Packaging bag heat sealing mechanism

Abstract

The utility model discloses a packaging bag heat sealing mechanism which comprises a rack, a conveying assembly, a bag supporting assembly and a heat sealing assembly, and the conveying assembly is connected to the rack and used for conveying packaging bags; the bag supporting assembly is arranged at the front end of the packaging bag conveying direction of the conveying assembly and used for bearing and supporting sealing openings of the packaging bags. The heat sealing assembly and the bag supporting assembly are oppositely arranged, the heat sealing assembly comprises a lifting structure and a heat sealing plate structure, and the lifting structure is connected to the rack and is in driving connection with the heat sealing plate structure so that the heat sealing plate structure and the bag supporting assembly can be closed or separated from each other; the bag supporting assembly and the heat sealing plate structure are each provided with a heat insulation buffering cushion. According to the technical scheme, it is guaranteed that pressure is even when the heat sealing cutter makes contact with a packaging bag, and therefore heat sealing consistency and reliability are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging bag packaging, in particular to a packaging bag heat sealing mechanism. Background Art

[0002] The heat-sealing mechanism for packaging bags is a crucial component of packaging machinery. It's primarily used to heat and seal the bag opening during the sealing process, ensuring the integrity and safety of the packaged contents. The heat-sealing process heats the bag material to near its melting point and then cools it under pressure, bonding the materials together.

[0003] However, if the pressure distribution between the heat sealing knife and the packaging bag is uneven, it may cause the sealing line to be inconsistent in width or even partially unsealed. Utility Model Content

[0004] The main purpose of the utility model is to provide a packaging bag heat sealing mechanism, which aims to ensure uniform pressure when a heat sealing knife contacts the packaging bag, thereby improving the consistency and reliability of heat sealing.

[0005] To achieve the above-mentioned purpose, the packaging bag heat sealing mechanism proposed in the present invention includes:

[0006] frame;

[0007] A conveying assembly connected to the frame and used for conveying packaging bags;

[0008] a bag supporting assembly, which is disposed at the front end of the conveying assembly in the direction of transporting the packaging bag and is used to support the sealing of the packaging bag; and

[0009] a heat sealing assembly, the heat sealing assembly and the bag supporting assembly being arranged opposite to each other, the heat sealing assembly comprising a lifting structure and a heat sealing plate structure, the lifting structure being connected to the frame and drivingly connected to the heat sealing plate structure so as to close or separate the heat sealing plate structure and the bag supporting assembly;

[0010] Wherein, the bag holding assembly and the heat sealing plate structure are both provided with heat insulating cushions.

[0011] In one possible implementation, the heat sealing plate structure includes:

[0012] a fixing plate connected to the lifting structure;

[0013] a heat insulation plate, the heat insulation plate being arranged on one side of the fixing plate;

[0014] A heat sealing knife is connected to the bottom of the heat insulation board, a heating element is inserted into the heat sealing knife, and the heat insulation buffer pad is arranged on the side of the heat sealing knife away from the packaging bag.

[0015] In one possible embodiment, the bag holding assembly includes:

[0016] a bottom plate connected to the frame;

[0017] A bottom liner, the bottom liner is arranged at the edge of the conveying assembly and is arranged opposite to the heat sealing knife, and a heat insulating cushion is provided on the bottom liner; and

[0018] A plurality of columns are provided, wherein one end of the column is connected to the base plate, and the other end of the column is connected to the base lining.

[0019] In one possible embodiment, the conveying assembly includes:

[0020] a lifting platform connected to the frame;

[0021] A conveyor belt is driven and connected to the lifting platform so that the sealing of the packaging bag is located between the bag supporting assembly and the heat sealing assembly.

[0022] The technical solution of the utility model adopts a lifting structure to drive the heat sealing plate structure to move, so that it is pressed down toward the bag holding assembly until it is closed, and the heat is transferred to the seal of the packaging bag for fusion sealing; and a heat insulating buffer pad is provided on both the heat sealing plate structure and the bag holding assembly, which can reduce the loss of heat to the surrounding environment, maintain the temperature of the heat sealing area stable, and protect other components from damage by high temperature; it can also absorb the vibration and pressure fluctuations generated during the heat sealing process, ensure that the pressure when the heat sealing plate structure contacts the packaging bag is uniform, thereby improving the consistency and reliability of the heat seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0024] Figure 1 This is a structural diagram of an embodiment of a heat-sealing mechanism for a packaging bag according to the present invention;

[0025] Figure 2 This is a schematic structural diagram of an embodiment of a heat sealing assembly of the present utility model;

[0026] Figure 3 for Figure 2 A partial enlarged view of point A;

[0027] Figure 4This is a structural schematic diagram of another perspective of an embodiment of the heat sealing assembly of the present invention;

[0028] Figure 5 This is a structural diagram of an embodiment of a conveying assembly of the present utility model.

