Sealing equipment

Abstract

The invention discloses sealing equipment which comprises a supporting frame, a sealing device and a sealing device. The connecting seat can be movably mounted on the mounting surface in a first direction, and the first direction is parallel to the mounting surface; the heat sealing assembly comprises a heating plate and two opposite pressing plates; the heating plate is fixed to the side, deviating from the mounting surface, of the connecting base and is conductive, the heating plate comprises two hot pressing surfaces arranged in the second direction, and the second direction is parallel to the mounting surface and perpendicular to the mounting surface; the two opposite pressing plates are arranged opposite to the two hot pressing faces respectively, and each opposite pressing plate can move in the second direction relative to the hot pressing faces; the driving assembly is used for driving the connecting base to move in the first direction and driving the two opposite pressing plates to move in the second direction. According to the sealing equipment, two packaging bags can be sealed at the same time, the sealing efficiency of the packaging bags can be improved, and the sealing time of the packaging bags is shortened.

Description

Technical Field

[0001] The invention relates to the technical field of packaging, in particular to a sealing device. Background Art

[0002] Traditional Chinese medicine is the main component of traditional Chinese medicine and the main weapon for the Chinese people to prevent and treat diseases and strengthen their bodies. In recent years, due to the high safety and low side effects of traditional Chinese medicine, it has become the first choice for seeing a doctor and taking medicine. On the production line of traditional Chinese medicine preparations, after the traditional Chinese medicine granules are filled into the packaging bag, the packaging bag needs to be sealed. The sealing equipment in the existing technology can only seal a single packaging bag at a time, which will affect the production efficiency of traditional Chinese medicine preparations. Summary of the invention

[0003] The present invention provides a sealing device, which can seal two packaging bags at the same time, improve the sealing efficiency of the packaging bags, and reduce the sealing time of the packaging bags.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] A sealing device, comprising:

[0006] A support frame, the support frame comprising a mounting surface;

[0007] A connecting seat, the connecting seat is movably mounted on the mounting surface along a first direction, wherein the first direction is parallel to the mounting surface;

[0008] A heat sealing assembly, the heat sealing assembly comprising a heating plate and two counter-pressure plates;

[0009] The heating plate is fixed to a side of the connecting seat away from the mounting surface and is conductive, and comprises two hot pressing surfaces arranged along a second direction, each of the hot pressing surfaces is provided with a heating strip extending along a first direction, and the second direction is parallel to the mounting surface and perpendicular to the second direction;

[0010] The two pressing plates are respectively arranged opposite to the two hot pressing surfaces, each of the pressing plates can move along the second direction relative to the hot pressing surface, and each of the pressing plates has a heat-resistant pad arranged opposite to the heating strip on one side facing the heating plate;

[0011] A driving assembly is used to drive the connecting seat and the heating assembly to move along a first direction and to drive the two pressing plates to move along a second direction.

[0012] Optionally, the side of the heating strip facing the heat-resistant pad has a heat-conducting and insulating anti-sticking pad.

[0013] Optionally, the hot pressing surface is provided with a heat insulating pad except for the area where the heating strip is located.

[0014] Optionally, the heat sealing assembly further comprises a heating electrode group, wherein the heating electrode group comprises a positive electrode and a negative electrode connected to the heating plate.

[0015] Optionally, at least one first guide rail extending along the first direction is provided on the mounting surface, and the side of the connecting seat facing the mounting surface has at least one first slider corresponding to the at least one first guide rail, and the first slider and the corresponding first guide rail can be slidably connected along the first direction.

[0016] Optionally, the pressure plate is slidably connected to the connecting seat via a first connecting portion, and the connecting seat has at least one second guide rail extending along the second direction on a side facing the heating plate, and the first connecting portion has at least one second slider corresponding to the at least one second guide rail, and the second slider is slidably connected to the corresponding second guide rail along the second direction.

[0017] Optionally, the driving assembly includes a driving motor, a transmission assembly, a threaded screw, a screw nut, a second connecting portion and a third connecting portion;

[0018] The threaded screw is located between the support surface and the heating plate, the threaded screw extends along a first direction, and both ends of the threaded screw are rotatably connected to the support frame;

[0019] The lead screw nut is threadedly connected to the threaded lead screw, and the connecting seat is connected to the lead screw nut via a second connecting portion;

[0020] The driving motor is mounted on the supporting frame, and the driving motor is transmission-connected to the first end of the threaded screw through the transmission assembly.

