Bag sealing machine

Abstract

The utility model discloses a bag sealing machine which comprises a machine frame, a film placing mechanism and a heat sealing mechanism, the film placing mechanism and the heat sealing mechanism are arranged on the machine frame, and the heat sealing mechanism comprises a vertical heat sealing assembly used for conducting vertical heat sealing on an arriving film and a transverse heat sealing assembly located below the vertical heat sealing assembly and used for conducting transverse heat sealing and cutting off on the arriving film. The vertical heat sealing assembly comprises a first power part and two first rotating shafts which are driven by the first power part to rotate and are arranged in a spaced mode, a pair of first heat sealing gears which are meshed with each other are arranged at one ends of the two first rotating shafts, and first electric heating pipes are installed in the two first rotating shafts; the other ends of the two first rotating shafts are further provided with a pair of second heat sealing gears which are meshed with each other, and the circumferential faces of all the heat sealing gears are knurled faces. According to the utility model, a pair of meshed second heat sealing gears is additionally arranged at the other ends of the two first rotating shafts, so that the two ends of the two first rotating shafts are uniformly stressed, the rotation is stable, and the service life of the first rotating shafts is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of automatic packaging, specifically to a bag sealing machine. Background Technology

[0002] Granular products are typically packaged in small packets of 4-6 pieces. Current technology uses film for heat-sealing. During vertical heat sealing, a pair of meshing heat-sealing gears are usually placed on two rotating shafts at the positions where the film needs to be sealed. Each gear has a knurled surface. The film to be sealed is fed between the two gears, and the rotating shafts rotate, causing the knurled surfaces of the gears to rotate and thus heat-sealing the film. However, with this structure, one end of the rotating shaft with the heat-sealing gears is under load, while the other end is not. This causes the two shafts to operate under uneven load, leading to deformation and damage, and a short service life. Utility Model Content

[0003] Based on this, and in response to the above problems, this utility model provides a bag sealing machine.

[0004] The objective of this utility model can be achieved through the following technical solutions:

[0005] A bag sealing machine includes a frame, a film feeding mechanism located on the upper part of the frame for feeding film, and a heat sealing mechanism located below the film feeding mechanism for packaging the arriving product. The heat sealing mechanism includes a vertical heat sealing component for vertically heat sealing the arriving film, and a horizontal heat sealing component located below the vertical heat sealing component for horizontally heat sealing and cutting the arriving film. The vertical heat sealing component includes a first power part, two spaced first rotating shafts driven to rotate by the first power part, a pair of meshing first heat sealing gears provided at one end of the two first rotating shafts, a first heating tube installed in each of the two first rotating shafts, and a pair of meshing second heat sealing gears provided at the other end of the two first rotating shafts. The circumferential surface of all heat sealing gears is knurled.

[0006] By adopting the above technical solution, by adding a pair of meshing second heat-sealed gears to the other end of the two first rotating shafts, the two ends of the two first rotating shafts are subjected to uniform force and rotate smoothly, thereby extending the service life of the first rotating shafts.

[0007] In a specific embodiment of this utility model: the transverse heat sealing assembly includes a second power part and two spaced second rotating shafts driven to rotate by the second power part. Two cooperating cutters are provided on the two second rotating shafts. A second electric heating tube is installed inside each of the two rotating shafts. A temperature controller electrically connected to all the electric heating tubes is provided on the frame.

[0008] In a specific embodiment of this utility model: the film unwinding mechanism includes an unwinding shaft rotatably connected to the frame for mounting a roll of film, multiple guide rollers, and a guide member located below the multiple guide rollers. The end of the film passes through all the guide rollers in sequence, passes through the outer surface of the guide member, and then enters the heat sealing mechanism.

[0009] In a specific embodiment of this utility model: the guide member has a semi-conical structure with an inner diameter that gradually decreases from top to bottom. The guide member is divided into a stop portion, a guide portion, and an insertion portion, wherein the insertion portion is inserted between the two first rotating shafts and located in front of the first heat-sealing gear. With this structure, the film wraps around the guide member to form a semi-conical structure, facilitating heat sealing of the film. The insertion portion of the guide member can open up the two adjacent sides of the film, allowing the product to enter the film more smoothly and facilitating subsequent heat sealing.

