Heat sealing device

Abstract

The utility model belongs to the technical field of packaging equipment, and particularly relates to a heat sealing device, a bag feeding frame and a press fit mechanism, the press fit mechanism comprises a horizontal pushing frame, a supporting outer wall and a press roller, the press roller is arranged on one side of the horizontal pushing frame, the supporting outer wall is arranged on the other side of the horizontal pushing frame in parallel, and a sealing mechanism is arranged on the horizontal pushing frame. The sealing mechanism comprises a heat sealing plate used for heat sealing of a packaging bag and a containing groove used for containing the heat sealing plate, and telescopic rods are arranged in the pressing mechanism and the sealing mechanism correspondingly and used for horizontally pushing the horizontal pushing frame and the heat sealing plate. The sealing position of the packaging bag can be fully stretched through the pressing mechanism firstly, so that the packaging bag can be heated and sealed by the heat sealing plate 4 in a flat mode, and the wrinkling phenomenon of the packaging bag in the heat sealing process can be reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of packaging equipment, and particularly relates to a heat sealing device. Background Art

[0002] In the packaging process of food production, hot press sealing is usually used to seal the packaging bag. Hot press sealing is to heat the sealing material in some way to make it reach a viscous flow state and then apply pressure to make it stick. It is usually completed using a hot press sealing device or a hot press sealing machine.

[0003] In the prior art, when heat-sealing food-filled packaging bags, a heat-sealing head is usually used to directly squeeze the two sides of the packaging bag seal. However, plastic packaging bags are prone to wrinkles. Such direct heat sealing will result in uneven heat sealing. The heat-sealing wrinkles can easily cause seal leakage and also affect the appearance of the packaging bag.

[0004] The above information disclosed in the background technology section is only used to enhance the understanding of the background technology of the technology described in this article. Therefore, the background technology may contain certain information that does not form the prior art known in this country to those skilled in the art. Utility Model Content

[0005] In view of this, the present invention provides a heat sealing device, the purpose of which is to enable the heat sealing device to fully stretch the sealing part of the packaging bag through the pressing mechanism when heat sealing the packaging bag, so that the packaging bag can remain flat and be heated and sealed by the heat sealing plate 4, thereby helping to reduce the wrinkles of the packaging bag during the heat sealing process.

[0006] The technical solutions adopted in this utility model are as follows:

[0007] A heat sealing device, comprising:

[0008] bag feeding frame;

[0009] A pressing mechanism, comprising a horizontal push frame, a supporting outer wall and a pressing roller, wherein the pressing roller is arranged on one side of the horizontal push frame, and the supporting outer wall is arranged parallel to the other side of the horizontal push frame;

[0010] A sealing mechanism, comprising a heat-sealing plate for heat-sealing the packaging bag, and a receiving slot for receiving the heat-sealing plate;

[0011] Telescopic rods, respectively provided in the pressing mechanism and the sealing mechanism, for horizontally pushing the push frame and the heat sealing plate;

[0012] The two push racks are provided with a pressure roller on both sides of the bag feed frame opening, and the two receiving grooves are provided on the inner walls on both sides of the bag feed frame, wherein the heat sealing plates received in the receiving grooves are distributed in parallel below the push racks.

[0013] As a preferred technical solution, the push frame is provided with side frames corresponding to the two ends of the pressure roller, and slots corresponding to the side frames, wherein one end of the side frame away from the pressure roller is movably inserted into the slot.

[0014] Furthermore, a lifting assembly for vertically pushing and pulling the side frame is provided in the slot, and the lifting assembly includes a lifting arm, wherein one end of the lifting arm is connected to one end of the side frame located in the slot, and the other end of the lifting arm is connected to an external driving device.

[0015] Furthermore, the bottom of one end of the horizontal push frame is provided with a slide block, and the two sides of the opening of the bag feeding frame are provided with guide grooves corresponding to the slide block.

[0016] Furthermore, the telescopic rod is arranged between the supporting outer wall and the horizontal pushing frame.

[0017] Furthermore, the telescopic rod is arranged between the inner wall of the storage groove and the heat sealing plate.

[0018] Furthermore, a connecting rod is provided on each side of the two heat-sealing plates facing each other, and the ends of the two connecting rods facing each other overlap with each other, wherein a latch is movably inserted into the overlapping part of the two connecting rods.