[0021] Optionally, it also includes at least one first limit block, at least one second limit block and at least one third limit block, wherein the at least one first limit block is arranged at the first end of the threaded screw to limit the position of the connecting seat, the at least one second limit block is located in the area of ​​the mounting surface close to the second end of the threaded screw to limit the position of the connecting seat, and the at least one third limit block is located in the area of ​​the connecting seat facing the heating plate close to the end of the second guide rail to limit the position of the pressure plate.

[0022] Optionally, the connecting seat is connected to the second connecting portion through at least one connecting rod, the connecting rod extends along the first direction, the first end of the connecting rod is connected to a side of the connecting seat adjacent to the second end of the threaded screw, the second end of the connecting rod has a limiting portion, the connecting rod passes through the second connecting portion, and a preset friction force exists between the side wall of the second end of the connecting rod and the second connecting portion;

[0023] The driving assembly also includes two transmission rods located between the support frame and the heating plate, the extension direction of the transmission rods is parallel to the mounting surface, the first end of the transmission rod is rotatably connected to the second connecting portion via a first rotating shaft, the second ends of the two transmission rods are rotatably connected to the two pressing plates via second rotating shafts, and the axis center lines of the first rotating shaft and the second rotating shaft are perpendicular to the mounting surface.

[0024] Optionally, it further includes a first sensor, a first sensing sheet, a second sensor, a second sensing sheet and a control unit;

[0025] The first sensor is located on the mounting frame and is disposed adjacent to the first end of the threaded screw, the first sensing sheet is located on the connecting seat, and the first sensor is used to detect the first sensing sheet;

[0026] The second sensor is located on the counter-pressing plate, the second sensing sheet is located on the connecting seat and is arranged adjacent to the hot-pressing surface of the heating plate, and the second sensor is used to detect the second sensing sheet;

[0027] The control unit is connected to the first sensor, the second sensor, and the drive motor signal, and is used to control the working state of the drive motor according to the detection information of the first sensor and the second sensor.

[0028] Optionally, two guide plates are further included, and the two guide plates are respectively located on both sides of the heating plate along the first direction; the end of the guide plate adjacent to the hot pressing surface has a guide angle for guiding the conveying path of the packaging bag.

[0029] The embodiment of the present invention provides a sealing device, which includes a supporting frame, a connecting seat and a heat sealing assembly. The connecting seat is installed on the mounting surface of the supporting frame and can move along a first direction. The heat sealing assembly includes a heating plate and two pressing plates. The heating plate is installed on the side of the connecting seat away from the mounting surface and is conductive. When power is applied to the heating plate, the heating plate can be made to move. The heating plate includes two hot pressing surfaces arranged along a second direction, and the two pressing plates are respectively arranged opposite to the two hot pressing surfaces. Each pressing plate can move along the second direction relative to the hot pressing surface. The first direction and the second direction are parallel to the mounting surface. The driving assembly can drive the connecting seat to move along the first direction to facilitate adjustment of the position of the heat sealing assembly. The driving assembly can drive the pressing plate in the heat sealing assembly to move along the second direction to adjust the opening and closing between the pressing plate and the hot pressing surface. The opening of the packaging bag can be sealed by pressing the heat-resistant pad on the pressing plate with the heating strip on the hot pressing surface. In the above-mentioned sealing equipment, since two sets of relatively arranged pressure plates and hot pressing surfaces are provided, two packaging bags can be sealed at the same time, which can improve the sealing efficiency of the packaging bags, reduce the sealing time of the packaging bags, and thus improve the production efficiency of traditional Chinese medicine preparations. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A structural schematic diagram of a sealing device provided by an embodiment of the present invention;

[0031] Figure 2 A plan view of a sealing device provided by an embodiment of the present invention;

[0032] Figure 3 for Figure 2 Cross-section at line AA;

[0033] Figure 4 A working state diagram of a sealing device provided by an embodiment of the present invention;

[0034] Figure 5 A structural schematic diagram of a sealing device provided by an embodiment of the present invention;

[0035] Figure 6 A schematic structural diagram of a sealing device provided in an embodiment of the present invention.