[0010] In a specific embodiment of this utility model: a thin film sensor for detecting the thin film is also provided on the frame next to the film feeding mechanism.

[0011] In a specific embodiment of this utility model, a rectangular frame is fixed to the lower part of the frame. Two horizontal sliding grooves are provided at intervals on the front and rear side plates of the frame. The two ends of the two first rotating shafts are respectively installed in the two upper sliding grooves by sliders, and the two ends of the two second rotating shafts are respectively installed in the two lower sliding grooves by sliders.

[0012] In a specific embodiment of this utility model: the frame is provided with a first pressure regulator to adjust the pressure between the two first heat-sealing gears and a second pressure regulator to adjust the pressure between the two cutters.

[0013] In a specific embodiment of this utility model: both the first pressure adjustment and the second pressure adjustment include two adjusting bolts and two locking nuts. The right side of both side plates is provided with through holes that communicate with the corresponding slide grooves. The right slider has mounting holes at the positions corresponding to the through holes. Both the through holes and the mounting holes are threaded holes. The end of the adjusting bolt passes through the corresponding locking nut and the through hole and is tightened in the mounting hole.

[0014] In summary, by adding a pair of meshing second heat-sealing gears to the other end of the two first rotating shafts, the forces on both ends of the two first rotating shafts are evenly distributed during rotation, thereby extending the service life of the first rotating shafts. When it is necessary to package the arriving products, the two first heat-sealing gears rotate to heat-seal the vertical portion of the film and convey the film downwards to the transverse heat-sealing assembly; the transverse heat-sealing assembly then uses two rotating cutters to perform transverse heat sealing and cutting of the film. The structure is simple and easy to use. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 This is a structural schematic diagram of a bag sealing machine according to the present invention;

[0017] Figure 2 This is a schematic diagram of the film-dispensing mechanism of this utility model;

[0018] Figure 3 This is a schematic diagram of the heat sealing mechanism of this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the transverse heat-sealing component of this utility model;

[0020] Figure 5 This shows the thin film encasing the guide;

[0021] Figure 6 yes Figure 5 Sectional view at point AA. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1 As shown, this utility model is a bag sealing machine, including a frame 10, a film feeding mechanism 20 located on the upper part of the frame 10 for feeding the film 9, and a heat sealing mechanism 40 located below the film feeding mechanism 20 for packaging the arriving products.

[0024] Combination Figure 2 , Figure 5 and Figure 6 As shown, the film unwinding mechanism 20 includes an unwinding shaft 21 rotatably connected to the frame 10 for mounting a roll of film 9, multiple guide rollers 22, and a guide member 30 located below the multiple guide rollers 22. Two clamping members 221 for clamping and fixing the roll of film 9 are detachably connected to the unwinding shaft 21. Thus, the roll of film is inserted into the unwinding shaft 21, and then the two clamping members are adjusted to clamp and fix the roll of film. During operation, the ends of the roll of film first pass around the multiple guide rollers 22, through the outer surface of the guide member 30, and into the heat sealing mechanism 40.

[0025] In this embodiment, the guide 30 has a semi-conical structure with its inner diameter gradually decreasing from top to bottom. The film wraps around the guide to form a semi-conical structure, facilitating subsequent heat sealing by the heat sealing mechanism. The guide 30 consists of a stop portion 31, a guide portion 32, and an insertion portion 33 connected sequentially from top to bottom. The insertion portion 33 extends downward and inserts between the two first rotating shafts of the heat sealing mechanism 40, located in front of the first heat sealing gear 412. The insertion portion 33 can open the two inwardly approaching sides of the film, allowing the product to enter the film more smoothly.

[0026] A film sensor 11 for detecting the film is also provided on the frame 10 next to the film feeding mechanism. The film sensor 11 is fixed to the frame 10 by a sensor bracket 13. In this way, when the entire roll of film is used up, the film sensor 11 will not detect the film and will issue an alarm, indicating that a new roll of film needs to be replaced. In this embodiment, the film sensor can be a photoelectric sensor.