[0019] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0020] By setting the pressing mechanism, the heat sealing device can first fully stretch the sealing part of the packaging bag through the pressing mechanism when heat sealing the packaging bag, so that the packaging bag can remain flat and be heated and sealed by the heat sealing plate 4, thereby helping to reduce the wrinkles of the packaging bag during the heat sealing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be described by way of examples with reference to the accompanying drawings, in which:

[0022] Figure 1 This is a structural schematic diagram of a heat sealing device provided by the utility model;

[0023] Figure 2 This is a schematic structural diagram of the heat sealing plate provided by the utility model;

[0024] Figure 3 It is a structural schematic diagram of the horizontal push frame provided by the utility model.

[0025] Bag feeding frame -1; horizontal push frame -2; supporting outer wall -3; heat sealing plate -4; connecting rod -5; latch -6; storage slot -7; guide slot -8; side frame -9; pressure roller -10; slot -11; lifting arm -12; slider -13. DETAILED DESCRIPTION

[0026] The following is a clear and complete description of the technical solutions in the embodiments of the present invention, in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] Example 1: In the prior art, when heat-sealing food packaging bags, the standard process involves applying pressure directly to both sides of the bag's seal using a heat sealer. However, given the tendency of plastic bags to wrinkle, directly performing this heat-sealing step can result in uneven seal edges. Wrinkles formed during the heat-sealing process not only increase the risk of seal leakage but also negatively impact the overall aesthetics of the bag.

[0028] Therefore, in order to solve the problem that the existing heat sealing device is prone to wrinkles when heat sealing the packaging bag, which affects the sealing quality and the aesthetics of the packaging bag, and to achieve the function of reducing wrinkles and improving the sealing quality, the utility model discloses a heat sealing device, Figure 1 , including a bag feeding frame 1, a pressing mechanism, the pressing mechanism includes a horizontal pushing frame 2, a supporting outer wall 3 and a pressing roller 10, the pressing roller 10 is arranged on one side of the horizontal pushing frame 2, and the supporting outer wall 3 is arranged parallel to the other side of the horizontal pushing frame 3, a sealing mechanism, the sealing mechanism includes a heat-sealing plate 4 for heat-sealing the packaging bag, and a receiving groove 7 for receiving the heat-sealing plate 4, a telescopic rod is respectively arranged in the pressing mechanism and the sealing mechanism, for horizontally pushing the horizontal pushing frame 2 and the heat-sealing plate 4; the two sides of the horizontal pushing frames 2 with the pressing roller 10 are relatively arranged on both sides of the opening of the bag feeding frame 1, and the two pairs of receiving grooves 7 are arranged on the inner walls on both sides of the bag feeding frame 1, wherein the heat-sealing plates 4 received in the receiving grooves 7 are distributed in parallel below the horizontal pushing frame 2;

[0029] In this embodiment, through the above-mentioned structure, when it is necessary to heat-seal a packaging bag filled with food, the user can enter the bag inlet frame 1 through the opening of the bag inlet frame 1. At this time, the two oppositely arranged horizontal push frames 2 remain stationary, and the pressure rollers 10 hover on both sides of the opening of the bag inlet frame 1 to prepare for the subsequent pressing process. As the packaging bag is completely inserted, the pressing mechanism located above the opening of the bag inlet frame 1 begins to work. In the pressing mechanism, the telescopic rod drives the horizontal push frame 2 to move toward the sealing area of the packaging bag, so that the pressure rollers 10 on both sides of the packaging bag gradually approach and contact the sealing area of the packaging bag. During this process, the uniform pressure distribution of the pressure rollers 10 ensures that the packaging bag can remain flat when heated, effectively avoiding the generation of heat seal wrinkles.

[0030] At the same time, the heat-sealing plate 4 in the sealing mechanism, driven by the telescopic rod, slides horizontally out of the receiving slot 7 and accurately aligns with the sealing position of the packaging bag. The heating element integrated into the heat-sealing plate 4 quickly heats up to the set temperature and transfers heat to the sealing area of the packaging bag through heat conduction, causing the plastic material to soften and fuse under the high temperature, thus achieving a sealing effect.