[0036] icon:

[0037] 1-support frame; 11-first guide rail; 2-connecting seat; 21-first slider; 22-second guide rail; 3-heating component; 31-heating plate; 311-heating strip; 312-anti-sticking pad; 313-thermal insulation pad; 32-pressure plate; 321-heat-resistant pad; 41-first connecting part; 411-second slider; 42-second connecting part; 43-third connecting part; 44-connecting rod; 51-drive motor; 52-transmission assembly; 521-first transmission wheel; 522-second transmission wheel; 523-transmission belt; 53-threaded screw; 54-screw nut; 55-transmission rod; 6-guide plate; 61-guide angle; 71-first limit block; 72-second limit block; 73-third limit block; 81-first sensor; 82-second sensor; 91-first sensor sheet; 100-edge sealing equipment; 200-filling box. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] Please refer to Figures 1 to 3 As shown, the present invention provides a sealing device, comprising:

[0040] A support frame 1, the support frame 1 comprises a mounting surface;

[0041] A connecting seat 2, the connecting seat 2 can be installed on the installation surface movably along a first direction, and the first direction is parallel to the installation surface;

[0042] Heat sealing assembly, the heat sealing assembly includes a heating plate 31 and two pressing plates 32;

[0043] The heating plate 31 is fixed to the side of the connection seat 2 away from the mounting surface and is conductive. The heating plate 31 includes two hot pressing surfaces arranged along the second direction, and each hot pressing surface is provided with a heating strip 311 extending along the first direction. The second direction is parallel to the mounting surface and perpendicular to the second direction.

[0044] Two counter-pressing plates 32 are respectively arranged opposite to the two hot pressing surfaces, each counter-pressing plate 32 can move along the second direction relative to the hot pressing surface, and each counter-pressing plate 32 has a heat-resistant pad 321 arranged opposite to the heating strip 311 on one side facing the heating plate 31;

[0045] The driving assembly is used to drive the connecting seat 2 and the heating assembly 3 to move along the first direction and to drive the two pressing plates 32 to move along the second direction.

[0046] The sealing device provided in the embodiment of the present invention includes a support frame 1, a connecting seat 2 and a heat sealing component. The connecting seat 2 is installed on the mounting surface of the support frame 1 and can move along a first direction. The heat sealing component includes a heating plate 31 and two pressing plates 32. The heating plate 31 is installed on the side of the connecting seat 2 away from the mounting surface and is conductive. When power is applied to the heating plate 31, the heating plate 31 can be made to include two hot pressing surfaces arranged along a second direction. The two pressing plates 32 are respectively arranged opposite to the two hot pressing surfaces. Each pressing plate 32 can move along the second direction relative to the hot pressing surface. The first direction and the second direction are parallel to the mounting surface. The driving component can drive the connecting seat 2 to move along the first direction to facilitate adjustment of the position of the heat sealing component. The driving component can drive the pressing plate 32 in the heat sealing component to move along the second direction to adjust the opening and closing between the pressing plate 32 and the hot pressing surface. The opening of the packaging bag can be sealed by pressing the heat-resistant pad 321 on the pressing plate 32 with the heating strip 311 on the hot pressing surface. In the above-mentioned sealing equipment, due to the provision of two sets of oppositely arranged pressure plates 32 and hot pressing surfaces, two packaging bags can be sealed at the same time, which can improve the efficiency of packaging bag sealing, reduce the packaging bag sealing time, and further improve the production efficiency of traditional Chinese medicine preparations.

[0047] Specifically, Figure 4 As shown, in actual application, the packaging bag can be placed in the filling box 200, at least two filling boxes 200 can be arranged side by side along the second direction, the sealing device 100 can be located above the filling box 200, and the side where the heating component 3 of the sealing device 100 is located faces the filling box 200. The initial position of the heating component 3 is located on one side of the filling box 200 along the first direction, and the initial state of the heating component 3 is that there is a receiving gap between the pressing plate 32 and the hot pressing surface for receiving the opening of the packaging bag, and the two receiving gaps can correspond to the packaging bags in the two filling boxes respectively. In the process of using the sealing device for sealing, the driving component can first drive the connecting seat 2 and the heating component 3 to move along the first direction until the openings of the two packaging bags are respectively inserted into the two receiving gaps, and then drive the two pressing plates 32 to press toward the hot pressing surface of the heating plate 31 along the second direction, and the packaging bag can be heat-sealed under the action of the heating strip 311 on the hot pressing surface and the heat-resistant pad 321 on the pressing plate 32.