[0027] The heat sealing mechanism 40 includes a vertical heat sealing assembly 41 for vertically heat sealing the arriving film, and a horizontal heat sealing assembly 42 for transversely heat sealing and cutting the arriving film. The vertical heat sealing assembly 41 is located above the horizontal heat sealing assembly 42.

[0028] Combination Figure 3 and Figure 4 As shown, in this embodiment, the vertical heat-sealing assembly 41 includes a pair of spaced-apart first rotating shafts 411. Two meshing first heat-sealing gears 412 are provided at one end of each first rotating shaft 411, and two meshing second heat-sealing gears 413 are provided at the other end. The circumferential surfaces of both the first and second heat-sealing gears are knurled. A first heating element 43 is installed within each first rotating shaft 411. A first power unit is also connected to one side of each of the two first rotating shafts 411. When heat-sealing the film vertically, the vertical portion of the film is first fed between the two heat-sealing gears. The first power unit drives the two heat-sealing gears to rotate, thereby heat-sealing the film. Simultaneously, the rotation of the two first heat-sealing gears can convey the film downwards to the horizontal heat-sealing assembly 42. The horizontal heat-sealing assembly 42 includes a pair of spaced-apart second rotating shafts 421, with two cooperating cutters 422 on each second rotating shaft 421. A second heating element 44 is installed within each of the second rotating shafts 421. A second power unit is also connected to one side of each of the two second rotating shafts 421. The second power unit drives the two second rotating shafts 421 to rotate, which in turn drives the two cutters to rotate. When the film is fed between the cutters, as the two cutters rotate and come into contact with each other, they perform a transverse heat-sealing and cutting of the film. Simultaneously, the remaining portion of the cut film has its ends pre-heat-sealed laterally, preparing it for the next product packaging. A temperature controller (not shown) electrically connected to all the heating elements is provided on the frame 10.

[0029] Both the first and second power components described above use electric motors to drive the rotating shaft. Electric motor drive is existing technology and will not be elaborated upon here.

[0030] like Figure 3 As shown, a rectangular frame 50 is fixed at the lower part of the frame 10. The front and rear side plates 51 of the frame 50 each have two horizontal sliding grooves 52 spaced apart vertically. The two ends of the two first rotating shafts 411 are respectively mounted in the two upper sliding grooves 52 via sliders 53. The two ends of the two second rotating shafts 421 are respectively mounted in the two lower sliding grooves 52 via sliders 53.

[0031] The side plate 51 is provided with a first pressure regulator 55 for adjusting the pressure between the two heat-sealing gears 412 and a second pressure regulator 56 for adjusting the pressure between the two cutters 422. In this embodiment, both the first pressure regulator 55 and the second pressure regulator 56 include two adjusting bolts 57 and two locking nuts 58. A through hole 571 communicating with the corresponding slide groove 52 is provided on the right side surface of both the front and rear side plates 51. A mounting hole 572 is provided on the right slider 53 at the position corresponding to the through hole 571. Both the through hole 571 and the mounting hole 572 are threaded holes. The end of the adjusting bolt 57 passes through the corresponding locking nut 58 and the through hole 571 and is tightened into the mounting hole 572. When pressure adjustment is required, first loosen the adjusting bolt 57 to separate the adjusting bolt 57 from the corresponding right slider 53. Then, move the right slider 53 left and right to adjust its position. After adjusting the position, tighten the adjusting bolt 57 and the locking nut 58 respectively.

