5. The packaging film sealing and cutting structure according to claim 2, characterized in that: The lower side of the pressing block (3) is provided with a first slot (31) at the connection between the lower side and the end face, and the upper side of the pressing block (3) is provided with a second slot (32) at the connection between the upper side and the end face. The bottom surfaces of the first slot (31) and the second slot (32) are both arc-shaped. The bottom surface of the first slot (31) is connected to the lower side and the end face of the pressing block (3), and the bottom surface of the second slot (32) is connected to the upper side and the end face of the pressing block (3).

6. The packaging film sealing structure according to claim 1, characterized in that: It also includes a pressure plate (4), which is located on one side of the pressure block (3). The lower side of the pressure plate (4) protrudes from the lower side of the pressure block (3). The pressure block (3) is provided with a guide structure (5) that can guide the pressure plate (4) to move up and down. The pressure plate (4) is located on the guide structure (5). The guide structure (5) is provided with an elastic reset structure (6). The upper end of the elastic reset structure (6) is fixed to the guide structure (5), and the lower end of the elastic reset structure (6) abuts against the pressure plate (4). During sealing and cutting, the pressure plate (4) contacts the packaging film (10) before the heating wire (8).

7. The packaging film sealing structure according to claim 6, characterized in that: Each side of the pressure block (3) is provided with a pressure plate (4). The guide structure (5) includes a guide plate (51) and a guide post (52). The guide post (52) is located on the upper side of the pressure block (3). The guide plate (51) is provided with a guide hole. The guide post (52) passes through the guide hole. The two sides of the guide plate (51) are respectively connected to the two pressure plates (4). The elastic reset structure (6) includes a reset spring (61). The upper end of the guide post (52) is provided with a limiting ring (53). The reset spring (61) is sleeved on the guide post (52). Its upper and lower ends respectively squeeze the limiting ring (53) and the guide plate (51).

8. A packaging machine, characterized in that: Includes the packaging film sealing structure as described in any one of claims 1 to 7.

9. The packaging machine according to claim 8, characterized in that: It also includes a conveyor (20) and a film feeding mechanism (30), the film feeding mechanism (30) being used to convey the packaging film (10) between the conveyor (20) and the sealing and cutting table (2).

Images