Sealing equipment for packaging bag

By designing a sloping surface and pressure plate structure in the sealing equipment, the problems of unstable sealing quality and slow speed are solved, achieving a highly efficient and stable heat sealing effect that is suitable for packaging bags of different materials.

CN224241427UActive Publication Date: 2026-05-15NANJING LANGHUA PACKAGING CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
NANJING LANGHUA PACKAGING CO LTD
Filing Date
2025-04-28
Publication Date
2026-05-15

AI Technical Summary

Technical Problem

Existing heat sealing equipment suffers from problems such as unstable sealing quality, slow speed, high energy consumption, and poor adaptability to packaging bags of different materials during the sealing process.

Method used

A sealing device was designed, which uses a bevel on a guide rod and pressure plates and heat sealing plates above and to the side of it to fix and heat seal the bag opening using a drive assembly and a telescopic assembly, ensuring the flatness and sealing quality of the heat seal.

Benefits of technology

It improves the stability and efficiency of sealing, making the heat sealing process faster and more adaptable, suitable for packaging bags of different materials.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224241427U_ABST
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Abstract

The utility model is applicable to the technical field of packaging bag processing, and provides sealing equipment for packaging bags, which comprises a vertical plate, a carrier plate is arranged on one side of the vertical plate, a guide rod is arranged on the front surface of the vertical plate in a penetrating manner, a pressing plate is arranged on one side, deviating from the carrier plate, of the guide rod and above the guide rod, and the pressing plates are connected with a driving component. An inclined plane is arranged on the side wall of the guide rod and located between the two pressing plates, a heat sealing plate is arranged on the front face of the inclined plane, and the heat sealing plate is connected with a telescopic assembly; preferably, the telescopic assembly comprises a first fixing plate, an electric telescopic rod is arranged on the first fixing plate in a penetrating mode, and the electric telescopic rod drives the heat sealing plate. According to the scheme, the pressing plates are arranged above and on the sides of the upper slopes of the guide rods to fix the two sides of the bag opening, then the bag opening is subjected to heat sealing on the slopes, heat sealing flatness and sealing quality are guaranteed, sealing is stable, heat sealing efficiency is high, and production and machining are greatly facilitated.
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Description

Technical Field

[0001] This utility model belongs to the field of packaging bag processing technology, and in particular relates to a sealing device for packaging bags. Background Technology

[0002] Packaging bags are bags used to package various items, products, or food. They are a very important part of the modern packaging industry. The main functions of packaging bags are to protect products, improve transportation efficiency, increase the attractiveness of goods, and sometimes provide convenience (such as easy-open seals and resealability).

[0003] Sealing packaging bags is a crucial step in ensuring that products are not contaminated, damaged, or lost during transportation, storage, and sales. Sealing not only prevents external factors (such as air, moisture, and contaminants) from entering, but also protects the quality and safety of the goods.

[0004] Common packaging bag sealing methods include heat sealing, cold sealing, adhesive sealing, and sewing sealing. Existing heat sealing equipment typically uses heating elements to heat and apply pressure to the edges of the packaging bag, melting the bag material and bonding it together. However, existing heat sealing equipment has some shortcomings in the sealing process, such as unstable sealing quality, slow sealing speed, high energy consumption, and poor adaptability to packaging bags of different materials. Therefore, this application proposes a sealing device for packaging bags. Utility Model Content

[0005] The purpose of this invention is to provide a sealing device for packaging bags to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a sealing device for packaging bags, comprising a vertical plate, a carrier plate on one side of the vertical plate, a guide rod passing through the front of the vertical plate, a pressure plate on the side of the guide rod away from the carrier plate and above it, each pressure plate being connected to a driving assembly, an inclined surface on the side wall of the guide rod located between the two pressure plates, a heat sealing plate on the front of the inclined surface, and a telescopic assembly connected to the heat sealing plate.

[0007] Preferably, the telescopic assembly includes a first fixed plate, through which an electric telescopic rod passes, and the electric telescopic rod drives a heat-sealing plate.

[0008] Preferably, a strip plate is provided between the output end of the electric telescopic rod and the heat-sealing plate.

[0009] Preferably, the drive assembly includes a second fixing plate, which is L-shaped, and a cylinder is inserted through the side wall of the second fixing plate. The output end of the cylinder is connected to the pressure plate.

[0010] Preferably, a collection box is provided on the side wall of the vertical plate below the guide rod.

[0011] This utility model has at least the following beneficial effects:

[0012] This utility model provides a sealing device for packaging bags. By setting pressure plates above and to the side of the inclined surface on the guide rod to fix both sides of the bag opening, the bag opening is then heat-sealed on the inclined surface, ensuring the flatness and sealing quality of the heat seal, stable sealing, and fast heat sealing efficiency, which greatly facilitates production and processing. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 for Figure 1 Enlarged schematic diagram of the structure at position A in the middle.