[0032] The above describes a bag sealing machine according to this utility model, and its working principle is as follows:

[0033] The unwinding spool unwinds naturally, and the film end passes sequentially over multiple guide rollers, then over the outer surface of the guide, and enters between the two heat-sealing gears of the heat-sealing mechanism. The heat-sealing mechanism is then activated. The film wraps around the guide to form a semi-conical shape, and the discharge port of the feeding device 8 is located above the guide section of the guide. Thus, the chain 802 of the feeding device 8 drives the material container 801 to the discharge port, and the product in the material container 801 falls freely, passing under the guide and into the film. Then, the two heat-sealing gears rotate to heat-seal the vertical portion of the film and transfer it to the horizontal heat-sealing assembly. The horizontal heat-sealing assembly uses two rotating cutters to horizontally heat-seal and cut the film, completing the packaging of the current product. Simultaneously, the remaining ends of the cut film are pre-heat-sealed horizontally to prepare for the next product to be packaged.

[0034] In summary, by adding a pair of meshing second heat-sealing gears to the other end of the two first rotating shafts, the forces on both ends of the two first rotating shafts are evenly distributed during rotation, thereby extending the service life of the first rotating shafts. When it is necessary to package the arriving products, the two first heat-sealing gears rotate to heat-seal the vertical portion of the film and convey the film downwards to the transverse heat-sealing assembly; the transverse heat-sealing assembly then uses two rotating cutters to perform transverse heat sealing and cutting of the film. The structure is simple and easy to use.

[0035] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A bag sealing machine, comprising a frame, a film unwinding mechanism disposed on the upper part of the frame for unwinding film, and a heat sealing mechanism located below the film unwinding mechanism for packaging arriving products, the heat sealing mechanism comprising a vertical heat sealing component for vertically heat sealing the arriving film, and a horizontal heat sealing component located below the vertical heat sealing component for horizontally heat sealing and cutting the arriving film, the vertical heat sealing component comprising a first power part, two spaced-apart first rotating shafts driven to rotate by the first power part, a pair of meshing first heat sealing gears disposed at one end of the two first rotating shafts, and a first heating element installed in each of the two first rotating shafts, characterized in that, At the other end of the two first rotating shafts, there is a pair of meshing second heat-sealed gears, and the circumferential surfaces of all heat-sealed gears are knurled.

2. The bag sealing machine according to claim 1, characterized in that, The transverse heat sealing assembly includes a second power part and two spaced second rotating shafts driven to rotate by the second power part. Two cooperating cutters are provided on the two second rotating shafts. A second electric heating tube is installed inside each of the two rotating shafts. A temperature controller electrically connected to all the electric heating tubes is provided on the frame.

3. The bag sealing machine according to claim 1, characterized in that, The film unwinding mechanism includes an unwinding shaft rotatably connected to the frame for mounting a roll of film, multiple guide rollers, and a guide member located below the multiple guide rollers. The end of the film passes through all the guide rollers in sequence, passes the outer surface of the guide member, and then enters the heat sealing mechanism.

4. The bag sealing machine according to claim 3, characterized in that, The guide is a semi-conical structure with an inner diameter that gradually decreases from top to bottom. The guide is divided into a stop part, a guide part, and an insertion part. The insertion part is inserted between the two first rotating shafts and is located in front of the first heat-sealed gear.

5. The bag sealing machine according to claim 3, characterized in that... A thin film sensor for detecting the thin film is also installed on the frame next to the film feeding mechanism.

6. The bag sealing machine according to claim 1, characterized in that, It also includes a rectangular frame fixed to the lower part of the frame. The front and rear side plates of the frame are each provided with two horizontal sliding grooves spaced at different heights. The two ends of the two first rotating shafts are respectively installed in the two upper sliding grooves by sliders, and the two ends of the two second rotating shafts are respectively installed in the two lower sliding grooves by sliders.

7. The bag sealing machine according to claim 6, characterized in that, The frame is provided with a first pressure regulator to adjust the pressure between the two first heat-sealing gears and a second pressure regulator to adjust the pressure between the two cutters.

8. The bag sealing machine according to claim 7, characterized in that, Both the first and second pressure adjustments include two adjusting bolts and two locking nuts. The right side of both side plates is provided with through holes that communicate with the corresponding slide grooves. The right slider has mounting holes at the positions corresponding to the through holes. Both the through holes and the mounting holes are threaded holes. The end of the adjusting bolt passes through the corresponding locking nut and the through hole and is tightened in the mounting hole.

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