[0031] In summary, through the above scheme, when the heat sealing device heat seals the packaging bag, it can first fully stretch the sealing part of the packaging bag through the pressing mechanism, so that the packaging bag can remain flat and be heated and sealed by the heat sealing plate 4, thereby helping to reduce the wrinkles of the packaging bag during the heat sealing process.

[0032] After the heat sealing operation is completed, the telescopic rod drives the push frame 2 and the heat sealing plate 4 in the reverse direction to return to the initial position so as to facilitate the sealing operation of the next packaging bag.

[0033] In this embodiment, the telescopic rod is arranged between the supporting outer wall 3 and the horizontal pushing frame 2. Through this arrangement, the telescopic rod can directly act on the horizontal pushing frame 2, providing a stable and uniform horizontal thrust, ensuring that the pressing roller 10 can smoothly press the sealing area of the packaging bag;

[0034] Furthermore, the telescopic rod is arranged between the inner wall of the receiving groove 7 and the heat sealing plate 4. This arrangement ensures that the heat sealing plate 4 can accurately and stably slide out of the receiving groove 7 under the drive of the telescopic rod and quickly locate to the sealing position of the packaging bag;

[0035] At the same time, the telescopic rods are all connected to corresponding driving members and driven by the driving members, which can be cylinders or hydraulic equipment.

[0036] Example 2: Based on Example 1, in order to further improve the stretching effect of the pressing mechanism on the sealing of the packaging bag, refer to Figure 1The present invention further includes a lifting assembly for lifting and lowering the pressure roller 10. Specifically, a lifting assembly for vertically pushing and pulling the side frame 9 is provided in the slot 11. The lifting assembly includes a lifting arm 12, wherein one end of the lifting arm 12 is connected to the end of the side frame 9 located in the slot 11, and the other end of the lifting arm 12 is connected to an external driving device;

[0037] In this embodiment, through the above structure, when the packaging bag enters the bag feeding frame 1, the telescopic rod drives the horizontal pushing frame 2 to make the pressure roller 10 close to the sealing position of the packaging bag. At this time, the lifting component starts to work, and the lifting arm 12 exerts an upward force on the side frame 9 through an external driving device (such as a motor, a cylinder, etc.), so that the side frame 9 drives the pressure roller 10 to move in the vertical direction, thereby realizing the lifting and lowering action of the pressure roller 10;

[0038] The purpose of this lifting action is to add an additional stretching effect on the basis of horizontal pressing at the sealing area, further eliminating wrinkles in the sealing area of the packaging bag. When the pressure roller 10 is pushed horizontally to be in close contact with the packaging bag, its evenly distributed pressure not only ensures the flatness of the packaging bag, but also makes the sealing area tighter and flatter through vertical stretching, thereby helping to reduce the risk of wrinkles during the heat sealing process.

[0039] In this embodiment, the pressure roller 10 is a rotatable cylindrical structure. At the same time, in order to improve the stability of the pressure roller 10, the push frame 2 is provided with side frames 9 corresponding to the two ends of the pressure roller 10, and slots 11 corresponding to the side frames 9. The end of the side frame 9 away from the pressure roller 10 is movably inserted into the slot 11, and the two ends of the pressure roller 10 are movably inserted into the side frames 9. At the same time, the side frames 9 can play the role of clamping the pressure roller 10, so that the pressure roller 10 can be more stable when rotating.

[0040] Example 3: Based on any one of the examples 1 and 2, in order to avoid the vibration generated by the horizontal push frame 2 during horizontal movement and further reduce the wrinkles at the sealing portion of the packaging bag, refer to Figure 2-Figure 3 The present invention also includes a guide groove 8 for limiting the moving route of the horizontal push frame 2. Specifically, the horizontal push frame 2 is provided with a slot 11 and a slider 13 is provided at the bottom of one end. The bag feeding frame 1 is provided with a horizontal push frame 2 and guide grooves 8 corresponding to the slider 13 are provided on both sides of the opening.

[0041] In this embodiment, through the above-described structure, during the horizontal movement of the push frame 2, the slider 13 slides along the predetermined path of the guide groove 8. The design of the guide groove 8 not only provides a stable trajectory for the movement of the push frame 2, but also greatly reduces vibration and deviation caused by unstable movement, further ensuring that the pressing roller 10 can accurately and smoothly press the sealing area of the packaging bag.