[0029] Description of Figure Numbers:

[0030] 10. Frame; 20. Conveying assembly; 21. Lifting platform; 22. Conveyor belt; 30. Bag holding assembly; 31. Bottom plate; 32. Bottom lining; 33. Column; 40. Heat sealing assembly; 41. Lifting structure; 42. Heat sealing plate structure; 421. Fixed plate; 422. Heat insulation plate; 423. Heat sealing knife; 4231. Heating element; 50. Heat insulation cushion.

[0031] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0033] In response to the problems pointed out in the background technology, the packaging bag heat sealing mechanism proposed in the present invention includes a frame 10, a conveying assembly 20, a bag holding assembly 30 and a heat sealing assembly 40. The conveying assembly 20 is connected to the frame 10 and is used to transport the packaging bag; the bag holding assembly 30 is arranged at the front end of the conveying assembly 20 in the direction of transporting the packaging bag, and is used to support the seal of the packaging bag; the heat sealing assembly 40 and the bag holding assembly 30 are arranged opposite to each other, and the heat sealing assembly 40 includes a lifting structure 41 and a heat sealing plate structure 42. The lifting structure 41 is connected to the frame 10 and drives the heat sealing plate structure 42 to close or separate the heat sealing plate structure 42 and the bag holding assembly 30; wherein, both the bag holding assembly 30 and the heat sealing plate structure 42 are provided with an insulating buffer pad 50.

[0034] Combined with reference Figures 1 to 5As shown, the frame 10 can be a square frame formed by welding or threading materials such as profiles or square steel. It is used to mount, secure, or support components such as the conveyor assembly 20, the bag support assembly 30, and the heat sealing assembly 40. The conveyor assembly 20 is used to carry the bags to be sealed and transport the sealed bags. The conveyor assembly 20 can be a conveyor belt 22, or it can be a combination of a support platform and a robotic arm, which transfers the bags placed on the support platform via the robotic arm. A bag support assembly 30 can be located at the front end of the conveyor assembly 20 to support the portion of the bags that extends beyond the conveyor assembly 20. The bag support assembly 30 can be elongated and fixed directly to the frame 10 or via connecting posts. A heat sealing assembly 40 can be located above the bag support assembly 30. The heat sealing assembly 40 includes a heat sealing plate structure 42 and a lifting mechanism 41. The lifting mechanism 41 can be a motor-driven screw-nut assembly, or a pneumatic or hydraulic cylinder, providing the necessary pressure during the heat sealing process to ensure close contact between the bags while they are heated. A heating element 4231 is provided within the heat-sealing plate structure 42, typically employing an electric heating tube, resistance wire, or infrared heater to provide the necessary heat for fusing the packaging bag. A heat-insulating cushion 50 is also provided on the bag support assembly 30 and the heat-sealing plate structure 42. This cushion has properties such as high-temperature resistance, heat insulation, shock absorption, and sealing, and can be made of materials such as high-temperature-resistant silicone foam, fluororubber foam, and polytetrafluoroethylene. This cushion can reduce heat loss to the surrounding environment, maintain a stable temperature in the heat-sealing area, and protect other components from damage by high temperatures. It can also maintain a constant regional temperature, improving heat-sealing efficiency and quality. It can also absorb vibrations and pressure fluctuations generated during the heat-sealing process, ensuring uniform pressure when the heat-sealing plate structure 42 contacts the packaging bag, thereby improving heat-sealing consistency and reliability.

[0035] In one possible embodiment, the heat sealing plate structure 42 includes a fixed plate 421, an insulation plate 422 and a heat sealing knife 423, wherein the insulation plate 422 is arranged on one side of the fixed plate 421; the heat sealing knife 423 is connected to the bottom of the insulation plate 422, a heating element 4231 is passed through the heat sealing knife 423, and the insulation buffer pad 50 is arranged on the side of the heat sealing knife 423 facing away from the packaging bag.