[0048] In the embodiment of the present invention, Figure 3 As shown, the side of the heating strip 311 facing the heat-resistant pad 321 may have a heat-conductive and insulating anti-sticking pad 312, which can prevent the packaging bag from sticking to the heating strip 311 when the packaging bag is sealed.

[0049] In the embodiment of the present invention, Figure 3As shown, the hot pressing surface has a heat insulating pad except for the area where the heating strip 311 is located. The packaging bag can be sealed by pressing the heating strip 311 and the heat-resistant pad 321. The hot pressing surface has a heat insulating pad except for the area where the heating strip 311 is located, which can prevent the heating plate 31 from heating the packaging bag other than the opening.

[0050] In an embodiment of the present invention, the above-mentioned heat sealing component may also include a heating electrode group, which may include a positive electrode and a negative electrode connected to the heating plate 31. By applying power to the heating electrode group, the heating plate 31 can be heated, thereby providing heat for heat sealing.

[0051] In the embodiment of the present invention, at least one first guide rail 11 extending along the first direction may also be provided on the mounting surface, and the connecting seat 2 has at least one first slider 21 corresponding to the at least one first guide rail 11 on one side facing the mounting surface, and the first slider 21 is slidably connected to the corresponding first guide rail 11 along the first direction. Through the slidable connection between the first guide rail 11 and the first slider 21, the connecting seat 2 can be guided to move along the first direction on the support frame 1.

[0052] For example, Figure 5 As shown, two parallel first guide rails 11 may be provided on the mounting surface, and the connecting seat 2 has two first sliders 21 corresponding to the two first guide rails 11, respectively, which can ensure the stability of the connecting seat 2 moving along the first direction. Specifically, the number of the first guide rails 11 and the first sliders 21 is not limited here and can be determined according to actual conditions.

[0053] In the embodiment of the present invention, the above-mentioned counter-pressing plate 32 can be slidably connected to the connecting seat 2 through the first connecting portion 41, and the connecting seat 2 has at least one second guide rail 22 extending along the second direction on the side facing the heating plate 31, and the first connecting portion 41 has at least one second slider 411 corresponding to the at least one second guide rail, and the second slider 411 can be slidably connected to the corresponding second guide rail 22 along the second direction. Through the slidable connection between the second guide rail 22 and the second slider 411, the counter-pressing plate 32 can be guided to move toward the hot pressing surface or away from the hot pressing surface along the second direction.

[0054] For example, Figure 5 As shown, two parallel second guide rails 22 may be provided on the connection seat 2, and two second sliders 411 corresponding to the two second guide rails 22 may be provided on the first connection portion 41 connected to the pressing plate 32, so as to ensure the stability of the pressing plate 32 moving along the second direction. Specifically, the number of the second guide rails 22 and the second sliders 411 is not limited here and may be determined according to actual conditions.

[0055] In the embodiment of the present invention, Figure 1 and Figure 6As shown, the above-mentioned driving assembly may include a driving motor 51, a transmission assembly 52, a threaded screw 53, a screw nut 54, a second connecting portion 42, and a third connecting portion 43; wherein the threaded screw 53 is located between the supporting surface and the heating plate 31, the threaded screw 53 extends along a first direction, and both ends are rotatably connected to the support frame 1; the screw nut 54 is threadedly connected to the threaded screw 53, the heating plate 31 is connected to the screw nut 54 through the second connecting portion 42, the connecting seat 2 is connected to the screw nut 54 through the second connecting portion 42, the driving motor 51 is installed on the support frame 1, and the driving motor 51 is transmission-connected to the first end of the threaded screw 53 through the transmission assembly 52.

[0056] In the above-mentioned driving assembly, the driving motor 51 can drive the first end of the threaded screw 53 to rotate through the transmission assembly 52, thereby making the screw nut 54 move along the first direction on the threaded screw 53. The movement of the screw nut 54 can drive the second connecting part 42 to move along the first direction, and the second connecting part 42 can drive the connecting seat 2 and the heating assembly 3 to move along the first direction.