[0042] Furthermore, the inner wall of the guide groove 8 can be made of a low-friction material, such as polytetrafluoroethylene (PTFE) or Teflon coating, to reduce the frictional resistance of the slider 13 during its sliding process, making the push frame 2 move more smoothly and quickly. This design not only improves the efficiency of the heat sealing operation but also extends the service life of the equipment.

[0043] Example 4: Based on Example 1, in order to improve the stability of the heat sealing plate 4 during horizontal movement and further avoid the occurrence of heat sealing dislocation, refer to Figure 2 The present invention further includes a connecting rod 5 for improving the stability of the heat sealing plate 4. Specifically, the two heat sealing plates 4 are provided with a connecting rod 5 on one side facing each other, and the ends of the two connecting rods 5 facing each other overlap with each other, wherein the overlapping of the two connecting rods 5 is movably interspersed with a latch 6;

[0044] In this embodiment, through the above arrangement, when the heat sealing plates 4 are moved horizontally out of the receiving slots 7 under the drive of the telescopic rod, the two heat sealing plates 4 are connected by the connecting rod 5 and the latch 6 to form a whole, thereby enhancing the stability and rigidity of the heat sealing plates 4 during movement and effectively preventing heat sealing misalignment caused by vibration or deviation.

[0045] Specifically, the connecting rod 5 serves as a bridge connecting the two heat-sealing plates 4. It not only transmits the driving force but also shares the stress and impact during the movement. The latch 6 serves as a series connection point. When the two heat-sealing plates 4 move relative to each other, the two connecting rods 5 will arch upward with the latch 6 as the fulcrum. When the two heat-sealing plates 4 are reset, the two connecting rods 5 will be stretched downward and tend to be horizontal.

[0046] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0047] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A heat sealing device, characterized in that: include: bag feeding frame (1); A pressing mechanism, the pressing mechanism comprising a horizontal push frame (2), a supporting outer wall (3) and a pressing roller (10), the pressing roller (10) being arranged on one side of the horizontal push frame (2), and the supporting outer wall (3) being arranged parallel to the other side of the horizontal push frame (2); A sealing mechanism, the sealing mechanism comprising a heat-sealing plate (4) for heat-sealing the packaging bag, and a receiving groove (7) for receiving the heat-sealing plate (4); Telescopic rods, respectively arranged in the pressing mechanism and the sealing mechanism, for horizontally pushing the push frame (2) and the heat sealing plate (4); The two push racks (2) are provided with a pressure roller (10) on one side thereof and are arranged on opposite sides of the opening of the bag feeding frame (1). The two receiving grooves (7) are arranged on the inner walls on both sides of the bag feeding frame (1), wherein the heat sealing plates (4) received in the receiving grooves (7) are distributed in parallel below the push racks (2).

2. The heat sealing device according to claim 1, characterized in that The push frame (2) is provided with side frames (9) corresponding to the two ends of the pressure roller (10), and slots (11) corresponding to the side frames (9), wherein one end of the side frame (9) away from the pressure roller (10) is movably inserted into the slot (11).

3. The heat sealing device according to claim 2, characterized in that A lifting assembly for vertically pushing and pulling the side frame (9) is provided in the slot (11), and the lifting assembly includes a lifting arm (12), wherein one end of the lifting arm (12) is connected to one end of the side frame (9) located in the slot (11), and the other end of the lifting arm (12) is connected to an external driving device.

4. The heat sealing device according to any one of claims 1-2, characterized in that: The horizontal push frame (2) is provided with a slot (11), and a slider (13) is provided at the bottom of one end thereof. The bag feeding frame (1) is provided with a horizontal push frame (2), and guide grooves (8) corresponding to the slider (13) are provided on both sides of the opening.

5. The heat sealing device according to claim 1, characterized in that The telescopic rod is arranged between the supporting outer wall (3) and the horizontal pushing frame (2).

6. The heat sealing device according to claim 1, characterized in that The telescopic rod is arranged between the inner wall of the receiving groove (7) and the heat sealing plate (4).

7. The heat sealing device according to claim 1 or 6, characterized in that: A connecting rod (5) is provided on each side of the two heat sealing plates (4) facing each other, and the ends of the two connecting rods (5) facing each other overlap with each other, wherein a latch (6) is movably inserted through the overlapping of the two connecting rods (5).

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