[0015] In the attached diagram, the following are the reference numerals: 1. Vertical plate; 2. Carrier plate; 3. Guide rod; 4. Inclined surface; 5. First fixed plate; 6. Electric telescopic rod; 7. Strip plate; 8. Heat-sealing plate; 9. Pressure plate; 10. Second fixed plate; 11. Cylinder; 12. Collection box. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. 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 scope of protection of the present utility model.

[0017] Example

[0018] Please see Figure 1 and Figure 2 This utility model provides a technical solution: a sealing device for packaging bags, including a vertical plate 1, a carrier plate 2 on one side of the vertical plate 1, specifically, the carrier plate 2 is fixedly connected to the vertical plate 1, a guide rod 3 is provided through the front of the vertical plate 1, specifically, the guide rod 3 is fixedly connected to the vertical plate 1, a pressure plate 9 is provided on the side of the guide rod 3 away from the carrier plate 2 and above it, and a driving assembly is connected to the pressure plate 9. An inclined surface 4 is provided on the side wall of the guide rod 3 between the two pressure plates 9, and a heat sealing plate 8 is provided on the front of the inclined surface 4, and a telescopic assembly is connected to the heat sealing plate 8.

[0019] In this embodiment, the packaging bag is placed on the carrier plate 2, and the bag opening is placed on the guide rod 3. The bag opening extends to the side wall of the guide rod 3. The two pressure plates 9 are driven by the drive assembly to press the two sides of the bag opening. The telescopic assembly drives the heat sealing plate 8 to move to the inclined surface 4, and cooperates with the inclined surface 4 to heat seal the bag opening part on the inclined surface 4.

[0020] Furthermore, the telescopic assembly includes a first fixed plate 5, specifically, the first fixed plate 5 is fixedly connected to the vertical plate 1, and the first fixed plate 5 is provided with an electric telescopic rod 6, specifically, the electric telescopic rod 6 is fixedly connected to the first fixed plate 5, and the electric telescopic rod 6 drives the heat-sealing plate 8.

[0021] In this embodiment, the electric telescopic rod 6 drives the heat-sealing plate 8 to move toward or away from the inclined plane 4.

[0022] Furthermore, a strip plate 7 is provided between the output end of the electric telescopic rod 6 and the heat-sealing plate 8.

[0023] In this embodiment, the output ends of the strip plate 7, the heat-sealing plate 8, and the electric telescopic rod 6 are all fixedly connected. The heat-sealing plate 8 is fixed by the cooperation between the strip plate 7 and the heat-sealing plate 8.

[0024] Furthermore, the drive assembly includes a second fixing plate 10. Specifically, the second fixing plate 10 is fixedly connected to the vertical plate 1. The second fixing plate 10 is L-shaped. A cylinder 11 is provided through the side wall of the second fixing plate 10. Specifically, the fixing seat of the cylinder 11 is fixedly connected to the second fixing plate 10. The output end of the cylinder 11 is connected to the pressure plate 9. Specifically, the output end of the cylinder 11 is fixedly connected to the pressure plate 9.

[0025] In this embodiment, the pressure plate 9 is pressed and fixed by the cylinder 11.

[0026] Furthermore, a collection box 12 is provided on the side wall of the vertical plate 1 below the guide rod 3.

[0027] In this embodiment, the sealed packaging bags are collected by the collection box 12 for convenient unified transportation.

[0028] The working principle and usage process of this utility model: After the utility model is installed, work according to the above implementation method until all working steps are completed.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sealing device for packaging bags, characterized in that, The system includes a vertical plate (1), a carrier plate (2) on one side of the vertical plate (1), a guide rod (3) passing through the front of the vertical plate (1), a pressure plate (9) on the side of the guide rod (3) away from the carrier plate (2) and above it, and a drive assembly connected to each pressure plate (9). The side wall of the guide rod (3) between the two pressure plates (9) has an inclined surface (4), and a heat-sealing plate (8) is provided on the front of the inclined surface (4). The heat-sealing plate (8) is connected to a telescopic assembly.

2. The sealing device for packaging bags according to claim 1, characterized in that: The telescopic assembly includes a first fixed plate (5), through which an electric telescopic rod (6) passes, and the electric telescopic rod (6) drives a heat-sealing plate (8).

3. A sealing device for packaging bags according to claim 2, characterized in that: A strip plate (7) is provided between the output end of the electric telescopic rod (6) and the heat sealing plate (8).

4. A sealing device for packaging bags according to claim 1, characterized in that: The drive assembly includes a second fixing plate (10), which is L-shaped. A cylinder (11) is provided through the side wall of the second fixing plate (10), and the output end of the cylinder (11) is connected to the pressure plate (9).

5. A sealing device for packaging bags according to claim 1, characterized in that: A collection box (12) is provided on the side wall of the vertical plate (1) below the guide rod (3).