[0057] Among them, Figure 1 As shown, the transmission assembly 52 may include a first transmission wheel 521, a second transmission wheel 522 and a transmission belt 523, wherein the first transmission wheel 521 is fixed to the first end of the threaded screw 53, the second transmission wheel 522 is mounted on the motor shaft of the driving motor 51, the transmission belt 523 is sleeved on the first transmission wheel 521 and the second transmission wheel 522, and the transmission belt 523 is meshed with the first transmission wheel 521 and the second transmission wheel 522. During the driving process of the transmission assembly 52, the driving motor 51 may drive the second transmission wheel 522 to rotate, the second transmission wheel 522 drives the first transmission wheel 521 to rotate through the transmission belt 523, and the first transmission wheel 521 drives the threaded screw 53 to rotate.

[0058] Specifically, the connection seat 2 may have a first hollow area corresponding to the heating plate 31, the threaded screw 53 may be arranged to penetrate the connection seat 2 along the first direction, and the screw nut 54 on the threaded screw 53 may be located at the first hollow area.

[0059] In the embodiment of the present invention, Figure 1 and Figure 2The above-mentioned sealing device may also include at least one first limit block 71, at least one second limit block 72 and at least one second limit block 72, at least one first limit block 71 is arranged at the first end of the threaded screw 53, and is used to limit the position of the connecting seat 2 to prevent the first guide rail 11 from being separated from the first slider 21 during the movement of the connecting seat 2, at least one second limit block 72 is located in the area of ​​the mounting surface close to the second end of the threaded screw, and is used to limit the position of the connecting seat 2, and the second limit block 72 can be used to limit the position of the connecting seat 2 to prevent the first guide rail 11 from being separated from the first slider 21 during the movement of the connecting seat 2; at least one third limit block 73 is located in the area of ​​the end of the second guide rail 22 on the side of the connecting seat 2 facing the heating plate 31, and is used to limit the position of the pressing plate 32, and the third limit block 73 can be used to limit the position of the pressing plate 32 to prevent the second guide rail 22 from being separated from the second slider 411 during the movement of the pressing plate 32.

[0060] In the embodiment of the present invention, Figure 6 As shown, the above-mentioned connecting seat 2 is connected to the second connecting part 42 through at least one connecting rod 44, the connecting rod 44 extends along the first direction, the first end of the connecting rod 44 is connected to a side of the connecting seat 2 adjacent to the second end of the threaded screw 53, the second end of the connecting rod 44 has a limiting portion, the connecting rod 44 passes through the second connecting part 42, and there is a preset friction force between the side wall of the second end of the connecting rod 44 and the second connecting part 42; the driving assembly can also include two transmission rods 55 located between the support frame 1 and the heating plate 31, the extension direction of the transmission rod 55 is parallel to the installation surface, the first end of the transmission rod 55 is rotatably connected to the second connecting part 42 through the first rotating shaft, the second ends of the two transmission rods 55 are rotatably connected to the two counter-pressure plates 32 through the second rotating shaft, and the axis center line of the first rotating shaft and the axis center line of the second rotating shaft are perpendicular to the installation surface. Specifically, the counter-pressure plate 32 can be rotatably connected to the second rotating shaft through the third connecting part 43. As Figure 6 As shown, the connecting seat can be connected to the second connecting part through two connecting rods located on both sides of the threaded screw to ensure the stability of the movement of the connecting seat.

[0061] Specifically, when the heating component 3 is in the initial position, the second connecting part 42 abuts against the limiting part on the connecting rod 44, and the driving motor 51 can rotate in the positive direction to drive the second connecting part 42 to move along the first direction toward the second end of the threaded screw 53. Due to the preset friction force between the second connecting part 42 and the second end of the connecting rod 44, the second connecting part 42 can drive the connecting seat 2 and the heating component 3 to move along the first direction until it abuts against the second limiting block 72. At this time, the opening of the packaging bag can be fully inserted into the accommodating gap of the heating component 3, and the opening of the packaging can be sealed. The driving motor 51 can continue to rotate forward, driving the second connecting part 42 to continue to move along the first direction toward the second end of the threaded screw 53. Due to the obstruction of the second limit block 72, the connecting seat 2 and the heating component 3 do not move. When the resistance of the second limit block 72 is greater than the friction between the second end of the connecting rod 44 and the second connecting part 42, the second connecting part 42 can move relative to the connecting rod 44 along the first direction toward the second end of the threaded screw, and then the second connecting part 42 drives the two transmission rods 55 to rotate, and then the two transmission rods 55 can drive the two pressing plates 32 to press toward the hot pressing surface of the heating plate 31, thereby achieving the sealing of the packaging bag.