[0036] Combined with reference Figures 2 to 4As shown, the fixed plate 421 is connected to the lifting structure 41, and a heat insulation plate 422 is connected to one side of the fixed plate 421 to protect other components from damage by high temperature. A heat sealing knife 423 is provided at the bottom of the fixed plate 421 and the heat insulation plate 422. The heat sealing knife 423 is connected to the heating element 4231, directly contacts the packaging bag, and transfers heat to the bag opening material. In addition to the above structure, it also includes a temperature control system, including a temperature sensor and a controller, which are used to detect and adjust the temperature of the heat sealing knife 423 to ensure precise control of the heating temperature. It can also include a cooling system, using an air cooling or water cooling system to accelerate the cooling process after heat sealing and speed up production; a positioning and guiding system can also be provided to ensure the accurate position and stable guidance of the packaging bag during the heat sealing process to prevent the bag opening from shifting.

[0037] In a possible embodiment, the bag holding assembly 30 includes:

[0038] A bottom plate 31 connected to the frame 10;

[0039] A bottom liner 32 , the bottom liner 32 being disposed at an edge of the conveying assembly 20 and opposite to the heat sealing knife 423 , and a heat insulating cushion 50 being disposed on the bottom liner 32 ; and

[0040] A plurality of columns 33 are provided, one end of each column 33 being connected to the bottom plate 31 and the other end being connected to the bottom lining 32 .

[0041] Combined with reference Figure 1 As shown, the base lining 32 and the bottom plate 31 are connected by a plurality of columns 33 , both of which can be in the shape of long strips. The bottom plate 31 is fixedly connected to the frame 10 , and the base lining 32 can be covered with a heat-insulating material.

[0042] In one possible implementation, the conveying assembly 20 includes:

[0043] A lifting platform 21, the lifting platform 21 is connected to the frame 10;

[0044] The conveyor belt 22 is driven and connected to the lifting platform 21 so that the sealing of the packaging bag is located between the bag holding component 30 and the heat sealing component 40.

[0045] Combined with reference Figure 5As shown, in order to keep the bag opening of the packaging bag between the heat-sealing plate structure 42 and the bag-holding assembly 30, and avoid the bag opening being offset when pressing down during the heat-sealing process, a lifting platform 21 can be set at the bottom of the conveyor belt 22. The lifting platform 21 can be driven by a cylinder or a hydraulic cylinder, or a motor-driven screw nut structure. Through automatic adjustment of the lifting platform 21, the bag opening of the packaging bag can be kept in the middle position of the clamping space formed by the heat-sealing plate structure 42 and the bag-holding assembly 30, avoiding the bag opening being tilted up when pressing down during the heat-sealing process, resulting in loose sealing, loose sealing or partial unsealing.

[0046] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the drawings. This is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0047] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A packaging bag heat sealing mechanism, characterized in that: include: frame; A conveying assembly connected to the frame and used for conveying packaging bags; A bag supporting assembly, which is arranged at the front end of the conveying assembly in the direction of transporting the packaging bag and is used to support the sealing of the packaging bag; as well as a heat sealing assembly, the heat sealing assembly and the bag supporting assembly being arranged opposite to each other, the heat sealing assembly comprising a lifting structure and a heat sealing plate structure, the lifting structure being connected to the frame and drivingly connected to the heat sealing plate structure so as to close or separate the heat sealing plate structure and the bag supporting assembly; Wherein, the bag holding assembly and the heat sealing plate structure are both provided with heat insulating cushions.

2. The packaging bag heat sealing mechanism according to claim 1, characterized in that: The heat sealing plate structure comprises: a fixing plate connected to the lifting structure; a heat insulation plate, the heat insulation plate being arranged on one side of the fixing plate; A heat sealing knife is connected to the bottom of the heat insulation board, a heating element is inserted into the heat sealing knife, and the heat insulation buffer pad is arranged on the side of the heat sealing knife away from the packaging bag.

3. The packaging bag heat sealing mechanism according to claim 2, characterized in that: The bag holding assembly comprises: a bottom plate connected to the frame; A bottom liner, the bottom liner is arranged at the edge of the conveying assembly and is arranged opposite to the heat sealing knife, and a heat insulating cushion is provided on the bottom liner; and A plurality of columns are provided, wherein one end of the column is connected to the base plate, and the other end of the column is connected to the base lining.

4. The packaging bag heat sealing mechanism according to any one of claims 1 to 3, characterized in that: The conveying assembly comprises: a lifting platform connected to the frame; A conveyor belt is driven and connected to the lifting platform so that the sealing of the packaging bag is located between the bag supporting assembly and the heat sealing assembly.

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