[0062] After the packaging bag is sealed, when the heating component 3 returns to its initial position, the driving motor 51 can rotate in the opposite direction to drive the second connecting part 42 to move along the second direction toward the first end of the threaded screw 53, and the second connecting part 42 can drive the connecting rod 44 to rotate, thereby driving the pressure plate 32 to move in the direction away from the hot pressing surface until the second connecting part 42 moves to the first end of the connecting rod 44. At this time, a accommodating gap is formed between the pressure plate 32 and the hot pressing surface, and then the driving motor 51 can continue to rotate in the opposite direction so that the second connecting part 42 drives the connecting seat 2 and the heating component 3 to move to the initial position.

[0063] In the embodiment of the present invention, Figure 1 and Figure 2 As shown, the above-mentioned sealing device also includes a first sensor 81, a first sensing sheet 91, a second sensor 82, a second sensing sheet and a control unit; wherein the first sensor 81 is located on the mounting frame and is arranged adjacent to the first end of the threaded screw 53, the first sensing sheet 91 is located on the connecting seat 2, and the first sensor 81 is used to detect the first sensing sheet 91; the second sensor 82 is located on the pressure plate 32, the second sensing sheet is located on the connecting seat 2 and is arranged adjacent to the hot pressing surface of the heating plate 31, and the second sensor 82 is used to detect whether the pressure plate 32 is moved into place; the control unit is connected to the first sensor 81, the second sensor 82, and the drive motor 51 signals, and is used to control the working state of the drive motor 51 according to the detection information of the first sensor 81 and the second sensor 82.

[0064] Specifically, when the packaging bag needs to be sealed, the control unit can control the drive motor 51 to rotate forward to drive the connecting seat 2 and the heating component 3 to move to abut against the second limit block 72 and press the pressure plate 32 with the hot pressing surface. When the second sensor 82 detects the second sensing sheet, it means that the pressure plate 32 and the hot pressing surface are moved and pressed into place, and the sealing of the packaging bag is completed. At this time, the control unit can control the drive motor 51 to rotate in the opposite direction to drive the connecting seat 2 and the heating component 3 to move toward the first end of the threaded screw 53. When the first sensor 81 detects the first sensing sheet 91, it means that the connecting seat 2 and the heating component 3 are restored to the initial position and initial state. At this time, the control unit can control the drive motor 51 to stop rotating to prepare for the next sealing.

[0065] In the embodiment of the present invention, Figure 1 and Figure 2 As shown, the above-mentioned sealing device can also include two guide plates 6, and the two guide plates 6 are respectively located on both sides of the heating plate 31 along the first direction; the end of the guide plate 6 adjacent to the hot pressing surface has a guide angle 61 for guiding the conveying path of the packaging bag, which can guide the opening of the packaging bag to be inserted into the accommodating gap between the hot pressing surface and the counter-pressing plate 32, and can ensure that the opening of the packaging bag is accurately aligned with the sealing device.

[0066] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A sealing device, characterized in that: include: A support frame, the support frame comprising a mounting surface; A connecting seat, the connecting seat is movably mounted on the mounting surface along a first direction, wherein the first direction is parallel to the mounting surface; A heat sealing assembly, the heat sealing assembly comprising a heating plate and two counter-pressure plates; The heating plate is fixed to a side of the connecting seat away from the mounting surface and is conductive, and comprises two hot pressing surfaces arranged along a second direction, each of the hot pressing surfaces is provided with a heating strip extending along a first direction, and the second direction is parallel to the mounting surface and perpendicular to the second direction; The two pressing plates are respectively arranged opposite to the two hot pressing surfaces, each of the pressing plates can move along the second direction relative to the hot pressing surface, and each of the pressing plates has a heat-resistant pad arranged opposite to the heating strip on one side facing the heating plate; A driving assembly is used to drive the connecting seat and the heating assembly to move along a first direction and to drive the two pressing plates to move along a second direction.

2. The sealing device according to claim 1, characterized in that: The side of the heating strip facing the heat-resistant pad is provided with a heat-conducting and insulating anti-sticking spacer.

3. The sealing device according to claim 1, characterized in that: The hot pressing surface is provided with a heat insulating pad except for the area where the heating strip is located.

4. The sealing device according to claim 1, characterized in that: The heat sealing assembly further includes a heating electrode group, and the heating electrode group includes a positive electrode and a negative electrode connected to the heating plate.

5. The sealing device according to claim 1, characterized in that: At least one first guide rail extending along a first direction is arranged on the mounting surface, and the connecting seat has at least one first sliding block corresponding to the at least one first guide rail on a side facing the mounting surface, and the first sliding block is slidably connected to the corresponding first guide rail along the first direction.

6. The sealing device according to claim 5, characterized in that: The pressure plate is slidably connected to the connecting seat via a first connecting portion, and the connecting seat has at least one second guide rail extending along a second direction on a side facing the heating plate, and the first connecting portion has at least one second slider corresponding to the at least one second guide rail, and the second slider is slidably connected to the corresponding second guide rail along the second direction.

7. The sealing device according to claim 6, characterized in that: The driving assembly includes a driving motor, a transmission assembly, a threaded screw, a screw nut, a second connecting portion and a third connecting portion; The threaded screw is located between the support surface and the heating plate, the threaded screw extends along a first direction, and both ends of the threaded screw are rotatably connected to the support frame; The lead screw nut is threadedly connected to the threaded lead screw, and the connecting seat is connected to the lead screw nut via a second connecting portion; The driving motor is mounted on the supporting frame, and the driving motor is transmission-connected to the first end of the threaded screw through the transmission assembly.

8. The sealing device according to claim 7, characterized in that: It also includes at least one first limit block, at least one second limit block and at least one third limit block, wherein the at least one first limit block is arranged at the first end of the threaded screw and is used to limit the position of the connecting seat, the at least one second limit block is located in the area of ​​the mounting surface close to the second end of the threaded screw and is used to limit the position of the connecting seat, and the at least one third limit block is located in the area of ​​the connecting seat facing the heating plate and close to the end of the second guide rail and is used to limit the position of the pressure plate.

9. The sealing device according to claim 8, characterized in that: The connecting seat is connected to the second connecting portion through at least one connecting rod, the connecting rod extends along the first direction, the first end of the connecting rod is connected to a side of the connecting seat adjacent to the second end of the threaded screw, the second end of the connecting rod has a limiting portion, the connecting rod passes through the second connecting portion, and a preset friction force exists between the side wall of the connecting rod and the second connecting portion; The driving assembly also includes two transmission rods located between the support frame and the heating plate, the extension direction of the transmission rods is parallel to the mounting surface, the first end of the transmission rod is rotatably connected to the second connecting portion via a first rotating shaft, the second ends of the two transmission rods are rotatably connected to the two pressing plates via second rotating shafts, and the axis center lines of the first rotating shaft and the second rotating shaft are perpendicular to the mounting surface.

10. The sealing device according to claim 9, characterized in that: It also includes a first sensor, a first sensing sheet, a second sensor, a second sensing sheet and a control unit; The first sensor is located on the mounting frame and is disposed adjacent to the first end of the threaded screw, the first sensing sheet is located on the connecting seat, and the first sensor is used to detect the first sensing sheet; The second sensor is located on the counter-pressing plate, the second sensing sheet is located on the connecting seat and is arranged adjacent to the hot-pressing surface of the heating plate, and the second sensor is used to detect the second sensing sheet; The control unit is connected to the first sensor, the second sensor, and the drive motor signal, and is used to control the working state of the drive motor according to the detection information of the first sensor and the second sensor.

11. The sealing device according to any one of claims 1 to 10, characterized in that: It also includes two guide plates, which are respectively located on both sides of the heating plate along the first direction; the end of the guide plate adjacent to the hot pressing surface has a guide angle for guiding the conveying path of the packaging bag.

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